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Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Regional Modeling of Ammonia Emissions from Native Soil Sources in California  

Science Conference Proceedings (OSTI)

The development of a new emissions inventory of ammonia volatilization from native soil sources (excluding direct emissions from fertilizer application sources) for the state of California is discussed. Because a comprehensive measurement dataset ...

Christopher Potter; Steven Klooster; Charles Krauter

2003-11-01T23:59:59.000Z

2

Regional Climate Information & Modeling  

NLE Websites -- All DOE Office Websites (Extended Search)

Information & Modeling Print E-mail The specific impacts and vulnerabilities posed by climate change are largely defined by regional differences 9in things like geography,...

3

Modeling Global and Regional Net Primary Production under Elevated Atmospheric CO2: On a Potential Source of Uncertainty  

Science Conference Proceedings (OSTI)

Terrestrial ecosystem models are built, among several reasons, to explore how the Earth’s biosphere responds to climate change and to the projected continual increase of atmospheric CO2 concentration. Many of these models adopt the Farquhar et ...

Mustapha El Maayar; Navin Ramankutty; Christopher J. Kucharik

2006-01-01T23:59:59.000Z

4

Performance of NMC's Regional Models  

Science Conference Proceedings (OSTI)

This paper details the performance characteristics of the two regional dynamical models used at the National Meteorological Center to forecast for North America. Strengths and weaknesses of these models—the limited-area fine-mesh (LFM) model and ...

Norman W. Junker; James E. Hoke; Richard H. Grumm

1989-09-01T23:59:59.000Z

5

Regional Climate Information & Modeling  

NLE Websites -- All DOE Office Websites (Extended Search)

is a series of six region-specific adaptation tools for the coastal communities in Indonesia, Malaysia, the Philippines, the Solomon Islands, Timor-Leste, and Papua New Guinea....

6

Livermore Regional Air Quality model (LIRAQ-1)  

SciTech Connect

The Livermore Regional Air Quality (LIRAQ) model is an Eulerian grid model developed for use in assessing the regional air quality of a region with temporally and spatially varying meteorology in complex terrain. The first implementation of this approach is embodied in the LIRAQ-1 model and is intended for use with either simple chemical systems or relatively inert pollutants. The basic model formulation is based on the conservation of mass equation integrated vertically from the surface to the base of an inversion layer, thereby creating a single layer model with a grid structure established in the two horizontal dimensions. Surface pollutant concentrations are related to vertical average concentrations using a logarithmic profile. Atmospheric transport, inversion height, source emissions, and topography are all prescribed. Data for the San Francisco Bay Area obtained during 1973 have been used in validation studies. (auth)

MacCracken, M.C.; Grant, K.E.

1975-10-01T23:59:59.000Z

7

CH4 sources estimated from atmospheric observations of CH4 and its C-13/C-12 isotopic ratios: 2. Inverse modeling of CH4 fluxes from geographical regions  

E-Print Network (OSTI)

atmosphere, and CH 4 from fossil fuels such as coal andTermites Biomass burning Fossil Fuels Coal Natural gas andbiomass burning and fossil fuel source processes to the a

Mikaloff Fletcher, S.E.; Tans, P P; Bruhwiler, L M; Miller, J B; Heimann, M

2004-01-01T23:59:59.000Z

8

NETL: Predictive Modeling and Evaluation - CMU Regional Modeling Study  

NLE Websites -- All DOE Office Websites (Extended Search)

Regional Source-Receptor Modeling Study Regional Source-Receptor Modeling Study The Pittsburgh Air Quality Study (PAQS) [PDF-744KB] is comprised of three inter-related components: 1) ambient PM measurements, 2) source characterization, and 3) deterministic and statistical air quality modeling. This effort will permit clarification of the contribution of coal-fired power plants to fine ambient PM2.5 (particulate matter with an aerodynamic diameter less than 2.5 µm). The resources from the Department of Energy (DOE) will be leveraged with resources from the Environmental Protection Agency (EPA) and other organizations. Clarkson University (Hopke group) will apply advanced receptor models to identify the nature, location and contribution of the sources of particulate matter observed by the measurements made as part of the PAQS. Several forms of factor analysis including Positive Matrix Factorization (PMF) and UNMIX will be applied in order to identify the composition and contributions of the sources. Potential Source Contribution Function analysis as well as Residence Time Weighted Concentration analysis will be applied to the determination of the locations of the likely major contributing sources. The aforementioned factor analysis methods will also be applied to the spatially distributed data both on a single species and multiple species basis and to compare these results with those obtained utilizing the back-trajectory-based methods. The availability of highly time resolved data should permit greater source resolution and will be examined to determine how much increased source specificity can be obtained from the increased time resolution in the data. Assistance will be provided with the multivariate calibration that will permit the use of single-particle mass spectrometry data to estimate ambient concentrations of particulate species. These analyses should provide a better understanding of the source/receptor relationships that lead to the observed particle concentrations in the Pittsburgh area.

9

The NMC Nested Regional Spectral Model  

Science Conference Proceedings (OSTI)

A nested primitive equation regional spectral model is developed. The model consists of two components—a low-resolution global spectral model and a high-resolution regional spectral model. The two components have identical vertical structure and ...

Hann-Ming Henry Juang; Masao Kanamitsu

1994-01-01T23:59:59.000Z

10

Total cost model for making sourcing decisions  

E-Print Network (OSTI)

This thesis develops a total cost model based on the work done during a six month internship with ABB. In order to help ABB better focus on low cost country sourcing, a total cost model was developed for sourcing decisions. ...

Morita, Mark, M.B.A. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

11

Hybrid regional air pollution models  

SciTech Connect

This discussion deals with a family of air quality models for predicting and analyzing the fine particulate loading in the atmosphere, for assessing the extent and degree of visibility impairment, and for determining the potential of pollutants for increasing the acidity of soils and water. The major horizontal scales of interest are from 400km to 2000km; and the time scales may vary from several hours, to days, weeks, and a few months or years, depending on the EPA regulations being addressed. First the role air quality models play in the general family of atmospheric simulation models is described. Then, the characteristics of a well-designed, comprehensive air quality model are discussed. Following this, the specific objectives of this workshop are outlined, and their modeling implications are summarized. There are significant modeling differences produced by the choice of the coordinate system, whether it be the fixed Eulerian system, the moving Lagrangian system, or some hybrid of the two. These three systems are briefly discussed, and a list of hybrid models that are currently in use are given. Finally, the PNL regional transport model is outlined and a number of research needs are listed.

Drake, R.L.

1980-03-01T23:59:59.000Z

12

Surface Boundary Conditions for Mesoscale Regional Climate Models  

Science Conference Proceedings (OSTI)

This paper utilizes the best available quality data from multiple sources to develop consistent surface boundary conditions (SBCs) for mesoscale regional climate model (RCM) applications. The primary SBCs include 1) fields of soil characteristic (...

Xin-Zhong Liang; Hyun I. Choi; Kenneth E. Kunkel; Yongjiu Dai; Everette Joseph; Julian X. L. Wang; Praveen Kumar

2005-10-01T23:59:59.000Z

13

Regional air quality in the four corners studys region: modeling approach  

Science Conference Proceedings (OSTI)

A two-dimensional Eulerian air pollutant transport model was used in an air quality study of the Four Corners region conducted for the National Commission on Air Quality. The regional modeling methodology and some sample results from the regional air quality analysis are presented. One major advantage of the regional transport model that was employed is that its solution involves the calculation of transfer coefficients that relate emissions to ambient concentrations and deposition and which can be used repeatedly to evaluate alternative scenarios and regulatory policies which represent different emission source configurations. The regional transport model was used in the calculation of the concentration and deposition of SO/sub 2/, SO/sub 4/, and primary fine particulates; and these estimates were used as inputs to regional atmospheric visibility and mass budget calculations. Previous studies have shown that the methods used in the regional air quality analysis give good agreement when comparing observed and estimated values.

Nochumson, D.

1982-01-01T23:59:59.000Z

14

Regions in Energy Market Models  

DOE Green Energy (OSTI)

This report explores the different options for spatial resolution of an energy market model--and the advantages and disadvantages of models with fine spatial resolution. It examines different options for capturing spatial variations, considers the tradeoffs between them, and presents a few examples from one particular model that has been run at different levels of spatial resolution.

Short, W.

2007-02-01T23:59:59.000Z

15

Distributed Processing of a Regional Prediction Model  

Science Conference Proceedings (OSTI)

This paper describes the parallelization of a mesoscale-cloud-scale numerical weather prediction model and experiments conducted to assess its performance. The model used is the Advanced Regional Prediction System (ARPS), a limited-area ...

Kenneth W. Johnson; Jeff Bauer; Gregory A. Riccardi; Kelvin K. Droegemeier; Ming Xue

1994-11-01T23:59:59.000Z

16

NON-LINEAR MODELING OF THE RHIC INTERACTION REGIONS.  

Science Conference Proceedings (OSTI)

For RHIC's collision lattices the dominant sources of transverse non-linearities are located in the interaction regions. The field quality is available for most of the magnets in the interaction regions from the magnetic measurements, or from extrapolations of these measurements. We discuss the implementation of these measurements in the MADX models of the Blue and the Yellow rings and their impact on beam stability.

TOMAS,R.FISCHER,W.JAIN,A.LUO,Y.PILAT,F.

2004-07-05T23:59:59.000Z

17

Regional Dynamics Model (REDYN) | Open Energy Information  

Open Energy Info (EERE)

Regional Dynamics Model (REDYN) Regional Dynamics Model (REDYN) Jump to: navigation, search Tool Summary Name: REDYN Agency/Company /Organization: Regional Dynamics Inc. Sector: Energy Phase: Determine Baseline, "Evaluate Options and Determine Feasibility" is not in the list of possible values (Bring the Right People Together, Create a Vision, Determine Baseline, Evaluate Options, Develop Goals, Prepare a Plan, Get Feedback, Develop Finance and Implement Projects, Create Early Successes, Evaluate Effectiveness and Revise as Needed) for this property., Develop Goals Topics: Market analysis, Policies/deployment programs, Co-benefits assessment, - Macroeconomic Resource Type: Software/modeling tools User Interface: Desktop Application Website: www.regionaldynamics.com/

18

Regional parking fee : a potential funding source for transit?  

E-Print Network (OSTI)

From a regional mobility perspective, Chicagoland is in serious trouble. The current Chicago Transit Authority (CTA) funding shortfall is just the most recent evidence of major flaws in the region's transit governance and ...

Misiak, Jodie Mercer

2005-01-01T23:59:59.000Z

19

A Surface-Corrected Gaussian Model for Elevated Sources  

Science Conference Proceedings (OSTI)

A Gaussian model for continuous elevated sources is developed which uses a continuous distribution of ground-level sources to replace the use of the image source. For the case of Fickian diffusion with uniform wind, this model is mathematically ...

Thomas J. Overcamp

1983-06-01T23:59:59.000Z

20

Update on the Electron Source Model  

SciTech Connect

We summarize work done in FY12 on the Los Alamos Electron Source Model (ESM), which predicts the distribution of beta-decay electrons after a high altitude nuclear explosion (HANE) as a function of L, energy, and pitch angle. In the last year we have compared model results with data taken after the Russian 2 HANE test of 1962 and presented results at the HEART conference. We discuss our future plans to continue comparison with HANE data and to develop the code to allow a more complex set of initial conditions.

Cowee, Misa [Los Alamos National Laboratory; Winske, Dan [Los Alamos National Laboratory

2012-07-17T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Regional Economic Models, Inc. (REMI) Model | Open Energy Information  

Open Energy Info (EERE)

Regional Economic Models, Inc. (REMI) Model Regional Economic Models, Inc. (REMI) Model Jump to: navigation, search LEDSGP green logo.png FIND MORE DIA TOOLS This tool is part of the Development Impacts Assessment (DIA) Toolkit from the LEDS Global Partnership. Tool Summary LAUNCH TOOL Name: REMI Agency/Company /Organization: Regional Economic Models Inc. Sector: Energy Focus Area: Transportation Phase: Determine Baseline, Develop Goals Topics: Baseline projection, GHG inventory, Pathways analysis Resource Type: Software/modeling tools User Interface: Desktop Application Complexity/Ease of Use: Moderate Website: www.remi.com/ Cost: Paid References: http://www.remi.com/index.php?page=overview&hl=en_US Related Tools Job and Economic Development Impact Models (JEDI) The Integrated Environmental Strategies Handbook: A Resource Guide for Air Quality Planning

22

State of the Art of Air-source Heat Pump for Cold Regions  

E-Print Network (OSTI)

In this paper, research on air source heat pump systems for cold regions in recent years is first summarized and compared. These systems can be divided into three kinds: a single-stage compression heat pump, liquid/vapor injection heat pump, and a two-stage heat pump. Finally, our research with a two-stage compression variable frequency air source heat pump is presented. A two-control-model with the priority target as COP or heating capacity is advanced. The experimental results show that the COP of this heat pump system is over 2, the compressor discharge temperature under 120, and the heating capacity can meet the heating load needed when the condensing temperature is 50 and outdoor air temperature is over -18.

Tian, C.; Liang, N.

2006-01-01T23:59:59.000Z

23

"Table A28. Total Expenditures for Purchased Energy Sources by Census Region"  

U.S. Energy Information Administration (EIA) Indexed Site

Total Expenditures for Purchased Energy Sources by Census Region" Total Expenditures for Purchased Energy Sources by Census Region" " and Economic Characteristics of the Establishment, 1991" " (Estimates in Million Dollars)" " "," "," "," ",," "," "," "," "," ","RSE" " "," "," ","Residual","Distillate","Natural"," "," ","Coke"," ","Row" "Economic Characteristics(a)","Total","Electricity","Fuel Oil","Fuel Oil(b)","Gas(c)","LPG","Coal","and Breeze","Other(d)","Factors"

24

Source Terms in a Third-Generation Wind Wave Model  

Science Conference Proceedings (OSTI)

A new third-generation ocean wind wave model is presented. This model is based on previously developed input and nonlinear interaction source terms and a new dissipation source term. It is argued that the dissipation source term has to be modeled ...

Hendrik L. Tolman; Dmitry Chalikov

1996-11-01T23:59:59.000Z

25

Deducing Anomalous Wave Source Regions during the Life Cycles of Persistent Flow Anomalies  

Science Conference Proceedings (OSTI)

Anomalous wave source regions are identified during the life cycles of persistent flow anomalies occurring over the North Pacific and North Atlantic Oceans during boreal winter. These cases project strongly upon the Pacific–North American and ...

Robert X. Black

1997-04-01T23:59:59.000Z

26

"Table A37. Total Expenditures for Purchased Energy Sources by Census Region,"  

U.S. Energy Information Administration (EIA) Indexed Site

7. Total Expenditures for Purchased Energy Sources by Census Region," 7. Total Expenditures for Purchased Energy Sources by Census Region," " Census Division, and Economic Characteristics of the Establishment, 1994" " (Estimates in Million Dollars)" " "," "," "," ",," "," "," "," "," ","RSE" " "," "," ","Residual","Distillate","Natural"," "," ","Coke"," ","Row" "Economic Characteristics(a)","Total","Electricity","Fuel Oil","Fuel Oil(b)","Gas(c)","LPG","Coal","and Breeze","Other(d)","Factors"

27

"Table A36. Total Expenditures for Purchased Energy Sources by Census Region,"  

U.S. Energy Information Administration (EIA) Indexed Site

6. Total Expenditures for Purchased Energy Sources by Census Region," 6. Total Expenditures for Purchased Energy Sources by Census Region," " Census Division, Industry Group, and Selected Industries, 1994" " (Estimates in Million Dollars)" ,,,,,,,,,,,"RSE" "SIC"," "," "," ","Residual","Distillate ","Natural"," "," ","Coke"," ","Row" "Code(a)","Industry Group and Industry","Total","Electricity","Fuel Oil","Fuel Oil(b)","Gas(c)","LPG","Coal","and Breeze","Other(d)","Factors" ,,"Total United States"

28

Level: National and Regional Data; Row: NAICS Codes; Column: All Energy Sources Collected;  

U.S. Energy Information Administration (EIA) Indexed Site

Table 7.1 Average Prices of Purchased Energy Sources, 2006; Level: National and Regional Data; Row: NAICS Codes; Column: All Energy Sources Collected; Unit: U.S. Dollars per Physical Units. Selected Wood and Other Biomass Components Coal Components Coke Electricity Components Natural Gas Components Steam Components Total Wood Residues Bituminous Electricity Diesel Fuel Motor Natural Gas Steam and Wood-Related and Electricity from Sources and Gasoline Pulping Liquor Natural Gas from Sources Steam from Sources Waste Gases Waste Oils Industrial Wood Byproducts and Coal Subbituminous Coal Petroleum Electricity from Local Other than Distillate Diesel Distillate Residual Blast Furnace Coke Oven (excluding or LPG and Natural Gas

29

Level: National and Regional Data; Row: NAICS Codes; Column: All Energy Sources Collected;  

U.S. Energy Information Administration (EIA) Indexed Site

Next MECS will be conducted in 2010 Table 7.2 Average Prices of Purchased Energy Sources, 2006; Level: National and Regional Data; Row: NAICS Codes; Column: All Energy Sources Collected; Unit: U.S. Dollars per Million Btu. Selected Wood and Other Biomass Components Coal Components Coke Electricity Components Natural Gas Components Steam Components Total Wood Residues Bituminous Electricity Diesel Fuel Motor Natural Gas Steam and Wood-Related and Electricity from Sources and Gasoline Pulping Liquor Natural Gas from Sources Steam from Sources Waste Gases Waste Oils Industrial Wood Byproducts and Coal Subbituminous Coal Petroleum Electricity from Local Other than Distillate Diesel Distillate Residual Blast Furnace

30

Improvements to the EPA Industrial Source Complex Dispersion Model  

Science Conference Proceedings (OSTI)

Air quality models are a key component in determining air pollution control requirements. The Industrial Source Complex (ISC2) model is a steady-state Gaussian plume model that is used for modeling point, area, volume, and line sources. Since its ...

Dennis G. Atkinson; Desmond T. Bailey; John S. Irwin; Jawad S. Touma

1997-08-01T23:59:59.000Z

31

Source Contributions to VOC's to Ozone Formation in Southeast Texas Using a Source-oriented Air Quality Model  

E-Print Network (OSTI)

Houston-Galveston-Brazoria area is in severe non-attainment status for ozone compliance. Source-oriented mechanistic modeling was used to determine the major sources of VOCs that contributes to ozone formation during the Texas Air Quality Study (TexAQS) from August 16, 2000 to September 7, 2000. Environmental Protection Agency (EPA)?s Community Scale Air Quality Model (CMAQ) version 4.6 was used as a host model to include a revised Statewide Air Pollution Research Center (SAPRC99) photochemical mechanism with source-oriented extensions to track the contributions of Volatile Organic Compounds (VOCs) emissions from diesel engines, biogenic sources, highway gasoline vehicles, fuel combustion, off-highway gasoline engines, solvent utilization and petrochemical industries to ozone formation in the atmosphere. Source-oriented emissions needed to drive the model were generated using a revised Sparse Matrix Operator Kernel Emissions (SMOKE) model version 2.4. VOC/NOx ratios are found to be a critical factor in the formation of ozone. Highest ozone formation rates were observed for ratios from 5-15. The contributions of VOC to ozone formation were estimated based on the linear relationship between the rate of NO to NO2 conversion due to radicals generated from VOC oxidation and the rate of net ozone formation. Petroleum and other industrial sources are the largest anthropogenic sources in the urban Houston region and contribute to 45% of the ozone formation in the HGB area. Highway gasoline vehicles make contributions of approximately 28% to ozone formation. Wildfires contribute to as much 11% of ozone formation on days of high wildfire activity. The model results show that biogenic emissions account for a significant amount of ozone formation in the rural areas. Both highway and off-highway vehicles contribute significantly to ozone formation especially in the downwind region. Diesel vehicles do not contribute significantly to ozone formation due to their low VOC emissions.

Krishnan, Anupama

2010-05-01T23:59:59.000Z

32

Model for a transformer-coupled toroidal plasma source  

Science Conference Proceedings (OSTI)

A two-dimensional fluid plasma model for a transformer-coupled toroidal plasma source is described. Ferrites are used in this device to improve the electromagnetic coupling between the primary coils carrying radio frequency (rf) current and a secondary plasma loop. Appropriate components of the Maxwell equations are solved to determine the electromagnetic fields and electron power deposition in the model. The effect of gas flow on species transport is also considered. The model is applied to 1 Torr Ar/NH{sub 3} plasma in this article. Rf electric field lines form a loop in the vacuum chamber and generate a plasma ring. Due to rapid dissociation of NH{sub 3}, NH{sub x}{sup +} ions are more prevalent near the gas inlet and Ar{sup +} ions are the dominant ions farther downstream. NH{sub 3} and its by-products rapidly dissociate into small fragments as the gas flows through the plasma. With increasing source power, NH{sub 3} dissociates more readily and NH{sub x}{sup +} ions are more tightly confined near the gas inlet. Gas flow rate significantly influences the plasma characteristics. With increasing gas flow rate, NH{sub 3} dissociation occurs farther from the gas inlet in regions with higher electron density. Consequently, more NH{sub 4}{sup +} ions are produced and dissociation by-products have higher concentrations near the outlet.

Rauf, Shahid; Balakrishna, Ajit; Chen Zhigang; Collins, Ken [Applied Materials, Inc., 974 E. Arques Avenue, Sunnyvale, California 94085 (United States)

2012-01-15T23:59:59.000Z

33

Effects of Vegetation Clumping on Two–Source Model Estimates of Surface Energy Fluxes from an Agricultural Landscape during SMACEX  

Science Conference Proceedings (OSTI)

The effects of nonrandom leaf area distributions on surface flux predictions from a two-source thermal remote sensing model are investigated. The modeling framework is applied at local and regional scales over the Soil Moisture–Atmosphere ...

Martha C. Anderson; J. M. Norman; William P. Kustas; Fuqin Li; John H. Prueger; John R. Mecikalski

2005-12-01T23:59:59.000Z

34

Development of a Regional Climate Model of the Western Arctic  

Science Conference Proceedings (OSTI)

An Arctic region climate system model has been developed to simulate coupled interactions among the atmosphere, sea ice, ocean, and land surface of the western Arctic. The atmospheric formulation is based upon the NCAR regional climate model ...

Amanda H. Lynch; William L. Chapman; John E. Walsh; Gunter Weller

1995-06-01T23:59:59.000Z

35

Modeling-Computer Simulations At Nw Basin & Range Region (Biasi...  

Open Energy Info (EERE)

Modeling-Computer Simulations At Nw Basin & Range Region (Biasi, Et Al., 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer...

36

"Table A32. Total Quantity of Purchased Energy Sources by Census Region,"  

U.S. Energy Information Administration (EIA) Indexed Site

Quantity of Purchased Energy Sources by Census Region," Quantity of Purchased Energy Sources by Census Region," " Census Division, Industry Group, and Selected Industries, 1994" " (Estimates in Btu or Physical Units)" ,,,,,,"Natural",,,"Coke" " "," ","Total","Electricity","Residual","Distillate","Gas(c)"," ","Coal","and Breeze"," ","RSE" "SIC"," ","(trillion","(million","Fuel Oil","Fuel Oil(b)","(billion","LPG","(1000","(1000","Other(d)","Row" "Code(a)","Industry Group and Industry","Btu)","kWh)","(1000 bbl)","(1000 bbl)","cu ft)","(1000 bbl)","short tons)","short tons)","(trillion Btu)","Factors"

37

"Table A24. Total Expenditures for Purchased Energy Sources by Census Region,"  

U.S. Energy Information Administration (EIA) Indexed Site

4. Total Expenditures for Purchased Energy Sources by Census Region," 4. Total Expenditures for Purchased Energy Sources by Census Region," " Industry Group, and Selected Industries, 1991" " (Estimates in Million Dollars)" ,,,,,,,,,,,"RSE" "SIC"," "," "," ","Residual","Distillate ","Natural"," "," ","Coke"," ","Row" "Code(a)","Industry Groupsc and Industry","Total","Electricity","Fuel Oil","Fuel Oil(b)","Gas(c)","LPG","Coal","and Breeze","Other(d)","Factors" ,,"Total United States" ,"RSE Column Factors:","0.6 ",0.6,1.3,1.3,0.7,1.2,1.2,1.5,1.1

38

"Table A22. Total Quantity of Purchased Energy Sources by Census Region,"  

U.S. Energy Information Administration (EIA) Indexed Site

2. Total Quantity of Purchased Energy Sources by Census Region," 2. Total Quantity of Purchased Energy Sources by Census Region," " Industry Group, and Selected Industries, 1991" " (Estimates in Btu or Physical Units)" ,,,,,,"Natural",,,"Coke" " "," ","Total","Electricity","Residual","Distillate","Gas(c)"," ","Coal","and Breeze"," ","RSE" "SIC"," ","(trillion","(million","Fuel Oil","Fuel Oil(b)","(billion","LPG","(1000","(1000","Other(d)","Row" "Code(a)","Industry Groups and Industry","Btu)","kWh)","(1000 bbls)","(1000 bbls)","cu ft)","(1000 bbls)","short tons)","short tons)","(trillion Btu)","Factors"

39

An Objective Method for Inferring Sources of Model Error  

Science Conference Proceedings (OSTI)

A restricted statistical correction (RSC) approach is introduced to assess the sources of error in general circulation models (GCMs). RSC models short-term forecast error by considering linear transformations of the GCM's forcing terms, which ...

Siegfried Schubert; Yehui Chang

1996-02-01T23:59:59.000Z

40

Integration of regional to outcrop digital data: 3D visualisation of multi-scale geological models  

Science Conference Proceedings (OSTI)

Multi-scale geological models contain three-dimensional, spatially referenced data, typically spanning at least six orders of magnitude from outcrop to regional scale. A large number of different geological and geophysical data sources can be combined ... Keywords: Digital geological mapping, Immersive visualisation, Terrestrial laser-scanning, User interaction, Virtual outcrop models

R. R. Jones; K. J. W. McCaffrey; P. Clegg; R. W. Wilson; N. S. Holliman; R. E. Holdsworth; J. Imber; S. Waggott

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Temperature Trends in the NARCCAP Regional Climate Models  

Science Conference Proceedings (OSTI)

The skill of six regional climate models (RCMs) in reproducing short-term (24-yr), observed, near-surface temperature trends when driven by reanalysis is examined. The RCMs are part of the North American Regional Climate Change Assessment Program (...

Melissa S. Bukovsky

2012-06-01T23:59:59.000Z

42

Regional Short-Term Energy Model (RSTEM) Overview  

Reports and Publications (EIA)

The Regional Short-Term Energy Model (RSTEM) utilizes estimated econometric relationships for demand, inventories and prices to forecast energy market outcomes across key sectors and selected regions throughout the United States.

Information Center

2009-04-16T23:59:59.000Z

43

A Regional Model Study of Synoptic Features over West Africa  

Science Conference Proceedings (OSTI)

Synoptic weather features over West Africa were studied in simulations by the regional simulation model (RM) at the NASA Goddard Institute for Space Studies. These pioneering simulations represent the beginning of an effort to adapt regional ...

Leonard M. Druyan; Matthew Fulakeza; Patrick Lonergan; Mahaman Saloum

2001-06-01T23:59:59.000Z

44

Nuisance Source Population Modeling for Radiation Detection System Analysis  

SciTech Connect

A major challenge facing the prospective deployment of radiation detection systems for homeland security applications is the discrimination of radiological or nuclear 'threat sources' from radioactive, but benign, 'nuisance sources'. Common examples of such nuisance sources include naturally occurring radioactive material (NORM), medical patients who have received radioactive drugs for either diagnostics or treatment, and industrial sources. A sensitive detector that cannot distinguish between 'threat' and 'benign' classes will generate false positives which, if sufficiently frequent, will preclude it from being operationally deployed. In this report, we describe a first-principles physics-based modeling approach that is used to approximate the physical properties and corresponding gamma ray spectral signatures of real nuisance sources. Specific models are proposed for the three nuisance source classes - NORM, medical and industrial. The models can be validated against measured data - that is, energy spectra generated with the model can be compared to actual nuisance source data. We show by example how this is done for NORM and medical sources, using data sets obtained from spectroscopic detector deployments for cargo container screening and urban area traffic screening, respectively. In addition to capturing the range of radioactive signatures of individual nuisance sources, a nuisance source population model must generate sources with a frequency of occurrence consistent with that found in actual movement of goods and people. Measured radiation detection data can indicate these frequencies, but, at present, such data are available only for a very limited set of locations and time periods. In this report, we make more general estimates of frequencies for NORM and medical sources using a range of data sources such as shipping manifests and medical treatment statistics. We also identify potential data sources for industrial source frequencies, but leave the task of estimating these frequencies for future work. Modeling of nuisance source populations is only useful if it helps in understanding detector system performance in real operational environments. Examples of previous studies in which nuisance source models played a key role are briefly discussed. These include screening of in-bound urban traffic and monitoring of shipping containers in transit to U.S. ports.

Sokkappa, P; Lange, D; Nelson, K; Wheeler, R

2009-10-05T23:59:59.000Z

45

Regional Changes in Wind Energy Potential over Europe Using Regional Climate Model Ensemble Projections  

Science Conference Proceedings (OSTI)

The impact of climate change on wind power generation potentials over Europe is investigated by considering ensemble projections from two regional climate models (RCMs) driven by a global climate model (GCM). Wind energy density and its ...

Hanna Hueging; Rabea Haas; Kai Born; Daniela Jacob; Joaquim G. Pinto

2013-04-01T23:59:59.000Z

46

NREL: Regional Energy Deployment System (ReEDS) Model - Publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Regional Energy Deployment System (ReEDS) Model Energy Analysis ReEDS Regional Energy Deployment System Model Regional Energy Deployment System (ReEDS) Model Energy Analysis ReEDS Regional Energy Deployment System Model Search More Search Options Site Map Printable Version Publications The following are publications - including technical reports, journal articles, conference papers, and posters - focusing on the Wind Deployment System (WinDS) and Regional Energy Deployment System (ReEDS) models. Technical Reports Eurek, K.; Denholm, P.; Margolis, R.; Mowers, M. (2013). Sensitivity of Utility-Scale Solar Deployment Projections in the SunShot Vision Study to Market and Performance Assumptions. 55 pp.; NREL Report No. TP-6A20-55836. Martinez, A.; Eurek, K.; Mai, T.; Perry, A. (2013). Integrated Canada-U.S. Power Sector Modeling with the Regional Energy Deployment System (ReEDS).

47

Source to tap urban water cycle modelling  

Science Conference Proceedings (OSTI)

The continuous expansion of urban areas is associated with increased water demand, both for domestic and non-domestic uses. To cover this additional demand, centralised infrastructure, such as water supply and distribution networks tend to become more ... Keywords: Metabolism models, Optimisation, Urban water cycle, Water demand management

Evangelos Rozos; Christos Makropoulos

2013-03-01T23:59:59.000Z

48

Regional Wave Field Modeling and Array Effects  

NLE Websites -- All DOE Office Websites (Extended Search)

Array with Hs 7.58 m, Tp 2.22 s and DSPR 4. WEC Farm Modeling: WEC Energy Sink Definition WEC Energy Sink Definition * Currently WECs modeled in SWAN as constant...

49

Mathematical Modeling for Side-Blow Combustion Region in Iron ...  

Science Conference Proceedings (OSTI)

Presentation Title, Mathematical Modeling for Side-Blow Combustion Region in Iron Bath Reactor with H2-C Mixture Reduction. Author(s), Bo Zhang, Hong Xin.

50

Modeling-Computer Simulations At Northern Basin & Range Region...  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Northern Basin & Range Region (Blackwell, Et Al., 2003) Exploration...

51

Modeling-Computer Simulations At Nw Basin & Range Region (Pritchett...  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit History Facebook icon Twitter icon Modeling-Computer Simulations At Nw Basin & Range Region (Pritchett, 2004) Jump to: navigation, search...

52

A multi-agent model of several economic regions  

Science Conference Proceedings (OSTI)

This paper presents Lagom regiO: a multi-agent model of several growing economic areas in interaction. The model is part of the Lagom model family: economic multi-agent models developed to make steps toward understanding equilibrium selection and identifying ... Keywords: Economic regions, Emissions, Growing economy, Multi-agent model

Sarah Wolf, Steffen FüRst, Antoine Mandel, Wiebke Lass, Daniel Lincke, Federico Pablo-Martí, Carlo Jaeger

2013-06-01T23:59:59.000Z

53

Computer modeling of the Schottky electron source  

Science Conference Proceedings (OSTI)

A computer modeling program that is able to imitate the polyhedral shape of the ZrO/W(100) Schottky cathode is used to compute emission parameters such as the electric field distribution and reduced brightness Br for the various observed end form shapes. This program includes the electron–electron interactions in the beam and their effect on Br. A relationship between the axial field factor ??=?F/Ve and the axial lens factor K?=?(I?/J)1/2 (where F

Lynwood W. Swanson; Gregory A. Schwind; Sean M. Kellogg; Kun Liu

2012-01-01T23:59:59.000Z

54

The Role of Mesoscale Eddies in the Source Regions of the Agulhas Current  

Science Conference Proceedings (OSTI)

A primitive equation model to study the dynamics of the Agulhas system has been developed. The model domain covers the South Atlantic and the south Indian Ocean with a resolution of ?° in the Agulhas region while coarser outside. It is driven by ...

Arne Biastoch; Wolfgang Krauss

1999-09-01T23:59:59.000Z

55

Source- and Age-Resolved Mechanistic Air Quality Models: Model Development and Application in Southeast Texas  

E-Print Network (OSTI)

Ozone (O3) and particulate matter (PM) existing in the atmosphere have adverse effects to human and environment. Southeast Texas experiences high O3 and PM events due to special meteorological conditions and high emission rates of volatile organic compounds (VOCs) and nitrogen oxides (NOx). Quantitative knowledge of the contributions of different emissions sources to O3 and PM is helpful to better understand their formation mechanisms and develop effective control strategies. Tagged reactive tracer techniques are developed and coupled into two chemical transport models (UCD/CIT model and CMAQ) to conduct source apportionment of O3, primary PM, secondary inorganic PM, and secondary organic aerosol (SOA) and aging distribution of elemental carbon (EC) and organic carbon (OC). Ozone (O3) and particulate matter (PM) existing in the atmosphere have adverse effects to human and environment. Southeast Texas experiences high O3 and PM events due to special meteorological conditions and high emission rates of volatile organic compounds (VOCs) and nitrogen oxides (NOx). Quantitative knowledge of the contributions of different emissions sources to O3 and PM is helpful to better understand their formation mechanisms and develop effective control strategies. Tagged reactive tracer techniques are developed and coupled into two chemical transport models (UCD/CIT model and CMAQ) to conduct source apportionment of O3, primary PM, secondary inorganic PM, and secondary organic aerosol (SOA) and aging distribution of elemental carbon (EC) and organic carbon (OC). Models successfully reproduce the concentrations of gas phase and PM phase species. Vehicles, natural gas, industries, and coal combustion are important O3 sources. Upwind sources have non-negligible influences (20-50%) on daytime O3, indicating that regional NOx emission controls are necessary to reduce O3 in Southeast Texas. EC is mainly from diesel engines while majority of primary OC is from internal combustion engines and industrial sources. Open burning, road dust, internal combustion engines and industries are the major sources of primary PM2.5. Wildfire dominates primary PM near fire locations. Over 80% of sulfate is produced in upwind areas and coal combustion contributes most. Ammonium ion is mainly from agriculture sources. The SOA peak values can be better predicted when the emissions are adjusted by a factor of 2. 20% of the total SOA is due to anthropogenic sources. Solvent and gasoline engines are the major sources. Oligomers from biogenic SOA account for 30-58% of the total SOA, indicating that long range transport is important. PAHs from anthropogenic sources can produce 4% of total anthropogenic SOA. Wild fire, vehicles, solvent and industries are the major sources. EC and OC emitted within 0-3 hours contribute approximately 70-90% in urban Houston and about 20-40% in rural areas. Significant diurnal variations in the relative contributions to EC are predicted. Fresh particles concentrations are high at morning and early evening. The concentrations of EC and OC that spend more than 9 hours in the air are low over land but almost accounts for 100% of the total EC and OC over the ocean.

Zhang, Hongliang

2012-05-01T23:59:59.000Z

56

California Wintertime Precipitation Bias in Regional and Global Climate Models  

Science Conference Proceedings (OSTI)

In this paper, wintertime precipitation from a variety of observational datasets, regional climate models (RCMs), and general circulation models (GCMs) is averaged over the state of California and compared. Several averaging methodologies are ...

Peter Caldwell

2010-10-01T23:59:59.000Z

57

A Bayesian Forecast Model of Australian Region Tropical Cyclone Formation  

Science Conference Proceedings (OSTI)

A new and potentially skillful seasonal forecast model of tropical cyclone formation [tropical cyclogenesis (TCG)] is developed for the Australian region. The model is based on Poisson regression using the Bayesian approach. Predictor combinations ...

Angelika Werner; Neil J. Holbrook

2011-12-01T23:59:59.000Z

58

Modeling-Computer Simulations At Nw Basin & Range Region (Blackwell, Et  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Modeling-Computer Simulations At Nw Basin & Range Region (Blackwell, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nw Basin & Range Region (Blackwell, Et Al., 2003) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Developed natural state mass and energy transport fluid flow models of generic Basin and Range systems based on Dixie Valley data that help to

59

Major models and data sources for residential and commercial sector energy conservation analysis. Final report  

SciTech Connect

Major models and data sources are reviewed that can be used for energy-conservation analysis in the residential and commercial sectors to provide an introduction to the information that can or is available to DOE in order to further its efforts in analyzing and quantifying their policy and program requirements. Models and data sources examined in the residential sector are: ORNL Residential Energy Model; BECOM; NEPOOL; MATH/CHRDS; NIECS; Energy Consumption Data Base: Household Sector; Patterns of Energy Use by Electrical Appliances Data Base; Annual Housing Survey; 1970 Census of Housing; AIA Research Corporation Data Base; RECS; Solar Market Development Model; and ORNL Buildings Energy Use Data Book. Models and data sources examined in the commercial sector are: ORNL Commercial Sector Model of Energy Demand; BECOM; NEPOOL; Energy Consumption Data Base: Commercial Sector; F.W. Dodge Data Base; NFIB Energy Report for Small Businesses; ADL Commercial Sector Energy Use Data Base; AIA Research Corporation Data Base; Nonresidential Buildings Surveys of Energy Consumption; General Electric Co: Commercial Sector Data Base; The BOMA Commercial Sector Data Base; The Tishman-Syska and Hennessy Data Base; The NEMA Commercial Sector Data Base; ORNL Buildings Energy Use Data Book; and Solar Market Development Model. Purpose; basis for model structure; policy variables and parameters; level of regional, sectoral, and fuels detail; outputs; input requirements; sources of data; computer accessibility and requirements; and a bibliography are provided for each model and data source.

Not Available

1980-09-01T23:59:59.000Z

60

Dispersion modeling of ground-level area sources of particulate  

E-Print Network (OSTI)

The use of dispersion modeling by State Air Pollution hics. Regulatory Agencies (SAPRAS) is increasing. Dispersion modeling provides a quick and efficient means of determining the downwind impact of pollutant release from a source. The SAPRAS are charged with the task of insuring that public exposure levels of these pollutants are less than the standards set by the United States Environmental Protection Agency (US EPA). Estimating the concentration of pollutant at some distance downwind, in most cases the property line, allows that SAPRAS to determine whether or not a source needs to install additional means of control in order to decrease the rate of pollutant release. One set of models approved for regulatory use by the US EPA is Industrial Source Complex (ISC). ISC includes SCREEN: which is a simple screening model with imbedded meteorological data, and ST3 which is a more refined model requiring meteorological data to be provided. ISC models are based on the concept of Gaussian dispersion. The concentration determined using the ISC models are a result of determining concentrations based on a single wind speed and direction for a one hour time period. The first step in the formulation of a new model was to incorporate smaller time periods into the concentration predictions, in order to account for variation or wind speed and direction within an hour period. For ground-level sources, the vertical distribution involves mathematically dispersing the pollutant underground, then reflecting it back up. The next step taken in the new model development was the incorporation of a triangular distribution in the Medical plane. The triangular distribution is entirely above ground. Once the new model was formulated, a sample modeling procedure was performed in order to compare the behavior of the new model as compared to ISC ST3. Examination of the characteristics of the two models, the meteorological data, and the output from the modeling procedures allows the comparison and contrast of the behavioral characteristics of the two models.

Fritz, Bradley Keith

1998-01-01T23:59:59.000Z

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61

Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) |  

Open Energy Info (EERE)

Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Assembling Crustal Geophysical Data for Geothermal Exploration in the Great Basin, Louie and Coolbaugh. We have compiled velocity information from sources in the literature, results of previous seismic experiments and earthquake-monitoring projects, and data donated from mining, geothermal, and petroleum companies. We also collected (May 2002 and August 2004) two

62

Bias Correction of Regional Climate Model Simulations in a Region of Complex Orography  

Science Conference Proceedings (OSTI)

This study presents a method to correct regional climate model (RCM) outputs using observations from automatic weather stations. The correction applies a nonlinear procedure, which recently appeared in the literature, to both precipitation and ...

Roger Bordoy; Paolo Burlando

2013-01-01T23:59:59.000Z

63

Models of radiofrequency coupling for negative ion sources  

SciTech Connect

Radiofrequency heating for ICP (inductively coupled plasma) ion sources depends on the source operating pressure, the presence or absence of a Faraday shield, the driver coil geometry, the frequency used, and the magnetic field configuration: in negative ion source a magnetic filter seems necessary for H{sup -} survival. The result of single particle simulations showing the possibility of electron acceleration in the preglow regime and for reasonable driver chamber radius (15 cm) is reported, also as a function of the static external magnetic field. An effective plasma conductivity, depending not only from electron density, temperature, and rf field but also on static magnetic field is here presented and compared to previous models. Use of this conductivity and of multiphysics tools for a plasma transport and heating model is shown and discussed for a small source.

