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Note: This page contains sample records for the topic "land surface interaction" 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.


1

ARM - Field Campaign - Cloud LAnd Surface Interaction Campaign (CLASIC)  

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

govCampaignsCloud LAnd Surface Interaction Campaign (CLASIC) govCampaignsCloud LAnd Surface Interaction Campaign (CLASIC) Campaign Links CLASIC Website Related Campaigns CLASIC - SAM Support 2007.06.09, DeVore, SGP CLASIC - 9.4 GHz Phase Array Radar 2007.06.08, Kollias, SGP CLASIC - Southern Great Plains Aerosol Evolution Study (SGPAES) 2007.06.08, Collins, SGP CLASIC - Land Surface 2007.06.01, Jackson, SGP CLASIC - Radiosonde Campaign 2007.06.01, Orr, SGP CLASIC - SGP Particle Phase Experiment 2007.06.01, Martin, SGP CLASIC - Land-Cloud Coupled Data Assimilation System 2007.06.01, Jackson, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Cloud LAnd Surface Interaction Campaign (CLASIC) 2007.06.01 - 2007.06.30 Website : http://acrf-campaign.arm.gov/clasic/ Lead Scientist : Mark Miller

2

SGP Cloud and Land Surface Interaction Campaign (CLASIC)  

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

3 3 SGP Cloud and Land Surface Interaction Campaign (CLASIC): Science and Implementation Plan June 2007 Mark A. Miller, Principal Investigator and The CLASIC Steering Committee: Roni Avissar, Larry Berg, Sylvia Edgerton, Marc Fischer, Tom Jackson, Bill Kustas, Pete Lamb, Greg McFarquhar, Qilong Min, Beat Schmid, Margaret Torn, and Dave Turner Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research M.R. Miller et al., DOE/SC-ARM-0703 Executive Summary The Cloud and Land Surface Interaction Campaign is a field experiment designed to collect a comprehensive data set that can be used to quantify the interactions that occur between the atmosphere, biosphere, land surface, and subsurface. A particular focus will be on how these

3

SGP Cloud and Land Surface Interaction Campaign (CLASIC): Measurement Platforms  

SciTech Connect

The Cloud and Land Surface Interaction Campaign (CLASIC) will be conducted from June 8 to June 30, 2007, at the U.S. Department of Energy’s Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) Southern Great Plains (SGP) site. Data will be collected using eight aircraft equipped with a variety of specialized sensors, four specially instrumented surface sites, and two prototype surface radar systems. The architecture of CLASIC includes a high-altitude surveillance aircraft and enhanced vertical thermodynamic and wind profile measurements that will characterize the synoptic scale structure of the clouds and the land surface within the ACRF SGP site. Mesoscale and microscale structures will be sampled with a variety of aircraft, surface, and radar observations. An overview of the measurement platforms that will be used during the CLASIC are described in this report. The coordination of measurements, especially as it relates to aircraft flight plans, will be discussed in the CLASIC Implementation Plan.

MA Miller; R Avissar; LK Berg; SA Edgerton; ML Fischer; TJ Jackson; B. Kustas; PJ Lamb; G McFarquhar; Q Min; B Schmid; MS Torn; DD Tuner

2007-06-01T23:59:59.000Z

4

Development of a Unified Land Model for Prediction of Surface Hydrology and Land–Atmosphere Interactions  

Science Conference Proceedings (OSTI)

A unified land model (ULM) is described that combines the surface flux parameterizations in the Noah land surface model (used in most of NOAA’s coupled weather and climate models) with the Sacramento Soil Moisture Accounting model (Sac; used for ...

Ben Livneh; Pedro J. Restrepo; Dennis P. Lettenmaier

2011-12-01T23:59:59.000Z

5

Comparison of the Land-Surface Interaction in the ECMWF Reanalysis Model with the 1987 FIFE Data  

Science Conference Proceedings (OSTI)

Data from the First ISLSCP (International Satellite Land Surface Climatology Project) Field Experiment for the summer season of 1987 are used to assess the land-surface interaction of the ECMWF reanalysis. In comparison with an earlier study, ...

Alan K. Betts; Pedro Viterbo; Anton C. M. Beljaars

1998-01-01T23:59:59.000Z

6

Convective Planetary Boundary Layer Interactions with the Land Surface at Diurnal Time Scales: Diagnostics and Feedbacks  

Science Conference Proceedings (OSTI)

The convective planetary boundary layer (PBL) integrates surface fluxes and conditions over regional and diurnal scales. As a result, the structure and evolution of the PBL contains information directly related to land surface states. To examine ...

Joseph A. Santanello Jr.; Mark A. Friedl; Michael B. Ek

2007-10-01T23:59:59.000Z

7

Interactions between the Land Surface and Mesoscale Rainfall Variability during HAPEX-Sahel  

Science Conference Proceedings (OSTI)

The Hydrological Atmospheric Pilot Experiment in the Sahel (HAPEX-Sahel) was designed to investigate land–atmosphere interactions in the semiarid conditions of southwest Niger. During the intensive observation period (IOP) in 1992, a pronounced ...

Christopher M. Taylor; Frédérique Saïd; Thierry Lebel

1997-09-01T23:59:59.000Z

8

Investigation of Large-Scale Atmospheric Moisture Budget and Land Surface Interactions over U.S. Southern Great Plains including for CLASIC (June 2007)  

Science Conference Proceedings (OSTI)

The atmospheric moisture budget and surface interactions for the southern Great Plains are evaluated for contrasting May–June periods (1998, 2002, 2006, and 2007) as background for the Cloud and Land Surface Interaction Campaign (CLASIC) of (wet) ...

Peter J. Lamb; Diane H. Portis; Abraham Zangvil

2012-12-01T23:59:59.000Z

9

Atmosphere–Land Surface Interactions over the Southern Great Plains: Characterization from Pentad Analysis of DOE ARM Field Observations and NARR  

Science Conference Proceedings (OSTI)

The Department of Energy Atmospheric Radiation Measurement Program (ARM) Southern Great Plains (SGP) site data are analyzed to provide insight into atmosphere–land surface interactions generating summertime precipitation variability. Pentad-...

Alfredo Ruiz-Barradas; Sumant Nigam

2013-02-01T23:59:59.000Z

10

A Modeling Study of Irrigation Effects on Surface Fluxes and Land–Air–Cloud Interactions in the Southern Great Plains  

Science Conference Proceedings (OSTI)

In this study, the authors incorporate an operational-like irrigation scheme into the Noah land surface model as part of the Weather Research and Forecasting Model (WRF). A series of simulations, with and without irrigation, is conducted over the ...

Yun Qian; Maoyi Huang; Ben Yang; Larry K. Berg

2013-06-01T23:59:59.000Z

11

Impacts of a Parameterization Deficiency on Offline and Coupled Land Surface Model Simulations  

Science Conference Proceedings (OSTI)

Surface water and energy balance plays an important role in land surface models, especially in coupled land surface–atmospheric models due to the complicated interactions between land surfaces and the overlying atmosphere. The primary purpose of ...

Yuqiong Liu; Luis A. Bastidas; Hoshin V. Gupta; Soroosh Sorooshian

2003-10-01T23:59:59.000Z

12

Extreme Maximum Land Surface Temperatures  

Science Conference Proceedings (OSTI)

There are numerous reports in the literature of observations of land surface temperatures. Some of these, almost all made in situ, reveal maximum values in the 50°–70°C range, with a few, made in desert regions, near 80°C. Consideration of a ...

J. R. Garratt

1992-09-01T23:59:59.000Z

13

The IAGL Land Surface Model  

Science Conference Proceedings (OSTI)

A model that computes the fluxes of energy and momentum between the land surface and the atmosphere is presented. It is designed to serve as a lower boundary in a mesoscale atmospheric model and is intended to be used to study the influence of ...

Koen De Ridder; Guy Schayes

1997-02-01T23:59:59.000Z

14

Time Scales of Land Surface Hydrology  

Science Conference Proceedings (OSTI)

This paper intends to investigate the time scales of land surface hydrology and enhance the understanding of the hydrological cycle between the atmosphere, vegetation, and soil. A three-layer model for land surface hydrology is developed to study ...

Aihui Wang; Xubin Zeng; Samuel S. P. Shen; Qing-Cun Zeng; Robert E. Dickinson

2006-10-01T23:59:59.000Z

15

A New Characterization of the Land Surface Heterogeneity over Africa for Use in Land Surface Models  

Science Conference Proceedings (OSTI)

Information related to land surface is immensely important to global change science. For example, land surface changes can alter regional climate through its effects on fluxes of water, energy, and carbon. In the past decades, data sources and ...

Armel Thibaut Kaptué Tchuenté; Jean-Louis Roujean; Agnès Bégué; Sietse O. Los; Aaron A. Boone; Jean-François Mahfouf; Dominique Carrer; Badiane Daouda

2011-12-01T23:59:59.000Z

16

An Improved Land Surface Emissivity Parameter for Land Surface Models Using Global Remote Sensing Observations  

Science Conference Proceedings (OSTI)

Because land surface emissivity (?) has not been reliably measured, global climate model (GCM) land surface schemes conventionally set this parameter as simply constant, for example, 1 as in the National Oceanic and Atmospheric Administration (...

Menglin Jin; Shunlin Liang

2006-06-01T23:59:59.000Z

17

Estimation of turbulent surface heat fluxes using sequences of remotely sensed land surface temperature  

E-Print Network (OSTI)

Fluxes of heat and moisture at the land-surface play a significant role in the climate system. These fluxes interact with the overlying atmosphere and influence the characteristics of the planetary boundary layer (e.g. ...

Bateni, Sayed Mohyeddin

2011-01-01T23:59:59.000Z

18

A Study of Convection Initiation in a Mesoscale Model Using High-Resolution Land Surface Initial Conditions  

Science Conference Proceedings (OSTI)

A coupled convection-resolving mesoscale atmosphere–land surface model (LSM) is used to investigate land surface–planetary boundary layer (PBL) interactions responsible for the initiation of deep, moist convection over the southern Great Plains ...

Stanley B. Trier; Fei Chen; Kevin W. Manning

2004-12-01T23:59:59.000Z

19

The Land Surface Scheme ISBA within the Météo-France Climate Model ARPEGE. Part I. Implementation and Preliminary Results  

Science Conference Proceedings (OSTI)

This paper describes recent developments in climate modeling at Météo-France related to land surface processes. The implementation of a simple land surface parameterization, Interactions between Soil Biosphere Atmosphere (ISBA), has gained from ...

J-F. Mahfouf; A. O. Manzi; J. Noilhan; H. Giordani; M. DéQué

1995-08-01T23:59:59.000Z

20

Application for State Land Use Lease: Surface Lease (SL) - Coastal...  

Open Energy Info (EERE)

for State Land Use Lease: Surface Lease (SL) - Coastal Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Reference Material: Application for State Land Use Lease:...

Note: This page contains sample records for the topic "land surface interaction" 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

Systematic Bias in Land Surface Models  

Science Conference Proceedings (OSTI)

A neural network–based flux correction technique is applied to three land surface models. It is then used to show that the nature of systematic model error in simulations of latent heat, sensible heat, and the net ecosystem exchange of CO2 is ...

Gab Abramowitz; Andy Pitman; Hoshin Gupta; Eva Kowalczyk; Yingping Wang

2007-10-01T23:59:59.000Z

22

Land Surface Reflectance: A Possible Earth Science  

E-Print Network (OSTI)

are in magenta, water bodies are outlined in white. MODIS Surface Reflectance South Africa From: E. Vermote, UMD correction (low, medium, high) ­ cloud and cloud shadow ­ snow flag ­ land/water flag · Supplemental information ­ Viewing geometry (view and solar zenith and azimuth angles) ­ Geolocation (lat

23

Evaluating the Performance of Land Surface Models  

Science Conference Proceedings (OSTI)

This paper presents a set of analytical tools to evaluate the performance of three land surface models (LSMs) that are used in global climate models (GCMs). Predictions of the fluxes of sensible heat, latent heat, and net CO2 exchange obtained ...

Gab Abramowitz; Ray Leuning; Martyn Clark; Andy Pitman

2008-11-01T23:59:59.000Z

24

The Land Surface Climatology of the NCAR Land Surface Model Coupled to the NCAR Community Climate Model  

Science Conference Proceedings (OSTI)

The National Center for Atmospheric Research (NCAR) Land Surface Model (LSM, version 1.0) provides a comprehensive treatment of land surface processes for the NCAR Community Climate Model version 3 (CCM3). It replaces the prescribed surface ...

Gordon B. Bonan

1998-06-01T23:59:59.000Z

25

Optimally Merging Precipitation to Minimize Land Surface Modeling Errors  

Science Conference Proceedings (OSTI)

This paper introduces a new method to improve land surface model skill by merging different available precipitation datasets, given that an accurate land surface parameter ground truth is available. Precipitation datasets are merged with the ...

M. Tugrul Yilmaz; Paul Houser; Roshan Shrestha; Valentine G. Anantharaj

2010-03-01T23:59:59.000Z

26

Global scale hydrology - Advances in land surface modeling  

Science Conference Proceedings (OSTI)

Research into global scale hydrology is an expanding area that includes researchers from the meteorology, climatology, ecology and hydrology communities. This paper reviews research in this area carried out in the United States during the last IUGG quadrennial period of 1987-1990. The review covers the representation of land-surface hydrologic processes for general circulation models (GCMs), sensitivity analysis of these representations on global hydrologic fields like precipitation, regional studies of climate that have global hydrologic implications, recent field studies and experiments whose aims are the improved understanding of land surface-atmospheric interactions, and the use of remotely sensed data for the further understanding of the spatial variability of surface hydrologic processes that are important at regional and global climate scales. 76 refs.

Wood, E.F. (USAF, Geophysics Laboratory, Hanscom AFB, MA (United States))

1991-01-01T23:59:59.000Z

27

Influences of biomass heat and biochemical energy storages on the land surface fluxes and radiative temperature  

E-Print Network (OSTI)

Influences of biomass heat and biochemical energy storages on the land surface fluxes and radiative energy storages for land-atmosphere interactions, an issue that has been largely neglected so far. We the representation of biomass energy storages against measurements of surface energy and CO2 fluxes. We

28

Land information system: An interoperable framework for high resolution land surface modeling  

E-Print Network (OSTI)

surface states and fluxes. LIS employs the use of scalable, high performance computing and data management. All rights reserved. Keywords: Land surface modeling; High performance computing; Object

Houser, Paul R.

29

An interactive land use VRML application (ILUVA) with servlet assist  

Science Conference Proceedings (OSTI)

We summarize progress achieved on an interactive land use VRML application (ILUVA) with servlet assist. The purpose of this application is to enable one to take a virtual land area and add buildings, roadways, landscaping and other features. The application ...

Lee A. Belfore, II; Suresh Chitithoti

2000-12-01T23:59:59.000Z

30

Adaptive Multilevel Modeling of Land-Atmosphere Interactions  

Science Conference Proceedings (OSTI)

Adaptive multilevel methods allow full coupling of atmospheric and land surface hydrological models by preserving consistency between the large-scale (atmospheric) and the regional (land) components. The methodology was investigated for three ...

Ana Paula Barros

1995-09-01T23:59:59.000Z

31

Diurnal to Annual Precipitation Sensitivity to Convective and Land Surface Schemes  

Science Conference Proceedings (OSTI)

Precipitation’s diurnal to annual variance distribution and atmospheric water cycle component interactions are examined globally for sensitivity to convective and land surface schemes. The main regional features of statistics identified in ...

Alex C. Ruane; John O. Roads

2008-06-01T23:59:59.000Z

32

Hydrological Land Surface Response in a Tropical Regime and a Midlatitudinal Regime  

Science Conference Proceedings (OSTI)

A statistical–dynamical study was performed on the role of hydrometeorological interactions in the midlatitudes and the semiarid Tropics. For this, observations from two field experiments, the First International Satellite Land Surface ...

Devdutta S. Niyogi; Yongkang Xue; Sethu Raman

2002-02-01T23:59:59.000Z

33

A Review of Satellite Data Algorithms for Studies of the Land Surface  

Science Conference Proceedings (OSTI)

Satellite observations are essential for the global monitoring of climatologically significant interactions between the earth's atmosphere and land surface. In practice, however, interpretation of remote-sensing data requires the use of ...

P. J. Sellers; S. I. Rasool; H-J. Bolle

1990-10-01T23:59:59.000Z

34

Representation of Water Table Dynamics in a Land Surface Scheme. Part II: Subgrid Variability  

Science Conference Proceedings (OSTI)

A lumped unconfined aquifer model has been developed and interactively coupled to a land surface scheme in a companion paper. Here, the issue of the representation of subgrid variability of water table depths (WTDs) is addressed. A statistical–...

Pat J-F. Yeh; Elfatih A. B. Eltahir

2005-06-01T23:59:59.000Z

35

A Land–Atmospheric Interaction Study in the Coastal Tropical City of San Juan, Puerto Rico  

Science Conference Proceedings (OSTI)

This paper focuses on the surface–atmospheric interaction in a tropical coastal city including the validation of an atmospheric modeling and an impact study of land-cover and land-use (LCLU) changes. The Regional Atmospheric Modeling System (RAMS)...

Daniel E. Comarazamy; Jorge E. González; Jeffrey C. Luvall; Douglas L. Rickman; Pedro J. Mulero

2010-11-01T23:59:59.000Z

36

The Probability Distribution of Land Surface Wind Speeds  

Science Conference Proceedings (OSTI)

The probability density function (pdf) of land surface wind speeds is characterized using a global network of observations. Daytime surface wind speeds are shown to be broadly consistent with the Weibull distribution, while nighttime surface wind ...

Adam H. Monahan; Yanping He; Norman McFarlane; Aiguo Dai

2011-08-01T23:59:59.000Z

37

Variational Estimation of Land–Atmosphere Heat Fluxes and Land Surface Parameters Using MODIS Remote Sensing Data  

Science Conference Proceedings (OSTI)

A variational data assimilation algorithm for assimilating the land surface temperature (LST) into the Common Land Model (CLM) was implemented using the land surface energy balance equation as the adjoint physical constraint. In this data ...

Chunlei Meng; Chaolin Zhang; Ronglin Tang

2013-04-01T23:59:59.000Z

38

On the connection between continental-scale land surface processes and the tropical climate in a coupled ocean-atmosphere-land system  

Science Conference Proceedings (OSTI)

An evaluation is presented of the impact on tropical climate of continental-scale perturbations given by different representations of land surface processes (LSP) in a general circulation model that includes atmosphere-ocean interactions. One ...

Hsi-Yen Ma; C. Roberto Mechoso; Yongkang Xue; Heng Xiao; J. David Neelin; Xuan Ji

39

A Numerical Investigation of Land Surface Water on Landfalling Hurricanes  

Science Conference Proceedings (OSTI)

Little is known about the effects of surface water over land on the decay of landfalling hurricanes. This study, using the National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory hurricane model, examines the surface ...

Weixing Shen; Isaac Ginis; Robert E. Tuleya

2002-02-01T23:59:59.000Z

40

A Comparative Analysis of Two Land Surface Heterogeneity Representations  

Science Conference Proceedings (OSTI)

Two contrasting representations of land surface variability used in general circulation models (GCMS) are compared through an analysis of their corresponding surface energy balance equations. In one representation (the “mixture” approach), ...

Randal D. Koster; Max J. Suarez

1992-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Toward an Operational Land Surface Temperature Algorithm for GOES  

Science Conference Proceedings (OSTI)

For most land surface temperature (LST) regression algorithms, a set of optimized coefficients is determined by manual separation of the different sub-divisions of atmospheric and surface conditions. In this study, we introduce a machine learning ...

Donglian Sun; Yunyue Yu; Li Fang; Yuling Liu

42

Toward an Operational Land Surface Temperature Algorithm for GOES  

Science Conference Proceedings (OSTI)

For most land surface temperature (LST) regression algorithms, a set of optimized coefficients is determined by manual separation of the different subdivisions of atmospheric and surface conditions. In this study, a machine-learning technique, the ...

Donglian Sun; Yunyue Yu; Li Fang; Yuling Liu

2013-09-01T23:59:59.000Z

43

The Project for Intercomparison of Land-surface Parameterization Schemes  

Science Conference Proceedings (OSTI)

The Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) is described and the first stage science plan outlined. PILPS is a project designed to improve the parameterization of the continental surface, especially the ...

A. Henderson-Sellers; Z-L. Yang; R. E. Dickinson

1993-07-01T23:59:59.000Z

44

Applied Modeling of the Nighttime Surface Energy Balance over Land  

Science Conference Proceedings (OSTI)

In this paper a semiempirical scheme is proposed which relates the nocturnal surface fluxes of sensible heat, latent heat, and momentum to routine weather data. The main components of the surface radiation and energy balance over land are ...

A. A. M. Holtslag; H. A. R. De Bruin

1988-06-01T23:59:59.000Z

45

Carbon Sequestration on Surface Mine Lands  

SciTech Connect

Since the implementation of the federal Surface Mining Control and Reclamation Act of 1977 (SMCRA) in May of 1978, many opportunities have been lost for the reforestation of surface mines in the eastern United States. Research has shown that excessive compaction of spoil material in the backfilling and grading process is the biggest impediment to the establishment of productive forests as a post-mining land use (Ashby, 1998, Burger et al., 1994, Graves et al., 2000). Stability of mine sites was a prominent concern among regulators and mine operators in the years immediately following the implementation of SMCRA. These concerns resulted in the highly compacted, flatly graded, and consequently unproductive spoils of the early post-SMCRA era. However, there is nothing in the regulations that requires mine sites to be overly compacted as long as stability is achieved. It has been cultural barriers and not regulatory barriers that have contributed to the failure of reforestation efforts under the federal law over the past 27 years. Efforts to change the perception that the federal law and regulations impede effective reforestation techniques and interfere with bond release must be implemented. Demonstration of techniques that lead to the successful reforestation of surface mines is one such method that can be used to change perceptions and protect the forest ecosystems that were indigenous to these areas prior to mining. The University of Kentucky initiated a large-scale reforestation effort to address regulatory and cultural impediments to forest reclamation in 2003. During the three years of this project 383,000 trees were planted on over 556 acres in different physiographic areas of Kentucky (Table 1, Figure 1). Species used for the project were similar to those that existed on the sites before mining was initiated (Table 2). A monitoring program was undertaken to evaluate growth and survival of the planted species as a function of spoil characteristics and reclamation practice. In addition, experiments were integrated within the reforestation effort to address specific questions pertaining to sequestration of carbon (C) on these sites.

Donald Graves; Christopher Barton; Richard Sweigard; Richard Warner; Carmen Agouridis

2006-03-31T23:59:59.000Z

46

The Sensitivity of a Land Surface Parameterization Scheme to the Choice of Remotely Sensed Land-Cover Datasets  

Science Conference Proceedings (OSTI)

The characteristics of satellite-derived land-cover data for climate models vary depending on sensor properties and processing options. To better understand the first-order effects of differences in land-cover data on a land surface ...

K. W. Oleson; K. L. Driese; J. A. Maslanik; W. J. Emery; W. A. Reiners

1997-07-01T23:59:59.000Z

47

Trends in Land–Atmosphere Interactions from CMIP5 Simulations  

Science Conference Proceedings (OSTI)

Data from 15 models of phase 5 of the Coupled Model Intercomparison Project (CMIP5) for preindustrial, historical, and future climate change experiments are examined for consensus changes in land surface variables, fluxes, and metrics relevant to ...

Paul A. Dirmeyer; Yan Jin; Bohar Singh; Xiaoqin Yan

2013-06-01T23:59:59.000Z

48

High-performance land surface modeling with a Linux cluster  

Science Conference Proceedings (OSTI)

The Land Information System (LIS) was developed at NASA to perform global land surface simulations at a resolution of 1-km or finer in real time. Such unprecedented scales and intensity pose many computational challenges. In this article, we demonstrate ... Keywords: Beowulf cluster, Distributed computing, High-resolution simulation, Hydrology modeling, Parallel computing, Peer-to-peer network

Y. Tian; C. D. Peters-Lidard; S. V. Kumar; J. Geiger; P. R. Houser; J. L. Eastman; P. Dirmeyer; B. Doty; J. Adams

2008-11-01T23:59:59.000Z

49

Global and Local Effect of Increasing Land Surface Albedo as...  

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

Global and Local Effect of Increasing Land Surface Albedo as a Geo-Engineering AdaptationMitigation Option: A Case Study of Mediterranean Greenhouse Farming Speaker(s): Pablo...

50

Calculation of the Energy Budget for Heterogeneous Land Surfaces  

Science Conference Proceedings (OSTI)

In this paper a scheme is presented for calculating the land surface energy budget based on the first law of thermodynamics. It takes into account the effects of water multiphase changes and hydrologic process. The enthalpy expression for a ...

Zhengqiu Zhang; Xiuji Zhou; Weiliang Li; Michael Sparrow

2003-01-01T23:59:59.000Z

51

Incorporating Anthropogenic Water Regulation Modules into a Land Surface Model  

Science Conference Proceedings (OSTI)

Anthropogenic activities have been significantly perturbing global freshwater flows and groundwater reserves. Despite numerous advances in the development of land surface models (LSMs) and global terrestrial hydrological models (GHMs), relatively ...

Yadu Pokhrel; Naota Hanasaki; Sujan Koirala; Jaeil Cho; Pat J.-F. Yeh; Hyungjun Kim; Shinjiro Kanae; Taikan Oki

2012-02-01T23:59:59.000Z

52

Surface Energy Components and Land Characteristics of a Rice Paddy  

Science Conference Proceedings (OSTI)

Many meteorological and air-quality models require land characteristics as inputs. A field experiment was conducted to study the surface energy budget of a rice paddy in Taiwan. During the day, the energy balance ratio measured by an eddy ...

Jeng-Lin Tsai; Ben-Jei Tsuang; Po-Sheng Lu; Ming-Hwi Yao; Yuan Shen

2007-11-01T23:59:59.000Z

53

Role of land surface processes in South American monsoon development  

E-Print Network (OSTI)

T. Yasunari, 1998: Monsoons: Processes, pre- dictability,land surface processes in monsoon de- velopment: East AsiaK. -M. Lau, 1998: Does a monsoon climate exist over South

Xue, Y; de Sales, F; Li, W P; Mechoso, C R; Nobre, C A; Juang, H M

2006-01-01T23:59:59.000Z

54

The Influence of Land Surface Moisture Retention on Precipitation Statistics  

Science Conference Proceedings (OSTI)

The retention of precipitation water in land surface reservoirs damps higher frequencies of evaporation variability and can thereby influence the feedback of evaporation on precipitation. The extent of this influence is examined in a series of ...

Randal D. Koster; Max J. Suarez

1996-10-01T23:59:59.000Z

55

Development of a Land Surface Model. Part II: Data Assimilation  

Science Conference Proceedings (OSTI)

Part I described a land surface model, its implementation in the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5), and some model evaluation results. Part II describes the indirect soil ...

Jonathan E. Pleim; Aijun Xiu

2003-12-01T23:59:59.000Z

56

Development of a Coupled Land Surface and Groundwater Model  

Science Conference Proceedings (OSTI)

Traditional land surface models (LSMs) used for numerical weather simulation, climate projection, and as inputs to water management decision support systems, do not treat the LSM lower boundary in a fully process-based fashion. LSMs have evolved ...

Reed M. Maxwell; Norman L. Miller

2005-06-01T23:59:59.000Z

57

A Simple Parameterization of Land Surface Processes for Meteorological Models  

Science Conference Proceedings (OSTI)

A parameterization of land surface processes to be included in mesoscale and large-scale meteorological models is presented. The number of parameters has been reduced as much as possible, while attempting to preserve the representation of the ...

J. Noilhan; S. Planton

1989-03-01T23:59:59.000Z

58

Land Surface Energy and Moisture Fluxes: Comparing Three Models  

Science Conference Proceedings (OSTI)

Three different land surface schemes that are designed for use in atmospheric general circulation models are compared. They were run in offline mode with identical atmospheric forcing values that were observed at Cabauw. This procedure allows one ...

J-P. Schulz; L. Dümenil; J. Polcher; C. A. Schlosser; Y. Xue

1998-03-01T23:59:59.000Z

59

Development of High Resolution Land Surface Parameters for the Community Land Model  

SciTech Connect

There is a growing need for high-resolution land surface parameters as land surface models are being applied at increasingly higher spatial resolution offline as well as in regional and global models. The default land surface parameters for the most recent version of the Community Land Model (i.e. CLM 4.0) are at 0.5° or coarser resolutions, released with the Community Earth System Model (CESM). Plant Functional Types (PFTs), vegetation properties such as Leaf Area Index (LAI), Stem Area Index (SAI), and non-vegetated land covers were developed using remotely sensed datasets retrieved in late 1990’s and the beginning of this century. In this study, we developed new land surface parameters for CLM 4.0, specifically PFTs, LAI, SAI and non-vegetated land cover composition, at 0.05° resolution globally based on the most recent MODIS land cover and improved MODIS LAI products. Compared to the current CLM 4.0 parameters, the new parameters produced a decreased coverage by bare soil and trees, but an increased coverage by shrub, grass, and cropland. The new parameters result in a decrease in global seasonal LAI, with the biggest decrease in boreal forests; however, the new parameters also show a large increase in LAI in tropical forest. Differences between the new and the current parameters are mainly caused by changes in the sources of remotely sensed data and the representation of land cover in the source data. Advantages and disadvantages of each dataset were discussed in order to provide guidance on the use of the data. The new high-resolution land surface parameters have been used in a coupled land-atmosphere model (WRF-CLM) applied to the western U.S. to demonstrate their use in high-resolution modeling. A remapping method from the latitude/longitude grid of the CLM data to the WRF grids with map projection was also demonstrated. Future work will include global offline CLM simulations to examine the impacts of source data resolution and subsequent land parameter changes on simulated land surface processes.

Ke, Yinghai; Leung, Lai-Yung R.; Huang, Maoyi; Coleman, Andre M.; Li, Hongyi; Wigmosta, Mark S.

2012-11-06T23:59:59.000Z

60

Parameterization of Land Surface Processes to Study Boundary Layer Characteristics over a Semiarid Region in Northwest India  

Science Conference Proceedings (OSTI)

The atmospheric boundary layer and land surface processes play a crucial role and affect large-scale phenomena such as monsoons. A comprehensive soil–vegetation parameterization scheme has been developed to understand the complex interaction of ...

A. N. V. Satyanarayana; V. N. Lykossov; U. C. Mohanty; E. E. Machul'skaya

2003-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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.


61

CARBON SEQUESTRATION ON SURFACE MINE LANDS  

SciTech Connect

An area planted in 2004 on Bent Mountain in Pike County was shifted to the Department of Energy project to centralize an area to become a demonstration site. An additional 98.3 acres were planted on Peabody lands in western Kentucky and Bent Mountain to bring the total area under study by this project to 556.5 acres as indicated in Table 2. Major efforts this quarter include the implementation of new plots that will examine the influence of differing geologic material on tree growth and survival, water quality and quantity and carbon sequestration. Normal monitoring and maintenance was conducted and additional instrumentation was installed to monitor the new areas planted.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2005-06-22T23:59:59.000Z

62

Other Surface Impoundments and Land Applications (Oklahoma)  

Energy.gov (U.S. Department of Energy (DOE))

A water quality permit is required from the Department of Environmental Quality to construct, install, operate or close any industrial surface impoundment, industrial septic tank or treatment...

63

Land surface conditions over Eurasia and Indian summer monsoon rainfall  

E-Print Network (OSTI)

Land surface conditions over Eurasia and Indian summer monsoon rainfall Alan Robock and Mingquan Mu, surface air temperature, atmospheric circulation, and Indian summer monsoon precipitation from 1870 to 2000, we examine the relationship between interannual variations of the strength of the monsoon

Robock, Alan

64

Continuous Monitoring of Nearest Neighbors on Land Surface Songhua Xing  

E-Print Network (OSTI)

As geo-realistic rendering of land surfaces is becoming commonplace in geographical information systems- tree suffers from intrinsic defects: it is fat and short, and hence does not improve the query, a realistic, accurate and detailed rendering of Earth surfaces is becoming feasible in many applications

Shahabi, Cyrus

65

CARBON SEQUESTRATION OF SURFACE MINE LANDS  

SciTech Connect

The January-March 2004 Quarter was dedicated to tree planting activities in two locations in Kentucky. During year one of this project there was no available mine land to plant in the Hazard area so 107 acres were planted in the Martin county mine location. This year 120 acres was planted in the Hazard area to compensate for the prior year and an additional 57 acres was planted on Peabody properties in western Kentucky. An additional set of special plots were established on each of these areas that contained 4800 seedlings each for special carbon sequestration determinations. Plantings were also conducted to continue compaction and water quality studies on two newly established areas as well as confirmed measurements on the first years plantings. Total plantings on this project now amount to 357 acres containing 245,960 tree seedlings.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2004-05-19T23:59:59.000Z

66

Carbon Sequestration on Surface Mine Lands  

Science Conference Proceedings (OSTI)

The first quarter of 2004 was dedicated to tree planting activities in two locations in Kentucky. During the first year of this project there was not available mine land to plant in the Hazard area, so 107 acres were planted in the Martin County mine location. This year 120 acres were planted in the Hazard area to compensate for the prior year and an additional 57 acres were planted on Peabody properties in western Kentucky. Additional sets of special plots were established on each of these areas that contained 4800 seedlings each for carbon sequestration demonstrations. Plantings were also conducted to continue compaction and water quality studies on the newly established areas as well as continual measurements of the first year's plantings. Total plantings on this project now amount to 357 acres containing 245,960 seedlings. During the second quarter of this year monitoring systems were established for all the new research areas. Weather data pertinent to the research as well as hydrology and water quality monitoring continues to be conducted on all areas. Studies established to assess specific questions pertaining to carbon flux and the invasion of the vegetation by small mammals are being quantified. Experimental practices initiated with this research project will eventually allow for the planting on long steep slopes with loose grading systems and allow mountain top removal areas to be constructed with loose spoil with no grading of the final layers of rooting material when establishing trees for the final land use designation. Monitoring systems have been installed to measure treatment effects on both above and below ground carbon and nitrogen pools in the planting areas. Soil and tissue samples were collected from both years planting and analyses were conducted in the laboratory. Examination of decomposition and heterotropic respiration on carbon cycling in the reforestation plots continued during the reporting period. Entire planted trees were extracted from the study area to evaluate carbon accumulation as a function of time on the mine sites. These trees were extracted and separated into the following components: foliage, stems, branches, and roots. Each component was evaluated to determine the contribution of each to the total sequestration value. The fourth quarter of the year was devoted to analyzing the first two years tree planting activities and the evaluation of the results. These analyses included the species success at each of the sites and quantifying the data for future year determination of research levels. Additional detailed studies have been planned to further quantify total carbon storage accumulation on the study areas. At least 124 acres of new plantings will be established in 2005 to bring the total to 500 acres or more in the study area across the state of Kentucky.

Donald H. Graves; Christopher Barton; Bon Jun Koo; Richard Sweigard; Richard Warner

2004-11-30T23:59:59.000Z

67

Incorporating Hydraulic Lift into a Land Surface Model and Its Effects on Surface Soil Moisture Prediction  

Science Conference Proceedings (OSTI)

In comparison with the Oklahoma Atmospheric Surface-layer Instrumentation System (OASIS) measurements, the Simulator for Hydrology and Energy Exchange at the Land Surface (SHEELS), a multilayer soil hydrological model, simulates a much faster ...

Diandong Ren; Ming Xue; Ann Henderson-Sellers

2004-12-01T23:59:59.000Z

68

CARBON SEQUESTRATION ON SURFACE MINE LANDS  

Science Conference Proceedings (OSTI)

The October-December 2003 Quarter was dedicated to analyzing the first years tree planting activities and evaluation of the results. This included the analyses of the species success at each of the sites and quantifying the baseline data for future year determination of research levels of mixes. The small mammal colonization study of revegetated surface mines was also initiated and sampling systems initiated.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2001-01-30T23:59:59.000Z

69

Prototyping a Generic, Unified Land Surface Classification and Screening Methodology for GPM-Era Microwave Land Precipitation Retrieval Algorithms  

Science Conference Proceedings (OSTI)

A prototype generic, unified land surface classification and screening methodology for Global Precipitation Measurement (GPM)-era microwave land precipitation retrieval algorithms by using ancillary datasets is developed. As an alternative to the ...

Arief Sudradjat; Nai-Yu Wang; Kaushik Gopalan; Ralph R. Ferraro

2011-06-01T23:59:59.000Z

70

CARBON SEQUESTRATION ON SURFACE MINE LANDS  

Science Conference Proceedings (OSTI)

The April-June 2004 quarter was dedicated to the establishment of monitoring systems for all the new research areas. Hydrology and water quality monitoring continues to be conducted on all areas as does weather data pertinent to the research. Studies assessing specific questions pertaining to carbon flux has been established and the invasion of the vegetation by small mammals is being quantified. The approval of two experimental practices associated with this research by the United States Office of Surface Mining was a major accomplishment during this period of time. These experimental practices will eventually allow for tree planting on long steep slopes with loose grading systems and for the use of loose dumped spoil on mountain top removal areas with no grading in the final layer of rooting material for tree establishment.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2004-08-02T23:59:59.000Z

71

Sensitivity of Tropical Convection to Land Surface Processes  

Science Conference Proceedings (OSTI)

This paper studies the sensitivity of large-scale tropical convection to land surface changes in the general circulation model of the LMD. Ale method of analysis is based on a conceptual model of the energetics of convection applied every day of ...

J. Polcher

1995-09-01T23:59:59.000Z

72

On the Nature of Soil Moisture in Land Surface Models  

Science Conference Proceedings (OSTI)

The soil moisture state simulated by a land surface model is a highly model-dependent quantity, meaning that the direct transfer of one model’s soil moisture into another can lead to a fundamental, and potentially detrimental, inconsistency. This ...

