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Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" from the National Library of EnergyBeta (NLEBeta).
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1

The Atmospheric Mesoscale Dispersion Modeling System  

Science Conference Proceedings (OSTI)

The mesoscale dispersion modeling system (MDMS) described herein is under development as a simulation tool to investigate atmospheric flow and pollution dispersion over complex terrain for domains up to several hundred kilometers. The system ...

Marek Uliasz

1993-01-01T23:59:59.000Z

2

Mesoscale Modeling of Boundary Layer Refractivity and Atmospheric Ducting  

Science Conference Proceedings (OSTI)

In this study four mesoscale forecasting systems were used to investigate the four-dimensional structure of atmospheric refractivity and ducting layers that occur within evolving synoptic conditions over the eastern seaboard of the United States. ...

Tracy Haack; Changgui Wang; Sally Garrett; Anna Glazer; Jocelyn Mailhot; Robert Marshall

2010-12-01T23:59:59.000Z

3

Evaluation of a Mesoscale Atmospheric Dispersion Modeling System with Observations from the 1980 Great Plains Mesoscale Tracer Field Experiment. Part I: Datasets and Meteorological Simulations  

Science Conference Proceedings (OSTI)

The Colorado State University mesoscale atmospheric dispersion (MAD) numerical modeling system, which consists of a prognostic mesoscale meteorological model coupled to a mesoscale Lagrangian particle dispersion model, has been used to simulate ...

Michael D. Moran; Roger A. Pielke

1996-03-01T23:59:59.000Z

4

Mesoscale Waves as a Probe of Jupiter's Deep Atmosphere  

Science Conference Proceedings (OSTI)

Search of the Voyager images of Jupiter reveals a class of mesoscale waves occurring near the extrema of the zonal velocity profile between latitudes 30°S and 30°N. The average horizontal wavelength is 300 km, compared to an atmospheric scale ...

F. M. Flasar; P. J. Gierasch

1986-11-01T23:59:59.000Z

5

Relevance of the Mesoscale Entrainment Instability to the Marine Cloud-topped Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

Mesoscale variability in entrainment across the inversion capping the cloud-topped atmospheric boundary layer (CTBL) has been proposed as an explanation for mesoscale variability in cloud thickness. The relevance of this mechanism, called ...

Hugh A. Rand; Christopher S. Bretherton

1993-04-01T23:59:59.000Z

6

Mesoscale Coupled Ocean-Atmosphere Interaction  

E-Print Network (OSTI)

small-scale features in ocean winds. Science, 303, Chelton,of the regional coupled ocean-atmosphere model RCAO. Borealstress dependence on ocean surface velocity: implications

Seo, Hyodae

2007-01-01T23:59:59.000Z

7

Mesoscale coupled ocean-atmosphere interaction  

E-Print Network (OSTI)

small-scale features in ocean winds. Science, 303, Chelton,of the regional coupled ocean-atmosphere model RCAO. Borealstress dependence on ocean surface velocity: implications

Seo, Hyodae

2007-01-01T23:59:59.000Z

8

Enhancement of Tropical Ocean Evaporation and Sensible Heat Flux by Atmospheric Mesoscale Systems  

Science Conference Proceedings (OSTI)

The enhancement of monthly averaged evaporation by atmospheric mesoscale systems is estimated from long-term hourly observations of surface meteorological data from the Tropical Ocean Global Atmosphere (TOGA) Tropical Atmosphere Ocean (TAO) buoy ...

Steven K. Esbensen; Michael J. McPhaden

1996-10-01T23:59:59.000Z

9

An Investigation of Terrain Effects on the Mesoscale Spectrum of Atmospheric Motions  

Science Conference Proceedings (OSTI)

Wind and temperature data collected on commercial aircraft during the Global Atmospheric Sampling Program (GASP) are used to investigate the effects of underlying terrain on mesoscale variability, and the observational results are interpreted ...

G. D. Nastrom; D. C. Fritts; K. S. Gage

1987-10-01T23:59:59.000Z

10

A Coupled Air–Sea Mesoscale Model: Experiments in Atmospheric Sensitivity to Marine Roughness  

Science Conference Proceedings (OSTI)

A coupled air–sea numerical model comprising a mesoscale atmospheric model, a marine circulation model, and a surface wave model is presented. The coupled model is tested through simulations of an event of frontal passage through the Lake Erie ...

Jordan G. Powers; Mark T. Stoelinga

2000-01-01T23:59:59.000Z

11

Effects of Initial and Boundary Conditions of Mesoscale Models on Simulated Atmospheric Refractivity  

Science Conference Proceedings (OSTI)

Radar ducting is caused by sharp vertical changes in temperature and, especially, water vapor at the top of the atmospheric boundary layer, both of which are sensitive to variations in the underlying surface conditions, local mesoscale weather, ...

Changgui Wang; Damian Wilson; Tracy Haack; Peter Clark; Humphrey Lean; Robert Marshall

2012-01-01T23:59:59.000Z

12

Mesoscale Spectra of Mars’s Atmosphere Derived from MGS TES Infrared Radiances  

Science Conference Proceedings (OSTI)

Wavenumber spectra of the atmospheric potential energy of Mars at mesoscales (wavelengths of 64–957 km) were obtained as a function of latitude, season, and Martian year using infrared radiance data obtained by the Thermal Emission Spectrometer (...

Takeshi Imamura; Yasuhiro Kawasaki; Tetsuya Fukuhara

2007-05-01T23:59:59.000Z

13

Statistical Performance of Several Mesoscale Atmospheric Dispersion Models  

Science Conference Proceedings (OSTI)

Seventeen mesoscale dispersion models were statistically evaluated with data from krypton-85 emissions from the Savannah River Plant, Aiken, SC. Widely accepted statistical parameters were used for the statistical evaluation. The models were able ...

A. H. Weber; M. R. Buckner; J. H. Weber

1982-11-01T23:59:59.000Z

14

Stratified Turbulence and the Mesoscale Variability of the Atmosphere  

Science Conference Proceedings (OSTI)

An analysis is made of Gage's proposal that the horizontal energy spectrum at mesoscale wavelengths is produced by upscale energy transfer through quasi-two-dimensional turbulence. It is suggested that principal sources of such energy can be ...

D. K. Lilly

1983-03-01T23:59:59.000Z

15

A New Single-Layer Urban Canopy Model for Use in Mesoscale Atmospheric Models  

Science Conference Proceedings (OSTI)

A new single-layer urban canopy model for use in mesoscale atmospheric models is developed and validated. The urban canopy model represents a built-up area as a street canyon, two facing buildings, and a road. In this model, the two facing walls ...

Young-Hee Ryu; Jong-Jin Baik; Sang-Hyun Lee

2011-09-01T23:59:59.000Z

16

Initial Results from a Mesoscale Atmospheric Simulation System and Comparisons with the AVE-SESAME I Data Set  

Science Conference Proceedings (OSTI)

The development of a comprehensive mesoscale atmospheric simulation system (MASS) is described in detail. The modeling system is designed for both research and real-time forecast applications. The 14-level numerical model, which has a 48 km grid ...

Michael L. Kaplan; John W. Zack; Vince C. Wong; James J. Tuccillo

1982-11-01T23:59:59.000Z

17

Chromatin ionic atmosphere analyzed by a mesoscale electrostatic approach  

E-Print Network (OSTI)

ABSTRACT Characterizing the ionic distribution around chromatin is important for understanding the electrostatic forces governing chromatin structure and function. Here we develop an electrostatic model to handle multivalent ions and compute the ionic distribution around a mesoscale chromatin model as a function of conformation, number of nucleosome cores, and ionic strength and species using Poisson-Boltzmann theory. This approach enables us to visualize and measure the complex patterns of counterion condensation around chromatin by examining ionic densities, free energies, shielding charges, and correlations of shielding charges around the nucleosome core and various oligonucleosome conformations. We show that: counterions, especially divalent cations, predominantly condense around the nucleosomal and linker DNA, unburied regions of histone tails, and exposed chromatin surfaces; ionic screening is sensitively influenced by local and global conformations, with a wide ranging net nucleosome core screening charge (56–100e); and screening charge correlations reveal conformational flexibility and interactions among chromatin subunits, especially between the histone tails and parental nucleosome cores. These results provide complementary and detailed views of ionic effects on chromatin structure for modest computational resources. The electrostatic model developed here is applicable to other coarse-grained macromolecular complexes.

Hin Hark Gan; Tamar Schlick

2010-01-01T23:59:59.000Z

18

Effects of mesoscale surface inhomogeneities on atmospheric boundary layer transfer  

SciTech Connect

Defining the nature of turbulent transfer over horizontally inhomogeneous surfaces remains one of the challenges in meteorology. Because the transfer of energy and momentum through the atmospheric boundary layer forms part of the lower boundary condition for global climate models (GCMs), the problem is important. Over the last two decades, advances in sensor and computer technology wave made good point measurements of turbulent fluxes fairly routine. A fundamental question with respect to climate models, however, is how such point measurements are related to average fluxes over the area of a GCM grid box. In this paper we will use data from the field program to depict the evolution of the boundary layer over adjacent, sharply contrasting surface types on two separate occasions. We will then use simple scaling based on the observations to argue that sub-gridscale motions would often be likely to significantly alter the estimates and resulting parameterizations of GCM-scale surface fluxes in the region.

Shaw, W.J.; Doran, J.C.; Hubbe, J.M.

1992-09-01T23:59:59.000Z

19

A Numerical Study of the Mesoscale Atmospheric Circulation Observed during a Coastal Upwelling Event on 23 August 1972. Part I: Sensitivity Studies  

Science Conference Proceedings (OSTI)

A numerical model is used to study the effect of an Ocean surface temperature gradient on the mesoscale atmospheric circulation. The model is initialized with atmospheric data from 23 August 1972 over the central Oregon coastal zone. After the ...

Arthur Paul Mizzi; Roger A. Pielke

1984-01-01T23:59:59.000Z

20

Mesoscale Atmospheric Dispersion, 2001, Ed. Z. Boybeyi, WIT Publications, Southampton, UK, Advances in Air Pollution, Vol 9, p. 424.  

E-Print Network (OSTI)

Mesoscale Atmospheric Dispersion, 2001, Ed. Z. Boybeyi, WIT Publications, Southampton, UK, Advances in Air Pollution, Vol 9, p. 424. Chapter 9 Numerical modeling of gas deposition and bi- directional Dispersion, 2001, Ed. Z. Boybeyi, WIT Publications, Southampton, UK, Advances in Air Pollution, Vol 9, p. 424

Raman, Sethu

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

A Multiscale Observational Case Study of a Pacific Atmospheric River Exhibiting Tropical–Extratropical Connections and a Mesoscale Frontal Wave  

Science Conference Proceedings (OSTI)

A case study is presented of an atmospheric river (AR) that produced heavy precipitation in the U.S. Pacific Northwest during March 2005. The study documents several key ingredients from the planetary scale to the mesoscale that contributed to the ...

F. Martin Ralph; Paul J. Neiman; George N. Kiladis; Klaus Weickmann; David W. Reynolds

2011-04-01T23:59:59.000Z

22

Data Assimilation of Satellite-Derived Heating Rates as Proxy Surface Wetness Data into a Regional Atmospheric Mesoscale Model. Part I: Methodology  

Science Conference Proceedings (OSTI)

A satellite data assimilation method is developed which incorporates satellite-observed infrared heating rates into a mesoscale atmospheric model to retrieve model soil moisture. The method builds upon previous work with the model’s surface ...

Andrew S. Jones; Ingrid C. Guch; Thomas H. Vonder Haar

1998-03-01T23:59:59.000Z

23

Simple Modifications to Improve Fifth-Generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model Performance for the Phoenix, Arizona, Metropolitan Area  

Science Conference Proceedings (OSTI)

The diurnal temperature cycle in the Phoenix, Arizona, metropolitan area, as represented in the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5), is examined using a high-resolution 2-...

Joseph A. Zehnder

2002-09-01T23:59:59.000Z

24

On the Validation of the Simulation of Early Season Precipitation on the Island of Puerto Rico Using a Mesoscale Atmospheric Model  

Science Conference Proceedings (OSTI)

The ability of a mesoscale atmospheric model to reproduce the spatial distribution of the precipitation of the Caribbean island of Puerto Rico during an early rainfall season month (April) is evaluated in this paper, taking the month of April ...

Daniel E. Comarazamy; Jorge E. González

2008-06-01T23:59:59.000Z

25

Data Assimilation of Satellite-Derived Heating Rates as Proxy Surface Wetness Data into a Regional Atmospheric Mesoscale Model. Part II: A Case Study  

Science Conference Proceedings (OSTI)

A satellite data assimilation method is applied which incorporates satellite-observed heating infrared rates into a mesoscale atmospheric model to retrieve model soil moisture. In a 3D case study, the method is successful at retrieving realistic ...

Andrew S. Jones; Ingrid C. Guch; Thomas H. Vonder Haar

1998-03-01T23:59:59.000Z

26

Development and Analysis of Prognostic Equations for Mesoscale Kinetic Energy and Mesoscale (Subgrid Scale) Fluxes for Large-Scale Atmospheric Models  

Science Conference Proceedings (OSTI)

Mesoscale circulations generated by landscape discontinuities (e.g., sea breezes) are likely to have a significant impact on the hydrologic cycle, the climate, and the weather. However, these processes are not represented in large-scale ...

Roni Avissar; Fei Chen

1993-11-01T23:59:59.000Z

27

The Effects of Mesoscale Ocean–Atmosphere Coupling on the Large-Scale Ocean Circulation  

Science Conference Proceedings (OSTI)

Small-scale variation in wind stress due to ocean–atmosphere interaction within the atmospheric boundary layer alters the temporal and spatial scale of Ekman pumping driving the double-gyre circulation of the ocean. A high-resolution ...

Andrew Mc C. Hogg; William K. Dewar; Pavel Berloff; Sergey Kravtsov; David K. Hutchinson

2009-08-01T23:59:59.000Z

28

Warm-Season Effects of the Gulf Stream on Mesoscale Characteristics of the Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

The meteorological regime off the coast of North Carolina exhibits little synoptic-scale baroclinity during the summer months. As a result, the large-scale atmospheric forcing in this region is frequently weak. Given this weak synoptic forcing, ...

M. Sean Sublette; George S. Young

1996-04-01T23:59:59.000Z

29

The Impact of Satellite-Derived Atmospheric Motion Vectors on Mesoscale Forecasts over Hawaii  

Science Conference Proceedings (OSTI)

Tropospheric motions can be inferred from geostationary satellites by tracking clouds and water vapor in sequential imagery. These atmospheric motion vectors (AMV) have been operationally assimilated into global models for the past three decades, ...

T. Cherubini; S. Businger; C. Velden; R. Ogasawara

2006-07-01T23:59:59.000Z

30

Nonlinear Effects on Convectively Forced Two-Dimensional Mesoscale Flows  

Science Conference Proceedings (OSTI)

One of the important problems in mesoscale atmospheric dynamics is how the atmosphere responds to convective heating or cooling. Here, the authors examine nonlinear effects on convectively forced mesoscale flows in the context of the nonlinear ...

Ji-Young Han; Jong-Jin Baik

2012-11-01T23:59:59.000Z

31

Mesoscale Variations of the Atmospheric Snow Line over the Northern Sierra Nevada: Multiyear Statistics, Case Study, and Mechanisms  

Science Conference Proceedings (OSTI)

Observations from several mountain ranges reveal that the height of the transition from snowfall to rainfall, the snow line, can intersect the terrain at an elevation hundreds of meters below its elevation in the free air upwind. This mesoscale ...

Justin R. Minder; David E. Kingsmill

2013-03-01T23:59:59.000Z

32

A Comparison of Simple and Complex Treatments of Surface Hydrology and Thermodynamics Suitable for Mesoscale Atmospheric Models  

Science Conference Proceedings (OSTI)

Alternative treatments of the hydrologic and thermodynamic processes at the earth's surface within a mesoscale model are discussed in this study. Specifically, the question of under what circumstances it is necessary to use a complex surface ...

Mercedes N. Lakhtakia; Thomas T. Warner

1994-05-01T23:59:59.000Z

33

THE SIMULATION OF FINE SCALE NOCTURNAL BOUNDARY LAYER MOTIONS WITH A MESO-SCALE ATMOSPHERIC MODEL  

SciTech Connect

A field project over the Atmospheric Radiation Measurement-Clouds and Radiation Testbed (ARM-CART) site during a period of several nights in September, 2007 was conducted to explore the evolution of the low-level jet (LLJ). Data was collected from a tower and a sodar and analyzed for turbulent behavior. To study the full range of nocturnal boundary layer (NBL) behavior, the Regional Atmospheric Modeling System (RAMS) was used to simulate the ARM-CART NBL field experiment and validated against the data collected from the site. This model was run at high resolution, and is ideal for calculating the interactions among the various motions within the boundary layer and their influence on the surface. The model reproduces adequately the synoptic situation and the formation and dissolution cycles of the low-level jet, although it suffers from insufficient cloud production and excessive nocturnal cooling. The authors suggest that observed heat flux data may further improve the realism of the simulations both in the cloud formation and in the jet characteristics. In a higher resolution simulation, the NBL experiences motion on a range of timescales as revealed by a wavelet analysis, and these are affected by the presence of the LLJ. The model can therefore be used to provide information on activity throughout the depth of the NBL.

Werth, D.; Kurzeja, R.; Parker, M.

2009-04-02T23:59:59.000Z

34

Atmospheric Dispersion at Spatial Resolutions Below Mesoscale for university of Tennessee SimCenter at Chattanooga: Final Report  

SciTech Connect

In Year 1 of this project, items 1.1 and 1.2 were addressed, as well as item 2.2. The baseline parallel computational simulation tool has been refined significantly over the timeline of this project for the purpose of atmospheric dispersion and transport problems; some of these refinements are documented in Chapter 3. The addition of a concentration transport capability (item 1.2) was completed, along with validation and usage in a highly complex urban environment. Multigrid capability (item 2.2) was a primary focus of Year 1 as well, regardless of the fact that it was scheduled for Year 2. It was determined by the authors that due to the very large nature of the meshes required for atmospheric simulations at mesoscale, multigrid was a key enabling technology for the rest of the project to be successful. Therefore, it was addressed early according to the schedule laid out in the original proposal. The technology behind the multigrid capability is discussed in detail in Chapter 5. Also in Year 1, the issue of ground topography specification is addressed. For simulations of pollutant transport in a given region, a key prerequisite is the specification of the detailed ground topography. The local topography must be placed into a form suitable for generating an unstructured grid both on the topography itself and the atmospheric volume above it; this effort is documented in Chapter 6. In Year 2 of this project, items 1.3 and 2.1 were addressed. Weather data in the form of wind speeds, relative humidity, and baseline pollution levels may be input into the code in order to improve the real-world fidelity of the solutions. Of course, the computational atmospheric boundary layer (ABL) boundary condition developed in Year 1 may still be used when necessary. Cloud cover may be simulated via the levels of actinic flux allowed in photochemical reactions in the atmospheric chemistry model. The primary focus of Year 2 was the formulation of a multispecies capability with included chemical reactions (item 2.1). This proved to be a very arduous task, taking the vast majority of the time and personnel allocation for Year Two. The addition of this capability and related verification is documented in Chapter 7. A discussion of available tropospheric chemistry models is located in Chapter 8; and, a technology demonstrator for the full multispecies capability is detailed in Chapter 9. Item 2.3 has been partially addressed, in that the computation of sensitivity derivatives have been incorporated in the Tenasi code [7]. However, it has not been utilized in this project in order to compute probability distribution functions for pollutant deposition. In order to completely address the integration of weather and sensor data into the code (item 1.3) and integrate with existing sensor networks (item 3.1), a customizable interface was established. Weather data is most commonly available via a real database, and as such, support for accessing these databases is present in the solver source code. For integration functionality, a method of dynamic code customization was developed in Year 3, which is documented in Chapter 11.

Dr. David Whitfield; Dr. Daniel Hyams

2009-09-14T23:59:59.000Z

35

A Study of a Mesoscale Solitary Wave in the Atmosphere Originating near a Region of Deep Convection  

Science Conference Proceedings (OSTI)

An analysis of a mesoscale wave which occurred over the eastern United States on 6 March 1969 is presented. Its origin is attributed to the perturbation of a midtropospheric inversion by a squall line. After the wave formed, it propagated in the ...

Yuh-Lang Lin; R. Craig Goff

1988-01-01T23:59:59.000Z

36

Karlsruhe Institute for Industrial Production | Open Energy Information  

Open Energy Info (EERE)

Karlsruhe Institute for Industrial Production Karlsruhe Institute for Industrial Production Jump to: navigation, search Name Karlsruhe Institute for Industrial Production Place Karlsruhe, Germany Zip 76187 Product String representation "Karlsruhe-based ... tment concepts." is too long. References Karlsruhe Institute for Industrial Production[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Karlsruhe Institute for Industrial Production is a company located in Karlsruhe, Germany . References ↑ "Karlsruhe Institute for Industrial Production" Retrieved from "http://en.openei.org/w/index.php?title=Karlsruhe_Institute_for_Industrial_Production&oldid=347948" Categories: Clean Energy Organizations

37

Zentrum fr Lehrerbildung Karlsruhe, Januar 2013 Praxissemester  

E-Print Network (OSTI)

#12;Lehramtsstudierende am KIT (WS 11/12) Mathematik ; 408 Physik; 148 Chemie; 159 Biologie; 71 Deutsch; 310 Sport; 171 Geographie; 332 NwT; 41 #12;Zentrum für Lehrerbildung Karlsruhe, Januar 2013

Stein, Oliver

38

Mesoscale Evolution of a Continental Occluded Cyclone  

Science Conference Proceedings (OSTI)

A diagnostic study of a continental occluding extratropical cyclone (ETC) during 1–2 November 1992 is presented using initializations from the Mesoscale Atmospheric Prediction System (MAPS), a hybrid sigma–isentropic coordinate model. Whereas ...

Patrick S. Market; James T. Moore

1998-07-01T23:59:59.000Z

39

Real-Time Mesoscale Prediction on workstations  

Science Conference Proceedings (OSTI)

Experience in performing real-time mesoscale numerical prediction forecasts using the Regional Atmospheric Modeling System (RAMS) over Colorado for a winter season on high-performance workstations is summarized. Performance evaluation is done for ...

William R. Cotton; Gregory Thompson; Paul W. Mieike Jr.

1994-03-01T23:59:59.000Z

40

Hierarchy of Mesoscale Flow Assumptions and Equations  

Science Conference Proceedings (OSTI)

The present research proposes a standard nomenclature for mesoscale meteorological concepts and integrates existing concepts of atmospheric space scales, flow assumptions, governing equations, and resulting motions into a hierarchy useful in ...

P. Thunis; R. Bornstein

1996-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Predicting Tephra Dispersion with a Mesoscale Atmospheric Model and a Particle Fall Model: Application to Cerro Negro Volcano  

Science Conference Proceedings (OSTI)

Models of volcanic ash (tephra) fallout are increasingly used to assess volcanic hazards in advance of eruptions and in near–real time. These models often approximate the wind field using simplistic assumptions of the atmosphere that do not ...

Marc A. Byrne; Arlene G. Laing; Charles Connor

2007-02-01T23:59:59.000Z

42

Recent Applications of the Penn State/NCAR Mesoscale Model to Synoptic, Mesoscale, and Climate Studies  

Science Conference Proceedings (OSTI)

This paper summarizes recent studies of a variety of atmospheric phenomena in different parts of the world using the Penn State/NCAR mesoscale model. These phenomena include explosive cyclogenesis over the North Pacific and North Atlantic swans, ...

Richard A. Anthes

1990-11-01T23:59:59.000Z

43

The Application of an Evolutionary Algorithm to the Optimization of a Mesoscale Meteorological Model  

Science Conference Proceedings (OSTI)

It is shown that a simple evolutionary algorithm can optimize a set of mesoscale atmospheric model parameters with respect to agreement between the mesoscale simulation and a limited set of synthetic observations. This is illustrated using the ...