Cavenago, M.; Petrenko, S. [INFN-LNL, viale dell'Universita n.2, 35020 Legnaro (Italy)

2012-02-15T23:59:59.000Z

64

Figure 6. Electricity Market Model Supply Regions  

E-Print Network (OSTI)

The NEMS Electricity Market Module (EMM) represents the capacity planning, dispatching, and pricing of electricity. It is composed of four submodules—electricity capacity planning, electricity fuel dispatching, load and demand electricity, and electricity finance and pricing. It includes nonutility capacity and generation, and electricity transmission and trade. A detailed description of the EMM is provided in the EIA publication, Electricity Market Module of the National Energy Modeling System 2010, DOE/EIA-M068(2010). Based on fuel prices and electricity demands provided by the other modules of the NEMS, the EMM determines the most economical way to supply electricity, within environmental and operational constraints. There are assumptions about the operations of the electricity sector and the costs of various options in each of the EMM submodules. This section describes the model parameters and assumptions used in EMM. It includes a discussion of legislation and regulations that are incorporated in EMM as well as information about the climate change action plan. The various electricity and technology cases are also described.

unknown authors

2010-01-01T23:59:59.000Z

65

Implementation of Prognostic Cloud Scheme for a Regional Spectral Model  

Science Conference Proceedings (OSTI)

The purpose of this study is to develop a precipitation physics package for the National Centers for Environmental Prediction (NCEP) Regional Spectral Model (RSM) designed to improve the skill of precipitation forecasts. The package incorporates ...

Song-You Hong; Hann-Ming Henry Juang; Qingyun Zhao

1998-10-01T23:59:59.000Z

66

Regional Models: Emerging Research Tools for Synoptic Meteorologists  

Science Conference Proceedings (OSTI)

Although the development of limited-area, regional-scale numerical-weather prediction models has been driven largely by the practical need to improve quantitative precipitation forecasts, a related motivation has been scientific interest in ...

Daniel Keyser; Louis W. Uccellini

1987-04-01T23:59:59.000Z

67

Regional Sources of Nitrous Oxide over the United States: Seasonal Variation and Spatial Distribution  

SciTech Connect

This paper presents top-down constraints on the magnitude, spatial distribution, and seasonality of nitrous oxide (N{sub 2}O) emissions over the central United States. We analyze data from tall towers in 2004 and 2008 using a high resolution Lagrangian particle dispersion model paired with both geostatistical and Bayesian inversions. Our results indicate peak N{sub 2}O emissions in June with a strong seasonal cycle. The spatial distribution of sources closely mirrors data on fertilizer application with particularly large N{sub 2}O sources over the US Cornbelt. Existing inventories for N{sub 2}O predict emissions that differ substantially from the inverse model results in both seasonal cycle and magnitude. We estimate a total annual N{sub 2}O budget over the central US of 0.9-1.2 TgN/yr and an extrapolated budget for the entire US and Canada of 2.1-2.6 TgN/yr. By this estimate, the US and Canada account for 12-15% of the total global N{sub 2}O source or 32-39% of the global anthropogenic source as reported by the Intergovernmental Panel on Climate Change in 2007.

Miller, S. M.; Kort, E. A.; Hirsch, A. I.; Dlugokencky, E. J.; Andrews, A. E.; Xu, X.; Tian, H.; Nehrkorn, T.; Eluszkiewicz, J.; Michalak, A. M.; Wofsy, S. C.

2012-01-01T23:59:59.000Z

68

Computational modeling study of the radial line slot antenna microwave plasma source with comparisons to experiments  

SciTech Connect

The radial line slot antenna plasma source is a high-density microwave plasma source comprising a high electron temperature source region within the plasma skin depth from a coupling window and low electron temperature diffusion region far from the window. The plasma is typically comprised of inert gases like argon and mixtures of halogen or fluorocarbon gases for etching. Following the experimental study of Tian et al.[J. Vac. Sci. Technol. A 24, 1421 (2006)], a two-dimensional computational model is used to describe the essential features of the source. A high density argon plasma is described using the quasi-neutral approximation and coupled to a frequency-domain electromagnetic wave solver to describe the plasma-microwave interactions in the source. The plasma is described using a multispecies plasma chemistry mechanism developed specifically for microwave excitation conditions. The plasma is nonlocal by nature with locations of peak power deposition and peak plasma density being very different. The spatial distribution of microwave power coupling depends on whether the plasma is under- or over-dense and is described well by the model. The model predicts the experimentally observed low-order diffusion mode radial plasma profiles. The trends of spatial profiles of electron density and electron temperature over a wide range of power and pressure conditions compare well with experimental results.

Raja, Laxminarayan L. [Department of Aerospace Engineering and Engineering Mechanics, University of Texas at Austin, Austin, Texas 78712 (United States); Mahadevan, Shankar [Esgee Technologies Inc., 1301 S. Capital of Texas Hwy. Suite B-122, Austin, Texas 78746 (United States); Ventzek, Peter L. G.; Yoshikawa, Jun [Tokyo Electron Ltd., Akasaka Biz Tower, 3-1 Akasaka 5-chome, Minato-ku, Tokyo 107-6325 (Japan)

2013-05-15T23:59:59.000Z

69

Selection of models to calculate the LLW source term  

Science Conference Proceedings (OSTI)

Performance assessment of a LLW disposal facility begins with an estimation of the rate at which radionuclides migrate out of the facility (i.e., the source term). The focus of this work is to develop a methodology for calculating the source term. In general, the source term is influenced by the radionuclide inventory, the wasteforms and containers used to dispose of the inventory, and the physical processes that lead to release from the facility (fluid flow, container degradation, wasteform leaching, and radionuclide transport). In turn, many of these physical processes are influenced by the design of the disposal facility (e.g., infiltration of water). The complexity of the problem and the absence of appropriate data prevent development of an entirely mechanistic representation of radionuclide release from a disposal facility. Typically, a number of assumptions, based on knowledge of the disposal system, are used to simplify the problem. This document provides a brief overview of disposal practices and reviews existing source term models as background for selecting appropriate models for estimating the source term. The selection rationale and the mathematical details of the models are presented. Finally, guidance is presented for combining the inventory data with appropriate mechanisms describing release from the disposal facility. 44 refs., 6 figs., 1 tab.

Sullivan, T.M. (Brookhaven National Lab., Upton, NY (United States))

1991-10-01T23:59:59.000Z

70

Modeling and analysis of hydrogen detonation events in the Advanced Neutron Source reactor containment  

DOE Green Energy (OSTI)

This paper describes salient aspects of the modeling, analyses, and evaluations for hydrogen detonation in selected regions of the Advanced Neutron Source (ANS) containment during hypothetical severe accident conditions. Shock wave generation and transport modeling and analyses were conducted for two stratified configurations in the dome region of the high bay. Principal tools utilized for these purposes were the CTH and CET89 computer codes. Dynamic pressure loading functions were generated for key locations and used for evaluating structural response behavior for which a finite-element model was developed using the ANSYS code. For the range of conditions analyzed in the two critical dome regions, it was revealed that the ANS containment would be able to withstand detonation loads without failure.

Taleyarkhan, R.P.; Georgevich, V.; Kim, S.H.; Valenti, S.N.; Simpson, D.B. [Oak Ridge National Lab., TN (United States); Sawruk, W. [Gilbert/Commonwealth, Inc., Reading, PA (United States)

1994-07-01T23:59:59.000Z

71

Modeling-Computer Simulations At Yellowstone Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Laney, 2005) Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Yellowstone Region (Laney, 2005) Exploration Activity Details Location Yellowstone Caldera Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown Notes Localized Strain as a Discriminator of Hidden Geothermal Systems, Vasco and Foxall, 2005. Recent work has focused on (1) collaborating with Alessandro Ferretti to use Permanent Scatterer (PS) InSAR data to infer strain at depth, (2) working with Lane Johnson to develop a dynamic faulting model, and (3) acquiring InSAR data for the region surrounding the Dixie Valley fault zone in collaboration with Dr. William Foxall of LLNL. The InSAR data

72

Modeling-Computer Simulations At Central Nevada Seismic Zone Region  

Open Energy Info (EERE)

Central Nevada Seismic Zone Region Central Nevada Seismic Zone Region (Blackwell, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Central Nevada Seismic Zone Region (Blackwell, Et Al., 2003) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Developed natural state mass and energy transport fluid flow models of generic Basin and Range systems based on Dixie Valley data that help to understand the nature of large scale constraints on the location and characteristics of the geothermal systems References D. D. Blackwell, K. W. Wisian, M. C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis And Structure Of

73

A hybrid source apportionment model integrating measured data and air quality model results - article no. D07301  

SciTech Connect

The Big Bend Regional Aerosol and Visibility (BRAVO) study was an intensive air quality study designed to understand the causes of haze in Big Bend National Park. Daily speciated fine aerosols were measured from July through October 1999 at 37 sites located mostly in Texas. In support of BRAVO, two chemical transport models (CTMs) were used to apportion particulate sulfate at Big Bend and other sites in Texas to sources in the eastern and western United States, Texas, Mexico, and the Carbon I and II coal-fired power plants, located 225 km southeast of Big Bend in Mexico. Analysis of the CTM source attribution results and comparison to results from receptor models revealed systematic biases. To reduce the multiplicative biases, a hybrid source apportionment model, based on inverse modeling, was developed that adjusted the initial CTM source contributions so the modeled sulfate concentrations optimally fit the measured data, resulting in refined daily source contributions. The method was tested using synthetic data and successfully reduced source attribution biases. The refined sulfate source attribution results reduced the initial eastern U.S. contribution to Big Bend, averaged over the BRAVO study period, from about 40% to about 30%, while Mexico's contribution increased from 24 - 32% about 40%. The contribution from the Carbon facility increased from similar to 14% to over 20%. The increase in Mexico's contribution is consistent with more recent SO{sub 2} emissions estimates that indicate that the BRAVO Mexican SO{sub 2} emissions were underestimated. Source attribution results for other monitoring sites in west Texas were similar to results at Big Bend.

Schichtel, B.A.; Malm, W.C.; Gebhart, K.A.; Barna, M.G.; Knipping, E.M. [Colorado State University, Ft. Collins, CO (United States)

2006-04-04T23:59:59.000Z

74

A Stochastic Methodology for Regional Wind-Field Modeling  

Science Conference Proceedings (OSTI)

Three-dimensional, regional scale (?1000 km) air-quality simulation models require hourly inputs of U and V wind components for each vertical layer of the model and for each grid cell in the horizontal. The standard North American meteorological ...

Kenneth L. Schere; Carlie J. Coats

1992-12-01T23:59:59.000Z

75

Regional Climate Model Projections for the State of Washington  

SciTech Connect

Global climate models do not have sufficient spatial resolution to represent the atmospheric and land surface processes that determine the unique regional heterogeneity of the climate of the State of Washington. If future large-scale weather patterns interact differently with the local terrain and coastlines than current weather patterns, local changes in temperature and precipitation could be quite different from the coarse-scale changes projected by global models. Regional climate models explicitly simulate the interactions between the large-scale weather patterns simulated by a global model and the local terrain. We have performed two 100-year climate simulations using the Weather and Research Forecasting (WRF) model developed at the National Center for Atmospheric Research (NCAR). One simulation is forced by the NCAR Community Climate System Model version 3 (CCSM3) and the second is forced by a simulation of the Max Plank Institute, Hamburg, global model (ECHAM5). The mesoscale simulations produce regional changes in snow cover, cloudiness, and circulation patterns associated with interactions between the large-scale climate change and the regional topography and land-water contrasts. These changes substantially alter the temperature and precipitation trends over the region relative to the global model result or statistical downscaling. To illustrate this effect, we analyze the changes from the current climate (1970-1999) to the mid 21st century (2030-2059). Changes in seasonal-mean temperature, precipitation, and snowpack are presented. Several climatological indices of extreme daily weather are also presented: precipitation intensity, fraction of precipitation occurring in extreme daily events, heat wave frequency, growing season length, and frequency of warm nights. Despite somewhat different changes in seasonal precipitation and temperature from the two regional simulations, consistent results for changes in snowpack and extreme precipitation are found in both simulations.

Salathe, E.; Leung, Lai-Yung R.; Qian, Yun; Zhang, Yongxin

2010-05-05T23:59:59.000Z

76

A Model for the Origin of High Density in Loop-top X-ray Sources  

E-Print Network (OSTI)

Super-hot looptop sources, detected in some large solar flares, are compact sources of HXR emission with spectra matching thermal electron populations exceeding 30 megakelvins. High observed emission measure, as well as inference of electron thermalization within the small source region, both provide evidence of high densities at the looptop; typically more than an order of magnitude above ambient. Where some investigators have suggested such density enhancement results from a rapid enhancement in the magnetic field strength, we propose an alternative model, based on Petschek reconnection, whereby looptop plasma is heated and compressed by slow magnetosonic shocks generated self-consistently through flux retraction following reconnection. Under steady conditions such shocks can enhance density by no more than a factor of four. These steady shock relations (Rankine-Hugoniot relations) turn out to be inapplicable to Petschek's model owing to transient effects of thermal conduction. The actual density enhancemen...

Longcope, D W

2011-01-01T23:59:59.000Z

77

Regional climate change scenarios over the United States produced with a nested regional climate model  

Science Conference Proceedings (OSTI)

Two continuous 31/2-year-long climate simulation over the continental United States are discussed, one of present-day conditions and one for conditions under double carbon dioxide concentration, conducted with a limited area model (LAM) nested in a general circulation model (GCM). The models used are a version of the NCAR Community Climate Model (CCM) at rhomboidal 15 spectral resolution and the climate version of the NCAR/Penn State mesoscale model (MM4) at 60-km gridpoint spacing. For present-day conditions the model temperatures are within 1[degrees]-2[degrees]C of observations except over the Great Lakes region, where temperature is overpredicted. The CCM overpredicts precipitation throughout the continental United States (overall by about 60%) and especially over the West (by up to 300%). The nested MM4 overpredicts precipitation over the West but underpredicts it over the eastern United States. In addition, it produces a large amount of topographically and lake-induced sub-GCM grid-scale detail that compares well with available high-resolution climate data. Overall, the nested MM4 reproduces observed spatial and seasonal precipitation patterns better than the driving CCM. Doubled carbon dioxide-induced temperature change scenarios produced by the two models generally differ by less than several tenths of a degree except over the Great Lakes region where, because of the presence of the lakes in the nested model, the two model scenarios differ by more than one degree. Conversely, precipitation change scenarios from the two model simulations can locally differ in magnitude, sign, spatial, and seasonal detail. These differences are associated with topographical features in the MM4, such as the presence of steep coastal ranges in the western United States. This work illustrates the feasibility of the use of the nested modeling technique for long-term regional climate simulation. 43 refs., 19 figs., 6 tabs.

Giorgi, F.; Brodeur, C.S.; Bates, G.T. (National Center for Atmospheric Research, Boulder, CO (United States))

1994-03-01T23:59:59.000Z

78

Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Demand for Electricity;  

U.S. Energy Information Administration (EIA) Indexed Site

7 End Uses of Fuel Consumption, 2006; 7 End Uses of Fuel Consumption, 2006; Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Demand for Electricity; Unit: Physical Units or Btu. Distillate Coal Fuel Oil (excluding Coal Net Demand Residual and Natural Gas(c) LPG and Coke and Breeze) for Electricity(a) Fuel Oil Diesel Fuel(b) (billion NGL(d) (million End Use (million kWh) (million bbl) (million bbl) cu ft) (million bbl) short tons) Total United States TOTAL FUEL CONSUMPTION 977,338 40 22 5,357 21 46 Indirect Uses-Boiler Fuel 24,584 21 4 2,059 2 25 Conventional Boiler Use 24,584 11 3 1,245 2 6 CHP and/or Cogeneration Process 0 10 1 814 * 19 Direct Uses-Total Process 773,574 10 9 2,709 10 19 Process Heating

79

Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Electricity;  

U.S. Energy Information Administration (EIA) Indexed Site

5 End Uses of Fuel Consumption, 2006; 5 End Uses of Fuel Consumption, 2006; Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Electricity; Unit: Physical Units or Btu. Distillate Coal Fuel Oil (excluding Coal Net Residual and Natural Gas(c) LPG and Coke and Breeze) Total Electricity(a) Fuel Oil Diesel Fuel(b) (billion NGL(d) (million Other(e) End Use (trillion Btu) (million kWh) (million bbl) (million bbl) cu ft) (million bbl) short tons) (trillion Btu) Total United States TOTAL FUEL CONSUMPTION 15,658 835,382 40 22 5,357 21 46 5,820 Indirect Uses-Boiler Fuel -- 12,109 21 4 2,059 2 25 -- Conventional Boiler Use 12,109 11 3 1,245 2 6 CHP and/or Cogeneration Process 0 10 1 814 * 19 Direct Uses-Total Process

80

Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Electricity;  

U.S. Energy Information Administration (EIA) Indexed Site

6 End Uses of Fuel Consumption, 2006; 6 End Uses of Fuel Consumption, 2006; Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Electricity; Unit: Trillion Btu. Distillate Fuel Oil Coal Net Residual and LPG and (excluding Coal End Use Total Electricity(a) Fuel Oil Diesel Fuel(b) Natural Gas(c) NGL(d) Coke and Breeze) Other(e) Total United States TOTAL FUEL CONSUMPTION 15,658 2,850 251 129 5,512 79 1,016 5,820 Indirect Uses-Boiler Fue -- 41 133 23 2,119 8 547 -- Conventional Boiler Use 41 71 17 1,281 8 129 CHP and/or Cogeneration Process 0 62 6 838 1 417 Direct Uses-Total Process -- 2,244 62 52 2,788 39 412 -- Process Heating -- 346 59 19 2,487 32 345 -- Process Cooling and Refrigeration -- 206 * 1 32 * * -- Machine Drive

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Demand for Electricity;  

U.S. Energy Information Administration (EIA) Indexed Site

Next MECS will be conducted in 2010 Table 5.8 End Uses of Fuel Consumption, 2006; Level: National and Regional Data; Row: End Uses; Column: Energy Sources, including Net Demand for Electricity; Unit: Trillion Btu. Distillate Fuel Oil Coal Net Demand Residual and LPG and (excluding Coal End Use for Electricity(a) Fuel Oil Diesel Fuel(b) Natural Gas(c) NGL(d) Coke and Breeze) Total United States TOTAL FUEL CONSUMPTION 3,335 251 129 5,512 79 1,016 Indirect Uses-Boiler Fuel 84 133 23 2,119 8 547 Conventional Boiler Use 84 71 17 1,281 8 129 CHP and/or Cogeneration Process 0 62 6 838 1 417 Direct Uses-Total Process 2,639 62 52 2,788 39 412 Process Heating 379 59 19 2,487 32 345 Process Cooling and Refrigeration

82

Short-Term Energy Outlook Model Documentation: Regional Residential Heating Oil Price Model  

Reports and Publications (EIA)

The regional residential heating oil price module of the Short-Term Energy Outlook (STEO) model is designed to provide residential retail price forecasts for the 4 census regions: Northeast, South, Midwest, and West.

Information Center

2009-11-09T23:59:59.000Z

83

Short-Term Energy Outlook Model Documentation: Regional Residential Propane Price Model  

Reports and Publications (EIA)

The regional residential propane price module of the Short-Term Energy Outlook (STEO) model is designed to provide residential retail price forecasts for the 4 census regions: Northeast, South, Midwest, and West.

Information Center

2009-11-09T23:59:59.000Z

84

Modelling Of Downhole Seismic Sources I: Literature Review, Review Of Fundamentals, Impulsive Point Source In A Borehole  

E-Print Network (OSTI)

This paper represents the first of a two paper sequence comprising a multi-faceted introduction to the numerical and analytical modelling of seismic sources in a borehole.

Meredith, J. A.

1990-01-01T23:59:59.000Z

85

Potential bias of model projected greenhouse warming in irrigated regions  

SciTech Connect

Atmospheric general circulation models (GCMs) used to project climate responses to increased CO{sub 2} generally omit irrigation of agricultural land. Using the NCAR CAM3 GCM coupled to a slab-ocean model, we find that inclusion of an extreme irrigation scenario has a small effect on the simulated temperature and precipitation response to doubled CO{sub 2} in most regions, but reduced warming by as much as 1 C in some agricultural regions, such as Europe and India. This interaction between CO{sub 2} and irrigation occurs in cases where agriculture is a major fraction of the land surface and where, in the absence of irrigation, soil moisture declines are projected to provide a positive feedback to temperature change. The reduction of warming is less than 25% of the temperature increase modeled for doubled CO{sub 2} in most regions; thus greenhouse warming will still be dominant. However, the results indicate that land use interactions may be an important component of climate change uncertainty in some agricultural regions. While irrigated lands comprise only {approx}2% of the land surface, they contribute over 40% of global food production. Climate changes in these regions are therefore particularly important to society despite their relatively small contribution to average global climate.

Lobell, D; Bala, G; Bonfils, C; Duffy, P

2006-04-27T23:59:59.000Z

86

Forecasting the Skill of a Regional Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

It is demonstrated that the skill of short-term regional numerical forecasts can be predicted on a day-to-day basis. This was achieved by using a statistical regression scheme with the model forecast errors (MFE) as the predictands and the ...

L. M. Leslie; K. Fraedrich; T. J. Glowacki

1989-03-01T23:59:59.000Z

87

The Climatological Skill of a Regional Model over Complex Terrain  

Science Conference Proceedings (OSTI)

As part of an ongoing study of the regional climate and hydrology of the southwestern United States, in this paper we investigate the systematic biases of two versions of the PSU/NCAR mesoscale model (MM4). These are a standard version and one ...

Filippo Giorgi; Gary T. Bates

1989-11-01T23:59:59.000Z

88

Can Regional Climate Models Represent the Indian Monsoon?  

Science Conference Proceedings (OSTI)

The ability of four regional climate models (RCMs) to represent the Indian monsoon was verified in a consistent framework for the period 1981–2000 using the 45-yr European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40) as ...

Philippe Lucas-Picher; Jens H. Christensen; Fahad Saeed; Pankaj Kumar; Shakeel Asharaf; Bodo Ahrens; Andrew J. Wiltshire; Daniela Jacob; Stefan Hagemann

2011-10-01T23:59:59.000Z

89

Reference wind farm selection for regional wind power prediction models  

E-Print Network (OSTI)

1 Reference wind farm selection for regional wind power prediction models Nils Siebert George.siebert@ensmp.fr, georges.kariniotakis@ensmp.fr Abstract Short-term wind power forecasting is recognized today as a major requirement for a secure and economic integration of wind generation in power systems. This paper deals

Paris-Sud XI, Université de

90

Sensitivity of numerical dispersion modeling to explosive source parameters  

Science Conference Proceedings (OSTI)

The calculation of downwind concentrations from non-traditional sources, such as explosions, provides unique challenges to dispersion models. The US Department of Energy has assigned the Atmospheric Release Advisory Capability (ARAC) at the Lawrence Livermore National Laboratory (LLNL) the task of estimating the impact of accidental radiological releases to the atmosphere anywhere in the world. Our experience includes responses to over 25 incidents in the past 16 years, and about 150 exercises a year. Examples of responses to explosive accidents include the 1980 Titan 2 missile fuel explosion near Damascus, Arkansas and the hydrogen gas explosion in the 1986 Chernobyl nuclear power plant accident. Based on judgment and experience, we frequently estimate the source geometry and the amount of toxic material aerosolized as well as its particle size distribution. To expedite our real-time response, we developed some automated algorithms and default assumptions about several potential sources. It is useful to know how well these algorithms perform against real-world measurements and how sensitive our dispersion model is to the potential range of input values. In this paper we present the algorithms we use to simulate explosive events, compare these methods with limited field data measurements, and analyze their sensitivity to input parameters. 14 refs., 7 figs., 2 tabs.

Baskett, R.L. (EG and G Energy Measurements, Inc., Pleasanton, CA (USA)); Cederwall, R.T. (Lawrence Livermore National Lab., CA (USA))

1991-02-13T23:59:59.000Z

91

Effects of rock properties on explosive source modeling: Preliminary results. Los Alamos Source Region Project  

SciTech Connect

The purpose of this study was to investigate possible reasons for unexpectedly low ground motion measurements obtained during some events at the Nevada Test Site. Of particular interest were the unexpected low results obtained for the Mission Cyber event which was the first test conducted in the P-tunnel complex.

Dick, R.D.; Fourney, W.L. [Maryland Univ., College Park, MD (United States). Dept. of Mechanical Engineering

1992-09-01T23:59:59.000Z

92

Modeling Air–Land–Sea Interactions Using the Integrated Regional Model System in Monterey Bay, California  

Science Conference Proceedings (OSTI)

The air–land–sea interaction in the vicinity of Monterey Bay, California, is simulated and investigated using a new Integrated Regional Model System (I-RMS). This new model realistically resolves coastal processes and submesoscale features that ...

Yu-Heng Tseng; Shou-Hung Chien; Jiming Jin; Norman L. Miller

2012-04-01T23:59:59.000Z

93

Trajectory Analysis and Semantic Region Modeling Using A Nonparametric Bayesian Model  

E-Print Network (OSTI)

We propose a novel nonparametric Bayesian model, Dual Hierarchical Dirichlet Processes (Dual-HDP), for trajectory analysis and semantic region modeling in surveillance settings, in an unsupervised way. In our approach, ...

Grimson, Eric

2008-06-24T23:59:59.000Z

94

Regional Climate Models Add Value to Global Model Data: A Review and Selected Examples  

Science Conference Proceedings (OSTI)

An important challenge in current climate modeling is to realistically describe small-scale weather statistics, such as topographic precipitation and coastal wind patterns, or regional phenomena like polar lows. Global climate models simulate atmospheric ...

Frauke Feser; Burkhardt Rockel; Hans von Storch; Jörg Winterfeldt; Matthias Zahn

2011-09-01T23:59:59.000Z

95

Model of the Regional Coupled Earth system (MORCE): Application to process and climate studies in vulnerable regions  

Science Conference Proceedings (OSTI)

The vulnerability of human populations and natural systems and their ability to adapt to extreme events and climate change vary with geographic regions and populations. Regional climate models (RCM), composed by an atmospheric component coupled to a ... Keywords: CORDEX, ChArMeX, Climate modeling, HyMeX, Impact studies, MORCE platform, MerMeX, Mesoscale process, Regional Earth system

Philippe Drobinski; Alesandro Anav; Cindy Lebeaupin Brossier; Guillaume Samson; Marc Stéfanon; Sophie Bastin; Mélika Baklouti; Karine Béranger; Jonathan Beuvier; Romain Bourdallé-Badie; Laure Coquart; Fabio D'Andrea; Nathalie de Noblet-Ducoudré; Frédéric Diaz; Jean-Claude Dutay; Christian Ethe; Marie-Alice Foujols; Dmitry Khvorostyanov; Gurvan Madec; Martial Mancip; Sébastien Masson; Laurent Menut; Julien Palmieri; Jan Polcher; Solène Turquety; Sophie Valcke; Nicolas Viovy

2012-07-01T23:59:59.000Z

96

A model for the ATW target region fluid dynamics  

SciTech Connect

In the Los Alamos National Laboratory's concept for the accelerator transmutation of waste (ATW), a lead-bismuth eutectic has been chosen as a spallation target for the proton beam. Because of the high local heat fluxes anticipated, the target is in liquid form to facilitate heat removal. The upper boundary of the target region is a hard vacuum. The primary purpose of the analysis is to determine the location of the flow boundary based on the target design parameters. This method of analysis should prove to be useful for performing preliminary scoping and design of the ATW target region's fluid dynamics. Eventually, this model should be tested against experimental data.

Rider, W.J.; Cappiello, M.W. (Los Alamos National Lab., NM (United States))

1991-01-01T23:59:59.000Z

97

MODELING AND ANALYSIS OF GLOBAL AND REGIONAL HYDROLOGIC PROCESSES AND APPROPRIATE CONSERVATION OF MOIST ENTROPY  

SciTech Connect

The research supported by DOE funding addressed the fundamental issues of understanding and modeling of hydrologic processes in relation to regional and global climate change. The emphasis of this research effort was on the application of isentropic modeling and analysis to advance the accuracy of the simulation of all aspects of the hydrologic cycle including clouds and thus the climate state regionally and globally. Simulation of atmospheric hydrologic processes by the UW hybrid isentropic coordinate models provided fundamental insight into global monsoonal circulations, and regional energy exchange in relation to the atmospheric hydrologic cycle. Inter-comparison of UW hybrid model simulations with those from the NCAR Community Climate Model and other climate and numerical weather prediction (NWP) models investigated the increased accuracies gained in modeling long-range transport in isentropic coordinates and isolated differences in modeling of the climate state. The inter-comparisons demonstrated advantages in the simulation of the transport of the hydrologic components of the climate system and provided insight into the more general problems of simulating hydrologic processes, aerosols and chemistry for climate. This research demonstrated the viability of the UW isentropic-eta model for long-term integration for climate and climate change studies and documented that no insurmountable barriers exist to simulation of climate utilizing hybrid isentropic coordinate models. The results provide impetus for continued development of hybrid isentropic coordinate models as a means to advance accuracies in the simulation of global and regional climate in relation to transport and the planetary distribution of heat sources and sinks.

Donald Johnson, Todd Schaack

2007-06-08T23:59:59.000Z

98

Regional forecasting with global atmospheric models; Final report  

SciTech Connect

The purpose of the project was to conduct model simulations for past and future climate change with respect to the proposed Yucca Mtn. repository. The authors report on three main topics, one of which is boundary conditions for paleo-hindcast studies. These conditions are necessary for the conduction of three to four model simulations. The boundary conditions have been prepared for future runs. The second topic is (a) comparing the atmospheric general circulation model (GCM) with observations and other GCMs; and (b) development of a better precipitation data base for the Yucca Mtn. region for comparisons with models. These tasks have been completed. The third topic is preliminary assessments of future climate change. Energy balance model (EBM) simulations suggest that the greenhouse effect will likely dominate climate change at Yucca Mtn. for the next 10,000 years. The EBM study should improve rational choice of GCM CO{sub 2} scenarios for future climate change.

Crowley, T.J.; Smith, N.R. [Applied Research Corp., College Station, TX (United States)

1994-05-01T23:59:59.000Z

99

Sources  

NLE Websites -- All DOE Office Websites (Extended Search)

SOURCES Microsoft Corporation. "Gasohol," Microsoft Encarta Online Encyclopedia 2001, http:encarta.msn.com. U.S. Department of Transportation, Federal Highway Administration, A...

100

Modeling-Computer Simulations At Walker-Lane Transitional Zone Region  

Open Energy Info (EERE)

Modeling-Computer Simulations At Walker-Lane Modeling-Computer Simulations At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Assembling Crustal Geophysical Data for Geothermal Exploration in the Great Basin, Louie and Coolbaugh. We have compiled velocity information from sources in the literature, results of previous seismic experiments and earthquake-monitoring projects, and data donated from mining, geothermal, and petroleum companies. We also collected (May 2002 and August 2004) two new crustal refraction profiles across western Nevada and the northern and central Sierra. These sections had not been well characterized previously.

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Regional-Scale Climate Change: Observations and Model Simulations  

SciTech Connect

This collaborative proposal addressed key issues in understanding the Earthâ??s climate system, as highlighted by the U.S. Climate Science Program. The research focused on documenting past climatic changes and on assessing future climatic changes based on suites of global and regional climate models. Geographically, our emphasis was on the mountainous regions of the world, with a particular focus on the Neotropics of Central America and the Hawaiian Islands. Mountain regions are zones where large variations in ecosystems occur due to the strong climate zonation forced by the topography. These areas are particularly susceptible to changes in critical ecological thresholds, and we conducted studies of changes in phonological indicators based on various climatic thresholds.

Raymond S. Bradley; Henry F. Diaz

2010-12-14T23:59:59.000Z

102

"Table A33. Total Quantity of Purchased Energy Sources by Census Region, Census Division,"  

U.S. Energy Information Administration (EIA) Indexed Site

Quantity of Purchased Energy Sources by Census Region, Census Division," Quantity of Purchased Energy Sources by Census Region, Census Division," " and Economic Characteristics of the Establishment, 1994" " (Estimates in Btu or Physical Units)" ,,,,,"Natural",,,"Coke" " ","Total","Electricity","Residual","Distillate","Gas(c)"," ","Coal","and Breeze","Other(d)","RSE" " ","(trillion","(million","Fuel Oil","Fuel Oil(b)","(billion","LPG","(1000 ","(1000","(trillion","Row" "Economic Characteristics(a)","Btu)","kWh)","(1000 bbl)","(1000 bbl)","cu ft)","(1000 bbl)","short tons)","short tons)","Btu)","Factors"

103

A MODEL FOR THE SOURCES OF THE SLOW SOLAR WIND  

SciTech Connect

Models for the origin of the slow solar wind must account for two seemingly contradictory observations: the slow wind has the composition of the closed-field corona, implying that it originates from the continuous opening and closing of flux at the boundary between open and closed field. On the other hand, the slow wind also has large angular width, up to {approx}60{sup 0}, suggesting that its source extends far from the open-closed boundary. We propose a model that can explain both observations. The key idea is that the source of the slow wind at the Sun is a network of narrow (possibly singular) open-field corridors that map to a web of separatrices and quasi-separatrix layers in the heliosphere. We compute analytically the topology of an open-field corridor and show that it produces a quasi-separatrix layer in the heliosphere that extends to angles far from the heliospheric current sheet. We then use an MHD code and MDI/SOHO observations of the photospheric magnetic field to calculate numerically, with high spatial resolution, the quasi-steady solar wind, and magnetic field for a time period preceding the 2008 August 1 total solar eclipse. Our numerical results imply that, at least for this time period, a web of separatrices (which we term an S-web) forms with sufficient density and extent in the heliosphere to account for the observed properties of the slow wind. We discuss the implications of our S-web model for the structure and dynamics of the corona and heliosphere and propose further tests of the model.

Antiochos, S. K. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Mikic, Z.; Titov, V. S.; Lionello, R.; Linker, J. A., E-mail: spiro.antiochos@nasa.gov [Predictive Science, Inc., 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121 (United States)

2011-04-20T23:59:59.000Z

104

TURBULENT CONVECTION MODEL IN THE OVERSHOOTING REGION. II. THEORETICAL ANALYSIS  

SciTech Connect

Turbulent convection models (TCMs) are thought to be good tools to deal with the convective overshooting in the stellar interior. However, they are too complex to be applied to calculations of stellar structure and evolution. In order to understand the physical processes of the convective overshooting and to simplify the application of TCMs, a semi-analytic solution is necessary. We obtain the approximate solution and asymptotic solution of the TCM in the overshooting region, and find some important properties of the convective overshooting. (1) The overshooting region can be partitioned into three parts: a thin region just outside the convective boundary with high efficiency of turbulent heat transfer, a power-law dissipation region of turbulent kinetic energy in the middle, and a thermal dissipation area with rapidly decreasing turbulent kinetic energy. The decaying indices of the turbulent correlations k, u{sub r}'T'-bar, and T'T'-bar are only determined by the parameters of the TCM, and there is an equilibrium value of the anisotropic degree {omega}. (2) The overshooting length of the turbulent heat flux u{sub r}'T'-bar is about 1H{sub k} (H{sub k} = |dr/dln k|). (3) The value of the turbulent kinetic energy at the convective boundary k{sub C} can be estimated by a method called the maximum of diffusion. Turbulent correlations in the overshooting region can be estimated by using k{sub C} and exponentially decreasing functions with the decaying indices.

Zhang, Q. S.; Li, Y., E-mail: zqs@ynao.ac.cn, E-mail: ly@ynao.ac.cn [National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011 (China)

2012-05-01T23:59:59.000Z

105

Wideband source location through frequency-dependent modeling  

Science Conference Proceedings (OSTI)

This paper describes a method for locating multiple wideband sources using the signals received by an array of sensors. In the present approach, the problem of source location is treated as a frequency dependent estimation problem. Each wideband source ...

Y. Grenier

1994-05-01T23:59:59.000Z

106

A database approach to information retrieval: The remarkable relationship between language models and region models  

E-Print Network (OSTI)

In this report, we unify two quite distinct approaches to information retrieval: region models and language models. Region models were developed for structured document retrieval. They provide a well-defined behaviour as well as a simple query language that allows application developers to rapidly develop applications. Language models are particularly useful to reason about the ranking of search results, and for developing new ranking approaches. The unified model allows application developers to define complex language modeling approaches as logical queries on a textual database. We show a remarkable one-to-one relationship between region queries and the language models they represent for a wide variety of applications: simple ad-hoc search, cross-language retrieval, video retrieval, and web search.

Hiemstra, Djoerd

2010-01-01T23:59:59.000Z

107

Energy Planning in Selected European Regions - Methods for Evaluating the Potential of Renewable Energy Sources.  

E-Print Network (OSTI)

??Given their potentially positive impact on climate protection and the preservation of fossil resources, alternative energy sources have become increasingly important for the energy supply… (more)

Sliz-Szkliniarz, Beata

2013-01-01T23:59:59.000Z

108

"Table A42. Average Prices of Purchased Energy Sources by Census Region,"  

U.S. Energy Information Administration (EIA) Indexed Site

1" 1" " (Estimates in Dollars per Physical Units)" ,,,,,"Noncombustible Energy Sources",,,,,,,,,,,,,,,,,,"Combustible Energy Sources" ,,,,,,,,,,,,,,,"Solids",,,,,,,,,,"Gases",,,,,,,,,"Liquids" " "," ",," "," ",,,,," "," "," "," "," "," "," ",,,"Wood","Wood Residues",,,,,,,,,,,,,,,,,,,," " " "," ",,"Electricity","Electricity","Electricity","Steam","Steam","Steam","Industrial",," ","Bituminous and"," ",," ",,,"Harvested","and Byproducts","Wood and",,"Natural Gas",,,,,,,"Total Diesel Fuel",,,,,"Motor Gasoline",,,,," "

109

An Integrated Computer Modeling Environment For Regional Land Use, Air Quality, And Transportation Planning  

E-Print Network (OSTI)

The Land Use, Air Quality, and Transportation Integrated Modeling Environment (LATIME) represents an integrated approach to computer modeling and simulation of land use allocation, travel demand, and mobile source emissions for the Albuquerque, New Mexico, area. This environment provides predictive capability combined with a graphical and geographical interface. The graphical interface shows the causal relationships between data and policy scenarios and supports alternative model formulations. Scenarios are launched from within a Geographic Information System (GIS), and data produced by each model component at each time step within a simulation is stored in the GIS. A menudriven query system is utilized to review link-based results and regional and areawide results. These results can also be compared across time or between alternative land use scenarios. Using this environment, policies can be developed and implemented based on comparative analysis, rather than on single-step future pr...

Charles Hanley Renewable; Norman L. Marshall; Charles J. Hanley; Charles J. Hanley

1997-01-01T23:59:59.000Z

110

Sub-national TIMES model for analyzing regional future use of Biomass and Biofuels in France and  

E-Print Network (OSTI)

1 Sub-national TIMES model for analyzing regional future use of Biomass and Biofuels in France Introduction Renewable energy sources such as biomass and biofuels are increasingly being seen as important of biofuels on the final consumption of energy in transport should be 10%. The long-term target is to reduce

Paris-Sud XI, Université de

111

THE CORONAL SOURCE OF EXTREME-ULTRAVIOLET LINE PROFILE ASYMMETRIES IN SOLAR ACTIVE REGION OUTFLOWS  

SciTech Connect

High-resolution spectra from the Hinode EUV Imaging Spectrometer have revealed that coronal spectral line profiles are sometimes asymmetric, with a faint enhancement in the blue wing on the order of 100 km s{sup -1}. These asymmetries could be important since they may be subtle yet diagnostically useful signatures of coronal heating or solar wind acceleration processes. It has also been suggested that they are signatures of chromospheric jets supplying mass and energy to the corona. Until now, however, there have been no studies of the physical properties of the plasma producing the asymmetries. Here we identify regions of asymmetric profiles in the outflows of AR 10978 using an asymmetric Gaussian function and extract the intensities of the faint component using multiple Gaussian fits. We then derive the temperature structure and chemical composition of the plasma producing the asymmetries. We find that the asymmetries are dependent on temperature, and are clearer and stronger in coronal lines. The temperature distribution peaks around 1.4-1.8 MK with an emission measure at least an order of magnitude larger than that at 0.6 MK. The first ionization potential bias is found to be 3-5, implying that the high-speed component of the outflows may also contribute to the slow-speed wind. Observations and models indicate that it takes time for plasma to evolve to a coronal composition, suggesting that the material is trapped on closed loops before escaping, perhaps by interchange reconnection. The results, therefore, identify the plasma producing the asymmetries as having a coronal origin.

Brooks, David H. [College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States); Warren, Harry P., E-mail: dhbrooks@ssd5.nrl.navy.mil [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)

2012-11-20T23:59:59.000Z

112

The Energy Source for the Coastal-Trapped Waves in the Australian Coastal Experiment Region  

Science Conference Proceedings (OSTI)

The sea level on the southern Australian coast is examined for the source of the coastal-trapped wave energy observed during the Australian Coastal Experiment. Sea level, adjusted for atmospheric pressure, and atmospheric pressure are observed to ...

John A. Church; Howard J. Freeland

1987-03-01T23:59:59.000Z

113

Knowledge-based modeling using GIS: nonpoint source pollution application  

E-Print Network (OSTI)

The concept of visualization in hydrologic modeling is discussed. A concept for integrating a knowledge-based system for analyzing simulation results is introduced. Visualization and expert, computer-based analysis when combined together produces a powerful tool for spatial data analysis and decision support. An application of such an integrated system in the context of nonpoint source (NPS) pollution control has been discussed to demonstrate these concepts. After a simulated implementation of the BMP recommendations, about 40 percent of the reduction in the area contributing above threshold limits (5 t/ac/yr) while 60 percent reduction in terms of volume of soil was observed over the watershed, for given rainfall conditions. The system provides an unique opportunity to evaluate and visualize the effects of alternative management practices used for erosion control. It was found that with appropriate land management, about at least a 40 percent reduction in the area exceeding the threshold can be obtained for rainfall ranging from 0.5 to 5 inches. A methodology for addressing nutrient management has been developed as well. Although the domain specific nature of the system limits the alternatives assessed, the system addresses the need for GIS based data analysis and interpretation, and also generates an optimum best management practices (BMPS) map for NPS pollution control.

Mohite, Mahendra P.

1993-01-01T23:59:59.000Z

114

Assessment of the Performance of CORDEX Regional Climate Models in Simulating Eastern Africa Rainfall  

Science Conference Proceedings (OSTI)

This study evaluates the ability of ten Regional Climate Models (RCMs) from the COordinated Regional climate Downscaling Experiment (CORDEX) in simulating the characteristics of rainfall patterns over Eastern Africa region. The seasonal ...