Randal D. Koster; Zhichang Guo; Rongqian Yang; Paul A. Dirmeyer; Kenneth Mitchell; Michael J. Puma

2009-08-01T23:59:59.000Z

73

Intercomparison of Soil Moisture Memory in Two Land Surface Models  

Science Conference Proceedings (OSTI)

A heavy rain or a dry period can produce an anomaly in soil moisture, and the dissipation of this anomaly may take weeks to months. It is important to understand how land surface models (LSMs) used with atmospheric general circulation models ...

Sarith P. P. Mahanama; Randal D. Koster

2003-12-01T23:59:59.000Z

74

Cabauw Data for the Validation of Land Surface Parameterization Schemes  

Science Conference Proceedings (OSTI)

This paper describes and interprets the 1987 data from Cabauw, the Netherlands, which can be used to test land surface schemes in stand-alone mode. The data are available from the authors for model development and research. It consists of half-...

Anton C. M. Beljaars; Fred C. Bosveld

1997-06-01T23:59:59.000Z

75

Carbon Sequestration on Surface Mine Lands  

Science Conference Proceedings (OSTI)

During this quarter a general forest monitoring program was conducted to measure treatment effects on above ground and below ground carbon C and Nitrogen (N) pools for the tree planting areas. Detailed studies to address specific questions pertaining to Carbon cycling was initiated with the development of plots to examine the influence of mycorrhizae, spoil chemical and mineralogical properties, and use of amendment on forest establishment and carbon sequestration. Efforts continued during this period to examine decomposition and heterotrophic respiration on C cycling in the reforestation plots. Projected climate change resulting from elevated atmospheric carbon dioxide has given rise to various strategies to sequester carbon in various terrestrial ecosystems. Reclaimed surface mine soils present one such potential carbon sink where traditional reclamation objectives can complement carbon sequestration. New plantings required the modification and design and installation on monitoring equipment. Maintenance and data monitoring on past and present installations are a continuing operation. The Department of Mining Engineering continued the collection of penetration resistance, penetration depth, and bulk density on both old and new treatment areas. Data processing and analysis is in process for these variables. Project scientists and graduate students continue to present results at scientific meetings, tours and field days presentations of the research areas are being conducted on a request basis.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2005-10-02T23:59:59.000Z

76

The Interplay between Transpiration and Runoff Formulations in Land Surface Schemes Used with Atmospheric Models  

Science Conference Proceedings (OSTI)

The Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) has shown that different land surface models (LSMs) driven by the same meteorological forcing can produce markedly different surface energy and water budgets, even ...

Randal D. Koster; P. C. D. Milly

1997-07-01T23:59:59.000Z

77

The Effect of Soil and Vegetation Parameters in the ECMWF Land Surface Scheme  

Science Conference Proceedings (OSTI)

Numerical Weather Prediction (NWP) and climate models are sensitive to evapotranspiration at the land surface. This sensitivity requires the prediction of realistic surface moisture and heat fluxes by land surface models that provide the lower ...

H. Richter; A. W. Western; F. H. S. Chiew

2004-12-01T23:59:59.000Z

78

Realistic Initialization of Land Surface States: Impacts on Subseasonal Forecast Skill  

Science Conference Proceedings (OSTI)

Forcing a land surface model (LSM) offline with realistic global fields of precipitation, radiation, and near-surface meteorology produces realistic fields (within the context of the LSM) of soil moisture, temperature, and other land surface ...

Randal D. Koster; Max J. Suarez; Ping Liu; Urszula Jambor; Aaron Berg; Michael Kistler; Rolf Reichle; Matthew Rodell; Jay Famiglietti

2004-12-01T23:59:59.000Z

79

The Land Surface Analysis in the NCEP Climate Forecast System Reanalysis  

Science Conference Proceedings (OSTI)

The NCEP Climate Forecast System Reanalysis (CFSR) uses the NASA Land Information System (LIS) to create its land surface analysis: the NCEP Global Land Data Assimilation System (GLDAS). Comparing to the previous two generations of NCEP global ...

Jesse Meng; Rongqian Yang; Helin Wei; Michael Ek; George Gayno; Pingping Xie; Kenneth Mitchell

2012-10-01T23:59:59.000Z

80

A Conjunctive Surface–Subsurface Flow Representation for Mesoscale Land Surface Models  

Science Conference Proceedings (OSTI)

Most current land surface models used in regional weather and climate studies capture soil-moisture transport in only the vertical direction and are therefore unable to capture the spatial variability of soil moisture and its lateral transport. ...

Hyun Il Choi; Xin-Zhong Liang; Praveen Kumar

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Modeling Land Surface Processes and Heavy Rainfall in Urban Environments: Sensitivity to Urban Surface Representations  

Science Conference Proceedings (OSTI)

High-resolution simulations with the Weather Research and Forecasting (WRF) model are used in conjunction with observational analyses to investigate land surface processes and heavy rainfall over the Baltimore-Washington metropolitan area. ...

Dan Li; Elie Bou-Zeid; Mary Lynn Baeck; Stephen Jessup; James A. Smith

82

Effects of Land Surface–Vegetation on the Boreal Summer Surface Climate of a GCM  

Science Conference Proceedings (OSTI)

A land surface model (LSM) has been included in the ECMWF Hamburg version 4 (ECHAM4) atmospheric general circulation model (AGCM). The LSM is an early version of the Organizing Carbon and Hydrology in Dynamic Ecosystems (ORCHIDEE) and it replaces ...

Andrea Alessandri; Silvio Gualdi; Jan Polcher; Antonio Navarra

2007-01-01T23:59:59.000Z

83

A Conjunctive Surface-Subsurface Flow Representation for Mesoscale Land Surface Models  

Science Conference Proceedings (OSTI)

Most current land surface models used in regional weather and climate studies capture soil-moisture transport in only the vertical direction and are therefore unable to capture the spatial variability of soil-moisture and its lateral transport. ...

Hyun Il Choi; Xin–Zhong Liang; Praveen Kumar

84

Global Interannual Variations in Sea Surface Temperature and Land Surface Vegetation, Air Temperature, and Precipitation  

Science Conference Proceedings (OSTI)

Anomalies in global vegetation greenness, SST, land surface air temperature, and precipitation exhibit linked, low-frequency interannual variations. These interannual variations were detected and analyzed for 1982–90 with a multivariate spectral ...

Sietse O. Los; G. James Collatz; Lahouari Bounoua; Piers J. Sellers; Compton J. Tucker

2001-04-01T23:59:59.000Z

85

Intercomparison Study of the Land Surface Process Model and the Common Land Model for a Prairie Wetland in Florida  

Science Conference Proceedings (OSTI)

Common Land Model (CLM) and Land Surface Process (LSP) model simulations are compared to measured values for a 13-day dry-down period with a rapidly decreasing near-surface water table for a marsh wetland community in Florida. LSP was able to ...

B. Whitfield; J. M. Jacobs; J. Judge

2006-12-01T23:59:59.000Z

86

Evaluation of Two Land Surface Schemes Used in Terrains of Increasing Aridity in West Africa  

Science Conference Proceedings (OSTI)

In this study different parameterizations for land surface models currently employed in meteorological models at ECMWF [Tiled ECMWF Surface Scheme for Exchange Processes over Land (TESSEL)] and NCEP (Noah) are evaluated for a semiarid region in ...

D. Schüttemeyer; A. F. Moene; A. A. M. Holtslag; H. A. R. de Bruin

2008-04-01T23:59:59.000Z

87

Verification and Intercomparison of Multimodel Simulated Land Surface Hydrological Datasets over the United States  

Science Conference Proceedings (OSTI)

Several land surface datasets, such as the observed Illinois soil moisture dataset; three retrospective offline run datasets from the Noah land surface model (LSM), Variable Infiltration Capacity (VIC) LSM, and Climate Prediction Center leaky ...

Yun Fan; Huug M. van den Dool; Wanru Wu

2011-08-01T23:59:59.000Z

88

An Observational Analysis and Evaluation of Land Surface Model Accuracy in the Nebraska Sand Hills  

Science Conference Proceedings (OSTI)

In this study, the influence of subsurface water on the energy budget components of three locations with heterogeneous land surfaces in the Nebraska Sand Hills are examined through observations and use of the Noah land surface model (LSM). ...

David B. Radell; Clinton M. Rowe

2008-08-01T23:59:59.000Z

89

Northern Annular Mode Effects on the Land Surface Phenologies of Northern Eurasia  

Science Conference Proceedings (OSTI)

Land surface phenology (LSP) is the spatiotemporal development of the vegetated land surface as revealed by synoptic sensors. Modeling LSP across northern Eurasia reveals the magnitude, significance, and spatial pattern of the influence of the ...

K. M. de Beurs; G. M. Henebry

2008-09-01T23:59:59.000Z

90

The Representation of Snow in Land Surface Schemes: Results from PILPS 2(d)  

Science Conference Proceedings (OSTI)

Twenty-one land surface schemes (LSSs) performed simulations forced by 18 yr of observed meteorological data from a grassland catchment at Valdai, Russia, as part of the Project for the Intercomparison of Land-Surface Parameterization Schemes (...

A. G. Slater; C. A. Schlosser; C. E. Desborough; A. J. Pitman; A. Henderson-Sellers; A. Robock; K. Ya Vinnikov; J. Entin; K. Mitchell; F. Chen; A. Boone; P. Etchevers; F. Habets; J. Noilhan; H. Braden; P. M. Cox; P. de Rosnay; R. E. Dickinson; Z-L. Yang; Y-J. Dai; Q. Zeng; Q. Duan; V. Koren; S. Schaake; N. Gedney; Ye M. Gusev; O. N. Nasonova; J. Kim; E. A. Kowalczyk; A. B. Shmakin; T. G. Smirnova; D. Verseghy; P. Wetzel; Y. Xue

2001-02-01T23:59:59.000Z

91

Relative Humidity as an Indicator for Cloud Formation over Heterogeneous Land Surfaces  

Science Conference Proceedings (OSTI)

The influence of land surface heterogeneity on potential cloud formation is investigated using relative humidity as an indicator. This is done by performing numerical experiments using a large-eddy simulation model (LES). The land surface in the ...

Chiel C. van Heerwaarden; Jordi Vilà Guerau de Arellano

2008-10-01T23:59:59.000Z

92

Limited-Area Model Sensitivity to the Complexity of Representation of the Land Surface Energy Balance  

Science Conference Proceedings (OSTI)

By coupling a multimode land surface scheme with a regional climate model, three scientific issues are addressed in this paper: (i) the regional model's sensitivity to the different levels of complexity presented by the land surface ...

H. Zhang; A. Henderson-Sellers; A. J. Pitman; C. E. Desborough; J. L. McGregor; J. J. Katzfey

2001-10-01T23:59:59.000Z

93

The Project for Intercomparison of Land Surface Parameterization Schemes (PILPS): Phases 2 and 3  

Science Conference Proceedings (OSTI)

The World Climate Research Programme Project for Intercomparison of Land Surface Parameterization Schemes (PILPS) is moving into its second and third phases that will exploit observational data and consider the performance of land surface schemes ...

A. Henderson-Sellers; A. J. Pitman; P. K. Love; P. Irannejad; T. H. Chen

1995-04-01T23:59:59.000Z

94

Simulation of Global Land Surface Conditions from 1948 to 2004. Part I: Forcing Data and Evaluations  

Science Conference Proceedings (OSTI)

Because of a lack of observations, historical simulations of land surface conditions using land surface models are needed for studying variability and changes in the continental water cycle and for providing initial conditions for seasonal ...

Taotao Qian; Aiguo Dai; Kevin E. Trenberth; Keith W. Oleson

2006-10-01T23:59:59.000Z

95

Land ecosystems cover nearly 30% of the Earth's surface. The land surface changes over days, seasons, decades, and longer. Vegetation  

E-Print Network (OSTI)

erupt. Activities of the growing human population cause or influence many of these changes. Terrestrial://hsb.gsfc.nasa.gov #12;Land Surface Observation Forcing ·Precipitation ·Wind ·Humidity ·Radiation ·Air Temperature ·Evapotranspiration ·Sensible Heat Flux ·Radiation ·Runoff ·Drainage Soil Moisture Snow, Ice, Rainfall Snow Vegetation

Li, Zhanqing

96

Development of a Coupled Land Surface Hydrologic Model and Evaluation at a Critical Zone Observatory  

Science Conference Proceedings (OSTI)

A fully-coupled land surface hydrologic model, Flux-PIHM, is developed by incorporating a land-surface scheme into the Penn State Integrated Hydrologic Model (PIHM). The land-surface scheme is adapted from the Noah LSM. Because PIHM is capable of ...

Yuning Shi; Kenneth J. Davis; Christopher J. Duffy; Xuan Yu

97

Effect of the surface on the secondary structure of soft landed peptide ions  

SciTech Connect

Ion soft landing (SL) enables highly selective modification of substrates for applications in materials science, nanotechnology and biology. Our previous study showed that SL can be used for preparation of conformation-selected peptide arrays. Here we present a first study of the effect of the surface on the secondary structures of peptides soft-landed onto self-assembled monolayer surfaces (SAMs). Conformations of soft-landed peptide ions were examined using the newly constructed instrument that enables in situ infrared reflection absorption spectroscopy (IRRAS) characterization of surfaces during and after ion deposition. Polyalanine peptides, Ac-AnK and Ac-KAn (n=7, 15), that have been extensively studied both in solution and in the gas phase were used as model systems in this study. We demonstrate that physical and chemical properties of SAM surfaces have a strong effect on the conformations of soft-landed peptides ions. For example, deposition of the ?-helical [Ac-A15K+H]+ ion on the CH3-terminated (HSAM) surface results in immobilization of both the ?- and 310-helical conformations. In contrast, a significant fraction of Ac-A15K molecules are present in the ?-sheet conformation on the CF3- (FSAM) and COOH-terminated (COOH-SAM) surfaces. We show that the kinetic energy of the polyalanine ion, the charge, and the initial conformation have only a minor effect on the conformation of deposited species suggesting that the interaction between the molecule and the surface plays a major role in determining the secondary structures of immobilized polyalanines. This study demonstrates that SL of mass-selected ions can be utilized for obtaining fundamental understanding of the intrinsic properties of biomolecules and surfaces responsible for conformational changes upon adsorption.

Hu, Qichi; Wang, Peng; Laskin, Julia

2010-10-01T23:59:59.000Z

98

Modeling land-surface/atmosphere dynamics for CHAMMP  

SciTech Connect

Project progress is described on a DOE CHAMP project to model the land-surface/atmosphere coupling in a heterogeneous environment. This work is a collaboration between scientists at Iowa State University and the University of New Hampshire. Work has proceeded in two areas: baseline model coupling and data base development for model validation. The core model elements (land model, atmosphere model) have been ported to the Principal Investigator's computing system and baseline coupling has commenced. The initial target data base is the set of observations from the FIFE field campaign, which is in the process of being acquired. For the remainder of the project period, additional data from the region surrounding the FIFE site and from other field campaigns will be acquired to determine how to best extrapolate results from the initial target region to the rest of the globe. In addition, variants of the coupled model will be used to perform experiments examining resolution requirements and coupling strategies for land-atmosphere coupling in a heterogeneous environment.

Gutowski, W.J. Jr.

1993-01-01T23:59:59.000Z

99

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

100

The Rhône-Aggregation Land Surface Scheme Intercomparison Project: An Overview  

Science Conference Proceedings (OSTI)

The Rhône-Aggregation (Rhône-AGG) Land Surface Scheme (LSS) intercomparison project is an initiative within the Global Energy and Water Cycle Experiment (GEWEX)/Global Land–Atmosphere System Study (GLASS) panel of the World Climate Research ...

A. Boone; F. Habets; J. Noilhan; D. Clark; P. Dirmeyer; S. Fox; Y. Gusev; I. Haddeland; R. Koster; D. Lohmann; S. Mahanama; K. Mitchell; O. Nasonova; G.-Y. Niu; A. Pitman; J. Polcher; A. B. Shmakin; K. Tanaka; B. van den Hurk; S. Vérant; D. Verseghy; P. Viterbo; Z.-L. Yang

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

The Land Surface Contribution to the Potential Predictability of Boreal Summer Season Climate  

Science Conference Proceedings (OSTI)

The role of the land surface in contributing to the potential predictability of the boreal summer climate is investigated with a coupled land–atmosphere climate model. Ensemble simulations for 1982–99 have been conducted with specified observed ...

Paul A. Dirmeyer

2005-10-01T23:59:59.000Z

102

Surface Engineering and Biological Interactions  

Science Conference Proceedings (OSTI)

Mar 1, 2011... the translational applications of hPSCs in regenerative medicine. ... Surface Free Energy Modification of Titania for Bioactive Surfaces: Kyle ...

103

Influences of biomass heat and biochemical energy storages on the land surface fluxes and radiative temperature  

SciTech Connect

We conducted observations and modeling at a forest site to assess importance of biomass heat and biochemical energy storages for land-atmosphere interactions. We used the terrestrial ecosystem Fluxes And Pools Integrated Simulator (FAPIS). We first examined FAPIS performance by testing its predictions with and without biomass energy storages against measurements of surface energy and CO2 fluxes. We then evaluated the magnitudes and temporal patterns of the calculated biomass energy storages. Effects of energy storages on flux exchanges and variations of radiative temperature were investigated by contrasting FAPIS simulations with and without the storages. We found that with the storages, FAPIS predictions agreed with measurements well; without them, FAPIS performance deteriorated for all surface energy fluxes. The biomass heat storage and biochemical energy storage had clear diurnal patterns with typical ranges from -50 to 50 and -3 to 20 Wm-2, respectively; these typical ranges were exceeded substantially when there were sudden changes in atmospheric conditions. Without-storage simulations produced larger sensible and latent heat fluxes during the day but smaller fluxes (more negative values) at night as compared with with-storage simulations. Similarly, without-storage simulations had higher surface radiative temperature during the day but lower radiative temperature at night, indicating that the biomass energy storages act to dampen diurnal temperature range. Therefore, biomass heat and biochemical energy storages are an integral and substantial part of the surface energy budget and play a role in modulating land surface temperatures and must be considered in studies of land - atmosphere interactions and climate modeling.

Gu, Lianhong [ORNL; Meyers, T. P. [NOAA ATDD; Pallardy, Stephen G. [University of Missouri; Hanson, Paul J [ORNL; Yang, Bai [ORNL; Heuer, Mark [ATDD, NOAA; Hosman, K. P. [University of Missouri; Liu, Qing [ORNL; Riggs, Jeffery S [ORNL; Sluss, Daniel Wayne [ORNL; Wullschleger, Stan D [ORNL

2007-01-01T23:59:59.000Z

104

Ecosystem Feedbacks to Climate Change in California: Development, Testing, and Analysis Using a Coupled Regional Atmosphere and Land Surface Model (WRF3–CLM3.5)  

Science Conference Proceedings (OSTI)

A regional atmosphere model [Weather Research and Forecasting model version 3 (WRF3)] and a land surface model [Community Land Model, version 3.5 (CLM3.5)] were coupled to study the interactions between the atmosphere and possible future ...

Z. M. Subin; W. J. Riley; J. Jin; D. S. Christianson; M. S. Torn; L. M. Kueppers

2011-05-01T23:59:59.000Z

105

Dependence of Land Surface Albedo on Solar Zenith Angle: Observations and Model Parameterization  

Science Conference Proceedings (OSTI)

This study examines the dependence of surface albedo on solar zenith angle (SZA) over snow-free land surfaces using the intensive observations of surface shortwave fluxes made by the U.S. Department of Energy Atmospheric Radiation Measurement (...

Fanglin Yang; Kenneth Mitchell; Yu-Tai Hou; Yongjiu Dai; Xubin Zeng; Zhuo Wang; Xin-Zhong Liang

2008-11-01T23:59:59.000Z

106

Retrieval of Land Surface Albedo from Satellite Observations: A Simulation Study  

Science Conference Proceedings (OSTI)

Land surface albedo is a critical parameter affecting the earth’s climate and is required by global and regional climatic modeling and surface energy balance monitoring. Surface albedo retrieved from satellite observations at one atmospheric ...

Shunlin Liang; Alan H. Strahler; Charles Walthall

1999-06-01T23:59:59.000Z

107

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

108

Land Surface Heterogeneity in the Cooperative Atmosphere Surface Exchange Study (CASES-97). Part I: Comparing Modeled Surface Flux Maps with Surface-Flux Tower and Aircraft Measurements  

Science Conference Proceedings (OSTI)

Land surface heterogeneity over an area of 71 km × 74 km in the lower Walnut River watershed, Kansas, was investigated using models and measurements from the 1997 Cooperative Atmosphere Surface Exchange Study (CASES-97) field experiment. As an ...

Fei Chen; David N. Yates; Haruyasu Nagai; Margaret A. LeMone; Kyoko Ikeda; Robert L. Grossman

2003-04-01T23:59:59.000Z

109

Dmplet Interaction with Hot Surfaces  

Science Conference Proceedings (OSTI)

... served at the NGP Technical Program Manager for ... contains a 10 mW, polarized Helium-Neon laser. ... with Hot Surfaces, NGP Annual Report, 1998. ...

2013-04-15T23:59:59.000Z

110

USING SURFACE PARTICLES TO INTERACT WITH COMPLEX EVERYDAY SURFACES  

E-Print Network (OSTI)

Tomorrow’s display and interaction technology will go beyond standard computer monitors, television and mobile screens and will enable projecting digital content onto any complex physical surface. While devices like the IPod and IPad have received tremendous commercial success, the interaction capabilities for users are still limited to a small mobile screen. As projectors continue to decrease in size, cost and power consumption, projection technology has the potential to become as ubiquitous as the standard television or digital cameras in our mobile devices. With this potential comes the opportunity to transform everyday passive objects into interactive display surfaces, freeing content from the confines of a flat monitor display. In this thesis, I explore interacting with everyday objects by representing content as interactive surface particles. Users can build their own physical world, map virtual content onto their physical construction and interact directly with surface using a stylus. While researchers have explored using projectors for interacting with surfaces in our environment, many of these displays are still relegated to walls, tabletop surfaces or simplistic scenes. Furthermore, even fewer research projects describe methods for content creation on complex physical objects. By using a surface particle representation, interaction designers can create programmed

Rajinder Singh Sodhi

2010-01-01T23:59:59.000Z

111

Cabauw Experimental Results from the Project for Intercomparison of Land-Surface Parameterization Schemes  

Science Conference Proceedings (OSTI)

In the Project for Intercomparison of Land-Surface Parameterization Schemes phase 2a experiment, meteorological data for the year 1987 from Cabauw, the Netherlands, were used as inputs to 23 land-surface flux schemes designed for use in climate ...

T. H. Chen; A. Henderson-Sellers; P. C. D. Milly; A. J. Pitman; A. C. M. Beljaars; J. Polcher; F. Abramopoulos; A. Boone; S. Chang; F. Chen; Y. Dai; C. E. Desborough; R. E. Dickinson; L. Dümenil; M. Ek; J. R. Garratt; N. Gedney; Y. M. Gusev; J. Kim; R. Koster; E. A. Kowalczyk; K. Laval; J. Lean; D. Lettenmaier; X. Liang; J.-F. Mahfouf; H.-T. Mengelkamp; K. Mitchell; O. N. Nasonova; J. Noilhan; A. Robock; C. Rosenzweig; J. Schaake; C. A. Schlosser; J.-P. Schulz; Y. Shao; A. B. Shmakin; D. L. Verseghy; P. Wetzel; E. F. Wood; Y. Xue; Z.-L. Yang; Q. Zeng

1997-06-01T23:59:59.000Z

112

Possible relation between land surface feedback and the post-landfall structure of monsoon depressions  

E-Print Network (OSTI)

Possible relation between land surface feedback and the post-landfall structure of monsoon; published 14 August 2009. [1] The effect of pre-storm land surface on the monsoon depressions (MDs (weaken) the landfalling MDs over the Indian monsoon region. Citation: Chang, H.-I., D. Niyogi, A. Kumar

Niyogi, Dev

113

Evaluating the JULES Land Surface Model Energy Fluxes Using FLUXNET Data  

Science Conference Proceedings (OSTI)

Surface energy flux measurements from a sample of 10 flux network (FLUXNET) sites selected to represent a range of climate conditions and biome types were used to assess the performance of the Hadley Centre land surface model (Joint U.K. Land ...

Eleanor Blyth; John Gash; Amanda Lloyd; Matthew Pryor; Graham P. Weedon; Jim Shuttleworth

2010-04-01T23:59:59.000Z

114

Assimilation of Satellite-Derived Skin Temperature Observations into Land Surface Models  

Science Conference Proceedings (OSTI)

Land surface (or “skin”) temperature (LST) lies at the heart of the surface energy balance and is a key variable in weather and climate models. In this research LST retrievals from the International Satellite Cloud Climatology Project (ISCCP) are ...

Rolf H. Reichle; Sujay V. Kumar; Sarith P. P. Mahanama; Randal D. Koster; Q. Liu

2010-10-01T23:59:59.000Z

115

Modeling the Effect of Land Surface Evaporation Variability on Precipitation Variability. Part I: General Response  

Science Conference Proceedings (OSTI)

This is the first of a two-part article that investigates the impact of land surface evaporation variability on the interannual variability of precipitation and compares it with the impact caused by sea surface temperature variability. Previous ...

Oreste Reale; Paul Dirmeyer

2002-08-01T23:59:59.000Z

116

Differing Trends in the Tropical Surface Temperatures and Precipitation over Land and Oceans  

Science Conference Proceedings (OSTI)

In the past 50 years, sea surface temperatures (SSTs) in the tropical latitudes have trended toward a warmer ocean state. As a response, tropical land surface temperatures, as well as tropical tropospheric temperatures (as manifested in the ...

Arun Kumar; Fanglin Yang; Lisa Goddard; Siegfried Schubert

2004-02-01T23:59:59.000Z

117

Explicit Representation of Subgrid Heterogeneity in a GCM Land Surface Scheme  

Science Conference Proceedings (OSTI)

A land surface scheme that may be run with or without a tiled representation of subgrid heterogeneity and includes an implicit atmospheric coupling scheme is described. Simulated average surface air temperatures and diurnal temperature ranges in ...

R. L. H. Essery; M. J. Best; R. A. Betts; P. M. Cox; C. M. Taylor

2003-06-01T23:59:59.000Z

118

Improvements to NOAA’s Historical Merged Land–Ocean Surface Temperature Analysis (1880–2006)  

Science Conference Proceedings (OSTI)

Observations of sea surface and land–near-surface merged temperature anomalies are used to monitor climate variations and to evaluate climate simulations; therefore, it is important to make analyses of these data as accurate as possible. Analysis ...

Thomas M. Smith; Richard W. Reynolds; Thomas C. Peterson; Jay Lawrimore

2008-05-01T23:59:59.000Z

119

An Empirical Latent Heat Flux Parameterization for the Noah Land Surface Model  

Science Conference Proceedings (OSTI)

Proper partitioning of the surface energy fluxes that drive the evolution of the planetary boundary layer in numerical weather prediction models requires an accurate representation of initial land surface conditions. Unfortunately, soil ...

Christopher M. Godfrey; David J. Stensrud

2010-08-01T23:59:59.000Z

120

Numerical Simulation of Nonlinear Mesoscale Circulations Induced by the Thermal Heterogeneities of Land Surface  

Science Conference Proceedings (OSTI)

Mesoscale circulations forced by a random distribution of surface sensible heat flux have been investigated using a three-dimensional numerical model. The complex land surface is modeled as a homogeneous random field characterized by a spectral ...

Jingfeng Wang; Elfatih A. B. Eltahir; Rafael L. Bras

1998-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

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

122

Role of Antecedent Land Surface Conditions on North American Monsoon Rainfall Variability  

Science Conference Proceedings (OSTI)

Possible links between North American Monsoon System (NAMS) seasonal [June–July–August–September (JJAS)] precipitation and premonsoon seasonal land surface conditions including precipitation (P), surface air temperature (Ts), soil moisture (Sm), ...

Chunmei Zhu; Dennis P. Lettenmaier; Tereza Cavazos

2005-08-01T23:59:59.000Z

123

Development of a Land Surface Model. Part I: Application in a Mesoscale Meteorological Model  

Science Conference Proceedings (OSTI)

Parameterization of land surface processes and consideration of surface inhomogeneities are very important to mesoscale meteorological modeling applications, especially those that provide information for air quality modeling. To provide crucial, ...

Aijun Xiu; Jonathan E. Pleim

2001-02-01T23:59:59.000Z

124

Performance Assessment of New Land Surface and Planetary Boundary Layer Physics in the WRF-ARW  

Science Conference Proceedings (OSTI)

The Pleim–Xiu land surface model, Pleim surface layer scheme, and Asymmetric Convective Model (version 2) are now options in version 3.0 of the Weather Research and Forecasting model (WRF) Advanced Research WRF (ARW) core. These physics ...

Robert C. Gilliam; Jonathan E. Pleim

2010-04-01T23:59:59.000Z

125

Role of Antecedent Land Surface Conditions in Warm Season Precipitation over Northwestern Mexico  

Science Conference Proceedings (OSTI)

The role of antecedent land surface conditions including precipitation (P), surface skin temperature (Ts), soil moisture (Sm), and snow water equivalent (SWE) anomalies on the onset and intensity of the monsoon during the 1950–99 period in the ...

Chunmei Zhu; Tereza Cavazos; Dennis P. Lettenmaier

2007-05-01T23:59:59.000Z

126

Land surface cleanup of plutonium at the Nevada Test Site  

SciTech Connect

The Nevada Test Site (NTS) covers approximately 3300 km{sup 2} of high desert and is located approximately 100 km northwest of Las Vegas, Nevada. Soil contaminated by plutonium exists on the NTS and surrounding areas from safety tests conducted in the 1950s and 1960s. About 150 curies of contamination have been measured over 1200 hectares of land surface. Most contamination is found in the top 5 cm of soil but may be found deep as 25 cm. The cost of conventional removal and disposal of the full soil volume has been estimated at over $500,000,000. This study is directed toward minimizing the volume of waste which must be further processed and disposed of by precisely controlling soil removal depth. The following soil removal machines were demonstrated at the NTS: (1) a CMI Corporation Model PR-500FL pavement profiler, (2) a CMI Corporation Model Tr-225B trimmer reclaimer, (3) a Caterpillar Model 623 elevating scraper equipped with laser depth control, (4) a Caterpillar Model 14G motor grader equipped with laser depth control, (5) a Caterpillar Model 637 auger scraper, and (6) a XCR Series Guzzler vacuum truck. 5 refs., 5 figs.

Ebeling, L.L.; Evans, R.B.; Walsh, E.J.

1991-01-01T23:59:59.000Z

127

Revisiting GLACE: Understanding the Role of the Land Surface in Land–Atmosphere Coupling  

Science Conference Proceedings (OSTI)

The Global Land–Atmosphere Coupling Experiment (GLACE) established a method for quantifying and comparing the influence of soil moisture on the atmosphere in AGCMs. The models included in the GLACE intercomparison displayed a wide range in the ...

Ruth E. Comer; Martin J. Best

2012-12-01T23:59:59.000Z

128

Interactions among bioenergy feedstock choices, landscape dynamics, and land use  

SciTech Connect

Landscape implications of bioenergy feedstock choices are significant and depend on land-use practices and their environmental impacts. Although land-use changes and carbon emissions associated with bioenergy feedstock production are dynamic and complicated, lignocellulosic feedstocks may offer opportunities that enhance sustainability when compared to other transportation fuel alternatives. For bioenergy sustainability, major drivers and concerns revolve around energy security, food production, land productivity, soil carbon and erosion, greenhouse gas emissions, biodiversity, air quality, and water quantity and quality. The many implications of bioenergy feedstock choices require several indicators at multiple scales to provide a more complete accounting of effects. Ultimately, the long-term sustainability of bioenergy feedstock resources (as well as food supplies) throughout the world depends on land-use practices and landscape dynamics. Land-management decisions often invoke trade-offs among potential environmental effects and social and economic factors as well as future opportunities for resource use. The hypothesis being addressed in this paper is that sustainability of bioenergy feedstock production can be achieved via appropriately designed crop residue and perennial lignocellulosic systems. We find that decision makers need scientific advancements and adequate data that both provide quantitative and qualitative measures of the effects of bioenergy feedstock choices at different spatial and temporal scales and allow fair comparisons among available options for renewable liquid fuels.

Dale, Virginia H [ORNL; Kline, Keith L [ORNL; Wright, Lynn L [ORNL; Perlack, Robert D [ORNL; Downing, Mark [ORNL; Graham, Robin Lambert [ORNL

2011-01-01T23:59:59.000Z

129

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

130

Evolving land-atmosphere interactions over North America from CMIP5 simulations  

Science Conference Proceedings (OSTI)

Long-term changes in land-atmosphere interactions during spring and summer are examined over North America. A suite of models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) simulating pre-industrial, historical and severe future ...

Paul A. Dirmeyer; Yan Jin; Bohar Singh; Xiaoqin Yan

131

Evolving Land–Atmosphere Interactions over North America from CMIP5 Simulations  

Science Conference Proceedings (OSTI)

Long-term changes in land–atmosphere interactions during spring and summer are examined over North America. A suite of models from phase 5 of the Coupled Model Intercomparison Project simulating preindustrial, historical, and severe future climate ...

Paul A. Dirmeyer; Yan Jin; Bohar Singh; Xiaoqin Yan

2013-10-01T23:59:59.000Z

132

Anisotropy of Land Surface Skin Temperature Derived from Satellite Data  

Science Conference Proceedings (OSTI)

The land skin temperature, an important feature for agricultural monitoring, convective processes, and the earth’s radiation budget, is monitored from limited-view satellite imagers. The angular dependence of this parameter is examined using ...

Patrick Minnis; Mandana M. Khaiyer

2000-07-01T23:59:59.000Z

133

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

134

Temporal Variations of Land Surface Microwave Emissivities over the Atmospheric Radiation Measurement Program Southern Great Plains Site  

Science Conference Proceedings (OSTI)

Land surface microwave emissivities are important geophysical parameters for atmospheric, hydrological, and biospheric studies. This study estimates land surface microwave emissivity using an atmospheric microwave radiative transfer model and a ...

Bing Lin; Patrick Minnis

2000-07-01T23:59:59.000Z

135

Influence of Land Surface Roughness on Atmospheric Circulation and Precipitation: A Sensitivity Study with a General Circulation Model  

Science Conference Proceedings (OSTI)

The influence of land surface roughness on the large scale atmospheric circulation and rainfall was examined by comparing three sets of simulations made with a general circulation model in which the land surface roughness length, z0, was reduced ...

Y. C. Sud; J. Shukla; Y. Mintz

1988-09-01T23:59:59.000Z

136

Global Retrospective Estimation of Soil Moisture Using the Variable Infiltration Capacity Land Surface Model, 1980–93  

Science Conference Proceedings (OSTI)

A daily set of surface meteorological forcings, model-derived surface moisture fluxes, and state variables for global land areas for the period of 1979–93 is described. The forcing dataset facilitates global simulations and evaluation of land ...

Bart Nijssen; Reiner Schnur; Dennis P. Lettenmaier

2001-04-01T23:59:59.000Z

137

The Anomalous Rainfall over the United States during July 1993: Sensitivity to Land Surface Parameterization and Soil Moisture Anomalies  

Science Conference Proceedings (OSTI)

This paper discusses the sensitivity of short- and medium-range precipitation forecasts for the central United States to land surface parametrization and soil moisture anomalies. Two forecast systems with different land surface and boundary layer ...

Anton C. M. Beljaars; Pedro Viterbo; Martin J. Miller; Alan K. Betts

1996-03-01T23:59:59.000Z

138

Global Fields of Soil Moisture and Land Surface Evapotranspiration Derived from Observed Precipitation and Surface Air Temperature  

Science Conference Proceedings (OSTI)

The global fields of normal monthly soil moisture and land surface evapotranspiration are derived with a simple water budget model that has precipitation and potential evapotranspiration as inputs. The precipitation is observed and the potential ...

Y. Mintz; G. K. Walker

1993-08-01T23:59:59.000Z

139

Relationships among Remotely Sensed Data, Surface Energy Balance, and Area-Averaged Fluxes over Partially Vegetated Land Surfaces  

Science Conference Proceedings (OSTI)

Numerous recent field experiments have examined the use of remote sensing to estimate land surface fluxes of latent and sensible heat using combinations of thermal, visible, and near-infrared data. While substantial progress has been made, ...

M. A. Friedl

1996-11-01T23:59:59.000Z

140

Sensitivity of Latent Heat Flux from PILPS Land-Surface Schemes to Perturbations of Surface Air Temperature  

Science Conference Proceedings (OSTI)

In the PILPS Phase 2a experiment, 23 land-surface schemes were compared in an off-line control experiment using observed meteorological data from Cabauw, the Netherlands. Two simple sensitivity experiments were also undertaken in which the ...

Weiqing Qu; A. Henderson-Sellers; A. J. Pitman; T. H. Chen; F. Abramopoulos; A. Boone; S. Chang; F. Chen; Y. Dai; R. E. Dickinson; L. Dümenil; M. Ek; N. Gedney; Y. M. Gusev; J. Kim; R. Koster; E. A. Kowalczyk; J. Lean; D. Lettenmaier; X. Liang; J.-F. Mahfouf; H.-T. Mengelkamp; K. Mitchell; O. N. Nasonova; J. Noilhan; A. Robock; C. Rosenzweig; J. Schaake; C. A. Schlosser; J.-P. Schulz; A. B. Shmakin; D. L. Verseghy; P. Wetzel; E. F. Wood; Z.-L. Yang; Q. Zeng

1998-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Human-automation interaction for lunar landing aimpoint redesignation  

E-Print Network (OSTI)

Human-automation interactions are a critical area of research in systems with modem automation. The decision-making portion of tasks presents a special challenge for human-automation interactions because of the many factors ...

Needham, Jennifer M

2008-01-01T23:59:59.000Z

142

Land Surface Heterogeneity in the Cooperative Atmosphere Surface Exchange Study (CASES-97). Part II: Analysis of Spatial Heterogeneity and Its Scaling  

Science Conference Proceedings (OSTI)

Multiscale atmospheric forcing data at 1-, 5-, and 10-km scales from the 1997 Cooperative Atmosphere Surface Exchange Study (CASES-97) were used to drive three uncoupled land surface models: the National Center for Atmospheric Research Land ...