Lance O’Steen; David Werth

2009-02-01T23:59:59.000Z

44

Nonlinear Influence of Mesoscale Land Use on Weather and Climate  

Science Conference Proceedings (OSTI)

This paper demonstrates that the influence of mesoscale landscape spatial variability on the atmosphere must be parameterized (or explicitly modeled) in larger-scale atmospheric model simulations including general circulation models. The ...

R. A. Pielke; G. A. Dalu; J. S. Snook; T. J. Lee; T. G. F. Kittel

1991-11-01T23:59:59.000Z

45

The “Footprint” under a Decaying Tropical Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 10 February 1993, during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment, the two NOAA WP-3Ds and the NCAR Electra flew under the anvil region of a decaying mesoscale convective system (MCS). Satellite and ...

Mark F. Geldmeier; Gary M. Barnes

1997-11-01T23:59:59.000Z

46

Spatiotemporal Trends in Episodic Ozone Pollution in the Lower Fraser Valley, British Columbia, in Relation to Mesoscale Atmospheric Circulation Patterns and Emissions  

Science Conference Proceedings (OSTI)

A cluster analysis of wind measurements from two meteorological stations in the Lower Fraser Valley, British Columbia, Canada, has been performed to identify mesoscale circulation regimes that are common to days on which ozone mixing ratios at ...

B. Ainslie; D. G. Steyn

2007-10-01T23:59:59.000Z

47

Relationship between Precipitation Rates at the Ground and Aloft—A Modeling Study  

Science Conference Proceedings (OSTI)

Two cloud-resolving mesoscale models, the Karlsruhe Atmospheric Mesoscale Model (KAMM) and the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5), were used to study reflectivity factor–...

Nikolai Dotzek; Thorsten Fehr

2003-09-01T23:59:59.000Z

48

Extracting Synoptic-Scale Diagnostic Information from Mesoscale Models: The Eta Model, Gravity Waves, and Quasigeostrophic Diagnostics  

Science Conference Proceedings (OSTI)

Fine-mesh models, such as the eta model, are producing increasingly detailed predictions about mesoscale atmospheric motions. Mesoscale systems typically produce stronger vertical motions than do synoptic-scale storms, making it more difficult ...

Stanley L. Barnes; Fernando Caracena; Adrian Marroquin

1996-03-01T23:59:59.000Z

49

Mesoscale Cloud State Estimation from Visible and Infrared Satellite Radiances  

Science Conference Proceedings (OSTI)

This study focuses on cloudy atmosphere state estimation from high-resolution visible and infrared satellite remote sensing measurements and a mesoscale model with explicit cloud prediction. The cloud state is defined as 3D spatially distributed ...

T. Vukicevic; T. Greenwald; M. Zupanski; D. Zupanski; T. Vonder Haar; A. S. Jones

2004-12-01T23:59:59.000Z

50

Using Radar Wind Observations to Improve Mesoscale Numerical Weather Prediction  

Science Conference Proceedings (OSTI)

A high-resolution radar data assimilation system is presented for high-resolution numerical weather prediction models. The system is under development at the Naval Research Laboratory for the Navy’s Coupled Ocean–Atmosphere Mesoscale Prediction ...

Qingyun Zhao; John Cook; Qin Xu; Paul R. Harasti

2006-08-01T23:59:59.000Z

51

A Numerical Investigation of a Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 25 April 1975, as part of the National Aeronautics and Space Administration's Atmospheric Variability Experiment IV, frequent upper-air soundings were taken at eastern United States synoptic sounding sites. An intense, long-lived mesoscale ...

Donald J. Perkey; Robert A. Maddox

1985-04-01T23:59:59.000Z

52

Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra  

Science Conference Proceedings (OSTI)

Kinetic energy spectra derived from observations in the free atmosphere possess a wavenumber dependence of k?3 for large scales, characteristic of 2D turbulence, and transition to a k?5/3 dependence in the mesoscale. Kinetic energy spectra ...

William C. Skamarock

2004-12-01T23:59:59.000Z

53

The Use of Wind Profilers in a Mesoscale Experiment  

Science Conference Proceedings (OSTI)

During May and June of 1985, an experiment to study mesoscale convective systems (MCSs) was carried out in central Kansas and Oklahoma, using many of the latest measurement technologies in the atmospheric sciences. Among these were three 50-MHz ...

John A. Augustine; Edward J. Zipser

1987-01-01T23:59:59.000Z

54

The Mesoscale Kinetic Energy Spectrum of a Baroclinic Life Cycle  

Science Conference Proceedings (OSTI)

The atmospheric mesoscale kinetic energy spectrum is investigated through numerical simulations of an idealized baroclinic wave life cycle, from linear instability to mature nonlinear evolution and with high horizontal and vertical resolution (?x ...

Michael L. Waite; Chris Snyder

2009-04-01T23:59:59.000Z

55

Diabatic Divergence Profiles in Western Pacific Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Heating in the atmosphere can be expressed as diabatic divergence ?d, which is nearly equal to the actual horizontal divergence ? in tropical convection. High-quality ? profile measurements from airborne Doppler radar “purls” in ten mesoscale ...

Brian E. Mapes; Robert A. Houze Jr.

1995-05-01T23:59:59.000Z

56

Mesoscale Influences of Wind Farms throughout a Diurnal Cycle  

Science Conference Proceedings (OSTI)

Large wind farms are expected to influence local and regional atmospheric circulations. Using a mesoscale parameterization of the effects of wind farms that includes a momentum sink and a wind speed–dependent source of turbulent kinetic energy, ...

Anna C. Fitch; Julie K. Lundquist; Joseph B. Olson

2013-07-01T23:59:59.000Z

57

Poleward Buoyancy Transport in the Ocean and Mesoscale Eddies  

Science Conference Proceedings (OSTI)

There are many dynamic similarities between mesoscale eddies in the ocean, and cyclones and anticyclones in the earth's atmosphere. Observational data, however, are still not adequate to explore this analogy in detail. In the present study a new ...

Kirk Bryan

1986-05-01T23:59:59.000Z

58

A Global Version of the PSU–NCAR Mesoscale Model  

Science Conference Proceedings (OSTI)

A global version of the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (PSU–NCAR MM5) is described. The new model employs two polar stereographic projection domains centered on each pole. ...

Jimy Dudhia; James F. Bresch

2002-12-01T23:59:59.000Z

59

Mesoscale Monitoring of Soil Moisture across a Statewide Network  

Science Conference Proceedings (OSTI)

Soil moisture is an important component in many hydrologic and land–atmosphere interactions. Understanding the spatial and temporal nature of soil moisture on the mesoscale is vital to determine the influence that land surface processes have on ...

Bradley G. Illston; Jeffrey B. Basara; Christopher A. Fiebrich; Kenneth C. Crawford; Eric Hunt; Daniel K. Fisher; Ronald Elliott; Karen Humes

2008-02-01T23:59:59.000Z

60

A Numerical Study of a Mesoscale Convective System during TOGA COARE. Part II: Organization  

Science Conference Proceedings (OSTI)

In Part I, the authors presented a successful numerical simulation of the life cycle of a warm-pool mesoscale convective system (MCS) that occurred on 15 December 1992 during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response ...

Badrinath Nagarajan; M. K. Yau; Da-Lin Zhang

2004-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Interactions between a Developing Mesoscale Convective System and Its Environment. Part II: Numerical Simulation  

Science Conference Proceedings (OSTI)

The 19 July 1993 mesoscale convective system (MCS), discussed in Part I, was simulated using the Regional Atmospheric Modeling System (RAMS). The model was initialized with variable physiographic and atmospheric data with the goal of reproducing ...

Jason E. Nachamkin; William R. Cotton

2000-05-01T23:59:59.000Z

62

Tests of an Adjoint Mesoscale Model with Explicit Moist Physics on the Cloud Scale  

Science Conference Proceedings (OSTI)

An adjoint modeling system based upon the Naval Research Laboratory’s Coupled Ocean–Atmosphere Mesoscale Prediction System’s atmospheric component has been developed. The system includes the adjoint model of the explicit moist physics ...

Clark Amerault; Xiaolei Zou; James Doyle

2008-06-01T23:59:59.000Z

63

Multifunctional Mesoscale Observing Networks  

Science Conference Proceedings (OSTI)

More than 120 scientists, engineers, administrators, and users met on 8–10 December 2003 in a workshop format to discuss the needs for enhanced three-dimensional mesoscale observing networks. Improved networks are seen as being critical to ...

Walter F. Dabberdt; Thomas W. Schlatter; Frederick H. Carr; Elbert W. Joe Friday; David Jorgensen; Steven Koch; Maria Pirone; F. Martin Ralph; Juanzhen Sun; Patrick Welsh; James W. Wilson; Xiaolei Zou

2005-07-01T23:59:59.000Z

64

Mesoscale Atmospheric Modeling Using a High Horizontal Grid Resolution over a Complex Coastal Terrain and a Wine Region of South Africa  

Science Conference Proceedings (OSTI)

The Regional Atmospheric Modeling System (RAMS) was used to assess local air circulation patterns over the wine-producing Stellenbosch region of South Africa. Numerical simulations using four nested grids (25, 5, and 1 km, and 200 m of horizontal ...

V. Bonnardot; S. Cautenet

2009-02-01T23:59:59.000Z

65

1396 JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY VOLUME 46 A Combined Local and Nonlocal Closure Model for the Atmospheric Boundary Layer. Part II: Application and Evaluation in a Mesoscale Meteorological Model  

E-Print Network (OSTI)

A new combined local and nonlocal closure atmospheric boundary layer model called the Asymmetric Convective Model, version 2, (ACM2) was described and tested in one-dimensional form and was compared with large-eddy simulations and field data in Part I. Herein, the incorporation of the ACM2 into the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) is described. Model simulations using the MM5 with the ACM2 are made for the summer of 2004 and evaluated through comparison with surface meteorological measurements, rawinsonde profile measurements, and observed planetary boundary layer (PBL) heights derived from radar wind profilers. Overall model performance is as good as or better than similar MM5 evaluation studies. The MM5 simulations with the ACM2 compare particularly well to PBL heights derived from radar wind profilers during the afternoon hours. The ACM2 is designed to simulate the vertical mixing of any modeled quantity realistically for both meteorological models and air quality models. The next step, to be described in a subsequent article, is to incorporate the ACM2 into the Community Multiscale Air Quality (CMAQ) model for testing and evaluation. 1.

Jonathan E. Pleim

2006-01-01T23:59:59.000Z

66

Investigating the Influence of Synoptic-Scale Monsoonal Winds and Mesoscale Circulations on Diurnal Weather Patterns over Kenya Using a Mesoscale Numerical Model  

Science Conference Proceedings (OSTI)

The Regional Atmospheric Modeling System (RAMS) developed at Colorado State University (CSU) was used to investigate the influence of the large-scale monsoonal winds and the mesoscale local circulations on the diurnal precipitation pattern over ...

Joseph R. Mukabana; Roger A. Piekle

1996-02-01T23:59:59.000Z

67

A Combined Local and Nonlocal Closure Model for the Atmospheric Boundary Layer. Part II: Application and Evaluation in a Mesoscale Meteorological Model  

Science Conference Proceedings (OSTI)

A new combined local and nonlocal closure atmospheric boundary layer model called the Asymmetric Convective Model, version 2, (ACM2) was described and tested in one-dimensional form and was compared with large-eddy simulations and field data in ...

Jonathan E. Pleim

2007-09-01T23:59:59.000Z

68

The Simulation of the Southern Great Plains Nocturnal Boundary Layer and the Low-Level Jet with a High-Resolution Mesoscale Atmospheric Model  

Science Conference Proceedings (OSTI)

A field project over the Atmospheric Radiation Measurement–Cloud and Radiation Test Bed (ARM–CART) site during a period of several nights in September 2007 was conducted to explore the evolution of the low-level jet (LLJ). Data were collected from ...

David Werth; Robert Kurzeja; Nelson Luís Dias; Gengsheng Zhang; Henrique Duarte; Marc Fischer; Matthew Parker; Monique Leclerc

2011-07-01T23:59:59.000Z

69

A Numerical Study of a Mesoscale Convective System during TOGA COARE. Part I: Model Description and Verification  

Science Conference Proceedings (OSTI)

A 16-h numerical simulation of the growing and mature stages of the 15 December 1992 Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment (TOGA COARE) mesoscale convective system (MCS) is performed to demonstrate the ...

Badrinath Nagarajan; M. K. Yau; Da-Lin Zhang

2001-10-01T23:59:59.000Z

70

Mesoscale Processes Contributing to Extreme Rainfall in a Midlatitude Warm-Season Flash Flood  

Science Conference Proceedings (OSTI)

Observations and numerical simulations are used to investigate the atmospheric processes that led to extreme rainfall and resultant destructive flash flooding in eastern Missouri on 6–7 May 2000. In this event, a quasi-stationary mesoscale ...

Russ S. Schumacher; Richard H. Johnson

2008-10-01T23:59:59.000Z

71

Polar Mesoscale Cyclones in the Northeast Atlantic: Comparing Climatologies from ERA-40 and Satellite Imagery  

Science Conference Proceedings (OSTI)

Polar mesoscale cyclones over the subarctic are thought to be an important component of the coupled atmosphere–ocean climate system. However, the relatively small scale of these features presents some concern as to their representation in the ...

Alan Condron; Grant R. Bigg; Ian A. Renfrew

2006-05-01T23:59:59.000Z

72

Assimilation of DMSP and TOVS Satellite Soundings in a Mesoscale Model  

Science Conference Proceedings (OSTI)

A modeling investigation explores the impacts of the assimilation of satellite-retrieved soundings on forecast error in the Fifth-Generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5). Simulations ...

Jordan G. Powers; Kun Gao

2000-10-01T23:59:59.000Z

73

The Influence of Coastal Shape on Winter Mesoscale Air-Sea Interaction  

Science Conference Proceedings (OSTI)

In the case of cold air outbreaks, the combination of the coastal shape and the sea surface temperature (SST) pattern is shown to have a profound effect in establishing a low level mesoscale atmospheric circulation as a result of differential ...

David Atlas; Shu-Hsien Chou; William P. Byerly

1983-02-01T23:59:59.000Z

74

Mesoscale Modeling of Katabatic Winds over Greenland with the Polar MM5  

Science Conference Proceedings (OSTI)

Verification of two months, April and May 1997, of 48-h mesoscale model simulations of the atmospheric state around Greenland are presented. The simulations are performed with a modified version of The Pennsylvania State University–National ...

David H. Bromwich; John J. Cassano; Thomas Klein; Gunther Heinemann; Keith M. Hines; Konrad Steffen; Jason E. Box

2001-09-01T23:59:59.000Z

75

Implementation of an Urban Canopy Parameterization in a Mesoscale Meteorological Model  

Science Conference Proceedings (OSTI)

An urban canopy parameterization (UCP) is implemented into the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) to improve meteorological fields in the urban boundary layer for ...

Tanya L. Otte; Avraham Lacser; Sylvain Dupont; Jason K. S. Ching

2004-11-01T23:59:59.000Z

76

Mesoscale Simulation of Supercritical, Subcritical, and Transcritical Flow along Coastal Topography  

Science Conference Proceedings (OSTI)

A mesoscale atmospheric model is used to address the characteristics of stratified flow bounded by a side wall along a varying coastline. Initial Froude number values are varied through alteration of marine inversion strength, permitting ...

Stephen D. Burk; Tracy Haack; R. M. Samelson

1999-08-01T23:59:59.000Z

77

Mesoscale Convective Vortex Formation in a Weakly Sheared Moist Neutral Environment  

Science Conference Proceedings (OSTI)

Idealized simulations of a diabatic Rossby vortex (DRV) in an initially moist neutral baroclinic environment are performed using the fifth-generation National Center for Atmospheric Research–Pennsylvania State University (NCAR–PSU) Mesoscale ...

Robert J. Conzemius; Richard W. Moore; Michael T. Montgomery; Christopher A. Davis

2007-05-01T23:59:59.000Z

78

Evaluation of an Urban Canopy Parameterization in a Mesoscale Model Using VTMX and URBAN 2000 Data  

Science Conference Proceedings (OSTI)

A modified urban canopy parameterization (UCP) is developed and evaluated in a three-dimensional mesoscale model to assess the urban impact on surface and lower-atmospheric properties. This parameterization accounts for the effects of building ...

Hung-Neng S. Chin; Martin J. Leach; Gayle A. Sugiyama; John M. Leone Jr.; Hoyt Walker; J. S. Nasstrom; Michael J. Brown

2005-07-01T23:59:59.000Z

79

Mesoscale Modeling and Four-Dimensional Data Assimilation in Areas of Highly Complex Terrain  

Science Conference Proceedings (OSTI)

A multiscale four-dimensional data assimilation (FDDA) technique, based on Newtonian relaxation, is incorporated into a mesoscale model and evaluated using meteorological and tracer data collected during the Atmospheric Studies in Complex Terrain ...

J. D. Fast

1995-12-01T23:59:59.000Z

80

Dynamical Analysis of the Boundary Layer and Surface Wind Responses to Mesoscale SST Perturbations  

Science Conference Proceedings (OSTI)

The dynamical response of the marine atmospheric boundary layer (MABL) to mesoscale sea surface temperature (SST) perturbations is investigated over the Agulhas Return Current during winter from a 1-month, high-resolution, three-dimensional ...

Larry W. O’Neill; Steven K. Esbensen; Nicolai Thum; Roger M. Samelson; Dudley B. Chelton

2010-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Mesoscale Weather Prediction with the RUC Hybrid Isentropic–Terrain-Following Coordinate Model  

Science Conference Proceedings (OSTI)

A mesoscale atmospheric forecast model configured in a hybrid isentropic–sigma vertical coordinate and used in the NOAA Rapid Update Cycle (RUC) for operational numerical guidance is presented. The RUC model is the only quasi-isentropic forecast ...

Stanley G. Benjamin; Georg A. Grell; John M. Brown; Tatiana G. Smirnova; Rainer Bleck

2004-02-01T23:59:59.000Z

82

Mesoscale Analysis by Numerical Modeling Coupled with Sounding Retrieval from Satellites  

Science Conference Proceedings (OSTI)

The development and evaluation of a system for time-continuous mesoscale analysis is presented, with a focus on retrieving water vapor concentrations and ground surface temperatures from VISSR Atmospheric Sounder (VAS) data. The analysis system ...

Alan E. Lipton; Thomas H. Vonder Haar

1990-06-01T23:59:59.000Z

83

Simulating the Transition from Drizzling Marine Stratocumulus to Boundary Layer Cumulus with a Mesoscale Model  

Science Conference Proceedings (OSTI)

A case of coastal California summer season boundary layer cloud has been simulated with the U.S. Navy Coupled Ocean–Atmosphere Mesoscale Prediction System and the results analyzed in the context of consistency with conclusions derived from large ...

David B. Mechem; Yefim L. Kogan

2003-10-01T23:59:59.000Z

84

Evaluations of Mesoscale Models' Simulations of Near-Surface Winds, Temperature Gradients, and Mixing Depths  

Science Conference Proceedings (OSTI)

Mesoscale meteorological models are being used to provide inputs of winds, vertical temperature and stability structure, mixing depths, and other parameters to atmospheric transport and dispersion models. An evaluation methodology is suggested ...

Steven R. Hanna; Ruixin Yang

2001-06-01T23:59:59.000Z

85

Evaluation of the NCEP Mesoscale Eta Model Convective Boundary Layer for Air Quality Applications  

Science Conference Proceedings (OSTI)

Atmospheric models are a basic tool for understanding the processes that produce poor air quality, for predicting air quality problems, and for evaluating proposed solutions. At the base of many air quality models is a mesoscale meteorological ...

Wayne M. Angevine; Kenneth Mitchell

2001-11-01T23:59:59.000Z

86

Evaluating Mesoscale Model Predictions of Clouds and Radiation with SGP ARM Data over a Seasonal Timescale  

Science Conference Proceedings (OSTI)

This study evaluates the predictions of radiative and cloud-related processes of the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5). It is based on extensive comparison of ...

Françoise Guichard; David B. Parsons; Jimy Dudhia; James Bresch

2003-05-01T23:59:59.000Z

87

Mesoscale hybrid calibration artifact  

DOE Patents (OSTI)

A mesoscale calibration artifact, also called a hybrid artifact, suitable for hybrid dimensional measurement and the method for make the artifact. The hybrid artifact has structural characteristics that make it suitable for dimensional measurement in both vision-based systems and touch-probe-based systems. The hybrid artifact employs the intersection of bulk-micromachined planes to fabricate edges that are sharp to the nanometer level and intersecting planes with crystal-lattice-defined angles.

Tran, Hy D. (Albuquerque, NM); Claudet, Andre A. (Albuquerque, NM); Oliver, Andrew D. (Waltham, MA)

2010-09-07T23:59:59.000Z

88

The impact of agricultural intensification and irrigation on landatmosphere interactions and Indian monsoon precipitation --A mesoscale modeling perspective  

E-Print Network (OSTI)

and Indian monsoon precipitation -- A mesoscale modeling perspective E.M. Douglas a, , A. Beltrán-Przekurat b: irrigation Indian monsoon Regional Atmospheric Modeling System agriculture Land Use Land Cover Change Using convergence, mesoscale convection, and precipitation patterns over the Indian monsoon region. Four experiments

Niyogi, Dev

89

The impact of agricultural intensification and irrigation on landatmosphere interactions and Indian monsoon precipitation --A mesoscale modeling perspective  

E-Print Network (OSTI)

and Indian monsoon precipitation -- A mesoscale modeling perspective E.M. Douglas a, , A. Beltrán-Przekurat b Keywords: irrigation Indian monsoon Regional Atmospheric Modeling System agriculture Land Use Land Cover and regional convergence, mesoscale convection, and precipitation patterns over the Indian monsoon region. Four

Douglas, Ellen M.

90

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

91

Atmospheric Response to Local Upwelling in the Vicinity of New York–New Jersey Harbor  

Science Conference Proceedings (OSTI)

Multiply nested urbanized mesoscale model [Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS)] simulations of the New York–New Jersey metropolitan region are conducted for 4–11 July 2004. The simulations differ only in their ...

Julie Pullen; Teddy Holt; Alan F. Blumberg; Robert D. Bornstein

2007-07-01T23:59:59.000Z

92

Mesoscale Coupled Ocean-Atmosphere Interaction  

E-Print Network (OSTI)

Its Relationship to Atlantic Tropical Cyclone Activity. J.destructiveness of tropical cyclones over the past 30 years.Distribution in Tropical Cyclones Using the Tropical

Seo, Hyodae

2007-01-01T23:59:59.000Z

93

Mesoscale coupled ocean-atmosphere interaction  

E-Print Network (OSTI)

Its Relationship to Atlantic Tropical Cyclone Activity. J.destructiveness of tropical cyclones over the past 30 years.Distribution in Tropical Cyclones Using the Tropical

Seo, Hyodae

2007-01-01T23:59:59.000Z

94

Mesoscale Coupled Ocean-Atmosphere Interaction  

E-Print Network (OSTI)

coastal ocean to strong offshore winds: With application toand R. L. Smith, 1995: Offshore wind forcing in the Gulf ofwind stress maximum and CCS SST front located roughly 200 km further offshore

Seo, Hyodae

2007-01-01T23:59:59.000Z

95

Mesoscale coupled ocean-atmosphere interaction  

E-Print Network (OSTI)

coastal ocean to strong offshore winds: With application toand R. L. Smith, 1995: Offshore wind forcing in the Gulf ofwind stress maximum and CCS SST front located roughly 200 km further offshore

Seo, Hyodae

2007-01-01T23:59:59.000Z

96

Sensitivity of Convective Cloud Growth to Mesoscale Lifting: A Numerical Analysis of Mesoscale Convective Triggering  

Science Conference Proceedings (OSTI)

Numerical model simulation of mesoscale lifting of the convective environment indicates that the ability of the environment to develop deep moist convection increases as mesoscale lifting increases. Mesoscale lifting produces increases in modeled ...