Hussen Seid Endris; Philip Omondi; Suman Jain; Christopher Lennard; Bruce Hewitson; Ladislaus Chang’a; J. L. Awange; Alessandro Dosio; Patrick Ketiem; Grigory Nikulin; Hans-Jürgen Panitz; Matthias Büchner; Frode Stordal; Lukiya Tazalika

115

Improvement of snowpack simulations in a regional climate model  

SciTech Connect

To improve simulations of regional-scale snow processes and related cold-season hydroclimate, the Community Land Model version 3 (CLM3), developed by the National Center for Atmospheric Research (NCAR), was coupled with the Pennsylvania State University/NCAR fifth-generation Mesoscale Model (MM5). CLM3 physically describes the mass and heat transfer within the snowpack using five snow layers that include liquid water and solid ice. The coupled MM5–CLM3 model performance was evaluated for the snowmelt season in the Columbia River Basin in the Pacific Northwestern United States using gridded temperature and precipitation observations, along with station observations. The results from MM5–CLM3 show a significant improvement in the SWE simulation, which has been underestimated in the original version of MM5 coupled with the Noah land-surface model. One important cause for the underestimated SWE in Noah is its unrealistic land-surface structure configuration where vegetation, snow and the topsoil layer are blended when snow is present. This study demonstrates the importance of the sheltering effects of the forest canopy on snow surface energy budgets, which is included in CLM3. Such effects are further seen in the simulations of surface air temperature and precipitation in regional weather and climate models such as MM5. In addition, the snow-season surface albedo overestimated by MM5–Noah is now more accurately predicted by MM5–CLM3 using a more realistic albedo algorithm that intensifies the solar radiation absorption on the land surface, reducing the strong near-surface cold bias in MM5–Noah. The cold bias is further alleviated due to a slower snowmelt rate in MM5–CLM3 during the early snowmelt stage, which is closer to observations than the comparable components of MM5–Noah. In addition, the over-predicted precipitation in the Pacific Northwest as shown in MM5–Noah is significantly decreased in MM5 CLM3 due to the lower evaporation resulting from the longer snow duration.

Jin, J.; Miller, N.L.

2011-01-10T23:59:59.000Z

116

Aquatic Sources and Sinks of CO2 and CH4 in the Polar Regions  

Science Conference Proceedings (OSTI)

The highest concentration and greatest seasonal amplitudes of atmospheric CO2 and CH4 occur at 60°–70°N, outside the 30°–60°N band where the main sources of anthropogenic CO2 and CH4 are located, indicating that the northern environment is a ...

I. P. Semiletov

1999-01-01T23:59:59.000Z

117

The Use of Conditional Probability Functions and Potential Source Contribution Functions to Identify Source Regions and Advection Pathways of Hydrocarbon Emissions in Houston, Texas  

SciTech Connect

In this study, we demonstrate the utility of conditional probability functions (CPFs), potential source contribution functions (PSCFs), and hierarchical clustering analysis to identify the source region and transport pathways of hydrocarbons measured at five photochemical assessment monitoring stations (PAMS) near the Houston ship channel from June to October 2003. Over 50 volatile organic compound (VOC) concentrations were measured on the hourly collected samples. Routine surface observations of wind directions measured at each of the receptor sites were used extensively. We show that VOCs with similar CPF patterns likely have common transport pathways. This was established with the multivariate technique, which uses the hierarchical clustering analysis to allow clusters of groups of VOCs to form with similar CPF patterns. This method revealed that alkenes, and in particular those with geometric isomers such as cis-/trans-2-butene and cis-/trans-2-pentene, have similar CPF patterns. The alkane isomers often show CPF patterns among themselves, and similarly, aromatic compounds often show similar patterns among themselves too. We also show how trajectory information can be used in conjunction with the PSCF analysis to produce a graphic analysis suggesting specific source areas for a given VOC. The use of these techniques in the chemically and meteorologically complex environment of Houston, Texas, suggests its further utility in other areas with relatively simpler conditions.

Xie, YuLong; Berkowitz, Carl M.

2007-09-01T23:59:59.000Z

118

Source region of the 2003 November 18 CME that led to the strongest magnetic storm of cycle 23  

E-Print Network (OSTI)

The super-storm of November 20, 2003 was associated with a high speed coronal mass ejection which originated in the NOAA AR 10501 on November 18. This coronal mass ejection had severe terrestrial consequences leading to a geomagnetic storm with DST index of -472 nT, the strongest of the current solar cycle. In this paper, we attempt to understand the factors that led to the coronal mass ejection on November 18. We have also studied the evolution of the photospheric magnetic field of NOAA AR 10501, the source region of this coronal mass ejection. For this purpose, the MDI line-of-sight magnetograms and vector magnetograms from Solar Flare Telescope, Mitaka, obtained during November, 17-19, 2003 were analysed. In particular, quantitative estimates of the temporal variation in magnetic flux, energy and magnetic field gradient were estimated for the source active region. The evolution of these quantities was studied for the 3-day period with an objective to understand the pre-flare configuration leading up to the moderate flare which was associated with the geo-effective coronal mass ejection. We also examined the chromospheric images recorded in H-alpha from Udaipur Solar Observatory to compare the flare location with regions of different magnetic field and energy. Our observations provide evidence that the flare associated with the CME occurred at a location marked by high magnetic field gradient which led to release of free energy stored in the active region.

N. Srivastava; S. Mathew; R. Louis; T. Wiegelmann

2008-12-30T23:59:59.000Z

119

A Global, Multi-Resolution Approach to Regional Ocean Modeling  

SciTech Connect

In this collaborative research project between Pennsylvania State University, Colorado State University and Florida State University, we mainly focused on developing multi-resolution algorithms which are suitable to regional ocean modeling. We developed hybrid implicit and explicit adaptive multirate time integration method to solve systems of time-dependent equations that present two signi#12;cantly di#11;erent scales. We studied the e#11;ects of spatial simplicial meshes on the stability and the conditioning of fully discrete approximations. We also studies adaptive #12;nite element method (AFEM) based upon the Centroidal Voronoi Tessellation (CVT) and superconvergent gradient recovery. Some of these techniques are now being used by geoscientists(such as those at LANL).

Du, Qiang

2013-11-08T23:59:59.000Z

120

Interhemispheric teleconnections from tropical heat sources in intermediate and simple models  

Science Conference Proceedings (OSTI)

The mechanisms that control the interhemispheric teleconnections from tropical heat sources are investigated using an intermediate complexity model (a Quasi-Equilibrium Tropical Circulation Model, QTCM) and a simple linear two-level model with dry ...

X. Ji; J. D. Neelin; S.-K. Lee; C. R. Mechoso

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Source of Gravity Waves within a Vortex-Dipole Jet Revealed by a Linear Model  

Science Conference Proceedings (OSTI)

This study develops a linear numerical model to address the source mechanism of the gravity waves generated within a vortex dipole simulated in a fully nonlinear nonhydrostatic mesoscale model. The background flow for this linear model is ...

Shuguang Wang; Fuqing Zhang

2010-05-01T23:59:59.000Z

122

CTDMPLUS: A Dispersion Model for Sources near Complex Topography. Part I: Technical Formulations  

Science Conference Proceedings (OSTI)

The Complex Terrain Dispersion Model (CTDMPLUS), a point-source, steady-state model for complex-terrain applications, is described. The model simulates the flow and plume distortion near user-selected, three-dimensional terrain features, yet ...

Steven G. Perry

1992-07-01T23:59:59.000Z

123

Open Source Software for Materials and Process Modeling  

Science Conference Proceedings (OSTI)

Though open source engineering analysis tools have not been widely deployed, ... over half of websites,3 and the market share of the open source Firefox web ... 10 kWh of energy per kg of product.7 The magnesium (hydr)oxide dissolves in a ... to post-process the information generated by the ATAT code, which consists of

124

The 1988 and 1990 Summer Season Simulations for West Africa Using a Regional Climate Model  

Science Conference Proceedings (OSTI)

Simulations have been undertaken using a regional climate model (RegCM2) developed at the National Center for Atmospheric Research for the West African growing season (June–September) periods of 1988 and 1990. The regional climate model ...

Gregory S. Jenkins

1997-06-01T23:59:59.000Z

125

Transient Future Climate over the Western United States Using a Regional Climate Model  

Science Conference Proceedings (OSTI)

Regional climate models (RCMs) have improved our understanding of the effects of global climate change on specific regions. The need for realistic forcing has led to the use of fully coupled global climate models (GCMs) to produce boundary ...

Mark A. Snyder; Lisa C. Sloan

2005-07-01T23:59:59.000Z

126

Application of Scale-Selective Data Assimilation to Regional Climate Modeling and Prediction  

Science Conference Proceedings (OSTI)

A method referred to as scale-selective data assimilation (SSDA) is designed to inject the large-scale components of the atmospheric circulation from a global model into a regional model to improve regional climate simulations and predictions. ...

Shiqiu Peng; Lian Xie; Bin Liu; Fredrick Semazzi

2010-04-01T23:59:59.000Z

127

The Impact of Spectral Nudging on Cloud Simulation with a Regional Atmospheric Model  

Science Conference Proceedings (OSTI)

The impact of spectral nudging on cloud simulation with a regional atmospheric model was examined. Simulated cloudiness of the Regional Model (REMO) and the Spectrally Nudged REMO (SN-REMO) were intercompared and evaluated with satellite-derived ...

Insa Meinke; Beate Geyer; Frauke Feser; Hans von Storch

2006-06-01T23:59:59.000Z

128

The influence of material models on chemical or nuclear-explosion source functions  

SciTech Connect

Physical models of explosion sources are needed to explain the variations in the performance of existing discriminants in different regions, and to help develop more robust methods for identifying underground explosions. In this paper, we assess the sensitivity of explosion source functions to material properties by means of numerical simulations. Specifically, we have calculated the effect of varying the yield strength, overburden pressure, and gas porosity on the spectra of the reduced velocity potential for both nuclear and chemical explosions, and compared these with experimental results derived from free-field particle acceleration and regional seismic (LNN) data. The chemical-explosion calculations were intended to simulate the kiloton experiment recently conducted in Area 12 of the Nevada Test Site (NTS) that has been dubbed the Non-Proliferation Experiment (NPE). We found that the asymptotic (long period) value of the reduced displacement potential, {phi}{infinity}, for explosions with the ANFO blasting agent used in the NPE, was larger than that derived for a tamped nuclear explosion of the same yield by a factor of 1.9, in good agreement with the experimental results derived from free-field particle velocity measurements, and also with m{sub b}(P{sub n}) data from the Livermore Nevada Network (LNN).

Glenn, L.A.; Goldstein, P.

1994-04-01T23:59:59.000Z

129

HIGH-RESOLUTION SEISMIC VELOCITY AND ATTENUATION MODELS OF THE CAUCASUS-CASPIAN REGION  

SciTech Connect

The southwest edge of Eurasia is a tectonically and structurally complex region that includes the Caspian and Black Sea basins, the Caucasus Mountains, and the high plateaus south of the Caucasus. Using data from 25 broadband stations located in the region, new estimates of crustal and upper mantle thickness, velocity structure, and attenuation are being developed. Receiver functions have been determined for all stations. Depth to Moho is estimated using slant stacking of the receiver functions, forward modeling, and inversion. Moho depths along the Caspian and in the Kura Depression are in general poorly constrained using only receiver functions due to thick sedimentary basin sediments. The best fitting models suggest a low velocity upper crust with Moho depths ranging from 30 to 40 km. Crustal thicknesses increase in the Greater Caucasus with Moho depths of 40 to 50 km. Pronounced variations with azimuth of source are observed indicating 3D structural complexity and upper crustal velocities are higher than in the Kura Depression to the south. In the Lesser Caucasus, south and west of the Kura Depression, the crust is thicker (40 to 50 km) and upper crustal velocities are higher. Work is underway to refine these models with the event based surface wave dispersion and ambient noise correlation measurements from continuous data. Regional phase (Lg and Pg) attenuation models as well as blockage maps for Pn and Sn are being developed. Two methods are used to estimate Q: the two-station method to estimate inter-station Q and the reversed, two-station, two event method. The results are then inverted to create Lg and Pg Q maps. Initial results suggest substantial variations in both Pg and Lg Q in the region. A zone of higher Pg Q extends west from the Caspian between the Lesser and Greater Caucasus and a narrow area of higher Lg Q is observed.

Mellors, R; Gok, R; Pasyanos, M; Skobeltsyn, G; Teoman, U; Godoladze, T; Sandvol, E

2008-07-01T23:59:59.000Z

130

Use of additional fission sources or scattering sources to model inward axial leakages in fast-reactor analysis  

Science Conference Proceedings (OSTI)

When calculations of flux are done in less than three dimensions, bucklings are normally used to model leakages (flows) in the dimensions for which the flux is not calculated. If the net leakage for a given energy group is outward (positive), the buckling is positive, and buckling methods work well. However, if the new leakage for a given energy group is inward (negative), the buckling is negative and can lead to numerical instabilities (oscillations in the iterative flux calculation). This report discusses two equivalent nonbuckling methods to model inward leakages. One method (the chi/sub g/ method) models these incoming neutrons by additional fission sources. The other method (the ..sigma../sub s/(1 ..-->.. g) method) models them by increased downscatter sources. The derivation of the two methods is shown, and the flux spectra obtained by their use are compared with those obtained from two-dimensional (RZ) calculations.

Grimm, K.N.; Meneghetti, D.

1981-10-01T23:59:59.000Z

131

Modeling Terrestrial Biogenic Sources of Oxygenated Organic Emissions  

Science Conference Proceedings (OSTI)

In recent years, oxygenated volatile organic chemicals (OVOCs) likeacetone have been recognized as important atmospheric constituents due to their ability to sequester reactive nitrogen in the form peroxyacetyl nitrate (PAN) and to be a source ...

Christopher Potter; Steven Klooster; David Bubenheim; Hanwant B. Singh; Ranga Myneni

2003-07-01T23:59:59.000Z

132

Dynamical Tropical Cyclone Track Forecast Errors. Part I: Tropical Region Error Sources  

Science Conference Proceedings (OSTI)

All highly erroneous (>300 n mi or 555 km at 72 h) Navy Operational Global Atmospheric Prediction System (NOGAPS) and U.S. Navy version of the Geophysical Fluid Dynamics Laboratory model (GFDN) tropical cyclone track forecasts in the western ...

Lester E. Carr III; Russell L. Elsberry

2000-12-01T23:59:59.000Z

133

Implementation and validation of a Ground Source Heat Pump model in MATLAB.  

E-Print Network (OSTI)

??The aim of the project is the implementation of a simple Ground-Source Heat Pump (GSHP) system model in MATLAB. The program is able to run… (more)

Casetta, Damien

2012-01-01T23:59:59.000Z

134

Solar Resource Assessment: Databases, Measurements, Models, and Information Sources (Fact Sheet)  

DOE Green Energy (OSTI)

Fact sheet for Solar Resource Assessment Workshop, Denver CO, Oct 29, 2008: ?Solar Resource Assessment Databases, Measurements, Models, and Information Sources

Not Available

2008-10-01T23:59:59.000Z

135

Modeling Study of Proposed Field Calibration Source Using K-40 Source and High-Z Targets for Sodium Iodide Detector  

E-Print Network (OSTI)

The Department of Energy (DOE) has ruled that all sealed radioactive sources, even those considered exempt under Nuclear Regulatory Commission regulations, are subject to radioactive material controls. However, sources based on the primordial isotope potassium-40 (40K) are not subject to these restrictions. Potassium-40’s beta spectrum and 1460.8 keV gamma ray can be used to induce K-shell fluorescence x rays in high-Z metals between 60 and 80 keV. A gamma ray calibration source is thus proposed that uses potassium chloride salt and a high-Z metal to create a two-point calibration for a sodium iodide field gamma spectroscopy instrument. The calibration source was designed in collaboration with Sandia National Laboratory using the Monte Carlo N-Particle eXtended (MCNPX) transport code. The x ray production was maximized while attempting to preserve the detector system’s sensitivity to external sources by minimizing the count rate and shielding effect of the calibration source. Since the source is intended to be semi-permanently fixed to the detector, the weight of the calibration source was also a design factor. Two methods of x-ray production were explored. First, a thin high-Z layer (HZL) was interposed between the detector and the potassium chloride-urethane source matrix. Second, bismuth metal powder was homogeneously mixed with a urethane binding agent to form a potassium chloride-bismuth matrix (KBM). The two methods were directly compared using a series of simulations, including their x ray peak strengths, pulse-height spectral characteristics, and response to a simulated background environment. The bismuth-based source was selected as the development model because it is cheap, nontoxic, and outperforms the high-Z layer method in simulation. The overall performance for the bismuth-based source was significantly improved by splitting the calibration source longitudinally into two halves and placing them on either side of the detector. The performance was improved further by removing the binding agent and simulating a homogeneous mixture of potassium chloride and bismuth powder in a 0.1 cm plastic casing. The split plastic-encased potassium chloride-bismuth matrix would serve as a light, cheap, field calibration source that is not subject to DOE restrictions.

Rogers, Jeremy 1987-

2012-12-01T23:59:59.000Z

136

Regional maps Figure F4. Oil and gas supply model regions Figure ...  

U.S. Energy Information Administration (EIA)

75 95 100 0 5 25 75 95 100 0 5 25 75 95 Source: U.S. Energy Information Administration, Office of Energy Analysis. 100. Created Date: 4/30/2013 2:24:47 PM ...

137

The coronal source of extreme-ultraviolet line profile asymmetries in solar active region outflows  

E-Print Network (OSTI)

High resolution spectra from the Hinode EUV Imaging Spectrometer (EIS) have revealed that coronal spectral line profiles are sometimes asymmetric, with a faint enhancement in the blue wing on the order of 100 km/s. These asymmetries could be important since they may be subtle, yet diagnostically useful signatures of coronal heating or solar wind acceleration processes. It has also been suggested that they are signatures of chromospheric jets supplying mass and energy to the corona. Until now, however, there have been no studies of the physical properties of the plasma producing the asymmetries. Here we identify regions of asymmetric profiles in the outflows of AR 10978 using an asymmetric Gaussian function and extract the intensities of the faint component using multiple Gaussian fits. We then derive the temperature structure and chemical composition of the plasma producing the asymmetries. We find that the asymmetries are dependent on temperature, and are clearer and stronger in coronal lines. The temperatur...

Brooks, David H

2012-01-01T23:59:59.000Z

138

Modeling and Experimental Research on Ground-Source Heat Pump in Operation by Neural Network  

Science Conference Proceedings (OSTI)

Ground source Heat Pump(GSHP) is becoming the more and more focus of the world¡¯s attention as a HVAC technique of energy saving and environment protection. This paper first introduced the experiment for Ground-Source water/water Heat Pump. The heat ... Keywords: Ground-Source Heat Pump(GSHP), Neural Network(NN) Predication modeling

Jianping Chen; Zhiwei Lian; Lizheng Tan; Weifeng Zhu; Weiqiang Zhang

2011-02-01T23:59:59.000Z

139

Level: National and Regional Data; Row: NAICS Codes; Column: Energy Sources and Shipments;  

U.S. Energy Information Administration (EIA) Indexed Site

Coke and Shipments Net Residual Distillate Natural LPG and Coal Breeze of Energy Sources NAICS Total(b) Electricity(c) Fuel Oil Fuel Oil(d) Gas(e) NGL(f) (million (million Other(g) Produced Onsite(h) Code(a) Subsector and Industry (trillion Btu) (million kWh) (million bbl) (million bbl) (billion cu ft) (million bbl) short tons) short tons) (trillion Btu) (trillion Btu) Total United States RSE Column Factors: 0.9 1 1.2 1.8 1 1.6 0.8 0.9 1.2 0.4 311 Food 1,123 67,521 2 3 567 1 8 * 89 0 311221 Wet Corn Milling 217 6,851 * * 59 * 5 0 11 0 31131 Sugar 112 725 * * 22 * 2 * 46 0 311421 Fruit and Vegetable Canning 47 1,960 * * 35 * 0 0 1 0 312 Beverage and Tobacco Products 105 7,639 * * 45 * 1 0 11 0 3121 Beverages 85 6,426 * * 41 * * 0 10 0 3122 Tobacco 20 1,213 * * 4 * * 0 1 0 313 Textile Mills 207 25,271 1 * 73 * 1 0 15 0 314

140

Source region of the 2003 November 18 CME that led to the strongest magnetic storm of cycle 23  

E-Print Network (OSTI)

The super-storm of November 20, 2003 was associated with a high speed coronal mass ejection which originated in the NOAA AR 10501 on November 18. This coronal mass ejection had severe terrestrial consequences leading to a geomagnetic storm with DST index of -472 nT, the strongest of the current solar cycle. In this paper, we attempt to understand the factors that led to the coronal mass ejection on November 18. We have also studied the evolution of the photospheric magnetic field of NOAA AR 10501, the source region of this coronal mass ejection. For this purpose, the MDI line-of-sight magnetograms and vector magnetograms from Solar Flare Telescope, Mitaka, obtained during November, 17-19, 2003 were analysed. In particular, quantitative estimates of the temporal variation in magnetic flux, energy and magnetic field gradient were estimated for the source active region. The evolution of these quantities was studied for the 3-day period with an objective to understand the pre-flare configuration leading up to the...

Srivastava, N; Louis, R; Wiegelmann, T

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

The Scripps Coupled Ocean–Atmosphere Regional (SCOAR) Model, with Applications in the Eastern Pacific Sector  

Science Conference Proceedings (OSTI)

A regional coupled ocean–atmosphere model is introduced. It is designed to admit the air–sea feedbacks arising in the presence of an oceanic mesoscale eddy field. It consists of the Regional Ocean Modeling System (ROMS) and the Regional Spectral ...

Hyodae Seo; Arthur J. Miller; John O. Roads

2007-02-01T23:59:59.000Z

142

Blind separation of non-stationary sources using continuous density hidden Markov models  

Science Conference Proceedings (OSTI)

Blind source separation (BSS) has attained much attention in signal processing society due to its 'blind' property and wide applications. However, there are still some open problems, such as underdetermined BSS, noise BSS. In this paper, we propose a ... Keywords: Blind source separation, Continuous density hidden Markov model, Expectation-maximization, Gaussian mixture model, Non-stationary

Fanglin Gu, Hang Zhang, Desheng Zhu

2013-09-01T23:59:59.000Z

143

Mixed source model and its adapted vocal tract filter estimate for voice transformation and synthesis  

Science Conference Proceedings (OSTI)

In current methods for voice transformation and speech synthesis, the vocal tract filter is usually assumed to be excited by a flat amplitude spectrum. In this article, we present a method using a mixed source model defined as a mixture of the Liljencrants-Fant ... Keywords: Glottal model, Mixed source, Speech synthesis, Vocal tract filter, Voice quality, Voice transformation

Gilles Degottex; Pierre Lanchantin; Axel Roebel; Xavier Rodet

2013-02-01T23:59:59.000Z

144

A Split Explicit Reformulation of the Regional Numerical Weather Prediction Model of the Japan Meteorological Agency  

Science Conference Proceedings (OSTI)

The split explicit integration scheme for numerical weather prediction models is employed in a version of the regional numerical weather prediction model of the Japan Meteorological Agency. The finite-difference scheme of the model is designed in ...

Dean G. Duffy

1981-05-01T23:59:59.000Z

145

Evaluation of the Surface Climatology over the Conterminous United States in the North American Regional Climate Change Assessment Program Hindcast Experiment Using a Regional Climate Model Evaluation System  

Science Conference Proceedings (OSTI)

Surface air temperature, precipitation, and insolation over the conterminous United States region from the North American Regional Climate Change Assessment Program (NARCCAP) regional climate model (RCM) hindcast study are evaluated using the Jet ...

Jinwon Kim; Duane E. Waliser; Chris A. Mattmann; Linda O. Mearns; Cameron E. Goodale; Andrew F. Hart; Dan J. Crichton; Seth McGinnis; Huikyo Lee; Paul C. Loikith; Maziyar Boustani

2013-08-01T23:59:59.000Z

146

Regional load curve models: specification and estimation of the DRI Model. Final report. [Forecasts of electric loads in 32 US regions  

SciTech Connect

The DRI Model of hourly load curves is developed in this report. The model is capable of producing long-term forecasts for 32 US regions. These regions were created by aggregating hourly system load data from 146 electric utilities. These utilities supply approximately 95% of all electricity consumed in the continental US. The model forecasts electricity demands for each hour of the year for each of the 32 regions. Model output includes forecasts of peak demands, megawatt hour demands, load factors, and load duration curves. The DRI Model is estimated in two stages. In the first stage, for each region and month, hourly electricity demands are parameterized into load components representing the effects of lifestyles and weather on regional loads through a time-series model. In the second stage, the variation in these parameterized load components across months and regions is modeled econometrically in terms of energy prices, income levels, appliance saturation rates, and other variables. The second-stage models are essentially models of electricity demand which are estimated using estimated first-stage parameters as dependent variables, instead of observed demands. Regional price and income demand elasticities are implied by the second-stage models. Moreover, since the dependent variables refer to particular hours of the day, these estimated elasticities are hour-specific. (Since prices did not vary over the day in years when hourly load data were available, hour-to-hour, cross-price elasticities were not estimated.) Integrated system hourly load forecasts are obtained combining the influences of individual customer classes. Finally, approximate customer class hourly load shapes can be produced for each region, though these series may be useful only in research endeavors since they lack the precision available through survey methods.

Platt, H.D.; Einhorn, M.A.; Ignelzi, P.C.; Poirier, D.J.

1981-01-01T23:59:59.000Z

147

NREL: Regional Energy Deployment System (ReEDS) Model - Documentation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Assumptions Model Parameters, Variables, and Equations Appendix Printable Version ReEDS Home Model Description Unique Value Documentation Publications NREL is a national...

148

Abstract: Critical Region Vapor-Liquid Equilibrium Model of ...  

Science Conference Proceedings (OSTI)

Two distinct thermodynamic models, the modified Leung-Griffiths (MLG) model ... three iterations, the two correlations are in basic agreement except ...

149

Impact of Ingesting Satellite-Derived Cloud Cover into the Regional Atmospheric Modeling System  

Science Conference Proceedings (OSTI)

This study investigates the extent to which assimilating high-resolution remotely sensed cloud cover into the Regional Atmospheric Modeling System (RAMS) provides an improved regional diagnosis of downward short- and longwave surface radiation ...

Ismail Yucel; W. James Shuttleworth; R. T. Pinker; L. Lu; S. Sorooshian

2002-03-01T23:59:59.000Z

150

Two-Year Simulation of the Great Lakes Region with a Coupled Modeling System  

Science Conference Proceedings (OSTI)

In this paper, we report on an experiment aimed at evaluating the feasibility of the application of our coupled regional climate modeling system to long-term climate simulations over the Great Lakes region. The simulation analyzed covers a ...

Gary T. Bates; Steven W. Hostetler; Filippo Giorgi

1995-05-01T23:59:59.000Z

151

Greenhouse Gas–Induced Changes in Summer Precipitation over Colorado in NARCCAP Regional Climate Models  

Science Conference Proceedings (OSTI)

Precipitation changes between 32-yr periods in the late twentieth and mid-twenty-first centuries are investigated using regional climate model simulations provided by the North American Regional Climate Change Assessment Program (NARCCAP). The ...

Michael A. Alexander; James D. Scott; Kelly Mahoney; Joseph Barsugli

2013-11-01T23:59:59.000Z

152

Greenhouse Gas Induced Changes in Summer Precipitation over Colorado in NARCCAP Regional Climate Models  

Science Conference Proceedings (OSTI)

Precipitation changes between 32-year periods in the late-20th and mid-21st centuries are investigated using regional climate model simulations provided by the North American Regional Climate Change Assessment Program (NARCCAP). The simulations ...

Michael A. Alexander; James D. Scott; Kelly Mahoney; Joseph Barsugli

153

Modeling Seasonal Tropical Cyclone Activity in the Fiji Region as a Binary Classification Problem  

Science Conference Proceedings (OSTI)

This study presents a binary classification model for the prediction of tropical cyclone (TC) activity in the Fiji, Samoa, and Tonga regions (the FST region) using the accumulated cyclone energy (ACE) as a proxy of TC activity. A probit regression ...

Savin S. Chand; Kevin J. E. Walsh

2012-07-01T23:59:59.000Z

154

Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et  

Open Energy Info (EERE)

Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et Al., 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et Al., 2009) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown References Glenn Biasi, Leiph Preston, Ileana Tibuleac (2009) Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators In The Western Great Basin Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Northern_Basin_%26_Range_Region_(Biasi,_Et_Al.,_2009)&oldid=40142

155

Does Nudging Squelch the Extremes in Regional Climate Modeling?  

Science Conference Proceedings (OSTI)

An important question in regional climate downscaling is whether to constrain (nudge) the interior of the limited-area domain toward the larger-scale driving fields. Prior research has demonstrated that interior nudging can increase the skill of ...

Tanya L. Otte; Christopher G. Nolte; Martin J. Otte; Jared H. Bowden

2012-10-01T23:59:59.000Z

156

Configuration and Evaluation of the WRF Model for the Study of Hawaiian Regional Climate  

Science Conference Proceedings (OSTI)

The Weather Research and Forecasting (WRF) model V3.3 has been configured for the Hawaiian Islands as a regional climate model for the region (HRCM). This paper documents the model configuration and presents a preliminary evaluation based on a ...

Chunxi Zhang; Yuqing Wang; Axel Lauer; Kevin Hamilton

2012-10-01T23:59:59.000Z

157

Modeling-Computer Simulations At Nw Basin & Range Region (Biasi, Et Al.,  

Open Energy Info (EERE)

Biasi, Et Al., Biasi, Et Al., 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nw Basin & Range Region (Biasi, Et Al., 2009) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown References Glenn Biasi, Leiph Preston, Ileana Tibuleac (2009) Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators In The Western Great Basin Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Nw_Basin_%26_Range_Region_(Biasi,_Et_Al.,_2009)&oldid=401461" Categories: Exploration Activities DOE Funded

158

The Natural Gas Market Model: Equations and data sources  

SciTech Connect

In 1981, EIA began a major study of the impact of natural gas deregulation. Through 1981, the major product of that study was the August 1981 EIA analysis paper entitled ''Analysis of Economic Effects of Accelerated Deregulation of Natural Gas Prices.'' That paper will be referred to as the ''Deregulation Study'' below. The Natural Gas Market Model (NGMM) was the primary model used to produce the forecasts discussed in the Deregulation Study. A modified version of NGMM has been used in the initial runs of the EIA Extended Short-term Forecasting System (ESFS), which is still under development. The purpose of this paper is to provide a comprehensive description of what NGMM is, and of the inputs used with NGMM for the Deregulation Study. The Deregulation Study, and the many documentation reports it cites, contain much information about the substantive studies which led up to the forecasts; however, it does not provide enough detail on how these studies were brought together to permit either a replication or an in-depth evaluation of the forecasts. EIA standards require that models be documented in enough detail to permit replication. This report attempts to fill that gap in documentation, on the basis of a line-by-line audit of the model code, interviews with the model developers, and a replication of the model in the user-oriented system Troll. The report mentions the mechanics of how the solutions are obtained, but not in complete detail. 2 figs., 6 tabs.

Werbos, P.J.

1981-11-01T23:59:59.000Z

159

Exploring Perturbed Physics Ensembles in a Regional Climate Model  

Science Conference Proceedings (OSTI)

Perturbed physics ensembles (PPEs) have been widely used to assess climate model uncertainties and have provided new estimates of climate sensitivity and parametric uncertainty in state-of-the-art climate models. So far, mainly global climate ...

Omar Bellprat; Sven Kotlarski; Daniel Lüthi; Christoph Schär

2012-07-01T23:59:59.000Z

160

Regional Models of the Atmosphere in Middle Latitudes  

Science Conference Proceedings (OSTI)

This review describes recent development in operational and research limited-area numerical weather prediction models in middle latitudes. The current skill of limited-area models is summarized through the use of conventional measures of ...

Richard A. Anthes

1983-06-01T23:59:59.000Z

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161

Modeling-Computer Simulations At U.S. West Region (Williams ...  

Open Energy Info (EERE)

Search Page Edit History Facebook icon Twitter icon Modeling-Computer Simulations At U.S. West Region (Williams & Deangelo, 2008) Jump to: navigation, search GEOTHERMAL...

162

Modeling-Computer Simulations At U.S. West Region (Sabin, Et...  

Open Energy Info (EERE)

Search Page Edit History Facebook icon Twitter icon Modeling-Computer Simulations At U.S. West Region (Sabin, Et Al., 2004) Jump to: navigation, search GEOTHERMAL...

163

PSCAD/EMTDC-Based Modeling and Analysis of a Microgrid with Renewable Energy Sources  

E-Print Network (OSTI)

Microgrid is a relatively new concept which has gained significant attention recently due to the increasing penetration of distributed energy sources. It brings many benefits to the traditional distribution system. Couples of microgrid testbeds in the forms of either hardware facilities or software simulation systems have been developed to study microgrid issues in many institutes throughout the world. In the work presented in this thesis, a microgrid system model in PSCAD/EMTDC was developed. The proposed microgrid system includes fundamental power system component models, two renewable energy source models (wind and solar) and one energy storage source model. Different case studies were conducted. The results from the simulation case studies showed that the proposed microgrid system in PSCAD had satisfactory performance under different scenarios with renewable energy sources. The proposed microgrid system model can be used for further research on microgrid issues.

Chu, Zhengguo

2010-05-01T23:59:59.000Z

164

Regional Climate Change Scenarios over the United States Produced with a Nested Regional Climate Model  

Science Conference Proceedings (OSTI)

In this paper two continuous 3½-year-long climate simulations over the continental United States are discussed, one for present-day conditions and one for conditions under double carbon dioxide concentration, conducted with a limited area model (...

Filippo Giorgi; Christine Shields Brodeur; Gary T. Bates

1994-03-01T23:59:59.000Z

165

Deep radio images of the HEGRA and Whipple TeV sources in the Cygnus OB2 region  

E-Print Network (OSTI)

Context. The modern generation of Cherenkov telescopes has revealed a new population of gamma-ray sources in the Galaxy. Some of them have been identified with previously known X-ray binary systems while other remain without clear counterparts a lower energies. Our initial goal here was reporting on extensive radio observations of the first extended and yet unidentified source, namely TeV J2032+4130. This object was originally detected by the HEGRA telescope in the direction of the Cygnus OB2 region and its nature has been a matter of debate during the latest years. Aims. We aim to pursue our radio exploration of the TeV J2032+4130 position that we initiated in a previous paper but taking now into account the latest results from new Whipple and MILAGRO TeV telescopes. Methods. Our investigation is mostly based on interferometric radio observations with the Giant Metre Wave Radio Telescope (GMRT) close to Pune (India) and the Very Large Array (VLA) in New Mexico (USA). We also conducted near infrared observati...

Marti, Josep; Ishwara Chandra C H; Bosch-Ramon, Valenti

2007-01-01T23:59:59.000Z

166

Examining Interior Grid Nudging Techniques Using Two-Way Nesting in the WRF Model for Regional Climate Modeling  

Science Conference Proceedings (OSTI)

This study evaluates interior nudging techniques using the Weather Research and Forecasting (WRF) model for regional climate modeling over the conterminous United States (CONUS) using a two-way nested configuration. NCEP–Department of Energy ...

Jared H. Bowden; Tanya L. Otte; Christopher G. Nolte; Martin J. Otte

2012-04-01T23:59:59.000Z

167

Hanford tank residual waste – contaminant source terms and release models  

Science Conference Proceedings (OSTI)

Residual waste is expected to be left in 177 underground storage tanks after closure at the U.S. Department of Energy’s Hanford Site in Washington State (USA). In the long term, the residual wastes represent a potential source of contamination to the subsurface environment. Residual materials that cannot be completely removed during the tank closure process are being studied to identify and characterize the solid phases and estimate the release of contaminants from these solids to water that might enter the closed tanks in the future. As of the end of 2009, residual waste from five tanks has been evaluated. Residual wastes from adjacent tanks C-202 and C-203 have high U concentrations of 24 and 59 wt%, respectively, while residual wastes from nearby tanks C-103 and C-106 have low U concentrations of 0.4 and 0.03 wt%, respectively. Aluminum concentrations are high (8.2 to 29.1 wt%) in some tanks (C-103, C-106, and S-112) and relatively low (Technetium leachability is not as strongly dependent on the concentration of Tc in the waste, and it appears to be slightly more leachable by the Ca(OH)2-saturated solution than by the CaCO3-saturated solution. In general, Tc is much less leachable (<10 wt% of the available mass in the waste) than previously predicted. This may be due to the coprecipitation of trace concentrations of Tc in relatively insoluble phases such as Fe oxide/hydroxide solids.

Deutsch, William J.; Cantrell, Kirk J.; Krupka, Kenneth M.; Lindberg, Michael J.; Serne, R. Jeffrey

2011-08-23T23:59:59.000Z

168

Regional Climate Model Projections and Uncertainties of U.S. Summer Heat Waves  

Science Conference Proceedings (OSTI)

Regional climate model (RCM) simulations, driven by low and high climate-sensitivity coupled general circulation models (CGCMs) under various future emissions scenarios, were compared to projected changes in heat wave characteristics. The RCM ...

Kenneth E. Kunkel; Xin-Zhong Liang; Jinhong Zhu

2010-08-01T23:59:59.000Z

169

Quantitative Precipitation Forecasting for the Tennessee and Cumberland River Watersheds Using the NCEP Regional Spectral Model  

Science Conference Proceedings (OSTI)

A limited-area spectral model—the Regional Spectral Model—developed at the National Centers for Environmental Prediction is used to prepare daily quantitative precipitation forecasts out to 48 h for the Tennessee and Cumberland River basins in ...

Qi Mao; Stephen F. Mueller; Hann-Ming Henry Juang

2000-02-01T23:59:59.000Z

170

Comparison of Cumulus Parameterizations and Entrainment Using Domain-Mean Wind Divergence in a Regional Model  

Science Conference Proceedings (OSTI)

Several different cumulus parameterizations are compared in a 10-day regional model simulation over the tropical Americas in northern summer. A simple bulk diagnostic test is devised, comparing the model's preferred domain-mean wind divergence ...

Brian E. Mapes; Thomas T. Warner; Mei Xu; David J. Gochis

2004-06-01T23:59:59.000Z

171

A One-Level, Mesoscale Model for Diagnosing Surface Winds in Mountainous and Coastal Regions  

Science Conference Proceedings (OSTI)

This paper describes a one-level, sigma-coordinate, mesoscale model suitable for diagnosing surface winds in mountainous and coastal regions. The model requires only modest computer resources and needs little data for initialization. Energy and ...

Clifford F. Mass; David P. Dempsey

1985-07-01T23:59:59.000Z

172

Investigation of Wave Growth and Decay in the SWAN Model: Three Regional-Scale Applications  

Science Conference Proceedings (OSTI)

Wave growth and decay characteristics in a typical wave action model [Simulating Waves Nearshore (SWAN)] are investigated in this paper. This study is motivated by generally poor agreement between model results and measurements for a regional-...

W. Erick Rogers; Paul A. Hwang; David W. Wang

2003-02-01T23:59:59.000Z

173

Dual Estimates of the Optimal Plan Model and Regional Market Costs: A Relationship  

Science Conference Proceedings (OSTI)

The relationship between linear programming dual estimates for the optimal production plan model and real regional market costs is studied. A two-stage linear programming model is necessary for exact approximation of cost allocation in analyzing with ...

Yu. M. Tsodikov; Ya. Yu. Tsodikova

2001-04-01T23:59:59.000Z

174

Streamflow Data from Small Basins: A Challenging Test to High-Resolution Regional Climate Modeling  

Science Conference Proceedings (OSTI)

Land surface models and large-scale hydrological models provide the basis for studying impacts of climate and anthropogenic changes on continental- to regional-scale hydrology. Hence, there is a need for comparison and validation of simulated ...

Kerstin Stahl; Lena M. Tallaksen; Lukas Gudmundsson; Jens H. Christensen

2011-10-01T23:59:59.000Z

175

Addressing the Issue of Systematic Errors in a Regional Climate Model  

Science Conference Proceedings (OSTI)

A methodology is proposed in which a few prognostic variables of a regional climate model (RCM) are strongly constrained at certain wavelengths to what is prescribed from the bias-corrected atmospheric general circulation model (AGCM; driver ...

Vasubandhu Misra

2007-03-01T23:59:59.000Z

176

Thermodynamics of the Madden–Julian Oscillation in a Regional Model with Constrained Moisture  

Science Conference Proceedings (OSTI)

To identify the main thermodynamic processes that sustain the Madden–Julian oscillation (MJO), an eddy available potential energy budget analysis is performed on a regional model simulation with moisture constrained by observations. The model ...

Samson Hagos; L. Ruby Leung; Jimy Dudhia

2011-09-01T23:59:59.000Z

177

Implementation of an Urban Parameterization Scheme into the Regional Climate Model COSMO-CLM  

Science Conference Proceedings (OSTI)

As the nonhydrostatic regional model of the Consortium for Small-Scale Modelling in Climate Mode (COSMO-CLM) is increasingly employed for studying the effects of urbanization on the environment, the authors extend its surface-layer ...

Kristina Trusilova; Barbara Früh; Susanne Brienen; Andreas Walter; Valéry Masson; Grégoire Pigeon; Paul Becker

2013-10-01T23:59:59.000Z

178

Large-Scale Atmospheric Forcing by Southeast Pacific Boundary Layer Clouds: A Regional Model Study  

Science Conference Proceedings (OSTI)

A regional model is used to study the radiative effect of boundary layer clouds over the southeast Pacific on large-scale atmosphere circulation during August–October 1999. With the standard settings, the model simulates reasonably well the large-...

Yuqing Wang; Shang-Ping Xie; Bin Wang; Haiming Xu

2005-04-01T23:59:59.000Z

179

Can a Regional Climate Model Improve the Ability to Forecast the North American Monsoon?  

Science Conference Proceedings (OSTI)

Global climate models are challenged to represent the North American monsoon, in terms of its climatology and interannual variability. To investigate whether a regional atmospheric model can improve warm season forecasts in North America, a ...

Christopher L. Castro; Hsin-I Chang; Francina Dominguez; Carlos Carrillo; Jae-Kyung Schemm; Hann-Ming Henry Juang

2012-12-01T23:59:59.000Z

180

The Representation of Atmospheric Motion in Models of Regional-Scale Air Pollution  

Science Conference Proceedings (OSTI)

A method is developed for generating ensembles of wind fields for use in regional scale (1000 km) models of transport and diffusion. The underlying objective is a methodology for representing atmospheric motion in applied air pollution models ...