David N. Yates; Fei Chen; Haruyasu Nagai

2003-04-01T23:59:59.000Z

143

The CCSM4 Land Simulation, 1850–2005: Assessment of Surface Climate and New Capabilities  

Science Conference Proceedings (OSTI)

This paper reviews developments for the Community Land Model, version 4 (CLM4), examines the land surface climate simulation of the Community Climate System Model, version 4 (CCSM4) compared to CCSM3, and assesses new earth system features of CLM4 ...

David M. Lawrence; Keith W. Oleson; Mark G. Flanner; Christopher G. Fletcher; Peter J. Lawrence; Samuel Levis; Sean C. Swenson; Gordon B. Bonan

2012-04-01T23:59:59.000Z

144

Maximum Surface Albedo of Seasonally Snow-Covered Lands in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

Areally weighted clear sky surface albedo of snow-covered land in the middle and high latitudes of the Northern Hemisphere was measured from satellite imagery in A 1×1° latitude-longitude cells. The study area included 87% of the land polewards ...

David A. Robinson; George Kukla

1985-05-01T23:59:59.000Z

145

An Evaluation with the Fourier Amplitude Sensitivity Test (FAST) of Which Land-Surface Parameters Are of Greatest Importance in Atmospheric Modeling  

Science Conference Proceedings (OSTI)

Land-surface parameterizations based on a statistical-dynamical approach have been suggested recently to improve the representation of the surface forcing from heterogeneous land in atmospheric models. With this approach, land-surface ...

Dan C. Collins; Roni Avissar

1994-05-01T23:59:59.000Z

146

Patterns of Land Surface Errors and Biases in the Global Forecast System  

Science Conference Proceedings (OSTI)

One year’s worth of Global Forecast System (GFS) predictions of surface meteorological variables (wind speed, air temperature, dewpoint temperature, sea level pressure) are validated for land-based stations over the entire planet for forecasts ...

David Werth; Alfred Garrett

2011-05-01T23:59:59.000Z

147

The Role of the Land Surface Background State in Climate Predictability  

Science Conference Proceedings (OSTI)

Skill in ensemble-mean dynamical seasonal climate hindcasts with a coupled land–atmosphere model and specified observed sea surface temperature is compared to that for long multidecade integrations of the same model where the initial conditions ...

Paul A. Dirmeyer

2003-06-01T23:59:59.000Z

148

A Comparison of the Noah and OSU Land Surface Models in the ECPC Seasonal Forecast Model  

Science Conference Proceedings (OSTI)

The Noah land surface model (LSM) has recently been implemented into the Experimental Climate Prediction Center’s (ECPC’s) global Seasonal Forecast Model (SFM). Its performance is compared to the older ECPC SFM with the Oregon State University (...

Laurel L. De Haan; Masao Kanamitsu; Cheng-Hsuan Lu; John O. Roads

2007-10-01T23:59:59.000Z

149

Assimilation of Satellite-Observed Snow Albedo in a Land Surface Model  

Science Conference Proceedings (OSTI)

This study assesses the impact of assimilating satellite-observed snow albedo on the Noah land surface model (LSM)-simulated fluxes and snow properties. A direct insertion technique is developed to assimilate snow albedo into Noah and is applied ...

M. Jahanzeb Malik; Rogier van der Velde; Zoltan Vekerdy; Zhongbo Su

2012-06-01T23:59:59.000Z

150

Evaluation and Transferability of the Noah Land Surface Model in Semiarid Environments  

Science Conference Proceedings (OSTI)

This paper investigates the performance of the National Centers for Environmental Prediction (NCEP) Noah land surface model at two semiarid sites in southern Arizona. The goal is to evaluate the transferability of calibrated parameters (i.e., ...

Terri S. Hogue; Luis Bastidas; Hoshin Gupta; Soroosh Sorooshian; Ken Mitchell; William Emmerich

2005-02-01T23:59:59.000Z

151

Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation  

Science Conference Proceedings (OSTI)

The decadal covariability of northern wintertime land surface temperature and 500-hPa geopotential anomalies is examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research and the Twentieth-Century ...

B. Yu; X. L. Wang; X. B. Zhang; J. Cole; Y. Feng

2014-01-01T23:59:59.000Z

152

Evaluation of Satellite Estimates of Land Surface Temperature from GOES over the United States  

Science Conference Proceedings (OSTI)

A comprehensive evaluation of split-window and triple-window algorithms to estimate land surface temperature (LST) from Geostationary Operational Environmental Satellites (GOES) that were previously described by Sun and Pinker is presented. The ...

Rachel T. Pinker; Donglian Sun; Meng-Pai Hung; Chuan Li; Jeffrey B. Basara

2009-01-01T23:59:59.000Z

153

Assessing the Performance of the Ensemble Kalman Filter for Land Surface Data Assimilation  

Science Conference Proceedings (OSTI)

The ensemble Kalman filter provides an easy-to-use, flexible, and efficient option for data assimilation problems. One of its attractive features in land surface applications is its ability to provide distributional information about variables, ...

Yuhua Zhou; Dennis McLaughlin; Dara Entekhabi

2006-08-01T23:59:59.000Z

154

Computational Issues for Large-Scale Land Surface Data Assimilation Problems  

Science Conference Proceedings (OSTI)

Land surface data assimilation problems are often limited by the high dimensionality of states created by spatial discretization over large high-resolution computational grids. Yet field observations and simulation both confirm that soil moisture ...

Dennis McLaughlin; Yuhua Zhou; Dara Entekhabi; Virat Chatdarong

2006-06-01T23:59:59.000Z

155

A Stochastic Linear Theory of Mesoscale Circulation Induced by the Thermal Heterogeneity of the Land Surface  

Science Conference Proceedings (OSTI)

This paper presents a three-dimensional stochastic linear model of the mesoscale circulation induced by the variability of turbulent sensible heat flux over land surface. The primitive equations relating wind field, geo-potential, and potential ...

Jingfeng Wang; Rafael L. Bars; Elfatih A. B. Eltahir

1996-11-01T23:59:59.000Z

156

A Factorial Assessment of the Sensitivity of the BATS Land-Surface Parameterization Scheme  

Science Conference Proceedings (OSTI)

Land-surface schemes developed for incorporation into global climate models include parameterizations that are not yet fully validated and depend upon the specification of a large (20–50) number of ecological and soil parameters, the values of ...

A. Henderson-Sellers

1993-02-01T23:59:59.000Z

157

The Predictive Uncertainty of Land Surface Fluxes in Response to Increasing Ambient Carbon Dioxide  

Science Conference Proceedings (OSTI)

The exchange of water vapor and carbon dioxide (CO2) between the land surface and the atmosphere plays an important role in numerical weather forecasting and climate change prediction using general circulation models. In this study, a typical ...

Karsten Schulz; Andrew Jarvis; Keith Beven; Henrik Soegaard

2001-06-01T23:59:59.000Z

158

The Implementation and Validation of Improved Land-Surface Hydrology in an Atmospheric General Circulation Model  

Science Conference Proceedings (OSTI)

New land-surface hydrologic parameterizations are implemented into the NASA Goddard Institute for Space Studies (GISS) General Circulation Model (GCM). These parameterizations are: 1) runoff and evapotranspiration functions that include the ...

Kevin D. Johnson; Dara Entekhabi; Peter S. Eagleson

1993-06-01T23:59:59.000Z

159

Biogeochemical and Biophysical Responses of the Land Surface to a Sustained Thermohaline Circulation Weakening  

Science Conference Proceedings (OSTI)

Biotic responses to climate change may constitute significant feedbacks to the climate system by altering biogeochemistry (e.g., carbon storage) or biophysics (i.e., albedo, evapotranspiration, and roughness length) at the land surface. Accurate ...

Paul A. T. Higgins

2004-11-01T23:59:59.000Z

160

An Improved Snow Scheme for the ECMWF Land Surface Model: Description and Offline Validation  

Science Conference Proceedings (OSTI)

A new snow scheme for the European Centre for Medium-Range Weather Forecasts (ECMWF) land surface model has been tested and validated. The scheme includes a new parameterization of snow density, incorporating a liquid water reservoir, and revised ...

Emanuel Dutra; Gianpaolo Balsamo; Pedro Viterbo; Pedro M. A. Miranda; Anton Beljaars; Christoph Schär; Kelly Elder

2010-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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.


161

A Revised Land Surface Parameterization (SiB2) for Atmospheric GCMS. Part I: Model Formulation  

Science Conference Proceedings (OSTI)

The formulation of a revised land surface parameterization for use within atmospheric general circulation models (GCMs) is presented. The model (SiB2) incorporates several significant improvements over the first version of the Simple Biosphere ...

P.J. Sellers; D.A. Randall; G.J. Collatz; J.A. Berry; C.B. Field; D.A. Dazlich; C. Zhang; G.D. Collelo; L. Bounoua

1996-04-01T23:59:59.000Z

162

Use of NDVI and Land Surface Temperature for Drought Assessment: Merits and Limitations  

Science Conference Proceedings (OSTI)

A large number of water- and climate-related applications, such as drought monitoring, are based on spaceborne-derived relationships between land surface temperature (LST) and the normalized difference vegetation index (NDVI). The majority of ...

Arnon Karnieli; Nurit Agam; Rachel T. Pinker; Martha Anderson; Marc L. Imhoff; Garik G. Gutman; Natalya Panov; Alexander Goldberg

2010-02-01T23:59:59.000Z

163

Estimation of Land Surface Temperature over the Tibetan Plateau Using GMS Data  

Science Conference Proceedings (OSTI)

Geostationary Meteorological Satellite Visible/Infrared Spin-Scan Radiometer (GMS VISSR) images have been used to estimate diurnal variations of land surface temperature distributions over the Tibetan Plateau. The infrared split-window algorithm ...

Yuichiro Oku; Hirohiko Ishikawa

2004-04-01T23:59:59.000Z

164

Influence of “Realistic” Land Surface Wetness on Predictability of Seasonal Precipitation in Boreal Summer  

Science Conference Proceedings (OSTI)

Outputs from two ensembles of atmospheric model simulations for 1951–98 define the influence of “realistic” land surface wetness on seasonal precipitation predictability in boreal summer. The ensembles consist of one forced with observed sea ...

Shinjiro Kanae; Yukiko Hirabayashi; Tomohito Yamada; Taikan Oki

2006-04-01T23:59:59.000Z

165

Updating a Land Surface Model with MODIS-Derived Snow Cover  

Science Conference Proceedings (OSTI)

A simple scheme for updating snow-water storage in a land surface model using snow cover observations is presented. The scheme makes use of snow cover observations retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard ...

M. Rodell; P. R. Houser

2004-12-01T23:59:59.000Z

166

Quantifying Land Surface Temperature Variability for Two Sahelian Mesoscale Regions during the Wet Season  

Science Conference Proceedings (OSTI)

Land–atmosphere feedbacks play an important role in the weather and climate of many semiarid regions. These feedbacks are strongly controlled by how the surface responds to precipitation events, which regulate the return of heat and moisture to ...

Martin G. De Kauwe; Christopher M. Taylor; Philip P. Harris; Graham P. Weedon; Richard. J. Ellis

2013-10-01T23:59:59.000Z

167

Multi-sensor large scale land surface data assimilation using ensemble approaches  

E-Print Network (OSTI)

One of the ensemble Kalman filter's (EnKF) attractive features in land surface applications is its ability to provide distributional information. The EnKF relies on normality approximations that improve its efficiency but ...

Zhou, Yuhua, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

168

Mesoscale Simulations of the Land Surface Effects of Historical Logging in a Moist Continental Climate Regime  

Science Conference Proceedings (OSTI)

An enhanced knowledge of the feedbacks from land surface changes on regional climates is of great importance in the attribution of climate change. To explore the effects of deforestation on a midlatitude climate regime, two sets of two five-...

Nicholas P. Klingaman; Jason Butke; Daniel J. Leathers; Kevin R. Brinson; Elsa Nickl

2008-08-01T23:59:59.000Z

169

Sensitivity of Global Tropical Climate to Land Surface Processes: Mean State and Interannual Variability  

Science Conference Proceedings (OSTI)

This study examines the sensitivity of the global climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on ...

Hsi-Yen Ma; Heng Xiao; C. Roberto Mechoso; Yongkang Xue

2013-03-01T23:59:59.000Z

170

Sensitivity of a GCM Simulation of Global Climate to the Representation of Land-Surface Hydrology  

Science Conference Proceedings (OSTI)

The sensitivity of global climate to the characterization of the land-surface hydrology is investigated using the Geophysical Fluid Dynamics Laboratory GCM at R15 resolution with the standard Budyko bucket and the Variable Infiltration Capacity (...

John F. Stamm; Eric F. Wood; Dennis P. Lettenmaier

1994-08-01T23:59:59.000Z

171

Calibrating a Land Surface Model of Varying Complexity Using Multicriteria Methods and the Cabauw Dataset  

Science Conference Proceedings (OSTI)

The multicriteria methodology, which provides a means to estimate optimal ranges for land surface model parameter values via calibration, is evaluated. Following calibration, differences between schemes resulting from effective parameter values ...

Y. Xia; A. J. Pitman; H. V. Gupta; M. Leplastrier; A. Henderson-Sellers; L. A. Bastidas

2002-04-01T23:59:59.000Z

172

Simultaneous Land Surface Temperature–Emissivity Retrieval in the Infrared Split Window  

Science Conference Proceedings (OSTI)

A combined land surface temperature–emissivity retrieval algorithm is developed and tested for Geostationary Operational Environmental Satellite (GOES)-Imager and National Oceanic and Atmospheric Administration Advanced Very High Resolution ...

David A. Faysash; Eric A. Smith

1999-11-01T23:59:59.000Z

173

The Relationship between Land–Ocean Surface Temperature Contrast and Radiative Forcing  

Science Conference Proceedings (OSTI)

Previous work has demonstrated that observed and modeled climates show a near-time-invariant ratio of mean land to mean ocean surface temperature change under transient and equilibrium global warming. This study confirms this in a range of ...

F. Hugo Lambert; Mark J. Webb; Manoj M. Joshi

2011-07-01T23:59:59.000Z

174

Modeling the Impact of Land Surface Degradation on the Climate of Tropical North Africa  

Science Conference Proceedings (OSTI)

Degradation of the land surface has been suggested as a cause of persistent drought in tropical north Africa. A general circulation model is used to assess the impact of degradation of five regions within tropical north Africa. Idealized ...

Douglas B. Clark; Yongkang Xue; Richard J. Harding; Paul J. Valdes

2001-04-01T23:59:59.000Z

175

Evaluation of MERRA Land Surface Estimates in Preparation for the Soil Moisture Active Passive Mission  

Science Conference Proceedings (OSTI)

The authors evaluated several land surface variables from the Modern-Era Retrospective Analysis for Research and Applications (MERRA) product that are important for global ecological and hydrological studies, including daily maximum (Tmax) and ...

Yonghong Yi; John S. Kimball; Lucas A. Jones; Rolf H. Reichle; Kyle C. McDonald

2011-08-01T23:59:59.000Z

176

Using the Special Sensor Microwave/Imager to Monitor Land Surface Temperatures, Wetness, and Snow Cover  

Science Conference Proceedings (OSTI)

The worldwide network of in situ land surface temperatures archived in near-real time at the National Climatic Data Center (NCDC) has limited applications, since many areas are poorly represented or provide no observations. Satellite measurements ...

Alan Basist; Norman C. Grody; Thomas C. Peterson; Claude N. Williams

1998-09-01T23:59:59.000Z

177

Monthly Mean Diurnal Cycles in Surface Temperatures over Land for Global Climate Studies  

Science Conference Proceedings (OSTI)

Monthly mean diurnal cycles (MDCs) of surface temperatures over land, represented in 3-h universal time intervals, have been analyzed. Satellite near-global data from the International Satellite Cloud Climatology Project (ISCCP) with a (280 km)2 ...

Alexander Ignatov; Garik Gutman

1999-07-01T23:59:59.000Z

178

A Modeling and Observational Framework for Diagnosing Local Land–Atmosphere Coupling on Diurnal Time Scales  

Science Conference Proceedings (OSTI)

Land–atmosphere interactions play a critical role in determining the diurnal evolution of both planetary boundary layer (PBL) and land surface temperature and moisture states. The degree of coupling between the land surface and PBL in numerical ...

Joseph A. Santanello Jr.; Christa D. Peters-Lidard; Sujay V. Kumar; Charles Alonge; Wei-Kuo Tao

2009-06-01T23:59:59.000Z

179

Near-Surface and Land Surface Forecast System of the Vancouver 2010 Winter Olympic and Paralympic Games  

Science Conference Proceedings (OSTI)

A high-resolution 2D near-surface and land surface model was developed to produce snow and temperature forecasts over the complex alpine region of the Vancouver 2010 Winter Olympic and Paralympic Games. The model is driven by downscaled ...

Natacha B. Bernier; Stéphane Bélair; Bernard Bilodeau; Linying Tong

2011-08-01T23:59:59.000Z

180

Forward-Looking Assimilation of MODIS-Derived Snow-Covered Area into a Land Surface Model  

Science Conference Proceedings (OSTI)

Snow cover over land has a significant impact on the surface radiation budget, turbulent energy fluxes to the atmosphere, and local hydrological fluxes. For this reason, inaccuracies in the representation of snow-covered area (SCA) within a land ...

Benjamin F. Zaitchik; Matthew Rodell

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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.


181

Multimodel Analysis of Energy and Water Fluxes: Intercomparisons between Operational Analyses, a Land Surface Model, and Remote Sensing  

Science Conference Proceedings (OSTI)

Using data from seven global model operational analyses (OA), one land surface model, and various remote sensing retrievals, the energy and water fluxes over global land areas are intercompared for 2003/04. Remote sensing estimates of ...

Raghuveer K. Vinukollu; Justin Sheffield; Eric F. Wood; Michael G. Bosilovich; David Mocko

2012-02-01T23:59:59.000Z

182

Impact of Land Surface Initialisation Approach on Sub–seasonal Forecast Skill: A Regional Analysis in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

We use a sophisticated coupled land–atmosphere modelling system for a Southern Hemisphere sub–domain centred over South East Australia to evaluate differences in simulation skill from two different land surface initialisation approaches. The first ...

Annette L. Hirsch; Jatin Kala; Andy J. Pitman; Claire Carouge; Jason P. Evans; Vanessa Haverd; David Mocko

183

Principal Components of Multi-Frequency Microwave Land Surface Emissivities. Part 1: Estimation Under Clear and Precipitating Conditions  

Science Conference Proceedings (OSTI)

The upcoming Global Precipitation Measurement (GPM) mission will provide considerably more over-land observations over complex terrain, high elevation river basins and cold surfaces, necessitating an improved assessment of the microwave land ...

F. Joseph Turk; Ziad S. Haddad; Yalei You

184

Area-Averaged Surface Fluxes in a Semiarid Region with Partly Irrigated Land: Lessons Learned from EFEDA  

Science Conference Proceedings (OSTI)

The European Field Experiment in a Desertification-Threatened Area (EFEDA) provides a comprehensive land surface dataset for a semiarid Mediterranean environment with natural vegetation and cultivated dry and irrigated land. This paper discusses ...

M. Anna Osann Jochum; Hendrik A. R. de Bruin; Albert A. M. Holtslag; Alfonso Calera Belmonte

2006-06-01T23:59:59.000Z

185

The effect of land surface changes on Eemian climate  

Science Conference Proceedings (OSTI)

surface albedo, an increase of the amount of absorbed solar radiation and thereby ... more comprehensive representation of weather and climate than given by ...

186

The Effects of Remotely Sensed Plant Functional Type and Leaf Area Index on Simulations of Boreal Forest Surface Fluxes by the NCAR Land Surface Model  

Science Conference Proceedings (OSTI)

The land surface models used with atmospheric models typically characterize landscapes in terms of generalized biome types. However, the advent of high–spatial resolution satellite-derived data products such as land cover and leaf area index (LAI)...

Keith W. Oleson; Gordon B. Bonan

2000-10-01T23:59:59.000Z

187

Evaluation of the Noah Land Surface Model Using Data from a Fair-Weather IHOP_2002 Day with Heterogeneous Surface Fluxes  

Science Conference Proceedings (OSTI)

Sources of differences between observations and simulations for a case study using the Noah land surface model–based High-Resolution Land Data Assimilation System (HRLDAS) are examined for sensible and latent heat fluxes H and LE, respectively; ...

Margaret A. LeMone; Mukul Tewari; Fei Chen; Joseph G. Alfieri; Dev Niyogi

2008-12-01T23:59:59.000Z

188

Enabling beyond-surface interactions for interactive surface with an invisible projection  

Science Conference Proceedings (OSTI)

This paper presents a programmable infrared (IR) technique that utilizes invisible, programmable markers to support interaction beyond the surface of a diffused-illumination (DI) multi-touch system. We combine an IR projector and a standard color projector ... Keywords: beyond-surface, infra-red projection, invisible marker, multi-display, multi-resolution, multi-touch, pico-projector, tabletop

Li-Wei Chan; Hsiang-Tao Wu; Hui-Shan Kao; Ju-Chun Ko; Home-Ru Lin; Mike Y. Chen; Jane Hsu; Yi-Ping Hung

2010-10-01T23:59:59.000Z

189

Land Surface Controls on Hydroclimatic Means and Variability  

Science Conference Proceedings (OSTI)

Hydroclimatic means and variability are determined in large part by the control of soil moisture on surface moisture fluxes, particularly evapotranspiration and runoff. This control is examined here using a simple water balance model and ...

Randal D. Koster; Sarith P. P. Mahanama

2012-10-01T23:59:59.000Z

190

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

191

Infrared Land Surface Emissivity in the Vicinity of the ARM SGP Central Facility  

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

Infrared Land Surface Emissivity in the Vicinity Infrared Land Surface Emissivity in the Vicinity of the ARM SGP Central Facility R. O. Knuteson, R. G. Dedecker, W. F. Feltz, B. J. Osbourne, H. E. Revercomb, and D. C. Tobin Space Science and Engineering Center University of Wisconsin-Madison Madison, Wisconsin Introduction The University of Wisconsin Space Science and Engineering Center (UW-SSEC) has developed, under National Aeronautics and Space Administration (NASA) funding, a model for the infrared land surface emissivity (LSE) in the vicinity of the U.S. Department of Energy's (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) Central Facility (CF) in North Central Oklahoma. The UW-Madison LSE model is part of the ARM best

192

Flux Parameterization over Land Surfaces for Atmospheric Models  

Science Conference Proceedings (OSTI)

In this paper a summary is given of observations and modeling efforts on surface fluxes, carried out at Cabauw in The Netherlands and during MESOGERS-84 in the south of France. Emphasis is put on those aspects that are important from a modeling ...

A. C. M. Beljaars; A. A. M. Holtslag

1991-03-01T23:59:59.000Z

193

Analysis of Spurious Surface Temperature at the Atmosphere–Land Interface and a New Method to Solve the Surface Energy Balance Equation  

Science Conference Proceedings (OSTI)

Solving the surface energy balance equation is the most important task when combining an atmospheric model and a land surface model. However, while the surface energy balance equation determines the interface temperature between the models, this ...

Hirofumi Tomita

2009-06-01T23:59:59.000Z

194

Stable water isotope simulation by current land-surface schemes:Results of IPILPS phase 1  

DOE Green Energy (OSTI)

Phase 1 of isotopes in the Project for Intercomparison of Land-surface Parameterization Schemes (iPILPS) compares the simulation of two stable water isotopologues ({sup 1}H{sub 2} {sup 18}O and {sup 1}H{sup 2}H{sup 16}O) at the land-atmosphere interface. The simulations are off-line, with forcing from an isotopically enabled regional model for three locations selected to offer contrasting climates and ecotypes: an evergreen tropical forest, a sclerophyll eucalypt forest and a mixed deciduous wood. Here we report on the experimental framework, the quality control undertaken on the simulation results and the method of intercomparisons employed. The small number of available isotopically-enabled land-surface schemes (ILSSs) limits the drawing of strong conclusions but, despite this, there is shown to be benefit in undertaking this type of isotopic intercomparison. Although validation of isotopic simulations at the land surface must await more, and much more complete, observational campaigns, we find that the empirically-based Craig-Gordon parameterization (of isotopic fractionation during evaporation) gives adequately realistic isotopic simulations when incorporated in a wide range of land-surface codes. By introducing two new tools for understanding isotopic variability from the land surface, the Isotope Transfer Function and the iPILPS plot, we show that different hydrological parameterizations cause very different isotopic responses. We show that ILSS-simulated isotopic equilibrium is independent of the total water and energy budget (with respect to both equilibration time and state), but interestingly the partitioning of available energy and water is a function of the models' complexity.

Henderson-Sellers, A.; Fischer, M.; Aleinov, I.; McGuffie, K.; Riley, W.J.; Schmidt, G.A.; Sturm, K.; Yoshimura, K.; Irannejad, P.

2005-10-31T23:59:59.000Z

195

INDICATION OF INSENSITIVITY OF PLANETARY WEATHERING BEHAVIOR AND HABITABLE ZONE TO SURFACE LAND FRACTION  

Science Conference Proceedings (OSTI)

It is likely that unambiguous habitable zone terrestrial planets of unknown water content will soon be discovered. Water content helps determine surface land fraction, which influences planetary weathering behavior. This is important because the silicate-weathering feedback determines the width of the habitable zone in space and time. Here a low-order model of weathering and climate, useful for gaining qualitative understanding, is developed to examine climate evolution for planets of various land-ocean fractions. It is pointed out that, if seafloor weathering does not depend directly on surface temperature, there can be no weathering-climate feedback on a waterworld. This would dramatically narrow the habitable zone of a waterworld. Results from our model indicate that weathering behavior does not depend strongly on land fraction for partially ocean-covered planets. This is powerful because it suggests that previous habitable zone theory is robust to changes in land fraction, as long as there is some land. Finally, a mechanism is proposed for a waterworld to prevent complete water loss during a moist greenhouse through rapid weathering of exposed continents. This process is named a 'waterworld self-arrest', and it implies that waterworlds can go through a moist greenhouse stage and end up as planets like Earth with partial ocean coverage. This work stresses the importance of surface and geologic effects, in addition to the usual incident stellar flux, for habitability.

Abbot, Dorian S.; Ciesla, Fred J. [Department of the Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60637 (United States); Cowan, Nicolas B., E-mail: abbot@uchicago.edu [Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, 2131 Tech Drive, Evanston, IL 60208 (United States)

2012-09-10T23:59:59.000Z

196

Impact of Land Model Calibration on Coupled Land-Atmosphere Prediction  

Science Conference Proceedings (OSTI)

Land-atmosphere (L-A) interactions play a critical role in determining the diurnal evolution of both planetary boundary layer (PBL) and land surface heat and moisture budgets, as well as controlling feedbacks with clouds and precipitation that ...

Joseph A. Santanello; Jr.; Sujay V. Kumar; Christa D. Peters-Lidard; Ken Harrison; Shujia Zhou

197

Land Surface Heating and the North American Monsoon Anticyclone: Model Evaluation from Diurnal to Seasonal  

E-Print Network (OSTI)

Land Surface Heating and the North American Monsoon Anticyclone: Model Evaluation from Diurnal the North American Monsoon Experiment (NAME), from observational sites as well as satellite retrievals simulations. 1. Introduction The North American monsoon (NAM) is a circulation pattern that brings summer

Miami, University of

198

Role of Land Surface Processes in South American Monsoon Development YONGKANG XUE  

E-Print Network (OSTI)

Role of Land Surface Processes in South American Monsoon Development YONGKANG XUE Department processes (VBPs) in the structure and evolution of the South American monsoon system (SAMS) with an emphasis during the monsoon mature stage, as well as better monthly mean austral summer precipitation over

Xue, Yongkang

199

Role of land surface processes in monsoon development: East Asia and West Africa  

E-Print Network (OSTI)

Role of land surface processes in monsoon development: East Asia and West Africa Yongkang Xue,1,2 H and West African monsoon development and are among the most important mechanisms governing the development of the monsoon. The results were obtained by conducting simulations for five months of 1987 using a general

Xue, Yongkang

200

GSWP-2: Multimodel Analysis and Implications for Our Perception of the Land Surface  

Science Conference Proceedings (OSTI)

The Second Global Soil Wetness Project (GSWP-2) is an initiative to compare and evaluate 10-year simulations by a broad range of land surface models under controlled conditions. A major product of GSWP-2 is the first global gridded multimodel ...

Paul A. Dirmeyer; Xiang Gao; Mei Zhao; Zhichang Guo; Taikan Oki; Naota Hanasaki

2006-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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.


201

A Global 9-yr Biophysical Land Surface Dataset from NOAA AVHRR Data  

Science Conference Proceedings (OSTI)

Global, monthly, 1° by 1° biophysical land surface datasets for 1982–90 were derived from data collected by the Advanced Very High Resolution Radiometer (AVHRR) on board the NOAA-7, -9, and -11 satellites. The AVHRR data are adjusted for sensor ...

S. O. Los; N. H. Pollack; M. T. Parris; G. J. Collatz; C. J. Tucker; P. J. Sellers; C. M. Malmström; R. S. DeFries; L. Bounoua; D. A. Dazlich

2000-04-01T23:59:59.000Z

202

Quantifying Land Surface Temperature Variability for Two Sahelian Mesoscale Regions during the Wet Season  

Science Conference Proceedings (OSTI)

Land-atmosphere feedbacks play an important role in the weather and climate of many semi-arid regions. These feedbacks are strongly controlled by how the surface responds to precipitation events, which regulate the return of heat and moisture to ...

Martin G. De Kauwe; Christopher M. Taylor; Philip P. Harris; Graham P. Weedon; Richard J. Ellis

203

An Improved Land Surface Parameterization Scheme in the ECMWF Model and Its Validation  

Science Conference Proceedings (OSTI)

A new version of the ECMWF land surface parameterization scheme is described. It has four prognostic layers in the soil for temperature and soil moisture, with a free drainage and a zero heat flux condition at the bottom as a boundary condition. ...

Pedro Viterbo; Anton C. M. Beljaars

1995-11-01T23:59:59.000Z

204

BOOK REVIEWS QUANTITATIVE REMOTE SENSING OF LAND SURFACES. By S. Liang. John  

E-Print Network (OSTI)

BOOK REVIEWS QUANTITATIVE REMOTE SENSING OF LAND SURFACES. By S. Liang. John Wiley & Sons Inc-ROM. Illustrated. Price £82�50 hard- back. This new book presents the principles of optical remote sensing. The structure, content and style of the book reflect this. It has an explicit structure: it contains neat

Liang, Shunlin

205

The Impact of Land Cover Change on Surface Energy and Water Balance in Mato Grosso, Brazil  

Science Conference Proceedings (OSTI)

The sensitivity of surface energy and water fluxes to recent land cover changes is simulated for a small region in northern Mato Grosso, Brazil. The Simple Biosphere Model (SiB2) is used, driven by biophysical parameters derived from the Moderate ...

Julia Pongratz; Lahouari Bounoua; Ruth S. DeFries; Douglas C. Morton; Liana O. Anderson; Wolfram Mauser; Carlos A. Klink

2006-10-01T23:59:59.000Z

206

Regional and Global Impacts of Land Cover Change and Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The atmospheric and land components of the Geophysical Fluid Dynamics Laboratory’s (GFDL’s) Climate Model version 2.1 (CM2.1) is used with climatological sea surface temperatures (SSTs) to investigate the relative climatic impacts of historical ...

Kirsten L. Findell; Andrew J. Pitman; Matthew H. England; Philip J. Pegion

2009-06-01T23:59:59.000Z

207

Development of global hourly 0.5-degree land surface air temperature datasets  

Science Conference Proceedings (OSTI)

Land surface air temperature (SAT) is one of the most important variables in weather and climate studies, and its diurnal cycle and day-to-day variation are also needed for a variety of applications. Global long-term hourly SAT observational data, ...

Aihui Wang; Xubin Zeng

208

Development of Global Hourly 0.5° Land Surface Air Temperature Datasets  

Science Conference Proceedings (OSTI)

Land surface air temperature (SAT) is one of the most important variables in weather and climate studies, and its diurnal cycle is also needed for a variety of applications. Global long-term hourly SAT observational data, however, do not exist. ...

Aihui Wang; Xubin Zeng

2013-10-01T23:59:59.000Z

209

Comparison of a Land Surface Model (SSiB) to Three Parameterizations of Evapotranspiration—A Study Based on ISLSCP Initiative I Data  

Science Conference Proceedings (OSTI)

Four different methods of estimating land surface evapotranspiration are compared by forcing each scheme with near-surface atmospheric and soil- and vegetation-type forcing data available through International Satellite Land Surface Climatology ...

David M. Mocko; Y. C. Sud

1998-01-01T23:59:59.000Z

210

Mourning dove differential use of reclaimed surface-mined lands in east-central Texas  

E-Print Network (OSTI)

The mourning dove (Zeniada macroura) is the most abundant and widespread North American game bird despite the fact that declines have been observed throughout much of the United States. The U.S. Fish and Wildlife Service's Central Management Unit has experienced a significant decline in the number of mourning doves heard during the Mourning Dove Call Count for the past 10- and 34-year periods. Land-use changes and loss of mourning dove habitat is often cited as reasons for these declines. Fourteen transects in different aged reclaimed surface-mined lands and in different land-use types were monitored during morning and evening hours monthly for 1 year to examine differential use by mourning doves. Mourning dove densities were determined for transects representing different aged reclaimed lands and land uses. Vegetation measurements including obstruction of vision, plant height, percent bare ground, and percent canopy cover of dominant grass, forb, and woody species were taken at systematically selected points along the transects in summer, fall, and spring. A Pearson's product-moment correlation and regression analysis was used to examine relationships between dove densities and vegetation measurements. Significant differences (P < 0.05) were found in dove densities among different aged reclaimed lands in summer, fall, and spring. Younger age classes (lands reclaimed 0-5 or 6-10 years prior to initiation of this study) and 1 of 2 controls had higher dove densities than other transects. Percent bare ground explained differences in dove densities. Plant height and obstruction of vision were negatively correlated with dove densities during spring months. Significant differences were seen in dove densities on different reclamation types. Newly reclaimed land and areas of native pasture had higher dove densities than other reclamation or vegetation types. Structural measurements explained at least part of the variation in dove densities between different reclamation types.

Huff, James Eric

2001-01-01T23:59:59.000Z

211

Introducing hysteresis in snow depletion curves to improve the water budget of a land surface model in an Alpine catchment  

Science Conference Proceedings (OSTI)

The Durance watershed (14 000 km2), located in the French Alps, generates 10% of French hydro-power and provides drinking water to 3 million people. The Catchment Land Surface Model (CLSM), a distributed land surface model (LSM) with a multilayer, ...

Claire Magand; Agnès Ducharne; Nicolas Le Moine; Simon Gascoin

212

The Prediction of Nearshore Wind-induced Surface Currents from Wind Velocities Measured at Nearby Land Stations  

Science Conference Proceedings (OSTI)

This paper aims to find a fast and efficient way to predict the wind-induced components of surface currents in a nearshore coastal area of several hundred square kilometers from wind velocities measured at nearby land stations. Ocean Surface ...

Betty Ng

1993-08-01T23:59:59.000Z

213

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

214

Increase in Near-Surface Atmospheric Moisture Content due to Land Use Changes: Evidence from the Observed Dewpoint Temperature Data  

Science Conference Proceedings (OSTI)

Land use change can significantly affect root zone soil moisture, surface energy balance, and near-surface atmospheric temperature and moisture content. During the second half of the twentieth century, portions of the North American Great Plains ...

Rezaul Mahmood; Kenneth G. Hubbard; Ronnie D. Leeper; Stuart A. Foster

2008-04-01T23:59:59.000Z

215

Toward an Integrated Land–Ocean Surface Skin Temperature Analysis from the Variational Assimilation of Infrared Radiances  

Science Conference Proceedings (OSTI)

Geostationary Operational Environmental Satellite (GOES)-East and -West window channel radiances are directly assimilated using a 1D variational technique, providing surface skin temperature (Ts) estimates over all surface types (land, water, or ...

Louis Garand

2003-05-01T23:59:59.000Z

216

Charge Retention by Gold Clusters on Surfaces Prepared Using Soft Landing of Mass Selected Ions  

Science Conference Proceedings (OSTI)

Monodisperse gold clusters have been prepared on surfaces in different charge states through soft landing of mass-selected ions. Ligand-stabilized gold clusters were prepared in methanol solution by reduction of chloro(triphenylphosphine)gold(I) with borane tert-butylamine complex in the presence of 1,3-bis(diphenylphosphino)propane. Electrospray ionization was used to introduce the clusters into the gas-phase and mass-selection was employed to isolate a single ionic cluster species (Au11L53+, L = 1,3-bis(diphenylphosphino)propane) which was delivered to surfaces at well controlled kinetic energies. Using in-situ time of flight secondary ion mass spectrometry (TOF-SIMS) it is demonstrated that the Au11L53+ cluster retains its 3+ charge state when soft landed onto the surface of a 1H,1H,2H,2H-

Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

2012-01-24T23:59:59.000Z

217

Quantifying and relating land-surface and subsurface variability in permafrost environments using lidar and surface geophsical datasets  

Science Conference Proceedings (OSTI)

The complexity of permafrost dynamics and its critical impact on climate feedbacks warrant continued development of advanced high-latitude terrestrial ecosystem characterization and monitoring approaches. In this study, we explore the value of remote sensing and surface geophysical data for characterizing land surface and subsurface properties and their linkages in an Alaskan Coastal Plain ecosystem. We base our study on data collected at the end of the 2011 growing season in the Barrow Environmental Observatory, where a nested suite of measurements were collected within a polygon-dominated region including: surface ground penetrating radar, electromagnetic, and electrical resistance tomography data; thaw depth, soil temperature and moisture content, soil texture, soil carbon and nitrogen content, and major and trace cations. Previously-collected lidar data were also available for the study. Analysis of the datasets, individually and in combination, revealed the utility of the methods for characterizing critical land-surface and subsurface properties and associated spatial zonation. Lidar analysis was performed to extract geomorphic metrics (such as slope, curvature, and directed distance of polygons), which potentially indicate drainage potential and permafrost deformation state. Cluster analysis of these lidar-obtained attributes suggested that the land surface can be grouped into three spatially coherent zones, each having a dominant geomorphic expression including: a high centered polygon zone, a low centered polygon zone and a transitional zone. Comparison of the geophysical attributes from radar, electrical resistance tomography, and electromagnetic data with point measurements suggests that the surface geophysical data can provide very high-resolution information about subsurface properties that affect ecosystem feedbacks to climate, such as thaw depth and moisture content. Cluster analysis suggested that the geophysical attributes also varied spatially in a systematic way, suggesting the presence of three laterally distinct subsurface zones. Analysis of zone-based subsurface point measurements suggests that the geophysically-defined zones have unique distributions of hydrological, thermal, and geochemical properties and that the subsurface (geophysically-based) and land-surface (lidar-based) zonation is consistent. Although the close linkage between land surface (polygonal geomorphology) and subsurface (active layer) variability revealed through our study is not surprising, to our knowledge this is the first study to document such relationships using high resolution and non-invasive approaches. This study suggests the potential of using coincident lidar and surface geophysical measurements to quantify land surface and subsurface properties (respectively) and their linkages, which are likely to play a role in terrestrial ecosystem evolution and feedbacks to climate. These findings open the way for future research focused on using combined geophysical and remote sensing datasets to estimate subsurface and land-surface properties in high resolution and over large regions as is needed for process understanding and numerical model initialization in high latitude terrestrial ecosystems.