David A. Matthews; Bernard A. Silverman

1980-07-01T23:59:59.000Z

97

Turbulence Spectra and Dissipation Rates in a Wind Tunnel Model of the Atmospheric Convective Boundary Layer  

Science Conference Proceedings (OSTI)

A model of the atmospheric convective boundary layer (CBL) is realized in the thermally stratified wind tunnel of the Institute of Hydrology and Water Resources, University of Karlsruhe. Further experimental results from this model are presented. ...

Rolf Kaiser; Evgeni Fedorovich

1998-02-01T23:59:59.000Z

98

Mesoscale Convective Complexes in Africa  

Science Conference Proceedings (OSTI)

Digitized full-disk infrared satellite imagery from the European geostationary satellite (Meteosat) for 1986 and 1987 was used to construct a climatology of mesoscale convective complexes (MCCs) in Africa One hundred ninety-five systems formed ...

Arlene G. Laing; J. Michael Fritsch

1993-08-01T23:59:59.000Z

99

Radiative Transfer Simulations Using Mesoscale Cloud Model Outputs: Comparisons with Passive Microwave and Infrared Satellite Observations for Midlatitudes  

Science Conference Proceedings (OSTI)

Real midlatitude meteorological cases are simulated over western Europe with the cloud mesoscale model Méso-NH, and the outputs are used to calculate brightness temperatures at microwave frequencies with the Atmospheric Transmission at Microwave (...

Ingo Meirold-Mautner; Catherine Prigent; Eric Defer; Juan R. Pardo; Jean-Pierre Chaboureau; Jean-Pierre Pinty; Mario Mech; Susanne Crewell

2007-05-01T23:59:59.000Z

100

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

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Challenges in Mesoscale Prediction of a Nocturnal Stratocumulus-Topped Marine Boundary Layer and Implications for Operational Forecasting  

Science Conference Proceedings (OSTI)

A numerical study using the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) was performed to assess the impact of initial and boundary conditions, the parameterization of turbulence ...

Ramesh Vellore; Darko Kora?in; Melanie Wetzel; Steven Chai; Qing Wang

2007-10-01T23:59:59.000Z

102

Observations of a Terrain-Forced Mesoscale Vortex and Canyon Drainage Flows along the Front Range of Colorado  

Science Conference Proceedings (OSTI)

Observations taken during the February 1991 Atmospheric Studies in Complex Terrain (ASCOT) Winter Validation Study are used to describe the wind field associated with a terrain-forced mesoscale vortex and thermally forced canyon drainage flows ...

David H. Levinson; Robert M. Banta

1995-07-01T23:59:59.000Z

103

Theoretical Studies of Convectively Forced Mesoscale Flows in Three Dimensions. Part I: Uniform Basic-State Flow  

Science Conference Proceedings (OSTI)

Convectively forced mesoscale flows in three dimensions are theoretically investigated by examining the transient response of a stably stratified atmosphere to convective heating. Solutions for the equations governing small-amplitude ...

Ji-Young Han; Jong-Jin Baik

2009-04-01T23:59:59.000Z

104

The Sensitivity of a Simulated Extratropical Mesoscale Convective System to Longwave Radiation and Ice-Phase Microphysics  

Science Conference Proceedings (OSTI)

A two-dimensional, nonhydrostatic version of the Colorado State University Regional Atmospheric Modeling System (RAMS) was applied to the simulation of a midlatitude, continental mesoscale convective system. A control simulation was established ...

Sue Chen; William R. Cotton

1988-12-01T23:59:59.000Z

105

A Climatological Study of Boundary Layer Wind Speed Using a Meso-?-Scale Higher-Order Closure Model  

Science Conference Proceedings (OSTI)

A mesoscale higher-order closure atmospheric boundary layer model has been used to get more detailed information than is possible from observations regarding horizontal and vertical variations of the wind in an area in southeastern Sweden. To ...

Hans Bergström

1996-08-01T23:59:59.000Z

106

Mesoscale Numerical Study of Two Cases of Long-Lived Quasi-Stationary Convective Systems over Eastern Spain  

Science Conference Proceedings (OSTI)

A set of mesoscale numerical simulations using the Pennsylvania State University–National Center for Atmospheric Research model is used to investigate two cases of extreme precipitation over eastern Spain. Both cases (3–4 November 1987 and 20 ...

R. Romero; C. A. Doswell III; C. Ramis

2000-11-01T23:59:59.000Z

107

Numerical Simulation of Dispersal of Inert Seeding Material in Israel Using a Three-Dimensional Mesoscale Model  

Science Conference Proceedings (OSTI)

A mesoscale model RAMS (the Regional Atmospheric Modeling System) was used to investigate the effectiveness of the broadcast static seeding method for dispersing particles into clouds, as it is used in Israel. The model was run using three nested ...

Zev Levin; Shimon O. Krichak; Tamir Reisin

1997-05-01T23:59:59.000Z

108

Using Similarity Theory to Parameterize Mesoscale Heat Fluxes Generated by Subgrid-Scale Landscape Discontinuities in GCMs  

Science Conference Proceedings (OSTI)

Similarity theory was used to develop a parameterization of mesoscale heat fluxes induced by landscape discontinuities for large-scale atmospheric models (e.g., general circulation models). For this purpose, Buckingham Pi theory, a systematic ...

Barry H. Lynn; Frank Abramopoulos; Roni Avissar

1995-04-01T23:59:59.000Z

109

Quantification of Predictive Skill for Mesoscale and Synoptic-Scale Meteorological Features as a Function of Horizontal Grid Resolution  

Science Conference Proceedings (OSTI)

To quantitatively assess numerical predictive skill for synoptic and mesoscale features as a function of horizontal grid resolution, a series of experiments is conducted using the Pennsylvania State University-National Center for Atmospheric ...

Stephen S. Weygandt; Nelson L. Seaman

1994-01-01T23:59:59.000Z

110

Poster Sessions J. Dudhia Mesoscale and Microscale Meteorology Division  

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

J. Dudhia J. Dudhia Mesoscale and Microscale Meteorology Division National Center for Atmospheric Research Boulder, CO 80307-3000 Introduction The concept of an Integrated Data Assimilation and Sounding System (IDASS) ensures that the needs of data collection are partly determined by the requirements of an assimilating mesoscale model. Hence, the sounding strategy is geared towards allowing the model to do the best possible job in representing the atmosphere over CART sites, for example. It is not clear a priori what density of coverage or types of data are required for a good simulation. In this work, we address the problem of determining the impact of varying the density of coverage of an idea! network by purely numerical experimentation. We use one model run to provide data and another independent run to assimilate it.

111

Organizational Modes of Midlatitude Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This paper discusses common modes of mesoscale convective organization. Using 2-km national composite reflectivity data, the authors investigated linear mesoscale convective systems (MCSs) that occurred in the central United States during May ...

Matthew D. Parker; Richard H. Johnson

2000-10-01T23:59:59.000Z

112

A Composite Model of Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

A composite analysis technique is used to investigate the evolution of mesoscale features of mesoscale convective complexes (MCCs). The early stage of the MCC lifecycle is characterized by convergence, vertical motion and heating being centered ...

William R. Cotton; Ming-Sen Lin; Ray L. McAnelly; Craig J. Tremback

1989-04-01T23:59:59.000Z

113

Mesoscale Computational Materials Science - Programmaster.org  

Science Conference Proceedings (OSTI)

Jul 31, 2012 ... Symposium, Mesoscale Computational Materials Science of Energy Materials. Sponsorship ... materials for advanced batteries and fuel cells

114

Acoustic Characterization of Mesoscale Objects  

SciTech Connect

This report describes the science and engineering performed to provide state-of-the-art acoustic capabilities for nondestructively characterizing mesoscale (millimeter-sized) objects--allowing micrometer resolution over the objects entire volume. Materials and structures used in mesoscale objects necessitate the use of (1) GHz acoustic frequencies and (2) non-contacting laser generation and detection of acoustic waves. This effort demonstrated that acoustic methods at gigahertz frequencies have the necessary penetration depth and spatial resolution to effectively detect density discontinuities, gaps, and delaminations. A prototype laser-based ultrasonic system was designed and built. The system uses a micro-chip laser for excitation of broadband ultrasonic waves with frequency components reaching 1.0 GHz, and a path-stabilized Michelson interferometer for detection. The proof-of-concept for mesoscale characterization is demonstrated by imaging a micro-fabricated etched pattern in a 70 {micro}m thick silicon wafer.

Chinn, D; Huber, R; Chambers, D; Cole, G; Balogun, O; Spicer, J; Murray, T

2007-03-13T23:59:59.000Z

115

The Canadian MC2: A Semi-Lagrangian, Semi-Implicit Wideband Atmospheric Model Suited for Finescale Process Studies and Simulation  

Science Conference Proceedings (OSTI)

This paper attempts to document the developmental research and early mesoscale results of the new fully nonhydrostatic atmospheric model called MC2 (mesoscale compressible community). Its numerical scheme is the semi-implicit semi-Lagrangian ...

Robert Benoit; Michel Desgagné; Pierre Pellerin; Simon Pellerin; Yves Chartier; Serge Desjardins

1997-10-01T23:59:59.000Z

116

Coastal Atmospheric Circulation around an Idealized Cape during Wind-Driven Upwelling Studied from a Coupled Ocean–Atmosphere Model  

Science Conference Proceedings (OSTI)

The study analyzes atmospheric circulation around an idealized coastal cape during summertime upwelling-favorable wind conditions simulated by a mesoscale coupled ocean–atmosphere model. The domain resembles an eastern ocean boundary with a ...

Natalie Perlin; Eric D. Skyllingstad; Roger M. Samelson

2011-03-01T23:59:59.000Z

117

Improved Simulation of Florida Summer Convection Using the PLACE Land Model and a 1.5-Order Turbulence Parameterization Coupled to the Penn State–NCAR Mesoscale Model  

Science Conference Proceedings (OSTI)

Three major modifications to the treatment of land surface processes in the Pennsylvania State University–National Center for Atmospheric Research mesoscale model MM5, are tested in a matrix of eight model experiments. Paired together in each ...

Barry H. Lynn; David R. Stauffer; Peter J. Wetzel; Wei-Kuo Tao; Pinhas Alpert; Nataly Perlin; R. David Baker; Ricardo Muñoz; Aaron Boone; Yiqin Jia

2001-06-01T23:59:59.000Z

118

A Cumulus Parameterization Including Mass Fluxes, Convective Vertical Velocities, and Mesoscale Effects: Thermodynamic and Hydrological Aspects in a General Circulation Model  

Science Conference Proceedings (OSTI)

A cumulus parameterization based on mass fluxes, convective-scale vertical velocities, and mesoscale effects has been incorporated in an atmospheric general circulation model (GCM). Most contemporary cumulus parameterizations are based on ...

Leo J. Donner; Charles J. Seman; Richard S. Hemler; Songmiao Fan

2001-08-01T23:59:59.000Z

119

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

120

Workstation-Based Real-Time Mesoscale Modeling Designed for Weather Support to Operations at the Kennedy Space Center and Cape Canaveral Air Station  

Science Conference Proceedings (OSTI)

This paper describes the capabilities and operational utility of a version of the Mesoscale Atmospheric Simulation System (MASS) that has been developed to support operational weather forecasting at the Kennedy Space Center (KSC) and Cape ...

John Manobianco; Gregory E. Taylor; John W. Zack

1996-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Use of Four-Dimensional Data Assimilation in a Limited-Area Mesoscale Model Part II: Effects of Data Assimilation within the Planetary Boundary Layer  

Science Conference Proceedings (OSTI)

A four-dimensional data assimilation (FDDA) scheme based on Newtonian relaxation or nudging has been developed and evaluated in the Pennsylvania State University/National Center for Atmospheric Research (PSU/NCAR) Limited-Area Mesoscale Model. It ...

David R. Stauffer; Nelson L. Seaman; Francis S. Binkowski

1991-03-01T23:59:59.000Z

122

The Kinematics of a Midlatitude, Continental Mesoscale Convective System and Its Mesoscale Vortex  

Science Conference Proceedings (OSTI)

The authors present a unique, scale-discriminating study of the environment-relative circulations within a mesoscale convective system (MCS) and mesoscale convective vortex (MCV). The MCS, a leading convective line and trailing stratiform region ...

Jason C. Knievel; Richard H. Johnson

2002-07-01T23:59:59.000Z

123

Dynamics of Track Deflection Associated with the Passage of Tropical Cyclones over a Mesoscale Mountain  

Science Conference Proceedings (OSTI)

In this study, the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5) was used to simulate Supertyphoon Bilis (in 2000) and Typhoon Toraji (in 2001) in order to investigate the ...

Yuh-Lang Lin; Nicholas C. Witcraft; Ying-Hwa Kuo

2006-12-01T23:59:59.000Z

124

One-Way Coupling of an Atmospheric and a Hydrologic Model in Colorado  

Science Conference Proceedings (OSTI)

This paper examines the accuracy of high-resolution nested mesoscale model simulations of surface climate. The nesting capabilities of the atmospheric fifth-generation Pennsylvania State University (PSU)–National Center for Atmospheric Research (...

L. E. Hay; M. P. Clark; M. Pagowski; G. H. Leavesley; W. J. Gutowski Jr.

2006-08-01T23:59:59.000Z

125

Ocean Eddy Dynamics in a Coupled Ocean–Atmosphere Model  

Science Conference Proceedings (OSTI)

The role of mesoscale oceanic eddies is analyzed in a quasigeostrophic coupled ocean–atmosphere model operating at a large Reynolds number. The model dynamics are characterized by decadal variability that involves nonlinear adjustment of the ...

P. Berloff; W. Dewar; S. Kravtsov; J. McWilliams

2007-05-01T23:59:59.000Z

126

Atmospheric Moisture and Cloud Cover Characteristics Forecast by AMPS  

Science Conference Proceedings (OSTI)

Antarctic Mesoscale Prediction System (AMPS) forecasts of atmospheric moisture and cloud fraction (CF) are compared with observations at McMurdo and Amundsen–Scott South Pole station (hereafter, South Pole station) in Antarctica. Overall, it is ...

Ryan L. Fogt; David H. Bromwich

2008-10-01T23:59:59.000Z

127

Scale Invariance, Symmetries, Fractals, and Stochastic Simulations of Atmospheric Phenomena  

Science Conference Proceedings (OSTI)

Advances in remote sensing and in situ measurement techniques have revealed the full continuum of atmospheric motions and have underlined the importance of mesoscale processes. This paper examines the implications of three observed ...

S. Lovejoy; D. Schertzer

1986-01-01T23:59:59.000Z

128

Quality Assurance Procedures for Mesoscale Meteorological Data  

Science Conference Proceedings (OSTI)

Mesoscale meteorological data present their own challenges and advantages during the quality assurance (QA) process because of their variability in both space and time. To ensure data quality, it is important to perform quality control at many ...

Christopher A. Fiebrich; Cynthia R. Morgan; Alexandria G. McCombs; Peter K. Hall Jr.; Renee A. McPherson

2010-10-01T23:59:59.000Z

129

Mesoscale Wind Signatures along the Carolina Coast  

Science Conference Proceedings (OSTI)

Coastal winds immediately offshore of North and South Carolina often exhibit a mesoscale diffluent–confluent pattern that appears to be governed by the coastal configuration and oceanic thermal field. The stationary pattern roughly parallels the ...

Allen J. Riordan; Yuh-Lang Lin

1992-12-01T23:59:59.000Z

130

Mesoscale Coastal Processes during GALE IOP 2  

Science Conference Proceedings (OSTI)

During Intensive Observation Period 2 of the Genesis of Atlantic Lows Experiment, a number of mesoscale phenomena were observed with special and conventional observing systems over the land and coastal waters. This study involved analysis of ...

James D. Doyle; Thomas T. Warner

1990-02-01T23:59:59.000Z

131

Observations of a Mesoscale Ducted Gravity Wave  

Science Conference Proceedings (OSTI)

This paper reports coordinated observations of a mesoscale gravity wave made during the FRONTS 84 field experiment conducted in southwestern France in the summer of 1984. The observations were unique in the sense that all relevant wave ...

F. M. Ralph; V. Venkateswaran; M. Crochet

1993-10-01T23:59:59.000Z

132

Mesoscale Structure of an Oklahoma Squall Line  

Science Conference Proceedings (OSTI)

A squall line, which passed through the National Severe Storms Laboratory measonetwork in Oklahoma on 26 April 1969, is analyzed to determine the mesoscale structure. The analyses are based on data from 23 rawinsonde ascents, 29 automatically ...

Judith Stokes Bradberry

1981-05-01T23:59:59.000Z

133

On a Recent Parameterization of Mesoscale Eddies  

Science Conference Proceedings (OSTI)

A recent parameterization of mesoscale eddies by Gent and McWilliams (GMc) represents their effects as advective and diffusive fluxes along isopycnals. The form chosen for the added transport velocity due to eddies flattens isopycnals as in ...

Amit Tandon; Chris Garrett

1996-03-01T23:59:59.000Z

134

Mesoscale Energy Spectra of Moist Baroclinic Waves  

Science Conference Proceedings (OSTI)

The role of moist processes in the development of the mesoscale kinetic energy spectrum is investigated with numerical simulations of idealized moist baroclinic waves. Dry baroclinic waves yield upper-tropospheric kinetic energy spectra that ...

Michael L. Waite; Chris Snyder

2013-04-01T23:59:59.000Z

135

Evaluation of Snow Depth and Soil Temperatures Predicted by the Hydro–Thermodynamic Soil–Vegetation Scheme Coupled with the Fifth-Generation Pennsylvania State University–NCAR Mesoscale Model  

Science Conference Proceedings (OSTI)

The Hydro–Thermodynamic Soil–Vegetation Scheme (HTSVS) coupled in a two-way mode with the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (NCAR) Mesoscale Meteorological Model (MM5) is evaluated for a ...

Balachandrudu Narapusetty; Nicole Mölders

2005-12-01T23:59:59.000Z

136

Numerical Study of Local/Regional Atmospheric Changes Caused by a Large Solar Central Receiver Power Plant  

Science Conference Proceedings (OSTI)

A two-dimensional, vertical cross section, numerical atmospheric mesoscale model has been applied to study the potential local/regional atmospheric effects of the installation of a 100 MWe solar thermal central receiver power plant at Barstow, ...

Chandrakant M. Bhumralkar; Arthur J. Slemmons; Kenneth C. Nitz

1981-06-01T23:59:59.000Z

137

The Effect of Mesoscale Mountain over the East Indochina Peninsula on Downstream Summer Rainfall over East Asia  

Science Conference Proceedings (OSTI)

The mesoscale mountain over the east Indochina Peninsula, named Annam Cordillera, plays a key role in shaping the South China Sea (SCS) summer climate in both the atmosphere and the ocean. However, its effect is not limited to the SCS. Ensemble ...

Li Qi; Yuqing Wang

2012-07-01T23:59:59.000Z

138

Baroclinic Transition of a Long-Lived Mesoscale Convective Vortex  

Science Conference Proceedings (OSTI)

The period 5–15 June 2003, during the field phase of the Bow Echo and Mesoscale Convective Vortex (MCV) Experiment (BAMEX), was noteworthy for the wide variety of mesoscale convective systems (MCSs) that occurred. Of particular interest was a ...

Thomas J. Galarneau Jr.; Lance F. Bosart; Christopher A. Davis; Ron McTaggart-Cowan

2009-02-01T23:59:59.000Z

139

Mesoscale Variability in Denmark Strait: The PV Outflow Hypothesis  

Science Conference Proceedings (OSTI)

The outflow through Denmark Strait shows remarkable mesoscale variability characterized by the continuous formation of intense mesoscale cyclones just south of the sill. These cyclones have a diameter of about 30 km and clear signatures at the ...

Michael A. Spall; James F. Price

1998-08-01T23:59:59.000Z

140

Balanced Dynamics of Mesoscale Vortices Produced in Simulated Convective Systems  

Science Conference Proceedings (OSTI)

Long-lived, mesoscale convective systems are known to occasionally produce mesoscale convective vortices (MCVs) in the lower to middle troposphere with horizontal scales averaging 100–200 km. The formation of MCVs is investigated using fully ...

Christopher A. Davis; Morris L. Weisman

1994-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Thermodynamic Properties of Mesoscale Convective Systems Observed during BAMEX  

Science Conference Proceedings (OSTI)

Dropsonde observations from the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX) are used to document the spatiotemporal variability of temperature, moisture, and wind within mesoscale convective systems (MCSs). Onion-type sounding ...

James Correia Jr.; Raymond W. Arritt

2008-11-01T23:59:59.000Z

142

Mesoscale Meteorology and High Ozone in the Northeast United States  

Science Conference Proceedings (OSTI)

This study examines the relationship between mesoscale meteorological conditions and high-ozone days in the northeastern United States. It is proposed that the leeside trough and the sea-breeze front are two mesoscale features that can be ...

Robert S. Gaza

1998-09-01T23:59:59.000Z

143

Cloud-to-Ground Lightning Activity in Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

A study of cloud-to-ground lightning activity attending an important subclass of mesoscale convective weather systems called the mesoscale convective complex shows that groun discharge flash rates in excess of 1000 h?1 can be sustained on average ...

S. J. Goodman; D. R. MacGorman

1986-12-01T23:59:59.000Z

144

A Reanalysis System for the Generation of Mesoscale Climatographies  

Science Conference Proceedings (OSTI)

The use of a mesoscale model–based four-dimensional data assimilation (FDDA) system for generating mesoscale climatographies is demonstrated. This dynamical downscaling method utilizes the fifth-generation Pennsylvania State University–National ...

Andrea N. Hahmann; Dorita Rostkier-Edelstein; Thomas T. Warner; Francois Vandenberghe; Yubao Liu; Richard Babarsky; Scott P. Swerdlin

2010-05-01T23:59:59.000Z

145

Mesoscale Predictability of an Extreme Warm-Season Precipitation Event  

Science Conference Proceedings (OSTI)

A mesoscale model is used to investigate the mesoscale predictability of an extreme precipitation event over central Texas on 29 June 2002 that lasted through 7 July 2002. Both the intrinsic and practical aspects of warm-season predictability, ...

Fuqing Zhang; Andrew M. Odins; John W. Nielsen-Gammon

2006-04-01T23:59:59.000Z

146

A Mesoscale Modeling Study of the 1996 Saguenay Flood  

Science Conference Proceedings (OSTI)

A mesoscale simulation of the 19–21 July 1996 Saguenay flood cyclone was performed using the Canadian Mesoscale Compressible Community (MC2) model to study the processes leading to the explosive development and the large amount of precipitation. ...

J. A. Milbrandt; M. K. Yau

2001-06-01T23:59:59.000Z

147

Topographic Vorticity-Mode Mesoscale-? (TVM) Model. Part I: Formulation  

Science Conference Proceedings (OSTI)

The three-dimensional, flat-terrain, finite-difference URBMET vorticity, mode mesoscale-? model has been modified to include topographic effects. The resulting topographic vorticity-mode mesoscale-? (TVM) model is hydrostatic, Boussinesq, and ...

G. Schayes; P. Thunis; R. Bornstein

1996-10-01T23:59:59.000Z

148

The Use of Cloud-Resolving Simulations of Mesoscale Convective Systems to Build a Mesoscale Parameterization Scheme  

Science Conference Proceedings (OSTI)

A method is described for parameterizing thermodynamic forcing by the mesoscale updrafts and downdrafts of mesoscale convective systems (MCSs) in models with resolution too coarse to resolve these drafts. The parameterization contains ...

G. David Alexander; William R. Cotton

1998-06-01T23:59:59.000Z

149

Cloud-Resolving Simulations of Mesoscale Vortex Intensification and Its Effect on a Serial Mesoscale Convective System  

Science Conference Proceedings (OSTI)

The authors performed numerical simulations of the 27–28 May 1998 mesoscale convective vortex (MCV) and mesoscale convective system (MCS) to understand how the MCV modulated the convection, and how the convection intensified the vortex. The fifth-...

Christopher A. Davis; Stanley B. Trier

2002-12-01T23:59:59.000Z

150

Mesoscale morphologies in polymer thin films.  