Robert G. Lamb; Saroj K. Hati

1987-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
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181

An Application of an Explicit Microphysics Mesoscale Model to a Regional Icing Event  

Science Conference Proceedings (OSTI)

A hydrostatic regional prediction model is modified to permit the existence of both liquid and ice hydrometeors within the same grid volume. The modified model includes an efficient ice-water saturation adjustment and a simple procedure to create ...

George D. Modica; Scot T. Heckman; Roy M. Rasmussen

1994-01-01T23:59:59.000Z

182

Simulation of Summer Monsoon Climate over East Asia with an NCAR Regional Climate Model  

Science Conference Proceedings (OSTI)

A summertime season climate over east Asia is simulated with a regional climate model (RegCM) developed at the National Center for Atmospheric Research (NCAR) to validate the model's capability to produce the basic characteristics of monsoon ...

Yongqiang Liu; Filippo Giorgi; Warren M. Washington

1994-10-01T23:59:59.000Z

183

A Diagnostic Analysis of a Long-Term Regional Air Pollutant Transport Model  

Science Conference Proceedings (OSTI)

Predicted concentrations from the Regional Air Pollutant Transport (RAPT) model are compared with the corresponding observed values of sulfate, and the results used to define strengths and weaknesses in the model formulation.

Daniel J. McNaughton; Carl M. Berkowitz; Robert C. Williams

1981-07-01T23:59:59.000Z

184

A Semi-Implicit Semi-Lagrangian Regional Climate Model: The Canadian RCM  

Science Conference Proceedings (OSTI)

A new regional climate model (RCM) is presented in this paper and its performance is investigated through a pair of 60-day simulations. This new model is based on the dynamical formulation of the Cooperative Centre for Research in Mesometeorology ...

Daniel Caya; René Laprise

1999-03-01T23:59:59.000Z

185

A Vertically Nested Regional Numerical Weather Prediction Model with Second-Order Closure Physics  

Science Conference Proceedings (OSTI)

The model we describe involves a unique strategy in which a high vertical resolution grid is nested within the coarse vertical resolution grid of a regional numerical weather prediction (NWP) model. Physics computations performed on the high ...

Stephen D. Burk; William T. Thompson

1989-11-01T23:59:59.000Z

186

Modeling Regional Electricity Generation - U.S. Energy Information ...  

U.S. Energy Information Administration (EIA)

... satisfactorily for historical 2004 and preliminary 2006 data The model is capable of capturing seasonal fluctuations Shape of load curves (max and min ...

187

Regional & Global Climate Modeling (RGCM) Program | U.S. DOE...  

Office of Science (SC) Website

System Research (ASR) Program Data Management Earth System Modeling (ESM) Program William R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Integrated Assessment of...

188

Axisymmetric Circulations Forced by Heat and Momentum Sources: A Simple Model Applicable to the Venus Atmosphere  

Science Conference Proceedings (OSTI)

The parametric behavior of an axially symmetric circulation induced by heat and momentum sources is analyzed in the context of a simple Boussinesq model. Implications for the Venus atmosphere are examined in the light of recent data.

Arthur Y. Hou

1984-12-01T23:59:59.000Z

189

Toward a Physically Based Gravity Wave Source Parameterization in a General Circulation Model  

Science Conference Proceedings (OSTI)

Middle atmospheric general circulation models (GCMs) must employ a parameterization for small-scale gravity waves (GWs). Such parameterizations typically make very simple assumptions about gravity wave sources, such as uniform distribution in ...

Jadwiga H. Richter; Fabrizio Sassi; Rolando R. Garcia

2010-01-01T23:59:59.000Z

190

Single- and Dual-Source Modeling of Surface Energy Fluxes with Radiometric Surface Temperature  

Science Conference Proceedings (OSTI)

Single- and dual-source models of the surface energy transfer across the soil-vegetation-atmosphere interface were used in conjunction with remotely sensed surface temperature for computing the surface energy balance over heterogeneous surfaces. ...

W. P. Kustas; K. S. Humes; J. M. Norman; M. S. Moran

1996-01-01T23:59:59.000Z

191

Sources of Eddy Energy Simulated by a Model of the Northeast Pacific Ocean  

Science Conference Proceedings (OSTI)

This paper examines the energy sources for eddy variability in the Gulf of Alaska using a numerical model and a novel form of data assimilation referred to as spectral nudging. Spectral nudging is distinguished from conventional nudging by its ...

Jennifer Shore; Michael W. Stacey; Daniel G. Wright

2008-10-01T23:59:59.000Z

192

Modeling and Parameterization of Near-Source Diffusion in Weak Winds  

Science Conference Proceedings (OSTI)

A critical assessment is made of several different approaches that can be used for modeling near-source diffusion in weak winds, including the calm condition. For the convective boundary layer, the statistical theory approach is used in ...

S. Pal Arya

1995-05-01T23:59:59.000Z

193

Regional forecasting with global atmospheric models; Third year report  

SciTech Connect

This report was prepared by the Applied Research Corporation (ARC), College Station, Texas, under subcontract to Pacific Northwest Laboratory (PNL) as part of a global climate studies task. The task supports site characterization work required for the selection of a potential high-level nuclear waste repository and is part of the Performance Assessment Scientific Support (PASS) Program at PNL. The work is under the overall direction of the Office of Civilian Radioactive Waste Management (OCRWM), US Department of Energy Headquarters, Washington, DC. The scope of the report is to present the results of the third year`s work on the atmospheric modeling part of the global climate studies task. The development testing of computer models and initial results are discussed. The appendices contain several studies that provide supporting information and guidance to the modeling work and further details on computer model development. Complete documentation of the models, including user information, will be prepared under separate reports and manuals.

Crowley, T.J.; North, G.R.; Smith, N.R. [Applied Research Corp., College Station, TX (United States)

1994-05-01T23:59:59.000Z

194

Bayesian modeling of source confusion in LISA data  

E-Print Network (OSTI)

One of the greatest data analysis challenges for the Laser Interferometer Space Antenna (LISA) is the need to account for a large number of gravitational wave signals from compact binary systems expected to be present in the data. We introduce the basis of a Bayesian method that we believe can address this challenge, and demonstrate its effectiveness on a simplified problem involving one hundred synthetic sinusoidal signals in noise. We use a reversible jump Markov chain Monte Carlo technique to infer simultaneously the number of signals present, the parameters of each identified signal, and the noise level. Our approach therefore tackles the detection and parameter estimation problems simultaneously, without the need to evaluate formal model selection criteria, such as the Akaike Information Criterion or explicit Bayes factors. The method does not require a stopping criterion to determine the number of signals, and produces results which compare very favorably with classical spectral techniques.

Richard Umstätter; Nelson Christensen; Martin Hendry; Renate Meyer; Vimal Simha; John Veitch; Sarah Vigeland; Graham Woan

2005-06-09T23:59:59.000Z

195

The development of a regional geomagnetic daily variation model using neural networks  

E-Print Network (OSTI)

The development of a regional geomagnetic daily variation model using neural networks P. R. Sutclie: 28 June 1999 / Accepted: 20 July 1999 Abstract. Global and regional geomagnetic ®eld models give the components of the geomagnetic ®eld as func- tions of position and epoch; most utilise a polynomial or Fourier

Paris-Sud XI, Université de

196

Improving the simulation of the West African Monsoon using the MIT Regional Climate Model  

Science Conference Proceedings (OSTI)

This paper presents an evaluation of the performance of the MIT Regional Climate Model (MRCM) in simulating the West African Monsoon. MRCM is built on Regional Climate Model Version 3 (RegCM3) but with several improvements; including coupling of ...

Eun-Soon Im; Rebecca L. Gianotti; Elfatih A. B. Eltahir

197

Supplemental heat rejection in ground source heat pumps for residential houses in Texas and other semi-arid regions.  

E-Print Network (OSTI)

??Ground source heat pumps (GSHP) are efficient alternatives to air source heat pumps to provide heating and cooling for conditioned buildings. GSHPs are widely deployed… (more)

Balasubramanian, Siddharth

2012-01-01T23:59:59.000Z

198

Fog Forecasting for the Southern Region: A Conceptual Model Approach  

Science Conference Proceedings (OSTI)

The prediction of fog occurrence, extent, duration, and intensity remains difficult despite improvements in numerical guidance and modeling of the fog phenomenon. This is because of the dependency of fog on microphysical and mesoscale processes ...

Paul J. Croft; Russell L. Pfost; Jeffrey M. Medlin; G. Alan Johnson

1997-09-01T23:59:59.000Z

199

Regional Climate–Weather Research and Forecasting Model  

Science Conference Proceedings (OSTI)

The CWRF is developed as a climate extension of the Weather Research and Forecasting model (WRF) by incorporating numerous improvements in the representation of physical processes and integration of external (top, surface, lateral) forcings that are ...

Xin-Zhong Liang; Min Xu; Xing Yuan; Tiejun Ling; Hyun I. Choi; Feng Zhang; Ligang Chen; Shuyan Liu; Shenjian Su; Fengxue Qiao; Yuxiang He; Julian X. L. Wang; Kenneth E. Kunkel; Wei Gao; Everette Joseph; Vernon Morris; Tsann-Wang Yu; Jimy Dudhia; John Michalakes

2012-09-01T23:59:59.000Z

200

Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett,  

Open Energy Info (EERE)

Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett, Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown References J. W. Pritchett (2004) Finding Hidden Geothermal Resources In The Basin And Range Using Electrical Survey Techniques- A Computational Feasibility Study Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Northern_Basin_%26_Range_Region_(Pritchett,_2004)&oldid=401423"

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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201

Two-Way Particle-Tracking Model for Specifying Sources of Drifting Objects: Application to the East China Sea Shelf  

Science Conference Proceedings (OSTI)

The two-way Lagrangian particle-tracking model (PTM) is proposed for specifying sources of objects drifting with random-walk processes on the sea surface. First, to determine object source candidates, modeled particles are released from the point ...

Atsuhiko Isobe; Shin’ichiro Kako; Pil-Hun Chang; Takeshi Matsuno

2009-08-01T23:59:59.000Z

202

The Analytical Repository Source-Term (AREST) model: Description and documentation  

Science Conference Proceedings (OSTI)

The geologic repository system consists of several components, one of which is the engineered barrier system. The engineered barrier system interfaces with natural barriers that constitute the setting of the repository. A model that simulates the releases from the engineered barrier system into the natural barriers of the geosphere, called a source-term model, is an important component of any model for assessing the overall performance of the geologic repository system. The Analytical Repository Source-Term (AREST) model being developed is one such model. This report describes the current state of development of the AREST model and the code in which the model is implemented. The AREST model consists of three component models and five process models that describe the post-emplacement environment of a waste package. All of these components are combined within a probabilistic framework. The component models are a waste package containment (WPC) model that simulates the corrosion and degradation processes which eventually result in waste package containment failure; a waste package release (WPR) model that calculates the rates of radionuclide release from the failed waste package; and an engineered system release (ESR) model that controls the flow of information among all AREST components and process models and combines release output from the WPR model with failure times from the WPC model to produce estimates of total release. 167 refs., 40 figs., 12 tabs.

Liebetrau, A.M.; Apted, M.J.; Engel, D.W.; Altenhofen, M.K.; Strachan, D.M.; Reid, C.R.; Windisch, C.F.; Erikson, R.L.; Johnson, K.I.

1987-10-01T23:59:59.000Z

203

Merging Models and Biomonitoring Data to Characterize Sources andPathways of Human Exposure to Organophosphorous Pesticides in the SalinasValley of California  

SciTech Connect

By drawing on human biomonitoring data and limited environmental samples together with outputs from the CalTOX multimedia, multipathway source-to-dose model, we characterize cumulative intake of organophosphorous (OP) pesticides in an agricultural region of California. We assemble regional OP pesticide use, environmental sampling, and biological tissue monitoring data for a large and geographically dispersed population cohort of 592 pregnant Latina women in California (the CHAMACOS cohort). We then use CalTOX with regional pesticide usage data to estimate the magnitude and uncertainty of exposure and intake from local sources. We combine model estimates of intake from local sources with food intake based on national residue data to estimate for the CHAMACOS cohort cumulative median OP intake, which corresponds to expected levels of urinary dialkylphosphate (DAP) metabolite excretion for this cohort. From these results we develop premises about relative contributions from different sources and pathways of exposure. We evaluate these premises by comparing the magnitude and variation of DAPs in the CHAMACOS cohort with the whole U.S. population using data from the National Health and Nutrition Evaluation Survey (NHANES). This comparison supports the premise that in both populations diet is the common and dominant exposure pathway. Both the model results and biomarker comparison supports the observation that the CHAMACOS population has a statistically significant higher intake of OP pesticides that appears as an almost constant additional dose among all participants. We attribute the magnitude and small variance of this intake to non-dietary exposure in residences from local sources.

McKone, Thomas E.; Castorina, Rosemary; Kuwabara, Yu; Harnly,Martha E.; Eskenazi, Brenda; Bradman, Asa

2006-06-01T23:59:59.000Z

204

Modeling-Computer Simulations At General Us Region (Goff & Decker, 1983) |  

Open Energy Info (EERE)

Us Region (Goff & Decker, 1983) Us Region (Goff & Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At General Us Region (Goff & Decker, 1983) Exploration Activity Details Location General Us Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_General_Us_Region_(Goff_%26_Decker,_1983)&oldid=38761

205

Estimating the Effects on the Regional Precipitation Climate in a Semiarid Region Caused by an Artificial Lake Using a Mesoscale Model  

Science Conference Proceedings (OSTI)

The effects on the regional precipitation climate by the construction of an artificial lake, in a semiarid region are studied. The study is performed using a mesoscale model to identify the larger-scale meteorological conditions when ...

Leif Enger; Michael Tjernström

1991-02-01T23:59:59.000Z

206

Reactive transport in aquatic ecosystems: Rapid model prototyping in the open source software R  

Science Conference Proceedings (OSTI)

The concentrations of many natural compounds are altered by chemical and biological transformations, and physical processes such as adsorption and transport. Their fate can be predicted using reactive transport models that describe reaction and advective ... Keywords: Model, Open source, R, Reactive transport, Software

Karline Soetaert; Filip Meysman

2012-06-01T23:59:59.000Z

207

A Linear Model Study of Cross-Equatorial Flow Forced by Summer Monsoon Heat Sources  

Science Conference Proceedings (OSTI)

A linear model of the steady response of a stratified fluid to isolated heat sources on a sphere is developed. The model is used to examine the response to diabatic heating associated with summer monsoon precipitation in India and to low-level ...

Keith D. Sashegyi; John E. Geisler

1987-07-01T23:59:59.000Z

208

PRISM 2.0: Regional Energy and Economic Model Development and Initial Application, US-REGEN Model Documentation  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute (EPRI) has developed a new energy-economy model of the United States under the PRISM 2.0 project called the U.S. Regional Economy, Greenhouse Gas, and Energy (US-REGEN) Model. The model combines a detailed dispatch and capacity expansion model of the United States electric sector with a high-level dynamic computable general equilibrium (CGE) model of the United States economy. ...

2013-09-17T23:59:59.000Z

209

Modeling-Computer Simulations At U.S. West Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Modeling-Computer Simulations At U.S. West Region Modeling-Computer Simulations At U.S. West Region (Laney, 2005) Exploration Activity Details Location U.S. West Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown Notes Characterization and Conceptual Modeling of Magmatically-Heated and Deep-Circulation, High-Temperature Hydrothermal Systems in the Basin and Range and Cordilleran United States, Moore, Nash, Nemcok, Lutz, Norton, Kaspereit, Berard, van de Putte, Johnson and Deymonaz. Utilizing a wealth of formerly proprietary subsurface samples and datasets for exemplary high-temperature western U.S. geothermal systems, develop and publish detailed and refined new conceptual and numerical hydrothermal-history models of fundamental scientific import but, more importantly, of use to

210

Modeling regional end user price/cost relationships in a widespread interconnected power system  

SciTech Connect

A combined programming and regression modeling approach is developed to analyze regional retail price/cost relationships for a widespread interconnected power system characterized by low population density and uniform (regulated) retail tariffs. The programming model is designed to calculate on the hour the delivered cost of electricity from 5 thermal power stations and one pumped storage hydrostation to end users in 8 distribution regions. A simultaneous equation regression model then analyses the link between retail prices charged end users, regional demand and supply characteristics, industry financial objectives and departures from economically efficient pricing. The electricity supply industry in Queensland Australia is used as a framework.

Tamaschke, R.; Docwra, G.; Stillman, R. [Univ. of Queensland, Brisbane, Queensland (Australia)

1995-11-01T23:59:59.000Z

211

Principal UncertaintiesPrincipal Uncertainties Their Representation in the Regional Portfolio ModelTheir Representation in the Regional Portfolio Model  

E-Print Network (OSTI)

Electricity RequirementsElectricity Requirements Council Load Forecast and Portfolio Model Range 10000 15000 and Conservation Council for the Load Forecasting Advisory Committee Friday June 27, 2008 2 Overview Electricity RequirementsElectricity Requirements 5th Plan Non-DSI Price Effects Sales Forecasts 12000 14000

212

Tectonic controls on magmatism in The Geysers--Clear Lake region: Evidence from new geophysical models  

DOE Green Energy (OSTI)

In order to study magmatism and geothermal systems in the Geysers-Clear Lake region, the authors developed a detailed three-dimensional tomographic velocity model based on local earthquakes. This high-resolution model resolves the velocity structure of the crust in the region to depths of approximately 12 km. The most significant velocity contrasts in The Geysers-Clear Lake region occur in the steam production area, where high velocities are associated with a Quaternary granite pluton, and in the Mount Hannah region, where low velocities occur in a 5-km-thick section of Mesozoic argillites. In addition, a more regional tomographic model was developed using traveltimes from earthquakes covering most of northern California. This regional model sampled the whole crust, but at a lower resolution than the local model. No large silicic magma chamber is noted in either the local or regional tomographic models. A three-dimensional gravity model also has ben developed in the area of the tomographic imaging. The gravity model demonstrates that all density contrasts can be accounted for in the upper 5--7 km of the crust. Two-dimensional magnetotelluric models of data from a regional east-west profile indicate high resistivities associated with the granitic pluton in The Geysers production area and low resistivities in the low-velocity section of Mesozoic argillites near Mount Hannah. No indication of midcrustal magma bodies is present in the magnetotelluric data. The geophysical models, seismicity patterns, distribution of volcanic vents, heat flow, and other data indicate that small, young intrusive bodies that were injected along a northeast trend from The Geysers to Clear Lake probably control the thermal regime.

Stanley, W.D.; Benz, H.M.; Villasenor, A.; Rodriguez, B.D. [Geological Survey, Denver, CO (United States). Denver Federal Center] [Geological Survey, Denver, CO (United States). Denver Federal Center; Walters, M.A. [CalEnergy Corp., Ridgecrest, CA (United States)] [CalEnergy Corp., Ridgecrest, CA (United States)

1998-09-01T23:59:59.000Z

213

Analysis of Regional Climate Model Results for Simulations of Future Climates  

Science Conference Proceedings (OSTI)

Contemporary global climate models produce results that are too coarse to provide the level of detail required to evaluate environmental, social, and economic impacts of global climate change. High-resolution limited-area models (regional climate models) nested within the global model output have been used to create physically and spatially consistent climates with high spatial resolution. This report evaluates the effectiveness of these models.

2002-04-08T23:59:59.000Z

214

Regional load-curve models: scenario and forecast using the DRI model. Final report. [Forecasts of electric power loads in 32 US regions  

SciTech Connect

Regional load curve models were constructed for 32 regions that have been created by aggregating hourly load data from 146 electric utilities. These utilities supply approximately 95% of the electricity consumed in the continental US. The 32 models forecast electricity demands by hour, 8784 regional load forecasts per year. Because projections are made for each hour in the year, contemporaneous forecasts are available for peak demands, megawatt hour demands, load factors, load duration curves, and typical load shapes. The forecast scenario is described and documented in this volume and the forecast resulting from the use of this scenario is presented. The highlights of this forecast are two observations: (1) peak demands will once again become winter phenomena. By the year 2000, 18 of the 32 regions peak in a winter month as compared with the 8 winter peaking regions in 1977. In the heating season, the model is responsive to the number of heating degree-hours, the penetration rate of electric heating equipment, and the rate at which this space conditioning equipment is utilized, which itself is functionally dependent on the level of real electricity prices and real incomes. Thus, as the penetration rate of electric heating equipment increases, winter season demands grow more rapidly than demands in other seasons and peaks begin to appear in winter months; and (2) load factors begin to increase in the forecast, reversing the trend which began in the early 1960s. Nationally, load factors do not leap upwards, instead they increase gradually from .609 in 1977 to .629 in the year 2000. The improvement is more consequential in some regions, with load factors increasing, at times, by .10 or more. In some regions, load factors continue to decline.

Platt, H.D.

1981-08-01T23:59:59.000Z

215

A multi-region nonlinear age-size structured fish population model  

E-Print Network (OSTI)

The goal of this paper is to present a generic multi-region nonlinear age-size structured fish population model, and to assess its mathematical well-posedness. An initial-boundary-value problem is formulated. Existence and uniqueness of a positive weak solution is proved. Eventually, a comparison result is derived: the population of all regions decreases as the mortality rate increases in at least one region.

Faugeras, Blaise

2010-01-01T23:59:59.000Z

216

Projections of a Wetter Sahel in the Twenty-First Century from Global and Regional Models  

Science Conference Proceedings (OSTI)

Confident regional-scale climate change predictions for the Sahel are needed to support adaptation planning. State-of-the-art regional climate model (RCM) simulations at 90- and 30-km resolutions are run and analyzed along with output from five ...

Edward K. Vizy; Kerry H. Cook; Julien Crétat; Naresh Neupane

2013-07-01T23:59:59.000Z

217

Regional Climate Change in East Asia Simulated by an Interactive Atmosphere–Soil–Vegetation Model  

Science Conference Proceedings (OSTI)

A regional coupled soil–vegetation–atmosphere model is used to study changes and interactions between climate and the ecosystem in East Asia due to increased atmospheric CO2. The largest simulated climate changes are due to the radiative ...

Ming Chen; David Pollard; Eric J. Barron

2004-02-01T23:59:59.000Z

218

Nicaragua-Low-Carbon Energy for Central America: Building a Regional Model  

Open Energy Info (EERE)

Nicaragua-Low-Carbon Energy for Central America: Building a Regional Model Nicaragua-Low-Carbon Energy for Central America: Building a Regional Model Jump to: navigation, search Name Nicaragua-Low-Carbon Energy for Central America: Building a Regional Model Agency/Company /Organization World Watch Institute Sector Energy Focus Area Renewable Energy Topics Background analysis, Implementation, Low emission development planning, Policies/deployment programs Website http://www.worldwatch.org/node Country Nicaragua Central America References Low-Carbon Energy for Central America: Building a Regional Model[1] Overview "This project will design a unified low-carbon development strategy for Central America through the use of renewable energy and energy efficiency maps, followed by technical, economic, and social feasibility studies for

219

Low-Carbon Energy for Central America: Building a Regional Model | Open  

Open Energy Info (EERE)

Low-Carbon Energy for Central America: Building a Regional Model Low-Carbon Energy for Central America: Building a Regional Model Jump to: navigation, search Name Low-Carbon Energy for Central America: Building a Regional Model Agency/Company /Organization World Watch Institute Sector Energy Focus Area Renewable Energy Topics Background analysis, Implementation, Low emission development planning, Policies/deployment programs Website http://www.worldwatch.org/node Country Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama Central America, Central America, Central America, Central America, Central America, Central America, Central America References Low-Carbon Energy for Central America: Building a Regional Model[1] Overview "This project will design a unified low-carbon development strategy for

220

Honduras-Low-Carbon Energy for Central America: Building a Regional Model |  

Open Energy Info (EERE)

Honduras-Low-Carbon Energy for Central America: Building a Regional Model Honduras-Low-Carbon Energy for Central America: Building a Regional Model Jump to: navigation, search Name Honduras-Low-Carbon Energy for Central America: Building a Regional Model Agency/Company /Organization World Watch Institute Sector Energy Focus Area Renewable Energy Topics Background analysis, Implementation, Low emission development planning, Policies/deployment programs Website http://www.worldwatch.org/node Country Honduras Central America References Low-Carbon Energy for Central America: Building a Regional Model[1] Overview "This project will design a unified low-carbon development strategy for Central America through the use of renewable energy and energy efficiency maps, followed by technical, economic, and social feasibility studies for

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Belize-Low-Carbon Energy for Central America: Building a Regional Model |  

Open Energy Info (EERE)

Belize-Low-Carbon Energy for Central America: Building a Regional Model Belize-Low-Carbon Energy for Central America: Building a Regional Model Jump to: navigation, search Name Belize-Low-Carbon Energy for Central America: Building a Regional Model Agency/Company /Organization World Watch Institute Sector Energy Focus Area Renewable Energy Topics Background analysis, Implementation, Low emission development planning, Policies/deployment programs Website http://www.worldwatch.org/node Country Belize Central America References Low-Carbon Energy for Central America: Building a Regional Model[1] Overview "This project will design a unified low-carbon development strategy for Central America through the use of renewable energy and energy efficiency maps, followed by technical, economic, and social feasibility studies for

222

Costa Rica-Low-Carbon Energy for Central America: Building a Regional Model  

Open Energy Info (EERE)

Costa Rica-Low-Carbon Energy for Central America: Building a Regional Model Costa Rica-Low-Carbon Energy for Central America: Building a Regional Model Jump to: navigation, search Name Costa-Rica-Low-Carbon Energy for Central America: Building a Regional Model Agency/Company /Organization World Watch Institute Sector Energy Focus Area Renewable Energy Topics Background analysis, Implementation, Low emission development planning, Policies/deployment programs Website http://www.worldwatch.org/node Country Costa Rica Central America References Low-Carbon Energy for Central America: Building a Regional Model[1] Overview "This project will design a unified low-carbon development strategy for Central America through the use of renewable energy and energy efficiency maps, followed by technical, economic, and social feasibility studies for

223

Coupling of Integrated Biosphere Simulator to Regional Climate Model Version 3  

Science Conference Proceedings (OSTI)

A description of the coupling of Integrated Biosphere Simulator (IBIS) to Regional Climate Model version 3 (RegCM3) is presented. IBIS introduces several key advantages to RegCM3, most notably vegetation dynamics, the coexistence of multiple ...

Jonathan M. Winter; Jeremy S. Pal; Elfatih A. B. Eltahir

2009-05-01T23:59:59.000Z

224

A Regional Ocean–Atmosphere Model for Eastern Pacific Climate: Toward Reducing Tropical Biases  

Science Conference Proceedings (OSTI)

The tropical Pacific Ocean is a climatically important region, home to El Niño and the Southern Oscillation. The simulation of its climate remains a challenge for global coupled ocean–atmosphere models, which suffer large biases especially in ...

Shang-Ping Xie; Toru Miyama; Yuqing Wang; Haiming Xu; Simon P. de Szoeke; R. Justin O. Small; Kelvin J. Richards; Takashi Mochizuki; Toshiyuki Awaji

2007-04-01T23:59:59.000Z

225

Inclusion of a TKE Boundary Layer Parameterization in the Canadian Regional Finite-Element Model  

Science Conference Proceedings (OSTI)

The formulation of the regional model recently implemented by the Atmospheric Environment Service of Canada for its operational 48 h NWP forecasts is presented. The emphasis is put on the parameterization of the physical processes, especially ...

R. Benoit; J. Côté; J. Mailhot

1989-08-01T23:59:59.000Z

226

The Soil–Precipitation Feedback: A Process Study with a Regional Climate Model  

Science Conference Proceedings (OSTI)

Month-long integrations with a regional climate model covering Europe and the Northern Atlantic are utilized to study the sensitivity of the summertime European precipitation climate with respect to the continental-scale soil moisture content. ...

Christoph Schär; Daniel Lüthi; Urs Beyerle; Erdmann Heise

1999-03-01T23:59:59.000Z

227

Investigating the Mechanisms of Diurnal Rainfall Variability Using a Regional Climate Model  

Science Conference Proceedings (OSTI)

This study investigates the ability of a regional climate model (RCM) to simulate the diurnal cycle of precipitation over southeast Australia, to provide a basis for understanding the mechanisms that drive diurnal variability. When compared with ...

Jason P. Evans; Seth Westra

2012-10-01T23:59:59.000Z

228

Environment and the Lifetime of Tropical Deep Convection in a Cloud-Permitting Regional Model Simulation  

Science Conference Proceedings (OSTI)

By applying a cloud tracking algorithm to tropical convective systems in a simulated a regional high resolution model simulation, this study documents the environmental conditions before and after convective systems are initiated over ocean and ...

Samson Hagos; Zhe Feng; Sally McFarlane; L. Ruby Leung

229

Implementation of an urban parameterization scheme into the regional climate model COSMO-CLM.  

Science Conference Proceedings (OSTI)

As the non-hydrostatic regional climate model COSMO-CLM is increasingly employed for studying effects of urbanization on the environment we extend its surface-layer parameterization by the Town Energy Budget (TEB) parameterization (Masson 2000) ...

Kristina Trusilova; Barbara Früh; Susanne Brienen; Andreas Walter; Valéry Masson; Grégoire Pigeon; Paul Becker

230

Operational Implementation of the Fritsch–Chappell Convective Scheme in the 24-km Canadian Regional Model  

Science Conference Proceedings (OSTI)

The objective and subjective evaluations that led to the implementation of the Fritsch and Chappell (FC) convective scheme in the new 24-km Canadian operational regional model are described in this study. Objective precipitation scores computed ...

Stéphane Bélair; André Méthot; Jocelyn Mailhot; Bernard Bilodeau; Alain Patoine; Gérard Pellerin; Jean Côté

2000-06-01T23:59:59.000Z

231

Coupling of Integrated Biosphere Simulator to Regional Climate Model Version 3  

E-Print Network (OSTI)

A description of the coupling of Integrated Biosphere Simulator (IBIS) to Regional Climate Model version 3 (RegCM3) is presented. IBIS introduces several key advantages to RegCM3, most notably vegetation dynamics, the ...

Winter, Jonathan (Jonathan Mark)

232

Modeling Ozone Formation and Transport in the Cascadia Region of the Pacific Northwest  

Science Conference Proceedings (OSTI)

The rapidly growing Cascadia region of the Pacific Northwest, consisting of western Washington, Oregon, and southwestern British Columbia, has experienced surface ozone concentrations that exceed federally mandated standards. A modeling system ...

Mike Barna; Brian Lamb; Susan O’Neill; Hal Westberg; Cris Figueroa-Kaminsky; Sally Otterson; Clint Bowman; Jennifer DeMay

2000-03-01T23:59:59.000Z

233

A Quasi-Lagrangian Regional Model Designed for Operational Weather Prediction  

Science Conference Proceedings (OSTI)

A regional numerical weather prediction model is designed using the quasi-Lagrangian method for operational forecasting of synoptic and mesoscale disturbances. The nonlinear advective terms and the total forcing experienced by a fluid parcel are ...

Mukut B. Mathur

1983-10-01T23:59:59.000Z

234

Environment and the Lifetime of Tropical Deep Convection in a Cloud-Permitting Regional Model Simulation  

Science Conference Proceedings (OSTI)

By applying a cloud-tracking algorithm to tropical convective systems in a regional high-resolution model simulation, this study documents the environmental conditions before and after convective systems are initiated over ocean and land by ...

Samson Hagos; Zhe Feng; Sally McFarlane; L. Ruby Leung

2013-08-01T23:59:59.000Z

235

Improving Convective Precipitation Forecasting through Assimilation of Regional Lightning Measurements in a Mesoscale Model  

Science Conference Proceedings (OSTI)

A technique developed for assimilating regional lightning measurements into a meteorological model is presented in this paper. The goal is to assess the effectiveness of cloud-to-ground (CG) lightning information for improving the convective ...

Anastasios Papadopoulos; Themis G. Chronis; Emmanouil N. Anagnostou

2005-07-01T23:59:59.000Z

236

A Multiscale Remote Sensing Model for Disaggregating Regional Fluxes to Micrometeorological Scales  

Science Conference Proceedings (OSTI)

Disaggregation of regional-scale (103 m) flux estimates to micrometeorological scales (101–102 m) facilitates direct comparison between land surface models and ground-based observations. Inversely, it also provides a means for upscaling flux-...

Martha C. Anderson; J. M. Norman; John R. Mecikalski; Ryan D. Torn; William P. Kustas; Jeffrey B. Basara

2004-04-01T23:59:59.000Z

237

Modeling Regional Vegetation NPP Variations and Their Relationships with Climatic Parameters in Wuhan, China  

Science Conference Proceedings (OSTI)

Net primary productivity (NPP) is an important component of the carbon cycle and a key indicator of ecosystem performance. The aim of this study is to construct a more accurate regional vegetation NPP estimation model and explore the relationship ...

Lunche Wang; Wei Gong; Yingying Ma; Miao Zhang

2013-05-01T23:59:59.000Z

238

Sensitivity Study of Regional Climate Model Simulations to Large-Scale Nudging Parameters  

Science Conference Proceedings (OSTI)

Previous studies with nested regional climate models (RCMs) have shown that large-scale spectral nudging (SN) seems to be a powerful method to correct RCMs’ weaknesses such as internal variability, intermittent divergence in phase space (IDPS), ...

Adelina Alexandru; Ramon de Elia; René Laprise; Leo Separovic; Sébastien Biner

2009-05-01T23:59:59.000Z

239

Ability to Forecast Regional Soil Moisture with a Distributed Hydrological Model Using ECMWF Rainfall Forecasts  

Science Conference Proceedings (OSTI)

This study mimics an online forecast system to provide nine day-ahead forecasts of regional soil moisture. It uses modified ensemble rainfall forecasts from the numerical weather prediction model of the European Centre for Medium-Range Weather ...

J. M. Schuurmans; M. F. P. Bierkens

2009-04-01T23:59:59.000Z

240

Assessment of Roughness Length Schemes Implemented within the Noah Land Surface Model for High Altitude Regions  

Science Conference Proceedings (OSTI)

Current land surface models still have difficulties with producing reliable surface heat fluxes and skin temperature (Tsfc) estimates for high altitude regions, which may be addressed via adequate parameterization of the roughness lengths for ...

Donghai Zheng; Rogier Van Der Velde; Zhongbo Su; Martijn J. Booij; Arjen Y. Hoekstra

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Recent Greenland Accumulation Estimated from Regional Climate Model Simulations and Ice Core Analysis  

Science Conference Proceedings (OSTI)

The accumulation defined as “precipitation minus evaporation” over Greenland has been simulated with the high-resolution limited-area regional climate model HIRHAM4 applied over an Arctic integration domain. This simulation is compared with a ...

K. Dethloff; M. Schwager; J. H. Christensen; S. Kiilsholm; A. Rinke; W. Dorn; F. Jung-Rothenhäusler; H. Fischer; S. Kipfstuhl; H. Miller

2002-10-01T23:59:59.000Z

242

Mesoscale Model Simulations of Three Heavy Precipitation Events in the Western Mediterranean Region  

Science Conference Proceedings (OSTI)

A mesoscale numerical model with parameterized moist convection is applied to three cases involving heavy rainfall in the western Mediterranean region. Forecast precipitation fields, although not perfect when compared to the observations of ...

Romualdo Romero; Clemente Ramis; Sergio Alonso; Charles A. Doswell III; David J. Stensrud

1998-07-01T23:59:59.000Z

243

Multimodel Combination by a Bayesian Hierarchical Model: Assessment of Ice Accumulation over the Oceanic Arctic Region  

Science Conference Proceedings (OSTI)

The performance of general circulation models (GCMs) varies across regions and periods. When projecting into the future, it is therefore not obvious whether to reject or to prefer a certain GCM. Combining the outputs of several GCMs may enhance ...

Malaak Kallache; Elena Maksimovich; Paul-Antoine Michelangeli; Philippe Naveau

2010-10-01T23:59:59.000Z

244

Tests of a Perturbed Physics Ensemble Approach for Regional Climate Modeling  

Science Conference Proceedings (OSTI)

Ensemble simulations were performed with the regional climate model RegCM2 using ranges of plausible values for two parameters in the deep convection scheme. The timescale for release of convective instability was varied through a range of five ...

Zhiwei Yang; Raymond W. Arritt

2002-10-01T23:59:59.000Z

245

Guatemala-Low-Carbon Energy for Central America: Building a Regional Model  

Open Energy Info (EERE)

Guatemala-Low-Carbon Energy for Central America: Building a Regional Model Guatemala-Low-Carbon Energy for Central America: Building a Regional Model Jump to: navigation, search Name Guatemala-Low-Carbon Energy for Central America: Building a Regional Model Agency/Company /Organization World Watch Institute Sector Energy Focus Area Renewable Energy Topics Background analysis, Implementation, Low emission development planning, Policies/deployment programs Website http://www.worldwatch.org/node Country Guatemala Central America References Low-Carbon Energy for Central America: Building a Regional Model[1] Overview "This project will design a unified low-carbon development strategy for Central America through the use of renewable energy and energy efficiency maps, followed by technical, economic, and social feasibility studies for

246

The 1998 Oklahoma–Texas Drought: Mechanistic Experiments with NCEP Global and Regional Models  

Science Conference Proceedings (OSTI)

This study presents results from mechanistic experiments to clarify the origin and maintenance of the Oklahoma–Texas (OK–TX) drought of the 1998 summer, using the National Centers for Environmental Prediction (NCEP) global and regional models. In ...

Song-You Hong; Eugenia Kalnay

2002-05-01T23:59:59.000Z

247

The Lifecycle of Bayesian Network Models Developed for Multi-Source Signature Assessment of Nuclear Programs  

Science Conference Proceedings (OSTI)

The Multi-Source Signatures for Nuclear Programs project, part of Pacific Northwest National Laboratory’s (PNNL) Signature Discovery Initiative, seeks to computationally capture expert assessment of multi-type information such as text, sensor output, imagery, or audio/video files, to assess nuclear activities through a series of Bayesian network (BN) models. These models incorporate knowledge from a diverse range of information sources in order to help assess a country’s nuclear activities. The models span engineering topic areas, state-level indicators, and facility-specific characteristics. To illustrate the development, calibration, and use of BN models for multi-source assessment, we present a model that predicts a country’s likelihood to participate in the international nuclear nonproliferation regime. We validate this model by examining the extent to which the model assists non-experts arrive at conclusions similar to those provided by nuclear proliferation experts. We also describe the PNNL-developed software used throughout the lifecycle of the Bayesian network model development.

Gastelum, Zoe N.; White, Amanda M.; Whitney, Paul D.; Gosink, Luke J.; Sego, Landon H.

2013-06-04T23:59:59.000Z

248

Resource Planning Model: An Integrated Resource Planning and Dispatch Tool for Regional Electric Systems  

Science Conference Proceedings (OSTI)

This report introduces a new capacity expansion model, the Resource Planning Model (RPM), with high spatial and temporal resolution that can be used for mid- and long-term scenario planning of regional power systems. Although RPM can be adapted to any geographic region, the report describes an initial version of the model adapted for the power system in Colorado. It presents examples of scenario results from the first version of the model, including an example of a 30%-by-2020 renewable electricity penetration scenario.

Mai, T.; Drury, E.; Eurek, K.; Bodington, N.; Lopez, A.; Perry, A.

2013-01-01T23:59:59.000Z

249

Hybrid Ground Source Heat Pump System Simulation Using Visual Modeling Tool For Hvacsim  

E-Print Network (OSTI)

This paper presents a simulation of a hybrid ground source heat pump system, performed using a new graphical user interface for HVACSIM+. Hybrid ground source heat pump systems incorporate both ground loop heat exchangers and supplemental heat rejecters, such as cooling towers, cooling ponds, or pavement heating systems. HVACSIM+ capabilities have recently been extended by the addition of ground loop heat exchanger models, water-to-water and waterto-air heat pump models, pavement heating system models, and heat rejection pond models. New component models are discussed and a hybrid ground source heat pump system with heated pavement as a supplemental cooler is simulated using the visual modeling tool. First, though, an introduction to a new graphical user interface for HVACSIM+ is given. The user interface that originally came with the program could not be characterized as user-friendly. The new graphical interface allows users to develop system models by hooking components together. Provisions for controlling the simulation, setting the component parameters, editing the boundary file, and plotting the output are also included.

M. H. Khan; A. Varanasi; J. D. Spitler; D. E. Fisher; R. D. Delahoussaye

2003-01-01T23:59:59.000Z

250

Extreme Precipitation and Temperature over the U.S. Pacific Northwest: A Comparison between Observations, Reanalysis Data, and Regional Models  

Science Conference Proceedings (OSTI)

Extreme precipitation and temperature indices in reanalysis data and regional climate models are compared to station observations. The regional models represent most indices of extreme temperature well. For extreme precipitation, finer grid ...

Valérie Dulière; Yongxin Zhang; Eric P. Salathé Jr.

2011-04-01T23:59:59.000Z

251

How Well Do Regional Climate Models Reproduce Radiation and Clouds in the Arctic? An Evaluation of ARCMIP Simulations  

Science Conference Proceedings (OSTI)

Downwelling radiation in six regional models from the Arctic Regional Climate Model Intercomparison (ARCMIP) project is systematically biased negative in comparison with observations from the Surface Heat Budget of the Arctic Ocean (SHEBA) ...

Michael Tjernström; Joseph Sedlar; Matthew D. Shupe

2008-09-01T23:59:59.000Z

252

Thermodynamic Causes for Future Trends in Heavy Precipitation over Europe Based on an Ensemble of Regional Climate Model Simulations  

Science Conference Proceedings (OSTI)

An extreme-value analysis of projected changes in heavy precipitation is carried out for an ensemble of eight high-resolution regional climate model simulations over the European domain. The consideration of several regional climate models that ...

Christine Radermacher; Lorenzo Tomassini

2012-11-01T23:59:59.000Z

253

Evaluation of tools for renewable energy policy analysis: The ten federal region model  

Science Conference Proceedings (OSTI)

The Energy Policy Act of 1992 establishes a program to support development of renewable energy technologies including a production incentive to public power utilities. Because there is a wide range of possible policy actions that could be taken to increase electric market share for renewables, modeling tools are needed to help make informed decisions regarding future policy. Previous energy modeling tools did not contain the region or infrastructure focus necessary to examine renewable technologies. As a result, the Department of Energy Office of Utility Technologies (OUT) supported the development of tools for renewable energy policy analysis. Three models were developed: The Renewable Energy Penetration (REP) model, which is a spreadsheet model for determining first-order estimates of policy effects for each of the ten federal regions; the Ten Federal Region Model (TFRM), which employs utility capacity expansion and dispatching decision; and the Region Electric Policy Analysis Model (REPAM), which was constructed to allow detailed insight into interactions between policy and technology within an individual region. These Models were developed to provide a suite of fast, personal-computer based policy analysis tools; as one moves from the REP model to the TFRM to the REPAM the level of detail (and complexity) increases. In 1993 a panel was formed to identify model strengths, weaknesses (including any potential biases) and to suggest potential improvements. The panel met in January 1994 to discuss model simulations and to deliberate regarding evaluation outcomes. This report is largely a result of this meeting. This report is organized as follows. It provides a description of the TFRM and summarizes the panel`s findings. Individual chapters examine various aspects of the model: demand and load, capacity expansion, dispatching and production costing, reliability, renewables, storage, financial and regulatory concerns, and environmental effects.