Hubbard, Susan S [Lawrence Berkeley National Laboratory (LBNL); Gangodagmage, C [Los Alamos National Laboratory (LANL); Dafflon, B [Lawrence Berkeley National Laboratory (LBNL); Wainwright, H [Lawrence Berkeley National Laboratory (LBNL); Peterson, J [Lawrence Berkeley National Laboratory (LBNL); Gusmeroli, A [University of Alaska, Fairbanks; Ulrich, Craig [Lawrence Berkeley National Laboratory (LBNL); Wu, Yuxin [Lawrence Berkeley National Laboratory (LBNL); Wilson, Cathy [Los Alamos National Laboratory (LANL); Rowland, J [Los Alamos National Laboratory (LANL); Tweedie, Craig [University of Texas, El Paso; Wullschleger, Stan D [ORNL

2013-01-01T23:59:59.000Z

218

Effective Hydraulic Parameters in Horizontally and Vertically Heterogeneous Soils for Steady-State Land–Atmosphere Interaction  

Science Conference Proceedings (OSTI)

In this study, the authors investigate effective soil hydraulic parameter averaging schemes for steady-state flow in heterogeneous shallow subsurfaces useful to land–atmosphere interaction modeling. “Effective” soil hydraulic parameters of the ...

Binayak P. Mohanty; Jianting Zhu

2007-08-01T23:59:59.000Z

219

Surface mine pollution abatement and land use impact investigation. Volume III. Considerations of post mining land use, mine inventory and abatement plan for the quicksand watershed. Final report  

SciTech Connect

Volume III of the five volume series primarily presents three general topics. The first of these is a discussion of considerations relating to post-mining land use. Following this discussion, an evaluation of factors relating to more important environmental and land use impacts of the surface mining industry in Eastern Kentucky is presented. The last topic presents a mine inventory of the 33 surface mines located in the Quicksand Watershed in Breathitt County, Kentucky. Surface mines have several environmental and land use impacts. Those considered in the discussion which are of special importance to Eastern Kentucky are hydrologic influence, sedimentation, spoil bank stability, the impact on the public road system and mine access roads, and haul road abandonment. A number of major conclusions of general applicability are given along with some conclusions specifically related to the Quicksand Watershed.

1975-08-01T23:59:59.000Z

220

The Influence of Hydrologic Modeling on the Predicted Local Weather: Two-Way Coupling of a Mesoscale Weather Prediction Model and a Land Surface Hydrologic Model  

Science Conference Proceedings (OSTI)

A two-way coupling of the operational mesoscale weather prediction model known as Lokal Modell (LM; German Weather Service) with the land surface hydrologic “TOPMODEL”-Based Land Surface–Atmosphere Transfer Scheme (TOPLATS; Princeton University) ...

G. Seuffert; P. Gross; C. Simmer; E. F. Wood

2002-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Simulating AOGCM Soil Moisture Using an Off-Line Thornthwaite Potential Evapotranspiration–Based Land Surface Scheme. Part I: Control Runs  

Science Conference Proceedings (OSTI)

Atmosphere–ocean general circulation models (AOGCMs) employ very different land surface schemes (LSSs) and, as a result, their predictions of land surface quantities are often difficult to compare. Some of the disagreement in quantities such as ...

Adam R. Cornwell; L. D. Danny Harvey

2008-07-01T23:59:59.000Z

222

Precipitation, Recycling, and Land Memory: An Integrated Analysis  

Science Conference Proceedings (OSTI)

A synthesis of several approaches to quantifying land–atmosphere interactions is presented. These approaches use data from observations or atmospheric reanalyses applied to atmospheric tracer models and stand-alone land surface schemes. None of ...

Paul A. Dirmeyer; C. Adam Schlosser; Kaye L. Brubaker

2009-02-01T23:59:59.000Z

223

The Partitioning of Evapotranspiration into Transpiration, Soil Evaporation, and Canopy Evaporation in a GCM: Impacts on Land–Atmosphere Interaction  

Science Conference Proceedings (OSTI)

Although the global partitioning of evapotranspiration (ET) into transpiration, soil evaporation, and canopy evaporation is not well known, most current land surface schemes and the few available observations indicate that transpiration is the ...

David M. Lawrence; Peter E. Thornton; Keith W. Oleson; Gordon B. Bonan

2007-08-01T23:59:59.000Z

224

An Approach for the Representation of Surface Heterogeneity in Land Surface Models. Part I: Theoretical Framework  

Science Conference Proceedings (OSTI)

In this paper, a theoretical framework is described for the representation of surface heterogeneity within complex biophysical surface schemes for use in climate models. The methodology adopts aspects of the mosaic approach and the statistical–...

Filippo Giorgi

1997-08-01T23:59:59.000Z

225

Distributions of Surface-Layer Buoyancy Versus Lifting Condensation Level over a Heterogeneous Land Surface  

Science Conference Proceedings (OSTI)

Onset and coverage of small cumulus clouds depend on the relative abundance of surface-layer air parcels possessing favourable buoyancy and moisture—two variables that are coupled through the surface energy budget. This abundance is described ...

Kelly Schrieber; Roland Stull; Qing Zhang

1996-04-01T23:59:59.000Z

226

Body-centric design space for multi-surface interaction  

Science Conference Proceedings (OSTI)

We introduce BodyScape, a body-centric design space that allows us to describe, classify and systematically compare multi-surface interaction techniques, both individually and in combination. BodyScape reflects the relationship between users and their ... Keywords: body-centric design space, multi-surface interaction

Julie Wagner; Mathieu Nancel; Sean G. Gustafson; Stephane Huot; Wendy E. Mackay

2013-04-01T23:59:59.000Z

227

Seasonal and Interannual Variations of Evapotranspiration and Energy Exchange over Different Land Surfaces in a Semiarid Area of China  

Science Conference Proceedings (OSTI)

Seasonal and interannual variations of evapotranspiration (ET) and energy exchange were estimated over degraded grassland and cropland land surfaces in a semiarid region of northeastern China using the eddy covariance technique from 2003 to 2008. ...

Liu Huizhi; Feng Jianwu

2012-10-01T23:59:59.000Z

228

A Multiscale Ensemble Filtering System for Hydrologic Data Assimilation. Part II: Application to Land Surface Modeling with Satellite Rainfall Forcing  

Science Conference Proceedings (OSTI)

Part I of this series of studies developed procedures to implement the multiscale filtering algorithm for land surface hydrology and performed assimilation experiments with rainfall ensembles from a climate model. However, a most important ...

Ming Pan; Eric F. Wood

2009-12-01T23:59:59.000Z

229

Modeling the Effect of Land Surface Evaporation Variability on Precipitation Variability. Part II: Time- and Space-Scale structure  

Science Conference Proceedings (OSTI)

This is the second of a two-part article investigating the impact of variations of land surface evaporability on the interannual variability of precipitation. The first goal of this part is to analyze the relationship between the atmospheric ...

Oreste Reale; Paul Dirmeyer; Adam Schlosser

2002-08-01T23:59:59.000Z

230

Evaluation of the Relationship between Air and Land Surface Temperature under Clear- and Cloudy-Sky Conditions  

Science Conference Proceedings (OSTI)

Clear and cloudy daytime comparisons of land surface temperature (LST) and air temperature (Tair) were made for 14 stations included in the U.S. Climate Reference Network (USCRN) of stations from observations made from 2003 through 2008. ...

Kevin Gallo; Robert Hale; Dan Tarpley; Yunyue Yu

2011-03-01T23:59:59.000Z

231

Effects of Spatial Aggregation of Initial Conditions and Forcing Data on Modeling Snowmelt Using a Land Surface Scheme  

Science Conference Proceedings (OSTI)

Small-scale topography and snow redistribution have important effects on snow-cover heterogeneity and the timing, rate, and duration of spring snowmelt in mountain tundra environments. However, land surface schemes (LSSs) are usually applied as a ...

Pablo F. Dornes; John W. Pomeroy; Alain Pietroniro; Diana L. Verseghy

2008-08-01T23:59:59.000Z

232

Sensitivity of Climate Simulations to Land-Surface and Atmospheric Boundary-Layer Treatments-A Review  

Science Conference Proceedings (OSTI)

Aspects of the land-surface and boundary-layer treatments in some 20 or so atmospheric general circulation models (GCMS) are summarized. In only a small fraction of these have significant sensitivity studies been carried out and published. ...

J. R. Garratt

1993-03-01T23:59:59.000Z

233

A Global Climate Model (GENESIS) with a Land-Surface Transfer Scheme (LSX). Part I: Present Climate Simulation  

Science Conference Proceedings (OSTI)

The present-day climatology of a global climate model (GENESIS Version 1.02) is described. The model includes a land-surface transfer component (LSX) that accounts for the physical effects of vegetation. The atmospheric general circulation model ...

Starley L. Thompson; David Pollard

1995-04-01T23:59:59.000Z

234

The Impact of Root Weighting on the Response of Transpiration to Moisture Stress in Land Surface Schemes  

Science Conference Proceedings (OSTI)

Land surface schemes (LSSs) for large-scale climate models use a variety of different methods to represent the influence of soil moisture on transpiration. One area in which they differ is in the treatment of vertical soil moisture distribution. ...

Carl E. Desborough

1997-08-01T23:59:59.000Z

235

Copula-Derived Observation Operators for Assimilating TMI and AMSR-E Retrieved Soil Moisture into Land Surface Models  

Science Conference Proceedings (OSTI)

Assimilating soil moisture from satellite remote sensing into land surface models (LSMs) has potential for improving model predictions by providing real-time information at large scales. However, the majority of the research demonstrating this ...

Huilin Gao; Eric F. Wood; Matthias Drusch; Matthew F. McCabe

2007-06-01T23:59:59.000Z

236

A Study of the Sensitivity of Land Surface parameterizations to the Inclusion of Different Fractional Covers and Soil Textures  

Science Conference Proceedings (OSTI)

The inclusion of processes relating to soil type and vegetation is very important in an attempt to improve a land surface parameterization for use in different scale atmospheric models. There is already sample micro-meteorological information ...

D. T. Mihailovic; H. A. R. de Bruin; M. Jeftic; A. Van Dijken

1992-12-01T23:59:59.000Z

237

AVHRR-Derived Land Surface Conditions for Flux Simulations with a Mesoscale Model over the HAPEX-Sahel Study Area  

Science Conference Proceedings (OSTI)

The description of land surface conditions at a spatial scale adapted to climate and meteorological models is at the core of major problems in environment studies. In this regard, the information routinely provided by remote sensing observations ...

Roselyne Lacaze; Sylvie Donier; Pierre Lacarrère; Jean-Louis Roujean

2003-06-01T23:59:59.000Z

238

Evaluation of the Parameter Sensitivities of a Coupled Land Surface Hydrologic Model at a Critical Zone Observatory  

Science Conference Proceedings (OSTI)

Land surface models (LSMs) and hydrologic models are parameterized models. The number of involved parameters is often large. Sensitivity analysis (SA) is a key step to understand the complex relationship between state variables and parameters, and ...

Yuning Shi; Kenneth J. Davis; Fuqing Zhang; Christopher J. Duffy

239

Spatial and Temporal Scales of Boundary Layer Wind Predictability in Response to Small-Amplitude Land Surface Uncertainty  

Science Conference Proceedings (OSTI)

Predictability experiments with the Weather Research and Forecast (WRF) model as a proxy for the atmosphere are analyzed to quantify the spatial and temporal scales of boundary layer wind response to land surface perturbations. Soil moisture is ...

Joshua P. Hacker

2010-01-01T23:59:59.000Z

240

Impact of Scale and Aggregation on the Terrestrial Water Exchange: Integrating Land Surface Models and Rhône Catchment Observations  

Science Conference Proceedings (OSTI)

Land surface models (LSMs) used in climate modeling include detailed above-ground biophysics but usually lack a good representation of runoff. Both processes are closely linked through soil moisture. Soil moisture however has a high spatial ...

Reto Stöckli; Pier Luigi Vidale; Aaron Boone; Christoph Schär

2007-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Principal Components of Multi-Frequency Microwave Land Surface Emissivities. Part 2: Effects of Previous-Time Precipitation  

Science Conference Proceedings (OSTI)

The microwave land surface emissivity (MLSE) over the continental United States was examined during 2011 as a function of previous rainfall conditions using two independent emissivity estimation techniques, one providing instantaneous estimates ...

Yalei You; F. Joseph Turk; Ziad S. Haddad; Li Li; Guosheng Liu

242

A Continental-Scale Classification of Rainfall Seasonality Regimes in Africa Based on Gridded Precipitation and Land Surface Temperature Products  

Science Conference Proceedings (OSTI)

A classification of rainfall seasonality regimes in Africa was derived from gridded rainfall and land surface temperature products. By adapting a method that goes back to Walter and Lieth’s approach of presenting climatic diagrams, relationships ...

Stefanie M. Herrmann; Karen I. Mohr

2011-12-01T23:59:59.000Z

243

A Simple Coupled Atmosphere–Ocean–Sea Ice–Land Surface Model for Climate and Paleoclimate Studies  

Science Conference Proceedings (OSTI)

The authors develop a coupled atmosphere–ocean–sea ice–land surface model for long-term climate change studies that incorporates the seasonal cycle. Three ocean basins, the Antarctic Circumpolar Current region, and the major continents are ...

Zhaomin Wang; Lawrence A. Mysak

2000-03-01T23:59:59.000Z

244

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

245

DIY Design Process for Interactive Surfaces Jennifer G. Sheridan1  

E-Print Network (OSTI)

DIY Design Process for Interactive Surfaces Jennifer G. Sheridan1 , James Tompkin2 , Abel Maciel3, we propose a DIY Design Process to assist designers in building their own interactive table, adopting a DIY approach to the design of interactive tables allows developers to gain a distinct advantage

Roussos, George

246

Evaluation of land ownership, lease status, and surface features in five geopressured geothermal prospects  

DOE Green Energy (OSTI)

This study was accomplished for the purpose of gathering information pertaining to land and lease ownership, surface features and use and relevant environmental factors in the Lake Theriot (West and East), Kaplan, Bayou Hebert and Freshwater Bayou geopressured geothermal prospects in Louisiana, and the Blessing geopressured geothermal prospect in Texas. This information and recommendations predicated upon it will then be used to augment engineering and geological data utilized to select geopressured geothermal test well sites within the prospects. The five geopressured geothermal prospects are briefly described and recommendations given.

Hackenbracht, W.N.

1981-05-01T23:59:59.000Z

247

Interactive Numerical Flow Visualization Using Stream Surfaces  

E-Print Network (OSTI)

.1.2 The Interpreter . 2.1.3 The Garbage Collector . 2.1.4 The Foreign Function Interface 2.2 THE OBJECT SYSTEM.3.1 Implementation ...... . 4.3.2 Performance Measurement . 4.4 FURTHER USE OF CELL TAGS . 4.4.1 Valid Cells .. 4 Particle . 5.4.4 Ripping the Surface . . . . . 5.5 HANDLING CURVATURE .... 5.5.1 Measuring Surface

North Carolina at Chapel Hill, University of

248

The Simulation of Surface Heat Fluxes in a Land Surface?Atmosphere Model  

Science Conference Proceedings (OSTI)

A modified soil-canopy-boundary layer model based on Ek and Mahrt is presented to simulate surface heat fluxes on a daily basis. The model is validated against independent published bare soil data from Agassiz, Canada, and observations taken over ...

Huang Xinmei; T. J. Lyons

1995-05-01T23:59:59.000Z

249

Adaptive surface inspection via interactive evolution  

Science Conference Proceedings (OSTI)

An increasingly frequent application of Machine Vision technologies is in automated surface inspection for the detection of defects in manufactured products. Such systems offer significant benefits in terms of cost, detection rates, and user-satisfaction ... Keywords: Configuration, Evolution, Interative, Machine vision

P. Caleb-Solly; J. E. Smith

2007-07-01T23:59:59.000Z

250

Directed Energy Interactions with Surfaces - Argonne National Laboratories,  

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

Directed Energy Interactions with Directed Energy Interactions with Surfaces > Directed Energy Interactions with Surfaces Directed Energy Interactions with Surfaces Staff Principal Investigator Michael J. Pellin Wallis F. Calaway Dieter M. Gruen Michael R. Savina Igor Veryovkin Visiting Scientist Emil Tripa Bruce V. King Secretary Barbara Hall Theme Using world-class tools, this program seeks to develop a predictive understanding of the effects of directed energy sources (ions, electrons, and photons) on the composition, structure, and material properties of surfaces and other materials whose dimensions are of atomic scale. These tools, based on laser postionization ofatomsandmoleculesdesorbed by directed energy sources have been developed at ANL and provide the program with uniquely sensitive methods for trace analysis of

251

Modeling the Summertime Climate of Southwest Asia: The Role of Land Surface Processes in Shaping the Climate of Semiarid Regions  

Science Conference Proceedings (OSTI)

Presented is a study on the role of land surface processes in determining the summertime climate over the semiarid region of southwest Asia. In this region, a warm surface air temperature bias of 3.5°C is simulated in the summer by using the ...

Marc P. Marcella; Elfatih A. B. Eltahir

2012-01-01T23:59:59.000Z

252

Modeling the Summertime Climate of Southwest Asia: The Role of Land Surface Processes in Shaping the Climate of Semiarid Regions  

E-Print Network (OSTI)

Presented is a study on the role of land surface processes in determining the summertime climate over the semiarid region of southwest Asia. In this region, a warm surface air temperature bias of 3.5°C is simulated in the ...

Marcella, Marc P.

253

Determining Robust Impacts of Land-Use-Induced Land Cover Changes on Surface Climate over North America and Eurasia: Results from the First Set of LUCID Experiments  

Science Conference Proceedings (OSTI)

The project Land-Use and Climate, Identification of Robust Impacts (LUCID) was conceived to address the robustness of biogeophysical impacts of historical land use–land cover change (LULCC). LUCID used seven atmosphere–land models with a common ...

Nathalie de Noblet-Ducoudré; Juan-Pablo Boisier; Andy Pitman; G. B. Bonan; V. Brovkin; Faye Cruz; C. Delire; V. Gayler; B. J. J. M. van den Hurk; P. J. Lawrence; M. K. van der Molen; C. Müller; C. H. Reick; B. J. Strengers; A. Voldoire

2012-05-01T23:59:59.000Z

254

Schemes for Parameterizing Evaporation from a Non-Plant-Covered Surface and Their Impact on Partitioning the Surface Energy in Land?Air Exchange Parameterization  

Science Conference Proceedings (OSTI)

The correct simulation of the sensible and latent heat fluxes from a non-plant-covered surface is very important in designing the surface scheme for modeling the processes in the land?air exchange. However, using different bare soil evaporation ...

Dragutin T. Mihailovi?; Borivoj Rajkovi?; Branislava Lali?; Ljiljana Deki?

1995-11-01T23:59:59.000Z

255

The Influence of Boundary Layer Processes on the Diurnal Variation of the Climatological Near-Surface Wind Speed Probability Distribution over Land  

Science Conference Proceedings (OSTI)

Knowledge of the diurnally varying land surface wind speed probability distribution is essential for surface flux estimation and wind power management. Global observations indicate that the surface wind speed probability density function (PDF) is ...

Yanping He; Norman A. McFarlane; Adam H. Monahan

2012-09-01T23:59:59.000Z

256

Reclamation of abandoned surface coal mined land using flue gas desulfurization products  

SciTech Connect

Details are given of a field-scale research project where the Fleming site, in Ohio, of highly degraded and acid-forming abandoned surface coal-mined land, was reclaimed using a dry flue gas desulfurization product from an atmospheric fluidized bed combustion burner at a General Motors plant Pontiac, MI, which burned eastern Ohio coal and used dolomitic limestone for desulfurization. Plots were seeded with a mixture of grasses, wheat and clover, in 1994 and soil and water samples were analysed in 1995 and in 2009. It was found that FGD-treated plots promoted good regenerative growth, similar to that in plots using more concentrated re-soil material. The FGD treatment also greatly improved overall water quality. 3 figs., 4 tabs.

Chen, L.; Kost, D.; Dick, W.A. [Ohio State University, OH (United States)

2009-07-01T23:59:59.000Z

257

Toward A National Early Warning System for Forest Disturbances Using Remotely Sensed Land Surface Phenology  

Science Conference Proceedings (OSTI)

We are using a statistical clustering method for delineating homogeneous ecoregions as a basis for identifying disturbances in forests through time over large areas, up to national and global extents. Such changes can be shown relative to past conditions, or can be predicted relative to present conditions, as with forecasts of future climatic change. This quantitative ecoregion approach can be used to predict destinations for populations whose local environments are forecast to become unsuitable and are forced to migrate as their habitat shifts, and is also useful for predicting the susceptibility of new locations to invasive species like Sudden Oak Death. EFETAC and our sister western center WWETAC, along with our NASA and ORNL collaborators, are designing a new national-scale early warning system for forest threats, called FIRST. Envisioned as a change-detection system, FIRST will identify all land surface cover changes at the MODIS observational scale, and then try to discriminate normal, expected seasonal changes from locations having unusual activity that may represent potential forest threats. As a start, we have developed new national data sets every 16 days from 2002 through 2008, based on land surface phenology, or timing of leaf-out in the spring and brown-down in the fall. Changes in such phenological maps will be shown to contain important information about vegetation health status across the United States. The standard deviation of the duration of fall can be mapped, showing places where length of fall is relatively constant or is variable in length from year to year.

HargroveJr., William Walter [USDA Forest Service; Spruce, Joe [NASA Stennis Space Center; Gasser, Gerry [NASA Stennis Space Center; Hoffman, Forrest M [ORNL

2009-12-01T23:59:59.000Z

258

Surface and atmospheric controls on the onset of moist convection over land  

Science Conference Proceedings (OSTI)

The onset of moist convection over land is investigated using a conceptual approach with a slab boundary layer model. We here determine the essential factors for the onset of boundary layer clouds over land, and study their relative importance. ...

Pierre Gentine; Albert A. M. Holtslag; Fabio D’Andrea; Michael Ek

259

Impacts of feral hogs on reclaimed surface-mined lands in eastern Texas: a management perspective  

E-Print Network (OSTI)

During the last decade, surface lignite mines in eastern Texas have experienced damage to reclaimed lands by feral hogs (Sus scrota). Specifically, feral hogs have caused damage to vegetative plantings used in the reclamation process of surface lignite mines. In addition to vegetative losses, erosion control problems and water quality impacts have been noted. Box and corral traps were evaluated for their effectiveness in capturing feral hogs. Six male and 10 female hogs were radiomonitored from January 1998 - January 1999 at Big Brown Lignite Mine in Freestone County, Texas. Annual range size, habitat use, habitat selection, and diel movements of the feral hogs were determined using a geographic information system. Corral traps were more efficient than box traps in capturing feral hogs (P reclaimed wildlife vegetation plantings and unmixed riparian corridors on the mine site. Screening cover and free water were important landscape features that influenced hog movements. Feral hogs moved greater distances from free water and screening cover deleing nighttime hours. In addition, seasonal effects of distance from these landscape features were significant. Feral hogs traveled greater distances from both gee water and screening during winter and spring, but during fall and summer months, they remained closer (P < 0.0001) to water and cover sources. Based on the information obtained from the data analysis, management strategies for reducing hog impacts at the mine site were developed. In order to decrease feral hog impacts on the mine site, use of corral traps, box traps, and vegetation management was recommended.

Mersinger, Robert C.

1999-01-01T23:59:59.000Z

260

Diagnosing the Nature of Land–Atmosphere Coupling: A Case Study of Dry/Wet Extremes in the U.S. Southern Great Plains  

Science Conference Proceedings (OSTI)

Land–atmosphere (L–A) interactions play a critical role in determining the diurnal evolution of land surface and planetary boundary layer (PBL) temperature and moisture states and fluxes. In turn, these interactions regulate the strength of the ...

Joseph A. Santanello Jr.; Christa D. Peters-Lidard; Aaron Kennedy; Sujay V. Kumar

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Towards a Revised Monte Carlo Neutral Particle Surface Interaction Model  

DOE Green Energy (OSTI)

The components of the neutral- and plasma-surface interaction model used in the Monte Carlo neutral transport code DEGAS 2 are reviewed. The idealized surfaces and processes handled by that model are inadequate for accurately simulating neutral transport behavior in present day and future fusion devices. We identify some of the physical processes missing from the model, such as mixed materials and implanted hydrogen, and make some suggestions for improving the model.

D.P. Stotler

2005-06-09T23:59:59.000Z

262

A Coupled Biosphere–Atmosphere Climate Model Suitable for Studies of Climatic Change Due to Land Surface Alterations  

Science Conference Proceedings (OSTI)

A biosphere model based on BATS (Biosphere–Atmosphere Transfer Scheme) is coupled to a primitive equation global statistical–dynamical model in order to study the climatic impact due to land surface alterations. The fraction of the earth’s ...

Mário Adelmo Varejão-Silva; Sergio H. Franchito; Vadlamudi Brahmananda Rao

1998-07-01T23:59:59.000Z

263

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

264

A Simple Parcel Method for Prediction of Cumulus Onset and Area-Averaged Cloud Amount over Heterogeneous Land Surfaces  

Science Conference Proceedings (OSTI)

The purpose of this note is to compare several methods for predicting the onset and quantitative amount of cloud cover over heterogeneous land surfaces. Among the methods tested are that of Wilde et al. (1985) and a new, simple parcel approach. ...

Peter J. Wetzel

1990-06-01T23:59:59.000Z

265

An Analysis of Simulated Long-Term Soil Moisture Data for Three Land Uses under Contrasting Hydroclimatic Conditions in the Northern Great Plains  

Science Conference Proceedings (OSTI)

Soil moisture (SM) plays an important role in land surface and atmosphere interactions. It modifies energy balance near the surface and the rate of water cycling between land and atmosphere. The lack of observed SM data prohibits understanding of ...

Rezaul Mahmood; Kenneth G. Hubbard

2004-02-01T23:59:59.000Z

266

Ciliary contact interactions dominate surface scattering of swimming eukaryotes  

E-Print Network (OSTI)

Interactions between swimming cells and surfaces are essential to many microbiological processes, from bacterial biofilm formation to human fertilization. However, in spite of their fundamental importance, relatively little is known about the physical mechanisms that govern the scattering of flagellated or ciliated cells from solid surfaces. A more detailed understanding of these interactions promises not only new biological insights into structure and dynamics of flagella and cilia, but may also lead to new microfluidic techniques for controlling cell motility and microbial locomotion, with potential applications ranging from diagnostic tools to therapeutic protein synthesis and photosynthetic biofuel production. Due to fundamental differences in physiology and swimming strategies, it is an open question whether microfluidic transport and rectification schemes that have recently been demonstrated for pusher-type microswimmers such as bacteria and sperm cells, can be transferred to puller-type algae and other motile eukaryotes, as it is not known whether long-range hydrodynamic or short-range mechanical forces dominate the surface interactions of these microorganisms. Here, using high-speed microscopic imaging, we present direct experimental evidence that the surface scattering of both mammalian sperm cells and unicellular green algae is primarily governed by direct ciliary contact interactions. Building on this insight, we predict and verify experimentally the existence of optimal microfluidic ratchets that maximize rectification of initially uniform Chlamydomonas reinhardtii suspensions. Since mechano-elastic properties of cilia are conserved across eukaryotic species, we expect that our results apply to a wide range of swimming microorganisms.

Vasily Kantsler; Jörn Dunkel; Marco Polin; Raymond E. Goldstein

2013-01-17T23:59:59.000Z

267

ACM International Conference on Interactive Tabletops and Surfaces  

Science Conference Proceedings (OSTI)

We are pleased to host the ACM International Conference on Interactive Tabletops and Surfaces (ITS) 2010, held November 7th to the 10th, 2010, in Saarbrücken, Germany. ITS 2010 is the 5th event in a series of annual research workshops and conferences ...

Antonio Krüger; Johannes Schöning; Daniel Wigdor; Michael Haller

2010-11-01T23:59:59.000Z

268

Curvilinear parabolic approximation for surface wave transformation with wavecurrent interaction  

E-Print Network (OSTI)

Curvilinear parabolic approximation for surface wave transformation with wave­current interaction not be an appropriate method for the purpose of simplifying the curvilinear parabolic approximation of the vector form of the wave­current equation given by Kirby [Higher-order approximations in the parabolic equation method

Kirby, James T.

269

Modeling Soil Moisture and Surface Flux Variability with an Untuned Land Surface Scheme: A Case Study from the Southern Great Plains 1997 Hydrology Experiment  

Science Conference Proceedings (OSTI)

The Parameterization for Land–Atmosphere–Cloud Exchange (PLACE), a typical surface–vegetation–atmosphere transfer (SVAT) parameterization, was used in a case study of a 2500 km2 area in southwestern Oklahoma for 9–16 July 1997. The research ...

Karen I. Mohr; James S. Famiglietti; Aaron Boone; Patrick J. Starks

2000-04-01T23:59:59.000Z

270

Interaction of CO with Surface PdZn Alloys  

SciTech Connect

The adsorption and bonding configuration of CO on clean and Zn-covered Pd(111) surfaces was studied using Low Energy Electron Diffraction (LEED), Temperature Programmed Desorption (TPD) and High Resolution Electron Energy Loss Spectroscopy (HREELS). LEED and TPD results indicate that annealing at 520 K is sufficient to induce reaction between adsorbed Zn atoms and the Pd(111) surface resulting in the formation of an ordered surface PdZn alloy. Carbon monoxide was found to bond more weakly to the Zn/Pd(111) alloy surfaces compared to clean Pd(111). Zn addition was also found to alter the preferred adsorption sites for CO from threefold hollow to atop sites. Similar behavior was observed for supported Pd-Zn/Al2O3 catalysts. The results of this study show that both ensemble and electronic effects play a role in how Zn alters the interactions of CO with the surface.

Jeroro, E.; Lebarbier, Vanessa MC; Datye, Abhaya; Wang, Yong; Vohs, John M.

2007-12-01T23:59:59.000Z

271

Surface based remote sensing of aerosol-cloud interactions  

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

Surface based remote sensing of aerosol-cloud interactions Surface based remote sensing of aerosol-cloud interactions Feingold, Graham NOAA/Environmental Technology Laboratory Frisch, Shelby NOAA/Environmental Technology Laboratory Min, Qilong State University of New York at Albany Category: Cloud Properties We will present an analysis of the effect of aerosol on clouds at the Southern Great Plains ARM site. New methods for retrieving cloud droplet effective radius with radar (MMCR), multifilter rotating shadowband radiometer (MFRSR), and microwave radiometer (MWR) will be discussed. Relationships based on adiabatic clouds will be used to constrain retrievals. We will investigate the use of a range of proxies for cloud condensation nuclei, ranging from surface measurements of light scattering and accumulation mode number concentration, to lidar-measured extinction or

272

Analysis of the linkages between rainfall and land surface conditions in the West African monsoon through CMAP, ERS-WSC, and  

E-Print Network (OSTI)

Analysis of the linkages between rainfall and land surface conditions in the West African monsoon monsoon. Citation: Philippon, N., E. Mougin, L. Jarlan, and P.-L. Frison (2005), Analysis of the linkages between rainfall and land surface conditions in the West African monsoon through CMAP, ERS-WSC, and NOAA

Paris-Sud XI, Université de

273

Coupling an Advanced Land Surface–Hydrology Model with the Penn State–NCAR MM5 Modeling System. Part I: Model Implementation and Sensitivity  

Science Conference Proceedings (OSTI)

This paper addresses and documents a number of issues related to the implementation of an advanced land surface–hydrology model in the Penn State–NCAR fifth-generation Mesoscale Model (MM5). The concept adopted here is that the land surface model ...

Fei Chen; Jimy Dudhia

2001-04-01T23:59:59.000Z

274

Simulating the Effects of Irrigation over the United States in a Land Surface Model Based on Satellite-Derived Agricultural Data  

Science Conference Proceedings (OSTI)

A novel method is introduced for integrating satellite-derived irrigation data and high-resolution crop-type information into a land surface model (LSM). The objective is to improve the simulation of land surface states and fluxes through better ...

Mutlu Ozdogan; Matthew Rodell; Hiroko Kato Beaudoing; David L. Toll

2010-02-01T23:59:59.000Z

275

Relative Roles of Large-Scale Orography and Land Surface Processes in the Global Hydroclimate. Part II: Impacts on Hydroclimate over Eurasia  

Science Conference Proceedings (OSTI)

A series of simplistic simulations from an AGCM coupled to a simple land surface scheme and water vapor tracers was performed to explore the relative roles of basic factors in land surface conditions, with regard to the seasonal evolution of the ...

Kazuyuki Saito; Tetsuzo Yasunari; Kumiko Takata

2006-08-01T23:59:59.000Z

276

Effect of Land–Atmosphere Interactions on the IHOP 24–25 May 2002 Convection Case  

Science Conference Proceedings (OSTI)

Numerical simulations are conducted using the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) to investigate the impact of land–vegetation processes on the prediction of mesoscale convection observed on 24–25 May 2002 during the ...

Teddy R. Holt; Dev Niyogi; Fei Chen; Kevin Manning; Margaret A. LeMone; Aneela Qureshi

2006-01-01T23:59:59.000Z

277

Ocean-Cloud-Atmosphere-Land Interactions in the Southeastern Pacific: The VOCALS Program  

Science Conference Proceedings (OSTI)

The present paper describes the VAMOS Ocean-Cloud-Atmosphere-Land Study (VOCALS), an international research program focused on the improved understanding and modeling of the southeastern Pacific (SEP) climate system on diurnal to interannual timescales. ...

C. R. Mechoso; R. Wood; R. Weller; C. S. Bretherton; A. D. Clarke; H. Coe; C. Fairall; J. T. Farrar; G. Feingold; R. Garreaud; C. Grados; J. McWilliams; S. P. de Szoeke; S. E. Yuter; P. Zuidema

278

A Land–Atmosphere Interaction Theory for the Tropical Deforestation Problem  

Science Conference Proceedings (OSTI)

A theoretical framework is developed in understanding the mechanisms and processes determining the response of the land–atmosphere system to tropical deforestation. The analytical approach is made possible by simplifications in the vertical from ...

Ning Zeng; J. David Neelin

1999-03-01T23:59:59.000Z

279

Evaluating Surface Water Cycle Simulated by the Australian Community Land Surface Model (CABLE) across Different Spatial and Temporal Domains  

Science Conference Proceedings (OSTI)

The terrestrial water cycle in the Australian Community Atmosphere Biosphere Land Exchange (CABLE) model has been evaluated across a range of temporal and spatial domains. A series of offline experiments were conducted using the forcing data from ...

Huqiang Zhang; Bernard Pak; Ying Ping Wang; Xinyao Zhou; Yongqiang Zhang; Liang Zhang

2013-08-01T23:59:59.000Z

280

Surface interactions involved in flashover with high density electronegative gases.  

Science Conference Proceedings (OSTI)

This report examines the interactions involved with flashover along a surface in high density electronegative gases. The focus is on fast ionization processes rather than the later time ionic drift or thermalization of the discharge. A kinetic simulation of the gas and surface is used to examine electron multiplication and includes gas collision, excitation and ionization, and attachment processes, gas photoionization and surface photoemission processes, as well as surface attachment. These rates are then used in a 1.5D fluid ionization wave (streamer) model to study streamer propagation with and without the surface in air and in SF6. The 1.5D model therefore includes rates for all these processes. To get a better estimate for the behavior of the radius we have studied radial expansion of the streamer in air and in SF6. The focus of the modeling is on voltage and field level changes (with and without a surface) rather than secondary effects, such as, velocities or changes in discharge path. An experiment has been set up to carry out measurements of threshold voltages, streamer velocities, and other discharge characteristics. This setup includes both electrical and photographic diagnostics (streak and framing cameras). We have observed little change in critical field levels (where avalanche multiplication sets in) in the gas alone versus with the surface. Comparisons between model calculations and experimental measurements are in agreement with this. We have examined streamer sustaining fields (field which maintains ionization wave propagation) in the gas and on the surface. Agreement of the gas levels with available literature is good and agreement between experiment and calculation is good also. Model calculations do not indicate much difference between the gas alone versus the surface levels. Experiments have identified differences in velocity between streamers on the surface and in the gas alone (the surface values being larger).