Science Conference Proceedings (OSTI)

In the midst of an exciting era of polymer nanoscience, where the development of materials and understanding of properties at the nanoscale remain a major R&D endeavor, there are several exciting phenomena that have been reported at the mesoscale (approximately an order of magnitude larger than the nanoscale). In this review article, we focus on mesoscale morphologies in polymer thin films from the viewpoint of origination of structure formation, structure development and the interaction forces that govern these morphologies. Mesoscale morphologies, including dendrites, holes, spherulites, fractals and honeycomb structures have been observed in thin films of homopolymer, copolymer, blends and composites. Following a largely phenomenological level of description, we review the kinetic and thermodynamic aspects of mesostructure formation outlining some of the key mechanisms at play. We also discuss various strategies to direct, limit, or inhibit the appearance of mesostructures in polymer thin films as well as an outlook toward potential areas of growth in this field of research.

Ramanathan, M.; Darling, S. B. (Center for Nanoscale Materials)

2011-06-01T23:59:59.000Z

151

Mesoscale Downdraft Influences on Vertical Vorticity in a Mature Mesoscale Convective System  

Science Conference Proceedings (OSTI)

The vorticity dynamics of a lower-tropospheric mesovortex within a mature mesoscale convective system (MCS) is investigated with observations from a special sounding network and with dual-Doppler radar measurements. The data show that the ...

Edward A. Brandes; Conrad L. Ziegler

1993-05-01T23:59:59.000Z

152

Numerical Prediction of Convectively Driven Mesoscale Pressure Systems. Part II. Mesoscale Model  

Science Conference Proceedings (OSTI)

A 20-level, three-dimensional, primitive equation model with 20 km horizontal resolution is used to predict the development of convectively driven mesoscale pressure systems. Systems produced by the model have life histories and structural ...

J. M. Fritsch; C. F. Chappell

1980-08-01T23:59:59.000Z

153

Local and Mesoscale Impacts of Wind Farms as Parameterized in a Mesoscale NWP Model  

Science Conference Proceedings (OSTI)

A new wind farm parameterization has been developed for the mesoscale numerical weather prediction model, the Weather Research and Forecasting model (WRF). The effects of wind turbines are represented by imposing a momentum sink on the mean flow; ...

Anna C. Fitch; Joseph B. Olson; Julie K. Lundquist; Jimy Dudhia; Alok K. Gupta; John Michalakes; Idar Barstad

2012-09-01T23:59:59.000Z

154

Coupling between the University of California, Davis, Advanced Canopy–Atmosphere–Soil Algorithm (ACASA) and MM5: Preliminary Results for July 1998 for Western North America  

Science Conference Proceedings (OSTI)

The University of California, Davis, Advanced Canopy–Atmosphere–Soil Algorithm (ACASA) is coupled to the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (NCAR) Mesoscale Model (MM5) as a land surface ...

R. David Pyles; Bryan C. Weare; Kyaw Tha Paw U; William Gustafson

2003-05-01T23:59:59.000Z

155

Numerical Simulation of Mesoscale Eddies over Melbourne  

Science Conference Proceedings (OSTI)

A mesoscale wind field model is used to simulate a cyclonic nocturnal eddy which may form over Melbourne under stable conditions with light synoptic winds. Two types of eddy (Mel-I and Mel-II) are identified, with separate formation mechanisms. ...

John L. McGregor; Fujio Kimura

1989-01-01T23:59:59.000Z

156

Mesoscale Organization of Springtime Rainstorms in Oklahoma  

Science Conference Proceedings (OSTI)

Radar reflectivity and raingage data obtained during six springtimes indicate the types of mesoscale organization that occur in association with major rain events in Oklahoma (at least 25 mm of rain in 24 h over an area exceeding 12 500 km2). In ...

Robert A. Houze Jr.; Bradley F. Smull; Peter Dodge

1990-03-01T23:59:59.000Z

157

Diagnosing Summertime Mesoscale Vertical Motion: Implications for Atmospheric Data Assimilation  

Science Conference Proceedings (OSTI)

Balance omega equations have recently been used to try to improve the characterization of balance in variational data assimilation schemes for numerical weather prediction (NWP). Results from Fisher and Fillion et al. indicate that a ...

Christian Pagé; Luc Fillion; Peter Zwack

2007-06-01T23:59:59.000Z

158

Mesoscale coupled ocean-atmosphere feedbacks in boundary current systems  

E-Print Network (OSTI)

to about 600km offshore, beyond which wind stress curla shifted maximum wind stress offshore when compare to Fig.strengthening winds while extending offshore. A seasonal

Putrasahan, Dian Ariyani

2012-01-01T23:59:59.000Z

159

VISSR Atmospheric Sounder (VAS) Simulation Experiment for a Severe Storm Environment  

Science Conference Proceedings (OSTI)

The GOES satellites launched in the 1980's are carrying an instrument called the VISSR Atmospheric Sounder (VAS), which is designed to provide temperature and moisture profile-sounding capability for mesoscale weather systems. As a controlled ...

Dennis Chesters; Louis W. Uccellini; Anthony Mostek

1982-03-01T23:59:59.000Z

160

Modification of the Atmospheric Boundary Layer by a Small Island: Observations from Nauru  

Science Conference Proceedings (OSTI)

Nauru, a small island in the tropical Pacific, generates cloud plumes that may grow to over 100-km lengths. This study uses observations to examine the mesoscale disturbance of the marine atmospheric boundary layer by the island that produces ...

Stuart Matthews; Jörg M. Hacker; Jason Cole; Jeffrey Hare; Charles N. Long; R. Michael Reynolds

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Analysis of Near-Surface Atmospheric Variables: Validation of the SAFRAN Analysis over France  

Science Conference Proceedings (OSTI)

Système d’analyse fournissant des renseignements atmosphériques à la neige (SAFRAN) is a mesoscale atmospheric analysis system for surface variables. It produces an analysis at the hourly time step using ground data observations. One of SAFRAN’s ...

P. Quintana-Seguí; P. Le Moigne; Y. Durand; E. Martin; F. Habets; M. Baillon; C. Canellas; L. Franchisteguy; S. Morel

2008-01-01T23:59:59.000Z

162

Nesting large-eddy simulations within mesoscale simulations for wind energy applications  

DOE Green Energy (OSTI)

With increasing demand for more accurate atmospheric simulations for wind turbine micrositing, for operational wind power forecasting, and for more reliable turbine design, simulations of atmospheric flow with resolution of tens of meters or higher are required. These time-dependent large-eddy simulations (LES), which resolve individual atmospheric eddies on length scales smaller than turbine blades and account for complex terrain, are possible with a range of commercial and open-source software, including the Weather Research and Forecasting (WRF) model. In addition to 'local' sources of turbulence within an LES domain, changing weather conditions outside the domain can also affect flow, suggesting that a mesoscale model provide boundary conditions to the large-eddy simulations. Nesting a large-eddy simulation within a mesoscale model requires nuanced representations of turbulence. Our group has improved the Weather and Research Forecasting model's (WRF) LES capability by implementing the Nonlinear Backscatter and Anisotropy (NBA) subfilter stress model following Kosovic (1997) and an explicit filtering and reconstruction technique to compute the Resolvable Subfilter-Scale (RSFS) stresses (following Chow et al, 2005). We have also implemented an immersed boundary method (IBM) in WRF to accommodate complex terrain. These new models improve WRF's LES capabilities over complex terrain and in stable atmospheric conditions. We demonstrate approaches to nesting LES within a mesoscale simulation for farms of wind turbines in hilly regions. Results are sensitive to the nesting method, indicating that care must be taken to provide appropriate boundary conditions, and to allow adequate spin-up of turbulence in the LES domain.

Lundquist, J K; Mirocha, J D; Chow, F K; Kosovic, B; Lundquist, K A

2008-09-08T23:59:59.000Z

163

Mesoscale and Large-Eddy Simulations for Wind Energy  

Science Conference Proceedings (OSTI)

Operational wind power forecasting, turbine micrositing, and turbine design require high-resolution simulations of atmospheric flow over complex terrain. The use of both Reynolds-Averaged Navier Stokes (RANS) and large-eddy (LES) simulations is explored for wind energy applications using the Weather Research and Forecasting (WRF) model. To adequately resolve terrain and turbulence in the atmospheric boundary layer, grid nesting is used to refine the grid from mesoscale to finer scales. This paper examines the performance of the grid nesting configuration, turbulence closures, and resolution (up to as fine as 100 m horizontal spacing) for simulations of synoptically and locally driven wind ramping events at a West Coast North American wind farm. Interestingly, little improvement is found when using higher resolution simulations or better resolved turbulence closures in comparison to observation data available for this particular site. This is true for week-long simulations as well, where finer resolution runs show only small changes in the distribution of wind speeds or turbulence intensities. It appears that the relatively simple topography of this site is adequately resolved by all model grids (even as coarse as 2.7 km) so that all resolutions are able to model the physics at similar accuracy. The accuracy of the results is shown in this paper to be more dependent on the parameterization of the land-surface characteristics such as soil moisture rather than on grid resolution.

Marjanovic, N

2011-02-22T23:59:59.000Z

164

Nonhydrostatic icosahedral atmospheric model (NICAM) for global cloud resolving simulations  

Science Conference Proceedings (OSTI)

A new type of ultra-high resolution atmospheric global circulation model is developed. The new model is designed to perform ''cloud resolving simulations'' by directly calculating deep convection and meso-scale circulations, which play key roles not ... Keywords: Aqua-planet experiments, Atmospheric general circulation models, Cloud clusters, Cloud resolving model, Icosahedral grids, Nonhydrostatic model

M. Satoh; T. Matsuno; H. Tomita; H. Miura; T. Nasuno; S. Iga

2008-03-01T23:59:59.000Z

165

Thermal Effects of Urban Canyon Structure on the Nocturnal Heat Island: Numerical Experiment Using a Mesoscale Model Coupled with an Urban Canopy Model  

Science Conference Proceedings (OSTI)

A single-layer urban canopy model is incorporated into a simple two-dimensional atmospheric model in order to examine the individual impacts of anthropogenic heating, a large heat capacity, and a small sky-view factor on mesoscale heat island ...

Hiroyuki Kusaka; Fujio Kimura

2004-12-01T23:59:59.000Z

166

Operational Forecasting and Detection of Mesoscale Gravity Waves  

Science Conference Proceedings (OSTI)

Mesoscale gravity waves display periods of 1–4 h, have wavelengths of 50–500 km, and can have important effects upon the sensible weather. Real-time prediction, detection, and nowcasting of these mesoscale phenomena is shown to be feasible, due ...

Steven E. Koch; Christopher O’Handley

1997-06-01T23:59:59.000Z

167

Analysis of a Small, Vigorous Mesoscale Convective System in a Low-Shear Environment. Part II: Evolution of the Stratiform Precipitation and Mesoscale Flows  

Science Conference Proceedings (OSTI)

The evolution of the mesoscale flow and precipitation distribution are investigated for a small mesoscale convective system (MCS) that evolved in a nearly barotropic environment exhibiting moderate instability and weak wind shear. Observations ...

Kevin R. Knupp; Bart Geerts; John D. Tuttle

1998-07-01T23:59:59.000Z

168

Effects of Downdrafts and Mesoscale Convective Organization on the Heat and Moisture Budgets of Tropical Cloud Clusters. Part III: Effects of Mesoscale Convective Organization  

Science Conference Proceedings (OSTI)

The effects of mesoscale convective organization on the large-scale heat and moisture budgets of tropical cloud clusters are studied using the GATE Phase III data. Two basic questions concerning the mesoscale effects are addressed: 1) the ...

Ming-Dean Cheng; Michio Yanai

1989-06-01T23:59:59.000Z

169

Severe Accident Related Research and Development at Forschungszentrum Karlsruhe for Present and Future Needs  

SciTech Connect

The research and development program at the Forschungszentrum Karlsruhe, performed within the Program Nuclear Safety Research, is centered around phenomena and processes that could possibly endanger the containment integrity of a large pressurized water reactor after a severe accident. The program includes three activities.The first activity is in-vessel steam explosion. Premixing phenomena are studied in the QUEOS and PREMIX test series. The efficiency of energy conversion is the subject of ECO tests. The BERDA experimental program investigates the load capacity of a reactor pressure vessel (RPV) in steam explosion events.The second activity is hydrogen behavior and mitigation. Advanced models and numerical tools are developed to describe hydrogen sources, distribution of gases in containment, the various modes of hydrogen combustion, and corresponding structural loads.The third activity is ex-vessel melt behavior. The release behavior of melt after RPV failure is studied in DISCO and KAJET tests. In support of core catcher development, interaction with sacrificial and refractory materials, further melt spreading and cooling phenomena are investigated in KAPOOL, KATS, and COMET tests.The goal is to describe and quantify the governing mechanisms and to develop verified models and numerical tools that are able to predict maximum possible loads for severe accident scenarios on full plant scale. The work supported the development and assessment of the safety design of the French-German European Pressurized Water Reactor (EPR). It led to a broader understanding of severe accident phenomena and of controlling and mitigating measures that can also be of benefit for existing plants.

Scholtyssek, Werner; Heusener, Gerhard; Hofmann, Fritz; Plitz, Helmut [Forschungszentrum Karlsruhe GmbH (Germany)

2002-07-15T23:59:59.000Z

170

A Numerical Model for Chemical and Meteorological Processes in the Atmospheric Boundary Layer. Part I: A Model Description and a One-Dimensional Parameter Study  

Science Conference Proceedings (OSTI)

A numerical flow model is presented for the atmospheric boundary layer, including dispersion and chemical transformations of air pollutants. The model is a three-dimensional time-dependent one for the mesoscale based on the conservation equations ...

Gunilla Svensson

1996-06-01T23:59:59.000Z

171

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

172

Mesoscale Convective Complexes in the Western Pacific Region  

Science Conference Proceedings (OSTI)

A climatological study of mesoscale convective complexes (MCCs) during 1983–1985 over the western Pacific region (WPR), using full-disc, enhanced infrared satellite imagery from the Japanese Geostationary Meteorological Satellite is presented.

David Miller; J. M. Fritsch

1991-12-01T23:59:59.000Z

173

Mesoscale Convective Complexes over the Indian Monsoon Region  

Science Conference Proceedings (OSTI)

Full disk infrared satellite imagery from the Indian National Satellite System (INSAT) geostationary meteorological satellite was examined to determine if mesoscale convective complexes (MCCs) frequent the Indian subcontinent (ISC) region. Using ...

Arlenf G. Laing; J. Michael Fritsch

1993-05-01T23:59:59.000Z

174

Global Patterns of Mesoscale Eddy Properties and Diffusivities  

Science Conference Proceedings (OSTI)

Mesoscale eddies play a major role in the transport of tracers in the ocean. Focusing on a sector in the East Pacific, we present estimates of eddy diffusivities derived from kinematic tracer simulations using satellite-observed velocity fields. ...

Andreas Klocker; Ryan Abernathey

175

Numerical Experiments in Mesoscale Prediction over Southeast Australia  

Science Conference Proceedings (OSTI)

A new movable fine-mesh model (MFM) developed at the Australian Numerical Meteorology Research Centre, for mesoscale data assimilation and forecasting, is described. For the present, it is a 10-layer, hydrostatic, primitive equations model with ...

D. J. Gauntlett; L. M. Leslie; L. W. Logan

1984-06-01T23:59:59.000Z

176

Precipitation Efficiency of Warm-Season Midwestern Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The precipitation efficiencies for mesoscale convective systems (MCS) over the central United States are calculated. During July–September 2000 and June–September 2001, 24 MCS for which sufficient data were available occurred over or near ...

Patrick Market; Stacy Allen; Roderick Scofield; Robert Kuligowski; Arnold Gruber

2003-12-01T23:59:59.000Z

177

The Helsinki Testbed: A Mesoscale Measurement, Research, and Service Platform  

Science Conference Proceedings (OSTI)

The Finnish Meteorological Institute and Vaisala have established a mesoscale weather observational network in southern Finland. The Helsinki Testbed is an open research and quasi-operational program designed to provide new information on ...

Jarkko T. Koskinen; Jani Poutiainen; David M. Schultz; Sylvain Joffre; Jarmo Koistinen; Elena Saltikoff; Erik Gregow; Heikki Turtiainen; Walter F. Dabberdt; Juhani Damski; Noora Eresmaa; Sabine Göke; Otto Hyvärinen; Leena Järvi; Ari Karppinen; Janne Kotro; Timo Kuitunen; Jaakko Kukkonen; Markku Kulmala; Dmitri Moisseev; Pertti Nurmi; Heikki Pohjola; Pirkko Pylkkö; Timo Vesala; Yrjö Viisanen

2011-03-01T23:59:59.000Z

178

Mesoscale Vortices in the Weddell Sea Region (Antarctica)  

Science Conference Proceedings (OSTI)

Preliminary results of investigations of Antarctic mesocyclones in the Weddell Sea region are presented for the Antarctic summer periods 1983–88. Based on NOAA and METEOR satellite images, a total of 195 mesoscale vortices (scale less than 1000 ...

Günther Heinemann

1990-03-01T23:59:59.000Z

179

Mesoscale Convective Complexes over the United States during 1982  

Science Conference Proceedings (OSTI)

An important class of convective weather system, the mesoscale convective complex (MCC), presents many challenges and problems to both the research and operational communities. In addition, thew very large and long-lived thunderstorm systems have ...

D. M. Rodgers; K. W. Howard; E. C. Johnston

1983-12-01T23:59:59.000Z

180

Mesoscale Vortices over the Great Lakes in Wintertime  

Science Conference Proceedings (OSTI)

The occasional occurrence of wintertime mesoscale lake vortices is documented. The vortices are readily discernible in satellite imagery, in which they take one of three forms: a miniature comma cloud, a swirl of cloud bands (resembling a ...

Gregory S. Forbes; Jonathan H. Merritt

1984-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Gridpoint Predictions of High Temperature from a Mesoscale Model  

Science Conference Proceedings (OSTI)

Mesoscale model gridpoint temperature data from simulations in the southwestern United States during the summer of 1990 are compared with both observations and statistical guidance from large-scale models over a 32-day period. Although the raw ...

David J. Stensrud; Jon A. Skindlov

1996-03-01T23:59:59.000Z

182

A Nonhydrostatic Mesoscale Model Designed to Simulate Scale Interaction  

Science Conference Proceedings (OSTI)

A three-dimensional nonhydrostatic mesoscale model is presented that is designed to optimally represent the scale-interaction process among inertially balanced and unbalanced modes occurring within convective weather systems. Because scale-...

Gregory J. Tripoli

1992-07-01T23:59:59.000Z

183

Mesoscale Moisture Initialization for Monsoon and Hurricane Forecasts  

Science Conference Proceedings (OSTI)

This paper addresses physical initialization of precipitation rates for a mesoscale numerical weather prediction model. This entails a slight modification of the vertical profile of the humidity variable that provides a close match between the ...

T. N. Krishnamurti; S. Pattnaik; D. V. Bhaskar Rao

2007-07-01T23:59:59.000Z

184

Toward a Mesoscale Observation Network in Southeast Asia  

Science Conference Proceedings (OSTI)

The current weather observation network in Southeast Asia is unable to support the accurate monitoring and prediction of the region's predominantly convective weather. Establishing a multisensor mesoscale observation network comprising automated ...

Tieh-Yong Koh; Chee-Kiat Teo

2009-04-01T23:59:59.000Z

185

Observational Analysis of the Predictability of Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Mesoscale convective systems (MCSs) have a large influence on the weather over the central United States during the warm season by generating essential rainfall and severe weather. To gain insight into the predictability of these systems, the ...

Israel L. Jirak; William R. Cotton

2007-08-01T23:59:59.000Z

186

Mesoscale Convective Complexes over the United States during 1983  

Science Conference Proceedings (OSTI)

Enhanced infrared satellite imagery is used to document the occurrence of mesoscale convective complexes over the United States during 1983. Thirty large convective systems are identified that display satellite-observable characteristics which ...

D. M. Rodgers; M. J. Magnano; J. H. Arns

1985-05-01T23:59:59.000Z

187

An Observational Analysis of a Developing Mesoscale Convective Complex  

Science Conference Proceedings (OSTI)

Dual-Doppler radar, surface mesonet, satellite, and upper-air sounding data from the 1985 Preliminary Regional Experiment for STORM-Central field experiment are used to analyze the early growth stages of a mesoscale convective complex (MCC) that ...

Jason E. Nachamkin; Ray L. McAnelly; William R. Cotton

1994-06-01T23:59:59.000Z

188

Structures and Dynamics of Quasi-2D Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Recently, three distinct archetypes for midlatitude linear mesoscale convective systems (MCSs) have been identified. This article focuses on the fundamentals of two of these archetypes: convective lines with trailing stratiform (TS) precipitation ...

Matthew D. Parker; Richard H. Johnson

2004-03-01T23:59:59.000Z

189

Positive Cloud-to-Ground Lightning in Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

We have examined the characteristics of positive cloud-to-ground lightning flashes in Mesoscale Convective Systems observed during the Oklahoma-Kansas PRE-STORM project in 1985. Lightning frequencies and patterns of ground strike locations are ...

Steven A. Rutledge; Chungu Lu; Donald R. MacGorman

1990-09-01T23:59:59.000Z

190

A Lightning Data Assimilation Technique for Mesoscale Forecast Models  

Science Conference Proceedings (OSTI)

Lightning observations have been assimilated into a mesoscale model for improvement of forecast initial conditions. Data are used from the National Lightning Detection Network (cloud-to-ground lightning detection) and a Lightning Mapping Array (...

Edward R. Mansell; Conrad L. Ziegler; Donald R. MacGorman

2007-05-01T23:59:59.000Z

191

Mesoscale Snowfall Prediction and Verification in Mountainous Terrain  

Science Conference Proceedings (OSTI)

Short-term forecasting of precipitation often relies on meteorological radar coverage to provide information on the intensity, extent, and motion of approaching mesoscale features. However, in significant portions of mountainous regions, radar ...

Melanie Wetzel; Michael Meyers; Randolph Borys; Ray McAnelly; William Cotton; Andrew Rossi; Paul Frisbie; David Nadler; Douglas Lowenthal; Stephen Cohn; William Brown

2004-10-01T23:59:59.000Z

192

A Theory for Long-Lived Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

It is proposed that certain long-lived mesoscale convective systems maintain themselves through an interaction between quasi-balanced vertical motions and the diabatic effects of moist convection. Latent heat release, evaporation and melting of ...

D. J. Raymond; H. Jiang

1990-12-01T23:59:59.000Z

193

PROBCAST: A Web-Based Portal to Mesoscale Probabilistic Forecasts  

Science Conference Proceedings (OSTI)

This paper describes the University of Washington Probability Forecast (PROBCAST), a Web-based portal to probabilistic weather predictions over the Pacific Northwest. PROBCAST products are derived from the output of a mesoscale ensemble system ...

Clifford Mass; Jeff Baars; Susan Joslyn; John Pyle; Patrick Tewson; David Jones; Tilmann Gneiting; Adrian Raftery; J. M. Sloughter; Chris Fraley

2009-07-01T23:59:59.000Z

194

Mesoscale Structures of Vortices in Polar Air Streams  

Science Conference Proceedings (OSTI)

Three vortices in a polar air stream are analyzed using detailed mesoscale observations and conventional synoptic data. In their mature stages, the vortices exhibited wind, temperature and precipitation patterns similar to the larger ...

John D. Locatelli; Peter V. Hobbs; J. Anthony Werth

1982-10-01T23:59:59.000Z

195

Coupling between Gravity Waves and Tropical Convection at Mesoscales  

Science Conference Proceedings (OSTI)

An idealized cloud-system-resolving model simulation is used to examine the coupling between a tropical cloud population and the mesoscale gravity waves that it generates. Spectral analyses of the cloud and gravity wave fields identify a clear ...

Todd P. Lane; Fuqing Zhang

2011-11-01T23:59:59.000Z

196

Organizational Modes of Mesoscale Convective Systems over Central East China  

Science Conference Proceedings (OSTI)

Composite reflectivity Doppler radar data from June to September of 2007--2010 were used to classify mesoscale convective systems (MCSs) over Central East China into seven morphologies. The morphologies included one nonlinear mode (NL) and six ...