Engle, J.

1994-04-01T23:59:59.000Z

254

Research on the Applicability of Solar Energy-Ground Source Heat Pump in Different Regions of China  

Science Conference Proceedings (OSTI)

The development potential of solar energy resource, cLimatic characteristics and soil temperature conditions are various in different areas of China, which brings some difficulties in the promotion and appLication of solar energy-ground source heat pump ... Keywords: Solar energy-ground source heat pump (GSHP), Solar radiation, Sharacteristics of soil thermal storage, Geographic features

Dongyi Zhou; Chu-ping Shi; Wen-hua Yuan

2011-08-01T23:59:59.000Z

255

A New Method of Source Rock Prediction Based on Q Cluster in YB Region, Northern Sichuan Basin  

Science Conference Proceedings (OSTI)

On the basis of clustering theory, Q cluster is applied to predict source rocks. Distance coefficient and similarity coefficient are calculated, and the shortest distance method is used to analyze the oil shale samples. Then, a prediction map of the ... Keywords: Cluster, Distance coefficient, Similarity coefficient, Shortest distance method, source rock prediction

Peng Bo, Li Guorong, Zhao Yong, Zhao Yingquan, Hu Jingjing, Liao Tai-Ping

2013-06-01T23:59:59.000Z

256

Spatial pattern formation in the Keller-Segel model with a logistic source  

Science Conference Proceedings (OSTI)

This paper deals with a Neumann boundary value problem in a d-dimensional box T^d=(0,@p)^d(d=1,2,3) for the chemotaxis-diffusion-growth model (@? ){U"t=@?(D"u@?U-@gU@?V)+rU(1-U/K),V"t=D"v@?^2V+@aU-@bV, which describes the movement of cells in response ... Keywords: Keller-Segel model, Logistic source, Nonlinear dynamics, Pattern formation

Shengmao Fu, Ji Liu

2013-09-01T23:59:59.000Z

257

Comparison of Aermod and ISCST3 Models for Particulate Emissions from Ground Level Sources  

E-Print Network (OSTI)

Emission factors (EFs) and results from dispersion models are key components in the air pollution regulatory process. The EPA preferred regulatory model changed from ISCST3 to AERMOD in November, 2007. Emission factors are used in conjunction with dispersion models to predict 24-hour concentrations that are compared to National Ambient Air Quality Standards (NAAQS) for determining the required control systems in permitting sources. This change in regulatory models has had an impact on the regulatory process and the industries regulated. In this study, EFs were developed for regulated particulate matter PM10 and PM2.5 from cotton harvesting. Measured concentrations of TSP and PM10 along with meteorological data were used in conjunction with the dispersion models ISCST3 and AERMOD, to determine the emission fluxes from cotton harvesting. The goal of this research was to document differences in emission factors as a consequence of the models used. The PM10 EFs developed for two-row and six-row pickers were 154 + 43 kg/km2 and 425 + 178 kg/km2, respectively. From the comparison between AERMOD and ISCST3, it was observed that AERMOD EFs were 1.8 times higher than ISCST3 EFs for Emission factors (EFs) and results from dispersion models are key components in the air pollution regulatory process. The EPA preferred regulatory model changed from ISCST3 to AERMOD in November, 2007. Emission factors are used in conjunction with dispersion models to predict 24-hour concentrations that are compared to National Ambient Air Quality Standards (NAAQS) for determining the required control systems in permitting sources. This change in regulatory models has had an impact on the regulatory process and the industries regulated. In this study, EFs were developed for regulated particulate matter PM10 and PM2.5 from cotton harvesting. Measured concentrations of TSP and PM10 along with meteorological data were used in conjunction with the dispersion models ISCST3 and AERMOD, to determine the emission fluxes from cotton harvesting. The goal of this research was to document differences in emission factors as a consequence of the models used. The PM10 EFs developed for two-row and six-row pickers were 154 + 43 kg/km2 and 425 + 178 kg/km2, respectively. From the comparison between AERMOD and ISCST3, it was observed that AERMOD EFs were 1.8 times higher than ISCST3 EFs for absence of solar radiation. Using AERMOD predictions of pollutant concentrations off property for regulatory purposes will likely affect a source?s ability to comply with limits set forth by State Air Pollution Regulatory Agencies (SAPRAs) and could lead to inappropriate regulation of the source.

Botlaguduru, Venkata Sai V.

2009-12-01T23:59:59.000Z

258

Determining the Sources of Regional Haze in the Southeastern United States Using the CMAQ Model  

Science Conference Proceedings (OSTI)

A detailed sensitivity analysis was conducted to help to quantify the impacts of various emission control options in terms of potential visibility improvements at class I national parks and wilderness areas in the southeastern United States. ...

M. Talat Odman; Yongtao Hu; Alper Unal; Armistead G. Russell; James W. Boylan

2007-11-01T23:59:59.000Z

259

Analysis of user mobility data sources for multi-user context modeling  

Science Conference Proceedings (OSTI)

Finding the right data source for research is a challenge that many of us face. Although we live in times where 'Open Data' and 'Big Data' have become buzzwords, getting hold of a reasonable size and quality dataset is often hard. When it comes to user ... Keywords: context, dataset, mobility, model, multi-user, situation

Paras Mehta; Agnès Voisard

2012-11-01T23:59:59.000Z

260

Using reactive transport modeling to evaluate the source term at Yucca mountain  

Science Conference Proceedings (OSTI)

The conventional approach of source-term evaluation for performance assessment of nuclear waste repositories uses the dissolution rate of waste form and the solubility of pure phases of radioactive elements to constrain radionuclide concentrations. This ... Keywords: neptunium, nuclear waste, radionuclide solubility, reactive-transport modeling, secondary phases, spent nuclear fuel, uranium

Yueting Chen

2003-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Modeling Heavy-tails in Traffic Sources for Network Performance Evaluation  

E-Print Network (OSTI)

1 Modeling Heavy-tails in Traffic Sources for Network Performance Evaluation Vaidyanathan Ramaswami, Kaustubh Jain, Rittwik Jana, Vaneet Aggarwal Abstract--Heavy tails in work loads (file sizes, flow lengths heavy tailed random variables. The fits obtained are validated using separate training and test data

Greenberg, Albert

262

11.482J / 1.285J / ESD.193J Regional Socioeconomic Impact Analysis and Modeling, Fall 2004  

E-Print Network (OSTI)

Reviews regional economic theories and models and provides students with experience in using alternative economic impact assessment models on microcomputers. Problem sets are oriented around infrastructure, housing, energy, ...

Polenske, Karen R.

263

11.482J / 1.285J / ESD.193J Regional Socioeconomic Impact Analysis and Modeling, Fall 2005  

E-Print Network (OSTI)

Reviews regional economic theories and models and provides students with experience in using alternative economic impact assessment models on microcomputers. Problem sets are oriented around infrastructure, housing, energy, ...

Polenske, Karen R.

264

Coupling of Integrated Biosphere Simulator to Regional Climate Model version 3  

E-Print Network (OSTI)

Presented in this thesis is a description of the coupling of Integrated Biosphere Simulator (IBIS) to Regional Climate Model version 3 (RegCM3), and an assessment of the coupled model (RegCM3-IBIS). RegCM3 is a 3-dimensional, ...

Winter, Jonathan (Jonathan Mark)

2006-01-01T23:59:59.000Z

265

Introducing an Irrigation Scheme to a Regional Climate Model: A Case Study over West Africa  

Science Conference Proceedings (OSTI)

This article presents a new irrigation scheme and biome to the dynamic vegetation model, Integrated Biosphere Simulator (IBIS), coupled to Regional ClimateModel version 3 (RegCM3-IBIS). The new land cover allows for only the plant functional type, ...

Marc P. Marcella; Elfatih A. B. Eltahir

266

Modeling the Spatial Distribution of Snow Cover in the Dudhkoshi Region of the Nepal Himalayas  

Science Conference Proceedings (OSTI)

In this study, a distributed biosphere hydrological model with three-layer energy-balance snow physics [an improved version of the Water and Energy Budget–based Distributed Hydrological Model (WEB-DHM-S)] is applied to the Dudhkoshi region of the ...

Maheswor Shrestha; Lei Wang; Toshio Koike; Yongkang Xue; Yukiko Hirabayashi

2012-02-01T23:59:59.000Z

267

Regional load-curve models: QUERI's model long-run forecasts and sensitivity analysis. Volume 4. Final report. [Hourly demand in 32 US regions  

SciTech Connect

This report presents detailed forecasts of the hourly demand for electricity in 32 regions of the US through the year 2000. The forecasts are generated by a load curve model estimated by QUERI and described in Volume II of this report. Two primary sets of input assumptions for this model are utilized: one based on DRI's macro, regional and sectoral models is called the Baseline Scenario while the other, which is a projection of historical trends, is the Extrapolation Scenario. Under both assumptions, the growth rates of electricity are forecast to slow from historical levels. Load factors are generally projected to continue to decline; most regions are forecast to remain Summer peaking but this is rather sensitive to the choice of scenario. By considering other scenarios which are small perturbations of the Baseline assumptions, elasticities of average, peak and hourly loads are calculated. Different weather assumptions are also examined for the sensitivity of the load shapes to changes in the weather.

Engle, R.F.; Granger, C.W.J.; Ramanathan, R.

1981-09-01T23:59:59.000Z

268

Back-calculating emission rates for ammonia and particulate matter from area sources using dispersion modeling  

E-Print Network (OSTI)

Engineering directly impacts current and future regulatory policy decisions. The foundation of air pollution control and air pollution dispersion modeling lies in the math, chemistry, and physics of the environment. Therefore, regulatory decision making must rely upon sound science and engineering as the core of appropriate policy making (objective analysis in lieu of subjective opinion). This research evaluated particulate matter and ammonia concentration data as well as two modeling methods, a backward Lagrangian stochastic model and a Gaussian plume dispersion model. This analysis assessed the uncertainty surrounding each sampling procedure in order to gain a better understanding of the uncertainty in the final emission rate calculation (a basis for federal regulation), and it assessed the differences between emission rates generated using two different dispersion models. First, this research evaluated the uncertainty encompassing the gravimetric sampling of particulate matter and the passive ammonia sampling technique at an animal feeding operation. Future research will be to further determine the wind velocity profile as well as determining the vertical temperature gradient during the modeling time period. This information will help quantify the uncertainty of the meteorological model inputs into the dispersion model, which will aid in understanding the propagated uncertainty in the dispersion modeling outputs. Next, an evaluation of the emission rates generated by both the Industrial Source Complex (Gaussian) model and the WindTrax (backward-Lagrangian stochastic) model revealed that the calculated emission concentrations from each model using the average emission rate generated by the model are extremely close in value. However, the average emission rates calculated by the models vary by a factor of 10. This is extremely troubling. In conclusion, current and future sources are regulated based on emission rate data from previous time periods. Emission factors are published for regulation of various sources, and these emission factors are derived based upon back-calculated model emission rates and site management practices. Thus, this factor of 10 ratio in the emission rates could prove troubling in terms of regulation if the model that the emission rate is back-calculated from is not used as the model to predict a future downwind pollutant concentration.

Price, Jacqueline Elaine

2004-08-01T23:59:59.000Z

269

Constraints on coronal turbulence models from source sizes of noise storms at 327 MHz  

E-Print Network (OSTI)

We seek to reconcile observations of small source sizes in the solar corona at 327 MHz with predictions of scattering models that incorporate refractive index effects, inner scale effects and a spherically diverging wavefront. We use an empirical prescription for the turbulence amplitude $C_{N}^{2}(R)$ based on VLBI observations by Spangler and coworkers of compact radio sources against the solar wind for heliocentric distances $R \\approx$ 10--50 $R_{\\odot}$. We use the Coles & Harmon model for the inner scale $l_{i}(R)$, that is presumed to arise from cyclotron damping. In view of the prevalent uncertainty in the power law index that characterizes solar wind turbulence at various heliocentric distances, we retain this index as a free parameter. We find that the inclusion of spherical divergence effects suppresses the predicted source size substantially. We also find that inner scale effects significantly reduce the predicted source size. An important general finding for solar sources is that the calculat...

Subramanian, Prasad

2010-01-01T23:59:59.000Z

270

Coupling Aerosol-Cloud-Radiative Processes in the WRF-Chem Model: Investigating the Radiative Impact of Elevated Point Sources  

Science Conference Proceedings (OSTI)

The local and regional influence of elevated point sources on summertime aerosol forcing and cloud-aerosol interactions in northeastern North America was investigated using the WRF-Chem community model. The direct effects of aerosols on incoming solar radiation were simulated using existing modules to relate aerosol sizes and chemical composition to aerosol optical properties. Indirect effects were simulated by adding a prognostic treatment of cloud droplet number and adding modules that activate aerosol particles to form cloud droplets, simulate aqueous phase chemistry, and tie a two-moment treatment of cloud water (cloud water mass and cloud droplet number) to an existing radiation scheme. Fully interactive feedbacks thus were created within the modified model, with aerosols affecting cloud droplet number and cloud radiative properties, and clouds altering aerosol size and composition via aqueous processes, wet scavenging, and gas-phase-related photolytic processes. Comparisons of a baseline simulation with observations show that the model captured the general temporal cycle of aerosol optical depths (AODs) and produced clouds of comparable thickness to observations at approximately the proper times and places. The model slightly overpredicted SO2 mixing ratios and PM2.5 mass, but reproduced the range of observed SO2 to sulfate aerosol ratios, suggesting that atmospheric oxidation processes leading to aerosol sulfate formation are captured in the model. The baseline simulation was compared to a sensitivity simulation in which all emissions at model levels above the surface layer were set to zero, thus removing stack emissions. Instantaneous, site-specific differences for aerosol and cloud related properties between the two simulations could be quite large, as removing above-surface emission sources influenced when and where clouds formed within the modeling domain. When summed spatially over the finest resolution model domain (the extent of which corresponds to the typical size of a single GCM grid cell) and temporally over a three day analysis period, total rainfall in the sensitivity simulation increased by 31% over that in the baseline simulation. Fewer optically thin clouds, arbitrarily defined as a cloud exhibiting an optical depth less than 1, formed in the sensitivity simulation. Domain-averaged AODs dropped from 0.46 in the baseline simulation to 0.38 in the sensitivity simulation. The overall net effect of additional aerosols attributable to primary particulates and aerosol precursors from point source emissions above the surface was a domain-averaged reduction of 5 W m-2 in mean daytime downwelling shortwave radiation.

Chapman, Elaine G.; Gustafson, William I.; Easter, Richard C.; Barnard, James C.; Ghan, Steven J.; Pekour, Mikhail S.; Fast, Jerome D.

2009-02-01T23:59:59.000Z

271

Detecting Source Regions of Wave Activities in the Tropical Atmosphere by Applying Beamforming to Interpolated Data Grids  

Science Conference Proceedings (OSTI)

Wave activities are primary sources of weather disturbances and cyclones in the tropical atmosphere. One such activity is the intraseasonal variations in wind, convection, and precipitation in the tropical Indian and western tropical Pacific ...

Qi Hu; Zhaoning Liang; Michael W. Hoffman

2009-02-01T23:59:59.000Z

272

In situ measurements of speciated atmospheric mercury and the identification of source regions in the Mexico City Metropolitan Area  

E-Print Network (OSTI)

In order to expand the currently limited understanding of atmospheric mercury source-receptor relationships in the Mexico City Metropolitan Area, real time measurements of atmospheric mercury were made at a downtown urban ...

Rutter, A. P.

273

Modeling the Market Potential of Hydrogen from Wind and Competing Sources: Preprint  

DOE Green Energy (OSTI)

Developed from the Wind Deployment Systems (WinDS) model, the Hydrogen Deployment Systems (HyDS) model is a computer model of U.S. market expansion of hydrogen production from wind and other sources over the next 50 years. The WinDS model was developed in 2003 to model the expansion of generation and transmission capacity in the U.S. electric sector spanning the next 50 years. It minimizes system-wide costs of meeting loads, reserve requirements, and emission constraints by building and operating new generators and transmission in 26 two-year periods from 2000 to 2050. While it includes all major types of conventional generators, the WinDS model focuses on addressing the market issues of greatest significance to wind-specifically issues of electricity transmission and intermittency.

Short, W.; Blair, N.; Heimiller, D.

2005-05-01T23:59:59.000Z

274

Investigation of the Summer Climate of the Contiguous United States and Mexico Using the Regional Atmospheric Modeling System (RAMS). Part I: Model Climatology (1950–2002)  

Science Conference Proceedings (OSTI)

Fifty-three years of the NCEP–NCAR Reanalysis I are dynamically downscaled using the Regional Atmospheric Modeling System (RAMS) to generate a regional climate model (RCM) climatology of the contiguous United States and Mexico. Data from the RAMS ...

Christopher L. Castro; Roger A. Pielke Sr.; Jimmy O. Adegoke

2007-08-01T23:59:59.000Z

275

A diffusion theory model for optimization calculations of cold neutron sources  

DOE Green Energy (OSTI)

This summary describes a simple two-group diffusion model of an infinite slab, liquid deuterium (LD/sub 2/) cold source. The simplicity of the model permits us to obtain an analytical solution from which we can deduce the reason for the optimum thickness based solely on diffusion type phenomena. Also, a second more sophisticated model is described, and the results compared to a deterministic transport calculation. The good (particularly qualitative) agreement between the results suggests that diffusion theory methods can be used in parametric and optimization studies in order to avoid the generally more expensive transport calculations. 5 refs., 1 fig.

Azmy, Y.Y.

1987-01-01T23:59:59.000Z

276

Imaging magnetic sources in the presence of superconducting surfaces : model&experiment  

DOE Green Energy (OSTI)

The forward physics model describing the effect of a superconducting surface on the magnetic field distribution resulting from specific magnetic sources has numerous applications ranging from basic physics experiments to large superconducting magnets used in energy storage and magnetic resonance imaging. In this paper, we describe the novel application of a superconducting imaging surface (SIS) to enhance the performance of systems designed to directly observe and localize human brain function. Magnetoencephalography (MEG) measures the weak magnetic fields emanating from the brain as a direct consequence of the neuronal currents resulting from brain function[1]. The extraordinarily weak magnetic fields are measured by an array of SQUID (Superconducting QUantum Interference Device) sensors. The position and vector characteristics of these neuronal sources can be estimated from the inverse solution of the field distribution at the surface of the head. In addition, MEG temporal resolution is unsurpassed by any other method currently used for brain imaging. Although MEG source reconstruction is limited by solutions of the electromagnetic inverse problem, constraints used for source localization produce reliable results. A novel MEG system incorporating a SIS has been designed and built at Los Alamos with the goal of dramatically improving source localization accuracy while mitigating limitations of current systems (e.g. low signal-to-noise, cost, bulk). We incorporate shielding and source field measurement into an integrated design and combine the latest SQUID and data acquisition technology. The Los Alamos MEG system is based on the principal that fields from nearby sources measured by a SQUID sensor array while the SIS simultaneously shields the sensor array from distant noise fields. In general, Meissner currents flow in the surface of superconductors, preventing any significant penetration of magnetic fields. A hemispherical SIS with a brim, or helmet, surrounds the SQUID sensor array largely sheilding the SQUID sensors from sources outside the helmet. We present the general derivation of the forward model used to describe the effect of a SIS on source fields. Experimental data for the SIS-MEG system are compared with computed field distributions for a comprehensive set of sources.

Matlachov, A. N. (Andrei N.); Espy, M. A. (Michelle A.); Volegov, P. (Petr); Flynn, E. R. (Edward. R.); Maharajh, K. (Keeran); Kraus, Robert H., Jr.

2001-01-01T23:59:59.000Z

277

Examining the Effects of Variability in Average Link Speeds on Estimated Mobile Source Emissions and Air Quality  

E-Print Network (OSTI)

Fine-Grained Regional Emissions Estimation." TransportationA New Mobile Source Emission Inventory Model." AtmosphericData for Mobile Source Emissions Estimates. Transportation

Sogutlugil, Mihriban

2005-01-01T23:59:59.000Z

278

Research Needs and Directions of Regional Climate Modeling Using WRF and CCSM  

SciTech Connect

Climate varies across a wide range of temporal and spatial scales. Yet, climate modeling has long been approached using global models that can resolve only the broader scales of atmospheric processes and their interactions with land, ocean, and sea ice. Clearly, large-scale climate determines the environment for mesoscale and microscale processes that govern the weather and local climate, but, likewise, processes that occur at the regional scale may have significant impacts on the large scale circulation. Resolving such scale interactions will lead to much improved understanding of how climate both influences, and is influenced by, human activities. Since October 2003, the National Center for Atmospheric Research (NCAR) has supported an effort through the Opportunity Fund to develop regional climate modeling capability using the Weather Research and Forecasting (WRF) model (http://www.wrf-model.org/index.php) and the Community Climate System Model (CCSM) (http://www.ccsm.ucar.edu/models), with participations by members of both the Mesoscale and Microscale Meteorology and Climate and Global Dynamics Divisions. The goal is to develop a next generation community Regional Climate Model (RCM) that can address both downscaling and upscaling issues in climate modeling. Downscaling is the process of deriving regional climate information based on large-scale climate conditions. Both dynamical and statistical downscaling methods have been used to produce regional climate change scenarios; however, their resolution and physical fidelity are considered inadequate. Hence, the global change community has expressed a strong demand for improved regional climate information to explore the implications of adaptation and mitigation and assess climate change impacts (http://www.climatescience.gov/events/workshop2002/). Upscaling encapsulates the aggregate effects of small-scale physical and dynamical processes on the large-scale climate. One form of upscaling is the use of physical parameterizations such as that for deep convection. These are also considered to be inadequate, as much of the uncertainty in model sensitivity to greenhouse gases is now known to be associated with cloud parameterizations. Another form of upscaling is to explicitly include the effects of regional processes on the large-scale environment, both locally and remotely. Since their inception in the late 1980s, RCMs have been used predominantly to address downscaling issues through one-way coupling with global analyses or climate models. As part of the NCAR project, WRF has been adapted for simulating regional climate. Seasonal simulations over the U.S. have shown realistic features including the low-level jet and diurnal cycle of rainfall in the Central U.S. (Leung et al. 2005), and orographic precipitation in the western U.S. (Done et al. 2005). A WRF Regional Climate Modeling Working Group has been established to coordinate RCM research activities. To help define the next steps, a workshop on “Research Needs and Directions of Regional Climate Modeling Using WRF and CCSM” was organized to engage the regional and global climate modeling communities to: (1) define research needs for the development of a next generation community RCM based on WRF and CCSM; (2) define upscaling and downscaling research that can be addressed by RCMs; and (3) develop a plan of actions that would meet the research needs. This article summarizes the research issues and recommendations discussed at the workshop. There is no implied order in the research priorities listed below. Workshop agenda and presentations can be found at http://box.mmm.ucar.edu/events/rcm05/.

Leung, Lai R.; Kuo, Y.-H.; Tribbia, J.

2006-12-01T23:59:59.000Z

279

Regional groundwater flow and tritium transport modeling and risk assessment of the underground test area, Nevada Test Site, Nevada  

Science Conference Proceedings (OSTI)

The groundwater flow system of the Nevada Test Site and surrounding region was evaluated to estimate the highest potential current and near-term risk to the public and the environment from groundwater contamination downgradient of the underground nuclear testing areas. The highest, or greatest, potential risk is estimated by assuming that several unusually rapid transport pathways as well as public and environmental exposures all occur simultaneously. These conservative assumptions may cause risks to be significantly overestimated. However, such a deliberate, conservative approach ensures that public health and environmental risks are not underestimated and allows prioritization of future work to minimize potential risks. Historical underground nuclear testing activities, particularly detonations near or below the water table, have contaminated groundwater near testing locations with radioactive and nonradioactive constituents. Tritium was selected as the contaminant of primary concern for this phase of the project because it is abundant, highly mobile, and represents the most significant contributor to the potential radiation dose to humans for the short term. It was also assumed that the predicted risk to human health and the environment from tritium exposure would reasonably represent the risk from other, less mobile radionuclides within the same time frame. Other contaminants will be investigated at a later date. Existing and newly collected hydrogeologic data were compiled for a large area of southern Nevada and California, encompassing the Nevada Test Site regional groundwater flow system. These data were used to develop numerical groundwater flow and tritium transport models for use in the prediction of tritium concentrations at hypothetical human and ecological receptor locations for a 200-year time frame. A numerical, steady-state regional groundwater flow model was developed to serve as the basis for the prediction of the movement of tritium from the underground testing areas on a regional scale. The groundwater flow model was used in conjunction with a particle-tracking code to define the pathlines followed by groundwater particles originating from 415 points associated with 253 nuclear test locations. Three of the most rapid pathlines were selected for transport simulations. These pathlines are associated with three nuclear test locations, each representing one of the three largest testing areas. These testing locations are: BOURBON on Yucca Flat, HOUSTON on Central Pahute Mesa, and TYBO on Western Pahute Mesa. One-dimensional stochastic tritium transport simulations were performed for the three pathlines using the Monte Carlo method with Latin hypercube sampling. For the BOURBON and TYBO pathlines, sources of tritium from other tests located along the same pathline were included in the simulations. Sensitivity analyses were also performed on the transport model to evaluate the uncertainties associated with the geologic model, the rates of groundwater flow, the tritium source, and the transport parameters. Tritium concentration predictions were found to be mostly sensitive to the regional geology in controlling the horizontal and vertical position of transport pathways. The simulated concentrations are also sensitive to matrix diffusion, an important mechanism governing the migration of tritium in fractured carbonate and volcanic rocks. Source term concentration uncertainty is most important near the test locations and decreases in importance as the travel distance increases. The uncertainty on groundwater flow rates is as important as that on matrix diffusion at downgradient locations. The risk assessment was performed to provide conservative and bounding estimates of the potential risks to human health and the environment from tritium in groundwater. Risk models were designed by coupling scenario-specific tritium intake with tritium dose models and cancer and genetic risk estimates using the Monte Carlo method. Estimated radiation doses received by individuals from chronic exposure to tritium, and the corre

None

1997-10-01T23:59:59.000Z

280

Rainfall Anomalies in the Source Region of the Nile and Their Connection with the Indian Summer Monsoon  

Science Conference Proceedings (OSTI)

In light of the droughts and subsequent food crises that have plagued the Ethiopia–Sudan region in the course of its history, and especially during the last 3 decades, the author examines both the interannual and intraseasonal variabilities of ...

Pierre Camberlin

1997-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Modeling-Computer Simulations At Northern Basin & Range Region (Blackwell,  

Open Energy Info (EERE)

Northern Basin & Northern Basin & Range Region (Blackwell, Et Al., 2003) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Developed natural state mass and energy transport fluid flow models of generic Basin and Range systems based on Dixie Valley data that help to understand the nature of large scale constraints on the location and characteristics of the geothermal systems References D. D. Blackwell, K. W. Wisian, M. C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis And Structure Of Basin And Range Systems, Especially Dixie Valley Geothermal Field, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Northern_Basin_%26_Range_Region_(Blackwell,_Et_Al.,_2003)&oldid=401422

282

Source characterization and modeling development for monoenergetic-proton radiography experiments on OMEGA  

SciTech Connect

A monoenergetic proton source has been characterized and a modeling tool developed for proton radiography experiments at the OMEGA [T. R. Boehly et al., Opt. Comm. 133, 495 (1997)] laser facility. Multiple diagnostics were fielded to measure global isotropy levels in proton fluence and images of the proton source itself provided information on local uniformity relevant to proton radiography experiments. Global fluence uniformity was assessed by multiple yield diagnostics and deviations were calculated to be {approx}16% and {approx}26% of the mean for DD and D{sup 3}He fusion protons, respectively. From individual fluence images, it was found that the angular frequencies of Greater-Than-Or-Equivalent-To 50 rad{sup -1} contributed less than a few percent to local nonuniformity levels. A model was constructed using the Geant4 [S. Agostinelli et al., Nuc. Inst. Meth. A 506, 250 (2003)] framework to simulate proton radiography experiments. The simulation implements realistic source parameters and various target geometries. The model was benchmarked with the radiographs of cold-matter targets to within experimental accuracy. To validate the use of this code, the cold-matter approximation for the scattering of fusion protons in plasma is discussed using a typical laser-foil experiment as an example case. It is shown that an analytic cold-matter approximation is accurate to within Less-Than-Or-Equivalent-To 10% of the analytic plasma model in the example scenario.

Manuel, M. J.-E.; Zylstra, A. B.; Rinderknecht, H. G.; Casey, D. T.; Rosenberg, M. J.; Sinenian, N.; Li, C. K.; Frenje, J. A.; Seguin, F. H.; Petrasso, R. D. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 (United States)

2012-06-15T23:59:59.000Z

283

Magnetic Flux of EUV Arcade and Dimming Regions as a Relevant Parameter for Early Diagnostics of Solar Eruptions - Sources of Non-Recurrent Geomagnetic Storms and Forbush Decreases  

E-Print Network (OSTI)

This study aims at the early diagnostics of geoeffectiveness of coronal mass ejections (CMEs) from quantitative parameters of the accompanying EUV dimming and arcade events. We study events of the 23th solar cycle, in which major non-recurrent geomagnetic storms (GMS) with Dst solar sources in the central part of the disk. Using the SOHO/EIT 195 A images and MDI magnetograms, we select significant dimming and arcade areas and calculate summarized unsigned magnetic fluxes in these regions at the photospheric level. The high relevance of this eruption parameter is displayed by its pronounced correlation with the Forbush decrease (FD) magnitude, which, unlike GMSs, does not depend on the sign of the Bz component but is determined by global characteristics of ICMEs. Correlations with the same magnetic flux in the solar source region are found for the GMS intensity (at the first step, without taking into account factors determining the Bz component near t...

Chertok, I M; Belov, A V; Abunin, A A

2012-01-01T23:59:59.000Z

284

The groundwater modeling tool for GRASS (GMTG): Open source groundwater flow modeling  

Science Conference Proceedings (OSTI)

Geographic Information Systems (GIS) are used to store, manipulate and visualize both spatial and non-spatial data. Because of their data manipulating capabilities, GIS have been linked to different simulation models in different research areas and are ... Keywords: GRASS, Geographic Information Systems, Groundwater modeling, MODFLOW

J. J. Carrera-Hernández; S. J. Gaskin

2006-04-01T23:59:59.000Z

285

Ion source  

DOE Patents (OSTI)

A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species.

Leung, Ka-Ngo (Hercules, CA); Ehlers, Kenneth W. (Alamo, CA)

1984-01-01T23:59:59.000Z

286

On the Application of a Lagrangian Particle–Puff Model to Elevated Sources in Surface Layers with Neutral Stability  

Science Conference Proceedings (OSTI)

A Lagrangian particle–puff model is presented for predicting the statistical properties of tracers dispersing from elevated sources into surface layers with neutral stability. The model is based upon F. A. Gifford’s meandering-plume concept and ...

Andrew Michael Reynolds

2000-07-01T23:59:59.000Z

287

Incorporating Stakeholder Decision Support Needs into an Integrated Regional Earth System Model  

Science Conference Proceedings (OSTI)

A new modeling effort exploring the opportunities, constraints, and interactions between mitigation and adaptation at regional scale is utilizing stakeholder engagement in an innovative approach to guide model development and demonstration, including uncertainty characterization, to effectively inform regional decision making. This project, the integrated Regional Earth System Model (iRESM), employs structured stakeholder interactions and literature reviews to identify the most relevant adaptation and mitigation alternatives and decision criteria for each regional application of the framework. The information is used to identify important model capabilities and to provide a focus for numerical experiments. This paper presents the stakeholder research results from the first iRESM pilot region. The pilot region includes the Great Lakes Basin in the Midwest portion of the United States as well as other contiguous states. This geographic area (14 states in total) permits cohesive modeling of hydrologic systems while also providing gradients in climate, demography, land cover/land use, and energy supply and demand. The results from the stakeholder research indicate that iRESM should prioritize addressing adaptation alternatives in the water resources, urban infrastructure, and agriculture sectors, such as water conservation, expanded water quality monitoring, altered reservoir releases, lowered water intakes, urban infrastructure upgrades, increased electric power reserves in urban areas, and land use management/crop selection changes. Regarding mitigation alternatives, the stakeholder research shows a need for iRESM to focus on policies affecting the penetration of renewable energy technologies, and the costs and effectiveness of energy efficiency, bioenergy production, wind energy, and carbon capture and sequestration.

Rice, Jennie S.; Moss, Richard H.; Runci, Paul J.; Anderson, K. L.; Malone, Elizabeth L.

2012-03-21T23:59:59.000Z

288

Sources of CP violation from E{sub 6} inspired heterotic string model  

Science Conference Proceedings (OSTI)

Sources of the weak CP violation from the SU{sub L}(3)x SU{sub R}(3)x SU{sub c}(3) subgroup of the E{sub 6} inspired heterotic string model are discussed. It is shown that the number of the Cabibo-Kobayachi-Maskawa like matrices depends on the spontaneous breakdown of the E{sub 6} gauge symmetry and/or supersymmetry.

Boussahel, M.; Mebarki, N. [Departement de physique Faculte des sciences Universite de M'sila 28000 (Algeria); Laboratoire de Physique Mathematique et Subatomique Mentouri University, Constantine (Algeria)

2012-06-27T23:59:59.000Z

289

Regional Maps  

Annual Energy Outlook 2012 (EIA)

United States Census Divisions Figure 2.Electricity Market Module (EMM)Regions Source: Energy Information Administration, Office of Integrated Analysis and Forecasting Figure...

290

NONLINEAR FORCE-FREE FIELD MODELING OF A SOLAR ACTIVE REGION USING SDO/HMI AND SOLIS/VSM DATA  

Science Conference Proceedings (OSTI)

We use SDO/HMI and SOLIS/VSM photospheric magnetic field measurements to model the force-free coronal field above a solar active region, assuming magnetic forces dominate. We take measurement uncertainties caused by, e.g., noise and the particular inversion technique, into account. After searching for the optimum modeling parameters for the particular data sets, we compare the resulting nonlinear force-free model fields. We show the degree of agreement of the coronal field reconstructions from the different data sources by comparing the relative free energy content, the vertical distribution of the magnetic pressure, and the vertically integrated current density. Though the longitudinal and transverse magnetic flux measured by the VSM and HMI is clearly different, we find considerable similarities in the modeled fields. This indicates the robustness of the algorithm we use to calculate the nonlinear force-free fields against differences and deficiencies of the photospheric vector maps used as an input. We also depict how much the absolute values of the total force-free, virial, and the free magnetic energy differ and how the orientation of the longitudinal and transverse components of the HMI- and VSM-based model volumes compare to each other.

Thalmann, J. K.; Wiegelmann, T. [Max-Plank-Institut fuer Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau (Germany); Pietarila, A. [National Solar Observatory, 950 N. Cherry Avenue, Tucson, AZ 85719 (United States); Sun, X., E-mail: thalmann@mps.mpg.de [W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305 (United States)

2012-08-15T23:59:59.000Z

291

Ocean forecasting in terrain-following coordinates: Formulation and skill assessment of the Regional Ocean Modeling System  

Science Conference Proceedings (OSTI)

Systematic improvements in algorithmic design of regional ocean circulation models have led to significant enhancement in simulation ability across a wide range of space/time scales and marine system types. As an example, we briefly review the Regional ... Keywords: Biogeochemical cycles, Incompressible Navier-Stokes equations, Regional ocean prediction, Sea ice modeling, Split-explicit time stepping

D. B. Haidvogel; H. Arango; W. P. Budgell; B. D. Cornuelle; E. Curchitser; E. Di Lorenzo; K. Fennel; W. R. Geyer; A. J. Hermann; L. Lanerolle; J. Levin; J. C. McWilliams; A. J. Miller; A. M. Moore; T. M. Powell; A. F. Shchepetkin; C. R. Sherwood; R. P. Signell; J. C. Warner; J. Wilkin

2008-03-01T23:59:59.000Z

292

Simulation of the Recent Multidecadal Increase of Atlantic Hurricane Activity Using an 18-km-Grid Regional Model  

Science Conference Proceedings (OSTI)

In this study, a new modeling framework for simulating Atlantic hurricane activity is introduced. The model is an 18-km-grid nonhydrostatic regional model, run over observed specified SSTs and nudged toward observed time-varying large-scale ...

Thomas R. Knutson; Joseph J. Sirutis; Stephen T. Garner; Isaac M. Held; Robert E. Tuleya

2007-10-01T23:59:59.000Z

293

Simulation of Regional Climate Using a Limited Area Model Nested in a General Circulation Model  

Science Conference Proceedings (OSTI)

A Limited Area Model (LAM) is nested in a General Circulation Model (GCM) to simulate the January climate over the western United States. In the nesting procedure, the GCM output is used to provide the initial and lateral atmospheric boundary ...

Filippo Giorgi

1990-09-01T23:59:59.000Z

294

Wetland model in an earth systems modeling framework for regional environmental policy analysis  

E-Print Network (OSTI)

The objective of this research is to investigate incorporating a wetland component into a land energy and water fluxes model, the Community Land Model (CLM). CLM is the land fluxes component of the Integrated Global Systems ...

Awadalla, Sirein Salah

2011-01-01T23:59:59.000Z

295

Evaluating a biomass resource: The TVA region-wide biomass resource assessment model  

DOE Green Energy (OSTI)

Wood is an alterative fuel for electric power generation at coal-fired plants in the Tennessee Valley Authority (TVA) region. Short rotation wood energy crops (SRWC) could provide a source of this woody biomass. However, the economic and supply structures of SRWC markets have not been established. Establishing the likely price and supply of SRWC biomass in a region is a complex task because biomass is not an established commodity as are oil, natural gas and coal. In this study we project the cost and supply of short-rotation woody biomass for the TVA region -- a 276 county area that includes all of Tennessee and portions of 10 contiguous states in the southeastern United States. Projected prices and quantities of SRWC are assumed to be a function of the amount and quality of crop and pasture land available in a region. expected SRWC yields and production costs on differing soils and land types, and the profit that could be obtained from current conventional crop production on these same lands. Results include the supply curve of SRWC biomass that is projected to be available from the entire region, the amount and location of crop and pasture land that would be used, and the conventional agricultural crops that would be displaced as a function of SRWC production. Finally, we show the results of sensitivity analysis on the projected cost and supply of SRWC biomass. In particular, we examine the separate impacts of varying SRWC production yields.

Downing, M.; Graham, R.L.

1993-12-31T23:59:59.000Z

296

Regional Modelling of the Southern African Geomagnetic Field using Harmonic Splines  

E-Print Network (OSTI)

Over the southern African region the geomagnetic field is weak and changes rapidly. For this area series of geomagnetic field measurements exist since the 1950s. We take advantage of the existing repeat station surveys and observatory annual means, and clean these data sets by eliminating jumps and minimising external field contributions in the original time series. This unique data set allows us to obtain a detailed view of the geomagnetic field behaviour in space and time by computing a regional model. For this, we use a system of representation similar to harmonic splines. Initially, the technique is systematically tested on synthetic data. After systematically testing the method on synthetic data, we derive a model for 1961 to 2001 that gives a detailed view of the fast changes of the geomagnetic field in this region.

Geese, Anne; Lesur, Vincent; Mandea, Mioara

2010-01-01T23:59:59.000Z

297

Investigation of Aapprox100 mass region up to exotic with interacting boson model  

Science Conference Proceedings (OSTI)

Even-even nuclei in the Aapprox100 mass region are investigated within the framework of the interacting boson model-1 (IBM-1). The parametrization established on the basis of known elements is then used to predict properties of the unknown. This paper includes the predicted energy spectra and the potential energy surface obtained from the IBM-1 hamiltonian in the classical limit.

Boeyuekata, M. [Physics Department, Faculty of Science and Arts, University of Kirikkale, 71100 Kirikkale (Turkey); Physics Department 'Galileo Galilei', Padova University, Via Marzolo 8, I-35131 Padova (Italy); Uluer, I. [Physics Department, Faculty of Science and Arts, University of Kirikkale, 71100 Kirikkale (Turkey)

2010-04-26T23:59:59.000Z

298

The Value of Coarse-Scale Soil Moisture Observations for Regional Surface Energy Balance Modeling  

Science Conference Proceedings (OSTI)

Using high-resolution (1 km) hydrologic modeling of the 575 000-km2 Red–Arkansas River basin, the impact of spatially aggregating soil moisture imagery up to the footprint scale (32–64 km) of spaceborne microwave radiometers on regional-scale ...

Wade T. Crow; Eric F. Wood

2002-08-01T23:59:59.000Z

299

A Preliminary Synthesis of Modeled Climate Change Impacts on U.S. Regional Ozone Concentrations  

Science Conference Proceedings (OSTI)

This paper provides a synthesis of results that have emerged from recent modeling studies of the potential sensitivity of U.S. regional ozone (O3) concentrations to global climate change (ca. 2050). This research has been carried out under the ...

C. P. Weaver; E. Cooter; R. Gilliam; A. Gilliland; A. Grambsch; D. Grano; B. Hemming; S. W. Hunt; C. Nolte; D. A. Winner; X-Z. Liang; J. Zhu; M. Caughey; K. Kunkel; J-T. Lin; Z. Tao; A. Williams; D. J. Wuebbles; P. J. Adams; J. P. Dawson; P. Amar; S. He; J. Avise; J. Chen; R. C. Cohen; A. H. Goldstein; R. A. Harley; A. L. Steiner; S. Tonse; A. Guenther; J-F. Lamarque; C. Wiedinmyer; W. I. Gustafson; L. R. Leung; C. Hogrefe; H-C. Huang; D. J. Jacob; L. J. Mickley; S. Wu; P. L. Kinney; B. Lamb; N. K. Larkin; D. McKenzie; K-J. Liao; K. Manomaiphiboon; A. G. Russell; E. Tagaris; B. H. Lynn; C. Mass; E. Salathé; S. M. O'neill; S. N. Pandis; P. N. Racherla; C. Rosenzweig; J-H. Woo

2009-12-01T23:59:59.000Z

300

A Multiyear Regional Climate Hindcast for the Western United States Using the Mesoscale Atmospheric Simulation Model  

Science Conference Proceedings (OSTI)

In preparation for studying the effects of increased CO2 on the hydrologic cycle in the western United States, an 8-yr hindcast was performed using a regional climate model (RCM) driven by the large-scale forcing from the NCEP–NCAR reanalysis. ...