Hodge, Keith Conquest; Warne, Larry Kevin; Jorgenson, Roy Eberhardt; Wallace, Zachariah Red; Lehr, Jane Marie

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Ciliary contact interactions dominate surface scattering of swimming eukaryotes  

E-Print Network (OSTI)

Interactions between swimming cells and surfaces are essential to many microbiological processes, from bacterial biofilm formation to human fertilization. However, in spite of their fundamental importance, relatively little is known about the physical mechanisms that govern the scattering of flagellated or ciliated cells from solid surfaces. A more detailed understanding of these interactions promises not only new biological insights into structure and dynamics of flagella and cilia, but may also lead to new microfluidic techniques for controlling cell motility and microbial locomotion, with potential applications ranging from diagnostic tools to therapeutic protein synthesis and photosynthetic biofuel production. Due to fundamental differences in physiology and swimming strategies, it is an open question whether microfluidic transport and rectification schemes that have recently been demonstrated for pusher-type microswimmers such as bacteria and sperm cells, can be transferred to puller-type algae and other...

Kantsler, Vasily; Polin, Marco; Goldstein, Raymond E

2013-01-01T23:59:59.000Z

282

The Impact of Land Surface and Atmospheric Initialization on Seasonal Forecasts with CCSM  

Science Conference Proceedings (OSTI)

Series of forecast experiments for two seasons investigate the impact of specifying realistic initial states of the land in conjunction with the observed states of the ocean and atmosphere while using the National Center for Atmospheric Research (...

Daniel A. Paolino; James L. Kinter III; Ben P. Kirtman; Dughong Min; David M. Straus

2012-02-01T23:59:59.000Z

283

Satellite-Scale Snow Water Equivalent Assimilation into a High-Resolution Land Surface Model  

Science Conference Proceedings (OSTI)

Four methods based on the ensemble Kalman filter (EnKF) are tested to assimilate coarse-scale (25 km) snow water equivalent (SWE) observations (typical of passive microwave satellite retrievals) into finescale (1 km) land model simulations. ...

Gabriëlle J. M. De Lannoy; Rolf H. Reichle; Paul R. Houser; Kristi R. Arsenault; Niko E. C. Verhoest; Valentijn R. N. Pauwels

2010-04-01T23:59:59.000Z

284

Nesting ecology of dickcissels on reclaimed surface-mined lands in Freestone County, Texas  

E-Print Network (OSTI)

Surface mining and subsequent reclamation often results in the establishment of large areas of grassland that can benefit wildlife. Grasslands have declined substantially over the last 150 years, resulting in declines of many grassland birds. The dickcissel (Spiza americana), a neotropical migrant, is one such bird whose numbers have declined in the last 30 years due to habitat loss, increased nest predation and parasitism, and over harvest (lethally controlled as an agricultural pest on its wintering range in Central and South America). Reclaimed surface-mined lands have been documented to provide important breeding habitat for dickcissels in the United States, emphasizing the importance of reclamation efforts. Objectives were to understand specific aspects of dickcissel nesting ecology (i.e., nest-site selection, nest success, and nest parasitism, and identification of nest predators) on 2 spatial scales on TXU Energy?s Big Brown Mine, near Fairfield, Texas, and to subsequently provide TXU Energy with recommendations to improve reclaimed areas as breeding habitat for dickcissels. I examined the influence of nest-site vegetation characteristics and the effects of field-level spatial factors on dickcissel nesting ecology on 2 sites reclaimed as wildlife habitat. Additionally, I developed a novel technique to identify predators at active nests during the 2003 field season. During 2002?2003, 119 nests were monitored. On smaller spatial scales, dickcissels were likely to select nest-sites with low vegetation, high densities of bunchgrasses and tall forbs, and areas with higher clover content. Probability of nest success increased with nest heights and vegetation heights above the nest, characteristics associated with woody nesting substrates. Woody nesting substrates were selected and bunchgrasses were avoided. Oak (Quercus spp.) saplings remained an important nesting substrate throughout the breeding season. On a larger scale, nest-site selection was likely to occur farther from wooded riparian areas and closer to recently-reclaimed areas. Nest parasitism was likely to occur near roads and wooded riparian areas. Results suggest reclaimed areas could be improved by planting more bunchgrasses, tall forbs (e.g., curly-cup gumweed [Grindelia squarrosa] and sunflower [Helianthus spp.]), clover (Trifolium spp.), and oaks (a preferred nesting substrate associated with higher survival rates). Larger-scale analysis suggests that larger tracts of wildlife areas should be created with wooded riparian areas comprising a minimal portion of a field?s edge.

Dixon, Thomas Pingul

2004-12-01T23:59:59.000Z

285

Recolonization of surface-mined lands by pocket gophers (Geomys breviceps) in East Texas Post Oak Savannah  

E-Print Network (OSTI)

Surface mining involves the use of heavy equipment that would theoretically create underground vibrations sensed by pocket gophers. To determine if vibrations cause pocket gopher movement away from areas being mined, gopher movements were monitored in a hay field adjacent to an active mine pit on Big Brown Mine in Freestone County, Texas. Gophers were live-trapped in summer 2000 prior to mining activity, injected subcutaneously with a passive integrated transponder (PIT) tag, and released. Coordinates of each capture location were recorded. After mining began and spoil piles were established adjacent to the field, re-trapping was conducted. Upon capture each pocket gopher was scanned for a PIT tag and newly caught animals were tagged. Location coordinates were recorded to determine movement between capture sites. Of the 58 gophers captured and tagged, 9 individuals were recaptured. Pocket gophers did not appear to move away from mining activity, so they might have been adversely affected. However, the number of individuals in the population remained constant during the study, indicating there was no population effect. During January and February 2001, all remaining non-mined and reclaimed lands within the mine were surveyed for pocket gopher activity (mounds). Activity was found on non-mined land adjacent to reclaimed land but no activity was found on reclaimed land. Pocket gopher populations did not reestablish on reclaimed lands because of the removal of sandy soils and subsequent replacement with hard, loamy soils. If pocket gophers are desired on reclaimed lands, then it would be important to retain areas of topsoil containing at least 80% sand.

Gutierrez, Paula B

2001-01-01T23:59:59.000Z

286

Ecosystem feedbacks to climate change in California: Development, testing, and analysis using a coupled regional atmosphere and land-surface model (WRF3-CLM3.5)  

Science Conference Proceedings (OSTI)

A regional atmosphere model [Weather Research and Forecasting model version 3 (WRF3)] and a land surface model [Community Land Model, version 3.5 (CLM3.5)] were coupled to study the interactions between the atmosphere and possible future California land-cover changes. The impact was evaluated on California's climate of changes in natural vegetation under climate change and of intentional afforestation. The ability of WRF3 to simulate California's climate was assessed by comparing simulations by WRF3-CLM3.5 and WRF3-Noah to observations from 1982 to 1991. Using WRF3-CLM3.5, the authors performed six 13-yr experiments using historical and future large-scale climate boundary conditions from the Geophysical Fluid Dynamics Laboratory Climate Model version 2.1 (GFDL CM2.1). The land-cover scenarios included historical and future natural vegetation from the Mapped Atmosphere-Plant-Soil System-Century 1 (MC1) dynamic vegetation model, in addition to a future 8-million-ha California afforestation scenario. Natural vegetation changes alone caused summer daily-mean 2-m air temperature changes of -0.7 to +1 C in regions without persistent snow cover, depending on the location and the type of vegetation change. Vegetation temperature changes were much larger than the 2-m air temperature changes because of the finescale spatial heterogeneity of the imposed vegetation change. Up to 30% of the magnitude of the summer daily-mean 2-m air temperature increase and 70% of the magnitude of the 1600 local time (LT) vegetation temperature increase projected under future climate change were attributable to the climate-driven shift in land cover. The authors projected that afforestation could cause local 0.2-1.2 C reductions in summer daily-mean 2-m air temperature and 2.0-3.7 C reductions in 1600 LT vegetation temperature for snow-free regions, primarily because of increased evapotranspiration. Because some of these temperature changes are of comparable magnitude to those projected under climate change this century, projections of climate and vegetation change in this region need to consider these climate-vegetation interactions.

Subin, Z.M.; Riley, W.J.; Kueppers, L.M.; Jin, J.; Christianson, D.S.; Torn, M.S.

2010-11-01T23:59:59.000Z

287

Global 4DVAR Assimilation and Forecast Experiments Using AMSU Observations over Land. Part I: Impacts of Various Land Surface Emissivity Parameterizations  

Science Conference Proceedings (OSTI)

To improve the assimilation of Advanced Microwave Sounding Unit-A and -B (AMSU-A and -B) observations over land, three methods, based either on an estimation of the land emissivity or the land skin temperature directly from satellite observations,...

Fatima Karbou; Elisabeth Gérard; Florence Rabier

2010-02-01T23:59:59.000Z

288

Effects of Saturated and Dry Land Surfaces on the Tropical Circulation and Precipitation in a General Circulation Model  

Science Conference Proceedings (OSTI)

A comprehensive rhomboidal-15 general circulation model with idealized boundary conditions is used to investigate the effects of interactions between the tropical circulation and continental climate on the precipitation distribution. Sea surface ...

Kerry H. Cook; Anand Gnanadesikan

1991-09-01T23:59:59.000Z

289

Global 4DVAR Assimilation and Forecast Experiments Using AMSU Observations over Land. Part II: Impacts of Assimilating Surface-Sensitive Channels on the African Monsoon during AMMA  

Science Conference Proceedings (OSTI)

Observations from Advanced Microwave Sounding Unit-A and -B (AMSU-A and -B) have been more intensively used over sea than over land because of large uncertainties about the land surface emissivity and the skin temperature. Several methods based ...

Fatima Karbou; Florence Rabier; Jean-Philippe Lafore; Jean-Luc Redelsperger; Olivier Bock

2010-02-01T23:59:59.000Z

290

Contribution of Land Use Changes to Near-Surface Air Temperatures during Recent Summer Extreme Heat Events in the Phoenix Metropolitan Area  

Science Conference Proceedings (OSTI)

The impact of 1973–2005 land use–land cover (LULC) changes on near-surface air temperatures during four recent summer extreme heat events (EHEs) are investigated for the arid Phoenix, Arizona, metropolitan area using the Weather Research and ...

Susanne Grossman-Clarke; Joseph A. Zehnder; Thomas Loridan; C. Sue B. Grimmond

2010-08-01T23:59:59.000Z

291

Noah-GEM and Land Data Assimilation System (LDAS) based downscaling of global reanalysis surface fields: Evaluations using observations from a CarboEurope agricultural site  

Science Conference Proceedings (OSTI)

This study provides the first assessment of the Noah and Noah-GEM (photosynthesis-based Gas exchange Evapotranspiration Model) land surface model using observations from the Avignon, France CarboEurope agricultural site during 2006 and 2007. Noah and ... Keywords: CarboEurope, Fluxnet, Land Data Assimilation System, Latent heat flux, Noah, Noah-GEM

Umarporn Charusombat; Dev Niyogi; SéBastien Garrigues; Albert Olioso; Olivier Marloie; Michael Barlage; Fei Chen; Michael Ek; Xuemei Wang; Zhiyong Wu

2012-08-01T23:59:59.000Z

292

Sensitivity of Surface Flux Simulations to Hydrologic Parameters Based on an Uncertainty Quantification Framework Applied to the Community Land Model  

SciTech Connect

Uncertainties in hydrologic parameters could have significant impacts on the simulated water and energy fluxes and land surface states, which will in turn affect atmospheric processes and the carbon cycle. Quantifying such uncertainties is an important step toward better understanding and quantification of uncertainty of integrated earth system models. In this paper, we introduce an uncertainty quantification (UQ) framework to analyze sensitivity of simulated surface fluxes to selected hydrologic parameters in the Community Land Model (CLM4) through forward modeling. Thirteen flux tower footprints spanning a wide range of climate and site conditions were selected to perform sensitivity analyses by perturbing the parameters identified. In the UQ framework, prior information about the parameters was used to quantify the input uncertainty using the Minimum-Relative-Entropy approach. The quasi-Monte Carlo approach was applied to generate samples of parameters on the basis of the prior pdfs. Simulations corresponding to sampled parameter sets were used to generate response curves and response surfaces and statistical tests were used to rank the significance of the parameters for output responses including latent (LH) and sensible heat (SH) fluxes. Overall, the CLM4 simulated LH and SH show the largest sensitivity to subsurface runoff generation parameters. However, study sites with deep root vegetation are also affected by surface runoff parameters, while sites with shallow root zones are also sensitive to the vadose zone soil water parameters. Generally, sites with finer soil texture and shallower rooting systems tend to have larger sensitivity of outputs to the parameters. Our results suggest the necessity of and possible ways for parameter inversion/calibration using available measurements of latent/sensible heat fluxes to obtain the optimal parameter set for CLM4. This study also provided guidance on reduction of parameter set dimensionality and parameter calibration framework design for CLM4 and other land surface models under different hydrologic and climatic regimes.

Hou, Zhangshuan; Huang, Maoyi; Leung, Lai-Yung R.; Lin, Guang; Ricciuto, Daniel M.

2012-08-10T23:59:59.000Z

293

Weather Noise Forcing of Surface Climate Variability  

Science Conference Proceedings (OSTI)

A model-based method to evaluate the role of weather noise forcing of low-frequency variability of surface properties, including SST, surface currents, land surface temperature, and soil moisture, is presented. In this procedure, an “interactive ...

Edwin K. Schneider; Meizhu Fan

2007-09-01T23:59:59.000Z

294

Evaluation of AMIP II Global Climate Model Simulations of the Land Surface Water Budget and Its Components over the GEWEX-CEOP Regions  

Science Conference Proceedings (OSTI)

The land surface water balance components simulated by 20 atmospheric global circulation models (AGCMs) participating in phase II of the Atmospheric Model Intercomparison Project (AMIP II) are analyzed globally and over seven Global Energy and ...

P. Irannejad; A. Henderson-Sellers

2007-06-01T23:59:59.000Z

295

Investigation of the Sensitivity of Water Cycle Components Simulated by the Canadian Regional Climate Model to the Land Surface Parameterization, the Lateral Boundary Data, and the Internal Variability  

Science Conference Proceedings (OSTI)

This study investigates the sensitivity of components of the hydrological cycle simulated by the Canadian Regional Climate Model (CRCM) to lateral boundary forcing, the complexity of the land surface scheme (LSS), and the internal variability ...

Biljana Music; Daniel Caya

2009-02-01T23:59:59.000Z

296

A Revised Land Surface Parameterization (SiB2) for GCMS. Part III: The Greening of the Colorado State University General Circulation Model  

Science Conference Proceedings (OSTI)

SiB2, the second-generation land-surface parameterization developed by Sellers et al., has been incorporated into the Colorado State University general circulation model and tested in multidecade simulation. The control run uses a “bucket” ...

D.A. Randall; D.A. Dazlich; C. Zhang; A.S. Denning; P.J. Sellers; C.J. Tucker; L. Bounoua; J.A. Berry; G.J. Collatz; C.B. Field; S.O. Los; C.O. Justice; I. Fung

1996-04-01T23:59:59.000Z

297

Testing the Effects of a New Land Surface Scheme and of Initial Soil Moisture Conditions in the Canadian Global Forecast Model  

Science Conference Proceedings (OSTI)

A new land surface scheme developed for the Canadian general circulation model has been introduced into the Canadian global forecast model and tested for a summer case. It features three soil layers, a snow layer, and a vegetation layer; its ...

Yves Delage; Diana Verseghy

1995-11-01T23:59:59.000Z

298

Validation of the Coupled NCEP Mesoscale Spectral Model and an Advanced Land Surface Model over the Hawaiian Islands. Part II: A High Wind Event  

Science Conference Proceedings (OSTI)

A high wind event (14–15 February 2001) over the Hawaiian Islands associated with a cold front is simulated using the National Centers for Environmental Prediction (NCEP) Mesoscale Spectral Model (MSM) coupled with an advanced land surface model (...

Yongxin Zhang; Yi-Leng Chen; Kevin Kodama

2005-12-01T23:59:59.000Z

299

An Evaluation of Two Models for Estimation of the Roughness Height for Heat Transfer between the Land Surface and the Atmosphere  

Science Conference Proceedings (OSTI)

Roughness height for heat transfer is a crucial parameter in estimation of heat transfer between the land surface and the atmosphere. Although many empirical formulations have been proposed over the past few decades, the uncertainties associated ...

Z. Su; T. Schmugge; W. P. Kustas; W. J. Massman

2001-11-01T23:59:59.000Z

300

Relative Roles of Large-Scale Orography and Land Surface Processes in the Global Hydroclimate. Part I: Impacts on Monsoon Systems and the Tropics  

Science Conference Proceedings (OSTI)

A series of numerical simulations by an atmospheric general circulation model (AGCM) was conducted to evaluate the relative roles of Tibetan Plateau (TP) and continental-scale land surface processes on the Asian monsoon and hydroclimates in other ...

Tetsuzo Yasunari; Kazuyuki Saito; Kumiko Takata

2006-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Estimating Land Surface Energy Budgets From Space: Review and Current Efforts at the University of Wisconsin—Madison and USDA–ARS  

Science Conference Proceedings (OSTI)

Since the advent of the meteorological satellite, a large research effort within the community of earth scientists has been directed at assessing the components of the land surface energy balance from space. The development of these techniques ...

George R. Diak; John R. Mecikalski; Martha C. Anderson; John M. Norman; William P. Kustas; Ryan D. Torn; Rebecca L. DeWolf

2004-01-01T23:59:59.000Z

302

Investigating the Ability of a Land Surface Model to Simulate Streamflow with the Accuracy of Hydrological Models: A Case Study Using MOPEX Materials  

Science Conference Proceedings (OSTI)

In the Model Parameter Estimation Experiment (MOPEX) project, after calibration of model parameters, complex rainfall–runoff hydrological models (HMs) simulated streamflow better than land surface models (LSMs), including the Soil–Water–...

Olga N. Nasonova; Yeugeniy M. Gusev; Yeugeniy E. Kovalev

2009-10-01T23:59:59.000Z

303

A long-term hydrologically based data set of land surface fluxes and states for the conterminous U.S.: Update and extensions  

Science Conference Proceedings (OSTI)

We describe a publicly available, long-term (1915 – 2011), hydrologically consistent data set for the conterminous United States, intended to aid in studies of water and energy exchanges at the land surface. These data are gridded at a spatial ...

Ben Livneh; Eric A. Rosenberg; Chiyu Lin; Bart Nijssen; Vimal Mishra; Kostas M. Andreadis; Edwin P. Maurer; Dennis P. Lettenmaier

304

An Evaluation of Satellite Remote Sensing Data Products for Land Surface Hydrology: Atmospheric Infrared Sounder  

Science Conference Proceedings (OSTI)

The skill of instantaneous Atmospheric Infrared Sounder (AIRS) retrieved near-surface meteorology, including surface skin temperature (Ts), air temperature (Ta), specific humidity (q), and relative humidity (RH), as well as model-derived surface ...

Craig R. Ferguson; Eric F. Wood

2010-12-01T23:59:59.000Z

305

Sensitivity of Model-Generated Daytime Surface Heat Fluxes over Snow to Land-Cover Changes  

Science Conference Proceedings (OSTI)

Snow cover can significantly suppress daytime temperatures by increasing the surface albedo and limiting the surface temperature to 0°C. The strength of this effect is dependent upon how well the snow can cover, or mask, the underlying surface. ...

John E. Strack; Roger A. Pielke Sr.; Jimmy Adegoke

2003-02-01T23:59:59.000Z

306

Analysis of human spatial perception during lunar landing  

E-Print Network (OSTI)

Crewed lunar landings require astronauts to interact with automated systems to identify a location that is level and free of hazards and to guide the vehicle to the lunar surface through a controlled descent. However, ...

Clark, Torin K.

307

Stratosphere–Troposphere Coupling and Links with Eurasian Land Surface Variability  

Science Conference Proceedings (OSTI)

A diagnostic of Northern Hemisphere winter extratropical stratosphere–troposphere interactions is presented to facilitate the study of stratosphere–troposphere coupling and to examine what might influence these interactions. The diagnostic is a ...

Judah Cohen; Mathew Barlow; Paul J. Kushner; Kazuyuki Saito

2007-11-01T23:59:59.000Z

308

Albedo estimates for land surface models and support for a new paradigm based on foliage nitrogen concentration  

Science Conference Proceedings (OSTI)

Vegetation albedo is a critical component of the Earth s climate system, yet efforts to evaluate and improve albedo parameterizations in climate models have lagged relative to other aspects of model development. Here, we calculated growing season albedos for deciduous and evergreen forests, crops, and grasslands based on over 40 site-years of data from the AmeriFlux network and compared them with estimates presently used in the land surface formulations of a variety of climate models. Generally, the albedo estimates used in land surface models agreed well with this data compilation. However, a variety of models using fixed seasonal estimates of albedo overestimated the growing season albedo of northerly evergreen trees. In contrast, climatemodels that rely on a common two-stream albedo submodel provided accurate predictions of boreal needle-leaf evergreen albedo but overestimated grassland albedos. Inverse analysis showed that parameters of the two-stream model were highly correlated. Consistent with recent observations based on remotely sensed albedo, the AmeriFlux dataset demonstrated a tight linear relationship between canopy albedo and foliage nitrogen concentration (for forest vegetation: albedo 50.0110.071%N, r250.91; forests, grassland, and maize: albedo50.0210.067%N, r250.80). However, this relationship saturated at the higher nitrogen concentrations displayed by soybean foliage. We developed similar relationships between a foliar parameter used in the two-stream albedo model and foliage nitrogen concentration. These nitrogen-based relationships can serve as the basis for a new approach to land surface albedo modeling that simplifies albedo estimation while providing a link to other important ecosystem processes.

Hollinger, D. [USDA Forest Service; Ollinger, S. V. [University of Hew Hampshire; Richardson, A. D. [University of Hew Hampshire; Martin, M. E. [University of New Hampshire; Meyers, T. P. [NOAA ATDD; Dail, D. B. [University of Maine; Scott, N. A. [Queens University, Kingston, ON, Canada; Arkebauer, T. J. [University of Nebraska, Lincoln; Baldocchi, D. D. [University of California, Berkeley; Clark, K. L. [USDA Forest Service; Curtis, Peter [Ohio State University, The, Columbus; Davis, K. J. [Pennsylvania State University; Desai, Desai Ankur R. [University of Wisconsin, Madison; Dragoni, Danilo [Indiana University; Goulden, M. L. [University of California, Irvine; Gu, Lianhong [ORNL; Katul, G. G. [Duke University; Pallardy, Stephen G. [University of Missouri; Pawu, K. T. [University of California, Davis; Schmid, H. P. [IFU, FZK IMK, Institute of Meteorology & Climate, Garmisch Partenkirchen, Germany; Stoy, P. C. [University of Edinburgh; Suyker, A. E. [University of Nebraska, Lincoln; Verma, Shashi [University of Nebraska

2009-02-01T23:59:59.000Z

309

An update on modeling land-ice/ocean interactions in CESM  

SciTech Connect

This talk is an update on ongoing land-ice/ocean coupling work within the Community Earth System Model (CESM). The coupling method is designed to allow simulation of a fully dynamic ice/ocean interface, while requiring minimal modification to the existing ocean model (the Parallel Ocean Program, POP). The method makes use of an immersed boundary method (IBM) to represent the geometry of the ice-ocean interface without requiring that the computational grid be modified in time. We show many of the remaining development challenges that need to be addressed in order to perform global, century long climate runs with fully coupled ocean and ice sheet models. These challenges include moving to a new grid where the computational pole is no longer at the true south pole and several changes to the coupler (the software tool used to communicate between model components) to allow the boundary between land and ocean to vary in time. We discuss benefits for ice/ocean coupling that would be gained from longer-term ocean model development to allow for natural salt fluxes (which conserve both water and salt mass, rather than water volume).

Asay-davis, Xylar [Los Alamos National Laboratory

2011-01-24T23:59:59.000Z

310

Modeling land-surface/atmosphere dynamics for CHAMMP. Progress report, August 1, 1992--31 July 1993  

SciTech Connect

Project progress is described on a DOE CHAMP project to model the land-surface/atmosphere coupling in a heterogeneous environment. This work is a collaboration between scientists at Iowa State University and the University of New Hampshire. Work has proceeded in two areas: baseline model coupling and data base development for model validation. The core model elements (land model, atmosphere model) have been ported to the Principal Investigator`s computing system and baseline coupling has commenced. The initial target data base is the set of observations from the FIFE field campaign, which is in the process of being acquired. For the remainder of the project period, additional data from the region surrounding the FIFE site and from other field campaigns will be acquired to determine how to best extrapolate results from the initial target region to the rest of the globe. In addition, variants of the coupled model will be used to perform experiments examining resolution requirements and coupling strategies for land-atmosphere coupling in a heterogeneous environment.

Gutowski, W.J. Jr.

1993-01-01T23:59:59.000Z

311

Evaluation of Land-Atmosphere Interactions in Models of the North American Monsoon.  

E-Print Network (OSTI)

??Improving diurnal errors in surface-based heating processes in models might be a promising step towards improved seasonal simulation of the North American Monsoon (NAM). This… (more)

Kelly, Patrick

2008-01-01T23:59:59.000Z

312

Coverage Dependent Charge Reduction of Cationic Gold Clusters on Surfaces Prepared Using Soft Landing of Mass-selected Ions  

Science Conference Proceedings (OSTI)

The ionic charge state of monodisperse cationic gold clusters on surfaces may be controlled by selecting the coverage of mass-selected ions soft landed onto a substrate. Polydisperse diphosphine-capped gold clusters were synthesized in solution by reduction of chloro(triphenylphosphine)gold(I) with borane tert-butylamine in the presence of 1,3-bis(diphenylphosphino)propane. The polydisperse gold clusters were introduced into the gas phase by electrospray ionization and mass selection was employed to select a multiply charged cationic cluster species (Au11L53+, m/z = 1409, L = 1,3-bis(diphenylphosphino)propane) which was delivered to the surfaces of four different self-assembled monolayers on gold (SAMs) at coverages of 1011 and 1012 clusters/mm2. Employing the spatial profiling capabilities of in-situ time-of-flight secondary ion mass spectrometry (TOF-SIMS) it is shown that, in addition to the chemical functionality of the monolayer (as demonstrated previously: ACS Nano, 2012, 6, 573) the coverage of cationic gold clusters on the surface may be used to control the distribution of ionic charge states of the soft-landed multiply charged clusters. In the case of a 1H,1H,2H,2H-perfluorodecanethiol SAM (FSAM) almost complete retention of charge by the deposited Au11L53+ clusters was observed at a lower coverage of 1011 clusters/mm2. In contrast, at a higher coverage of 1012 clusters/mm2, pronounced reduction of charge to Au11L52+ and Au11L5+ was observed on the FSAM. When soft landed onto 16- and 11-mercaptohexadecanoic acid surfaces on gold (16,11-COOH-SAMs), the mass-selected Au11L53+ clusters exhibited partial reduction of charge to Au11L52+ at lower coverage and additional reduction of charge to both Au11L52+ and Au11L5+ at higher coverage. The reduction of charge was found to be more pronounced on the surface of the shorter (thinner) C11 than the longer (thicker) C16-COOH-SAM. On the surface of the 1-dodecanethiol (HSAM) monolayer, the most abundant charge state was found to be Au11L52+ at lower coverage and Au11L5+ at higher coverage, respectively. A coverage-dependent electron tunneling mechanism is proposed to account for the observed reduction of charge of mass-selected multiply charged gold clusters soft landed on SAMs. The results demonstrate that one of the critical parameters that influence the chemical and physical properties of supported metal clusters, ionic charge state, may be controlled by selecting the coverage of charged species soft landed onto surfaces.

Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

2012-11-29T23:59:59.000Z

313

Estimating Spatial Variability in Atmospheric Properties over Remotely Sensed Land Surface Conditions  

Science Conference Proceedings (OSTI)

This paper investigates the spatial relationships between surface fluxes and near-surface atmospheric properties (AP), and the potential errors in flux estimation due to homogeneous atmospheric inputs over heterogeneous landscapes. A large-eddy ...

Giacomo Bertoldi; William P. Kustas; John D. Albertson

2008-08-01T23:59:59.000Z

314

The Representation of Arctic Soils in the Land Surface Model: The Importance of Mosses  

Science Conference Proceedings (OSTI)

Mosses dominate the surface cover in high northern latitudes and have the potential to play a key role in modifying the thermal and hydrologic regime of Arctic soils. These modifications in turn feed back to influence surface energy exchanges and ...

Jason Beringer; Amanda H. Lynch; F. Stuart Chapin III; Michelle Mack; Gordon B. Bonan

2001-08-01T23:59:59.000Z

315

Comparison of avian species diversity and densities on non-mined and reclaimed surface-mined land in east-central Texas  

E-Print Network (OSTI)

Surface mining often changes the native landscape and vegetation of an area. Reclamation is used to counter this change, with the goal of restoring the land to its original pre-mined state. The process of reclamation creates early successional-stage lands, such as grasslands, shrublands, and wetlands, attracting new plant and animal species to the area. I compared avian species density (number of individuals/ha), diversity (H'), and richness (number of species/ha) on reclaimed and non-mined lands at TXU's Big Brown Mine in Fairfield, Texas. I also compared my results to those of a previous study conducted 25 years earlier. Avian counts were conducted using a fixedradius point-count method on 240 points placed in four different vegetation types and in four land-age groups (time since being reclaimed). Vegetation was measured both locally, and at a landscape level. Overall bird species density did not exhibit a clear relationship on non-mined versus reclaimed land. Overall bird species diversity was greater on non-mined lands, whereas overall species richness was greater on reclaimed lands. My results demonstrated a lower mean/point bird density and higher mean/point bird diversity than were found 25 years earlier. Different nesting guilds occurred on the reclaimed lands than occurred on the non-mined lands. Results suggested different species were attracted to the several successional stages of reclaimed lands over the nonmined lands, which consisted of climax vegetation. The different successional stages of reclaimed lands increased overall diversity and richness of the landscape as a whole. Five bird species of conservation concern were observed in the study, all of which occurred on reclaimed land. Four of the five species primarily occurred on reclaimed lands. Future land management should include conserving different successional-stage lands to increase overall biotic diversity and richness of mined land, preserving reclaimed habitat for species of concern, and educating future private landowners on the importance of maintaining vegetative and bird species diversity.

Wenzel, Dawn Nicole

2006-08-01T23:59:59.000Z

316

The Diurnal Cycle of Land–Atmosphere Interactions across Oklahoma’s Winter Wheat Belt  

Science Conference Proceedings (OSTI)

This manuscript documents the impact of Oklahoma’s winter wheat belt (WWB) on the near-surface atmosphere by comparing the diurnal cycle of meteorological conditions within the WWB relative to conditions in adjacent counties before and after the ...

Matthew J. Haugland; Kenneth C. Crawford

2005-01-01T23:59:59.000Z

317

Air, Sea, and Land Interactions of the Continental U.S. Hydroclimate  

Science Conference Proceedings (OSTI)

Multidecadal simulations over the continental United States by an atmospheric general circulation model coupled to an ocean general circulation model is compared with that forced by observed sea surface temperature (SST). The differences in the ...

Vasubandhu Misra; P. A. Dirmeyer

2009-04-01T23:59:59.000Z

318

An Approach for the Representation of Surface Heterogeneity in Land Surface Models. Part II: Validation and Sensitivity Experiments  

Science Conference Proceedings (OSTI)

This paper discusses a series of sensitivity experiments aimed at testing the surface heterogeneity representation proposed in the companion paper by Giorgi. When driven by observed climatic forcings at three locations and run in point mode, the ...

Filippo Giorgi

1997-08-01T23:59:59.000Z

319

Climate and Energy-Water-Land System Interactions Technical Report to the U.S. Department of Energy in Support of the National Climate Assessment  

Science Conference Proceedings (OSTI)

This report provides a framework to characterize and understand the important elements of climate and energy-water-land (EWL) system interactions. It identifies many of the important issues, discusses our understanding of those issues, and presents a long-term research program research needs to address the priority scientific challenges and gaps in our understanding. Much of the discussion is organized around two discrete case studies with the broad themes of (1) extreme events and (2) regional intercomparisons. These case studies help demonstrate unique ways in which energy-water-land interactions can occur and be influenced by climate.

Skaggs, Richard; Hibbard, Kathleen A.; Frumhoff, Peter; Lowry, Thomas; Middleton, Richard; Pate, Ron; Tidwell, Vincent C.; Arnold, J. G.; Averyt, Kristen; Janetos, Anthony C.; Izaurralde, Roberto C.; Rice, Jennie S.; Rose, Steven K.

2012-03-01T23:59:59.000Z

320

Analytical Land–Atmosphere Radiometer Model  

Science Conference Proceedings (OSTI)

Conversion of radiometric land surface temperature (?r) to an equivalent isothermal (aerodynamic) surface temperature (?i) is important in balancing the land surface energy budget with satellite-based ?r measurements. An analytical land–...

Ayman Suleiman; Richard Crago

2002-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

The Sensitivity of Regional Transpiration to Land-Surface Characteristics: Significance of Feedback  

Science Conference Proceedings (OSTI)

Several authors have determined the sensitivity of transpiration to different environmental parameters using the Penman-Monteith equation. In their studies the interaction between transpiration and, for example, the humidity of the air is ignored:...

C. M. J. Jacobs; H. A. R. De Bruin

1992-07-01T23:59:59.000Z

322

Estimation of Land Surface Heat Fluxes over the Tibetan Plateau Using GMS Data  

Science Conference Proceedings (OSTI)

A Surface Energy Balance System (SEBS) originally developed for the NOAA Advanced Very High Resolution Radiometer was applied to Geostationary Meteorological Satellite (GMS)-5 Visible/Infrared Spin-Scan Radiometer data that were supplemented with ...

Yuichiro Oku; Hirohiko Ishikawa; Zhongbo Su

2007-02-01T23:59:59.000Z

323

A Global Database of Land Surface Parameters at 1-km Resolution in Meteorological and Climate Models  

Science Conference Proceedings (OSTI)

Ecoclimap, a new complete surface parameter global dataset at a 1-km resolution, is presented. It is intended to be used to initialize the soil–vegetation–atmosphere transfer schemes (SVATs) in meteorological and climate models (at all horizontal ...

Valéry Masson; Jean-Louis Champeaux; Fabrice Chauvin; Christelle Meriguet; Roselyne Lacaze

2003-05-01T23:59:59.000Z

324

An Analytical Hydrological Model for the Study of Scaling Issues in Land Surface Modeling  

Science Conference Proceedings (OSTI)

Besides the atmospheric forcing such as solar radiation input and precipitation, the heterogeneity of the surface cover also plays an important role, especially in the distribution characteristics of the latent heat flux (LE). In this study, ...

Diandong Ren; Ann Henderson-Sellers

2006-12-01T23:59:59.000Z

325

Global Soil Moisture from Satellite Observations, Land Surface Models, and Ground Data: Implications for Data Assimilation  

Science Conference Proceedings (OSTI)

Three independent surface soil moisture datasets for the period 1979–87 are compared: 1) global retrievals from the Scanning Multichannel Microwave Radiometer (SMMR), 2) global soil moisture derived from observed meteorological forcing using the ...

Rolf H. Reichle; Randal D. Koster; Jiarui Dong; Aaron A. Berg

2004-06-01T23:59:59.000Z

326

A Physically Based Runoff Routing Model for Land Surface and Earth System Models  

Science Conference Proceedings (OSTI)

A new physically based runoff routing model, called the Model for Scale Adaptive River Transport (MOSART), has been developed to be applicable across local, regional, and global scales. Within each spatial unit, surface runoff is first routed ...

Hongyi Li; Mark S. Wigmosta; Huan Wu; Maoyi Huang; Yinghai Ke; André M. Coleman; L. Ruby Leung

2013-06-01T23:59:59.000Z

327

Retrieving Winds in the Surface Layer over Land Using an Airborne Doppler Lidar  

Science Conference Proceedings (OSTI)

Airborne Doppler wind lidars are increasingly being used to measure winds in the lower atmosphere at higher spatial resolution than ever before. However, wind retrieval in the range gates closest to the earth’s surface remains problematic. When a ...

K. S. Godwin; S. F. J. De Wekker; G. D. Emmitt

2012-04-01T23:59:59.000Z

328

Electrostatic Interaction of Heterogeneously Charged Surfaces with Semipermeable Membranes  

E-Print Network (OSTI)

In this paper we study the electrostatic interaction of a heterogeneously charged wall with a neutral semipermeable membrane. The wall consists of periodic stripes, where the charge density varies in one direction. The membrane is in a contact with a bulk reservoir of an electrolyte solution and separated from the wall by a thin film of salt-free liquid. One type of ions (small counterions) permeates into the gap and gives rise to a distance-dependent membrane potential, which translates into a repulsive electrostatic disjoining pressure due to an overlap of counterion clouds in the gap. To quantify it we use two complementary approaches. First, we propose a mean-field theory based on a linearized Poisson-Boltzmann equation and Fourier analysis. These calculations allow us to estimate the effect of a heterogeneous charge pattern at the wall on the induced heterogeneous membrane potential, and the value of the disjoining pressure as a function of the gap. Second, we perform Langevin dynamics simulations of the same system with explicit ions. The results of the two approaches are in good agreement with each other at low surface charge and small gap, but differ due to nonlinearity at the higher charge. These results demonstrate that a heterogeneity of the wall charge can lead to a huge reduction in the electrostatic repulsion, which could dramatically facilitate a self-assembly in complex synthetic and biological systems.

Salim R. Maduar; Vladimir Lobaskin; Olga I. Vinogradova

2013-07-17T23:59:59.000Z

329

Variability in Large-Scale Water Balance with Land Surface-Atmosphere Interaction  

Science Conference Proceedings (OSTI)

Persistent and prolonged periods of dry or moist conditions are often evident in the interannual variability of continental-type climates This variability appears as fluctuations around several distinct and preferred moisture states. These ...

Dara Entekhabi; Ignacio Rodriguez-Iturbe; Rafael L. Bras

1992-08-01T23:59:59.000Z

330

A Statistical–Dynamical Parameterization of Interception and Land Surface–Atmosphere Interactions  

Science Conference Proceedings (OSTI)

At a local scale, the interception capacity of the canopy depends on a variety of climatic and canopy factors. Of particular importance is the intensity of rainfall—interception capacity varies inversely with rainfall intensity. At a field or ...