Linlin Zheng; Jianhua Sun; Xiaoling Zhang; Changhai Liu

197

Diagnosing Mesoscale Vertical Motion from Horizontal Velocity and Density Data  

Science Conference Proceedings (OSTI)

The mesoscale vertical velocity is obtained by solving a generalized omega equation (? equation) using density and horizontal velocity data from three consecutive quasi-synoptic high-resolution surveys in the Alboran Sea. The Atlantic Jet (AJ) ...

Enric Pallàs Sanz; Álvaro Viúdez

2005-10-01T23:59:59.000Z

198

Temperature and Humidity Profiles in Mesoscale Unsaturated Downdrafts  

Science Conference Proceedings (OSTI)

Profiles of temperature and humidity beneath precipitating anvil clouds in tropical convective systems suggest the presence of a mesoscale unsaturated downdraft there. In this paper, a one-dimensional, steady-state, hydrostatic model of a ...

Colleen A. Leary

1980-05-01T23:59:59.000Z

199

Surface Boundary Conditions for Mesoscale Regional Climate Models  

Science Conference Proceedings (OSTI)

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

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

2005-10-01T23:59:59.000Z

200

An Experiment in Mesoscale Weather Forecasting in the Michigan Area  

Science Conference Proceedings (OSTI)

During an experiment in mesoscale weather forecasting in the Michigan area, consensus improved over NWS guidance in maximum/minimum temperature and probability of precipitation forecasts out to 24 hours. Forecasts were generally best in the ...

Dennis G. Baker

1986-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Case Study of an Orographically Induced Mesoscale Vortex (Denver Cyclone)  

Science Conference Proceedings (OSTI)

Observations taken during the Convection Initiation and Downburst Experiment (CINDE) are used to describe the formation and structure of an orographically induced mesoscale vortex that frequently occurs in northeastern Colorado. This vortex, ...

J. M. Wilczak; T. W. Christian

1990-05-01T23:59:59.000Z

202

Mesoscale Convergence Zone Development in Northeastern Colorado under Southwest Flow  

Science Conference Proceedings (OSTI)

In July 1987 during the CINDE project, three similar mesoscale planetary boundary layer convergence zones were observed to form in northeastern Colorado near Denver under synoptic-scale southwesterly flow. A number of recent studies have ...

Wendy Schreiber-Abshire; Alfred R. Rodi

1991-12-01T23:59:59.000Z

203

The Australian Summertime Cool Change. Part II: Mesoscale Aspects  

Science Conference Proceedings (OSTI)

Observations of four cold-frontal systems traversing the coastal region of southeast Australia in late spring and early summer are described in terms of process occurring on the mesoscale. A conceptual model is presented which summarizes the main ...

J. R. Garratt; W. L. Physick; R. K. Smith; A. J. Troup

1985-02-01T23:59:59.000Z

204

Idealized Mesoscale Convective System Structure and Propagation Using Convective Parameterization  

Science Conference Proceedings (OSTI)

The development and propagation of mesoscale convective systems (MCSs) was examined within the Weather Research and Forecasting (WRF) model using the Kain–Fritsch (KF) cumulus parameterization scheme and a modified version of this scheme. ...

James Correia Jr.; Raymond W. Arritt; Christopher J. Anderson

2008-07-01T23:59:59.000Z

205

Life Cycle and Mesoscale Frontal Structure of an Intermountain Cyclone  

Science Conference Proceedings (OSTI)

High-resolution analyses and MesoWest surface observations are used to examine the life cycle and mesoscale frontal structure of the “Tax Day Storm,” an intermountain cyclone that produced the second lowest sea level pressure observed in Utah ...

Gregory L. West; W. James Steenburgh

2010-07-01T23:59:59.000Z

206

Satellite and Radar Survey of Mesoscale Convective System Development  

Science Conference Proceedings (OSTI)

An investigation of several hundred mesoscale convective systems (MCSs) during the warm seasons (April–August) of 1996–98 is presented. Circular and elongated MCSs on both the large and small scales were classified and analyzed in this study ...

Israel L. Jirak; William R. Cotton; Ray L. McAnelly

2003-10-01T23:59:59.000Z

207

A Mesoscale Data Analysis and Downscaling Method over Complex Terrain  

Science Conference Proceedings (OSTI)

A mesoscale data analysis method for meteorological station reports is presented. Irregularly distributed measured values are combined with measurement-independent a priori information about the modification of analysis fields due to topographic ...

Reinhold Steinacker; Matthias Ratheiser; Benedikt Bica; Barbara Chimani; Manfred Dorninger; Wolfgang Gepp; Christoph Lotteraner; Stefan Schneider; Simon Tschannett

2006-10-01T23:59:59.000Z

208

The Taiwan Area Mesoscale Experiment (TAMEX): An Overview  

Science Conference Proceedings (OSTI)

The Taiwan Area Mesoscale Experiment (TAMEX) is a research program conducted jointly by scientists of Taiwan, the Republic of China, and the United States to improve, through better understanding, the forecasting of heavy precipitation events ...

Ying-Hwa Kuo; George Tai-Jen Chen

1990-04-01T23:59:59.000Z

209

Mesoscale Moisture Analysis of the North American Monsoon  

Science Conference Proceedings (OSTI)

The regional circulations that contribute moisture to the large precipitation over northwestern Mexico, the core region of the North American monsoon, are investigated using three summer seasons (July–September 1995–97) of Eta Model mesoscale ...

Ernesto Hugo Berbery

2001-01-01T23:59:59.000Z

210

Global Variability of the Wavenumber Spectrum of Oceanic Mesoscale Turbulence  

Science Conference Proceedings (OSTI)

The wavenumber spectra of sea surface height from satellite altimeter observations have revealed complex spatial variability that cannot be explained by a universal theory of mesoscale turbulence. Near the edge of the core regions of high eddy ...

Yongsheng Xu; Lee-Lueng Fu

2011-04-01T23:59:59.000Z

211

Gravity Waves Driven by Diurnal Fluctuations in Mesoscale Heating  

Science Conference Proceedings (OSTI)

Observed convective systems, such as mesoscale convective complexes (MCCs), often undergo repeated cycles of nocturnal growth and daytime decay especially during the summer. The gravity wave response to these pulsations is poorly understood. The ...

John H. E. Clark

1999-03-01T23:59:59.000Z

212

Forecasting the Maintenance of Quasi-Linear Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The problem of forecasting the maintenance of mesoscale convective systems (MCSs) is investigated through an examination of observed proximity soundings. Furthermore, environmental variables that are statistically different between mature and ...

Michael C. Coniglio; Harold E. Brooks; Steven J. Weiss; Stephen F. Corfidi

2007-06-01T23:59:59.000Z

213

Mesoscale Circulation Growth under Conditions of Weak Inertial Instability  

Science Conference Proceedings (OSTI)

The hypothesis that inertial instability plays a role in the upscale development of mesoscale convective systems (MCSs) is explored by sampling environments that supported the growth of MCSs in the Preliminary Regional Experiment for STORM (...

David O. Blanchard; William R. Cotton; John M. Brown

1998-01-01T23:59:59.000Z

214

Mesoscale Phase Distribution in Li-ion Battery Electrode Materials...  

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

of Science SSRL Phone List People Search Maps Mesoscale Phase Distribution in Li-ion Battery Electrode Materials Friday, May 31, 2013 Li-ion batteries are regarded as key devices...

215

Circulations between Mesoscale Convective Systems along a Cold Front  

Science Conference Proceedings (OSTI)

A frontal squall line that passed over the central United States on 14–15 June 1985 consisted of several primary mesoscale convective systems (MCSs) with a prominent gap (several hundred kilometers wide) between two of them over central Kansas ...

Richard H. Johnson; Barbara D. Miner; Paul E. Ciesielski

1995-03-01T23:59:59.000Z

216

Mesoscale Mapping Capabilities of Multiple-Satellite Altimeter Missions  

Science Conference Proceedings (OSTI)

The purpose of this paper is to quantify the contribution of merging multiple-satellite altimeter missions to the mesoscale mapping of sea level anomaly (H), and zonal (U) and meridional (V) geostrophic velocities. A space/time suboptimal ...

P. Y. Le Traon; G. Dibarboure

1999-09-01T23:59:59.000Z

217

Organizational Modes of Mesoscale Convective Systems over Central East China  

Science Conference Proceedings (OSTI)

Composite reflectivity Doppler radar data from June to September of 2007–2010 were used to classify mesoscale convective systems (MCSs) over central east China into seven morphologies. The morphologies included one nonlinear mode (NL) and six ...

Linlin Zheng; Jianhua Sun; Xiaoling Zhang; Changhai Liu

2013-10-01T23:59:59.000Z

218

On spectral analysis of mesoscale eddies. Part I: Linear analysis  

Science Conference Proceedings (OSTI)

This study aims to understand the ocean circulation, which is characterized by the presence of multiple alternating zonal jets and transient mesoscale eddies, by systematic analysis of the underlying linear dynamics of this system. For this ...

P. Berloff; I. Kamenkovich

219

Aircraft Investigation of Mesoscale Cellular Convection During AMTEX 75  

Science Conference Proceedings (OSTI)

The 1 s data set collected by the NCAR Electra research aircraft in the presence of closed mesoscale cellular convection (MCC) has been examined for the purpose of determining the convective wind field and horizontal profiles of temperature and ...

Jeffry Rothermel; Ernest M. Agee

1980-05-01T23:59:59.000Z

220

Synoptic Control of Mesoscale Precipitating Systems in the Pacific Northwest  

Science Conference Proceedings (OSTI)

This research examines whether an adequate representation of flow features on the synoptic scale allows for the skillful inference of mesoscale precipitating systems. The focus is on the specific problem of landfalling systems on the west coast ...

Paul J. Roebber; Kyle L. Swanson; Jugal K. Ghorai

2008-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Meso-?-scale Pressure Dips Associated with Typhoons  

Science Conference Proceedings (OSTI)

Using a mesoscale model, the formation process of a pressure dip, which was characterized by a rapid decrease and subsequent increase in surface pressure lasting less than an hour, was investigated. A simulated pressure dip accompanied by Typhoon ...

Hironori Fudeyasu; Satoshi Iizuka; Taiichi Hayashi

2007-04-01T23:59:59.000Z

222

Mesoscale Eddy Energy Locality in an Idealized Ocean Model  

Science Conference Proceedings (OSTI)

This paper investigates the energy budget of mesoscale eddies in wind-driven two-layer quasigeostrophic simulations. Intuitively, eddy energy can be generated, dissipated, and fluxed from place to place; regions where the budget balances ...

Ian Grooms; Louis-Philippe Nadeau; K. Shafer Smith

2013-09-01T23:59:59.000Z

223

The Contribution of Mesoscale Convective Weather Systems to the Warm-Season Precipitation in the United States  

Science Conference Proceedings (OSTI)

The contribution of precipitation from mesoscale convective weather systems to the warm-season (April–September) rainfall in the United States is evaluated. Both Mesoscale Convective Complexes (MCC's) and other large, long-lived mesoscale ...

J. M. Fritsch; R. J. Kane; C. R. Chelius

1986-10-01T23:59:59.000Z

224

Technical Sessions Parameterization of Convective Clouds, Mesoscale...  

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

and Convective-Generated Clouds W. R. Cotton Department of Atmospheric Science Colorado State University Fort Collins, CO 80523 This presentation is a summary of research...

225

Nonclassical Mesoscale Circulations Caused by Surface Sensible Heat-Flux Gradients  

Science Conference Proceedings (OSTI)

Significant spatial heterogeneities of daytime surface sensible heat flux are common over land within mesoscale domains. Thermally induced circulations, similar to the sea/lake breeze [termed nonclassical mesoscale circulations (NCMSs)], are ...

M. Segal; R. W. Arritt

1992-10-01T23:59:59.000Z

226

Sources of Mesoscale Variability of Gravity Waves. Part I: Topographic Excitation  

Science Conference Proceedings (OSTI)

Aircraft measurements of winds and temperatures collected during the GASP program are used to study the effects of topography as a source of mesoscale variability. Variances of fluctuations at the mesoscale over rough terrain are enhanced up to ...

Gregory D. Nastrom; David C. Fritts

1992-01-01T23:59:59.000Z

227

Mesoscale Convective Vortices Observed during BAMEX. Part II: Influences on Secondary Deep Convection  

Science Conference Proceedings (OSTI)

Observations from the Bow Echo and Mesoscale Convective Vortex (MCV) Experiment are used to examine the role of the five mesoscale convective vortices described in Part I on heavy precipitation during the daytime heating cycle. Persistent ...

Stanley B. Trier; Christopher A. Davis

2007-06-01T23:59:59.000Z

228

A Forecast Strategy for Anticipating Cold Season Mesoscale Band Formation within Eastern U.S. Cyclones  

Science Conference Proceedings (OSTI)

An ingredients-based, time- and scale-dependent forecast strategy for anticipating cold season mesoscale band formation within eastern U.S. cyclones is presented. This strategy draws on emerging conceptual models of mesoscale band development, ...

David R. Novak; Jeff S. Waldstreicher; Daniel Keyser; Lance F. Bosart

2006-02-01T23:59:59.000Z

229

Sensitivity of Mesoscale Gravity Waves to the Baroclinicity of Jet-Front Systems  

Science Conference Proceedings (OSTI)

This study investigates the sensitivity of mesoscale gravity waves to the baroclinicity of the background jet-front systems by simulating different life cycles of baroclinic waves with a high-resolution mesoscale model. Four simulations are made ...

Shuguang Wang; Fuqing Zhang

2007-02-01T23:59:59.000Z

230

Structure of a Midtropospheric Vortex Induced by a Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 9 June 1988 a mesoscale (200-km diameter) convectively generated vortex (MCV) passed through the Colorado wind-profiling network. The generating convective system, which was too small to meet Maddox’s mesoscale convective complex criteria, ...

Diana L. Bartels; John M. Brown; Edward I. Tollerud

1997-02-01T23:59:59.000Z

231

An Intercomparison of Simulated Rainfall and Evapotranspiration Associated with a Mesoscale Convective System over West Africa  

Science Conference Proceedings (OSTI)

An evaluation of precipitation and evapotranspiration simulated by mesoscale models is carried out within the African Monsoon Multidisciplinary Analysis (AMMA) program. Six models performed simulations of a mesoscale convective system (MCS) ...

Françoise Guichard; Nicole Asencio; Christophe Peugeot; Olivier Bock; Jean-Luc Redelsperger; Xuefeng Cui; Matthew Garvert; Benjamin Lamptey; Emiliano Orlandi; Julia Sander; Federico Fierli; Miguel Angel Gaertner; Sarah C. Jones; Jean-Philippe Lafore; Andrew Morse; Mathieu Nuret; Aaron Boone; Gianpaolo Balsamo; Patricia de Rosnay; Bertrand Decharme; Philip P. Harris; J.-C. Bergès

2010-02-01T23:59:59.000Z

232

Ability of a Regional-Scale Model to Predict the Genesis of Intense Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This paper presents the mesoscale part of a two-part evaluation of thirty forecasts produced by a mesoscalenumerical weather prediction model (MASS 2.0). The general approach taken to evaluate the mesoscale predictivecapabilities of the model is ...

Steven E. Koch

1985-10-01T23:59:59.000Z

233

A Mesoscale Vortex Couplet Observed in the Trailing Anvil of a Multicellular Convective Complex  

Science Conference Proceedings (OSTI)

Observations collected during the Oklahoma–Kansas PRE-STORM experiment are used to document the evolution and structure of a mesoscale vortex couplet that developed in the mesoscale convective system that occurred on 16–17 June 1985. The ...

Johannes Verlinde; William R. Cotton

1990-05-01T23:59:59.000Z

234

Numerical Model Simulations of a Mesoscale Gravity Wave Event: Sensitivity Tests and Spectral Analyses  

Science Conference Proceedings (OSTI)

This study presents numerical model experiments and spectral investigations involving a mesoscale gravity wave event. Its purposes are to determine the sensitivity of mesoscale gravity wave simulation to model configuration and physics and to ...

Jordan G. Powers

1997-08-01T23:59:59.000Z

235

Synthetic Aperture Radar as a Tool for Investigating Polar Mesoscale Cyclones  

Science Conference Proceedings (OSTI)

Polar mesoscale cyclones are intense vortices that form in cold, marine air masses poleward of major jet streams and frontal zones. Synthetic aperture radar (SAR) should be considered as a potential tool for the study of polar mesoscale cyclones ...

Todd D. Sikora; Karen S. Friedman; William G. Pichel; Pablo Clemente-Colón

2000-12-01T23:59:59.000Z

236

Recipes for Correcting the Impact of Effective Mesoscale Resolution on the Estimation of Extreme Winds  

Science Conference Proceedings (OSTI)

Extreme winds derived from simulations using mesoscale models are underestimated because of the effective spatial and temporal resolutions. This is reflected in the spectral domain as an energy deficit in the mesoscale range. The energy deficit ...

Xiaoli Guo Larsén; Søren Ott; Jake Badger; Andrea N. Hahmann; Jakob Mann

2012-03-01T23:59:59.000Z

237

QNH: Mesoscale Bounded Derivative Initialization and Winter Storm Test over Complex Terrain  

Science Conference Proceedings (OSTI)

Mesoscale bounded derivative initialization (BDI) is utilized to derive dynamical constraints, from which elliptic equations are formulated to derive smooth initial fields over complex terrain for mesoscale models. The initialization is ...

J. L. Lee; A. E. MacDonald

2000-04-01T23:59:59.000Z

238

Mesoscale Forecasts Generated from Operational Numerical Weather-Prediction Model Output  

Science Conference Proceedings (OSTI)

A technique called Model Output Enhancement (MOE) has been developed for the generation and display of mesoscale weather forecasts. The MOE technique derives mesoscale or high-resolution (order of 1 km) weather forecasts from synoptic-scale ...

John G. W. Kelley; Joseph M. Russo; Toby N. Carlson; J. Ronald Eyton

1988-01-01T23:59:59.000Z

239

Inclusion of Mesoscale Updrafts and Downdrafts in Computations of Vertical Fluxes by Ensembles of Tropical Clouds  

Science Conference Proceedings (OSTI)

Ensembles of convective clouds, especially in the tropics, often have widespread precipitating anvils associated with their deeper convective clouds. Mesoscale downdrafts occur below the middle-level bases of the anvils, and mesoscale updrafts ...

Robert A. Houze Jr.; Chee-Pong Cheng

1981-08-01T23:59:59.000Z

240

Practical and Intrinsic Predictability of Severe and Convective Weather at the Mesoscales  

Science Conference Proceedings (OSTI)

This study explores both the practical and intrinsic predictability of severe convective weather at the mesoscales using convection-permitting ensemble simulations of a squall line and bow echo event during the Bow Echo and Mesoscale Convective ...

Christopher Melhauser; Fuqing Zhang

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Mesoscale Analysis of Heavy Rainfall Episodes from SoWMEX/TiMREX  

Science Conference Proceedings (OSTI)

The authors analyze the mesoscale structure accompanying two multiday periods of heavy rainfall during the Southwest Monsoon Experiment and the Terrain-Induced Mesoscale Rainfall Experiment conducted over and near Taiwan during May and June 2008. ...

Christopher A. Davis; Wen-Chau Lee

2012-02-01T23:59:59.000Z

242

The Relationship between EMEX Mesoscale Precipitation Feature Properties and Their Environmental Characteristics  

Science Conference Proceedings (OSTI)

Characteristics of the prestorm environment of Equatorial Mesoscale Experiment (EMEX) mesoscale precipitation features (MPFs) are related to properties of them systems using regression analysis. Although environmental thermodynamic parameters are ...

G. David Alexander; George S. Young

1992-04-01T23:59:59.000Z

243

Formation of Mesoscale Lines of Precipitation: Nonsevere Squall Lines in Oklahoma during the Spring  

Science Conference Proceedings (OSTI)

The development of mesoscale lines of nonsevere convection in Oklahoma during the spring is discussed. This documentation complements the study by Bluestein and Jain of severe, mesoscale convective-fine development. Three major classes of squall ...

Howard B. Bluestein; Gregory T. Marx; Michael H. Jain

1987-11-01T23:59:59.000Z

244

Hydrostatic Adjustment in Nonhydrostatic, Compressible Mesoscale Models  

Science Conference Proceedings (OSTI)

The ability of various numerical techniques used in compressible, nonhydrostatic models to handlehydrostatic adjustment is intercompared. The exact solution of a linearized model of an isothermal, compressible, nonrotating atmosphere is compared ...

Dean G. Duffy

1997-12-01T23:59:59.000Z

245

Parameterizing Mesoscale Wind Uncertainty for Dispersion Modeling  

Science Conference Proceedings (OSTI)

A parameterization of numerical weather prediction uncertainty is presented for use by atmospheric transport and dispersion models. The theoretical development applies Taylor dispersion concepts to diagnose dispersion metrics from numerical wind ...

Leonard J. Peltier; Sue Ellen Haupt; John C. Wyngaard; David R. Stauffer; Aijun Deng; Jared A. Lee; Kerrie J. Long; Andrew J. Annunzio

2010-08-01T23:59:59.000Z

246

Coupled Mesoscale-Large-Eddy Modeling of Realistic Stable Boundary Layer Turbulence  

E-Print Network (OSTI)

Site-specific flow and turbulence information are needed for various practical applications, ranging from aerodynamic/aeroelastic modeling for wind turbine design to optical diffraction calculations. Even though highly desirable, collecting on-site meteorological measurements can be an expensive, time-consuming, and sometimes a challenging task. In this work, we propose a coupled mesoscale-large-eddy modeling framework to synthetically generate site-specific flow and turbulence data. The workhorses behind our framework are a state-of-the-art, open-source atmospheric model called the Weather Research and Forecasting (WRF) model and a tuning-free large-eddy simulation (LES) model. Using this coupled framework, we simulate a nighttime stable boundary layer (SBL) case from the well-known CASES-99 field campaign. One of the unique aspects of this work is the usage of a diverse range of observations for characterization and validation. The coupled models reproduce certain characteristics of observed low-level jets....

Wang, Yao; Manuel, Lance

2013-01-01T23:59:59.000Z

247

ARM - Publications: Science Team Meeting Documents: Evaluation of mesoscale  

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

Evaluation of mesoscale model cloud simulations of the March 2000 IOP Evaluation of mesoscale model cloud simulations of the March 2000 IOP Tselioudis, George NASA/Goddard Institute for Space Studies A suite of mesoscale models was used to produce month-long runs of the March 2000 SGP IOP. The model cloud fields were evaluated against satellite and in-situ observations, using both monthly statistics of cloud properties and instantaneous cloud property distributions. It was found that compared to satellite retrievals models tend to overestimate cloud optical thickness in all dynamic regimes. The reasons for the differences in satellite and model cloud fields were investigated. Preliminary results indicate that the large model optical depths may be caused by an overestimate of cloud ice water amounts in the model simulations. Part of the differences, however,

248

Silicon Micromachined Dimensional Calibration Artifact for Mesoscale Measurement Machines  

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

Silicon Micromachined Dimensional Calibration Silicon Micromachined Dimensional Calibration Artifact for Mesoscale Measurement Machines 1 Silicon Micromachined Dimensional Calibration Artifact for Mesoscale Measurement Machines 2 Sandia National Laboratories PO Box 5800 Albuquerque, NM 87185 USA Hy D. Tran, PhD, PE Phone: (505)844-5417 Fax: (505)844-4372 hdtran@sandia.gov AFFIRMATION: I affirm that all information submitted as a part of, or supplemental to, this entry is a fair and accurate representation of this product. ___________________________________ Hy D. Tran Not a joint entry. Silicon Micromachined Dimensional Calibration Artifact for Mesoscale Measurement Machines The silicon hybrid artifact is an anisotropic-etched silicon standard that is used as a calibration reference artifact to calibrate vision-based and

249

Atmospheric Aerosols  

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

measuring equipment Atmospheric Aerosols Atmospheric aerosol research at Berkeley Lab seeks to understand the air quality and climate impacts of particles in the atmosphere. On...