Jinwon Kim; Jung-Eun Lee

2003-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Quantification of the Lateral Boundary Forcing of a Regional Climate Model Using an Aging Tracer  

Science Conference Proceedings (OSTI)

The present work introduces a new and useful tool to quantify the lateral boundary forcing of a regional climate model (RCM). This tool, an aging tracer, computes the time the air parcels spend inside the limited-area domain of an RCM. The aging ...

Philippe Lucas-Picher; Daniel Caya; Sébastien Biner; René Laprise

2008-12-01T23:59:59.000Z

302

Changes in the European Precipitation Climatologies as Derived by an Ensemble of Regional Models  

Science Conference Proceedings (OSTI)

This paper analyzes the changes in the precipitation climatologies of Europe for the periods 1960–90 and 2070–2100 using a heterogeneous set of regional climate models (RCMs). The authors used the Climatic Research Unit (CRU) database to define a ...

Francisco J. Tapiador; Enrique Sánchez

2008-06-01T23:59:59.000Z

303

Simulation of the Arid Climate of the Southern Great Basin Using a Regional Climate Model  

Science Conference Proceedings (OSTI)

As part of the development effort of a regional climate model (RCM)for the southern Great Basin, this paper present savalidation analysis of the climatology generated by a high-resolution RCM driven by observations. The RCM is aversion of the ...

Filippo Giorgi; Gary T. Bates; Steven J. Nieman

1992-11-01T23:59:59.000Z

304

Diagnosing Land–Atmosphere Interaction from a Regional Climate Model Simulation over West Africa  

Science Conference Proceedings (OSTI)

Land–atmosphere interaction at climatological time scales in a large area that includes the West African Sahel has been explicitly explored in a regional climate model (RegCM) simulation using a range of diagnostics. First, areas and seasons of ...

Bart J. J. M. van den Hurk; Erik van Meijgaard

2010-04-01T23:59:59.000Z

305

Future climate in the Tibetan Plateau from a statistical regional climate model  

Science Conference Proceedings (OSTI)

We use a statistical regional climate model (STAR) to project the Tibetan Plateau (TP) climate for the period 2015-2050. Reanalysis datasets covering 1958-2001 are used as a substitute of observations and resampled by STAR to optimally fit ...

Xiuhua Zhu; Weiqiang Wang; Klaus Fraedrich

306

Assessment of Value Added for Surface Marine Wind Speed Obtained from Two Regional Climate Models  

Science Conference Proceedings (OSTI)

Hindcasts with reanalysis-driven regional climate models (RCMs) are a common tool to assess weather statistics (i.e., climate) and recent changes and trends. The capability of different state-of-the-art RCMs (with and without spectral nudging ...

Jörg Winterfeldt; Ralf Weisse

2009-09-01T23:59:59.000Z

307

An Investigation of Summer Precipitation Simulated by the Canadian Regional Climate Model  

Science Conference Proceedings (OSTI)

In the present paper, a 5-yr baseline integration for the period 1987–91 was carried out over a Pan-Canadian domain to validate the performance of the third-generation Canadian Regional Climate Model (CRCM). The CRCM simulated the large-scale ...

Yanjun Jiao; Daniel Caya

2006-03-01T23:59:59.000Z

308

Assessing the Performance of Multiple Regional Climate Model Simulations for Seasonal Mountain Snow in the Upper Colorado River Basin  

Science Conference Proceedings (OSTI)

This study assesses the performance of the regional climate model (RCM) simulations from the North American Regional Climate Change Assessment Program (NARCCAP) for the Upper Colorado River basin (UCRB), U.S. Rocky Mountains. The UCRB is a major ...

Nadine Salzmann; Linda O. Mearns

2012-04-01T23:59:59.000Z

309

NREL: Regional Energy Deployment System (ReEDS) Model - Unique Value of  

NLE Websites -- All DOE Office Websites (Extended Search)

Unique Value of ReEDS Unique Value of ReEDS Spatial Resolution and Variability Consideration The Regional Energy Deployment System (ReEDS) model has singular capabilities that differentiate it from other models and that make it uniquely suitable for certain types of analyses. While ReEDS can model all types of power generators and fuels-coal, gas, nuclear, renewables-it was designed primarily to address considerations for integrating renewable electric technologies into the power grid. In particular, it was designed to address the variable resource issues associated with solar and wind power as well as the remote nature of many of the best wind resources and their need for transmission. These capabilities require the two primary structural elements of ReEDS-a multiplicity of regions and a

310

Conceptual model for regional radionuclide transport from a salt dome repository: a technical memorandum  

Science Conference Proceedings (OSTI)

Disposal of high-level radioactive wastes is a major environmental problem influencing further development of nuclear energy in this country. Salt domes in the Gulf Coast Basin are being investigated as repository sites. A major concern is geologic and hydrologic stability of candidate domes and potential transport of radionuclides by groundwater to the biosphere prior to their degradation to harmless levels of activity. This report conceptualizes a regional geohydrologic model for transport of radionuclides from a salt dome repository. The model considers transport pathways and the physical and chemical changes that would occur through time prior to the radionuclides reaching the biosphere. Necessary, but unknown inputs to the regional model involve entry and movement of fluids through the repository dome and across the dome-country rock interface and the effect on the dome and surrounding strata of heat generated by the radioactive wastes.

Kier, R.S.; Showalter, P.A.; Dettinger, M.D.

1980-05-30T23:59:59.000Z

311

Sources of Sahel Precipitation for Simulated Drought and Rainy Seasons  

Science Conference Proceedings (OSTI)

The sources of sub-Saharan precipitation are studied using diagnostic procedures integrated into the code of the GISS climate model. Water vapor evaporating from defined source region is “tagged,” allowing the determination of the relative ...

Leonard M. Druyan; Randal D. Koster

1989-12-01T23:59:59.000Z

312

The Interactive Evolution of the Oceanic and Atmospheric Boundary Layers in the Source Regions of the Trades  

Science Conference Proceedings (OSTI)

Subtropical status tends to form over relatively cold water, its presence then keeps the water cold. We have investigated the resultant downstream development in the framework of an interactive, two-dimensional, steady-state model of the oceanic ...

Eric B. Kraus; Lynn D. Leslie

1982-12-01T23:59:59.000Z

313

Dynamical mass generation by source inversion: Calculating the mass gap of the Gross-Neveu model  

E-Print Network (OSTI)

We probe the U(N) Gross-Neveu model with a source-term $J\\bar{\\Psi}\\Psi$. We find an expression for the renormalization scheme and scale invariant source $\\hat{J}$, as a function of the generated mass gap. The expansion of this function is organized in such a way that all scheme and scale dependence is reduced to one single parameter d. We get a non-perturbative mass gap as the solution of $\\hat{J}=0$. In one loop we find that any physical choice for d gives good results for high values of N. In two loops we can determine d self-consistently by the principle of minimal sensitivity and find remarkably accurate results for N>2.

K. Van Acoleyen; H. Verschelde

2001-11-20T23:59:59.000Z

314

AN ANGLE-DEPENDENT SYNCHROTRON SELF-COMPTON MODEL FOR RELATIVISTIC JET SOURCES  

Science Conference Proceedings (OSTI)

We report on the development of a numerical code to calculate the angle-dependent synchrotron + synchrotron self-Compton radiation from relativistic jet sources with partially ordered magnetic fields and anisotropic particle distributions. Using a multi-zone radiation transfer approach, we can simulate magnetic-field configurations ranging from perfectly ordered (unidirectional) to randomly oriented (tangled). We demonstrate that synchrotron self-Compton model fits to the spectral energy distributions (SEDs) of extragalactic jet sources may be possible with a wide range of magnetic-field values, depending on their orientation with respect to the jet axis and the observer. This is illustrated with the example of a spectral fit to the SED of Mrk 421 from multiwavelength observations in 2006, where acceptable fits are possible with magnetic-field values varying within a range of an order of magnitude for different degrees of B-field alignment and orientation.

Jamil, O.; Boettcher, M. [Astrophysical Institute, Department of Physics and Astronomy, Ohio University, Athens, OH (United States)

2012-11-01T23:59:59.000Z

315

Open source software maturity model based on linear regression and Bayesian analysis  

E-Print Network (OSTI)

Open Source Software (OSS) is widely used and is becoming a significant and irreplaceable part of the software engineering community. Today a huge number of OSS exist. This becomes a problem if one needs to choose from such a large pool of OSS candidates in the same category. An OSS maturity model that facilitates the software assessment and helps users to make a decision is needed. A few maturity models have been proposed in the past. However, the parameters in the model are assigned not based on experimental data but on human experiences, feelings and judgments. These models are subjective and can provide only limited guidance for the users at the best. This dissertation has proposed a quantitative and objective model which is built from the statistical perspective. In this model, seven metrics are chosen as criteria for OSS evaluation. A linear multiple-regression model is created to assign a final score based on these seven metrics. This final score provides a convenient and objective way for the users to make a decision. The coefficients in the linear multiple-regression model are calculated from 43 OSS. From the statistical perspective, these coefficients are considered random variables. The joint distribution of the coefficients is discussed based on Bayesian statistics. More importantly, an updating rule is established through Bayesian analysis to improve the joint distribution, and thus the objectivity of the coefficients in the linear multiple-regression model, according to new incoming data. The updating rule provides the model the ability to learn and improve itself continually.

Zhang, Dongmin

2007-08-01T23:59:59.000Z

316

Influence of Precipitation Assimilation on a Regional Climate Model’s Surface Water and Energy Budgets  

Science Conference Proceedings (OSTI)

Initialization of the moisture profiles has been used to overcome the imbalance between analysis schemes and prediction models that generates the so-called spinup problem seen in the hydrological fields. Here precipitation assimilation through ...

Ana M. B. Nunes; John O. Roads

2007-08-01T23:59:59.000Z

317

New models for region of interest reader classification analysis in chest radiographs  

Science Conference Proceedings (OSTI)

In several computer-aided diagnosis (CAD) applications of image processing, there is no sufficiently sensitive and specific method for determining what constitutes a normal versus an abnormal classification of a chest radiograph. In the case of lung ... Keywords: 10.-v, 75.Pq, 87.85.Tu, Binary classification, Chest radiographs, Logic, set theory, and algebra, Mathematical procedures and computer techniques, Modeling biomedical systems, Pneumoconiosis, ROC analysis, Region of interest classification

M. S. Pattichis; T. Cacoullos; Peter Soliz

2009-06-01T23:59:59.000Z

318

Overview of Avista GHG Modeling NPCC Greenhouse Gas and the Regional Power System Conference  

E-Print Network (OSTI)

6/5/2013 1 Overview of Avista GHG Modeling NPCC Greenhouse Gas and the Regional Power System Natural Gas CO2 Emissions A Bridge to a Low Carbon Future, or the Future? 815 1,190 lbs/MWh Gas CCCT has ~35% of coal emissions on a per-MWh basis Gas CT has ~50% of coal emissions on a per-MWh basis 119 119

319

Improving the Noah Land Surface Model in Arid Regions with an Appropriate Parameterization of the Thermal Roughness Length  

Science Conference Proceedings (OSTI)

Daytime land surface temperatures in arid and semiarid regions are typically not well simulated in current land surface models (LSMs). This study first evaluates the importance of parameterizing the thermal roughness length (z0h) to model the ...

Yingying Chen; Kun Yang; Degang Zhou; Jun Qin; Xiaofeng Guo

2010-08-01T23:59:59.000Z

320

Simulations of Present and Future Climates in the Western United States with Four Nested Regional Climate Models  

Science Conference Proceedings (OSTI)

In this paper, the authors analyze simulations of present and future climates in the western United States performed with four regional climate models (RCMs) nested within two global ocean–atmosphere climate models. The primary goal here is to ...

P. B. Duffy; R. W. Arritt; J. Coquard; W. Gutowski; J. Han; J. Iorio; J. Kim; L.-R. Leung; J. Roads; E. Zeledon

2006-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Regional Climate Model Simulations of U.S. Precipitation and Surface Air Temperature during 1982–2002: Interannual Variation  

Science Conference Proceedings (OSTI)

The fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5)-based regional climate model (CMM5) capability in simulating the interannual variations of U.S. precipitation and surface air temperature during 1982–2002 is evaluated ...

Jinhong Zhu; Xin-Zhong Liang

2007-01-01T23:59:59.000Z

322

Assessing the Capability of a Regional-Scale Weather Model to Simulate Extreme Precipitation Patterns and Flooding in Central Texas  

Science Conference Proceedings (OSTI)

A regional-scale weather model is used to determine the potential for flood forecasting based on model-predicted rainfall. Extreme precipitation and flooding events are a significant concern in central Texas, due to both the high occurrence and ...

Marla R. Knebl Lowrey; Zong-Liang Yang

2008-12-01T23:59:59.000Z

323

Pacific Northwest Climate Sensitivity Simulated by a Regional Climate Model Driven by a GCM. Part I: Control Simulations  

Science Conference Proceedings (OSTI)

A model nesting approach has been used to simulate the regional climate over the Pacific Northwest. The present-day global climatology is first simulated using the NCAR Community Climate Model (CCM3) driven by observed sea surface temperature and ...

L. R. Leung; S. J. Ghan

1999-07-01T23:59:59.000Z

324

A Numerical Modeling System of the Hydrological Cycle for Estimation of Water Fluxes in the Huaihe River Plain Region, China  

Science Conference Proceedings (OSTI)

To analyze the water budget under human influences in the Huaihe River plain region in China, the authors have developed a numerical modeling system that integrates water flux algorithms into a platform created by coupling a soil moisture model ...

Xi Chen; Yongqin David Chen; Zhicai Zhang

2007-08-01T23:59:59.000Z

325

A Comparison of Regional Isentropic-Sigma and Sigma Model Simulations of the January 1979 Chicago Blizzard  

Science Conference Proceedings (OSTI)

In an initial effort in regional numerical weather prediction, results from the University of Wisconsin isentropic-sigma (UW ???) hybrid model and an “identical” sigma model are compared. The two main objectives are to demonstrate the capability ...

Tom H. Zapotocny; Donald R. Johnson; Fred M. Reames

1993-07-01T23:59:59.000Z

326

Final Report on Hierarchical Coupled Modeling and Prediction of Regional Climate Change in the Atlantic Sector  

SciTech Connect

During the course of this project, we have accomplished the following: a) Carried out studies of climate changes in the past using a hierarchy of intermediate coupled models (Chang et al., 2008; Wan et al 2009; Wen et al., 2010a,b) b) Completed the development of a Coupled Regional Climate Model (CRCM; Patricola et al., 2011a,b) c) Carried out studies testing hypotheses testing the origin of systematic errors in the CRCM (Patricola et al., 2011a,b) d) Carried out studies of the impact of air-sea interaction on hurricanes, in the context of barrier layer interactions (Balaguru et al)

Saravanan, Ramalingam [Texas A& M University

2011-10-30T23:59:59.000Z

327

Two-dimensional modeling of high plasma density inductively coupled sources for materials processing  

SciTech Connect

Inductively coupled plasma sources are being developed to address the need for high plasma density (10[sup 11]--10[sup 12] cm[sup [minus]3]), low pressure (a few to 10--20 mTorr) etching of semiconductor materials. One such device uses a flat spiral coil of rectangular cross section to generate radio-frequency (rf) electric fields in a cylindrical plasma chamber, and capacitive rf biasing on the substrate to independently control ion energies incident on the wafer. To investigate these devices we have developed a two-dimensional hybrid model consisting of electromagnetic, electron Monte Carlo, and hydrodynamic modules; and an off line plasma chemistry Monte Carlo simulation. The results from the model for plasma densities, plasma potentials, and ion fluxes for Ar, O[sub 2], Ar/CF[sub 4]/O[sub 2] gas mixtures will be presented.

Ventzek, P.L.G.; Hoekstra, R.J.; Kushner, M.J. (Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801 (United States))

1994-01-01T23:59:59.000Z

328

Short-Term Energy Outlook Model Documentation: Macro Bridge Procedure to Update Regional Macroeconomic Forecasts with National Macroeconomic Forecasts  

Reports and Publications (EIA)

The Regional Short-Term Energy Model (RSTEM) uses macroeconomic variables such as income, employment, industrial production and consumer prices at both the national and regional1 levels as explanatory variables in the generation of the Short-Term Energy Outlook (STEO). This documentation explains how national macroeconomic forecasts are used to update regional macroeconomic forecasts through the RSTEM Macro Bridge procedure.

Information Center

2010-06-01T23:59:59.000Z

329

Water vapor transmittance models for narrow bands in the 13 to 19. mu. m spectral region  

Science Conference Proceedings (OSTI)

The purpose of this report is to document the development of water vapor transmittance models for narrow bands (satellite sensor channels) in the 13 to 19 ..mu..m spectral region. The models are the result of research efforts of the author in 1971-1972 while on active duty with the US Air Force at the Air Force Global Weather Central (AFGWC). The models were developed for application in studies involving a temperature profiling sensor system carried aboard the satellites of the Defense Meteorological Satellite Program (DMSP), formerly DAPP. Recently, (Lovill et al., 1978; Luther et al., 1981) the models were implemented for studies concerned with methodologies to retrieve total atmospheric column ozone from measurements of newer DMSP Block 5D series satellite sensors with similar channels (see Nichols, 1975).

Weichel, R.L.

1983-10-01T23:59:59.000Z

330

Modeling the Dynamics of Desakota Regions: Global - Local Nexus in the Taipei Metropolitan Area  

E-Print Network (OSTI)

Since the 1970s, Asia has experienced rapid urbanization processes, which are distinct from U.S. society, and the direction of Asian urbanization is more strongly affected by economic globalization. The desakota model, proposed by McGee and Ginsburg in 1991, focuses on how internal domestic and local forces drive the specific rural-urban transformation in Asia. However, the McGee-Ginsburg model does not emphasize the importance of globalization on Asian urbanization. To fill the gap, this study develops a GIS-based CA framework based on the desakota model to not only simulate the unique urbanization processes in Asia but also integrate the influence of globalization into Asian urban dynamics. Three approaches are developed in the CA simulation: 1) physical constraints and land-use classification from remotely sensed images in 1993, 2000, and 2008, are incorporated into micro-scale transformation; 2) population dynamics, shifts of economic activities, and foreign direct investment (FDIs), a representative of the impact of globalization, are applied for multi-scale interconnection; 3) the Monte Carlo mechanism is finally introduced to combine the above two approaches and implement the simulation process. The Taipei metropolitan area, a rapid urbanizing region that highly interacts with the global economy in Asia, is chosen to examine this model. The CA simulation model establishes a strong interaction between FDIs, an indicator representing impacts of globalization, and the dazzling Asian urban model. The combination of multi-scale economic factors and micro-scale land-use transformation also reveals how urban growth of the Taipei metropolis in recent years fits the characterization of the desakota model, and how desakota regions, the growth generators, interact with city cores. As a result, the research not only successfully links the influence of globalization with the desakota model and simulates urban dynamics of Asian cities but also provides scenarios of different FDI inputs for governments to better handle urban growth with global impacts under the deep economic recession since 2007.

Wu, Bing-Sheng

2009-08-01T23:59:59.000Z

331

Analytical risk-based model of gaseous and liquid-phase radon transport in landfills with radium sources  

Science Conference Proceedings (OSTI)

An analytical model of gaseous and liquid-phase radon transport through soils is derived for environmental modeling of landfills containing uranium mill tailings or Ra-226 sources. Processes include radon diffusion in both the gas and liquid phases, ... Keywords: Landfill, Multiphase, Performance assessment, Probabilistic modeling, Radium, Radon, Transport

Clifford K. Ho

2008-09-01T23:59:59.000Z

332

Assessing FPAR Source and Parameter Optimization Scheme in Application of a Diagnostic Carbon Flux Model  

Science Conference Proceedings (OSTI)

The combination of satellite remote sensing and carbon cycle models provides an opportunity for regional to global scale monitoring of terrestrial gross primary production, ecosystem respiration, and net ecosystem production. FPAR (the fraction of photosynthetically active radiation absorbed by the plant canopy) is a critical input to diagnostic models, however little is known about the relative effectiveness of FPAR products from different satellite sensors nor about the sensitivity of flux estimates to different parameterization approaches. In this study, we used multiyear observations of carbon flux at four eddy covariance flux tower sites within the conifer biome to evaluate these factors. FPAR products from the MODIS and SeaWiFS sensors, and the effects of single site vs. cross-site parameter optimization were tested with the CFLUX model. The SeaWiFs FPAR product showed greater dynamic range across sites and resulted in slightly reduced flux estimation errors relative to the MODIS product when using cross-site optimization. With site-specific parameter optimization, the flux model was effective in capturing seasonal and interannual variation in the carbon fluxes at these sites. The cross-site prediction errors were lower when using parameters from a cross-site optimization compared to parameter sets from optimization at single sites. These results support the practice of multisite optimization within a biome for parameterization of diagnostic carbon flux models.

Turner, D P; Ritts, W D; Wharton, S; Thomas, C; Monson, R; Black, T A

2009-02-26T23:59:59.000Z

333

Thermodynamics of the Madden-Julian Oscillation in a Regional Model with Constrained Moisture  

Science Conference Proceedings (OSTI)

In order to identify the main thermodynamic processes that sustain the Madden Julian Oscillation, an eddy available potential energy budget analysis is performed on a WRF simulation with moisture constrained by observations. The model realistically simulates the two MJO episodes observed during the winter of 2007-2008. The analysis shows that instabilities and damping associated with variations in diabatic heating and energy transport work in concert to provide the MJO with its observed characteristics. The results are used to construct a simplified paradigm of MJO thermodynamics. Furthermore, the effect of moisture nudging on the simulation is analyzed to understand the limitations of the model cumulus parameterization. Without moisture nudging, the parameterization fails to provide adequate low-level (upper-level) moistening during the early (late) stage of the MJO active phase. The moistening plays a critical role in providing stratiform heating variability that is an important source of eddy available potential energy for the model MJO.

Hagos, Samson M.; Leung, Lai-Yung R.; Dudhia, Jimy

2011-09-01T23:59:59.000Z

334

Utility of Remote Sensing–Based Two-Source Energy Balance Model under Low- and High-Vegetation Cover Conditions  

Science Conference Proceedings (OSTI)

Two resistance network formulations that are used in a two-source model for parameterizing soil and canopy energy exchanges are evaluated for a wide range of soybean and corn crop cover and soil moisture conditions during the Soil Moisture–...

Fuqin Li; William P. Kustas; John H. Prueger; Christopher M. U. Neale; Thomas J. Jackson

2005-12-01T23:59:59.000Z

335

Analytical Modeling of Wave Generation by the Borehole Orbital Vibrator Source  

E-Print Network (OSTI)

of the source as a function of wave frequency and rockon the source-fluid boundary and the fluid-rock boundary. ToP2 1731 m/s Rock S velocity c S2 Source/borehole parameters

Nakagawa, Seiji; Daley, Thomas M.

2004-01-01T23:59:59.000Z

336

Simulation of the Stable Water Isotopes in Precipitation over South America: Comparing Regional to Global Circulation Models  

Science Conference Proceedings (OSTI)

A simulation of the stable water isotope cycle over South America by the regional circulation model REMOiso is discussed. The performance of the regional model, with a resolution of 0.5° (55 km), is compared to simulations by the global ...

Christophe Sturm; Georg Hoffmann; Bärbel Langmann

2007-08-01T23:59:59.000Z

337

Advanced modeling of vertical ground source heat pumps using finite element techniques.  

E-Print Network (OSTI)

??Increasing energy demand and environmental pollution in United States has been led toward using renewable energy sources over recent decades. Ground-source heat pump systems are… (more)

Komari Zadeh, Seyed Omid

2011-01-01T23:59:59.000Z

338

A Model for Probability Nowcasts of Accumulated Precipitation Using Radar  

Science Conference Proceedings (OSTI)

A new model for making probability forecasts of accumulated spot precipitation from weather radar data is presented. The model selects a source region upwind of the forecast spot. All pixels (horizontal size 2 × 2 km2) within the source region ...

Tage Andersson; Karl-Ivar Ivarsson

1991-01-01T23:59:59.000Z

339

Source Release Modeling for the Idaho National Engineering and Environmental Laboratory's Subsurface Disposal Area  

SciTech Connect

A source release model was developed to determine the release of contaminants into the shallow subsurface, as part of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) evaluation at the Idaho National Engineering and Environmental Laboratory's (INEEL) Subsurface Disposal Area (SDA). The output of the source release model is used as input to the subsurface transport and biotic uptake models. The model allowed separating the waste into areas that match the actual disposal units. This allows quantitative evaluation of the relative contribution to the total risk and allows evaluation of selective remediation of the disposal units within the SDA.

Becker, Bruce Harley

2002-08-01T23:59:59.000Z

340

Nanoflare statistics in an active region 3D MHD coronal model  

E-Print Network (OSTI)

Context. We investigate the statistics of the spatial and temporal distribution of the coronal heating in a three-dimensional magneto- hydrodynamical (3D MHD) model. The model describes the temporal evolution of the corona above an observed active region. The model is driven by photospheric granular motions which braid the magnetic field lines. This induces currents and their dissipation heats the plasma. We evaluate the transient heating as subsequent heating events and analyze their statistics. The results are then interpreted in the context of observed flare statistics and coronal heating mechanisms. Methods. To conduct the numerical experiment we use a high order finite difference code which solves the partial differential equations for the conservation of mass, the momentum and energy balance, and the induction equation. The energy balance includes the Spitzer heat conduction and the optical thin radiative loss in the corona. Results. The temporal and spatial distribution of the Ohmic heating in the 3D M...

Bingert, Sven

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Model simulations of continuous ion injection into electron-beam ion source trap with slanted electrostatic mirror  

Science Conference Proceedings (OSTI)

The efficiency of trapping ions in an electron-beam ion source (EBIS) is of primary importance for many applications requiring operations with externally produced ions: RIA breeders, ion sources, and traps. At the present time, the most popular method of ion injection is pulsed injection, when short bunches of ions get trapped in a longitudinal trap while traversing the trap region. Continuous trapping is a challenge for EBIS devices because mechanisms which reduce the longitudinal ion energy per charge in a trap (cooling with residual gas, energy exchange with other ions, and ionization) are not very effective, and accumulation of ions is slow. A possible approach to increase trapping efficiency is to slant the mirror at the end of the trap which is opposite to the injection end. A slanted mirror will convert longitudinal motion of ions into transverse motion, and, by reducing their longitudinal velocity, prevent these ions from escaping the trap on their way out. The trade-off for the increased trapping efficiency this way is an increase in the initial transverse energy of the accumulated ions. The slanted mirror can be realized if the ends of two adjacent electrodes, drift tubes, which act as an electrostatic mirror, are machined to produce a slanted gap, rather than an upright one. Applying different voltages to these electrodes will produce a slanted mirror. The results of two-dimensional (2D) and three-dimensional (3D) computer simulations of the ion injection into an EBIS are presented using simplified models of an EBIS with conical (2D simulations) and slanted (3D simulations) mirror electrodes.

Pikin, A.; Kponou, A.; Alessi, J. G.; Beebe, E. N.; Prelec, K.; Raparia, D. [Brookhaven National Laboratory, Upton, New York 11973 (United States)

2008-02-15T23:59:59.000Z

342

Dose Reconstruction Using Computational Modeling of Handling a Particular Arsenic-73/Arsenic-74 Source  

E-Print Network (OSTI)

A special work evolution was performed at Los Alamos National Laboratory (LANL) with a particular 73As/74As source but the worker’s extremity dosimeter did not appear to provide appropriate dosimetric information for the tasks performed. This prompted a reconstruction of the dose to the worker’s hands. The computer code MCNP was chosen to model the tasks that the worker performed to evaluate the potential nonuniform hand dose distribution. A model was constructed similar to the worker’s hands to represent the performed handling tasks. The model included the thumb, index finger, middle finger, and the palm. The dose was calculated at the 7 mg cm-2 skin depth. To comply with the Code of Federal Regulations, 10 CFR 835, the 100 cm2 area that received the highest dose must be calculated. It could be determined if the dose received by the worker exceeded any regulatory limit. The computer code VARSKIN was also used to provide results to compare with those from MCNP where applicable. The results from the MCNP calculations showed that the dose to the worker’s hands did not exceed the regulatory limit of 0.5 Sv (50 rem). The equivalent nonuniform dose was 0.126 Sv (12.6 rem) to the right hand and 0.082 Sv (8.2 rem) to the left hand.

Stallard, Alisha M.

2010-05-01T23:59:59.000Z

343

Modeling the Market Potential of Hydrogen from Wind and Competing Sources: Preprint  

NLE Websites -- All DOE Office Websites (Extended Search)

8 8 May 2005 Modeling the Market Potential of Hydrogen from Wind and Competing Sources Preprint W. Short, N. Blair, and D. Heimiller To be presented at WINDPOWER 2005 Denver, Colorado May 15-18, 2005 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any

344

Meteorological Patterns Associated with Maximum 3-Hour Average Concentrations Predicted by the CRSTER Model for a Tall Stack Source  

Science Conference Proceedings (OSTI)

Regional meteorological patterns associated with maximum 3-hour average concentrations predicted by the U.S. EPA CRSTER model for emissions from a tall stack were examined for a limited sample. Causes of predicted peaks were the movements of weak ...

Paul N. Derezotes

1984-11-01T23:59:59.000Z

345

Spectrum of Solar Type I Continuum Noise Storm in the 50- 80 MHz band, and Plasma characteristics in the associated source region  

E-Print Network (OSTI)

Continuum observations of a solar noise storm in the frequency range of 50-80 MHz observed with the Gauribidanur radio spectrograph during 2000 September, 26 & 27, are presented here. The radio spectral index of the noise storm continuum in the band 50- 80 MHz is found to be ? 3.65 during the above period. The Noise Storm continuum radiation is explained as a consequence of the non-thermal, plasma emission mechanism. The beam-density of suprathermal electrons is estimated for the coronal plasma near the source region of storm radiation. Supplementary evidence for the density-estimate is provided by way of analysing the imaging data from the SXT on-board the Yohkoh spacecraft, and the LASCO, MDI, and EIT on board the SoHO spacecraft. Subject headings: Sun: radio radiation — radiation mechanisms: non-thermal —

G. A. Shanmugha Sundaram; K. R. Subramanian

2004-01-01T23:59:59.000Z

346

Spectrum of Solar Type I Continuum Noise Storm in the 50 - 80 MHz band, and Plasma characteristics in the associated source region  

E-Print Network (OSTI)

Continuum observations of a solar noise storm in the frequency range of 50 - 80 MHz observed with the Gauribidanur radio spectrograph during 2000 September, 26 & 27, are presented here. The radio spectral index of the noise storm continuum in the band 50 - 80 MHz is found to be ~3.65 during the above period. The Noise Storm continuum radiation is explained as a consequence of the non-thermal, plasma emission mechanism. The beam-density of suprathermal electrons is estimated for the coronal plasma near the source region of storm radiation. Supplementary evidence for the density-estimate is provided by way of analysing the imaging data from the SXT on-board the Yohkoh spacecraft, and the LASCO, MDI, and EIT on board the SoHO spacecraft.

G. A. Shanmugha Sundaram; K. R. Subramanian

2004-01-20T23:59:59.000Z

347

Spectrum of Solar Type I Continuum Noise Storm in the 50 - 80 MHz band, and Plasma characteristics in the associated source region  

E-Print Network (OSTI)

Continuum observations of a solar noise storm in the frequency range of 50 - 80 MHz observed with the Gauribidanur radio spectrograph during 2000 September, 26 & 27, are presented here. The radio spectral index of the noise storm continuum in the band 50 - 80 MHz is found to be ~3.65 during the above period. The Noise Storm continuum radiation is explained as a consequence of the non-thermal, plasma emission mechanism. The beam-density of suprathermal electrons is estimated for the coronal plasma near the source region of storm radiation. Supplementary evidence for the density-estimate is provided by way of analysing the imaging data from the SXT on-board the Yohkoh spacecraft, and the LASCO, MDI, and EIT on board the SoHO spacecraft.

Sundaram, G A S

2004-01-01T23:59:59.000Z

348

Original article: Power flow Petri Net modelling for building integrated multi-source power system with smart grid interaction  

Science Conference Proceedings (OSTI)

This paper presents an energy management modelling of a multi-source power system composed of photovoltaic (PV) array, storage and power grid connection, and taking into account messages from smart grid. The designed system can supply a tertiary building ... Keywords: Energy management, Petri Net modelling, Photovoltaic, Smart grid, Stateflow

B. C. Wang, M. Sechilariu, F. Locment

2013-05-01T23:59:59.000Z

349

Improvements to Regional Explosion Identification using Attenuation Models of the Lithosphere  

Science Conference Proceedings (OSTI)

Regional P/S amplitudes have been recognized as an effective discriminant between earthquakes and explosions. While closely spaced earthquake and explosions generally discriminate easily, the application of this technique to broad regions has been hampered by large variations in the amplitude of regional phases due to the attenuation structure of the crust and upper mantle. Making use of a recent P-wave and S-wave attenuation model of the lithosphere, we have found that correcting the events using our amplitude methodology significantly reduces the scattering in the earthquake population. We demonstrate an application of this technique to station NIL (Nilore, Pakistan) using broad area earthquakes and the 1998 Indian nuclear explosion recorded at the station using the Pn/Lg discriminant in the 1-2 Hz passband. We find that the explosion, which is lost in the scatter of the earthquakes in the uncorrected discriminant, clearly separates by correcting for the attenuation structure. We see a similar reduction in scatter and separation for the Pn/Sn and Pg/Lg discriminants in the same passband.

Pasyanos, M E; Walter, W R

2009-03-30T23:59:59.000Z

350

Landscape Based Modeling of Nonpoint Source Nitrogen Loading in the Neuse River Basin, North Carolina  

Science Conference Proceedings (OSTI)

The objective of this research was to arrive at a quantitative and qualitative assessment of nonpoint sources of potential excess N under different land use/land cover (LULC) categories in the Neuse River Basin on a seasonal time scale. This assessment is being supplied to EPA's Landscape Characterization Branch, National Exposure Research Laboratory, in Research Triangle Park, NC, for inclusion in a hydrologic model to predict seasonal fluxes of N from the terrestrial landscape to surface receiving waters and groundwater in the Neuse River Basin. The analysis was performed in the following five steps: (1) development of a conceptual model to predict potential excess N on land, (2) a literature review to parameterize N fluxes under LULC categories found in the Neuse River Basin, (3) acquisition of high resolution (15-m pixel) LULC data from EPA's Landscape Characterization Branch, National Exposure Research Laboratory, in Research Triangle Park, NC, (4) acquisition of a soil N inventory map for the Neuse River Basin, (5) calculations of potential excess N on a seasonal basis for the entire Neuse River Basin.

Garten, C.T.

2001-01-11T23:59:59.000Z

351

Reverberation mapping and the disk wind model of the broad line region  

E-Print Network (OSTI)

Using the disk wind model of Murray et al. (1995), we calculate line profiles and frequency-resolved response functions for broad line emission from the surface of an accretion disk in an AGN in the presence of a radiatively driven wind. We find that the combined effects of the shears in the wind and in the disk itself produce anisotropic line emission which solves several well-known problems connected with disk models of the broad line region. In particular, the broadening of resonance lines such as \\Civ, \\Lya, and \\Nv\\/ can be attributed to orbital motion of the disk gas at radii as close as \\sim 10^{16}~cm in Seyferts without requiring unrealistically large emission regions in order to produce single-peaked profiles. Furthermore, the anisotropy of the line emission results in frequency-dependent response functions which are no longer red-blue symmetric so that the time delays inferred for the various red and blue components of the line agree qualitatively with recent reverberation mapping observations of N...

Chiang, J

1995-01-01T23:59:59.000Z

352

Conceptual model for regional radionuclide transport from a basalt repository site. Final draft, technical memorandum  

SciTech Connect

This technical memorandum was prepared to: (1) describe a typical basalt radionuclide repository site, (2) describe geologic and hydrologic processes associated with regional radionuclide transport in basalts, (3) define the parameters required to model regional radionuclide transport from a basalt repository site, and (4) develop a ''conceptual model'' of radionuclide transport from a basalt repository site. In a general hydrological sense, basalts may be described as layered sequences of aquifers and aquitards. The Columbia River Basalt, centered near the semi-arid Pasco Basin, is considered by many to be typical basalt repository host rock. Detailed description of the flow system including flow velocities with high-low hydraulic conductivity sequences are not possible with existing data. However, according to theory, waste-transport routes are ultimately towards the Columbia River and the lengths of flow paths from the repository to the biosphere may be relatively short. There are many physical, chemical, thermal, and nuclear processes with associated parameters that together determine the possible pattern of radionuclide migration in basalts and surrounding formations. Brief process descriptions and associated parameter lists are provided. Emphasis has been placed on the use of the distribution coefficient in simulating ion exchange. The use of the distribution coefficient approach is limited because it takes into account only relatively fast mass transfer processes. In general, knowledge of hydrogeochemical processes is primitive.

Walton, W.C.; Voorhees, M.L.; Prickett, T.A.

1980-05-23T23:59:59.000Z

353

MODELING SUPER-FAST MAGNETOSONIC WAVES OBSERVED BY SDO IN ACTIVE REGION FUNNELS  

SciTech Connect

Recently, quasi-periodic, rapidly propagating waves have been observed in extreme ultraviolet by the Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) instrument in about 10 flare/coronal mass ejection (CME) events thus far. A typical example is the 2010 August 1 C3.2 flare/CME event that exhibited arc-shaped wave trains propagating in an active region (AR) magnetic funnel with {approx}5% intensity variations at speeds in the range of 1000-2000 km s{sup -1}. The fast temporal cadence and high sensitivity of AIA enabled the detection of these waves. We identify them as fast magnetosonic waves driven quasi-periodically at the base of the flaring region and develop a three-dimensional MHD model of the event. For the initial state we utilize the dipole magnetic field to model the AR and include gravitationally stratified density at coronal temperature. At the coronal base of the AR, we excite the fast magnetosonic wave by periodic velocity pulsations in the photospheric plane confined to a funnel of magnetic field lines. The excited fast magnetosonic waves have similar amplitude, wavelength, and propagation speeds as the observed wave trains. Based on the simulation results, we discuss the possible excitation mechanism of the waves, their dynamical properties, and the use of the observations for coronal MHD seismology.

Ofman, L. [Department of Physics, Catholic University of America, Washington, DC 20064 (United States); Liu, W.; Title, A.; Aschwanden, M. [Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA 94304 (United States)

2011-10-20T23:59:59.000Z

354

Assessment of the Regional Climate Model Version 3 over the Maritime Continent Using Different Cumulus Parameterization and Land Surface Schemes  

Science Conference Proceedings (OSTI)

This paper describes an assessment of the Regional Climate Model, version 3 (RegCM3), coupled to two land surface schemes: the Biosphere–Atmosphere Transfer System, version 1e (BATS1e), and the Integrated Biosphere Simulator (IBIS). The model’s ...

Rebecca L. Gianotti; Dongfeng Zhang; Elfatih A. B. Eltahir

2012-01-01T23:59:59.000Z

355

A One-Dimensional (1-D) Three-Region Model for a Bubbling Fluidized-Bed Adsorber  

SciTech Connect

A general one-dimensional (1-D), three-region model for a bubbling fluidized-bed adsorber with internal heat exchangers has been developed. The model can predict the hydrodynamics of the bed and provides axial profiles for all temperatures, concentrations, and velocities. The model is computationally fast and flexible and allows for any system of adsorption and desorption reactions to be modeled, making the model applicable to any adsorption process. The model has been implemented in both gPROMS and Aspen Custom Modeler, and the behavior of the model has been verified.

Lee, Andrew; Miller, David C.

2012-01-01T23:59:59.000Z

356

Effects of Emissions Reductions on Ozone Predictions by the Regional Oxidant Model during the July 1988 Episode  

Science Conference Proceedings (OSTI)

The U.S. Environmental Protection Agency Regional Oxidant Model, ROM2.2, was applied to a 2?10 July 1988 episode to test the regional episodic ozone response to different combinations of the across-the-board nitrogen oxides (NOx) and volatile ...

Shao-Hang Chu; William M. Cox

1995-03-01T23:59:59.000Z

357

A Simplified Diagnostic Model of Orographic Rainfall for Enhancing Satellite-Based Rainfall Estimates in Data-Poor Regions  

Science Conference Proceedings (OSTI)

An extension of Sinclair's diagnostic model of orographic precipitation (“VDEL”) is developed for use in data-poor regions to enhance rainfall estimates. This extension (VDELB) combines a 2D linearized internal gravity wave calculation with the ...

Chris Funk; Joel Michaelsen

2004-10-01T23:59:59.000Z

358

Regional Climate Modeling for the Developing World: The ICTP RegCM3 and RegCNET  

Science Conference Proceedings (OSTI)

Regional climate models are important research tools available to scientists around the world, including in economically developing nations (EDNs). The Earth Systems Physics (ESP) group of the Abdus Salam International Centre for Theoretical ...

Jeremy S. Pal; Filippo Giorgi; Xunqiang Bi; Nellie Elguindi; Fabien Solmon; Sara A. Rauscher; Xuejie Gao; Raquel Francisco; Ashraf Zakey; Jonathan Winter; Moetasim Ashfaq; Faisal S. Syed; Lisa C. Sloan; Jason L. Bell; Noah S. Diffenbaugh; Jagadish Karmacharya; Abourahamane Konaré; Daniel Martinez; Rosmeri P. da Rocha; Allison L. Steiner

2007-09-01T23:59:59.000Z

359

Considerations in the Selection of Global Climate Models for Regional Climate Projections: The Arctic as a Case Study  

Science Conference Proceedings (OSTI)

Climate projections at regional scales are in increased demand from management agencies and other stakeholders. While global atmosphere–ocean climate models provide credible quantitative estimates of future climate at continental scales and above,...