Jorge A. Ramírez; Sharika U. S. Senarath

2000-11-01T23:59:59.000Z

331

Observations of the ABL Structures over a Heterogeneous Land Surface during IHOP_2002  

Science Conference Proceedings (OSTI)

This study analyzes data collected by aircraft and surface flux sites over a 60-km north–south-oriented aircraft track for five fair-weather days during the International H2O Project (IHOP_2002) to investigate the atmospheric boundary layer (ABL) ...

Song-Lak Kang; Kenneth J. Davis; Margaret LeMone

2007-04-01T23:59:59.000Z

332

13.022 Surface Waves and their Interaction With Floating Bodies, Spring 2002  

E-Print Network (OSTI)

Introduces the physics and mathematical modeling of linear and nonlinear surface wave interactions with floating bodies, e.g., ships and offshore platforms. Surface wave theory, including linear and nonlinear effects in a ...

Sclavounos, Paul D.

333

Value of Incorporating Satellite-Derived Land Cover Data in MM5/PLACE for Simulating Surface Temperatures  

Science Conference Proceedings (OSTI)

The Parameterization for Land–Atmosphere–Cloud Exchange (PLACE) module is used within the Fifth-Generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) to determine the importance of individual land ...

Todd M. Crawford; David J. Stensrud; Franz Mora; James W. Merchant; Peter J. Wetzel

2001-10-01T23:59:59.000Z

334

Linking Boundary Layer Circulations and Surface Processes during FIFE 89. Part II: Maintenance of Secondary Circulation  

Science Conference Proceedings (OSTI)

Land–atmosphere interactions are examined for three different synoptic situations during a 21-day period in the course of the First ISLSCP (International Satellite Land Surface Climatology Project) Field Experiment 1989 to better understand the ...

Mickey M-K. Wai; Eric A. Smith

1998-04-01T23:59:59.000Z

335

Plasma-Surface Interactions During Tokamak Disruptions and Rapid Shutdowns (A26775)  

E-Print Network (OSTI)

Proceedings Of 19th International Conference On Plasma Surface Interactions In Controlled Fusion Devices, San Diego, CA, To Be Published In J. Nucl. Mater. (2011)19th International Conference on Plasma Surface Interactions in Controlled Fusion Devices San Diego California, US, 2010999618765

Hollmann, E.M.

2010-07-09T23:59:59.000Z

336

Coupling an Advanced Land Surface–Hydrology Model with the Penn State–NCAR MM5 Modeling System. Part II: Preliminary Model Validation  

Science Conference Proceedings (OSTI)

A number of short-term numerical experiments conducted by the Penn State–NCAR fifth-generation Mesoscale Model (MM5) coupled with an advanced land surface model, alongside the simulations coupled with a simple slab model, are verified with ...

Fei Chen; Jimy Dudhia

2001-04-01T23:59:59.000Z

337

The Impact of the Land Surface Physics in the Operational NCEP Eta Model on Simulating the Diurnal Cycle: Evaluation and Testing Using Oklahoma Mesonet Data  

Science Conference Proceedings (OSTI)

On 31 January 1996, the National Centers for Environmental Prediction/Environmental Modeling Center (NCEP/EMC) implemented a state-of-the-art land surface parameterization in the operational Eta Model. The purpose of this study is to evaluate and ...

Curtis H. Marshall; Kenneth C. Crawford; Kenneth E. Mitchell; David J. Stensrud

2003-10-01T23:59:59.000Z

338

Combining multiple depth cameras and projectors for interactions on, above and between surfaces  

Science Conference Proceedings (OSTI)

Instrumented with multiple depth cameras and projectors, LightSpace is a small room installation designed to explore a variety of interactions and computational strategies related to interactive displays and the space that they inhabit. LightSpace cameras ... Keywords: augmented reality, depth cameras, interactive spaces, surface computing, ubiquitous computing

Andrew D. Wilson; Hrvoje Benko

2010-10-01T23:59:59.000Z

339

Ubiquitous interaction - using surfaces in everyday environments as pointing devices  

Science Conference Proceedings (OSTI)

To augment everyday environments as interface to computing may lead to more accessible and inclusive user interfaces, exploiting affordances existing in the physical world for interaction with digital functionality. A major challenge for such interfaces ...

Albrecht Schmidt; Martin Strohbach; Kristof van Laerhoven; Hans-W. Gellersen

2002-10-01T23:59:59.000Z

340

Recompose - Direct and Gestural Interaction with an Actuated Surface  

E-Print Network (OSTI)

We present Recompose, a new system for manipulation of an actuated surface. By collectively utilizing the body as a tool for direct manipulation alongside gestural input for functional manipulation, we show how a user is ...

Leithinger, Daniel

Note: This page contains sample records for the topic "land surface interaction" 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

A Cooperative Atmosphere–Surface Exchange Study (CASES) Dataset for Analyzing and Parameterizing the Effects of Land Surface Heterogeneity on Area-Averaged Surface Heat Fluxes  

Science Conference Proceedings (OSTI)

A multiscale dataset that includes atmospheric, surface, and subsurface observations obtained from an observation network covering a region that has a scale order comparable to mesoscale and general circulation models is described and analyzed. ...

David N. Yates; Fei Chen; Margaret A. LeMone; Russell Qualls; Steven P. Oncley; Robert L. Grossman; Edward A. Brandes

2001-05-01T23:59:59.000Z

342

Surface interactions of cesium and boric acid with stainless steel  

SciTech Connect

In this report, the effects of cesium hydroxide and boric acid on oxidized stainless steel surfaces at high temperatures and near one atmosphere of pressure are investigated. This is the first experimental investigation of this chemical system. The experimental investigations were performed using a mass spectrometer and a mass electrobalance. Surfaces from the different experiments were examined using a scanning electron microscope to identify the presence of deposited species, and electron spectroscopy for chemical analysis to identify the species deposited on the surface. A better understanding of the equilibrium thermodynamics, the kinetics of the steam-accelerated volatilizations, and the release kinetics are gained by these experiments. The release rate is characterized by bulk vaporization/gas-phase mass transfer data. The analysis couples vaporization, deposition, and desorption of the compounds formed by cesium hydroxide and boric acid under conditions similar to what is expected during certain nuclear reactor accidents. This study shows that cesium deposits on an oxidized stainless steel surface at temperatures between 1000 and 1200 Kelvin. Cesium also deposits on stainless steel surfaces coated with boric oxide in the same temperature ranges. The mechanism for cesium deposition onto the oxide layer was found to involve the chemical reaction between cesium and chromate. Some revaporization in the cesium hydroxide-boric acid system was observed. It has been found that under the conditions given, boric acid will react with cesium hydroxide to form cesium metaborate. A model is proposed for this chemical reaction.

Grossman-Canfield, N.

1995-08-01T23:59:59.000Z

343

Interactive Crop Management in the Community Earth System Model (CESM1): Seasonal Influences on Land–Atmosphere Fluxes  

Science Conference Proceedings (OSTI)

The Community Earth System Model, version 1 (CESM1) is evaluated with two coupled atmosphere–land simulations. The CTRL (control) simulation represents crops as unmanaged grasses, while CROP represents a crop managed simulation that includes ...

Samuel Levis; Gordon B. Bonan; Erik Kluzek; Peter E. Thornton; Andrew Jones; William J. Sacks; Christopher J. Kucharik

2012-07-01T23:59:59.000Z

344

Interactions of Oxygen and Hydrogen on Pd(111) surface  

DOE Green Energy (OSTI)

The coadsorption and interactions of oxygen and hydrogen on Pd(1 1 1) was studied by scanning tunneling microscopy and density functional theory calculations. In the absence of hydrogen oxygen forms a (2 x 2) ordered structure. Coadsorption of hydrogen leads to a structural transformation from (2 x 2) to a ({radical}3 x {radical}3)R30 degree structure. In addition to this transformation, hydrogen enhances the mobility of oxygen. To explain these observations, the interaction of oxygen and hydrogen on Pd(1 1 1) was studied within the density functional theory. In agreement with the experiment the calculations find a total energy minimum for the oxygen (2 x 2) structure. The interaction between H and O atoms was found to be repulsive and short ranged, leading to a compression of the O islands from (2 x 2) to ({radical}3 x {radical}3)R30 degree ordered structure at high H coverage. The computed energy barriers for the oxygen diffusion were found to be reduced due to the coadsorption of hydrogen, in agreement with the experimentally observed enhancement of oxygen mobility. The calculations also support the finding that at low temperatures the water formation reaction does not occur on Pd(1 1 1).

Demchenko, D.O.; Sacha, G.M.; Salmeron, M.; Wang, L.-W.

2008-06-25T23:59:59.000Z

345

Surface energy balance and buoyancy response to shallow cumulus shading  

Science Conference Proceedings (OSTI)

The interactions surrounding the coupling between surface energy balance and a boundary layer with shallow cumuli are investigated using the National Center for Atmospheric Research’s large eddy simulation code coupled to the NOAH land surface ...

Fabienne Lohou; Edward G. Patton

346

Trends in Land Evapotranspiration over Canada for the Period 1960–2000 Based on In Situ Climate Observations and a Land Surface Model  

Science Conference Proceedings (OSTI)

An assessment of annual trends in actual evapotranspiration (AET) and associated meteorological inputs is performed at 101 locations across Canada with available long-term hourly surface climate observations to determine if AET in Canada is ...

Richard Fernandes; Vladimir Korolevych; Shusen Wang

2007-10-01T23:59:59.000Z

347

Evaluation and Comparison of Noah and Pleim–Xiu Land Surface Models in MM5 Using GÖTE2001 Data: Spatial and Temporal Variations in Near-Surface Air Temperature  

Science Conference Proceedings (OSTI)

In this study, the performance of two advanced land surface models (LSMs; Noah LSM and Pleim–Xiu LSM) coupled with the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5), version 3.7.2, ...

J-F. Miao; D. Chen; K. Borne

2007-10-01T23:59:59.000Z

348

Quasielastic He atom scattering from surfaces: A stochastic description of the dynamics of interacting adsorbates  

E-Print Network (OSTI)

The study of diffusion and low frequency vibrational motions of particles on metal surfaces is of paramount importance; it provides valuable information on the nature of the adsorbate-substrate and the substrate-substrate interactions. In particular, the experimental broadening observed in the diffusive peak with increasing coverage is usually interpreted in terms of a dipole-dipole like interaction among adsorbates via extensive molecular dynamics calculations within the Langevin framework. Here we present an alternative way to interpret this broadening by means of a purely stochastic description, namely the interacting single adsorbate approximation, where two noise sources are considered: (1) a Gaussian white noise accounting for the surface friction and temperature, and (2) a white shot noise replacing the interaction potential between adsorbates. Standard Langevin numerical simulations for flat and corrugated surfaces (with a separable potential) illustrate the dynamics of Na atoms on a Cu(100) surface w...

Martinez-Casado, R; Sanz, A S; Miret-Artés, S

2007-01-01T23:59:59.000Z

349

ORNL Workshop on Plasma-Surface Interactions for Fusion Oak Ridge, Tennessee, March 2123, 2005.  

E-Print Network (OSTI)

1 ORNL Workshop on Plasma-Surface Interactions for Fusion Oak Ridge, Tennessee, March 21­23, 2005-Huygens mission to Titan #12;5 Risk Assessment: 1. What is the potential impact of the problem? 2. How well

Princeton Plasma Physics Laboratory

350

Interaction of a Contact Resonance of Microspheres with Surface Acoustic Waves  

E-Print Network (OSTI)

We study the interaction of surface acoustic waves (SAWs) with a contact-based vibrational resonance of 1???m silica microspheres forming a two-dimensional granular crystal adhered to a substrate. The laser-induced transient ...

Boechler, Nicholas

351

Variation and Trends of Landscape Dynamics, Land Surface Phenology and Net Primary Production of the Appalachian Mountains  

Science Conference Proceedings (OSTI)

The gradients of the Appalachian Mountains in elevations and latitudes provide a unique regional perspective of landscape variations in the eastern United States and a section of the southeastern Canada. This study reveals patterns and trends of landscape dynamics, land surface phenology and ecosystem production along the Appalachian Mountains using time series data from Global Inventory Modeling and Mapping Studies (GIMMS) and AVHRR Global Production Efficiency Model (GloPEM) datasets. We analyzed the spatial and temporal patterns of Normalized Difference Vegetation Index (NDVI), length of growing season (LOS) and net primary production (NPP) of selected ecoregions along the Appalachian Mountains regions. We compared the results out of the Appalachian Mountains regions in different spatial contexts including the North America and the Appalachian Trail corridor area. To reveal latitudinal variations we analyzed data and compared the results between 30°N-40°N and 40°N-50°N latitudes. The result revealed significant decreases in annual peak NDVI in the Appalachian Mountains regions. The trend for the Appalachian Mountains regions was -0.0018 (R2=0.55, P<0.0001) NDVI unit decrease per year during 25 years between 1982 and 2006. The LOS had prolonged 0.3 day yr-1 during 25 years over the Appalachian Mountains regions. The NPP increased by 2.68 gC m-2yr-2 in Appalachian Mountains regions from 1981 to 2000. The comparison with the North America reveals the effects of topography and ecosystem compositions of the Appalachian Mountains. The comparison with the Appalachian Trail corridor area provides a regional mega-transect view of the measured variables.

Wang, Yeqiao; Zhao, Jianjun; Zhou, Yuyu; Zhang, Hongyan

2012-12-15T23:59:59.000Z

352

A Survey of Changes in Cloud Cover and Cloud Types over Land from Surface Observations, 1971–96  

Science Conference Proceedings (OSTI)

From a dataset of weather observations from land stations worldwide, about 5400 stations were selected as having long periods of record with cloud-type information; they cover all continents and many islands. About 185 million synoptic reports ...

Stephen G. Warren; Ryan M. Eastman; Carole J. Hahn

2007-02-01T23:59:59.000Z

353

A Long-Term Hydrologically Based Dataset of Land Surface Fluxes and States for the Conterminous United States  

Science Conference Proceedings (OSTI)

A frequently encountered difficulty in assessing model-predicted land–atmosphere exchanges of moisture and energy is the absence of comprehensive observations to which model predictions can be compared at the spatial and temporal resolutions at ...

E. P. Maurer; A. W. Wood; J. C. Adam; D. P. Lettenmaier; B. Nijssen

2002-11-01T23:59:59.000Z

354

The ISLSCP Initiative I Global Datasets: Surface Boundary Conditions and Atmospheric Forcings for Land-Atmosphere Studies  

Science Conference Proceedings (OSTI)

A comprehensive series of global datasets for land-atmosphere models has been collected, formatted to a common grid, and released on a set of CD-ROMS. This paper describes the motivation for and the, contents of the dataset.

P. J. Sellers; B. W. Meeson; J. Closs; J. Collatz; F. Corprew; D. Dazlich; F. G. Hall; Y. Kerr; R. Koster; S. Los; K. Mitchell; J. McManus; D. Myers; K-J. Sun; P. Try

1996-09-01T23:59:59.000Z

355

Use of Satellite-Based Precipitation Observation in Improving the Parameterization of Canopy Hydrological Processes in Land Surface Models  

Science Conference Proceedings (OSTI)

Precipitation exhibits significant spatial variability at scales much smaller than the typical size of climate model grid cells. Neglecting such subgrid-scale variability in climate models causes unrealistic representation of land–atmosphere flux ...

Dagang Wang; Guiling Wang; Emmanouil N. Anagnostou

2005-10-01T23:59:59.000Z

356

NASA Cold Land Processes Experiment (CLPX 2002/03): Ground-Based and Near-Surface Meteorological Observations  

Science Conference Proceedings (OSTI)

A short-term meteorological database has been developed for the Cold Land Processes Experiment (CLPX). This database includes meteorological observations from stations designed and deployed exclusively for CLPX as well as observations available ...

Kelly Elder; Angus Goodbody; Don Cline; Paul Houser; Glen E. Liston; Larry Mahrt; Nick Rutter

2009-02-01T23:59:59.000Z

357

The Interaction of a Surface Wave with Waves on a Diffuse Interface  

Science Conference Proceedings (OSTI)

A resonant interaction analysis is used to study the two-dimensional interaction of a surface wave with two waves on a diffuse interface in a stratified fluid. The fluid system is modeled as a combination of two homogenous finite-depth layers ...

Mirmosadegh Jamali; Brian Seymour

2004-01-01T23:59:59.000Z

358

HideOut: mobile projector interaction with tangible objects and surfaces  

Science Conference Proceedings (OSTI)

HideOut is a mobile projector-based system that enables new applications and interaction techniques with tangible objects and surfaces. HideOut uses a device mounted camera to detect hidden markers applied with infrared-absorbing ink. The ... Keywords: hidden, infrared, ink, interaction, marker, mobile, projector, tangible

Karl D. D. Willis; Takaaki Shiratori; Moshe Mahler

2013-02-01T23:59:59.000Z

359

Materials of interaction : responsive materials in the design of transformable interactive surfaces  

E-Print Network (OSTI)

Materials that embody computational properties are reshaping the ways in which we design, interact and communicate. This thesis looks at the topic of form transformation and how to bring the programmability and versatility ...

Coelho, Marcelo

2008-01-01T23:59:59.000Z

360

Speak up your mind: using speech to capture innovative ideas on interactive surfaces  

Science Conference Proceedings (OSTI)

This paper presents Vozze, a user interface that has been designed to speed up the process of recording and managing ideas and their associations during innovation activities. Vozze integrates three major concepts: multi-tactile surfaces, speech recognition, ... Keywords: innovation, interactive surfaces, multi-tactile interfaces, speech recognition, voice interfaces

Osvaldo Huerta; J. Alfredo Sánchez; Salvador Fuentes; Ofelia Cervantes

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Line Shape Broadening in Surface Diffusion of Interacting Adsorbates with Quasielastic He Atom Scattering  

E-Print Network (OSTI)

The experimental line shape broadening observed in adsorbate diffusion on metal surfaces with increasing coverage is usually related to the nature of the adsorbate-adsorbate interaction. Here we show that this broadening can also be understood in terms of a fully stochastic model just considering two noise sources: (i) a Gaussian white noise accounting for the surface friction, and (ii) a shot noise replacing the physical adsorbate-adsorbate interaction potential. Furthermore, contrary to what could be expected, for relatively weak adsorbate-substrate interactions the opposite effect is predicted: line shapes get narrower with increasing coverage.

R. Martinez-Casado; J. L. Vega; A. S. Sanz; S. Miret-Artes

2007-02-08T23:59:59.000Z

362

The Role of Land–Sea Topography in Blocking Formation in a Block–Eddy Interaction Model  

Science Conference Proceedings (OSTI)

This paper is an extension of a theoretical study by Luo on the effect of large-scale land–sea contrast (LSC) topography on the formation of an eddy-driven blocking. It is found that the topography term can be included explicitly in the blocking ...

Dehai Luo; Zhe Chen

2006-11-01T23:59:59.000Z

363

Evidence of acid-base interactions between amines and model indoor surfaces  

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

Evidence of acid-base interactions between amines and model indoor surfaces Evidence of acid-base interactions between amines and model indoor surfaces by ATR-FTIR spectroscopy Title Evidence of acid-base interactions between amines and model indoor surfaces by ATR-FTIR spectroscopy Publication Type Journal Article LBNL Report Number LBNL-63480 Year of Publication 2007 Authors Destaillats, Hugo, Brett C. Singer, and Lara A. Gundel Journal Atmospheric Environment Volume 41 Start Page Chapter Pagination 3177-3181 ISBN Number 1352-2310 Keywords acid-base, cellulose, gypsum, nicotine, pyridine, sorption, surface materials Abstract Molecular associations of pyridine with cellulose and gypsum, surrogates for common indoor surface materials, were studied using an attenuated total reflection (ATR)-Fourier transform infrared (FTIR) spectrophotometric method. The purpose of this study was to gain insight into the molecular interactions of amines with well-characterized materials that affect their partitioning between indoor air and surfaces. The experimental results suggest the presence of at least two sorptive states for volatile and semivolatile amines, attributed to the chemisorbed species and to a more labile surface state (i.e., physisorbed pyridine). Both exhibited spectroscopic signatures corresponding to aromatic C-H stretching modes (2950-3100 cm-1) in the studied spectral region. Chemisorbed pyridine could be identified by the presence of additional IR signals in the N-H and O-H stretching region of the spectrum (2900-3600 cm-1). During desorption under a stream of N2, surface enrichment in the chemisorbed species was evidenced by a slower reduction of the absorbance of the broad band at 2900-3600 cm-1 in relation to the total pyridine absorbance change. This spectroscopic evidence for acid-base interactions between amines and surfaces is consistent with the desorption behavior observed in previous work for nicotine from model surfaces.

364

Particle-Surface Interaction Databases in ALADDIN Format  

DOE Data Explorer (OSTI)

These databases are listed as recommended resources by CFADC. They represent older data and are not necessarily DOE-originated or funded. However, they are cited in the DOE Data Explorer because of their availability through a DOE Data Center. The citations for these databases are:

  • "Energy Dependence of Ion-Induced Sputtering Yields of Monatomic Solids in the Low Energy Region." N. Matsunami, Y. Yamamura, N. Itoh, H. Tawara, T. Kawamura. Report IPPJ-AM-52, Institute of Plasma Physics (National Institute for Fusion Science), Nagoya, Japan (1987)
  • "Energy Dependence of the Yields of Ion-Induced Sputtering of Monatomic Solids." N. Maksunami, Y. Yamaura, Y. Itikawa, N. Itoh, Y. Kazumata, S. Miyagawer, K. Morita, R. Strimizu, H. Tawara. Report IPPJ-AM-32, Institute of Plasma Physics (National Institute for Fusion Science), Nagoya, Japan (1988)
  • "Particle Reflection from Surfaces - A Recommended Data Base." E. W. Thomas, R. K. Janev and J. J. Smith. Report IAEA INDC(NDS)-249, July 1991
  • "Sputtering Data." W. Eckstein, C. Garcia-Rosales, J. Roth and W. Ottenberger. Max-Plank-Institute fur Plasmaphysik Report IPP9/82 (1993)
  • "An Evaluated Database for Sputtering." E. W. Thomas, R. K. Janev, J. Botero, J. J. Smith and Y. Qiu. Report IAEA INDC(NDS)-287 (1993)

365

The CSIRO Mk3L climate system model v1.0 coupled to the CABLE land surface scheme v1.4b: evaluation of the control climatology  

SciTech Connect

The CSIRO Mk3L climate system model, a reduced-resolution coupled general circulation model, has previously been described in this journal. The model is configured for millennium scale or multiple century scale simulations. This paper reports the impact of replacing the relatively simple land surface scheme that is the default parameterisation in Mk3L with a sophisticated land surface model that simulates the terrestrial energy, water and carbon balance in a physically and biologically consistent way. An evaluation of the new model s near-surface climatology highlights strengths and weaknesses, but overall the atmospheric variables, including the near-surface air temperature and precipitation, are simulated well. The impact of the more sophisticated land surface model on existing variables is relatively small, but generally positive. More significantly, the new land surface scheme allows an examination of surface carbon-related quantities including net primary productivity which adds significantly to the capacity of Mk3L. Overall, results demonstrate that this reduced-resolution climate model is a good foundation for exploring long time scale phenomena. The addition of the more sophisticated land surface model enables an exploration of important Earth System questions including land cover change and abrupt changes in terrestrial carbon storage.

Mao, Jiafu [ORNL; Phipps, S.J. [University of New South Wales; Pitman, A.J. [University of New South Wales; Wang, Yingping [CSIRO Marine and Atmospheric Research; Abramowitz, G. [University of New South Wales; Pak, B. [CSIRO Marine and Atmospheric Research

2011-01-01T23:59:59.000Z

366

Surface Wave–Turbulence Interactions. Scaling ?(z) near the Sea Surface  

Science Conference Proceedings (OSTI)

A freely rising profiler was used to collect vertical microstructure profiles in the upper oceanic boundary layer under various atmospheric and sea conditions. Near the sea surface, the rate of viscous dissipation of turbulence kinetic energy, ?, ...

A. Anis; J. N. Moum

1995-09-01T23:59:59.000Z

367

Interaction of silica nano-particles with a flat silica surface through neutron reflectometry  

SciTech Connect

Neutron reflectometry (NR) was employed to study the interaction of nanosized silica particles with a flat silica surface in aqueous solutions. Unlike other experimental tools that are used to study surface interactions, NR can provide information on the particle density profile in the solution near the interface. Two types of silica particles (25 and 100 nm) were suspended in aqueous solutions of varying ionic strength. Theoretical calculations of the surface interaction potential between a particle and a flat silica surface using the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory were compared to the experimental data. The theory predicts that the potential energy is highly dependent on the ionic strength. In high ionic strength solutions, NR reveals a high concentration of particles near the flat silica surface. Under the same conditions, theoretical calculations show an attractive force between a particle and a flat surface. For low ionic strength solutions, the particle concentration near the surface obtained from NR is the same as the bulk concentration, while depletion of particles near the surface is expected because of the repulsion predicted by the DLVO theory.

Chung, Eunhyea [Georgia Institute of Technology; Yiacoumi, Sotira [Georgia Institute of Technology; Halbert, Candice E [ORNL; Ankner, John Francis [ORNL; Wang, Wei [ORNL; Tsouris, Costas [ORNL

2012-01-01T23:59:59.000Z

368

Incoming Solar and Infrared Radiation Derived from METEOSAT: Impact on the Modeled Land Water and Energy Budget over France  

Science Conference Proceedings (OSTI)

The Land Surface Analysis Satellite Applications Facility (LSA SAF) project radiation fluxes, derived from the Meteosat Second Generation (MSG) geostationary satellite, were used in the Interactions between Soil, Biosphere, and Atmosphere (ISBA) ...

D. Carrer; S. Lafont; J.-L. Roujean; J.-C. Calvet; C. Meurey; P. Le Moigne; I. F. Trigo

2012-04-01T23:59:59.000Z

369

Mechanism of surface modification in the plasma-surface interaction in electrical arcs  

SciTech Connect

Electrical sparks and arcs are plasma discharges that carry large currents and can strongly modify surfaces. This damage usually comes in the form of micrometer-sized craters and frozen-in liquid on the surface. Using a combination of experiments, plasma and atomistic simulation tools, we now show that the observed formation of deep craters and liquidlike features during sparking in vacuum is explained by the impacts of energetic ions, accelerated under the given conditions in the plasma sheath to kiloelectron volt energies, on surfaces. The flux in arcs is so high that in combination with kiloelectron volt energies it produces multiple overlapping heat spikes, which can lead to cratering even in materials such as Cu, where a single heat spike normally does not.

Timko, H.; Djurabekova, F.; Nordlund, K.; Costelle, L.; Matyash, K.; Schneider, R.; Toerklep, A.; Arnau-Izquierdo, G.; Descoeudres, A.; Calatroni, S.; Taborelli, M.; Wuensch, W. [CERN, CH-1211 Geneve 23 (Switzerland); and Helsinki Institute of Physics and Department of Physics, University of Helsinki, P.O. Box 43, FIN-00014 Helsinki (Finland); Helsinki Institute of Physics and Department of Physics, University of Helsinki, P.O. Box 43, FIN-00014 Helsinki (Finland); Department of Physics, University of Helsinki, P.O. Box 43, FIN-00014 Helsinki (Finland); Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, Wendelsteinstrasse 1, D-17491 Greifswald (Germany); CERN, CH-1211 Geneve 23 (Switzerland)

2010-05-01T23:59:59.000Z

370

Synoptic Circulation and Land Surface Influences on Convection in the Midwest U.S. “Corn Belt” during the Summers of 1999 and 2000. Part II: Role of Vegetation Boundaries  

Science Conference Proceedings (OSTI)

In Part I of this observational study inquiring into the relative influences of “top down” synoptic atmospheric conditions and “bottom up” land surface mesoscale conditions in deep convection for the humid lowlands of the Midwest U.S. Central ...

Andrew M. Carleton; David J. Travis; Jimmy O. Adegoke; David L. Arnold; Steve Curran

2008-08-01T23:59:59.000Z

371

Improving land-surface model hydrology: Is an explicit aquifer model better than a deeper soil profile?  

E-Print Network (OSTI)

-Yue Niu,1 Pat J.-F. Yeh,4 and James Famiglietti4 Received 24 February 2007; revised 3 April 2007; accepted Community Land Model (CLM) we evaluate three parameterizations of vertical water flow: (1) a shallow soil variation in terrestrial water storage; and (3) a lumped, unconfined aquifer model coupled to the shallow

Yang, Zong-Liang

372

Modeling the Evolution of the Atmospheric Boundary Layer Coupled to the Land Surface for Three Contrasting Nights in CASES-99  

Science Conference Proceedings (OSTI)

The modeling and prediction of the stable boundary layer over land is a persistent, problematic feature in weather, climate, and air quality topics. Here, the performance of a state-of-the-art single-column boundary layer model is evaluated with ...

G. J. Steeneveld; B. J. H. van de Wiel; A. A. M. Holtslag

2006-03-01T23:59:59.000Z

373

Interactions Between the Daytime Mixed Layer and the Surface: Oklahoma Mesonet and EBBR Heat Fluxes  

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

Interactions Between the Daytime Mixed Layer Interactions Between the Daytime Mixed Layer and the Surface: Oklahoma Mesonet and EBBR Heat Fluxes R. L. Coulter Argonne National Laboratory Argonne, Illinois Introduction Surface layer estimates of surface sensible heat flux have been made at 10 - 14 locations within the Central Facility (CF) of the Southern Great Plains (SGP) Atmospheric Radiation Measurement (ARM) Program site by using energy balance Bowen ratio (EBBR) stations located mostly in uncultivated areas. The advent of the Oklahoma Mesonet (OKM) with approximately 50 stations within the boundaries of the Cloud and Radiation Testbed (CART) site that measure a variety of meteorological parameters leads to the possibility of using the OKM to provide additional estimates of surface energy budget to augment

374

Surface plasmon resonance label-free monitoring of antibody antigen interactions in real time  

SciTech Connect

Detection of biologically active compounds is one of the most important topics in molecular biology and biochemistry. One of the most promising detection methods is based on the application of surface plasmon resonance for label-free detection of biologically active compounds. This method allows one to monitor binding events in real time without labeling. The system can therefore be used to determine both affinity and rate constants for interactions between various types of molecules. Here, we describe the application of a surface plasmon resonance biosensor for label-free investigation of the interaction between an immobilized antigen bovine serum albumin (BSA) and antibody rabbit anti-cow albumin IgG1 (anti-BSA). The formation of a self-assembled monolayer (SAM) over a gold surface is introduced into this laboratory training protocol as an effective immobilization method, which is very promising in biosensing systems based on detection of affinity interactions. In the next step, covalent attachment via artificially formed amide bonds is applied for the immobilization of proteins on the formed SAM surface. These experiments provide suitable experience for postgraduate students to help them understand immobilization of biologically active materials via SAMs, fundamentals of surface plasmon resonance biosensor applications, and determination of non-covalent biomolecular interactions. The experiment is designed for master and/or Ph.D. students. In some particular cases, this protocol might be adoptable for bachelor students that already have completed an extended biochemistry program that included a background in immunology.

Kausaite, A. (Vilnius Univ., Lithuania); van Dijk, M. (Eco Chemie B.V., Utrecht, The Netherlands); Castrop, J. (Eco Chemie B.V., Utrecht, The Netherlands); Ramanaviciene, A. (Vilnius Univ., Lithuania); Baltrus, J.P.; Acaite, J. (Vilnius Univ., Lithuania); Ramanavicius, A. (Vilnius Univ., Lithuania)

2007-01-01T23:59:59.000Z

375

Interactions between radical growth precursors on plasma-deposited silicon thin-film surfaces  

SciTech Connect

We present a detailed analysis of the interactions between growth precursors, SiH{sub 3} radicals, on surfaces of silicon thin films. The analysis is based on a synergistic combination of density functional theory calculations on the hydrogen-terminated Si(001)-(2x1) surface and molecular-dynamics (MD) simulations of film growth on surfaces of MD-generated hydrogenated amorphous silicon (a-Si:H) thin films. In particular, the authors find that two interacting growth precursors may either form disilane (Si{sub 2}H{sub 6}) and desorb from the surface, or disproportionate, resulting in the formation of a surface dihydride (adsorbed SiH{sub 2} species) and gas-phase silane (SiH{sub 4}). The reaction barrier for disilane formation is found to be strongly dependent on the local chemical environment on the silicon surface and reduces (or vanishes) if one/both of the interacting precursors is/are in a ''fast diffusing state,'' i.e., attached to fivefold coordinated surface Si atoms. Finally, activation energy barriers in excess of 1 eV are obtained for two chemisorbed (i.e., bonded to a fourfold coordinated surface Si atom) SiH{sub 3} radicals. Activation energy barriers for disproportionation follow the same tendency, though, in most cases, higher barriers are obtained compared to disilane formation reactions starting from the same initial configuration. MD simulations confirm that disilane formation and disproportionation reactions also occur on a-Si:H growth surfaces, preferentially in configurations where at least one of the SiH{sub 3} radicals is in a ''diffusive state.'' Our results are in agreement with experimental observations and results of plasma process simulators showing that the primary source for disilane in low-power plasmas may be the substrate surface.

Bakos, Tamas; Valipa, Mayur S.; Maroudas, Dimitrios [Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-3110 (United States)

2007-03-21T23:59:59.000Z

376

Interaction of Epithelial Cells with Surfaces and Surfaces Decorated by Molecules  

E-Print Network (OSTI)

A detailed understanding of the interface between living cells and substrate materials is of rising importance in many fields of medicine, biology and biotechnology. Cells at interfaces often form epithelia. The physical barrier that they form is one of their main functions. It is governed by the properties of the networks forming the cytoskeleton systems and by cell-to-cell contacts. Different substrates with varying surface properties modify the migration velocity of the cells. On the one hand one can change the materials composition. Organic and inorganic materials induce differing migration velocities in the same cell system. Within the same class of materials, a change of the surface stiffness or of the surface energy modifies the migration velocity, too. For our cell adhesion studies a variety of different, homogeneous substrates were used (polymers, bio-polymers, metals, oxides). In addition, an effective lithographic method, Polymer Blend Lithography (PBL), is reported, to produce patterned Self-Assembled Monolayers (SAM) on solid substrates featuring two or three different chemical functionalities. This we achieve without the use of conventional lithography like e-beam or UV lithography, only by using self-organization. These surfaces are decorated with a Teflon-like and with an amino-functionalized molecular layer. The resulting pattern is a copy of a previously created self-organized polymer pattern, featuring a scalable lateral domain size in the sub-micron range down below 100 nanometers. The resulting monolayer pattern features a high chemical and biofunctional contrast with feature sizes in the range of cell adhesion complexes like e.g. focal adhesion points.

Daniele Martini; Othmar Marti; Michael Beil; T. Paust; C. Huang; M. Moosmann; J. Jin; T. Heiler; R. Gröger; Thomas Schimmel; Stefan Walheim

2013-03-02T23:59:59.000Z

377

Comparison of Water-Related Land Cover Types in Six 1-km Global Land Cover Datasets  

Science Conference Proceedings (OSTI)

Land cover classification is a fundamental and vital activity that is helpful for understanding natural dynamics and the human impacts of land surface processes. Available multiple 1-km global land cover datasets have been compared to identify ...

Tosiyuki Nakaegawa

2012-04-01T23:59:59.000Z

378

Infrared Continental Surface Emissivity Spectra and Skin Temperature Retrieved from IASI Observations over the Tropics  

Science Conference Proceedings (OSTI)

Land surface temperature and emissivity spectra are essential variables for improving models of the earth surface–atmosphere interaction or retrievals of atmospheric variables such as thermodynamic profiles, chemical composition, cloud and aerosol ...

Virginie Capelle; Alain Chédin; Eric Péquignot; Peter Schlüssel; Stuart M. Newman; Noelle A. Scott

2012-06-01T23:59:59.000Z

379

Estimation of Sensible and Latent Heat Fluxes from Soil Surface Temperature Using a Linear Air-Land Heat Transfer Model  

Science Conference Proceedings (OSTI)

The authors present a linearized model of the heat transfer between the soil layer and the atmosphere. Using this model, the moisture availability at the surface can be estimated from the diurnal variations of the soil surface temperature and ...

Fujio Kimura; Yugo Shimizu

1994-04-01T23:59:59.000Z

380

Quasielastic He atom scattering from surfaces: A stochastic description of the dynamics of interacting adsorbates  

E-Print Network (OSTI)

The study of diffusion and low frequency vibrational motions of particles on metal surfaces is of paramount importance; it provides valuable information on the nature of the adsorbate-substrate and the substrate-substrate interactions. In particular, the experimental broadening observed in the diffusive peak with increasing coverage is usually interpreted in terms of a dipole-dipole like interaction among adsorbates via extensive molecular dynamics calculations within the Langevin framework. Here we present an alternative way to interpret this broadening by means of a purely stochastic description, namely the interacting single adsorbate approximation, where two noise sources are considered: (1) a Gaussian white noise accounting for the surface friction and temperature, and (2) a white shot noise replacing the interaction potential between adsorbates. Standard Langevin numerical simulations for flat and corrugated surfaces (with a separable potential) illustrate the dynamics of Na atoms on a Cu(100) surface which fit fairly well to the analytical expressions issued from simple models (free particle and anharmonic oscillator) when the Gaussian approximation is assumed. A similar broadening is also expected for the frustrated translational mode peaks.

R. Martinez-Casado; J. L. Vega; A. S. Sanz; S Miret-Artes

2007-07-16T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces  

Science Conference Proceedings (OSTI)

We are pleased to host the ACM International Conference on Interactive Tabletops and Surfaces (ITS) 2009, to be held on November 23--25, 2009, in Banff, Alberta, Canada. ITS 2009 is the 4th event in a series of annual research workshops that began in ...

Gerald Morrison; Sriram Subramanian; Sheelagh Carpendale; Michael Haller; Stacey Scott

2009-11-01T23:59:59.000Z

382

Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces  

Science Conference Proceedings (OSTI)

We are pleased to host the ACM International Conference on Interactive Tabletops and Surfaces (ITS) 2011, held from 13th to 16th of November 2011, in Kobe, Japan. ITS 2011 is the 6th event in a series of annual research workshops and conferences that ...