250

Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly  

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

Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Reflective Greenhouses in SE Spain Title Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Reflective Greenhouses in SE Spain Publication Type Journal Article Year of Publication 2013 Authors Campra, Pablo, and Dev Millstein Journal Environmental Science & Technology Volume 47 Issue 21 Pagination 12284 - 12290 Date Published 11/2013 ISSN 0013-936X Keywords buildings, Heat Island Group Abstract A long-term local cooling trend in surface air temperature has been monitored at the largest concentration of reflective greenhouses in the world, at the Province of Almeria, SE Spain, associated with a dramatic increase in surface albedo in the area. The availability of reliable long-term climatic field data at this site offers a unique opportunity to test the skill of mesoscale meteorological models describing and predicting the impacts of land use change on local climate. Using the Weather Research and Forecast (WRF) mesoscale model, we have run a sensitivity experiment to simulate the impact of the observed surface albedo change on monthly and annual surface air temperatures. The model output showed a mean annual cooling of 0.25 °C associated with a 0.09 albedo increase, and a reduction of 22.8 W m-2 of net incoming solar radiation at surface. Mean reduction of summer daily maximum temperatures was 0.49 °C, with the largest single-day decrease equal to 1.3 °C. WRF output was evaluated and compared with observations. A mean annual warm bias (MBE) of 0.42 °C was estimated. High correlation coefficients (R2 > 0.9) were found between modeled and observed values. This study has particular interest in the assessment of the potential for urban temperature cooling by cool roofs deployment projects, as well as in the evaluation of mesoscale climatic models performance.

251

Examination of the Impact of a Coupled Atmospheric and Ocean Wave System. Part II: Ocean Wave Aspects  

Science Conference Proceedings (OSTI)

A coupled atmospheric and ocean wave system has been developed to study the impact of changes of surface roughness length induced by ocean waves. A two-way coupling between a mesoscale atmospheric model, MC2, and an oceanic wave model, a regional ...

R. Lalbeharry; J. Mailhot; S. Desjardins; L. Wilson

2000-02-01T23:59:59.000Z

252

Multiscale Evolution of a Derecho-Producing Mesoscale Convective System  

Science Conference Proceedings (OSTI)

In this paper the authors address one type of severe weather: strong straight-line winds. The case of a mesoscale convective system that developed in eastern Colorado on 12–13 May 1985 was studied. The system formed in the afternoon, was active ...

Lígia R. Bernardet; William R. Cotton

1998-11-01T23:59:59.000Z

253

Aspects of Effective Mesoscale, Short-Range Ensemble Forecasting  

Science Conference Proceedings (OSTI)

This study developed and evaluated a short-range ensemble forecasting (SREF) system with the goal of producing useful, mesoscale forecast probability (FP). Real-time, 0–48-h SREF predictions were produced and analyzed for 129 cases over the ...

F. Anthony Eckel; Clifford F. Mass

2005-06-01T23:59:59.000Z

254

WIND ATLAS FOR EGYPT: MEASUREMENTS, MICRO-AND MESOSCALE MODELLING  

E-Print Network (OSTI)

WIND ATLAS FOR EGYPT: MEASUREMENTS, MICRO- AND MESOSCALE MODELLING Niels G. Mortensen1 , Jens Enevoldsen Wind Energy Department, Risø National Laboratory, Roskilde, Denmark Laila Georgy Youssef, Usama Said Said, Ashour Abd El-Salam Moussa, Mohammad Akmal Mahmoud Wind Energy Department, New and Renewable

255

Wind resource assessment with a mesoscale non-hydrostatic model  

E-Print Network (OSTI)

Wind resource assessment with a mesoscale non- hydrostatic model Vincent Guénard, Center for Energy is developed for assessing the wind resource and its uncertainty. The work focuses on an existing wind farm mast measurements. The wind speed and turbulence fields are discussed. It is shown that the k

Paris-Sud XI, Université de

256

The New NMC Mesoscale Eta Model: Description and Forecast Examples  

Science Conference Proceedings (OSTI)

In mid-1994 a new version of the Eta Model will begin producing operational forecast guidance down to mesoscale ranges. This version will have a horizontal resolution of approximately 30 km and about 50 layers in the vertical. A summary of the ...

Thomas L. Black

1994-06-01T23:59:59.000Z

257

Mesoscale Model Experimental Forecasts of the Haar of Northeast Scotland  

Science Conference Proceedings (OSTI)

A mesoscale model is used to simulate the diurnal evolution of sea fog off the northeast Scottish coast observed on 27 April 1984. It is shown that the accuracy of the early part of the forecast is very dependent on the specification of the ...

S. P. Ballard; B. W. Golding; R. N. B. Smith

1991-09-01T23:59:59.000Z

258

The Mesoscale Structure of Severe Precipitation Systems in Switzerland  

Science Conference Proceedings (OSTI)

The structures of severe mesoscale precipitation systems (MPS) in Switzerland have been classified by analyzing radar images obtained over a 5-yr period. Severe MPSs were defined to be those producing most of the damage on days on which at least ...

H. H. Schiesser; R. A. Houze Jr.; H. Huntrieser

1995-07-01T23:59:59.000Z

259

Mesoscale Surface Pressure and Temperature Features Associated with Bow Echoes  

Science Conference Proceedings (OSTI)

This study examines observed mesoscale surface pressure, temperature, and wind features of bow echoes. Bow-echo events in the area of the Oklahoma Mesonet are selected for study to take advantage of high-resolution surface data. Thirty-six cases ...

Rebecca D. Adams-Selin; Richard H. Johnson

2010-01-01T23:59:59.000Z

260

Scale Interaction and Predictability in a Mesoscale Model  

Science Conference Proceedings (OSTI)

Scale interaction is examined in the limited-area PSU/NCAR mesoscale model, with emphasis on the forcing of small scales by the small-scale fields themselves. Output data from the model are filtered by expanding fields at each level in two-...

Andrew H. Van Tuyl; Ronald M. Errico

1989-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Mesoscale Convective Systems in Weakly Forced Large-Scale Environments. Part II: Generation of a Mesoscale Initial Condition  

Science Conference Proceedings (OSTI)

A series of five mesoscale convective systems (MCSs) developed within a weakly forced large-scale environment on 11 and 12 May 1982. Two of these systems had a large component of motion against the midtroposphoric flow and propagated in a ...

David J. Stensrud; J. Michael Fritsch

1994-09-01T23:59:59.000Z

262

Atmospheric Aerosols  

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

Tom Kirchstetter with aerosol measurement instrument Atmospheric Aerosols Atmospheric aerosol research at LBNL seeks to understand the air quality and climate impacts of particles...

263

Marine Atmospheric Boundary Layer Divergence and Clouds along California in June 1996  

Science Conference Proceedings (OSTI)

The authors have performed a numerical experiment using Mesoscale Model 5 (MM5) with a horizontal resolution of 9 km to simulate hourly atmospheric dynamics and thermodynamics along the U.S. California coast for all of June 1996. The MM5 results ...

Darko Kora?in; Clive E. Dorman

2001-08-01T23:59:59.000Z

264

Impact of Atmospheric Infrared Sounder Data on the Numerical Simulation of a Historical Mumbai Rain Event  

Science Conference Proceedings (OSTI)

In this paper, the three-dimensional variational data assimilation scheme (3DVAR) in the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (Penn State–NCAR) Mesoscale Model (MM5) is used to study the impact ...

Randhir Singh; P. K. Pal; C. M. Kishtawal; P. C. Joshi

2008-10-01T23:59:59.000Z

265

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

Science Conference Proceedings (OSTI)

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

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

2007-02-01T23:59:59.000Z

266

Mesoscale Modeling of LX-17 Under Isentropic Compression  

SciTech Connect

Mesoscale simulations of LX-17 incorporating different equilibrium mixture models were used to investigate the unreacted equation-of-state (UEOS) of TATB. Candidate TATB UEOS were calculated using the equilibrium mixture models and benchmarked with mesoscale simulations of isentropic compression experiments (ICE). X-ray computed tomography (XRCT) data provided the basis for initializing the simulations with realistic microstructural details. Three equilibrium mixture models were used in this study. The single constituent with conservation equations (SCCE) model was based on a mass-fraction weighted specific volume and the conservation of mass, momentum, and energy. The single constituent equation-of-state (SCEOS) model was based on a mass-fraction weighted specific volume and the equation-of-state of the constituents. The kinetic energy averaging (KEA) model was based on a mass-fraction weighted particle velocity mixture rule and the conservation equations. The SCEOS model yielded the stiffest TATB EOS (0.121{micro} + 0.4958{micro}{sup 2} + 2.0473{micro}{sup 3}) and, when incorporated in mesoscale simulations of the ICE, demonstrated the best agreement with VISAR velocity data for both specimen thicknesses. The SCCE model yielded a relatively more compliant EOS (0.1999{micro}-0.6967{micro}{sup 2} + 4.9546{micro}{sup 3}) and the KEA model yielded the most compliant EOS (0.1999{micro}-0.6967{micro}{sup 2}+4.9546{micro}{sup 3}) of all the equilibrium mixture models. Mesoscale simulations with the lower density TATB adiabatic EOS data demonstrated the least agreement with VISAR velocity data.

Springer, H K; Willey, T M; Friedman, G; Fried, L E; Vandersall, K S; Baer, M R

2010-03-06T23:59:59.000Z

267

Parameterization of Convective Precipitation in Mesoscale Numerical Models: A Critical Review  

Science Conference Proceedings (OSTI)

Current approaches for incorporating cumulus convection into mesoscale numerical models are divided into three groups. The traditional approach utilizes cumulus parameterization at convectively unstable points and explicit (nonparameterized) ...

John Molinari; Michael Dudek

1992-02-01T23:59:59.000Z

268

Surface and synoptic features of leading and parallel stratiform mesoscale convective systems.  

E-Print Network (OSTI)

??This study investigates the surface wind, pressure, and temperature patterns associated with mesoscale convective systems meeting the classification of leading or parallel stratiform. Cases were… (more)

Steinweg-Woods, Jesse Matthew

2010-01-01T23:59:59.000Z

269

Mesoscale meteorological measurements characterizing complex flows  

Science Conference Proceedings (OSTI)

Meteorological measurements are an integral and essential component of any emergency response system for addressing accidental releases from nuclear facilities. An important element of the US Department of Energy`s (DOE`s) Atmospheric Studies in Complex Terrain (ASCOT) program is the refinement and use of state-of-the-art meteorological instrumentation. ASCOT is currently making use of ground-based remote wind sensing instruments such as doppler acoustic sounders (sodars). These instruments are capable of continuously and reliably measuring winds up to several hundred meters above the ground, unattended. Two sodars are currently measuring the winds, as part of ASCOT`s Front Range Study, in the vicinity of DOE`s Rocky Flats Plant (RFP) near Boulder, Colorado. A brief description of ASCOT`s ongoing Front Range Study is given followed by a case study analysis that demonstrates the utility of the meteorological measurement equipment and the complexity of flow phenomena that are experienced near RFP. These complex flow phenomena can significantly influence the transport of the released material and consequently need to be identified for accurate assessments of the consequences of a release.

Hubbe, J.M.; Allwine, K.J.

1993-09-01T23:59:59.000Z

270

The Influence of Mesoscale Humidity and Evapotranspiration Fields on a Model Forecast of a Cold-Frontal Squall Line  

Science Conference Proceedings (OSTI)

Satellite imagery and rain gauge data are combined to create mesoscale detail in the initial states of relative humidity (RH) and surface moisture availability (M) for a mesoscale model simulation. The most profound impact of inserting the ...

Steven E. Koch; Ahmet Aksakal; Jeffery T. McQueen

1997-03-01T23:59:59.000Z

271

The Effect of Mesoscale Heterogeneity on the Genesis and Structure of Mesovortices within Quasi-Linear Convective Systems  

Science Conference Proceedings (OSTI)

This study examines the structure and evolution of quasi-linear convective systems (QLCSs) within complex mesoscale environments. Convective outflows and other mesoscale features appear to affect the rotational characteristics and associated ...

Dustan M. Wheatley; Robert J. Trapp

2008-11-01T23:59:59.000Z

272

Convection-Allowing and Convection-Parameterizing Ensemble Forecasts of a Mesoscale Convective Vortex and Associated Severe Weather Environment  

Science Conference Proceedings (OSTI)

An analysis of a regional severe weather outbreak that was related to a mesoscale convective vortex (MCV) is performed. The MCV-spawning mesoscale convection system (MCS) formed in northwest Kansas along the southern periphery of a large cutoff ...

Adam J. Clark; William A. Gallus Jr.; Ming Xue; Fanyou Kong

2010-08-01T23:59:59.000Z

273

Dynamics and Structure of Mesoscale Error Covariance of a Winter Cyclone Estimated through Short-Range Ensemble Forecasts  

Science Conference Proceedings (OSTI)

Several sets of short-range mesoscale ensemble forecasts generated with different types of initial perturbations are used in this study to investigate the dynamics and structure of mesoscale error covariance in an intensive extratropical ...

Fuqing Zhang

2005-10-01T23:59:59.000Z

274

Sensitivity of a Mesoscale Model to Microphysical Parameterizations in the MAP SOP Events IOP2b and IOP8  

Science Conference Proceedings (OSTI)

The sensitivity of a mesoscale model to different microphysical parameterizations is investigated for two events of precipitation in the Mediterranean region, that is, the Mesoscale Alpine Program (MAP) intensive observation periods (IOP) 2b (19–...

Stefano Serafin; Rossella Ferretti

2007-09-01T23:59:59.000Z

275

Combustion in Meso-scale Vortex Chambers Ming-hsun Wu*  

E-Print Network (OSTI)

1 Combustion in Meso-scale Vortex Chambers Ming-hsun Wu* , Yanxing Wang, Vigor Yang and Richard A) #12;2 COMBUSTION IN MESO-SCALE VORTEX CHAMBERS Ming-hsun Wu, Yanxing Wang, Vigor Yang and Richard A with the chemical energy varying from 25 to 174W. For the largest combustion volume, hydrogen and hydrocarbons

Yang, Vigor

276

Mesoscale Momentum Budget in a Midlatitude Squall Line: A Numerical Case Study  

Science Conference Proceedings (OSTI)

A meso?-scale momentum budget and its effect on larger-scale mean flow in a midlatitude mesoscale convective system are investigated using a numerical simulation of an intense squall line that occurred during 10–11 June 1985 PRE-STORM. It is ...

Kun Gao; Da-Lin Zhang; Mitchell W. Moncrieff; Han-Ru Cho

1990-05-01T23:59:59.000Z

277

The 13–14 December 2001 IMPROVE-2 Event. Part I: Synoptic and Mesoscale Evolution and Comparison with a Mesoscale Model Simulation  

Science Conference Proceedings (OSTI)

This paper describes the large-scale synoptic and mesoscale features of a major precipitation event that affected the second Improvement of Microphysical Parameterization through Observational Verification Experiment (IMPROVE-2) study area on 13–...

Matthew F. Garvert; Brian A. Colle; Clifford F. Mass

2005-10-01T23:59:59.000Z

278

Customizing mesoscale self-assembly with 3D printing  

E-Print Network (OSTI)

Self-assembly due to capillary forces is a common method for generating 2D mesoscale structures from identical floating particles at the liquid-air interface. Designing building blocks to obtain a desired mesoscopic structure is a scientific challenge. We show herein that it is possible to shape the particles with a low cost 3D printer, for composing specific mesoscopic structures. Our method is based on the creation of capillary multipoles inducing either attractive or repulsive forces. Since capillary interactions can be downscaled, our method opens new ways to low cost microfabrication.

M. Poty; G. Lumay; N. Vandewalle

2013-10-17T23:59:59.000Z

279

Mesoscale Benchmark Demonstration Problem 1: Mesoscale Simulations of Intra-granular Fission Gas Bubbles in UO2 under Post-irradiation Thermal Annealing  

SciTech Connect

A study was conducted to evaluate the capabilities of different numerical methods used to represent microstructure behavior at the mesoscale for irradiated material using an idealized benchmark problem. The purpose of the mesoscale benchmark problem was to provide a common basis to assess several mesoscale methods with the objective of identifying the strengths and areas of improvement in the predictive modeling of microstructure evolution. In this work, mesoscale models (phase-field, Potts, and kinetic Monte Carlo) developed by PNNL, INL, SNL, and ORNL were used to calculate the evolution kinetics of intra-granular fission gas bubbles in UO2 fuel under post-irradiation thermal annealing conditions. The benchmark problem was constructed to include important microstructural evolution mechanisms on the kinetics of intra-granular fission gas bubble behavior such as the atomic diffusion of Xe atoms, U vacancies, and O vacancies, the effect of vacancy capture and emission from defects, and the elastic interaction of non-equilibrium gas bubbles. An idealized set of assumptions was imposed on the benchmark problem to simplify the mechanisms considered. The capability and numerical efficiency of different models are compared against selected experimental and simulation results. These comparisons find that the phase-field methods, by the nature of the free energy formulation, are able to represent a larger subset of the mechanisms influencing the intra-granular bubble growth and coarsening mechanisms in the idealized benchmark problem as compared to the Potts and kinetic Monte Carlo methods. It is recognized that the mesoscale benchmark problem as formulated does not specifically highlight the strengths of the discrete particle modeling used in the Potts and kinetic Monte Carlo methods. Future efforts are recommended to construct increasingly more complex mesoscale benchmark problems to further verify and validate the predictive capabilities of the mesoscale modeling methods used in this study.

Li, Yulan; Hu, Shenyang Y.; Montgomery, Robert; Gao, Fei; Sun, Xin; Tonks, Michael; Biner, Bullent; Millet, Paul; Tikare, Veena; Radhakrishnan, Balasubramaniam; Andersson , David

2012-04-11T23:59:59.000Z

280

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

Science Conference Proceedings (OSTI)

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

Jinwon Kim; Jung-Eun Lee

2003-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Observations and Numerical Simulation of Atmospheric Cellular Convection over Mesoscale Topography  

Science Conference Proceedings (OSTI)

Radar and satellite images provide observations of convective rolls and other structures in the convective boundary layer (CBL), but the data are intermittent, and neither radar nor satellite gives a complete picture of roll circulation in the ...

Wenshou Tian; Douglas J. Parker; Charles A. D. Kilburn

2003-01-01T23:59:59.000Z

282

Modifying a Mesoscale Meteorological Model to Better Incorporate Urban Heat Storage: A Bulk-Parameterization Approach  

Science Conference Proceedings (OSTI)

A simple bulk-parameterization scheme is implemented in modifying a mesoscale meteorological model to better incorporate urban heat storage. The objective is to improve the quantification of the fluxes associated with heat storage change and to ...

Haider Taha

1999-04-01T23:59:59.000Z

283

Statistical Properties of Three-Hour Prediction “Errors” Derived from the Mesoscale Analysis and Prediction System  

Science Conference Proceedings (OSTI)

Statistical properties of observed residuals from the Mesoscale Analysis and Prediction System (MAPS), a real-time data assimilation system, were investigated. Observed residuals are defined as differences between rawinsonde observations ...

Dezs? Dévényi; Thomas W. Schlatter

1994-06-01T23:59:59.000Z

284

Initiation of an Elevated Mesoscale Convective System Associated with Heavy Rainfall  

Science Conference Proceedings (OSTI)

A mesoscale convective system (MCS) developed during the morning hours of 6 June 1993 and moved across northern and central Missouri, resulting in a narrow swath of excessive rainfall (>150 mm). The MCS developed well north of a surface warm ...

Scott M. Rochette; James T. Moore

1996-12-01T23:59:59.000Z

285

Case Study of a Severe Mesoscale Convective System in Central Arizona  

Science Conference Proceedings (OSTI)

A mesoscale convective system (MCS) developed over central Arizona during the late evening and early morning of 23–24 July 1990 and produced widespread heavy rain, strong winds, and damage to buildings, vehicles, power poles, and trees across ...

Darren M. McCollum; Robert A. Maddox; Kenneth W. Howard

1995-09-01T23:59:59.000Z

286

A Process Study of Mesoscale Meanders and Eddies in the Norwegian Coastal Current  

Science Conference Proceedings (OSTI)

A series of NOAA satellite images shows that the Norwegian Coastal Current (NCC) over the Norwegian Trench was disturbed by mesoscale meanders with 60–100 km wavelengths. In the first several days, the meanders grew and propagated northward. Some ...

M. Ikeda; J. A. Johannessen; K. Lygre; S. Sandven

1989-01-01T23:59:59.000Z

287

Numerical Simulation of Topographically Forced Mesoscale Variability in a Well-Mixed Marine Layer  

Science Conference Proceedings (OSTI)

A simple nonlinear numerical model of a well-mixed marine layer is used to study topographically forced mesoscale variability off coastal California. The model is used to simulate a persistent wind maximum observed near Point Conception during ...

Lee W. Eddington; J. J. O'brien; D. W. Stuart

1992-12-01T23:59:59.000Z

288

Diagnosis of Convective and Mesoscale Motions During Phase IH of Gate  

Science Conference Proceedings (OSTI)

Observational evidence from GATE suggests that a significant fraction of precipitation in tropical disturbances over the eastern Atlantic occurs beneath anvil-type mesoscale convective systems that are frequently associated with intense ...

Richard H. Johnson

1980-04-01T23:59:59.000Z

289

Implementation and Validation of a Condensation Scheme in a Nonhydrostatic Mesoscale Model  

Science Conference Proceedings (OSTI)

In this paper a condensation scheme is implemented in a nonhydrostatic mesoscale model (MEMO). An overview of the model and the modified Sundqvist condensation scheme are given. The model, including condensation (MEMOIC), is tested on two well-...

Anne Dagrun Sandvik

1998-07-01T23:59:59.000Z

290

Serial Upstream-Propagating Mesoscale Convective System Events over Southeastern South America  

Science Conference Proceedings (OSTI)

Serial mesoscale convective system (MCS) events with lifetimes over 18 h and up to nearly 70 h are routinely observed over southeastern South America from infrared satellite imagery during the spring and summer. These events begin over the ...

Vagner Anabor; David J. Stensrud; Osvaldo L. L. de Moraes

2008-08-01T23:59:59.000Z

291

Convective Evolution and Merger in the FACE Experimental Area: Mesoscale Convection and Boundary Layer Interactions  

Science Conference Proceedings (OSTI)

This paper investigates the interactions between the various scales of motion and, specifically, the inter-actions between convection and the surface boundary layer in the development of a mesoscale convective system within the Florida Area ...

John B. Cunning; Ronald L. Holle; Patrick T. Gannon; Andrew I. Watson

1982-07-01T23:59:59.000Z

292

On the Use of Mesoscale and Cloud-Scale Models in Operational Forecasting  

Science Conference Proceedings (OSTI)

In the near future, the technological capability will be available to use mesoscale and cloud-scale numerical models for forecasting convective weather in operational meteorology. We address some of the issues concerning effective utilization of ...

Harold E. Brooks; Charles A. Doswell III; Robert A. Maddox

1992-03-01T23:59:59.000Z

293

Simulating Typhoon Floods with Gauge Data and Mesoscale-Modeled Rainfall in a Mountainous Watershed  

Science Conference Proceedings (OSTI)

A physically based distributed hydrological model was applied to simulate typhoon floods over a mountainous watershed in Taiwan. The meteorological forcings include the observed gauge rainfall data and the predicted rainfall data from a mesoscale ...

Ming-Hsu Li; Ming-Jen Yang; Ruitang Soong; Hsiao-Ling Huang

2005-06-01T23:59:59.000Z

294

Environment and Evolution of a Cold-Frontal Mesoscale Convective System  

Science Conference Proceedings (OSTI)

Observations from the Oklahoma-Kansas Preliminary Regional Experiment for STORM-CENTRAL (OK PRE-STORM) have been used to study the evolution and propagation characteristics of a long-lived (?16 h) mesoscale convective system (MCS) that produced ...

Stanley B. Trier; David B. Parsons; John H. E. Clark

1991-10-01T23:59:59.000Z

295

The Large-Scale Environments of the Global Populations of Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

The mean genesis environment was constructed for each of five mesoscale convective complex (MCC) population centers around the world: Africa, Australia, China, South America, and the United States. It is found that the environments are very ...