James E. Overland; Muyin Wang; Nicholas A. Bond; John E. Walsh; Vladimir M. Kattsov; William L. Chapman

2011-03-01T23:59:59.000Z

360

Customization of RegCM3 Regional Climate Model for Eastern Africa and a Tropical Indian Ocean Domain  

Science Conference Proceedings (OSTI)

Rainfall is a driving factor of climate in the tropics and needs to be properly represented within a climate model. This study customizes the precipitation processes over the tropical regions of eastern Africa and the Indian Ocean using the ...

Neil Davis; Jared Bowden; Fredrick Semazzi; Lian Xie; Bari? Önol

2009-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

A Joint Estimate of the Precipitation Climate Signal in Europe Using Eight Regional Models and Five Observational Datasets  

Science Conference Proceedings (OSTI)

This paper presents an analysis of the precipitation climate signal in Europe emerging from a simulation of heterogeneous regional climate models (RCMs) using five observational datasets as the reference for present day climate conditions. ...

Francisco J. Tapiador

2010-04-01T23:59:59.000Z

362

Data Assimilation in a Quasi-geostrophic Open-Ocean Model of the Gulf Stream Region Using the Adjoint Method  

Science Conference Proceedings (OSTI)

The method of adjoint data assimilation is applied in a quasi-geostrophic (QG) open-ocean model of the Gulf Stream region. The results of data assimilation experiments are presented in which simulated AXBT and satellite altimeter observations are ...

Andrew M. Moore

1991-03-01T23:59:59.000Z

363

Possibility of Skill Forecast Based on the Finite-Time Dominant Linear Solutions for a Primitive Equation Regional Forecast Model  

Science Conference Proceedings (OSTI)

The possibility of using forecast errors originating from the finite-time dominant linear modes for the prediction of forecast skill for a primitive equation regional forecast model is studied. This is similar to the method for skill prediction ...

Tomislava Vuki?evi?

1993-06-01T23:59:59.000Z

364

Hydrological Processes in Regional Climate Model Simulations of the Central United States Flood of June–July 1993  

Science Conference Proceedings (OSTI)

Thirteen regional climate model (RCM) simulations of June–July 1993 were compared with each other and observations. Water vapor conservation and precipitation characteristics in each RCM were examined for a 10° × 10° subregion of the upper ...

Christopher J. Anderson; Raymond W. Arritt; Zaitao Pan; Eugene S. Takle; William J. Gutowski Jr.; Francis O. Otieno; Renato da Silva; Daniel Caya; Jens H. Christensen; Daniel Lüthi; Miguel A. Gaertner; Clemente Gallardo; Filippo Giorgi; René Laprise; Song-You Hong; Colin Jones; H-M. H. Juang; J. J. Katzfey; John L. McGregor; William M. Lapenta; Jay W. Larson; John A. Taylor; Glen E. Liston; Roger A. Pielke Sr.; John O. Roads

2003-06-01T23:59:59.000Z

365

An Assessment of Possible Climate Change in the Australian Region Based on an Intercomparison of General Circulation Modeling Results  

Science Conference Proceedings (OSTI)

To assist in estimating likely future climate change in the Australian region, the authors examine the results of four different general circulation modeling experiments run to assess the equilibrium impact of doubling greenhouse gases. The ...

P. H. Whetton; A. B. Pittock; M. R. Haylock; P. J. Rayner

1994-03-01T23:59:59.000Z

366

Performance of NCEP Regional Wave Models in Predicting Peak Sea States during the 2005 North Atlantic Hurricane Season  

Science Conference Proceedings (OSTI)

Unprecedented numbers of tropical cyclones occurred in the North Atlantic Ocean and the Gulf of Mexico in 2005. This provides a unique opportunity to evaluate the performance of two operational regional wave forecasting models at the National ...

Yung Y. Chao; Hendrik L. Tolman

2010-10-01T23:59:59.000Z

367

Evaluation of a Regional Atmospheric Model Using Measurements of Surface Heat Exchange Processes from a Site in Antarctica  

Science Conference Proceedings (OSTI)

A regional atmospheric climate model with a horizontal grid spacing of 55 km has been used to simulate the Antarctic atmosphere during an austral summer period. ECMWF reanalyses were used to force the atmospheric prognostic variables from the ...

Nicole P. M. van Lipzig; Erik van Meijgaard; Johannes Oerlemans

1999-09-01T23:59:59.000Z

368

Development of an Antarctic Regional Climate System Model. Part I: Sea Ice and Large-Scale Circulation  

Science Conference Proceedings (OSTI)

A coupled atmosphere–ice regional model previously used for simulations in the Arctic has been implemented in the Antarctic. Three 14-month simulations were performed for 1988–89, with different oceanic specifications. The year 1988 was ...

David A. Bailey; Amanda H. Lynch

2000-04-01T23:59:59.000Z

369

Regional Model Simulations of Marine Boundary Layer Clouds over the Southeast Pacific off South America. Part I: Control Experiment  

Science Conference Proceedings (OSTI)

A regional climate model is used to simulate boundary layer stratocumulus (Sc) clouds over the southeast Pacific off South America during August–October 1999 and to study their dynamical, radiative, and microphysical properties and their ...

Yuqing Wang; Shang-Ping Xie; Haiming Xu; Bin Wang

2004-01-01T23:59:59.000Z

370

Operational Implementation of the ISBA Land Surface Scheme in the Canadian Regional Weather Forecast Model. Part I: Warm Season Results  

Science Conference Proceedings (OSTI)

The summertime improvement resulting from the operational implementation of a new surface modeling and assimilation strategy into the Canadian regional weather forecasting system is described in this study. The surface processes over land are ...

Stéphane Bélair; Louis-Philippe Crevier; Jocelyn Mailhot; Bernard Bilodeau; Yves Delage

2003-04-01T23:59:59.000Z

371

Development of New Ensemble Methods Based on the Performance Skills of Regional Climate Models over South Korea  

Science Conference Proceedings (OSTI)

In this paper, the prediction skills of five ensemble methods for temperature and precipitation are discussed by considering 20 yr of simulation results (from 1989 to 2008) for four regional climate models (RCMs) driven by NCEP–Department of ...

M.-S. Suh; S.-G. Oh; D.-K. Lee; D.-H. Cha; S.-J. Choi; C.-S. Jin; S.-Y. Hong

2012-10-01T23:59:59.000Z

372

Regional Parameter Estimation of the VIC Land Surface Model: Methodology and Application to River Basins in China  

Science Conference Proceedings (OSTI)

This paper presents a methodology for regional parameter estimation of the three-layer Variable Infiltration Capacity (VIC-3L) land surface model with the goal of improving the streamflow simulation for river basins in China. This methodology is ...

Zhenghui Xie; Fei Yuan; Qingyun Duan; Jing Zheng; Miaoling Liang; Feng Chen

2007-06-01T23:59:59.000Z

373

Incorporation of aqueous reaction kinetics and biodegradation into TOUGHREACT: Application of a multi-region model to hydrobiogeoChemical transport of denitrification and sulfate reduction  

E-Print Network (OSTI)

interplay between Bio- and Chem- Regions will be illustratedThe same A was used for Bio- and Chem- Regions. In fact,1. Concept of a Hydro-Bio-Chem Region model for resolving

Xu, Tianfu

2008-01-01T23:59:59.000Z

374

Measurement and apportionment of radon source terms for modeling indoor environments  

SciTech Connect

During the present 2 1/2 year contract period, we have made significant Progress in modeling the source apportionment of indoor [sup 222]Rn and in [sup 222]Rn decay product dosimetry. Two additional areas were worked on which we believe are useful for the DOE Radon research Program. One involved an analysis of the research house data, grouping the hourly house [sup 222]Rn measurements into 2 day, 7 day and 90 day intervals to simulate the response of passive monitors. Another area requiring some attention resulted in a publication of 3 years of our indoor/outdoor measurements in a high-rise apartment. Little interest has been evinced in apartment measurements yet 20% of the US population lives in multiple-family dwellings, not in contact with the ground. These data together with a summary of all other published data on apartments showed that apartments have only about 50% greater [sup 222]Rn concentration than the measured outdoor [sup 222]Rn. Apartment dwellers generally represent a low risk group regarding [sup 222]Rn exposure. The following sections describe the main projects in some detail.

Harley, N.H.

1992-01-01T23:59:59.000Z

375

Continuum Power Spectrum Components in X-Ray Sources: Detailed Modelling and Search for Coherent Periodicities  

E-Print Network (OSTI)

This paper summarises two recently developed techniques in power spectral analysis and their application to a sample of X-ray light curves of accreting collapsed objects in active galactic nuclei and X-ray binaries. The first technique is designed to carry out detailed model fitting of continuum power spectrum components arising from noise variability by using maximum likelihood methods. The technique is applied to the light curves of a number of highly variable AGNs observed with EXOSAT. Substantially steeper logarithmic power spectrum slopes are obtained than previously estimated with standard methods. The second technique was devised in order to reveal coherent periodicities in the presence of ``coloured" (i.e. non--white) noise variability components from the source. To this aim the power spectra are searched for significant narrow peaks superposed on the ``coloured" continuum components. We present the results of a search for an orbital modulation in the light curves of a sample of 25 low mass X--ray binaries (LMXRBs), for which the orbital period is either unknown or detected only at optical wavelengths. This led to the discovery of a significant X--ray orbital modulation at the few percent level in the burster MXB1636-539.

L. Stella; E. Arlandi; G. Tagliaferri; G. L. Israel

1994-11-13T23:59:59.000Z

376

Regional load-curve models. Volume 5. Data base. Final report  

SciTech Connect

In preparing to build the models detailed in the first four volumes of the EA-1672 reports, a substantial data gathering, clean-up, and organizing effort was conducted. This volume describes that process and documents the data banks sent to EPRI. Three types of data concepts were needed to explore hourly load forecasting: hourly load, hourly weather and related socioeconomic data concepts. These materials were gathered for the project. EPRI has 32 data tapes that include hourly load and weather data for 32 regions for the period 1962 to 1977. Two other data banks, EPRIDATAA and EPRIDATAM, contain annual and monthly data respectively, gathered for use in this project. Hourly load forecasts out to the year 2000 have also been received by EPRI. DRI's forecasts are contained in the data bank FORECASTBANK. QUERI's forecasts are also available. These data series may prove useful to other researchers exploring related topics.

Platt, H.D.

1984-04-01T23:59:59.000Z

377

Dynamic modeling and control of hybrid ground source heat pump systems.  

E-Print Network (OSTI)

??Ground source heat pump (GSHP) systems are one of the fastest growing applications of renewable energy in the world with annual increases of 10% over… (more)

Chen, Chang

2008-01-01T23:59:59.000Z

378

Mechanistic Model Simulations of the East African Climate Using NCAR Regional Climate Model: Influence of Large-Scale Orography on the Turkana Low-Level Jet  

Science Conference Proceedings (OSTI)

The National Center for Atmospheric Research regional climate model (RegCM) is employed to study the dynamics of the Turkana low-level jet that lies between the Ethiopian and the East African highlands, and also investigate the mechanisms ...

Matayo Indeje; Fredrick H. M. Semazzi; Lian Xie; Laban J. Ogallo

2001-06-01T23:59:59.000Z

379

Source Characterization with a Genetic Algorithm–Coupled Dispersion–Backward Model Incorporating SCIPUFF  

Science Conference Proceedings (OSTI)

This paper extends the approach of coupling a forward-looking dispersion model with a backward model using a genetic algorithm (GA) by incorporating a more sophisticated dispersion model [the Second-Order Closure Integrated Puff (SCIPUFF) model] ...

Christopher T. Allen; Sue Ellen Haupt; George S. Young

2007-03-01T23:59:59.000Z

380

ANN and ANFIS models for performance evaluation of a vertical ground source heat pump system  

Science Conference Proceedings (OSTI)

The aim of this study is to demonstrate the comparison of an artificial neural network (ANN) and an adaptive neuro-fuzzy inference system (ANFIS) for the prediction performance of a vertical ground source heat pump (VGSHP) system. The VGSHP system using ... Keywords: Adaptive neuro-fuzzy inference system, Coefficient of performance, Ground source heat pump, Membership functions, Vertical heat exchanger

Hikmet Esen; Mustafa Inalli

2010-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Regional Climate Model Simulation of U.S. Precipitation during 1982–2002. Part I: Annual Cycle  

Science Conference Proceedings (OSTI)

The fifth-generation PSU–NCAR Mesoscale Model (MM5)-based regional climate model (CMM5) capability in simulating the U.S. precipitation annual cycle is evaluated with a 1982–2002 continuous baseline integration driven by the NCEP–DOE second ...

Xin-Zhong Liang; Li Li; Kenneth E. Kunkel; Mingfang Ting; Julian X. L. Wang

2004-09-01T23:59:59.000Z

382

Development of a Regional Climate Model for U.S. Midwest Applications. Part I: Sensitivity to Buffer Zone Treatment  

Science Conference Proceedings (OSTI)

A regional climate model (RCM) is being developed for U.S. Midwest applications on the basis of the newly released Pennsylvania State University–NCAR Fifth-Generation Mesoscale Model (MM5), version 3.3. This study determines the optimal RCM ...

Xin-Zhong Liang; Kenneth E. Kunkel; Arthur N. Samel

2001-12-01T23:59:59.000Z

383

Evaluation of Greenland Ice Sheet Surface Climate in the HIRHAM Regional Climate Model Using Automatic Weather Station Data  

Science Conference Proceedings (OSTI)

The 1998 annual cycle and 1991–98 summer simulations of Greenland ice sheet surface climate are made with the 0.5°-horizontal resolution HIRHAM regional climate model of the Arctic. The model output is compared with meteorological and energy ...

Jason E. Box; Annette Rinke

2003-05-01T23:59:59.000Z

384

Improved interval estimation of long run response from a dynamic linear model: A highest density region approach  

Science Conference Proceedings (OSTI)

This paper proposes a new method of interval estimation for the long run response (or elasticity) parameter from a general linear dynamic model. We employ the bias-corrected bootstrap, in which small sample biases associated with the parameter estimators ... Keywords: ARDL model, Bias-correction, Bootstrapping, Highest density region, Long run elasticity

Jae H. Kim; Iain Fraser; Rob J. Hyndman

2011-08-01T23:59:59.000Z

385

Anthropogenic Aerosol Radiative Forcing in Asia Derived From Regional Models With Atmospheric and Aerosol Data Assimilation  

DOE Green Energy (OSTI)

A high-resolution estimate of monthly 3D aerosol solar heating rates and surface solar fluxes in Asia from 2001 to 2004 is described here. This product stems from an Asian aerosol assimilation project, in which a) the PNNL regional model bounded by the NCEP reanalyses was used to provide meteorology, b) MODIS and AERONET data were integrated for aerosol observations, c) the Iowa aerosol/chemistry model STEM-2K1 used the PNNL meteorology and assimilated aerosol observations, and d) 3D (X-Y-Z) aerosol simulations from the STEM-2K1 were used in the Scripps Monte-Carlo Aerosol Cloud Radiation (MACR) model to produce total and anthropogenic aerosol direct solar forcing for average cloudy skies. The MACR model and STEM both used the PNNL model resolution of 0.45º×0.4º in the horizontal and of 23 layers in the troposphere. The 2001–2004 averaged anthropogenic all-sky aerosol forcing is ?1.3 Wm-2 (TOA), +7.3 Wm-2 (atmosphere) and ?8.6 Wm-2 (surface) averaged in Asia (60?138°E & Eq. ?45°N). In the absence of AERONET SSA assimilation, absorbing aerosol concentration (especially BC aerosol) is much smaller, giving ?2.3 Wm-2 (TOA), +4.5 Wm-2 (atmosphere) and ?6.8 Wm-2 (surface), averaged in Asia. In the vertical, monthly forcing is mainly concentrated below 600hPa with maxima around 800hPa. Seasonally, low-level forcing is far larger in dry season than in wet season in South Asia, whereas the wet season forcing exceeds the dry season forcing in East Asia. The anthropogenic forcing in the present study is similar to that in Chung et al.’s [2005] in overall magnitude but the former offers fine-scale features and simulated vertical profiles. The interannual variability of the computed anthropogenic forcing is significant and extremely large over major emission outflow areas. In view of this, the present study’s estimate is within the implicated range of the 1999 INDOEX result. However, NCAR/CCSM3’s anthropogenic aerosol forcing is much smaller than the present study’s estimate at the surface, and is outside of what the INDOEX findings can support.

Chung, Chul Eddy; Ramanathan, V.; Carmichael, Gregory; Kulkarni, S.; Tang, Youhua; Adhikary, Bhupesh; Leung, Lai-Yung R.; Qian, Yun

2010-07-05T23:59:59.000Z

386

Scale-Selective Bias Correction in a Downscaling of Global Analysis Using a Regional Model  

Science Conference Proceedings (OSTI)

Systematic large-scale errors are often found within the regional domain in the regional dynamical downscaling procedure. This paper proposes a method to suppress such errors using a combination of spectral tendency damping and area average ...

Hideki Kanamaru; Masao Kanamitsu

2007-02-01T23:59:59.000Z

387

Modeled and observed ozone sensitivity to mobile-source emissions in Mexico City  

E-Print Network (OSTI)

The emission characteristics of mobile sources in the Mexico City Metropolitan Area (MCMA) have changed significantly over the past few decades in response to emission control policies, advancements in vehicle technologies ...

Zavala, M.

388

Dynamical mass generation by source inversion: calculating the mass gap of the chiral Gross-Neveu model  

E-Print Network (OSTI)

We probe the U(N) chiral Gross-Neveu model with a source-term $J\\l{\\Psi}\\Psi$. We find an expression for the renormalization scheme and scale invariant source $\\hat{J}$, as a function of the generated mass gap. The expansion of this function is organized in such a way that all scheme and scale dependence is reduced to one single parameter $d$. We obtain a non-perturbative mass gap as the solution of $\\hat{J}=0$. A physical choice for $d$ gives good results for $N>2$. The self-consistent minimal sensitivity condition gives a slight improvement.

K. Van Acoleyen; J. A. Gracey; H. Verschelde

2002-02-27T23:59:59.000Z

389

NUMERICAL MODELING OF THE INITIATION OF CORONAL MASS EJECTIONS IN ACTIVE REGION NOAA 9415  

SciTech Connect

Coronal mass ejections (CMEs) and solar flares are the main drivers of weather in space. Understanding how these events occur and what conditions might lead to eruptive events is of crucial importance for up to date and reliable space weather forecasting. The aim of this paper is to present a numerical magnetohydrodynamic (MHD) data-inspired model suitable for the simulation of the CME initiation and their early evolution. Starting from a potential magnetic field extrapolation of the active region (AR) NOAA 9415, we solve the full set of ideal MHD equations in a non-zero plasma-{beta} environment. As a consequence of the applied twisting motions, a force-free-magnetic field configuration is obtained, which has the same chirality as the investigated AR. We investigate the response of the solar corona when photospheric motions resembling the ones observed for AR 9415 are applied at the inner boundary. As a response to the converging shearing motions, a flux rope is formed that quickly propagates outward, carrying away the plasma confined inside the flux rope against the gravitational attraction by the Sun. Moreover, a compressed leading edge propagating at a speed of about 550 km s{sup -1} and preceding the CME is formed. The presented simulation shows that both the initial magnetic field configuration and the plasma-magnetic-field interaction are relevant for a more comprehensive understanding of the CME initiation and early evolution phenomenon.

Zuccarello, F. P.; Poedts, S. [Centre for Mathematical Plasma-Astrophysics, KU Leuven, Celestijnenlaan 200B, B-3001 Leuven (Belgium); Meliani, Z., E-mail: Francesco.Zuccarello@wis.kuleuven.be, E-mail: Stefaan.Poedts@wis.kuleuven.be, E-mail: zakaria.meliani@obspm.fr [Observatoire de Paris, LUTh, F-92190 Meudon (France)

2012-10-20T23:59:59.000Z

390

A Numerical Modeling Study of the Upwelling Source Waters along the Oregon Coast during 2005  

Science Conference Proceedings (OSTI)

Regional ocean circulation along the Oregon coast is studied numerically for forcing fields derived from year 2005 and climatological-mean conditions. The primary object is to study directly the Lagrangian pathways by which fluid arrives in the ...

David Rivas; R. M. Samelson

2011-01-01T23:59:59.000Z

391

REGIONAL ASSESSMENT PROGRAM MASTER Regional Issue Identification  

NLE Websites -- All DOE Office Websites (Extended Search)

from these Federal Region totals. Energy sources addressed were coal, nuclear, oil, oil shale, gas, geothermal, . - - - hydroelectric and solar. Six of the national laboratories,...

392

Assessment of the radon concentrations in air caused by emissions from multiple sources in a uranium mining and milling region. A case study of the Ambrosia Lake region of New Mexico  

SciTech Connect

The Ambrosia Lake uranium mining and milling operations were selected to characterize the relative importance of these sources on ambient atmospheric radon concentrations. All uranium mines at Ambrosia Lake are underground. The comparisons of interest were both between the sources and between the sources and background concentrations. The results show that vents are by far the greatest source of the computed radon concentrations in the immediate area of the operations. The computed radon concentrations at receptor points were largely influenced by the closer sources, rather than by more distant stronger sources. The area where computed radon concentrations significantly exceed the background is confined to the general area around the vents and mills. A comparison between computed radon concentrations and monitoring data at selected points demonstrates order of magnitude agreement.

Droppo, J.G.; Glissmeyer, J.A.

1981-12-01T23:59:59.000Z

393

The Impact of Land Surface Processes on Simulations of the U.S. Hydrological Cycle: A Case Study of the 1993 Flood Using the SSiB Land Surface Model in the NCEP Eta Regional Model  

Science Conference Proceedings (OSTI)

This paper describes a methodology for coupling the Simplified Simple Biosphere Model (SSiB) to the regional Eta Model of the National Centers for Environmental Prediction (NCEP), and presents the application of the coupled system in regional ...

Y. Xue; F. J. Zeng; K. E. Mitchell; Z. Janjic; E. Rogers

2001-12-01T23:59:59.000Z

394

AERMOD: A Dispersion Model for Industrial Source Applications. Part I: General Model Formulation and Boundary Layer Characterization  

Science Conference Proceedings (OSTI)

The formulation of the American Meteorological Society (AMS) and U.S. Environmental Protection Agency (EPA) Regulatory Model (AERMOD) Improvement Committee’s applied air dispersion model is described. This is the first of two articles describing ...

Alan J. Cimorelli; Steven G. Perry; Akula Venkatram; Jeffrey C. Weil; Robert?J. Paine; Robert B. Wilson; Russell F. Lee; Warren D. Peters; Roger W. Brode

2005-05-01T23:59:59.000Z

395

AERMOD: A Dispersion Model for Industrial Source Applications. Part II: Model Performance against 17 Field Study Databases  

Science Conference Proceedings (OSTI)

The performance of the American Meteorological Society (AMS) and U.S. Environmental Protection Agency (EPA) Regulatory Model (AERMOD) Improvement Committee’s applied air dispersion model against 17 field study databases is described. AERMOD is a ...

Steven G. Perry; Alan J. Cimorelli; Robert J. Paine; Roger W. Brode; Jeffrey C. Weil; Akula Venkatram; Robert B. Wilson; Russell F. Lee; Warren D. Peters

2005-05-01T23:59:59.000Z

396

Modeling Ambient Carbon Monoxide Trends to Evaluate Mobile Source Emissions Reductions  

Science Conference Proceedings (OSTI)

Regression models have been used with poor success to detect the effect of emission control programs in ambient concentration measurements of carbon monoxide. An advanced CO regression model is developed whose form is based on an understanding of ...

Robin L. Dennis; Mary W. Downton

1987-10-01T23:59:59.000Z

397

Source of Seasonality and Scale Dependence of Predictability in a Coupled Ocean–Atmosphere Model  

Science Conference Proceedings (OSTI)

The seasonality of predictability of ENSO (related to the so-called spring predictability barrier) is investigated using the Cane–Zebiak coupled model. Observed winds are used to force the ocean component of the model to generate analyzed initial ...

B. N. Goswami; K. Rajendran; D. Sengupta

1997-05-01T23:59:59.000Z

398

A CRITICAL ASSESSMENT OF NONLINEAR FORCE-FREE FIELD MODELING OF THE SOLAR CORONA FOR ACTIVE REGION 10953  

Science Conference Proceedings (OSTI)

Nonlinear force-free field (NLFFF) models are thought to be viable tools for investigating the structure, dynamics, and evolution of the coronae of solar active regions. In a series of NLFFF modeling studies, we have found that NLFFF models are successful in application to analytic test cases, and relatively successful when applied to numerically constructed Sun-like test cases, but they are less successful in application to real solar data. Different NLFFF models have been found to have markedly different field line configurations and to provide widely varying estimates of the magnetic free energy in the coronal volume, when applied to solar data. NLFFF models require consistent, force-free vector magnetic boundary data. However, vector magnetogram observations sampling the photosphere, which is dynamic and contains significant Lorentz and buoyancy forces, do not satisfy this requirement, thus creating several major problems for force-free coronal modeling efforts. In this paper, we discuss NLFFF modeling of NOAA Active Region 10953 using Hinode/SOT-SP, Hinode/XRT, STEREO/SECCHI-EUVI, and SOHO/MDI observations, and in the process illustrate three such issues we judge to be critical to the success of NLFFF modeling: (1) vector magnetic field data covering larger areas are needed so that more electric currents associated with the full active regions of interest are measured, (2) the modeling algorithms need a way to accommodate the various uncertainties in the boundary data, and (3) a more realistic physical model is needed to approximate the photosphere-to-corona interface in order to better transform the forced photospheric magnetograms into adequate approximations of nearly force-free fields at the base of the corona. We make recommendations for future modeling efforts to overcome these as yet unsolved problems.

DeRosa, Marc L.; Schrijver, Carolus J.; Aschwanden, Markus J.; Cheung, Mark C. M. [Lockheed Martin Solar and Astrophysics Laboratory, 3251 Hanover St. B/252, Palo Alto, CA 94304 (United States); Barnes, Graham; Leka, K. D. [North West Research Associates, Colorado Research Associates Division, 3380 Mitchell Ln., Boulder, CO 80301 (United States); Lites, Bruce W. [High Altitude Observatory, National Center for Atmospheric Research , P.O. Box 3000, Boulder, CO 80307 (United States); Amari, Tahar; Canou, Aurelien [CNRS, Centre de Physique Theorique de l'Ecole Polytechnique, 91128 Palaiseau Cedex (France); McTiernan, James M. [Space Sciences Laboratory, University of California at Berkeley, 7 Gauss Way, Berkeley, CA 94720 (United States); Regnier, Stephane [Mathematics Institute, University of St Andrews, St Andrews, Fife KY16 9SS (United Kingdom); Thalmann, Julia K.; Wiegelmann, Thomas; Inhester, Bernd; Tadesse, Tilaye [Max-Planck-Institut fuer Sonnensystemforschung, Max-Planck-Strasse 2, 37191 Katlenburg-Lindau (Germany); Valori, Gherardo [Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam (Germany); Wheatland, Michael S. [School of Physics, University of Sydney, Sydney, NSW 2006 (Australia); Conlon, Paul A. [Astrophysics Research Group, School of Physics, Trinity College Dublin, Dublin 2 (Ireland); Fuhrmann, Marcel [Institut fuer Physik, Universitaet Potsdam, Am Neuen Palais 10, 14469 Potsdam (Germany)

2009-05-10T23:59:59.000Z

399

The Relative Importance of Oxidation Pathways and Clouds to Atmospheric Ambient Sulfate Production as Predicted by the Regional Acid Deposition Model  

Science Conference Proceedings (OSTI)

The development and use of a version of the Regional Acid Deposition Model/Engineering Model (RADM/FM) called the Comprehensive Sulfate Tracking Model (COMSTM) is reported. The COMSTM is used to diagnose the relative contributions of each sulfate ...

John N. McHenry; Robin L. Dennis

1994-07-01T23:59:59.000Z

400

Measurement, Analysis and Modeling of real-time Source Data traffic in Factory Communication Systems  

E-Print Network (OSTI)

In the performance evaluation and design of communication systems for distributed automation systems the almost realistic modeling of the data traffic of automation devices plays a decisive part. Therefore the real-time communication behaviour of a high-grade automated installation in the discrete manufacturing is evaluated. Selected communication requirements are analysed and transferred to a analytic model. This model finally is validated.

Juergen Jasperneite; Peter Neumann

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Streamtube Fate and Transport Modeling of the Source Term for the Old Radioactive Waste  

SciTech Connect

The modeling described in this report is an extension of previous fate and transport modeling for the Old Radioactive Waste Burial Ground Corrective Measures Study/Feasibility Study. The purpose of this and the previous modeling is to provide quantitative input to the screening of remedial alternatives for the CMS/FS for this site.

Brewer, K.

2000-11-16T23:59:59.000Z

402

Allocating the Sources of Polycyclic Aromatic Hydrocarbons (PAHs) in Surficial Sediments from the Washington, DC Region with Particular Emphasis on Coal Tar Sealcoat .  

E-Print Network (OSTI)

??Various sources of polycyclic aromatic hydrocarbons (PAHs) were analyzed that potentially influenced contamination levels in sediments from the Anacostia River in Washington, DC and surrounding… (more)

Nadrchal, David

2013-01-01T23:59:59.000Z

403

ONE-DIMENSIONAL MODELING FOR TEMPERATURE-DEPENDENT UPFLOW IN THE DIMMING REGION OBSERVED BY HINODE/EUV IMAGING SPECTROMETER  

Science Conference Proceedings (OSTI)

We previously found a temperature-dependent upflow in the dimming region following a coronal mass ejection observed by the Hinode EUV Imaging Spectrometer (EIS). In this paper, we reanalyzed the observations along with previous work on this event and provided boundary conditions for modeling. We found that the intensity in the dimming region dramatically drops within 30 minutes from the flare onset, and the dimming region reaches the equilibrium stage after {approx}1 hr. The temperature-dependent upflows were observed during the equilibrium stage by EIS. The cross-sectional area of the flux tube in the dimming region does not appear to expand significantly. From the observational constraints, we reconstructed the temperature-dependent upflow by using a new method that considers the mass and momentum conservation law and demonstrated the height variation of plasma conditions in the dimming region. We found that a super-radial expansion of the cross-sectional area is required to satisfy the mass conservation and momentum equations. There is a steep temperature and velocity gradient of around 7 Mm from the solar surface. This result may suggest that the strong heating occurred above 7 Mm from the solar surface in the dimming region. We also showed that the ionization equilibrium assumption in the dimming region is violated, especially in the higher temperature range.

Imada, S.; Shimizu, T. [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara-shi, Kanagawa 252-5210 (Japan); Hara, H.; Watanabe, T. [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka-shi, Tokyo 181-8588 (Japan); Murakami, I. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292 (Japan); Harra, L. K. [UCL-Mullard Space Science Laboratory, Holmbury St Mary, Dorking, Surrey, RH5 6NT (United Kingdom); Zweibel, E. G. [Department of Astronomy, University of Wisconsin-Madison, 475 N Charter Street, Madison, WI 53706 (United States)

2011-12-10T23:59:59.000Z

404

An integrated modelling framework for simulating regional-scale actor responses to global change in the water domain  

Science Conference Proceedings (OSTI)

Within coupled hydrological simulation systems, taking socio-economic processes into account is still a challenging task. In particular, systems that aim at evaluating impacts of climatic change on large spatial and temporal scales cannot be based on ... Keywords: Actors, Climate change, Coupled simulation, Domestic water use, Framework technology, Integrated water resources management, Regional scale model, Social simulation, Water supply

R. Barthel; S. Janisch; N. Schwarz; A. Trifkovic; D. Nickel; C. Schulz; W. Mauser

2008-09-01T23:59:59.000Z

405

Numerical Prediction of the 10–11 June 1985 Squall Line with the Canadian Regional Finite-Element Model  

Science Conference Proceedings (OSTI)

In an effort to improve operational forecasts of mesoscale convective systems (MCSs), a mesoscale version of the operational Canadian Regional Finite-Element (RFE) Model with a grid size of 25 km is used to predict an intense MCS that occurred ...

Stéphane Bélair; Da-Lin Zhang; Jocelyn Mailhot

1994-06-01T23:59:59.000Z

406

Climate Change Impacts on Jordan River Flow: Downscaling Application from a Regional Climate Model  

Science Conference Proceedings (OSTI)

The integration of climate change projections into hydrological and other response models used for water resource planning and management is challenging given the varying spatial resolutions of the different models. In general, climate models are ...

Rana Samuels; Alon Rimmer; Andreas Hartmann; Simon Krichak; Pinhas Alpert

2010-08-01T23:59:59.000Z

407

Structural Time Series Models and Trend Detection in Global and Regional Temperature Series  

Science Conference Proceedings (OSTI)

A unified statistical approach to identify suitable structural time series models for annual mean temperature is proposed. This includes a generalized model that can represent all the commonly used structural time series models for trend ...

Xiaogu Zheng; Reid E. Basher

1999-08-01T23:59:59.000Z

408

An Analysis of the Adoption of Open Source Software by Local Public Administrations: Evidence from the Emilia-Romagna Region of Italy  

Science Conference Proceedings (OSTI)

The wide diffusion of open source software OSS is driving discussion among scholars on a set of issues, including its adoption by public administrations PA. Previous works discussed a few factors that drive the decision to adopt OSS and did not address ... Keywords: E-Government, Empirical Research, Online Public Services, Open Source Software, Public Administration

Francesco Rentocchini; Dimitri Tartari

2010-07-01T23:59:59.000Z

409

Downscaling and Bias Correcting a Cold Season Precipitation Climatology over Coastal Southern British Columbia Using the Regional Atmospheric Modeling System (RAMS)  

Science Conference Proceedings (OSTI)

Thirty years of the North American Regional Reanalysis (NARR) are dynamically downscaled to an 8-km grid spacing using the Regional Atmospheric Modeling System (RAMS) to generate a climatology of glacier winter accumulation over the southern ...

B. Ainslie; P. L. Jackson

2010-05-01T23:59:59.000Z

410

Mesoscale Atmospheric Modeling Using a High Horizontal Grid Resolution over a Complex Coastal Terrain and a Wine Region of South Africa  

Science Conference Proceedings (OSTI)

The Regional Atmospheric Modeling System (RAMS) was used to assess local air circulation patterns over the wine-producing Stellenbosch region of South Africa. Numerical simulations using four nested grids (25, 5, and 1 km, and 200 m of horizontal ...

V. Bonnardot; S. Cautenet

2009-02-01T23:59:59.000Z

411

Foundation heat exchangers for residential ground source heat pump systems Numerical modeling and experimental validation  

Science Conference Proceedings (OSTI)

A new type of ground heat exchanger that utilizes the excavation often made for basements or foundations has been proposed as an alternative to conventional ground heat exchangers. This article describes a numerical model that can be used to size these foundation heat exchanger (FHX) systems. The numerical model is a two-dimensional finite-volume model that considers a wide variety of factors, such as soil freezing and evapotranspiration. The FHX numerical model is validated with one year of experimental data collected at an experimental house located near Oak Ridge, Tennessee. The model shows good agreement with the experimental data-heat pump entering fluid temperatures typically within 1 C (1.8 F) - with minor discrepancies due to approximations, such as constant moisture content throughout the year, uniform evapotranspiration over the seasons, and lack of ground shading in the model.

Xing, Lu [Oklahoma State University; Cullin, James [Oklahoma State University; Spitler, Jeffery [Oklahoma State University; Im, Piljae [ORNL; Fisher, Daniel [Oklahoma State University

2011-01-01T23:59:59.000Z

412

Development, validation and verification of the Momentum Source Model for discrete rotor blades.  

E-Print Network (OSTI)

??In this research, a novel numerical technique for modeling the unsteady aerodynamics of rotorcraft flows has been developed. The aim of this research is to… (more)

Guntupalli, Kanchan

2011-01-01T23:59:59.000Z

413

A Spatially Distributed Model to Simulate Water, Energy, and Vegetation Dynamics Using Information from Regional Climate Models  

Science Conference Proceedings (OSTI)

Studies seeking to understand the impacts of climate variability and change on the hydrology of a region need to take into account the dynamics of vegetation and its interaction with the hydrologic and energy cycles. Yet, most of the hydrologic ...

M. P. Maneta; N. L. Silverman

2013-08-01T23:59:59.000Z

414

EchoSeed Model 6733 Iodine-125 brachytherapy source: Improved dosimetric characterization using the MCNP5 Monte Carlo code  

Science Conference Proceedings (OSTI)

This study primarily aimed to obtain the dosimetric characteristics of the Model 6733 {sup 125}I seed (EchoSeed) with improved precision and accuracy using a more up-to-date Monte-Carlo code and data (MCNP5) compared to previously published results, including an uncertainty analysis. Its secondary aim was to compare the results obtained using the MCNP5, MCNP4c2, and PTRAN codes for simulation of this low-energy photon-emitting source. The EchoSeed geometry and chemical compositions together with a published {sup 125}I spectrum were used to perform dosimetric characterization of this source as per the updated AAPM TG-43 protocol. These simulations were performed in liquid water material in order to obtain the clinically applicable dosimetric parameters for this source model. Dose rate constants in liquid water, derived from MCNP4c2 and MCNP5 simulations, were found to be 0.993 cGyh{sup -1} U{sup -1} ({+-}1.73%) and 0.965 cGyh{sup -1} U{sup -1} ({+-}1.68%), respectively. Overall, the MCNP5 derived radial dose and 2D anisotropy functions results were generally closer to the measured data (within {+-}4%) than MCNP4c and the published data for PTRAN code (Version 7.43), while the opposite was seen for dose rate constant. The generally improved MCNP5 Monte Carlo simulation may be attributed to a more recent and accurate cross-section library. However, some of the data points in the results obtained from the above-mentioned Monte Carlo codes showed no statistically significant differences. Derived dosimetric characteristics in liquid water are provided for clinical applications of this source model.

Mosleh-Shirazi, M. A.; Hadad, K.; Faghihi, R.; Baradaran-Ghahfarokhi, M.; Naghshnezhad, Z.; Meigooni, A. S. [Center for Research in Medical Physics and Biomedical Engineering and Physics Unit, Radiotherapy Department, Shiraz University of Medical Sciences, Shiraz 71936-13311 (Iran, Islamic Republic of); Radiation Research Center and Medical Radiation Department, School of Engineering, Shiraz University, Shiraz 71936-13311 (Iran, Islamic Republic of); Comprehensive Cancer Center of Nevada, Las Vegas, Nevada 89169 (United States)

2012-08-15T23:59:59.000Z

415

NEAR FIELD MODELING OF SPE1 EXPERIMENT AND PREDICTION OF THE SECOND SOURCE PHYSICS EXPERIMENTS (SPE2)  

SciTech Connect

Motion along joints and fractures in the rock has been proposed as one of the sources of near-source shear wave generation, and demonstrating the validity of this hypothesis is a focal scientific objective of the source physics experimental campaign in the Climax Stock granitic outcrop. A modeling effort has been undertaken by LLNL to complement the experimental campaign, and over the long term provide a validated computation capability for the nuclear explosion monitoring community. The approach involves performing the near-field nonlinear modeling with hydrodynamic codes (e.g., GEODYN, GEODYN-L), and the far-field seismic propagation with an elastic wave propagation code (e.g., WPP). the codes will be coupled together to provide a comprehensive source-to-sensor modeling capability. The technical approach involves pre-test predictions of each of the SPE experiments using their state of the art modeling capabilities, followed by code improvements to alleviate deficiencies identified in the pre-test predictions. This spiral development cycle wherein simulations are used to guide experimental design and the data from the experiment used to improve the models is the most effective approach to enable a transition from the descriptive phenomenological models in current use to the predictive, hybrid physics models needed for a science-based modeling capability for nuclear explosion monitoring. The objective of this report is to describe initial results of non-linear motion predictions of the first two SPE shots in the Climax Stock: a 220-lb shot at a depth of 180 ft (SPE No.1), and a 2570-lb shot at a depth of 150 ft (SPE No.2). The simulations were performed using the LLNL ensemble granite model, a model developed to match velocity and displacement attenuation from HARDHAT, PILE DRIVER, and SHOAL, as well as Russian and French nuclear test data in granitic rocks. This model represents the state of the art modeling capabilities as they existed when the SPE campaign was launched in 2010, and the simulation results presented here will establish a baseline that will be used for gauging progress as planned modeling improvements are implemented during the remainder of the SPE program. The initial simulations were performed under 2D axisymmetric conditions assuming the geologic medium to be a homogeneous half space. However, logging data obtained from the emplacement hole reveal two major faults that intersect the borehole at two different depth intervals (NSTec report, 2011) and four major joint sets. To evaluate the effect of these discrete structures on the wave forms generated they have performed 2D and 3D analysis with a Lagrangian hydrocode, GEODYN-L that shares the same material models with GEODYN but can explicitly take joints and fault into consideration. They discuss results obtained using these two different approaches in this report.

Antoun, T; Xu, H; Vorobiev, O; Lomov, I

2011-10-20T23:59:59.000Z

416

Inverse Modeling of the Action-Balance Equation. Part I: Source Expansion and Adjoint-Model Equations  

Science Conference Proceedings (OSTI)

In this paper a series of numerical experiments is defined to explore the inverse modeling of the action-balance equation governing the evolution of the surface gravity wave field, using the adjoint data-assimation model-optimization procedure of ...

R. L. Snyder; L. M. Lawson; R. B. Long

1992-12-01T23:59:59.000Z

417

Development of Regional Models that Use Meteorological Variables for Predicting Stripe Rust Disease on Winter Wheat  

Science Conference Proceedings (OSTI)

Meteorological variables can be used to predict stripe rust, a disease of wheat caused by Puccinia striiformis West., at Lind, Pullman, and Walla Walla, Washington and Pendleton, Oregon in the Pacific Northwest of the United States. Regional ...

Stella Melugin Coakley; William S. Boyd; Roland F. Line

1984-08-01T23:59:59.000Z

418

New Theoretical Model of the Complex Edge Region of Fusion Plasmas...  

Office of Science (SC) Website

a high pedestal is required for copious fusion energy production in ITER or a fusion power plant, and (2) the large free energy in the pedestal region can drive instabilities...