Jun Rekimoto; Hideki Koike; Kentaro Fukuchi; Yoshifumi Kitamura; Daniel Wigdor

2011-11-01T23:59:59.000Z

383

Proceedings of the 2012 ACM international conference on Interactive tabletops and surfaces  

Science Conference Proceedings (OSTI)

We are pleased to welcome you to the ACM International Conference on Interactive Tabletops and Surfaces (ITS) 2012, held from November 11-14th, in Cambridge, Massachusetts. ITS 2012 marks the 7th anniversary of a series of annual research workshops ...

Orit Shaer; Chia Shen; Meredith Ringel Morris; Michael Horn

2012-11-01T23:59:59.000Z

384

Proceedings of the 2013 ACM international conference on Interactive tabletops and surfaces  

Science Conference Proceedings (OSTI)

Welcome to the ACM International Conference on Interactive Tabletops and Surfaces (ITS 2013) in St Andrews, Scotland. This year ITS received a total of 121 valid submissions including 86 papers and 35 notes; this represents an increase of 16% over last ...

Aaron Quigley, Giulio Jacucci, Michael Horn, Miguel Nacenta

2013-10-01T23:59:59.000Z

385

Aerial Neutron Detection of Cosmic-Ray Interactions with the Earth's Surface  

SciTech Connect

We have demonstrated the ability to measure the neutron flux produced by the cosmic-ray interaction with nuclei in the ground surface using aerial neutron detection. High energy cosmic-rays (primarily muons with GeV energies) interact with the nuclei in the ground surface and produce energetic neutrons via spallation. At the air-surface interface, the neutrons produced by spallation will either scatter within the surface material, become thermalized and reabsorbed, or be emitted into the air. The mean free path of energetic neutrons in air can be hundreds of feet as opposed to a few feet in dense materials. As such, the flux of neutrons escaping into the air provides a measure of the surface nuclei composition. It has been demonstrated that this effect can be measured at long range using neutron detectors on low flying helicopters. Radiological survey measurements conducted at Government Wash in Las Vegas, Nevada, have shown that the neutron background from the cosmic-soil interactions is repeatable and directly correlated to the geological data. Government Wash has a very unique geology, spanning a wide variety of nuclide mixtures and formations. The results of the preliminary measurements are presented.

Richard Maurer

2008-09-18T23:59:59.000Z

386

Aerial Neutron Detection of Cosmic-Ray Interactions with the Earth's Surface  

SciTech Connect

We have demonstrated the ability to measure the neutron flux produced by the cosmic-ray interaction with nuclei in the ground surface using aerial neutron detection. High energy cosmic-rays (primarily muons with GeV energies) interact with the nuclei in the ground surface and produce energetic neutrons via spallation. At the air-surface interface, the neutrons produced by spallation will either scatter within the surface material, become thermalized and reabsorbed, or be emitted into the air. The mean free path of energetic neutrons in air can be hundreds of feet as opposed to a few feet in dense materials. As such, the flux of neutrons escaping into the air provides a measure of the surface nuclei composition. It has been demonstrated that this effect can be measured at long range using neutron detectors on low flying helicopters. Radiological survey measurements conducted at Government Wash in Las Vegas, Nevada, have shown that the neutron background from the cosmic-soil interactions is repeatable and directly correlated to the geological data. Government Wash has a very unique geology, spanning a wide variety of nuclide mixtures and formations. The results of the preliminary measurements are presented.

Richard Maurer

2008-09-18T23:59:59.000Z

387

The Surface Expression of Semidiurnal Internal Tides near a Strong Source at Hawaii. Part II: Interactions with Mesoscale Currents  

Science Conference Proceedings (OSTI)

Observations of semidiurnal surface currents in the Kauai Channel, Hawaii, are interpreted in the light of the interaction of internal tides with energetic surface-intensified mesoscale currents. The impacts on internal tide propagation of a ...

C. Chavanne; P. Flament; D. Luther; K-W. Gurgel

2010-06-01T23:59:59.000Z

388

A New Scheme for Effective Roughness Length and Effective Zero-Plane Displacement in Land Surface Models  

Science Conference Proceedings (OSTI)

Based on the similarity theory of the atmospheric surface layer and the flux conservation and mass conservation laws, a new scheme for determining the effective roughness length (ERL) and the effective zero-plane displacement (EZPD) for a ...

Zhong Zhong; Wei Lu; Shuai Song; Yaocun Zhang

2011-12-01T23:59:59.000Z

389

Relative Controls of Asian–Pacific Summer Climate by Asian Land and Tropical–North Pacific Sea Surface Temperature  

Science Conference Proceedings (OSTI)

The dominant pattern of summertime tropical and North Pacific sea surface temperature (SST) is characterized by an out-of-phase relationship between the tropics and the extratropics. This pattern, defined as the tropical–North Pacific mode (TNPM) ...

Ping Zhao; Song Yang; Maoqiu Jian; Junming Chen

2011-08-01T23:59:59.000Z

390

Sequential Assimilation of ERS-1 SAR Data into a Coupled Land Surface–Hydrological Model Using an Extended Kalman Filter  

Science Conference Proceedings (OSTI)

A first attempt to sequentially assimilate European Space Agency (ESA) Remote Sensing Satellite (ERS) synthetic aperture radar (SAR) estimations of surface soil moisture in the production scheme of a lumped rainfall–runoff model has been ...

C. Francois; A. Quesney; C. Ottlé

2003-04-01T23:59:59.000Z

391

Multidataset Study of Optimal Parameter and Uncertainty Estimation of a Land Surface Model with Bayesian Stochastic Inversion and Multicriteria Method  

Science Conference Proceedings (OSTI)

This study evaluates the ability of Bayesian stochastic inversion (BSI) and multicriteria (MC) methods to search for the optimal parameter sets of the Chameleon Surface Model (CHASM) using prescribed forcing to simulate observed sensible and ...

Youlong Xia; Mrinal K. Sen; Charles S. Jackson; Paul L. Stoffa

2004-10-01T23:59:59.000Z

392

A General Interface between an Atmospheric General Circulation Model and Underlying Ocean and Land Surface Models: Delocalized Physics Scheme  

Science Conference Proceedings (OSTI)

In order to represent in a most adequate way the various feedback mechanisms that govern the atmosphere–ocean or atmosphere–surface couplings, a “delocalized physics” method is introduced, in which the subgrid-scale physical parameterizations of ...

Augustin Vintzileos; Robert Sadourny

1997-05-01T23:59:59.000Z

393

Performance Assessment of a New Stationarity-based Parameter Estimation Method with a Simplified Land Surface Model Using In-situ and Remotely Sensed Surface States  

Science Conference Proceedings (OSTI)

We evaluate the performance of a new stationarity-based method for parameter estimation of a simple coupled water and energy balance model using in-situ and remotely sensed surface soil moisture (from AMSR-E) and surface temperature (from a ...

Jian Sun; Guido D. Salvucci

394

Numerical Modeling of Coupled Groundwater and Surface Water Interactions in an Urban Setting  

Science Conference Proceedings (OSTI)

The Dominguez Channel Watershed (DCW), located in the southern portion of Los Angeles County (Figure A.1), drains about 345 square miles into the Los Angeles Harbor. The cities and jurisdictions in DCW are shown in Figure A.2. The largest of these include the cities of Los Angeles, Carson, and Torrance. This watershed is unique in that 93% of its land area is highly developed (i.e. urbanized). The watershed boundaries are defined by a complex network of storm drains and flood control channels, rather than being defined by natural topography. Table (1) shows a summary of different land uses in the Dominguez Channel Watershed (MEC, 2004). The Dominguez Watershed has the highest impervious area of all watersheds in the Los Angeles region. The more impervious the surface, the more runoff is generated during a storm. Storm water runoff can carry previously accumulated contaminants and transport them into receiving water systems. Point sources such as industrial wastewater and municipal sewage as well as urban runoff from commercial, residential, and industrial areas are all recognized as contributors to water quality degradation at DWC. Section 303(d) of the 1972 Federal Clean Water Act (CWA) requires states to identify and report all waters not meeting water quality standards and to develop action plans to pursue the water quality objectives. These plans specify the maximum amount of a given pollutant that the water body of concern can receive and still meet water quality standards. Such plans are called Total Maximum Daily Loads (TMDLs). TMDLs also specify allocations of pollutant loadings to point and non-point sources taking into account natural background pollutant levels. This demonstrates the importance of utilizing scientific tools, such as flow and transport models, to identify contaminant sources, understand integrated flow paths, and assess the effectiveness of water quality management strategies. Since overland flow is a very important component of the water balance and hydrology of DCW, a parallel, distributed watershed model that treats flow in groundwater and surface water in a dynamically coupled manner will be used to build a flow model of the watershed. This coupled model forms the basis for modeling and understanding the transport of contaminants through the Dominguez Channel Watershed, which can be used in designing and implementing TMDLs to manage the water quality in this basin. In this report, the coupled surface water-groundwater flow model of DCW will be presented. This flow model was calibrated against a storm that occurred in February 21st, 2004. The model and approach are explained further in the following sections.

Rihani, J F; Maxwell, R M

2007-09-26T23:59:59.000Z

395

The effect of surface and Coulomb interaction on the liquid-gas phase transition of finite nuclei  

E-Print Network (OSTI)

By means of the Furnstahl, Serot and Tang's model, the effects of surface tension and Coulomb interaction on the liquid-gas phase transition for finite nuclei are investigated. A limit pressure p-lim above which the liquid-gas phase transition cannot take place has been found. It is found that comparing to the Coulomb interaction, the contribution of surface tension is dominate in low temperature regions. The binodal surface is also addressed.

W. L. Qian; Ru-Keng Su; H. Q. Song

2001-07-12T23:59:59.000Z

396

Dynamics of Plasma-Surface Interactions using In-situ Ion Beam Analysis  

SciTech Connect

The overall goal of this proposal was to develop an innovative experimental facility that would allow for the measurement of real-time response of a material surface to plasma bombardment by employing in-situ high-energy ion beam analysis. This facility was successfully developed and deployed at U. Wisconsin-Madison and was named DIONISOS (Dynamics of IONic Implantation & Sputtering on Surfaces). There were several major highlights to the DIONISOS research which we will briefly highlight below. The full technical details of the DIONISOS development, deployment and research results are contained in the Appendices which contain several peer-reviewed publications and a PhD thesis devoted to DIONISOS. The DIONISOS results on deuterium retention in molybdenum were chosen as an invited talk at the 2008 International Conference on Plasma-Surface Interactions in Toledo, Spain.

D.G. Whyte

2009-07-16T23:59:59.000Z

397

The land use climate change energy nexus  

SciTech Connect

Landscape ecology focuses on the spatial patterns and processes of ecological and human interactions. These patterns and processes are being altered both by changing human resource-management practices and changing climate conditions associated, in part, with increases in atmospheric concentrations of greenhouse gases. Dominant resource extraction and land management activities involve energy, and the use of fossil energy is one of the key drivers behind increasing greenhouse gas emissions as well as land-use changes. Alternative energy sources (such as wind, solar, nuclear, and bioenergy) are being explored to reduce greenhouse gas emission rates. Yet, energy production, including alternative-energy options, can have a wide range of effects on land productivity, surface cover, albedo, and other factors that affect carbon, water and energy fluxes and, in turn, climate. Meanwhile, climate influences the potential output, relative efficiencies and sustainability of alternative energy sources. Thus climate change, energy choices, and land-use change are linked, and any analysis in landscape ecology that considers one of these factors should consider them all. This analysis explores the implications of those linkages and points out ecological patterns and processes that may be affected by these interactions.

Dale, Virginia H [ORNL; Efroymson, Rebecca Ann [ORNL; Kline, Keith L [ORNL

2011-01-01T23:59:59.000Z

398

Interaction of highly vibrationally excited molecules with clean metal surfaces. Final technical report  

DOE Green Energy (OSTI)

The authors present results from a grant funded under the Department of Energy Office of Basic Energy Sciences. A collaboration between Prof. Alec Wodtke of the Department of Chemistry at UCSB and Daniel J. Auerbach of IBM Almaden Research Labs has allowed new experiments on the dynamics of surface chemical reactivity to be successfully executed. High quality data has been generated which provides an excellent test of theoretical models of surface reactivity, a topic of importance to catalysis. The authors have obtained the first experimental measurements on the influence of reactant velocity on the steric effect in a chemical reaction: the dissociative adsorption of hydrogen on copper. They have also designed and built a molecular beam scattering apparatus for the study of highly vibrationally excited molecules and their interactions with clean and oxidized metal surfaces. With this apparatus they have observed the vibrational energy exchange of highly vibrationally excited NO with an oxidized copper surface. Multi-quantum vibrational relaxation was found ({Delta}v = 1-5). Such remarkably strong and efficient vibrational energy transfer represents a qualitatively new phenomenon and is representative of the exciting new behavior that they had hoped might be observable in this project. Evidence of chemical reactivity of vibrationally excited NO on a clean copper surface was also found.

Wodtke, A.M. [Univ. of California, Santa Barbara, CA (United States). Dept. of Chemistry; Auerbach, D.J. [IBM Almaden Research Center, San Jose, CA (United States)

1998-11-01T23:59:59.000Z

399

Near-surface remote sensing of canopy architecture and land-atmosphere interactions in an oak savanna ecosystem  

E-Print Network (OSTI)

MODIS satellite data. Remote Sensing of Environment, 106,a joint flux tower, remote sensing and modelling analysis.of the algorithm. Remote Sensing of Environment, 110,

Ryu, Youngryel

2010-01-01T23:59:59.000Z

400

The Global Land Data Assimilation System  

Science Conference Proceedings (OSTI)

A Global Land Data Assimilation System (GLDAS) has been developed. Its purpose is to ingest satellite- and ground-based observational data products, using advanced land surface modeling and data assimilation techniques, in order to generate ...

M. Rodell; P. R. Houser; U. Jambor; J. Gottschalck; K. Mitchell; C-J. Meng; K. Arsenault; B. Cosgrove; J. Radakovich; M. Bosilovich; J. K. Entin*J. P. Walker; D. Lohmann; D. Toll

2004-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Role of Polymer Segment?Particle Surface Interactions in Controlling Nanoparticle Dispersions in Concentrated Polymer Solutions  

SciTech Connect

The microstructure of particles suspended in concentrated polymer solutions is examined with small-angle X-ray scattering and small-angle neutron scattering. Of interest are changes to long wavelength particle density fluctuations in ternary mixtures of silica nanoparticles suspended in concentrated solutions of poly(ethylene glycol). The results are understood in terms of application of the pseudo-two-component polymer reference interaction site model (PRISM) theory modified to account for solvent addition via effective contact strength of interfacial attraction, {var_epsilon}{sub pc}, in an implicit manner. The combined experimental-theoretical study emphasizes the complex interactions between solvent, polymer, and particle surface that control particle miscibility but also demonstrate that these factors can all be understood in terms of variations of {var_epsilon}{sub pc}.

Kim, So Youn; Zukoski, Charles F. (UIUC)

2013-05-08T23:59:59.000Z

402

EOS Land Validation Project  

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

EOS Land Validation The EOS Land Validation Project Overview EOS Land Validation Logo The objective of the EOS Land Validation Project is to achieve consistency, completeness,...

403

An Interactive Method for Processing and Display of Sea-Surface Temperature Fields Using VAS Multispectral Data  

Science Conference Proceedings (OSTI)

A technique for interactively producing sea-surface temperatures (SST)from VAS multispectral radiance observations and displaying the derived field is outlined. High-resolution composite images using data from several times per day and over a ...

John J. Bates; William L. Smith; Gary S. Wade; Harold M. Woo1f

1987-06-01T23:59:59.000Z

404

Ozone-surface interactions: Investigations of mechanisms, kinetics, mass transport, and implications for indoor air quality  

SciTech Connect

In this dissertation, results are presented of laboratory investigations and mathematical modeling efforts designed to better understand the interactions of ozone with surfaces. In the laboratory, carpet and duct materials were exposed to ozone and measured ozone uptake kinetics and the ozone induced emissions of volatile organic compounds. To understand the results of the experiments, mathematical methods were developed to describe dynamic indoor aldehyde concentrations, mass transport of reactive species to smooth surfaces, the equivalent reaction probability of whole carpet due to the surface reactivity of fibers and carpet backing, and ozone aging of surfaces. Carpets, separated carpet fibers, and separated carpet backing all tended to release aldehydes when exposed to ozone. Secondary emissions were mostly n-nonanal and several other smaller aldehydes. The pattern of emissions suggested that vegetable oils may be precursors for these oxidized emissions. Several possible precursors and experiments in which linseed and tung oils were tested for their secondary emission potential were discussed. Dynamic emission rates of 2-nonenal from a residential carpet may indicate that intermediate species in the oxidation of conjugated olefins can significantly delay aldehyde emissions and act as reservoir for these compounds. The ozone induced emission rate of 2-nonenal, a very odorous compound, can result in odorous indoor concentrations for several years. Surface ozone reactivity is a key parameter in determining the flux of ozone to a surface, is parameterized by the reaction probability, which is simply the probability that an ozone molecule will be irreversibly consumed when it strikes a surface. In laboratory studies of two residential and two commercial carpets, the ozone reaction probability for carpet fibers, carpet backing and the equivalent reaction probability for whole carpet were determined. Typically reaction probability values for these materials were 10{sup {minus}7}, 10{sup {minus}5}, and 10{sup {minus}5} respectively. To understand how internal surface area influences the equivalent reaction probability of whole carpet, a model of ozone diffusion into and reaction with internal carpet components was developed. This was then used to predict apparent reaction probabilities for carpet. He combines this with a modified model of turbulent mass transfer developed by Liu, et al. to predict deposition rates and indoor ozone concentrations. The model predicts that carpet should have an equivalent reaction probability of about 10{sup {minus}5}, matching laboratory measurements of the reaction probability. For both carpet and duct materials, surfaces become progressively quenched (aging), losing the ability to react or otherwise take up ozone. He evaluated the functional form of aging and find that the reaction probability follows a power function with respect to the cumulative uptake of ozone. To understand ozone aging of surfaces, he developed several mathematical descriptions of aging based on two different mechanisms. The observed functional form of aging is mimicked by a model which describes ozone diffusion with internal reaction in a solid. He shows that the fleecy nature of carpet materials in combination with the model of ozone diffusion below a fiber surface and internal reaction may explain the functional form and the magnitude of power function parameters observed due to ozone interactions with carpet. The ozone induced aldehyde emissions, measured from duct materials, were combined with an indoor air quality model to show that concentrations of aldehydes indoors may approach odorous levels. He shows that ducts are unlikely to be a significant sink for ozone due to the low reaction probability in combination with the short residence time of air in ducts.

Morrison, Glenn C.

1999-12-01T23:59:59.000Z

405

Validation of the Coupled NCEP Mesoscale Spectral Model and an Advanced Land Surface Model over the Hawaiian Islands. Part I: Summer Trade Wind Conditions and a Heavy Rainfall Event  

Science Conference Proceedings (OSTI)

Validations of the 10-km operational Regional Spectral Model (RSM) and the coupled Mesoscale Spectral Model (MSM) with an advanced land surface model (LSM) forecasts during a 1-month period from 20 May through 20 June 2002 are performed at three ...

Yongxin Zhang; Yi-Leng Chen; Song-You Hong; Hann-Ming Henry Juang; Kevin Kodama

2005-12-01T23:59:59.000Z

406

Simulation of ENSO-Related Surface Winds in the Tropical Pacific by an Atmospheric General Circulation Model Forced by Observed Sea Surface Temperatures  

Science Conference Proceedings (OSTI)

The authors present the simulation of the tropical Pacific surface wind variability by a low-resolution (R15 horizontal resolution and 18 vertical levels) version of the Center for Ocean-Land-Atmosphere Interactions, Maryland, general circulation ...

B. N. Goswami; V. Krishnamurthy; N. H. Saji

1995-06-01T23:59:59.000Z

407

Evaluation of Land Surface Models in Reproducing Satellite Derived Leaf Area Index over the High-Latitude Northern Hemisphere. Part II: Earth System Models  

E-Print Network (OSTI)

Abstract: Leaf Area Index (LAI) is a key parameter in the Earth System Models (ESMs) since it strongly affects land-surface boundary conditions and the exchange of matter and energy with the atmosphere. Observations and data products derived from satellite remote sensing are important for the validation and evaluation of ESMs from regional to global scales. Several decades ’ worth of satellite data products are now available at global scale which represents a unique opportunity to contrast observations against model results. The objective of this study is to assess whether ESMs correctly reproduce the spatial variability of LAI when compared with satellite data and to compare the length of the growing season in the different models with the satellite data. To achieve this goal we analyse outputs from 11 coupled carbon-climate models that are based on the set of new global model simulations planned in support of the IPCC Fifth Assessment Report. We focus on the average LAI and the length of the growing season on Northern Hemisphere over the period 1986–2005. Additionally we compare the results with previous analyses (Part I) of

Ro Anav; Guillermo Murray-tortarolo; Pierre Friedlingstein; Stephen Sitch; Shilong Piao; Zaichun Zhu

2013-01-01T23:59:59.000Z

408

Accounting for surface-groundwater interactions and their uncertainty in river and groundwater models: A case study in the Namoi River, Australia  

Science Conference Proceedings (OSTI)

Surface-groundwater (SW-GW) interactions constitute a critical proportion of the surface and groundwater balance especially during dry conditions. Conjunctive management of surface and groundwater requires an explicit account of the exchange flux between ... Keywords: Groundwater model, Groundwater pumping, Nonstationarity of low flows, River low flow, River model, Surface-groundwater interaction, Uncertainty analysis, eWater Source

David W. Rassam, Luk Peeters, Trevor Pickett, Ian Jolly, Linda Holz

2013-12-01T23:59:59.000Z

409

Turbulent Flux Transfer over Bare-Soil Surfaces: Characteristics and Parameterization  

Science Conference Proceedings (OSTI)

Parameterization of turbulent flux from bare-soil and undercanopy surfaces is imperative for modeling land–atmosphere interactions in arid and semiarid regions, where flux from the ground is dominant or comparable to canopy-sourced flux. This ...

Kun Yang; Toshio Koike; Hirohiko Ishikawa; Joon Kim; Xin Li; Huizhi Liu; Shaomin Liu; Yaoming Ma; Jieming Wang

2008-01-01T23:59:59.000Z

410

Biophysical Evaluation of Land-Cover Products for Land–Climate Modeling  

Science Conference Proceedings (OSTI)

The need for accurate characterization of the land surface as boundary conditions in climate models has been recognized widely in the climate modeling community. A large number of land-cover datasets are currently used in climate models either to ...

Jianjun Ge; Nathan Torbick; Jiaguo Qi

2009-06-01T23:59:59.000Z

411

Natural gas conversion to higher hydrocarbons using plasma interactions with surfaces. Final report  

DOE Green Energy (OSTI)

Experiments are reported in which a methane plasma is created, and the methyl ions and hydrogen ions are accelerated within a microchannel array so that they interact with neutral methane molecules on the inside surfaces of the microchannels. No catalysts are used, and the device operates at room temperature. Impact energies of the ions are in the range of 10 eV to greater than 100 eV, and the energy delivered in the interaction at the surfaces causes the production of larger hydrocarbon molecules, such as C{sub 2}H{sub 2}, C{sub 2}H{sub 4}, and C{sub 2}H{sub 6}, along with C{sub 3}, C{sub 4}, C{sub 5}m C{sub 6}, C{sub 7}m and C{sub 8} molecules. There is a decreasing percentage of larger molecules produced, in comparison with the C{sub 2} and C{sub 3} types. Conversion effectiveness is greater at higher pressure, due to the increased ionic activity. The yield of the higher hydrocarbons depends upon the external voltage used, and voltage can be used as a control parameter to adjust the output mixture proportions. A conversion energy of 2.59 kilowatt hours/killogram of output has been demonstrated, and a reduction of this by a factor of 10 is possible using known techniques. In batch experiments, the selectivity for C{sub 2} has varied from 47% to 88%, and selectivity for C{sub 6} has ranged from 0% to 12.8%. Other hydrocarbon selectivities also span a wide and useful range. The estimated costs for hydrocarbons produced with this technology are in the range of $200 per tonne, in production quantities, depending upon natural gas costs. Pilot production experiments are recommended to make these estimates more precise, and to address strategies for scaling the technology up to production levels. Applications are discussed.

Sackinger, W.M.; Kamath, V.A.; Morgan, B.L.; Airey, R.W.

1993-12-01T23:59:59.000Z

412

Land use and energy  

Science Conference Proceedings (OSTI)

This report provides estimates of the amount of land required by past and future energy development in the United States and examines major federal legislation that regulates the impact of energy facilities on land use. An example of one land use issue associated with energy development - the potential conflict between surface mining and agriculture - is illustrated by describing the actual and projected changes in land use caused by coal mining in western Indiana. Energy activities addressed in the report include extraction of coal, oil, natural gas, uranium, oil shale, and geothermal steam; uranium processing; preparation of synfuels from coal; oil refineries; fossil-fuel, nuclear, and hydro-electric power plants; biomass energy farms; and disposal of solid wastes generated during combustion of fossil fuels. Approximately 1.1 to 3.3 x 10/sup 6/ acres were devoted to these activities in the United States in 1975. As much as 1.8 to 2.0 x 10/sup 6/ additional acres could be required by 1990 for new, nonbiomass energy development. The production of grain for fuel ethanol could require an additional 16.9 to 55.7 x 10/sup 6/ acres by 1990. Federal laws that directly or indirectly regulate the land-use impacts of energy facilities include the National Environmental Protection Act, Clean Air Act, Federal Water Pollution Control Act, Surface Mining Control and Reclamation Act, and Coastal Zone Management Act. The major provisions of these acts, other relevant federal regulations, and similar state and local regulatons are described in this report. Federal legislation relating to air quality, water quality, and the management of public lands has the greatest potential to influence the location and timing of future energy development in the United States.

Robeck, K.E.; Ballou, S.W.; South, D.W.; Davis, M.J.; Chiu, S.Y.; Baker, J.E.; Dauzvardis, P.A.; Garvey, D.B.; Torpy, M.F.

1980-07-01T23:59:59.000Z

413

Evaluation of the New CNDV Option of the Community Land Model: Effects of Dynamic Vegetation and Interactive Nitrogen on CLM4 Means and Variability  

Science Conference Proceedings (OSTI)

The Community Land Model, version 4 (CLM4) includes the option to run the prognostic carbon–nitrogen (CN) model with dynamic vegetation (CNDV). CNDV, which simulates unmanaged vegetation, modifies the CN framework to implement plant biogeography ...

C. Kendra Gotangco Castillo; Samuel Levis; Peter Thornton

2012-06-01T23:59:59.000Z

414

Drilling Waste Management Fact Sheet: Land Application  

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

Land Application Land Application Fact Sheet - Land Application The objective of applying drilling wastes to the land is to allow the soil's naturally occurring microbial population to metabolize, transform, and assimilate waste constituents in place. Land application is a form of bioremediation, and is important enough to be described in its own fact sheet; other forms of bioremediation are described in a separate fact sheet. Several terms are used to describe this waste management approach, which can be considered both treatment and disposal. In general, land farming refers to the repeated application of wastes to the soil surface, whereas land spreading and land treatment are often used interchangeably to describe the one-time application of wastes to the soil surface. Some practitioners do not follow the same terminology convention, and may interchange all three terms. Readers should focus on the technologies rather than on the specific names given to each process.

415

Investigations of hydrogen/Li sub 2 O surface interactions via quantum chemical cluster methods  

DOE Green Energy (OSTI)

Both in-reactor and laboratory experiments on ceramic breeder materials have indicated that substantial enhancement of tritium release rate results when small amounts of H{sub 2} ({approximately}0.1%) are added to the He purge gas stream. Although a comprehensive understanding of this empirical fact is still lacking, it is expected that surface processes would play a major role in the release process. Despite its significant improvement in tritium release in ceramic breeders, the interaction of hydrogen with lithium containing oxide ceramic surfaces is still poorly understood. If previous experience from non-metallic catalysts can serve as a useful guide, the problem is likely to be non-trivial. At issue here is a sound physical-chemical description of the role played by hydrogen in enhancing tritium release. Only from such an understanding can one construct realistic models for the tritium release/inventory phenomena which have the reliability and predictive capability that are necessary for fusion reactor design in general and blanket design in particular. 17 refs., 3 figs.

Tam, S.W.; Wright, J.; Curtiss, L.A.; Johnson, C.E.

1989-01-01T23:59:59.000Z

416

Interaction of manganese(II) with the surface of calcite in dilute solutions and seawater  

DOE Green Energy (OSTI)

The interaction of Mn/sup 2 +/ with the surface of calcite in aqueous solutions is complex. In dilute solutions the Mn/sup 2 +/ is rapidly adsorbed, MnCO/sub 3/ nucleates on the calcite surface and then grows by a first order reaction with respect to the initial Mn/sup 2 +/ concentration. At higher ionic strengths, in NaCl solutions, the rate of these processes is slower, but the same general pattern persists. In solutions containing Mg/sup 2 +/, at the concentration of seawater and in seawater, the nucleation phase of the uptake process does not appear to occur. The long term uptake rate of Mn/sup 2 +/ on the surface of calcite in seawater is first order with respect to the disolved Mn/sup 2 +/ concentration. The rate constant is over 3 orders of magnitude smaller than that found in dilute Mg/sup 2 +/-free solutions. A probable explanation for the slower growith rate in seawater is that MnCO/sub 3/ is not nucleated on the calcite surface due to the presence of high Mg/sup 2 +/ concentrations. These, through site competition, prevent enough Mn/sup 2 +/ from being adsorbed to reach a critical concentration for MnCO/sub 3/ nucleation. This behavior is similar to that found for orthophosphate with calcite surfaces in dilute solutions and seawater. Measurements of the solubility of rhodochrosite in seawater gave results from an undersaturation approach to equilibrium in excellent agreement with those found in previous studies in dilute solutions. When equilibrium was approached from supersaturation, approximately 50 times more calcium was precipitated than Mn/sup 2 +/. The measured solubility was over twice that determined from undersaturation. It is possible that a Mn-calcite containing 25 to 30 mole percent MnCO/sub 3/ formed on the rhodochrosite from the supersaturated solutions. Consequently, it is doubtful that rhodochrosite controls the concentration of Mn/sup 2 +/ in calcium carbonate rich marine environments.

Franklin, M. L.; Morse, J. W.

1981-07-01T23:59:59.000Z

417

Predicting Generalized Ecosystem Groups with the NCAR CCM: First Steps towards an Interactive Biosphere  

Science Conference Proceedings (OSTI)

Canopy-plus-soil “big-leaf” models of the land surface now exist and are being incorporated in global climate models. These big-leaf models could be the basis for the incorporation of an interactive land biosphere into global models. However, ...

A. Henderson-Sellers

1990-09-01T23:59:59.000Z

418

Numerical Simulation of the Interaction between the Sea-Breeze Front and Horizontal Convective Rolls. Part I: Offshore Ambient Flow  

Science Conference Proceedings (OSTI)

A three-dimensional, cloud-resolving model is used to investigate the interaction between the sea-breeze circulation and boundary layer roll convection. Horizontal convective rolls (HCRs) develop over land in response to strong daytime surface ...

Peter S. Dailey; Robert G. Fovell

1999-05-01T23:59:59.000Z

419

Numerical Simulations of the Role of Land Surface Conditions in the Evolution and Structure of Summertime Thunderstorms over a Flat Highland  

Science Conference Proceedings (OSTI)

Numerical simulations of summertime thunderstorms over a flat highland (4700 m MSL), assuming the central Tibetan Plateau, were conducted with the use of a cloud-resolving nonhydrostatic model. This study was aimed at clarifying the role of land ...

Hiroyuki Yamada

2008-01-01T23:59:59.000Z

420

Air-Sea Interaction as a Propagator of Equatorial Ocean Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The westward propagation of equatorial sea surface temperature anomalies exceeds the surface drift velocity and is probably associated with propagating changes in the depth of the surface mixed layer and upper thermocline. These can be caused by ...

Eric B. Kraus; Howard P. Hanson

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

Distortion of low-frequency acoustic signals by interaction with the moving ocean surface  

E-Print Network (OSTI)

A moving upper boundary in ocean acoustics . . . . . . 1.21.3 Foundations for studying ocean surface wave in?uence onmodels . . . . . . . . . . . 1.3.2 Ocean surface wave

Lynch, Stephen Dennis

2008-01-01T23:59:59.000Z

422

Numerical modelling of dynamical interaction between seismic radiation and near-surface geological structures: a parallel approach  

Science Conference Proceedings (OSTI)

We investigate a faster and easier way to parallelise seismological codes able to simulate the dynamical interaction between seismic radiation and near-surface geological structures. This is important in assessing strong ground motion, in the mitigation ... Keywords: HPF, numerical modelling, openMP, parallel computing, seismic site effects

A. Caserta; V. Ruggiero; P. Lanucara

2002-11-01T23:59:59.000Z

423

Interaction of Streptavidin-Based Peptide-MHC Oligomers (Tetramers) with Cell-Surface T Cell Receptors  

E-Print Network (OSTI)

he binding of oligomeric peptide–MHC (pMHC) complexes to cell surface TCR can be considered to approximate TCR–pMHC interactions at cell-cell interfaces. In this study, we analyzed the equilibrium binding of streptavidin-based ...

Stone, Jennifer D.

424

Land Turtles  

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

Turtles Turtles Nature Bulletin No. 157 May 29, 1948 Forest Preserve District of Cook County William N. Erickson, President Roberts Mann, Supt. of Conservation LAND TURTLES Turtles are four-legged reptiles that originated before the dinosaurs appeared, some 175 million years ago. The distinguishing feature of the turtle is its shell, varying in shape and markings with the different species: an arched upper shell grown fast to the backbone, and a flat lower shell grown fast to the breastbone, the two connected on either side by a bony bridge. In some species, like the box turtles, the lower shell is hinged, enabling the animal to completely conceal its head, tail and limbs by closing the two shells together. Most turtles live in water all or part of the time, but all of them lay their eggs on land, and neither the nest nor the young is attended by the parents. Each species has its own method of nest construction, using the hind legs to dig a hole in the ground, but the eggs are covered and left to be hatched by the heat of the sun. The eggs are relished by many animals such as skunks and squirrels; the young, before their armor hardens, are devoured by birds, mammals, fishes and other turtles.

425

Biosphere-atmosphere interactions over semi-arid regions : modeling the role of mineral aerosols and irrigation in the regional climate system  

E-Print Network (OSTI)

This dissertation describes the role of land surface processes in shaping semi-arid climates, namely those of Southwest Asia and Northwest Africa. The interactions between dust emissions, irrigation, and climate processes ...

Marcella, Marc Pace

2013-01-01T23:59:59.000Z

426

A tribological study of the interaction between surface micro texturing and viscoelastic lubricants  

E-Print Network (OSTI)

An experimental study is performed on micro textured surfaces using both elastic and Newtonian fluids in order to understand the effect of surface texturing and fluid rheology on sliding friction under lubricated conditions. ...

Hupp, Sara J. (Sara Jean), 1979-

2004-01-01T23:59:59.000Z

427

Spatial Variability of Soil Surface Properties and Consequences for the Annual and Monthly Water Balance of a Semiarid Environment (EFEDA Experiment)  

Science Conference Proceedings (OSTI)

During the second phase of the European International Project on Climatic and Hydrological Interactions between Vegetation, Atmosphere, and Land Surface (ECHIDA) Field Experiment in a Desertification Threatened Area (EFEDA) the spatial ...

Isabelle Braud; Randel Haverkamp; J. L. Arrúe; M. V. López

2003-02-01T23:59:59.000Z

428

Atomic data for controlled fusion research. Volume III. Particle interactions with surfaces  

DOE Green Energy (OSTI)

This report provides a handbook of data concerning particle solid interactions that are relevant to plasma-wall interactions in fusion devices. Published data have been collected, assessed, and represented by a single functional relationship which is presented in both tabular and graphical form. Mechanisms reviewed here include sputtering, secondary electron emission, particle reflection, and trapping.

Thomas, E.W.

1985-02-01T23:59:59.000Z

429

Spectroscopic investigations of small molecule interactions on metal oxide surfaces. Progress report, September 1, 1979-October 31, 1980  

DOE Green Energy (OSTI)

Significant advances were made over the past year in surveying with angle integrated uv photoelectron spectroscopy (UPS) the interactions of general classes of chemically important small molecules with metal oxide surfaces, and in elucidating in detail the geometric and electronic structures of the small molecule-surface complexes observed by angle resolved UPS. Progress can be divided into several areas: (1) a detailed understanding of the unique active site structures associated with the interaction of CO with ZnO utilizing angle integrated and angle resolved photoemission spectroscopy; (2) initiating survey studies into new small molecule systems with emphasis on hydrogen and ethylene; (3) successful construction and testing of a high resoltuion electron energy loss spectrometer (HREELS).

Solomon, E.I.; McFeeley, F.R.

1980-10-31T23:59:59.000Z

430

Influence of Land Cover Change on Regional Water Cycles in Eastern Siberia  

Science Conference Proceedings (OSTI)

This study evaluated the effect of recent eastern Siberian land surface changes, such as water surface expansion, on water-energy fluxes and precipitation and focused on land surface parameters using a three-dimensional atmospheric model [the ...

Ryuhei Yoshida; Masahiro Sawada; Takeshi Yamazaki; Takeshi Ohta; Tetsuya Hiyama

2013-02-01T23:59:59.000Z

431

An Evaluation of the Strength of Land–Atmosphere Coupling  

Science Conference Proceedings (OSTI)

Two ensembles of 1-month integrations of a coupled land–atmosphere climate model that differ only in their treatment of land surface boundary conditions have been generated from initial conditions chosen from the July states taken from each year ...