Arlene G. Laing; J. Michael Fritsch

2000-08-01T23:59:59.000Z

296

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

297

TY JOUR T1 Mesoscale Climatic Simulation of Surface Air Temperature Cooling  

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

Mesoscale Climatic Simulation of Surface Air Temperature Cooling Mesoscale Climatic Simulation of Surface Air Temperature Cooling by Highly Reflective Greenhouses in SE Spain JF Environmental Science Technology A1 Campra Pablo A1 Dev Millstein KW buildings KW Heat Island Group AB p span A long term local cooling trend in surface air temperature has been monitored at the largest concentration of reflective greenhouses in the world at the Province of Almeria SE Spain associated with a dramatic increase in surface albedo in the area The availability of reliable long term climatic field data at this site offers a unique opportunity to test the skill of mesoscale meteorological models describing and predicting the impacts of land use change on local climate Using the Weather Research and Forecast WRF mesoscale model we have run a

298

A Study of Rainfall Interception Using a 1And Surface Parameterization for Mesoscale Meteorological Models  

Science Conference Proceedings (OSTI)

Rainfall interception by vegetation canopies is studied using a parameterization of land surface Processes for mesoscale meteorological models. The interception scheme allows for a single vegetation canopy, and manages interception through a ...

Jean-François Mahfouf; Bruno Jacquemin

1989-12-01T23:59:59.000Z

299

Mesoscale Features and Cloud Organization on 10–12 December 1978 over the South China Sea  

Science Conference Proceedings (OSTI)

Aircraft data from Winter MONEX have been combined with other data to study mesoscale features, and organization of cumulus clouds, on 10–12 December 1978. A moderate cold surge in the northeasterly monsoon flow, toward cloudiness in an ...

Charles Warner

1982-07-01T23:59:59.000Z

300

Three Examples of Fair-Weather Mesoscale Boundary-Layer Convection in the Tropics  

Science Conference Proceedings (OSTI)

Evidence indicates that fair-weather to towering cumulus clouds over the East Atlantic Ocean during GATE were frequently organized into mesoscale structures. Three examples of such structures are examined, using gust-probe aircraft data collected ...

Margaret A. LeMone; Rebecca J. Meitin

1984-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Numerical Investigation of Mesoscale Circulations over the Los Angeles Basin. Part I. A Verification Study  

Science Conference Proceedings (OSTI)

This paper describes some improvements to the Colorado State University mesoscale model and the evaluation of the model's accuracy in simulating airflows in the Los Angeles Basin. Model output was compared with observations taken on two ...

Brian L. Ulrickson; Clifford F. Mass

1990-10-01T23:59:59.000Z

302

Design of a high-speed, meso-scale nanopositioners driven by electromagnetic actuators  

E-Print Network (OSTI)

The purpose of this thesis is to generate the design and fabrication knowledge that is required to engineer high-speed, six-axis, meso-scale nanopositioners that are driven by electromagnetic actuators. When compared to ...

Golda, Dariusz, 1979-

2008-01-01T23:59:59.000Z

303

Antarctic Mesoscale Prediction System (AMPS): A Case Study from the 2000–01 Field Season  

Science Conference Proceedings (OSTI)

To support the forecasting needs of the United States Antarctic Program at McMurdo, Antarctica, a special numerical weather prediction program, the Antarctic Mesoscale Prediction System (AMPS), was established for the 2000–01 field season. AMPS ...

David H. Bromwich; Andrew J. Monaghan; Jordan G. Powers; John J. Cassano; He-Lin Wei; Ying-Hwa Kuo; Andrea Pellegrini

2003-02-01T23:59:59.000Z

304

Total Lightning Characteristics Relative to Radar and Satellite Observations of Oklahoma Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The advent of regional very high frequency (VHF) Lightning Mapping Arrays (LMAs) makes it possible to begin analyzing trends in total lightning characteristics in ensembles of mesoscale convective systems (MCSs). Flash initiations observed by the ...

Jeffrey A. Makowski; Donald R. MacGorman; Michael I. Biggerstaff; William H. Beasley

2013-05-01T23:59:59.000Z

305

An Optimal Filter for Geostrophic Mesoscale Currents from Along-Track Satellite Altimetry  

Science Conference Proceedings (OSTI)

An optimal difference operator is derived for smoothing along-track sea surface height measurements from satellite altimeters and computing geostrophic surface currents at or below ocean mesoscale wavelengths with second-order approximation ...

Brian S. Powell; Robert R. Leben

2004-10-01T23:59:59.000Z

306

Processes Leading to the Formation of Mesoscale Waves in the Midwest Cyclone of 15 December 1987  

Science Conference Proceedings (OSTI)

On 15 December 1987, several long-lived, large-amplitude mesoscale wave disturbances accompanied a rapidly developing extratropical cyclone in the midwest United States. Previous observational and modeling studies have suggested that the ...

Peter J. Pokrandt; Gregory J. Tripoli; David D. Houghton

1996-12-01T23:59:59.000Z

307

Airflow and Precipitation Structure of Two Leading Stratiform Mesoscale Convective Systems Determined from Operational Datasets  

Science Conference Proceedings (OSTI)

An analysis of the airflow and precipitation structure of two leading stratiform (LS) mesoscale convective systems (MCSs) is presented. Leading stratiform systems are defined as linear MCSs that consist of a convective line with leading ...

Crystalyne R. Pettet; Richard H. Johnson

2003-10-01T23:59:59.000Z

308

A Phase-Plot Method for Diagnosing Vorticity Concentration Mechanisms in Mesoscale Convective Vortices  

Science Conference Proceedings (OSTI)

Mesoscale convective vortex (MCV) analysis results show that these vortices form by way of different evolutionary paths. Rewriting the traditional form of the relative vertical vorticity equation in terms of momentum advection curl produces an ...

James R. Kirk

2007-03-01T23:59:59.000Z

309

Mesoscale Cyclone Activity over the Ice-Free Southern Ocean: 1999–2008  

Science Conference Proceedings (OSTI)

Mesoscale cyclones play an important role in the weather and climate of the Southern Hemisphere (SH) mid-to-high latitudes. However, the relatively small size and short lifetime of these systems, combined with the lack of available conventional ...

Damien Irving; Ian Simmonds; Kevin Keay

2010-10-01T23:59:59.000Z

310

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

Science Conference Proceedings (OSTI)

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

Clifford F. Mass; David P. Dempsey

1985-07-01T23:59:59.000Z

311

Large-Amplitude Mesoscale Wave Disturbances Within the Intense Midwest Extratropical Cyclone of 15 December 1987  

Science Conference Proceedings (OSTI)

On 15 December 1987 several long-lived, large-amplitude mesoscale wave disturbances embedded within a rapidly intensifying extratropical cyclone traversed the Midwest and created life-threatening blizzard conditions. Within the wave disturbances, ...

Russell S. Schneider

1990-12-01T23:59:59.000Z

312

An Investigation of an Arctic Front with a Vertically Nested Mesoscale Model  

Science Conference Proceedings (OSTI)

A vertically mesoscale regional numerical weather prediction model is used to simulate an arctic front. The front was observed during the Arctic Cyclone Expedition of 1984. The regional model employs a unique vertical nesting scheme in which the ...

William T. Thompson; Stephen D. Burk

1991-02-01T23:59:59.000Z

313

Numerical Study of Terrain-Induced Mesoscale Motions in a Mixed Layer  

Science Conference Proceedings (OSTI)

Numerical integrations using a potential enstrophy conserving scheme are presented for the flow within a mixed layer over hilly terrain using the hydrostatic shallow-water equations with a quadratic drag law. The mesoscale area treated is 150 km ...

Y-J. Han; K. Ueyoshi; J. W. Deardorff

1982-11-01T23:59:59.000Z

314

Mesoscale Convective Vortices Observed during BAMEX. Part I: Kinematic and Thermodynamic Structure  

Science Conference Proceedings (OSTI)

Five cases of mesoscale convective vortices (MCVs) are described from observations collected during the Bow Echo and MCV Experiment (BAMEX) over the central United States during the period from 20 May to 6 July 2003. In the present paper, the ...

Christopher A. Davis; Stanley B. Trier

2007-06-01T23:59:59.000Z

315

A Glider Network Design Study for a Synoptic View of the Oceanic Mesoscale Variability  

Science Conference Proceedings (OSTI)

This study presents an Observing System Simulation Experiment (OSSE) with a network of gliders in a realistic mesoscale field of eddies and filaments. The main objective is to demonstrate that the analysis skill evaluation, performed with ...

Blandine L'Hévéder; Laurent Mortier; Pierre Testor; François Lekien

2013-07-01T23:59:59.000Z

316

Aerosol–Cloud Interactions in a Mesoscale Model. Part II: Sensitivity to Aqueous-Phase Chemistry  

Science Conference Proceedings (OSTI)

The feedbacks between aerosols, cloud microphysics, and cloud chemistry are investigated in a mesoscale model. A simple bulk aqueous-phase sulfur chemistry scheme was fully coupled to the existing aerosol and microphysics schemes. The ...

Irena T. Ivanova; Henry G. Leighton

2008-02-01T23:59:59.000Z

317

Moving and Stationary Mesoscale Convective Systems over Northwest Mexico during the Southwest Area Monsoon Project  

Science Conference Proceedings (OSTI)

Some characteristics of the life cycle and motion of Mesoscale Convective Systems (MCSs), which formed over the northern Sierra Madre Occidental during the Southwest Area Monsoon Project (SWAMP), are examined. The motion characteristics of MCSs ...

Luis M. Farfán; Joseph A. Zehnder

1994-12-01T23:59:59.000Z

318

Composite Life Cycle of Maritime Tropical Mesoscale Convective Systems in Scatterometer and Microwave Satellite Observations  

Science Conference Proceedings (OSTI)

This study examines scatterometer-observed surface wind divergence and vorticity, along with precipitable water (PW), across the life cycle of tropical maritime mesoscale convective systems (MCSs) as resolved in 0.5° data. Simple composites were ...

Brian Mapes; Ralph Milliff; Jan Morzel

2009-01-01T23:59:59.000Z

319

Mesoscale Modeling of a Cold Front and Its Interaction with a Diurnally Heated Land Mass  

Science Conference Proceedings (OSTI)

A mesoscale numerical model incorporating a detailed planetary boundary-layer scheme, including momentum, heat and moisture exchange with the lower boundary, is used to study the change in structure of a dry summertime front as it moves towards a ...

William L. Physick

1988-11-01T23:59:59.000Z

320

Horizontal Distribution of Electrical and Meteorological Conditions across the Stratiform Region of a Mesoscale Convective System  

Science Conference Proceedings (OSTI)

Five soundings of the electric field and thermodynamic properties were made in a mesoscale convective system (MCS) that occurred in Oklahoma and Texas on 2–3 June 1991. Airborne Doppler radar data were obtained from three passes through the ...

Maribeth Stolzenburg; Thomas C. Marshall; W. David Rust; Bradley F. Smull

1994-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Electric and Kinematic Structure of the Oklahoma Mesoscale Convective System of 7 June 1989  

Science Conference Proceedings (OSTI)

Balloon soundings of electric field in Oklahoma mesoscale convective systems (MCS's) were made by the National Severe Storms Laboratory (NSSL) during the spring of 1989. A sounding made in the rearward edge of an MCS stratiform rain area on 7 ...

Steven M. Hunter; Terry J. Schuur; Thomas C. Mapshall; W. David Rust

1992-10-01T23:59:59.000Z

322

A Wireless Network for Collection and Synthesis of Mobile Mesoscale Weather Observations  

Science Conference Proceedings (OSTI)

This paper reports the development of a wireless network of instrumented vehicles and aircraft for the real-time collection and synthesis of their mobile weather observations in mesoscale field experiments. The mobile digital network (MDN) ...

Conrad L. Ziegler; Douglas Kennedy; Erik N. Rasmussen

2004-11-01T23:59:59.000Z

323

Mesoscale Eddy Buoyancy Flux and Eddy-Induced Circulation in Eastern Boundary Currents  

Science Conference Proceedings (OSTI)

A dynamical interpretation is made of the mesoscale eddy buoyancy fluxes in the Eastern Boundary Currents off California and Peru–Chile, based on regional equilibrium simulations. The eddy fluxes are primarily shoreward and upward across a swath ...

François Colas; Xavier Capet; James C. McWilliams; Zhijin Li

2013-06-01T23:59:59.000Z

324

Cloud Shading Retrieval and Assimilation in a Satellite-Model Coupled Mesoscale Analysis System  

Science Conference Proceedings (OSTI)

A retrieval-assimilation method has been developed as a quantitative means to exploit the information in satellite imagery regarding shading of the ground by clouds, as applied to mesoscale weather analysis. Cloud radiative parameters are ...

Alan E. Lipton

1993-11-01T23:59:59.000Z

325

Intercomparison of Mesoscale Model Simulations of the Daytime Valley Wind System  

Science Conference Proceedings (OSTI)

Three-dimensional simulations of the daytime thermally induced valley wind system for an idealized valley–plain configuration, obtained from nine nonhydrostatic mesoscale models, are compared with special emphasis on the evolution of the along-...

Juerg Schmidli; Brian Billings; Fotini K. Chow; Stephan F. J. de Wekker; James Doyle; Vanda Grubiši?; Teddy Holt; Qiangfang Jiang; Katherine A. Lundquist; Peter Sheridan; Simon Vosper; C. David Whiteman; Andrzej A. Wyszogrodzki; Günther Zängl

2011-05-01T23:59:59.000Z

326

Mesoscale Convective Complexes Over the United States During 1981— Annual Summary  

Science Conference Proceedings (OSTI)

Satellite images are used to document the life cycles of Mesoscale Convective Complexes (MCCs) which occurred over the United States during the warm season months of 1981. These systems were found to exhibit characteristics similar to aspects of ...

R. A. Maddox; D. M. Rodgers; K. W. Howard

1982-10-01T23:59:59.000Z

327

A Numerical Study of Stratified Airflow over Mesoscale Heat Sources with Application to Carolina Coastal Frontogenesis  

Science Conference Proceedings (OSTI)

This paper presents the results from a numerical investigation of the responses of stratified airflow to prescribed near-surface mesoscale axisymmetric (circular) and elongated (elliptical) heat sources under uniform basic wind conditions using a ...

Lian Xie; Yuh-Lang Lin

1996-12-01T23:59:59.000Z

328

Sources of Mesoscale Variability of Gravity Waves. Part II: Frontal, Convective, and Jet Stream Excitation  

Science Conference Proceedings (OSTI)

We present studies of four cases of mesoscale variance enhancements of horizontal velocity and temperature due to frontal activity, nonfrontal convection, and wind shear. These data were obtained aboard commercial aircraft during the Global ...

David C. Fritts; Gregory D. Nastrom

1992-01-01T23:59:59.000Z

329

Model Uncertainty in a Mesoscale Ensemble Prediction System: Stochastic versus Multiphysics Representations  

Science Conference Proceedings (OSTI)

A multiphysics and a stochastic kinetic-energy backscatter scheme are employed to represent model uncertainty in a mesoscale ensemble prediction system using the Weather Research and Forecasting model. Both model-error schemes lead to significant ...

J. Berner; S.-Y. Ha; J. P. Hacker; A. Fournier; C. Snyder

2011-06-01T23:59:59.000Z

330

Mesoscale Generation of Available Potential Energy in the Warm Sector of an Extratropical Cyclone  

Science Conference Proceedings (OSTI)

Generation of available potential energy (APE) is computed for the warm sector of an extratropical cyclone containing intense convection. Three hourly mesoscale rawinsonde data from the 10–11 April day of AVESESAME 1979 are used to evaluate ...

Henry E. Fuelberg; Mark G. Ruminski; David O'C. Starr

1985-07-01T23:59:59.000Z

331

Some Effects of Different Cloud Parameterizations in a Mesoscale Model and a Chemistry Transport Model  

Science Conference Proceedings (OSTI)

Chemistry transport models often ignore the cloud parameters that can be provided by meteorological pre-processors like mesoscale meteorological models. They often recalculate these parameters with algorithms that differ from those used in the ...

Nicole Mölders; Heinz Hass; Hermann J. Jakobs; Manfred Laube; Adolf Ebel

1994-04-01T23:59:59.000Z

332

Assessment of the Aviation Weather Center Global Forecasts of Mesoscale Convective Systems*  

Science Conference Proceedings (OSTI)

This paper examines the precision of location and top height of mesoscale convective systems, as forecast by the Aviation Weather Center (AWC). The examination was motivated by the Mediterranean Israeli Dust Experiment (MEIDEX) on the space ...

Baruch Ziv; Yoav Yair; Karin Presman; Martin Füllekrug

2004-05-01T23:59:59.000Z

333

Using Precipitation Observations in a Mesoscale Short-Range Ensemble Analysis and Forecasting System  

Science Conference Proceedings (OSTI)

A simple method to assimilate precipitation data from a synthesis of radar and gauge data is developed to operate alongside an ensemble Kalman filter that assimilates hourly surface observations. The mesoscale ensemble forecast system consists of ...

Tadashi Fujita; David J. Stensrud; David C. Dowell

2008-06-01T23:59:59.000Z

334

The Influence of Mesoscale Orography on a Coastal Jet and Rainband  

Science Conference Proceedings (OSTI)

The role of mesoscale orography along the central California coast in the development and evolution of a coastal jet and rainband is investigated using a high-resolution, triply nested, nonhydrostatic numerical model. Comparison of the model ...

James D. Doyle

1997-07-01T23:59:59.000Z

335

Mesoscale Features Associated with Tropical Cyclone Formations in the Western North Pacific  

Science Conference Proceedings (OSTI)

The mesoscale features of 124 tropical cyclone formations in the western North Pacific Ocean during 1999–2004 are investigated through large-scale analyses, satellite infrared brightness temperature (TB), and Quick Scatterometer (QuikSCAT) ...

Cheng-Shang Lee; Kevin K. W. Cheung; Jenny S. N. Hui; Russell L. Elsberry

2008-06-01T23:59:59.000Z

336

Formation of Mesoscale Lines of Pirecipitation: Severe Squall Lines in Oklahoma during the Spring  

Science Conference Proceedings (OSTI)

Four distinct kinds of severe, mesoscale convective-line development are identified in Oklahoma during the spring based on the analysis of an 11-year period of reflectivity data from the National Severe Storms Laboratory's 10-cm radar in Norman, ...

Howard B. Bluestein; Michael H. Jain

1985-08-01T23:59:59.000Z

337

A Long-Lived Mesoscale Convective Complex. Part I: The Mountain–Generated Component  

Science Conference Proceedings (OSTI)

Using data collected during Colorado State University's South Park Area Cumulus Experiment in 1977, a sequence of multi-scale convective events leading to the formation of a mesoscale convective complex is described. In the first phase, surface-...

William R. Cotton; Raymond L. George; Peter J. Wetzel; Ray L. McAnelly

1983-10-01T23:59:59.000Z

338

Passive Microwave Observations of the Stratiform Regions of Two Tropical Oceanic Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

High-resolution passive microwave observations within the stratiform regions of two different tropical oceanic mesoscale convective systems are investigated in detail. The observations were obtained from the Advanced Microwave Precipitation ...

Gary McGaughey; Edward J. Zipser

1996-11-01T23:59:59.000Z

339

An Upper Boundary Condition Permitting Internal Gravity Wave Radiation in Numerical Mesoscale Models  

Science Conference Proceedings (OSTI)

A radiative upper boundary condition is proposed for numerical mesoscale models which allows vertically propagating internal gravity waves to pass out of the computational domain with minimal reflection. In this formulation, the pressure along ...

Joseph B. Klemp; Dale R. Durran

1983-03-01T23:59:59.000Z

340

Assimilation of Visible-Band Satellite Data for Mesoscale Forecasting in Cloudy Conditions  

Science Conference Proceedings (OSTI)

Assimilation of satellite data can enhance the ability of a mesoscale modeling system to produce accurate short-term forecasts of clouds and precipitation, but only if there is a mechanism for the satellite-derived information to propagate ...

Alan E. Lipton; George D. Modica

1999-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

The Role of Momentum Transport in the Motion of a Quasi-Idealized Mesoscale Convective System  

Science Conference Proceedings (OSTI)

Momentum transport is examined in a simulated midlatitude mesoscale convective system (MCS) to investigate its contribution to MCS motion. Momentum budgets are computed using model output to quantify the role of specific processes in determining ...

Kelly M. Mahoney; Gary M. Lackmann; Matthew D. Parker

2009-10-01T23:59:59.000Z

342

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

343

Mesoscale Frequencies and Seasonal Snowfalls for Different Types of Lake Michigan Snow Storms  

Science Conference Proceedings (OSTI)

Members of the Cloud Physics Laboratory, University of Chicago, have identified three different mesoscale organization patterns of lake-effect snow storms over Lake Michigan: multiple wind-parallel bands, single midlake bands, and single ...

Robert D. Kelly

1986-03-01T23:59:59.000Z

344

Mesoscale Boundary Layer Evolution over Complex Terrain. Part I. Numerical Simulation of the Diurnal Cycle  

Science Conference Proceedings (OSTI)

The continuous development of a meso-?-scale boundary layer over sloping terrain upwind of a high mountain barrier was simulated through a complete diurnal cycle using a nonhydrostatic boundary-layer model. The simulation detailed the evolution ...

David C. Bader; Thomas B. McKee; Gregory J. Tripoli

1987-10-01T23:59:59.000Z

345

A Shallow-Convection Parameterization for Mesoscale Models. Part I: Submodel Description and Preliminary Applications  

Science Conference Proceedings (OSTI)

A shallow-convection parameterization suitable for both marine and continental regimes is developed for use in mesoscale models. The scheme is closely associated with boundary layer turbulence processes and can transition to either a deep-...

Aijun Deng; Nelson L. Seaman; John S. Kain

2003-01-01T23:59:59.000Z

346

The Use of Surface Observations in Four-Dimensional Data Assimilation Using a Mesoscale Model  

Science Conference Proceedings (OSTI)

A system for the frequent intermittent assimilation of surface observations into a mesoscale model is described. The assimilation begins by transforming the surface observations to model coordinates. Next, the lowest-level model fields of ...

Frank H. Ruggiero; Keith D. Sashegyi; Rangarao V. Madala; Sethu Raman

1996-05-01T23:59:59.000Z

347

An Automated System for the Analysis of Gravity Waves and Other Mesoscale Phenomena  

Science Conference Proceedings (OSTI)

An automated near-real-time system for the surface analysis of gravity waves and other mesoscale phenomena is developed, tested, and applied to several cases. Five-minute observations from the Automated Surface Observing System (ASOS) network ...

Steven E. Koch; Stephen Saleeby

2001-12-01T23:59:59.000Z

348

A Model of Marine Boundary-Layer Cloudiness for Mesoscale Applications  

Science Conference Proceedings (OSTI)

A one-dimensional version of a multilevel mesoscale model is used to represent the cloud-topped boundary layer (CTBL). Turbulent exchanges are parameterized with a prognostic equation for the turbulent kinetic energy and an improved length-scale ...

Peter Bechtold; Jean Pierre Pinty; Charles Fravalo

1992-09-01T23:59:59.000Z

349

Mesoscale and Synoptic Scale Interactions Leading to Intense Convection: The Case of 7 June 1982  

Science Conference Proceedings (OSTI)

A case study is presented involving an unusually intense mesoscale convective system (MCS) which produced extensive hail and wind damage in northeast Kansas and northern Missouri, including the Kansas City metropolitan area, during the predawn ...

Anthony A. Rockwood; Robert A. Maddox

1988-03-01T23:59:59.000Z

350

Multiscale Convective Overturning in Mesoscale Convective Systems: Reconciling Observations, Simulations, and Theory  

Science Conference Proceedings (OSTI)

An analysis of how parameterized convection interacts with hydrostatic, explicitly resolved precipitation processes to represent multiscale convective overturning in a mesoscale-resolution numerical simulation is presented. Critically important ...