419

Renewable Resources: a national catalog of model projects. Volume 3. Southern Solar Energy Center Region  

DOE Green Energy (OSTI)

This compilation of diverse conservation and renewable energy projects across the United States was prepared through the enthusiastic participation of solar and alternate energy groups from every state and region. Compiled and edited by the Center for Renewable Resources, these projects reflect many levels of innovation and technical expertise. In many cases, a critique analysis is presented of how projects performed and of the institutional conditions associated with their success or failure. Some 2000 projects are included in this compilation; most have worked, some have not. Information about all is presented to aid learning from these experiences. The four volumes in this set are arranged in state sections by geographic region, coinciding with the four Regional Solar Energy Centers. The table of contents is organized by project category so that maximum cross-referencing may be obtained. This volume includes information on the Southern Solar Energy Center Region. (WHK)

None

1980-07-01T23:59:59.000Z

420

Renewable Resources: a national catalog of model projects. Volume 4. Western Solar Utilization Network Region  

DOE Green Energy (OSTI)

This compilation of diverse conservation and renewable energy projects across the United States was prepared through the enthusiastic participation of solar and alternate energy groups from every state and region. Compiled and edited by the Center for Renewable Resources, these projects reflect many levels of innovation and technical expertise. In many cases, a critique analysis is presented of how projects performed and of the institutional conditions associated with their success or failure. Some 2000 projects are included in this compilation; most have worked, some have not. Information about all is presented to aid learning from these experiences. The four volumes in this set are arranged in state sections by geographic region, coinciding with the four Regional Solar Energy Centers. The table of contents is organized by project category so that maximum cross-referencing may be obtained. This volume includes information on the Western Solar Utilization Network Region. (WHK)

None

1980-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Renewable Resources: a national catalog of model projects. Volume 1. Northeast Solar Energy Center Region  

DOE Green Energy (OSTI)

This compilation of diverse conservation and renewable energy projects across the United States was prepared through the enthusiastic participation of solar and alternate energy groups from every state and region. Compiled and edited by the Center for Renewable Resources, these projects reflect many levels of innovation and technical expertise. In many cases, a critique analysis is presented of how projects performed and of the institutional conditions associated with their success or failure. Some 2000 projects are included in this compilation; most have worked, some have not. Information about all is presented to aid learning from these experiences. The four volumes in this set are arranged in state sections by geographic region, coinciding with the four Regional Solar Energy Centers. The table of contents is organized by project category so that maximum cross-referencing may be obtained. This volume includes information on the Northeast Solar Energy Center Region. (WHK).

None

1980-07-01T23:59:59.000Z

422

Implementation of an E–? Parameterization of Vertical Subgrid-Scale Mixing in a Regional Model  

Science Conference Proceedings (OSTI)

An E–? parameterization of subgrid-scale vertical turbulent mixing has been installed in NORAPS (Navy operational Regional Atmospheric Prediction System). The 1.5-order parameterization uses full prognostic equations for turbulence kinetic energy ...

Rolf H. Langland; Chi-Sann Liou

1996-05-01T23:59:59.000Z

423

Modeling of Regional Hydroclimate Change over the Indian Subcontinent: Impact of the Expanding Thar Desert  

Science Conference Proceedings (OSTI)

The Thar Desert between northwestern India and Pakistan is the most densely populated desert region in the world, and the vast surrounding areas are affected by rapid soil degradation and vegetation loss. The impact of an expanded desert (...

Massimo Bollasina; Sumant Nigam

2011-06-01T23:59:59.000Z

424

Advances in Predicting Continental Low Stratus with a Regional NWP Model  

Science Conference Proceedings (OSTI)

In the eastern Alpine region, subinversion cloudiness associated with elevated temperature inversions is a frequent phenomenon in autumn and winter, which often persists for several days. Although the prediction of fog and low stratus by ...

Alexander Kann; Harald Seidl; Christoph Wittmann; Thomas Haiden

2010-02-01T23:59:59.000Z

425

A Variable-Resolution Stretched-Grid General Circulation Model: Regional Climate Simulation  

Science Conference Proceedings (OSTI)

The development of and results obtained with a variable-resolution stretched-grid GCM for the regional climate simulation mode are presented. A global variable-resolution stretched grid used in the study has enhanced horizontal resolution over ...

Michael S. Fox-Rabinovitz; Lawrence L. Takacs; Ravi C. Govindaraju; Max J. Suarez

2001-03-01T23:59:59.000Z

426

Towards Assessing NARCCAP Regional Climate Model Credibility for the North American Monsoon: Current Climate Simulations  

Science Conference Proceedings (OSTI)

We examine 17 dynamically downscaled simulations produced as part of the North American Regional Climate Change Assessment Program (NARCCAP) for their skill in reproducing the North American Monsoon system. We focus on precipitation and the ...

Melissa S. Bukovsky; David J. Gochis; Linda O. Mearns

427

Observations and Numerical Model Simulations of the Atmospheric Boundary Layer in the Santa Barbara Coastal Region  

Science Conference Proceedings (OSTI)

Observations of boundary-layer flow within the Santa Barbara region taken on 20 September 1985 revel the presence of a wide variety of flow features, including mesoscale wind vortices sea/land breezes, and thermally driven upslope/downslope ...

J. M. Wilczak; W. F. Dabberdt; R. A. Kropfli

1991-05-01T23:59:59.000Z

428

Region-based model of tour planning applied to interactive tour generation  

Science Conference Proceedings (OSTI)

The paper addresses a tour planning problem, which encompasses weakly specified constraints such as different kinds of activities together with corresponding spatial assignments such as locations and regions. Alternative temporal orders of planed activities ...

Inessa Seifert

2007-07-01T23:59:59.000Z

429

What Are the Sources of Mechanical Damping in Matsuno–Gill-Type Models?  

Science Conference Proceedings (OSTI)

The Matsuno–Gill model has been widely used to study the tropical large-scale circulations and atmosphere–ocean interactions. However, a common critique of this model is that it requires a strong equivalent linear mechanical damping to get ...

Jia-Lin Lin; Brian E. Mapes; Weiqing Han

2008-01-01T23:59:59.000Z

430

Preliminary evaluation of techniques for transforming regional climate model output to the potential repository site in support of Yucca Mountain future climate synthesis  

SciTech Connect

The report describes a preliminary evaluation of models for transforming regional climate model output from a regional to a local scale for the Yucca Mountain area. Evaluation and analysis of both empirical and numerical modeling are discussed which is aimed at providing site-specific, climate-based information for use by interfacing activities. Two semiempirical approaches are recommended for further analysis.

Church, H.W.; Zak, B.D.; Behl, Y.K.

1995-06-01T23:59:59.000Z

431

Finite source modelling of magmatic unrest in Socorro, New Mexico, and Long Valley, California  

E-Print Network (OSTI)

of the magma storage region beneath the Long Valley caldera. 2 D E F O R M A T I O N I N S O C O R R O , N M 2 1 and 2) suggests that shallow man-induced processes (such as water pumping) may be suspected cause of the observed subsidence because water pumping in the Belen area did not appreciably affect

Fialko, Yuri

432

Radon source apportionment in the home, dosimetry and risk modeling. Final report, 1993--1997  

SciTech Connect

This research covered the following 3 topics in 4 years: (1) the source apportionment of {sup 222}Rn in the home; (2) the internal bronchial dosimetry of inhaled {sup 222}Rn decay products; and (3) the lung cancer risk from inhalation of the short lived decay products of {sup 222}Rn. A 4th year of support was appended to this grant with a switch in research effort to determine a method for long term measurement of the particle size distribution of the short lived decay products in homes.

Harley, N.H.

1998-08-04T23:59:59.000Z

433

Open source model for generating RR intervals in atrial fibrillation and beyond  

E-Print Network (OSTI)

Abstract Background Realistic modeling of cardiac inter-beat (RR) intervals is highly desirable for basic research in cardiac electrophysiology, clinical management of heart diseases, and developing signal processing tools ...

Lian, Jie

434

CTDMPLUS: A Dispersion Model for Sources near Complex Topography. Part II: Performance Characteristics  

Science Conference Proceedings (OSTI)

The Complex Terrain Dispersion Model (CTDMPLUS), described in Part I of this paper, was evaluated using the SO2 field-study data from the Lovett generating station in southeastern New York state. For perspective, CTDMPLUS estimates were also ...

James O. Paumier; Donna J. Burns; Steven G. Perry

1992-07-01T23:59:59.000Z

435

Sources of the Equatorial Undercurrent in the Atlantic in a High-Resolution Ocean Model  

Science Conference Proceedings (OSTI)

The ventilation of the Equatorial Undercurrent (EUC) in the Atlantic is investigated using data from a high-resolution ocean model. Overturning streamfunctions, subduction patterns, and pathways are determined from Eulerian and Lagrangian mean ...

Wilco Hazeleger; Pedro de Vries; Yann Friocourt

2003-04-01T23:59:59.000Z

436

A Regional Model Simulation of the 1991 Severe Precipitation Event over the Yangtze–Huai River Valley. Part II: Model Bias  

Science Conference Proceedings (OSTI)

This is the second part of a study investigating the 1991 severe precipitation event over the Yangtze–Huai River valley (YHRV) in China using both observations and regional model simulations. While Part I reported on the Mei-yu front and its ...

Wei Gong; Wei-Chyung Wang

2000-01-01T23:59:59.000Z

437

Using a Soil Hydrology Model to Obtain Regionally Averaged Soil Moisture Values  

Science Conference Proceedings (OSTI)

The Soil Hydrology Model (SHM) was modified, and daily simulations of soil volumetric water content were made at 38 Oklahoma Mesonet sites for July 1997. These model results were compared with soil moisture observations made at the mesonet sites ...

Todd M. Crawford; David J. Stensrud; Toby N. Carlson; William J. Capehart

2000-08-01T23:59:59.000Z

438

Regional Climates in the GISS Global Circulation Model: Synoptic-Scale Circulation  

Science Conference Proceedings (OSTI)

Model simulations of global climate change are seen as an essential component of any program at understanding human impact on the global environment. A major weakness of current general circulation models (GCMs), however, is their perceived ...

B. Hewitson; R. G. Crane

1992-09-01T23:59:59.000Z

439

Elevated Mixed Layers in the Regional Severe Storm Environment: Conceptual Model and Case Studies  

Science Conference Proceedings (OSTI)

A conceptual model of the evolution of the severe local storm environment is discussed in conjunction with three case studies drawn from data obtained during the 1979 SESAME field program. The conceptual model describes how a particular ...

T. N. Carlson; S. G. Benjamin; G. S. Forbes; Y-F. Li

1983-07-01T23:59:59.000Z

440

Ability of a Regional-Scale Model to Predict the Genesis of Intense Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This paper presents the mesoscale part of a two-part evaluation of thirty forecasts produced by a mesoscalenumerical weather prediction model (MASS 2.0). The general approach taken to evaluate the mesoscale predictivecapabilities of the model is ...

Steven E. Koch

1985-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "model regions source" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

A Parameterization of Heterogeneous Land Surfaces for Atmospheric Numerical Models and Its Impact on Regional Meteorology  

Science Conference Proceedings (OSTI)

Natural land surfaces are usually heterogeneous over the resolvable scales considered in atmospheric numerical models. Therefore, model surface parameterizations that assume surface homogeneity may fail to represent the surface forcing ...

R. Avissar; R. A. Pielke

1989-10-01T23:59:59.000Z

442

Toward the Use of Coupled Atmospheric and Hydrologic Models at Regional Scale  

Science Conference Proceedings (OSTI)

The purpose of this study is to present the possibilities offered by coupled atmospheric and hydrologic models as a new tool to validate and interpret results produced by atmospheric models. The advantages offered by streamflow observations are ...

Robert Benoit; Pierre Pellerin; Nick Kouwen; Harold Ritchie; Norman Donaldson; Paul Joe; E. D. Soulis

2000-06-01T23:59:59.000Z

443

Impacts of Land Surface Model Complexity on a Regional Simulation of a Tropical Synoptic Event  

Science Conference Proceedings (OSTI)

A multimode Chameleon Surface Model (CHASM) with different levels of complexity in parameterizing surface energy balance is coupled to a limited-area model (DARLAM) to investigate the impacts of complexity in land surface representations on the ...

H. Zhang; J. L. McGregor; A. Henderson-Sellers; J. J. Katzfey

2004-02-01T23:59:59.000Z

444

Initialization of Soil-Water Content in Regional-Scale Atmospheric Prediction Models  

Science Conference Proceedings (OSTI)

The purpose of this study is to demonstrate the feasibility of determining the soil-water content fields required as initial conditions for land surface components within atmospheric prediction models. This is done using a model of the hydrologic ...

Christopher B. Smith; Mercedes N. Lakhtakia; William J. Capehart; Toby N. Carlson

1994-04-01T23:59:59.000Z

445

Surface Energy Balances of Three General Circulation Models: Implications for Simulating Regional Climate Change  

Science Conference Proceedings (OSTI)

We examine surface energy balances simulated by three general circulation models for current climatic boundary conditions and for an atmosphere with twice current levels of CO2. Differences between model simulations provide a measure of ...

William J. Gutowski Jr.; David S. Gutzler; Wei-Chyung Wang

1991-02-01T23:59:59.000Z

446

Effect of Atlantic Meridional Overturning Circulation on Tropical Atlantic Variability: A Regional Coupled Model Study  

Science Conference Proceedings (OSTI)

A simplified coupled ocean–atmosphere model, where an atmospheric general circulation model (AGCM) is fully coupled to a 2½-layer reduced-gravity ocean model (RGO) over the tropical Atlantic basin, is presented in the context of studying the role ...

Caihong Wen; Ping Chang; Ramalingam Saravanan

2011-07-01T23:59:59.000Z

447

Global and regional aspects of tropical cyclone activity in the CMIP5 models  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) activity is analyzed in 14 Coupled Model Intercomparison Project phase 5 (CMIP5) models. The global TC activity in the historical runs is compared with observations. The simulation of TC activity in the CMIP5 models is not as ...

Suzana J. Camargo

448

Comparison of Regional Clear-Sky Albedos Inferred from Satellite Observations and Model Computations  

Science Conference Proceedings (OSTI)

We have taken an important first step in validating climate models by comparing model and satellite inferred clear sky TOA (top-of-atmosphere) albedos. Model albodos were computed on a 1° × 1° latitude-longitude grid, allowing for variations in ...

B. P. Briegleb; P. Minnis; V. Ramanathan; E. Harrison

1986-02-01T23:59:59.000Z

449

Studies of regional-scale climate variability and change: Hidden Markov models and coupled ocean-atmosphere modes  

SciTech Connect

In this project we developed further a twin approach to the study of regional-scale climate variability and change. The two approaches involved probabilistic network (PN) models (sometimes called dynamic Bayesian networks) and intermediate-complexity coupled ocean-atmosphere models (ICMs). We thus made progress in identifying the predictable modes of climate variability and investigating their impacts on the regional scale. In previous work sponsored by DOE�s Climate Change Prediction Program (CCPP), we had developed a family of PNs (similar to Hidden Markov Models) to simulate historical records of daily rainfall, and used them to downscale seasonal predictions of general circulation models (GCMs). Using an idealized atmospheric model, we had established a novel mechanism through which ocean-induced sea-surface temperature (SST) anomalies might in�uence large-scale atmospheric circulation patterns on interannual and longer time scales; similar patterns were found in a hybrid coupled ocean�atmosphere�sea-ice model. In this continuation project, we built on these ICM results and PN model development to address prediction of rainfall and temperature statistics at the local scale, associated with global climate variability and change, and to investigate the impact of the latter on coupled ocean�atmosphere modes. Our main project results consist of extensive further development of the hidden Markov models for rainfall simulation and downscaling together with the development of associated software; new intermediate coupled models; a new methodology of inverse modeling for linking ICMs with observations and GCM simulations, called empirical mode reduction (EMR); and observational studies of decadal and multi-decadal natural climate variability, informed by ICM simulations. A particularly timely by-product of this work is an extensive study of clustering of cyclone tracks in the extratropical Atlantic and the western Tropical Pacific, with potential applications to predicting landfall.

M. Ghil (UCLA), PI; S. Kravtsov (UWM); A. W. Robertson (IRI); P. Smyth (UCI)

2008-10-14T23:59:59.000Z

450

Impact of natural and anthropogenic aerosols on stratocumulus and precipitation in the Southeast Pacific: A regional modeling study using WRF-Chem  

Science Conference Proceedings (OSTI)

Cloud-system resolving simulations with the chemistry version of the Weather Research and Forecasting (WRF-Chem) model are used to quantify the impacts of regional anthropogenic and oceanic emissions on changes in aerosol properties, cloud macro- and microphysics, and cloud radiative forcing over the Southeast Pacific (SEP) during the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) (15 Oct–Nov 16, 2008). The effects of oceanic aerosols on cloud properties, precipitation, and the shortwave forcing counteract those of anthropogenic aerosols. Despite the relatively small changes in Na concentrations (2-12%) from regional oceanic emissions, their net effect (direct and indirect) on the surface shortwave forcing is opposite and comparable or even larger in magnitude compared to those of regional anthropogenic emissions over the SEP. Two distinct regions are identified in the VOCALS-REx domain. The near-coast polluted region is characterized with strong droplet activation suppression of small particles by sea-salt particles, the more important role of the first than the second indirect effect, low surface precipitation rate, and low aerosol-cloud interaction strength associated with anthropogenic emissions. The relatively clean remote region is characterized with large contributions of Cloud Condensation Nuclei (CCN, number concentration denoted by NCCN) and droplet number concentrations (Nd) from non-local sources (lateral boundaries), a significant amount of surface precipitation, and high aerosol-cloud interactions under a scenario of five-fold increase in anthropogenic emissions. In the clean region, cloud properties have high sensitivity (e.g., 13% increase in cloud-top height and a 9% surface albedo increase) to the moderate increase in CCN concentration (?Nccn = 13 cm-3; 25%) produced by a five-fold increase in regional anthropogenic emissions. The increased anthropogenic aerosols reduce the precipitation amount over the relatively clean remote ocean. The reduction of precipitation (as a cloud water sink) more than doubles the wet scavenging timescale, resulting in an increased aerosol lifetime in the marine boundary layer. Therefore, the aerosol impacts on precipitation are amplified by the positive feedback of precipitation on aerosol. The positive feedback ultimately alters the cloud micro- and macro-properties, leading to strong aerosol-cloud-precipitation interactions. The higher sensitivity of clouds to anthropogenic aerosols over this region is also related to a 16% entrainment rate increase due to anthropogenic aerosols. The simulated aerosol-cloud-precipitation interactions are stronger at night over the clean marine region, while during the day, solar heating results in more frequent decoupling, thinner clouds, reduced precipitation, and reduced sensitivity to anthropogenic emissions. The simulated high sensitivity to the increased anthropogenic emissions over the clean region suggests that the perturbation of the clean marine environment with anthropogenic aerosols may have a larger effect on climate than that of already polluted marine environments.

Yang, Qing; Gustafson, William I.; Fast, Jerome D.; Wang, Hailong; Easter, Richard C.; Wang, Minghuai; Ghan, Steven J.; Berg, Larry K.; Leung, Lai-Yung R.; Morrison, H.

2012-09-28T23:59:59.000Z

451

Implementation and evaluation of online gas-phase chemistry within a regional climate model (RegCM-CHEM4)  

SciTech Connect

The RegCM-CHEM4 is a new online climate-chemistry model based on the International Centre for Theoretical Physics (ICTP) regional climate model (RegCM4). Tropospheric gas-phase chemistry is integrated into the climate model using the condensed version of the Carbon Bond Mechanism (CBM-Z; Zaveri and Peters, 1999) with a fast solver based on radical balances. We evaluate the model over Continental Europe for two different time scales: (1) an event-based analysis of the ozone episode associated with the heat wave of August 2003 and (2) a climatological analysis of a sixyear simulation (2000-2005). For the episode analysis, model simulations show good agreement with European Monitoring and Evaluation Program (EMEP) observations of hourly ozone over different regions in Europe and capture ozone concentrations during and after the August 2003 heat wave event. For long-term climate simulations, the model captures the seasonal cycle of ozone concentrations with some over prediction of ozone concentrations in non-heat wave summers. Overall, the ozone and ozone precursor evaluation shows the feasibility of using RegCM-CHEM4 for decadal-length simulations of chemistry-climate interactions.

Shalaby, A. K.; Zakey, A. S.; Tawfik, A. B.; Solmon, F.; Giorgi, Filippo; Stordal, F.; Sillman, S.; Zaveri, Rahul A.; Steiner, A. L.

2012-05-22T23:59:59.000Z

452

Monte Carlo modeling and analyses of YALINA- booster subcritical assembly Part II : pulsed neutron source.  

SciTech Connect

One of the most reliable experimental methods for measuring the kinetic parameters of a subcritical assembly is the Sjoestrand method applied to the reaction rate generated from a pulsed neutron source. This study developed a new analytical methodology for characterizing the kinetic parameters of a subcritical assembly using the Sjoestrand method, which allows comparing the analytical and experimental time dependent reaction rates and the reactivity measurements. In this methodology, the reaction rate, detector response, is calculated due to a single neutron pulse using MCNP/MCNPX computer code or any other neutron transport code that explicitly simulates the fission delayed neutrons. The calculation simulates a single neutron pulse over a long time period until the delayed neutron contribution to the reaction is vanished. The obtained reaction rate is superimposed to itself, with respect to the time, to simulate the repeated pulse operation until the asymptotic level of the reaction rate, set by the delayed neutrons, is achieved. The superimposition of the pulse to itself was calculated by a simple C computer program. A parallel version of the C program is used due to the large amount of data being processed, e.g. by the Message Passing Interface (MPI). The new calculation methodology has shown an excellent agreement with the experimental results available from the YALINA-Booster facility of Belarus. The facility has been driven by a Deuterium-Deuterium or Deuterium-Tritium pulsed neutron source and the (n,p) reaction rate has been experimentally measured by a {sup 3}He detector. The MCNP calculation has utilized the weight window and delayed neutron biasing variance reduction techniques since the detector volume is small compared to the assembly volume. Finally, this methodology was used to calculate the IAEA benchmark of the YALINA-Booster experiment.

Talamo, A.; Gohar, M. Y. A.; Rabiti, C.; Nuclear Engineering Division

2008-10-22T23:59:59.000Z

453

Validation of a virtual source model for Monte Carlo dose calculations of a flattening filter free linac  

SciTech Connect

Purpose: A linac delivering intensity-modulated radiotherapy (IMRT) can benefit from a flattening filter free (FFF) design which offers higher dose rates and reduced accelerator head scatter than for conventional (flattened) delivery. This reduction in scatter simplifies beam modeling, and combining a Monte Carlo dose engine with a FFF accelerator could potentially increase dose calculation accuracy. The objective of this work was to model a FFF machine using an adapted version of a previously published virtual source model (VSM) for Monte Carlo calculations and to verify its accuracy. Methods: An Elekta Synergy linear accelerator operating at 6 MV has been modified to enable irradiation both with and without the flattening filter (FF). The VSM has been incorporated into a commercially available treatment planning system (Monaco Trade-Mark-Sign v 3.1) as VSM 1.6. Dosimetric data were measured to commission the treatment planning system (TPS) and the VSM adapted to account for the lack of angular differential absorption and general beam hardening. The model was then tested using standard water phantom measurements and also by creating IMRT plans for a range of clinical cases. Results: The results show that the VSM implementation handles the FFF beams very well, with an uncertainty between measurement and calculation of <1% which is comparable to conventional flattened beams. All IMRT beams passed standard quality assurance tests with >95% of all points passing gamma analysis ({gamma} < 1) using a 3%/3 mm tolerance. Conclusions: The virtual source model for flattened beams was successfully adapted to a flattening filter free beam production. Water phantom and patient specific QA measurements show excellent results, and comparisons of IMRT plans generated in conventional and FFF mode are underway to assess dosimetric uncertainties and possible improvements in dose calculation and delivery.

Cashmore, Jason; Golubev, Sergey; Dumont, Jose Luis; Sikora, Marcin; Alber, Markus; Ramtohul, Mark [Hall-Edwards Radiotherapy Research Group, University Hospital Birmingham NHS Foundation Trust, United Kingdom, B15 2TH (United Kingdom); Elekta CMS Software, St. Louis, Missouri 63043 (United States); Department of Oncology and Medical Physics, Haukeland University Hospital, Bergen 5021 (Norway); Section for Biomedical Physics, University Hospital for Radiation Oncology, Hoppe-Seyler-Str 3, 72076, Tuebingen (Germany); Hall-Edwards Radiotherapy Research Group, University Hospital Birmingham NHS Foundation Trust, United Kingdom, B15 2TH (United Kingdom)

2012-06-15T23:59:59.000Z

454

Models for the lens and source of B0218+357 - A LensClean approach to determine H0  

E-Print Network (OSTI)

B0218+357 is one of the most promising systems to determine the Hubble constant from gravitational lenses. Consisting of two bright resolved images plus an Einstein ring, it provides better constraints for the mass model than other systems. The main problem left until now was the poorly determined position of the lensing galaxy. After presenting results from classical lens modelling, we apply our improved version of LensClean which utilizes the Einstein ring for lens modelling purposes. The primary result using isothermal models is a well defined lens position which allows the first reliable measurement of the Hubble constant from this system. The result of H0=(78+-6) km/s/Mpc (2 sigma) is high compared with other lenses but compatible with the HST key project and WMAP results. We furthermore discuss effects of different radial mass profiles. The power-law exponent of the potential is constrained by VLBI data to be beta=1.04+-0.02, very close to isothermal. The effect on H0 is expected to be very small. We also present a composite map (lensed and unlensed) which shows the rich structure of B0218+357 on scales from milli-arcseconds to arcseconds. Finally we use a comparison of observations at different frequencies to investigate the question of possible weakening of one of the images by propagation effects and/or source shifts with frequency. The data clearly favour the model of significant extinction without noticeable source position shifts. The technical details of our variant of the LensClean method are presented in the accompanying Paper I.

O. Wucknitz; A. D. Biggs; I. W. A. Browne

2003-12-10T23:59:59.000Z

455

Source-Term and building-Wake Consequence Modeling for the Godiva IV Reactor at Los Alamos National Laboratory  

Science Conference Proceedings (OSTI)

The objectives of this work were to evaluate the consequences of a postulated accident to onsite security personnel stationed near the facility during operations of the Godiva IV critical assembly and to identify controls needed to protect these personnel in case of an extreme criticality excursion equivalent to the design-basis accident (DBA). This paper presents the methodology and results of the source-term calculations, building ventilation rates, air concentrations, and consequence calculations that were performed using a multidisciplinary approach with several phenomenology models. Identification of controls needed to mitigate the consequences to near-field receptors is discussed.

Letellier, B.C.; McClure, P.; Restrepo, L.

1999-06-13T23:59:59.000Z

456

A Regional Climatography of West Nile, Uganda, to Support Human Plague Modeling  

Science Conference Proceedings (OSTI)

The West Nile region in northwestern Uganda is a focal point for human plague, which peaks in boreal autumn and is spread by fleas that travel on rodent hosts. The U.S. Centers for Disease Control and Prevention is collaborating with the National ...

Andrew J. Monaghan; Katherine MacMillan; Sean M. Moore; Paul S. Mead; Mary H. Hayden; Rebecca J. Eisen

2012-07-01T23:59:59.000Z

457

The Columbia Regional Geospatial Service Center System: A Proven Model for the United States  

Science Conference Proceedings (OSTI)

During the past 20 years, the role of geospatial technology in society has increased dramatically. However, the impact of these technologies in rural areas remains minimal. In Texas, a federally funded project called the Columbia Regional Geospatial ... Keywords: Distributed, Emergency, Geospatial, Response, Technology

P. R. Blackwell; Darrel McDonald

2011-01-01T23:59:59.000Z

458

A Curvilinear Ocean Model Using a Grid Regionally Compressed in the South Indian Ocean  

Science Conference Proceedings (OSTI)

It is shown that a global curvilinear grid with variable resolution is an efficient way of providing a high density of grid points in a particular region. In equilibrium experiments using asynchronous time steps, this type of grid has been found ...

Ross J. Murray; C. J. C. Reason

2001-10-01T23:59:59.000Z

459

KINETIC MODELING OF FUEL EFFECTS OVER A WIDE RANGE OF CHEMISTRY, PROPERTIES, AND SOURCES  

DOE Green Energy (OSTI)

Kinetic modeling is an important tool for engine design and can also be used for engine tuning and to study response to fuel chemistry and properties before an engine configuration is physically built and tested. Methodologies needed for studying fuel effects include development of fuel kinetic mechanisms for pure compounds, tools for designing surrogate blends of pure compounds that mimic a desired market fuel, and tools for reducing kinetic mechanisms to a size that allows inclusion in complex CFD engine models. In this paper, we demonstrate the use of these tools to reproduce engine results for a series of research diesel fuels using surrogate fuels in an engine and then modeling results with a simple 2 component surrogate blend with physical properties adjusted to vary fuel volatility. Results indicate that we were reasonably successful in mimicking engine performance of real fuels with blends of pure compounds. We were also successful in spanning the range of the experimental data using CFD and kinetic modeling, but further tuning and matching will be needed to exactly match engine performance of the real and surrogate fuels.

Bunting, Bruce G [ORNL; Bunce, Michael [ORNL; Niak, Chitralkumar [Reaction Design; Puduppakkam, Karthik [Reaction Design

2012-01-01T23:59:59.000Z

460

Improvements in Quantitative Precipitation Forecasts with the Eta Regional Model at the National Centers for Environmental Prediction: The 48-km Upgrade  

Science Conference Proceedings (OSTI)

Since 9 June 1993, the eta coordinate regional model has been run twice daily at the National Centers for Environmental Prediction (NCEP, previously the National Meteorological Center) as the NCEP's “early” operational model. Its performance is ...

Fedor Mesinger

1996-11-01T23:59:59.000Z

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461

Changes in 20th century extreme temperature and precipitation over the western United States based on observations and regional climate model simulations  

Science Conference Proceedings (OSTI)

Trends in extreme temperature and precipitation in two regional climate model simulations forced by two global climate models are compared with observed trends over the western United States. The observed temperature extremes show substantial and ...

Valérie Dulière; Yongxin Zhang; Eric P. Salathé Jr.

462

Asian monsoon and the Indian Ocean dipole25,26 Models have been used to investigate the regional effect of varying  

E-Print Network (OSTI)

Asian monsoon and the Indian Ocean dipole25,26 . Models have been used to investigate the regional with consequences for the monsoon7,8,28 . Although models investi- gate the contrast between `off' and `on' ITF5

Burgess, Neil

463

Assessment of Dynamical Downscaling in Near-Surface Fields with Different Spectral Nudging Approaches Using the Nested Regional Climate Model (NRCM)  

Science Conference Proceedings (OSTI)

Dynamic downscaling with regional-scale climate models is used widely for increasing the spatial resolution of global-scale climate model projections. One uncertainty in generating these projections is the choice of boundary forcing applied. In ...

Jiali Wang; Veerabhadra R. Kotamarthi

2013-07-01T23:59:59.000Z

464

A Habitat-based Wind-Wildlife Collision Model with Application to the Upper Great Plains Region  

DOE Green Energy (OSTI)

Most previous studies on collision impacts at wind facilities have taken place at the site-specific level and have only examined small-scale influences on mortality. In this study, we examine landscape-level influences using a hierarchical spatial model combined with existing datasets and life history knowledge for: Horned Lark, Red-eyed Vireo, Mallard, American Avocet, Golden Eagle, Whooping Crane, red bat, silver-haired bat, and hoary bat. These species were modeled in the central United States within Bird Conservation Regions 11, 17, 18, and 19. For the bird species, we modeled bird abundance from existing datasets as a function of habitat variables known to be preferred by each species to develop a relative abundance prediction for each species. For bats, there are no existing abundance datasets so we identified preferred habitat in the landscape for each species and assumed that greater amounts of preferred habitat would equate to greater abundance of bats. The abundance predictions for bird and bats were modeled with additional exposure factors known to influence collisions such as visibility, wind, temperature, precipitation, topography, and behavior to form a final mapped output of predicted collision risk within the study region. We reviewed published mortality studies from wind farms in our study region and collected data on reported mortality of our focal species to compare to our modeled predictions. We performed a sensitivity analysis evaluating model performance of 6 different scenarios where habitat and exposure factors were weighted differently. We compared the model performance in each scenario by evaluating observed data vs. our model predictions using spearmans rank correlations. Horned Lark collision risk was predicted to be highest in the northwestern and west-central portions of the study region with lower risk predicted elsewhere. Red-eyed Vireo collision risk was predicted to be the highest in the eastern portions of the study region and in the forested areas of the western portion; the lowest risk was predicted in the treeless portions of the northwest portion of the study area. Mallard collision risk was predicted to be highest in the eastern central portion of the prairie potholes and in Iowa which has a high density of pothole wetlands; lower risk was predicted in the more arid portions of the study area. Predicted collision risk for American Avocet was similar to Mallard and was highest in the prairie pothole region and lower elsewhere. Golden Eagle collision risk was predicted to be highest in the mountainous areas of the western portion of the study area and lowest in the eastern portion of the prairie potholes. Whooping Crane predicted collision risk was highest within the migration corridor that the birds follow through in the central portion of the study region; predicted collision risk was much lower elsewhere. Red bat collision risk was highly driven by large tracts of forest and river corridors which made up most of the areas of higher collision risk. Silver-haired bat and hoary bat predicted collision risk were nearly identical and driven largely by forest and river corridors as well as locations with warmer temperatures, and lower average wind speeds. Horned Lark collisions were mostly influenced by abundance and predictions showed a moderate correlation between observed and predicted mortality (r = 0.55). Red bat, silver-haired bat, and hoary bat predictions were much higher and shown a strong correlations with observed mortality with correlations of 0.85, 0.90, and 0.91 respectively. Red bat collisions were influenced primarily by habitat, while hoary bat and silver-haired bat collisions were influenced mainly by exposure variables. Stronger correlations between observed and predicted collision for bats than for Horned Larks can likely be attributed to stronger habitat associations and greater influences of weather on behavior for bats. Although the collision predictions cannot be compared among species, our model outputs provide a convenient and easy landscape-level tool to quick

Forcey, Greg, M.

2012-08-28T23:59:59.000Z

465

Regional Weather Prediction with a Model Combining Terrain-following and Isentropic Coordinates. Part I: Model Description  

Science Conference Proceedings (OSTI)

A short-range numerical prediction model, which is part of a real-time 3-h data assimilation and forecast system, is described. The distinguishing feature of the model is the use of terrain-following (?) coordinate surfaces in the lower ...

Rainer Bleck; Stanley G. Benjamin

1993-06-01T23:59:59.000Z

466

Advanced neutron source project information management. A model for the future  

SciTech Connect

The Advanced Neutron Source (ANS) is a proposed new research facility that will provide steady-state beams of neutrons for experiments by more than 1000 researchers per year in the fields of materials science and engineering, biology, chemistry, materials analysis, and nuclear science. The facility will also include irradiation capabilities to produce radioisotopes for medical applications, research, industry, and materials testing. This paper discusses the architecture and data flow used by the project, some quantitative examinations of potential cost savings and return on investment and software applications used to generate and manage data across IBM-compatible personal computers, Macintosh, and Unix-based workstations. Personnel management aspects addressed include providing paper copy to users only when needed for adequate technical review, using graded approaches to providing support for numerous user-needed software applications, and implementing a phased approach to compliance with computer-aided acquisition and logistic support (CALS) standards that allows sufficient user flexibility for performing technical tasks while providing needed data sharing and integration.

King-Jones, K.; Cleaves, J.

1995-12-31T23:59:59.000Z

467

Advanced Neutron Source project information management: A model for the future  

SciTech Connect

The Advanced Neutron Source (ANS) is a proposed new research facility that will provide steady-state beams of neutrons for experiments by more than 1,000 researchers per year in the fields of materials science and engineering, biology, chemistry, materials analysis, and nuclear science. The facility will also include irradiation capabilities to produce radioisotopes for medical applications, research, industry, and materials testing. This paper discusses the architecture and data flow used by the project, some quantitative examinations of potential cost savings and return on investment, and software applications used to generate and manage data across IBM-compatible personal computers, Macintosh, and Unix-based workstations. Personnel management aspects addressed include providing paper copy to users only when needed for adequate technical review, using graded approaches to providing support for numerous user-needed software applications, and implementing a phased approach to compliance with computer-aided acquisition and logistic support (CALS) standards that allows sufficient user flexibility for performing technical tasks while providing needed data sharing and integration.

King-Jones, K.; Cleaves, J.

1995-12-31T23:59:59.000Z

468

Improved ion source  

DOE Patents (OSTI)

A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species,

Leung, K.N.; Ehlers, K.W.

1982-05-04T23:59:59.000Z

469

Modeling Analysis of the Big Bend Regional Aerosol and Visibility Observational (BRAVO) Study  

Science Conference Proceedings (OSTI)

Particulate sulfate compounds account for approximately half of the particulate matter (PM) during periods of poor visibility at Big Bend National Park (BBNP). Poor visibility is associated with two distinct meteorological regimes -- one dominated by flow from Mexico during spring and summer months and another characterized by transport from regions northeast of BBNP during fall months. Accordingly, the monitoring component of BRAVO took place from July to October 1999. More than 30 sites were establishe...

2004-02-24T23:59:59.000Z

470

A Guide for Using the Transient Ground-Water Flow Model of the Death Valley Regional Ground-Water Flow System, Nevada and California  

SciTech Connect

This report is a guide for executing numerical simulations with the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California using the U.S. Geological Survey modular finite-difference ground-water flow model, MODFLOW-2000. Model inputs, including observations of hydraulic head, discharge, and boundary flows, are summarized. Modification of the DVRFS transient ground-water model is discussed for two common uses of the Death Valley regional ground-water flow system model: predictive pumping scenarios that extend beyond the end of the model simulation period (1998), and model simulations with only steady-state conditions.

Joan B. Blainey; Claudia C. Faunt, and Mary C. Hill

2006-05-16T23:59:59.000Z

471

Scenario Driven Data Modelling: A Method for Integrating Diverse Sources of Data and Data Streams  

SciTech Connect

Background Biology is rapidly becoming a data intensive, data-driven science. It is essential that data is represented and connected in ways that best represent its full conceptual content and allows both automated integration and data driven decision-making. Recent advancements in distributed multi-relational directed graphs, implemented in the form of the Semantic Web make it possible to deal with complicated heterogeneous data in new and interesting ways. Results This paper presents a new approach, scenario driven data modelling (SDDM), that integrates multi-relational directed graphs with data streams. SDDM can be applied to virtually any data integration challenge with widely divergent types of data and data streams. In this work, we explored integrating genetics data with reports from traditional media. SDDM was applied to the New Delhi metallo-beta-lactamase gene (NDM-1), an emerging global health threat. The SDDM process constructed a scenario, created a RDF multi-relational directed graph that linked diverse types of data to the Semantic Web, implemented RDF conversion tools (RDFizers) to bring content into the Sematic Web, identified data streams and analytical routines to analyse those streams, and identified user requirements and graph traversals to meet end-user requirements. Conclusions We provided an example where SDDM was applied to a complex data integration challenge. The process created a model of the emerging NDM-1 health threat, identified and filled gaps in that model, and constructed reliable software that monitored data streams based on the scenario derived multi-relational directed graph. The SDDM process significantly reduced the software requirements phase by letting the scenario and resulting multi-relational directed graph define what is possible and then set the scope of the user requirements. Approaches like SDDM will be critical to the future of data intensive, data-driven science because they automate the process of converting massive data streams into usable knowledge.

Griffith, Shelton D [ORNL; Quest, Daniel J [ORNL; Brettin, Thomas S [ORNL; Cottingham, Robert W [ORNL

2011-01-01T23:59:59.000Z

472

Simulations of present and future climates in the western U.S. with four nested regional climate models  

SciTech Connect

We analyze simulations of present and future climates in the western U.S. performed with four regional climate models (RCMs) nested within two global ocean-atmosphere climate models. Our primary goal is to assess the range of regional climate responses to increased greenhouse gases in available RCM simulations. The four RCMs used different geographical domains, different increased greenhouse gas scenarios for future-climate simulations, and (in some cases) different lateral boundary conditions. For simulations of the present climate, we compare RCM results to observations and to results of the GCM that provided lateral boundary conditions to the RCM. For future-climate (increased greenhouse gas) simulations, we compare RCM results to each other and to results of the driving GCMs. When results are spatially averaged over the western U.S., we find that the results of each RCM closely follow those of the driving GCM in the same region, in both present and future climates. In present-climate simulations, the RCMs have biases in spatially-averaged simulated precipitation and near-surface temperature that seem to be very close to those of the driving GCMs. In future-climate simulations, the spatially-averaged RCM-projected responses in precipitation and near-surface temperature are also very close to those of the respective driving GCMs. Precipitation responses predicted by the RCMs are in many regions not statistically significant compared to interannual variability. Where the predicted precipitation responses are statistically significant, they are positive. The models agree that near-surface temperatures will increase, but do not agree on the spatial pattern of this increase. The four RCMs produce very different estimates of water content of snow in the present climate, and of the change in this water content in response to increased greenhouse gases.

Duffy, P B; Arritt, R W; Coquard, J; Gutowski, W; Han, J; Iorio, J; Kim, J; Leung, L R; Roads, J; Zeledon, E

2004-06-15T23:59:59.000Z

473

Recent Advances in Regional Climate System Modeling and Climate Change Analyses of Extreme Heat  

E-Print Network (OSTI)

upgrade, as compared to the MM5-NOAH, has improved snowmelt,the MM5 code includes the NOAH land surface model within of2002 were produced by MM5-NOAH and MM5-CLM (denoted as Old

Miller, Norman L.

2004-01-01T23:59:59.000Z

474

How Well Do Large-Scale Models Reproduce Regional Hydrological Extremes in Europe?  

Science Conference Proceedings (OSTI)

This paper presents a new methodology for assessing the ability of gridded hydrological models to reproduce large-scale hydrological high and low flow events (as a proxy for hydrological extremes) as described by catalogues of historical droughts [...

Christel Prudhomme; Simon Parry; Jamie Hannaford; Douglas B. Clark; Stefan Hagemann; Frank Voss

2011-12-01T23:59:59.000Z

475

Hydrologic implications of different large-scale meteorological model forcing datasets in mountainous regions  

Science Conference Proceedings (OSTI)

Process-based hydrologic models require extensive meteorological forcing data, including data on precipitation, temperature, shortwave and longwave radiation, humidity, surface pressure and wind speed. Observations of precipitation and temperature ...

Naoki Mizukami; Martyn Clark; Andrew Slater; Levi Brekke; Marketa Elsner; Jeffrey Arnold; Subhrendu Gangopadhyay

476

Regional Climates in the GISS General Circulation Model: Surface Air Temperature  

Science Conference Proceedings (OSTI)

One of the more viable research techniques into global climate change for the purpose of understanding the consequent environmental impacts is based on the use of general circulation models (GCMs). However, GCMs are currently unable to reliably ...

Bruce Hewitson

1994-02-01T23:59:59.000Z