Paul A. Dirmeyer

2001-08-01T23:59:59.000Z

432

Interannual Variability of Land-Atmosphere Coupling Strength  

Science Conference Proceedings (OSTI)

Recent studies in the Global Land-Atmosphere Coupling Experiment (GLACE) established a framework to estimate the extent to which anomalies in the land surface state (e.g., soil moisture) can affect rainfall generation and other atmospheric ...

Zhichang Guo; Paul A. Dirmeyer

433

Climate Drift in a Coupled Land–Atmosphere Model  

Science Conference Proceedings (OSTI)

A coupled land–atmosphere climate model is examined for evidence of climate drift in the land surface state variable of soil moisture. The drift is characterized as pathological error growth in two different ways. First is the systematic error ...

Paul A. Dirmeyer

2001-02-01T23:59:59.000Z

434

An integrated approach to modelling land-use change on continental and global scales  

Science Conference Proceedings (OSTI)

Land-use and land-cover change are important drivers of global environmental change, affecting the state of biodiversity, the global carbon cycle, and other aspects of the earth system. In this article we describe the development of the land-use model ... Keywords: Continental and global scale land-use change modelling, Human-environment interaction, Land-use systems, Model framework

Rüdiger Schaldach; Joseph Alcamo; Jennifer Koch; Christina Kölking; David M. Lapola; Jan Schüngel; Jörg A. Priess

2011-08-01T23:59:59.000Z

435

Understanding Land–Sea Warming Contrast in Response to Increasing Greenhouse Gases. Part I: Transient Adjustment  

Science Conference Proceedings (OSTI)

Climate model simulations consistently show that surface temperature over land increases more rapidly than over sea in response to greenhouse gas forcing. The enhanced warming over land is not simply a transient effect caused by the land–sea ...

Buwen Dong; Jonathan M. Gregory; Rowan T. Sutton

2009-06-01T23:59:59.000Z

436

[Atomic beam studies of the interaction of hydrogen with transition metal surfaces  

DOE Green Energy (OSTI)

We have constructed two experimental facilities during the term of this grant. In the first three years we constructed a helium atom scattering (HAS) facility with both elastic (EHAS) and inelastic (IHAS) scattering measurement capabilities to investigate the structural and dynamical aspects of solid surfaces and thin films. A pioneering surface metastable atom magnetic diffraction (SMAMD) facility was constructed and developed over the past four years, which makes possible the investigation of long-range electron spin-ordering on the surfaces of insulating magnetic crystals. The following were studied: H overlayers and Ag, Cu on Pd(111), reconstructed Au(111), and NiO(100).

Not Available

1992-01-01T23:59:59.000Z

437

MODIS Land Products Subsets  

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

Shaaf, and the FLUXNET validation communities to choose sites and to identify the land products needed for validation. We also worked with MODAPS on subsetting the Land...

438

Africa Land Use (1980)  

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

Africa Land Use (1980) image Brown, S., and G. Gaston. 1996. Tropical Africa: Land Use, Biomass, and Carbon Estimates For 1980. ORNLCDIAC-92, NDP-055. Carbon Dioxide Information...

439

Land Validation web site  

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

web site A web site is now available for the Land Validation project. It was created with the purpose of facilitating communication among MODIS Land Validation Principal...

440

Global and Seasonal Assessment of Interactions between Climate and Vegetation Biophysical Processes: A GCM Study with Different Land–Vegetation Representations  

Science Conference Proceedings (OSTI)

A global and seasonal assessment of regions of the earth with strong climate–vegetation biophysical process (VBP) interactions is provided. The presence of VBP and degree of VBP effects on climate were assessed based on the skill of simulations ...

Yongkang Xue; Fernando De Sales; Ratko Vasic; C. Roberto Mechoso; Akio Arakawa; Stephen Prince

2010-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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

The Role of Sea Surface Temperatures in Interactions between ENSO and the North Pacific Oscillation  

Science Conference Proceedings (OSTI)

The North Pacific Oscillation (NPO) is a decadal to interdecadal fluctuation of sea surface temperatures (SSTs) in the North Pacific. Previous works have shown that during individual El Niño and La Niña winters, atmospheric circulation anomalies ...

David W. Pierce

2002-06-01T23:59:59.000Z

442

Assessing Surface–Atmosphere Interactions Using Former Soviet Union Standard Meteorological Network Data. Part I: Method  

Science Conference Proceedings (OSTI)

The turbulent heat fluxes at the soil surface are not observed (or poorly observed) by existing observational systems. This affects the ability to reliably predict the consequences of climate changes on the hydrologic cycle. Therefore, an ...

Pavel Ya Groisman; Eugene L. Genikhovich

1997-09-01T23:59:59.000Z

443

MODIS Land Products Subsets  

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

MODIS ASCII Subset Products - FTP Access MODIS ASCII Subset Products - FTP Access All of the MODIS ASCII Subsets are available from the ORNL DAAC's ftp site. The directory structure of the ftp site is based on the abbreviated names for the MODIS Products. Terra MODIS products are abbreviated "MOD", Aqua MODIS products are abbreviated "MYD" and combined Terra and Aqua MODIS products are abbreviated "MCD". The abbreviated names also include the version number (also known as collection). For specific products, please refer to the following table: Product Acronym Spatial Resolution Temporal Frequency Terra V005 SIN Aqua V005 SIN Terra/Aqua Combined V005 SIN Surface Reflectance SREF 500 m 8 day composites MOD09A1 MYD09A1 ---------- Land Surface Temperature and Emissivity TEMP 1 km 8 day composites MOD11A2 MYD11A2 ----------

444

Spectroscopic investigations of small-molecule interactions on metal oxide surfaces. Final report, September 1, 1978-December 31, 1981  

DOE Green Energy (OSTI)

Angle integrated and angle resolved ultraviolet photoelectron spectroscopy (UPS and ARPES) and high resolution electron energy loss spectroscopy (HREELS) have been performed on the low index single crystal surfaces of zinc oxide. Study of CO/ZnO shows that the mode of binding is dominated by 5sigma donation from the carbon end of the molecule to the unsaturated surface zinc ion with little ..pi.. backbonding to the CO2..pi..* orbital. This electronic structure is verified by a HREELS study. The geometry of CO binding is consistent with LEED studies where no symmetry changing reconstructions are observed to occur, and where the CO molecule forms an approximately linear Zn-C-O surface complex along the coordinatively unsaturated directions of the surface zinc ions. Implications of these studies to the mechanism of methanol synthesis is described. These UPS studies have also provided insight into the bonding interaction between small molecules such as NH/sub 3/ and CO/sub 2/ (as well as H/sub 2/O, C/sub 2/H/sub 4/, CH/sub 3/OH, H/sub 2/S and CH/sub 3/SH) and the ZnO single crystal surfaces.

Solomon, E. I.; McFeely, F. R.

1982-06-28T23:59:59.000Z

445

ZoomPointing revisited: supporting mixed-resolution gesturing on interactive surfaces  

Science Conference Proceedings (OSTI)

In this work, we explore the design of multi-resolution input on multi-touch devices. We devised a refined zooming technique named Offset, where the target is set at a location offset from the non-dominant hand while the dominant hand controls the direction ... Keywords: mixed-resolution gesturing, offset, tablet interaction

Matei Negulescu; Jaime Ruiz; Edward Lank

2011-11-01T23:59:59.000Z

446

Global Vegetation Root Distribution for Land Modeling  

Science Conference Proceedings (OSTI)

Vegetation root distribution is one of the factors that determine the overall water holding capacity of the land surface and the relative rates of water extraction from different soil layers for vegetation transpiration. Despite its importance, ...

Xubin Zeng

2001-10-01T23:59:59.000Z

447

Use of a Coupled Land Surface General Circulation Model to Examine the Impacts of Doubled Stomatal Resistance on the Water Resources of the American Southwest  

Science Conference Proceedings (OSTI)

Tiny openings on the surfaces of leaves, stomata, control the flux of CO2, water vapor, and other gases between the atmosphere and the earth’s vegetated surface. An increase in atmospheric CO2 could have an effect on stomatal openings, causing ...

Marian Martin; Robert E. Dickinson; Zong-Liang Yang

1999-12-01T23:59:59.000Z

448

Optimized synthesis of aminooxy-peptides as glycoprobe precursors for surface-based sugarprotein interaction studies  

E-Print Network (OSTI)

17 (2007) 5155­5158 #12;chemical ligation.19,20 Moreover, applications to sugar­ peptide conjugation is flown across and the resulting read-out enables both quantitation and kinetic analysis advantages9,10 but requires a sugar in highly purified form and attached to the chip surface in a chemically

Pompeu Fabra, Universitat

449

Interaction of H2S with alpha-Fe2O3(0001) Surface  

SciTech Connect

The atomic-scale structural changes in an {alpha}-Fe2O3 (hematite) (0 0 0 1) surface induced by sulfidation and subsequent oxidation processes were studied by X-ray photoemission spectroscopy, LEED, and X-ray standing wave (XSW) measurements. Annealing the {alpha}-Fe2O3(0 0 0 1) with a H2S partial pressure of 1 x 10-7 Torr produced iron sulfides on the surface as the sulfur atoms reacted with the substrate Fe ions. The oxidation state of the substrate Fe changed from 3+ to 2+ as a result of the sulfidation. The XSW measured distance of the sulfur atomic-layer from the unrelaxed substrate oxygen layer was 3.16 Angstroms. The sulfide phase consisted of three surface domains identified by LEED. Formation of the two-dimensional FeS2 phase with structural parameters consistent with an outermost layer of (1 1 1) pyrite has been proposed. Atomic oxygen exposure oxidized the surface sulfide to a sulfate (SO{sup 2-}{sub 4}) and regenerated the {alpha}-Fe2O3(0 0 0 1) substrate, which was indicated by a (1 x 1) LEED pattern and the re-oxidization of Fe to 3+.

Kim,C.; Escuadro, A.; Bedzyk, M.

2007-01-01T23:59:59.000Z

450

Coupling the ISBA Land Surface Model and the TOPMODEL Hydrological Model for Mediterranean Flash-Flood Forecasting: Description, Calibration, and Validation  

Science Conference Proceedings (OSTI)

Innovative coupling between the soil–vegetation–atmosphere transfer (SVAT) model Interactions between Soil, Biosphere, and Atmosphere (ISBA) and the hydrological model TOPMODEL has been specifically designed for flash-flood forecasting in the ...

Ludovic Bouilloud; Katia Chancibault; Béatrice Vincendon; Véronique Ducrocq; Florence Habets; Georges-Marie Saulnier; Sandrine Anquetin; Eric Martin; Joel Noilhan

2010-04-01T23:59:59.000Z

451

LBA Land Use and Land Cover Change Data Sets Released  

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

four data sets from the Carbon four data sets from the Carbon Dynamics and Nutrient Dynamics science themes, components of the LBA-ECO Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). LBA-ECO CD-36 South American Land Data Assimilation System Atmospheric Forcing Data . Data set prepared by L.G.G. de Goncalves, W.J. Shuttleworth, D. Vila, E. Larroza, M.J. Bottino, D.L. Herdies, J.A. Aravequia, J.G. de Mattos, D.L. Toll, M. Rodell and P. Houser. This data set provides South American Land Data Assimilation System (SALDAS) atmospheric forcing data necessary for land surface modeling for South America. The data were derived by combining modeled and observation based sources.The forcing data cover the entire continent of South America at 0.125 degree resolution and are built around the model-calculated values of

452

Interaction and reactivity of nitric oxide and carbon monoxide on ruthenium surfaces  

DOE Green Energy (OSTI)

A multifaceted investigation of the reduction of nitric oxide by carbon monoxide using a ruthenium (102) single crystal catalyst in the pressure range 10/sup -3/ to 10 Torr and temperature range of 300 to 475/sup 0/C has been undertaken. Kinetic and isotopic results indicate that the reaction products CO/sub 2/ and N/sub 2/ were produced via two reaction mechanisms. Using a reducing gas mixture (low P/sub NO//P/sub CO/ ratio) a two site mechanism was operative involving NO dissociation. The carbon monoxide kinetic order varied from +1 to -3 and the nitric oxide order varied from +1 to 0. The catalyst under these conditions was determined to be metallic ruthenium with oxygen bonded within the first surface layer. The oxygen was unreactive and formed a (1 x 3)-0 LEED pattern. Under oxidizing conditions (high P/sub NO//P/sub CO/ ratio) the catalyst was ruthenium dioxide and the functional mechanism under these reaction conditions yielded a nitric oxide order of +2 to -4. Inclusion of a site poisoning mechanism under reducing conditions and an RuO/sub 2/ growth mechanism involving ruthenium cation transfer under oxidizing conditions into the kinetic rate laws led to an overall rate law which could be fit to the carbon monoxide and nitric oxide order plots. Using isotopically oxygen labelled reactants, it was observed that the three possible isotopes of carbon dioxide were produced. A ..gamma..-CO surface species is postulated as an intermediate in the exchange process. The reaction was observed to be initially surface structure insensitive and the reaction kinetics were derived using a Langmuir-Hinshelwood formalism.

Quick, E.E.

1980-03-01T23:59:59.000Z

453

land | OpenEI  

Open Energy Info (EERE)

land land Dataset Summary Description This dataset is part of a larger internal dataset at the National Renewable Energy Laboratory (NREL) that explores various characteristics of large solar electric (both PV and CSP) facilities around the United States. This dataset focuses on the land use characteristics for solar facilities that are either under construction or currently in operation. Source Land-Use Requirements for Solar Power Plants in the United States Date Released June 25th, 2013 (5 months ago) Date Updated Unknown Keywords acres area average concentrating solar power csp Density electric hectares km2 land land requirements land use land-use mean photovoltaic photovoltaics PV solar statistics Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon Master Solar Land Use Spreadsheet (xlsx, 1.5 MiB)

454

MODIS Land Product Subsets  

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

Validation > MODIS Land Subsets Validation > MODIS Land Subsets MODIS Land Product Subsets Overview Earth, Western Hemisphere The goal of the MODIS Land Product Subsets project is to provide summaries of selected MODIS Land Products for the community to use for validation of models and remote-sensing products and to characterize field sites. Output files contain pixel values of MODIS land products in text format and in GeoTIFF format. In addition, data visualizations (time series plots and grids showing single composite periods) are available. MODIS Land Product Subsets Resources The following MODIS Land Product Subsets resources are maintained by the ORNL DAAC: MODIS Land Products Offered Background Citation Policy Methods and formats MODIS Sinusoidal Grid - Google Earth KMZ Classroom Exercises

455

1948–98 U.S. Hydrological Reanalysis by the Noah Land Data Assimilation System  

Science Conference Proceedings (OSTI)

Land surface variables, such as soil moisture, are among the most important components of memory for the climate system. A more accurate and long time series of land surface data is very important for real-time drought monitoring, for ...

Y. Fan; H. M. Van den Dool; D. Lohmann; K. Mitchell

2006-04-01T23:59:59.000Z

456

Codeposition on hot CVD surfaces: Particle dynamics and deposit roughness interactions  

SciTech Connect

To capture in a tractable manner essential coupling effects in CVD systems when particles generated in thermal boundary layers also deposit, a film theory was developed that predicts simultaneous vapor and particle deposition rates at a hot deposition surface. The codeposition rate prediction method also calculates for the first time the corresponding solid deposit roughness using recently published results of particle-level simulations. For the numerical illustrations, the growth of TiO{sub 2}(s) films by the codeposition of titanium tetra-isopropoxide vapor and film-nucleated/grown TiO{sub 2} particles (generated in the thermal boundary layer) was considered. Experimental rate data for this system are available. The continuum and particle-level simulation methods provide: the interplay of vapor precursor kinetics, particle nucleation, growth, coagulation and diffusion in determining the complex ``structure`` of such multiphase chemically reacting boundary layers; wall deposition rates of both surviving vapors and film-nucleated particles; and the ``self-consistent`` microstructure (surface roughness) of the resulting solid deposit. Timely and tractable generalizations are discussed in the light of recent results for the transport properties and stability of ``fractal-like`` aggregated particles.

Tandon, P.; Rosner, D.E. [Yale Univ., New Haven, CT (United States)

1996-06-01T23:59:59.000Z

457

Wind and Temperature Structure over a Land-Water-Land Area  

Science Conference Proceedings (OSTI)

Wind and temperature data obtained on 5 June 1984 during the Øresund experiment are analyzed. The day was characterized by moderately strong winds blowing from a heated land area over a colder water surface and then over a second heated land ...

J. C. Doran; Sven-Erik Gryning

1987-08-01T23:59:59.000Z

458

Transition of the Large-Scale Atmospheric and Land Surface Conditions from the Dry to the Wet Season over Amazonia as Diagnosed by the ECMWF Re-Analysis  

Science Conference Proceedings (OSTI)

Using 15-yr instantaneous European Centre for Medium-Range Weather Forecasts Re-Analysis (ERA) data, the authors have examined the large-scale atmospheric conditions and the local surface fluxes through the transition periods from the dry to wet ...

Wenhong Li; Rong Fu

2004-07-01T23:59:59.000Z

459

Land animal sizes  

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

Land animal sizes Name: tamar c Status: NA Age: NA Location: NA Country: NA Date: Around 1993 Question: Why are today's land mammals so much smaller than prehistoric mammals?...

460

The Common Land Model  

Science Conference Proceedings (OSTI)

The Common Land Model (CLM) was developed for community use by a grassroots collaboration of scientists who have an interest in making a general land model available for public use and further development. The major model characteristics include ...

Yongjiu Dai; Xubin Zeng; Robert E. Dickinson; Ian Baker; Gordon B. Bonan; Michael G. Bosilovich; A. Scott Denning; Paul A. Dirmeyer; Paul R. Houser; Guoyue Niu; Keith W. Oleson; C. Adam Schlosser; Zong-Liang Yang

2003-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "land surface interaction" 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.


461

School Land Board (Texas)  

Energy.gov (U.S. Department of Energy (DOE))

The School Land Board oversees the use of land owned by the state or held in trust for use and benefit by the state or one of its departments, boards, or agencies. The Board is responsible for...

462

Land–Ocean Warming Contrast over a Wide Range of Climates: Convective Quasi-Equilibrium Theory and Idealized Simulations  

Science Conference Proceedings (OSTI)

Surface temperatures increase at a greater rate over land than ocean in simulations and observations of global warming. It has previously been proposed that this land–ocean warming contrast is related to different changes in lapse rates over land ...

Michael P. Byrne; Paul A. O’Gorman

2013-06-01T23:59:59.000Z

463

Estimation of Surface Turbulent Fluxes through Assimilation of Radiometric Surface Temperature Sequences  

Science Conference Proceedings (OSTI)

A model of land surface energy balance is used as a constraint on the estimation of factors characterizing land surface influences on evaporation and turbulent heat transfer from sequences of radiometric surface temperature measurements. The ...

Francesca Caparrini; Fabio Castelli; Dara Entekhabi

2004-02-01T23:59:59.000Z

464

LBA Land Use and Land Cover Data Set Released  

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

Land Use and Land Cover Data Set Released The ORNL DAAC announces the release of an image data set from the Land Use and Land Cover science theme, a component of the LBA-ECO Large...

465

How Much Do Different Land Models Matter for Climate Simulation? Part II: A Decomposed View of the Land–Atmosphere Coupling Strength  

Science Conference Proceedings (OSTI)

The Global Land–Atmosphere Coupling Experiment (GLACE) built a framework to estimate the strength of the land–atmosphere interaction across many weather and climate models. Within this framework, GLACE-type experiments are performed with a single ...

Jiangfeng Wei; Paul A. Dirmeyer; Zhichang Guo

2010-06-01T23:59:59.000Z

466

Evaluation of land-surface interaction in ECMWF and NCEP/NCAR reanalysis models over grassland (FIFE) and boreal forest (BOREAS)  

E-Print Network (OSTI)

site in 1996 near Thompson, Manitoba. Some aspects of the98.484øW near Thompson, Manitoba. Some aspects of the40 l•n west of Thompson, Manitoba (designated TF-3 for tower

1998-01-01T23:59:59.000Z

467

Research priorities in land use and land-cover change for the Earth system and integrated assessment modelling  

SciTech Connect

This special issue has highlighted recent and innovative methods and results that integrate observations and AQ3 modelling analyses of regional to global aspect of biophysical and biogeochemical interactions of land-cover change with the climate system. Both the Earth System and the Integrated Assessment modeling communities recognize the importance of an accurate representation of land use and land-cover change to understand and quantify the interactions and feedbacks with the climate and socio-economic systems, respectively. To date, cooperation between these communities has been limited. Based on common interests, this work discusses research priorities in representing land use and land-cover change for improved collaboration across modelling, observing and measurement communities. Major research topics in land use and land-cover change are those that help us better understand (1) the interaction of land use and land cover with the climate system (e.g. carbon cycle feedbacks), (2) the provision of goods and ecosystem services by terrestrial (natural and anthropogenic) land-cover types (e.g. food production), (3) land use and management decisions and (4) opportunities and limitations for managing climate change (for both mitigation and adaptation strategies).

Hibbard, Kathleen A.; Janetos, Anthony C.; Van Vuuren, Detlef; Pongratz, Julia; Rose, Steven K.; Betts, Richard; Herold, Martin; Feddema, Johannes J.

2010-11-15T23:59:59.000Z

468

EOS Land Validation Presentations  

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

EOS Land Validation Presentations EOS Land Validation Presentations Meeting: Land Cover Validation Workshop Date: February 2, 2004 Place: Boston, MA Title: Validation Data Support Activities at the ORNL DAAC (Power Point) Presenter: Bob Cook Meeting: Fall 2003 American Geophysical Union (AGU) Meeting Date: December 9, 2003 Place: San Francisco, CA Title: Ground-Based Data Supporting the Validation of MODIS Land Products (Power Point) Presenter: Larry Voorhees Meeting: Terra and Aqua Products Review Date: March 2003 Place: NASA HQ Title: Supporting the Validation of MODIS Land Products (Power Point) Presenter: Larry Voorhees Meeting: Terra and Aqua Products Review Date: March 2003 Place: NASA HQ Title: MODIS Land Summary (Power Point) Presenter: Chris Justice, University of Maryland Meeting: Spring 2002 American Geophysical Union (AGU) Meeting

469

A technical modeler's interface for urbansim, a system for integrated land use, transportation, and environmental modeling  

Science Conference Proceedings (OSTI)

Patterns of land use and available transportation systems play a critical role in determining the economic vitality, livability, and sustainability of urban areas. Transportation interacts strongly with land use. For example, automobile-oriented development ...

Alan Borning; Paul Waddell

2004-05-01T23:59:59.000Z

470

MODIS Land Products Subsets  

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

ORNL DAAC MODIS Land Product Subsets MODIS Collection 5 Global Subsetting and Visualization Tool Create subset for user selected site, area, product, and time period. Data for...

471

MODIS Land Products Subsets  

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

Citation When using subsets of MODIS Land Products from the ORNL DAAC, please use the citation: Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC). 2011....

472

National Land Cover Data  

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

products was done by the Multi-Resolution Land Characterization Consortium and EROS Data Center (U.S. Geological Survey). The Consortium includes the Environmental Monitoring and...

473

Sugar Land, TX -  

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

Petroleum Engineering Alumnus Recognized by Secretary of Energy for Work at National Lab Sugar Land, TX - The National Energy Technology Laboratory is proud to announce that...

474

Hierarchical Marginal Land Assessment for Land Use Planning  

SciTech Connect

Marginal land provides an alternative potential for food and bioenergy production in the face of limited land resources; however, effective assessment of marginal lands is not well addressed. Concerns over environmental risks, ecosystem services and sustainability for marginal land have been widely raised. The objective of this study was to develop a hierarchical marginal land assessment framework for land use planning and management. We first identified major land functions linking production, environment, ecosystem services and economics, and then classified land resources into four categories of marginal land using suitability and limitations associated with major management goals, including physically marginal land, biologically marginal land, environmental-ecological marginal land, and economically marginal land. We tested this assessment framework in south-western Michigan, USA. Our results indicated that this marginal land assessment framework can be potentially feasible on land use planning for food and bioenergy production, and balancing multiple goals of land use management. We also compared our results with marginal land assessment from the Conservation Reserve Program (CRP) and land capability classes (LCC) that are used in the US. The hierarchical assessment framework has advantages of quantitatively reflecting land functions and multiple concerns. This provides a foundation upon which focused studies can be identified in order to improve the assessment framework by quantifying high-resolution land functions associated with environment and ecosystem services as well as their criteria are needed to improve the assessment framework.

Kang, Shujiang [ORNL; Post, Wilfred M [ORNL; Wang, Dali [ORNL; Nichols, Dr Jeff A [ORNL; Bandaru, Vara Prasad [ORNL

2013-01-01T23:59:59.000Z

475

Corrective measures technology for shallow land burial at arid sites: field studies of biointrusion barriers and erosion control  

Science Conference Proceedings (OSTI)

The field research program involving corrective measures technologies for arid shallow land burial (SLB) sites is described. Results of field testing of a biointrusion barrier installed at a close-out waste disposal site (Area B) at Los Alamos are presented. Soil erosion and infiltration of water into a simulated trench cap with various surface treatments were measured, and the interaction between erosion control and subsurface water dynamics is discussed relative to waste management.

Nyhan, J.W.; Hakonson, T.E.; Lopez, E.A.

1986-03-01T23:59:59.000Z

476

Proceedings of US/Japan workshop, Q219 on high heat flux components and plasma surface interactions for next fusion devices  

Science Conference Proceedings (OSTI)

This report contains the viewgraphs from the proceedings of US/Japan Workshop on High Heat Flux Components and Plasma Surface Interactions for Next Fusion Devices. Some of the general topics covered by this report are: PFC/PSI in tokamak and helical devices; development of high heat flux components; PSIS and plasma facing materials;tritium; and material damage.

Ulrickson, M.A.; Stevens, P.L.; Hino, T.; Hirohata, Y. [eds.] [eds.

1996-12-01T23:59:59.000Z

477

csp land use | OpenEI Community  

Open Energy Info (EERE)

csp land use Home Sfomail's picture Submitted by Sfomail(48) Member 25 June, 2013 - 12:10 Solar Land Use Data on OpenEI acres csp land use how much land land requirements pv land...

478

how much land | OpenEI Community  

Open Energy Info (EERE)

by Sfomail(48) Member 25 June, 2013 - 12:10 Solar Land Use Data on OpenEI acres csp land use how much land land requirements pv land use solar land use square miles I'm...

479

land requirements | OpenEI Community  

Open Energy Info (EERE)

by Sfomail(48) Member 25 June, 2013 - 12:10 Solar Land Use Data on OpenEI acres csp land use how much land land requirements pv land use solar land use square miles I'm...

480

ARM - Evaluation Product - Critical soil quantities for describing land  

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

ProductsCritical soil quantities for describing land ProductsCritical soil quantities for describing land properties Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Critical soil quantities for describing land properties 1994.01.01 - 2012.12.31 Site(s) SGP General Description The ARMBELAND is a subset of the ARM Best Estimate (ARMBE) products for supporting community land-atmospheric research and land model developments. It contains several critical soil quantities that ARM has been measuring for many years for describing land properties. The quantities in ARMBE-Land are averaged over one hour time interval, consistent with other ARMBE datasets. It is recommended to use with other ARMBE data products such as ARMBECLDRAD (cloud and radiative fluxes) and ARMBEATM (surface

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481

Water, Land and People  

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

Water, Land and People Water, Land and People Nature Bulletin No. 251 January 8, 1983 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation WATER, LAND AND PEOPLE "Water, Land and People" is the title of a book which, like "Road to Survival", should be read by every American. Water, and its uses or control, has become a vital national problem. Some places, some years, we have too much of it and suffer disastrous floods. Elsewhere we have too little. In cities like New York and Los Angeles -- even in many inland towns -- and in the western lands which depend upon irrigation, the demand far exceeds the supply. Our Congress is beseeched for huge appropriations to provide flood control, navigation, electric power and irrigation.

482

Interactions between self-assembled monolayers and an organophosphonate: A detailed study using surface acoustic wave-based mass analysis, polarization modulation-FTIR spectroscopy, and ellipsometry  

SciTech Connect

Self-assembled monolayers (SAMs) having surfaces terminated in the following functional groups: -CH{sub 3}, -OH, -COOH, and (COO{sup -}){sub 2}Cu{sup 2+} (MUA-Cu{sup 2+}) have been prepared and examined as potential chemically sensitive interfaces. Mass measurements made using surface acoustic wave (SAW) devices indicate that these surfaces display different degrees of selectivity and sensitivity to a range of analytes. The response of the MUA-Cu{sup 2+} SAM to the nerve-agent simulant diisopropyl methylphosphonate (DIMP) is particularly intriguing. Exposure of this surface to 50%-of-saturation DIMP yields a surface concentration equivalent to about 20 DIMP monolayers. Such a high surface concentration in equilibrium with a much lower-than-saturation vapor pressure has not previously been observed. Newly developed analytical tools have made it possible to measure the infrared spectrum of the chemically receptive surface during analyte dosing. Coupled with in-situ SAW/ellipsometry measurements, which permit simultaneous measurement of mass and thickness with nanogram and Angstrom resolution, respectively, it has been possibly to develop a model for the surface chemistry leading to the unusual behavior of this system. The results indicate that DIMP interacts strongly with surface-confined Cu{sup 2+} adduct that nucleates growth of semi-ordered crystallites having substantially lower vapor pressure than the liquid.

Crooks, R.M.; Yang, H.C.; McEllistrem, L.J. [Texas A& M Univ., College Station, TX (United States). Dept of Chemistry] [and others

1997-06-24T23:59:59.000Z

483

Flux Replacement as a Method to Diagnose Coupled Land–Atmosphere Model Feedback  

Science Conference Proceedings (OSTI)

The potential role of the land surface state in improving predictions of seasonal climate is investigated with a coupled land–atmosphere climate model. Climate simulations for 18 boreal-summer seasons (1982–99) have been conducted with specified ...

Paul A. Dirmeyer; Mei Zhao

2004-12-01T23:59:59.000Z

484

A Land Data Assimilation System for Soil Moisture and Temperature: An Information Content Study  

Science Conference Proceedings (OSTI)

A Canadian Land Data Assimilation System (CaLDAS) for the analysis of land surface prognostic variables is designed and implemented at the Meteorological Service of Canada for the initialization of numerical weather prediction and climate models. ...

G. Balsamo; J-F. Mahfouf; S. Bélair; G. Deblonde

2007-12-01T23:59:59.000Z

485

Global Population Distribution and Urban Land Use in Geophysical Parameter Space  

Science Conference Proceedings (OSTI)

The spatial distribution of human population on the land surface is a fundamental determinant of land-use impacts on Earth's ecosystems. Census enumerations and satellite-detected night lights provide two complementary, but distinct, ...

Christopher Small

2004-06-01T23:59:59.000Z

486

The Role of an Advanced Land Model in Seasonal Dynamical Downscaling for Crop Model Application  

Science Conference Proceedings (OSTI)

An advanced land model [the National Center for Atmospheric Research (NCAR) Community Land Model, version 2 (CLM2)] is coupled to the Florida State University (FSU) regional spectral model to improve seasonal surface climate outlooks at very high ...

D. W. Shin; J. G. Bellow; T. E. LaRow; S. Cocke; James J. O'Brien

2006-05-01T23:59:59.000Z

487

A Global Intercomparison of Modeled and Observed Land–Atmosphere Coupling  

Science Conference Proceedings (OSTI)

Land–atmosphere coupling strength or the degree to which land surface anomalies influence boundary layer development—and in extreme cases, rainfall—is arguably the single most fundamental criterion for evaluating hydrological model performance. ...

Craig R. Ferguson; Eric F. Wood; Raghuveer K. Vinukollu

2012-06-01T23:59:59.000Z

488

Land-Use and Ecosystems  

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

Land-Use and Ecosystems Terrestrial Carbon Management Data Sets and Analyses National Land Cover Data 1992 (2005), and 2001 (2008) Carbon Flux to the Atmosphere from Land-Use...

489

Reproducibility of Seasonal Land Surface Climate  

Science Conference Proceedings (OSTI)

In this study, the sensitivity of the continental seasonal climate to initial conditions is estimated from an ensemble of decadal simulations of an atmospheric general circulation model with the same specifications of radiative forcings and ...

Thomas J. Phillips

2006-02-01T23:59:59.000Z

490

Carbon Sequestration on Surface Mine Lands  

SciTech Connect

A major effort this quarter was to inventory all the planted areas to evaluate the diameter and height growth as well as determine survival rates. Soil bulk density and compaction continue to be evaluated on all the areas to determine the effects on tree growth and survival. The hydrologic quantity and quality are continuously monitored and quantified. Much effort was also expended in preparing technical presentations for professional meeting and field trips for a variety of audiences.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2005-12-07T23:59:59.000Z

491

CARBON SEQUESTRATION ON SURFACE MINE LANDS  

Science Conference Proceedings (OSTI)

A monitoring program to measure treatment effects on above ground, and below ground carbon and nitrogen pools for the planting areas is being conducted. The collection of soil and tissue samples from both the 2003 and 2004 plantings is complete and are currently being processed in the laboratory. Detailed studies have been initiated to address specific questions pertaining to carbon cycling. Examinations of decomposition and heterotropic respiration on carbon cycling in the reforestation plots were continued during this reporting period. A whole-tree harvesting method was employed to evaluate carbon accumulation as a function of time on the mined site. The trees were extracted from the sites and separated into the following components: foliage, stems, branches, and roots.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2004-11-30T23:59:59.000Z

492

CARBON SEQUESTRATION ON SURFACE MINE LANDS  

DOE Green Energy (OSTI)

The October-December Quarter was dedicated to analyzing the first two years tree planting activities and evaluation of the results. This included the analyses of the species success at each of the sites and quantifying the data for future year determination of research levels. Additional detailed studies have been planned to further quantify total carbon storage accumulation on the research areas. At least 124 acres of new plantings will be established in 2005 to bring the total to 500 acres or more in the study area across the state of Kentucky. During the first 2 years of activities, 172,000 tree seedlings were planted on 257 acres in eastern Kentucky and 77,520 seedlings were planted on 119 acres in western Kentucky. The quantities of each species was discussed in the first Annual Report. A monitoring program was implemented to measure treatment effects on above and below ground C and nitrogen (N) pools and fluxes. A sampling strategy was devised that will allow for statistical comparisons of the various species within planting conditions and sites. Seedling heights and diameters are measured for initial status and re-measured on an annual basis. Leaves were harvested and leaf area measurements were performed. They were then dried and weighed and analyzed for C and N. Whole trees were removed to determine biomass levels and to evaluate C and N levels in all components of the trees. Clip plots were taken to determine herbaceous production and litter was collected in baskets and gathered each month to quantify C & N levels. Soil samples were collected to determine the chemical and mineralogical characterization of each area. The physical attributes of the soils are also being determined to provide information on the relative level of compaction. Hydrology and water quality monitoring is being conducted on all areas. Weather data is also being recorded that measures precipitation values, temperature, relative humidity wind speed and direction and solar radiation. Detailed studies to address specific questions pertaining to carbon flux are continuing.

Donald H. Graves; Christopher Barton; Richard Sweigard; Richard Warner

2005-02-25T23:59:59.000Z

493

Carbon Sequestration on Surface Mine Lands  

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

Graves 1 , J.M. Ringe 1 , J.W. Stringer 1 and J.A 2 . Thompson 1 Department of Forestry, University of Kentucky, Lexington, KY 40546, 2 Department of Soil Science, North Carolina...

494

Crop Wind Energy Experiment (CWEX): Observations of Surface-Layer, Boundary Layer, and Mesoscale Interactions with a Wind Farm  

Science Conference Proceedings (OSTI)

Perturbations of mean and turbulent wind characteristics by large wind turbines modify fluxes between the vegetated surface and the lower boundary layer. While simulations have suggested that wind farms could significantly change surface fluxes of heat, ...

Daniel A. Rajewski; Eugene S. Takle; Julie K. Lundquist; Steven Oncley; John H. Prueger; Thomas W. Horst; Michael E. Rhodes; Richard Pfeiffer; Jerry L. Hatfield; Kristopher K. Spoth; Russell K. Doorenbos

2013-05-01T23:59:59.000Z

495

A New Method for Exploring Coupled Land–Atmosphere Dynamics  

Science Conference Proceedings (OSTI)

This paper proposes a new method for investigating coupled land–atmosphere interactions. The method is to apply an empirical correction technique to distinct components of a model and then examine differences between forecasts of the empirically ...

Timothy DelSole; Mei Zhao; Paul Dirmeyer

2009-08-01T23:59:59.000Z

496

Spatial and Temporal Correlation among Oklahoma Mesonet and OASIS Surface-Layer Measurements  

Science Conference Proceedings (OSTI)

A major challenge in meteorology is determining the manner and scale at which the land surface interacts with the atmosphere. A majority of field programs, designed to address this issue, have been limited in space and time and thus have been ...

Jerald A. Brotzge; Scott J. Richardson

2003-01-01T23:59:59.000Z

497

land.PDF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2 2 AUDIT REPORT SALE OF LAND AT OAK RIDGE U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT SERVICES May 2001 DEPARTMENT OF ENERGY Washington, DC 20585 May 7, 2001 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman (Signed) Inspector General SUBJECT: INFORMATION: Audit Report on the "Sale of Land at Oak Ridge" BACKGROUND Under the Atomic Energy Act of 1954, the U.S. Department of Energy (Department) may sell land in the performance of identified programmatic functions. The functions specified in the Atomic Energy Act include encouraging scientific and industrial progress, controlling special nuclear

498

NASA Land Validation Campaign Data  

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

Products > Validation NASA Land Validation Campaign Data Land Validation Campaigns The goal of the EOS Validation Program is the comprehensive assessment of all EOS science data...

499

Sugar Land, TX -  

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

Alumnus Recognized by Secretary of Energy for Work at National Lab Sugar Land, TX - The National Energy Technology Laboratory is proud to announce that U.S. Air Force Academy...

500

MODIS Land Products Subsets  

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

(Meter) MCD12Q1 LC MODISTerra+Aqua Lan Cover ( LC ) Type Yearly L3 Global 500m SIN Grid annual 500 MCD12Q2 LCD MODISTerra+Aqua Land Cover Dynamics ( LCD ) Yearly L3 Global...