John S. Kain; J. Michael Fritsch

1998-08-01T23:59:59.000Z

351

Numerical Prediction of Convectively Driven Mesoscale Pressure Systems. Part I: Convective Parameterization  

Science Conference Proceedings (OSTI)

A parameterization formulation for incorporating the effects of midlatitude deep convection into mesoscale-numerical models is presented. The formulation is based on the hypothesis that the buoyant energy available to a parcel, in combination ...

J. M. Fritsch; C. F. Chappell

1980-08-01T23:59:59.000Z

352

The Life Cycle and Internal Structure of a Mesoscale Convective Complex  

Science Conference Proceedings (OSTI)

This paper describes the life cycle and precipitation structure of a Mesoscale Convective Complex (MCC) that passed through the data-collecting network of the Texas portion of the High Plains Cooperative Program (HIPLEX) on 8 June 1980. The MCC ...

Colleen A. Leary; Edward N. Rappaport

1987-08-01T23:59:59.000Z

353

Development of A Mesoscale Ensemble Data Assimilation System at The Naval Research Laboratory  

Science Conference Proceedings (OSTI)

An ensemble Kalman filter (EnKF) has been adopted and implemented at the Naval Research Laboratory (NRL) for mesoscale and storm-scale data assimilation to study the impact of ensemble assimilation of high-resolution observations, including those ...

Qingyun Zhao; Fuqing Zhang; Teddy Holt; Craig H. Bishop; Qin Xu

354

Observations of Mesoscale Circulations within Extratropical Cyclones over the North Atlantic Ocean during ERICA  

Science Conference Proceedings (OSTI)

Pseudo-dual-Doppler analyses of two mesoscale circulations (20–40 km in horizontal dimensions) that formed along a warm front within a rapidly deepening extratropical cyclone over the ocean are presented. The circulations were analyzed using ...

Ching-Hwang Liu; Roger M. Wakimoto; Frank Roux

1997-03-01T23:59:59.000Z

355

The Effects of Subgrid Model Mixing and Numerical Filtering in Simulations of Mesoscale Cloud Systems  

Science Conference Proceedings (OSTI)

Using the newly developed Weather Research and Forecasting (WRF) model, this study investigates the effects of subgrid mixing and numerical filtering in mesoscale cloud simulations by examining the sensitivities to the parameters in turbulence-...

Tetsuya Takemi; Richard Rotunno

2003-09-01T23:59:59.000Z

356

A Mesoscale Gravity Wave Event Observed during CCOPE. Part III: Wave Environment and Probable Source Mechanisms  

Science Conference Proceedings (OSTI)

Synoptic and special mesoscale observations taken during the Cooperative Convective Precipitation Experiment (CCOPE) are used to describe the multiscale environment of a gravity wave event, understand the wave-environment interactions that led to ...

Steven E. Koch; Paul B. Dorian

1988-12-01T23:59:59.000Z

357

The Role of Mesoscale Features in a Wintertime Great Lakes Cyclone  

Science Conference Proceedings (OSTI)

An analysis documenting the role of synoptic and surface mesoscale features in a cyclone has been conducted to determine the physical processes responsible for a large snowfall observed over south-central Wisconsin on 25 January 1988. Synoptic ...

Steven R. Silberberg

1990-03-01T23:59:59.000Z

358

Relationships between Lightning Location and Polarimetric Radar Signatures in a Small Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 19 June 2004, the Thunderstorm Electrification and Lightning Experiment observed electrical, microphysical, and kinematic properties of a small mesoscale convective system (MCS). The primary observing systems were the Oklahoma Lightning ...

Nicole R. Lund; Donald R. MacGorman; Terry J. Schuur; Michael I. Biggerstaff; W. David Rust

2009-12-01T23:59:59.000Z

359

Two Types of Vertical Electrical Structures in Stratiform Precipitation Regions of Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Electric field (E) soundings in the stratiform regions and transition zones of mesoscale convective systems (MCSs) are reported. Most of the E soundings were made during the 1991 Cooperative Oklahoma Profiler Studies (COPS-91). Multiple E ...

Thomas C. Marshall; W. David Rust

1993-11-01T23:59:59.000Z

360

Machining, Assembly, and Characterization of a Meso-Scale Double Shell Target  

SciTech Connect

Several issues related to the manufacture of precision meso-scale assemblies have been identified as part of an effort to fabricate an assembly consisting of machined polymer hemispherical shells and machined aerogel. The assembly, a double shell laser target, is composed of concentric spherical layers that were machined on a lathe and then assembled. This production effort revealed several meso-scale manufacturing techniques that worked well, such as the machining of aerogel with cutting tools to form low density structures, and the development of an assembly manipulator that allows control of the assembly forces to within a few milliNewtons. Limitations on the use of vacuum chucks for meso-scale components were also identified. Many of the lessons learned in this effort are not specific to double shell targets and may be relevant to the production of other meso-scale devices.

Bono, M J; Hibbard, R L

2003-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Satellite Radiance Assimilation in the JMA Operational Mesoscale 4D-Var System  

Science Conference Proceedings (OSTI)

The direct radiance assimilation scheme used in the Japan Meteorological Agency (JMA) global analysis system is applied to the JMA mesoscale 4-dimensional variational (4D-Var) system with two modifications. First, the data thinning distance is ...

Masahiro Kazumori

362

Mid-Latitude Mesoscale Temperature Variability in Six Multiship XBT Surveys  

Science Conference Proceedings (OSTI)

We discuss the spatial character of mesoscale temperature variability as observed in six midlatitude multiship expendable bathythermograph (XBT) surveys, two from the North Pacific and four from the North Atlantic. These surveys sample mid-ocean ...

D. E. Harrison; W. J. Emergy; J. P. Dugan; Bo-Cheng Li

1983-04-01T23:59:59.000Z

363

The Influence of Convectively Generated Thermal Forcing on the Mesoscale Circulation around Squall Lines  

Science Conference Proceedings (OSTI)

The dynamical processes that determine the kinematic and thermodynamic structure of the mesoscale region around 2D squall lines are examined using a series of numerical simulations. The features that develop in a realistic reference simulation of ...

Rajul E. Pandya; Dale R. Durran

1996-10-01T23:59:59.000Z

364

Mesoscale Cyclogenesis over the Southwestern Ross Sea Linked to Strong Katabatic Winds  

Science Conference Proceedings (OSTI)

Two years of automatic weather station (AWS) observations and satellite images have been used to study mesoscale cyclogenesis along the Transantarctic Mountains. Twice-daily regional sea-level pressure analyses revealed the frequent formation of ...

David H. Bromwich

1991-07-01T23:59:59.000Z

365

Water and Energy Budgets of a Florida Mesoscale Convective System: A Combined Observational and Modeling Study  

Science Conference Proceedings (OSTI)

Mesoscale water and energy budgets are diagnosed for a squall line during the Convection and Precipitation Electrification Experiment and combined with the results of the two-dimensional Goddard Cumulus Ensemble Model. The fine temporal and ...

J. Halverson; M. Garstang; J. Scala; W-K. Tao

1996-06-01T23:59:59.000Z

366

Effects of Different Rain Parameterizations on the Simulation of Mesoscale Orographic Precipitation  

Science Conference Proceedings (OSTI)

A detailed comparison is made between the results obtained from two microphysical parameterizations capable of simulating cloud and precipitation processes in a mesoscale model. The behavior of each microphysical scheme is first investigated in ...

Evelyne Richard; Nadine Chaumerliac

1989-11-01T23:59:59.000Z

367

Influence of Mesoscale Dynamics and Turbulence on Fine Dust Transport in Owens Valley  

Science Conference Proceedings (OSTI)

Fine dust particles emitted from Owens (dry) Lake in California documented during the Terrain-Induced Rotor Experiment (T-REX) of 2006 have been examined using surface observations and a mesoscale aerosol model. Air quality stations around Owens (...

Qingfang Jiang; Ming Liu; James D. Doyle

2011-01-01T23:59:59.000Z

368

Mesoscale Convective Systems over Western Equatorial Africa and Their Relationship to Large-Scale Circulation  

Science Conference Proceedings (OSTI)

This study examines mesoscale convective systems (MCSs) over western equatorial Africa using data from the Tropical Rainfall Measuring Mission (TRMM) satellite. This region experiences some of the world’s most intense thunderstorms and highest ...

Brian Jackson; Sharon E. Nicholson; Douglas Klotter

2009-04-01T23:59:59.000Z

369

Space and Time Scales of Mesoscale Motions in the Eastern North Atlantic  

Science Conference Proceedings (OSTI)

The Tourbillon experiment carried out in 1979–80 over the Porcupine Abyssal Plain in the eastern North Atlantic is the fist experiment providing data that allow an efficient description of the spatial structure of the mesoscale low-frequency ...

Herlé Mercier; Alain Colin De Verdiére

1985-02-01T23:59:59.000Z

370

Mapping the Oceanic Mesoscale Circulation: Validation of Satellite Altimetry Using Surface Drifters  

Science Conference Proceedings (OSTI)

This study aims to show that Lagrangian surface drifters are a suitable means of validating the mapping of oceanic mesoscale circulation by satellite altimetry. Tests are done using Geosat data to simulate drifter trajectories in the Azores-...

P. Y. Le Traon; F. Hernandez

1992-10-01T23:59:59.000Z

371

QNH: Design and Test of a Quasi-Nonhydrostatic Model for Mesoscale Weather Prediction  

Science Conference Proceedings (OSTI)

A new mesoscale weather prediction model, called QNH, is described. It is characterized by a parameter that multiplies the hydrostatic terms in the vertical equation of motion. Models of this type are referred to generically as “quasi-...

A. E. MacDonald; J. L. Lee; S. Sun

2000-04-01T23:59:59.000Z

372

The Importance of Understanding Mesoscale Model Parameterization Schemes for Weather Forecasting  

Science Conference Proceedings (OSTI)

A severe weather outbreak that occurred on 21–23 November 1992 in the southern United States is used to illustrate how an understanding of model parameterization schemes can help in the evaluation and utilization of mesoscale model output. ...

John V. Cortinas Jr.; David J. Stensrud

1995-12-01T23:59:59.000Z

373

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

Science Conference Proceedings (OSTI)

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

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

1998-07-01T23:59:59.000Z

374

A Climatology of the Mesoscale Environment Associated with Heavily Precipitating Events over a Northwestern Mediterranean Area  

Science Conference Proceedings (OSTI)

A climatological approach is developed to characterize the mesoscale environment in which heavily precipitating events (HPEs) grow over a mountainous Mediterranean area. This climatology that is based on three-dimensional variational data ...

Didier Ricard; Véronique Ducrocq; Ludovic Auger

2012-03-01T23:59:59.000Z

375

Spatial Variability of Liquid Water Path in Marine Low Cloud: The Importance of Mesoscale Cellular Convection  

Science Conference Proceedings (OSTI)

Liquid water path (LWP) mesoscale spatial variability in marine low cloud over the eastern subtropical oceans is examined using two months of daytime retrievals from the Moderate Resolution Imaging Spectroradiometer (MODIS) on the NASA Terra ...

Robert Wood; Dennis L. Hartmann

2006-05-01T23:59:59.000Z

376

Mesoscale Energy Spectra of Mei-Yu Front System. Part I: Kinetic Energy Spectra  

Science Conference Proceedings (OSTI)

The mesoscale kinetic energy (KE) spectra of Mei-Yu front system are investigated through idealized numerical simulations. In the mature stage, the upper tropospheric KE spectrum resembles a -3 power law for wavelengths between 1000 and 400 km and ...

Jun Peng; Lifeng Zhang; Yu Luo; Yun Zhang

377

The Impact of Nonsynoptic Sampling on Mesoscale Oceanographic Surveys with Towed Instruments  

Science Conference Proceedings (OSTI)

Mesoscale ocean features, such as eddies and frontal meanders, have temporal and spatial scales that are poorly resolved by conventional surveying methods such as moorings and CTD casts. Towed instruments provide a method of measuring ...

P. A. Matthews

1997-02-01T23:59:59.000Z

378

Mesoscale Subduction at the Antarctic Polar Front Driven by Baroclinic Instability  

Science Conference Proceedings (OSTI)

A study of mesoscale subduction at the Antarctic Polar Front (PF) is conducted by use of hydrographic data from a high-resolution, quasi-synoptic survey of the front. The geostrophic velocity and isopycnal potential vorticity (PV) fields are ...

Alberto C. Naveira Garabato; Harry Leach; John T. Allen; Raymond T. Pollard; Volker H. Strass

2001-08-01T23:59:59.000Z

379

Numerical Simulation of a Tropical Mesoscale Convective System Using the Arakawa-Schubert Cumulus Parameterization  

Science Conference Proceedings (OSTI)

As an extension of the work presented in an accompanying paper of Kao and Ogura, the Arakawa-Schubert cumulus parameterization scheme is examined prognostically in a modeling study of the evolution of a convectively driven tropical mesoscale ...

Yoshi Ogura; Chih-Yue Jim Kao

1987-09-01T23:59:59.000Z

380

The Impact of Crop Areas in Northeast Colorado on Midsummer Mesoscale Thermal Circulations  

Science Conference Proceedings (OSTI)

The present study provides a preliminary evaluation of mesoscale circulations forced by surface gradients of heating arising from irrigated areas adjacent to dry land, utilizing a combination of satellite, observational, and modeling approaches. ...

M. Segal; J. R. Garratt; R. A. Pielke; W. E. Schreiber; A. Rodi; G. Kallos; J. Weaver

1989-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

A Subtropical Oceanic Mesoscale Convective Vortex Observed during SoWMEX/TiMREX  

Science Conference Proceedings (OSTI)

This study examines a subtropical oceanic mesoscale convective vortex (MCV) that occurred from 1800 UTC 4 June to 1200 UTC 6 June 2008 during intensive observing period (IOP) 6 of the Southwest Monsoon Experiment (SoWMEX) and the Terrain-...

Hsiao-Wei Lai; Christopher A. Davis; Ben Jong-Dao Jou

2011-08-01T23:59:59.000Z

382

Inertial Instability and Mesoscale Convective Systems. part II. Symmetric CISK in a Baroclinic Flow  

Science Conference Proceedings (OSTI)

Numerous budget studies of organized persistent systems of convective clouds outside the tropics suggest that circulations of mesoscale proportions are important in supplying moisture to the convective clouds, though the dynamical nature of ...

Kerry A. Emanuel

1982-05-01T23:59:59.000Z

383

Global Variability of Mesoscale Convective System Anvil Structure from A-Train Satellite Data  

Science Conference Proceedings (OSTI)

Mesoscale convective systems (MCSs) in the tropics produce extensive anvil clouds, which significantly affect the transfer of radiation. This study develops an objective method to identify MCSs and their anvils by combining data from three A-...

Jian Yuan; Robert A. Houze Jr.

2010-11-01T23:59:59.000Z

384

Enhancement of Mesoscale Eddy Stirring at Steering Levels in the Southern Ocean  

E-Print Network (OSTI)

Meridional cross sections of effective diffusivity in the Southern Ocean are presented and discussed. The effective diffusivity, K[subscript eff], characterizes the rate at which mesoscale eddies stir properties on interior ...

Marshall, John C.

385

The Contribution of Mesoscale Convective Complexes to Rainfall across Subtropical South America  

Science Conference Proceedings (OSTI)

This study uses a database consisting of 330 austral warm-season (October–May) mesoscale convective complexes (MCCs) during 1998–2007 to determine the contribution of MCCs to rainfall across subtropical South America (SSA). A unique precipitation ...

Joshua D. Durkee; Thomas L. Mote; J. Marshall Shepherd

2009-09-01T23:59:59.000Z

386

Bottom-Enhanced Diapycnal Mixing Driven by Mesoscale Eddies: Sensitivity to Wind Energy Supply  

Science Conference Proceedings (OSTI)

It has been estimated that much of the wind energy input to the ocean general circulation is removed by mesoscale eddies via baroclinic instability. While the fate of this energy remains a subject of research, arguments have been presented ...

Geoff J. Stanley; Oleg A. Saenko

387

The Distinction between Large-Scale and Mesoscale Contribution to Severe Convection: A Case Study Example  

Science Conference Proceedings (OSTI)

Using a case study of a relatively modest severe weather event as an example, a framework for understanding the large-scale-mesoscale interaction is developed and discussed. Large-scale processes are limited, by definition, to those which are ...

Charles A. Doswell III

1987-03-01T23:59:59.000Z

388

Precipitation and Kinematic Structure of an Oceanic Mesoscale Convective System. Part I: Convective Line Structure  

Science Conference Proceedings (OSTI)

The precipitation, thermodynamic, and kinematic structure of an oceanic mesoscale convective system is studied using airborne Doppler and in situ (flight-level) data collected by the NOAA P-3 aircraft. The system, a well-organized, stationary, ...

David P. Jorgensen; Margaret A. LeMone; Ben Jong-Dao Jou

1991-11-01T23:59:59.000Z

389

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

390

A Practical Approach to Sequential Estimation of Systematic Error on Near-Surface Mesoscale Grids  

Science Conference Proceedings (OSTI)

Statistical analysis arguments are used to construct an estimation algorithm for systematic error of near-surface temperatures on a mesoscale grid. The systematic error is defined as the observed running-mean error, and an averaging length of 7 ...

Joshua P. Hacker; Daran L. Rife

2007-12-01T23:59:59.000Z

391

A Climatology of Midlatitude Mesoscale Convective Vortices in the Rapid Update Cycle  

Science Conference Proceedings (OSTI)

Climatological characteristics of mesoscale convective vortices (MCVs) occurring in the state of Oklahoma during the late spring and summer of four years are investigated. The MCV cases are selected based on vortex detection by an objective ...

Eric P. James; Richard H. Johnson

2010-05-01T23:59:59.000Z

392

Monitoring Mesoscale Convective Cloud Systems Associated with Heavy Storms Using Meteosat Imagery  

Science Conference Proceedings (OSTI)

In this study, an automatic algorithm for monitoring areas of cold cloud tops within mesoscale convective systems that produced floods in Greece is developed. The technique is based on Meteosat infrared and water vapor images. The purpose of the ...

Haralambos Feidas; Constantinos Cartalis

2001-03-01T23:59:59.000Z

393

Analysis of a Mesoscale Gravity Wave Event Using Empirical Orthogonal Functions  

Science Conference Proceedings (OSTI)

A method is detailed that filters mesoscale gravity wave signals from synoptic-level observation data using empirical orthogonal functions (EOFs). Similar EOF analyses have been used to study many oceanographic and meteorological features by ...

Steven T. Fiorino; James Correia Jr

2002-01-01T23:59:59.000Z

394

Observations of Height-dependent Pressure-Perturbation Structure of a Strong Mesoscale Gravity Wave  

Science Conference Proceedings (OSTI)

Airborne observations using a downward-looking, dual-frequency, near-infrared, differential absorption lidar (DIAL) system provide the first measurements of the height-dependent pressure-perturbation field associated with a strong mesoscale ...

David O'C. Starr; C. Laurence Korb; Geary K. Schwemmer; Chi Y. Weng

1992-12-01T23:59:59.000Z

395

Near-Real-Time Applications of a Mesoscale Analysis System to Complex Terrain  

Science Conference Proceedings (OSTI)

Several mesoscale data analysis systems are reviewed, of which one is then adapted and applied to the complex terrain of northwest Utah and the western United States. The analysis system relies on the simple, but computationally efficient, ...

Steven M. Lazarus; Carol M. Ciliberti; John D. Horel; Keith A. Brewster

2002-10-01T23:59:59.000Z

396

The Accuracy of Solar Irradiance Calculations Used in Mesoscale Numerical Weather Prediction  

Science Conference Proceedings (OSTI)

In this paper, solar irradiance forecasts made by mesoscale numerical weather prediction models are compared with observations taken during three air-quality experiments in various parts of the United States. The authors evaluated the fifth-...

Robert J. Zamora; Ellsworth G. Dutton; Michael Trainer; Stuart A. McKeen; James M. Wilczak; Yu-Tai Hou

2005-04-01T23:59:59.000Z

397

Forecasting the Maintenance of Mesoscale Convective Systems Crossing the Appalachian Mountains  

Science Conference Proceedings (OSTI)

Forecasting the maintenance of mesoscale convective systems (MCSs) is a unique problem in the eastern United States due to the influence of the Appalachian Mountains. At times these systems are able to traverse the terrain and produce severe ...

Casey E. Letkewicz; Matthew D. Parker

2010-08-01T23:59:59.000Z

398

Interactions between a Developing Mesoscale Convective System and Its Environment. Part I: Observational Analysis  

Science Conference Proceedings (OSTI)

This paper is the first in a two part series in which the interactions between a growing mesoscale convective system (MCS) and its surrounding environment are investigated. The system studied here developed in northeastern Colorado on 19 July ...

Jason E. Nachamkin; Ray L. McAnelly; William R. Cotton

2000-05-01T23:59:59.000Z

399

An Isentropic Meso?-Scale Analysis System and Its Sensitivity to Aircraft and Surface Observations  

Science Conference Proceedings (OSTI)

An objective analysis scheme for meteorological variables on constant potential temperature surfaces is presented. The analysis uses a form of multivariate statistical interpolation and is designed th retain mesoscale detail in disparate ...

Stanley G. Benjamin

1989-07-01T23:59:59.000Z

400

STATISTICAL MECHANICS MODELING OF MESOSCALE DEFORMATION IN METALS  

SciTech Connect

The research under this project focused on a theoretical and computational modeling of dislocation dynamics of mesoscale deformation of metal single crystals. Specifically, the work aimed to implement a continuum statistical theory of dislocations to understand strain hardening and cell structure formation under monotonic loading. These aspects of crystal deformation are manifestations of the evolution of the underlying dislocation system under mechanical loading. The project had three research tasks: 1) Investigating the statistical characteristics of dislocation systems in deformed crystals. 2) Formulating kinetic equations of dislocations and coupling these kinetics equations and crystal mechanics. 3) Computational solution of coupled crystal mechanics and dislocation kinetics. Comparison of dislocation dynamics predictions with experimental results in the area of statistical properties of dislocations and their field was also a part of the proposed effort. In the first research task, the dislocation dynamics simulation method was used to investigate the spatial, orientation, velocity, and temporal statistics of dynamical dislocation systems, and on the use of the results from this investigation to complete the kinetic description of dislocations. The second task focused on completing the formulation of a kinetic theory of dislocations that respects the discrete nature of crystallographic slip and the physics of dislocation motion and dislocation interaction in the crystal. Part of this effort also targeted the theoretical basis for establishing the connection between discrete and continuum representation of dislocations and the analysis of discrete dislocation simulation results within the continuum framework. This part of the research enables the enrichment of the kinetic description with information representing the discrete dislocation systems behavior. The third task focused on the development of physics-inspired numerical methods of solution of the coupled dislocation kinetics and crystal mechanics framework. To a large extent, this task has also been successfully started. We have developed a custom finite-element approach with mesh points being a subset of the underlying crystal structure. When used to predict the evolution of the dislocation system, the planar motion of dislocations is naturally captured for all slip systems, thus minimizing numerical errors and providing simple ways to investigate cross slip and dislocation reactions. Preliminary results in this direction show that we are closer than ever in building a predictive framework for dislocation dynamics and mesoscale plasticity based on the first principles of dislocation dynamics. The rest of the report gives and overview of the research performed under this project and highlights the key results and open questions left for future investigations.

Anter El-Azab

2013-04-08T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Deactivation of ice nuclei due to atmospherically relevant surface coatings  

SciTech Connect

The ice nucleation characteristics of Arizona Test Dust (ATD) and illite clay, surrogates for atmospheric ice nuclei, have been determined at the Aerosol Interactions and Dynamics in the Atmosphere (AIDA) chamber located at the Research Center Karlsruhe in Germany. The objective of this research was to determine the effect of sulphuric acid and ammonium sulphate coatings on the ability of these mineral dust surrogates to nucleate ice in an environment where particles realistically compete for water vapor. Coated ATD particles required higher saturations at all investigated temperatures, from -20 to -45º C, than did identical uncoated particles. Freezing of coated particles often required saturations approaching those for the homogeneous freezing of aqueous solutions of the coating material alone. Less pronounced effects were found for illite although the presence of a coating consistently increased the saturation or decreased the temperature required for ice formation. Analysis of ice residue at the single particle level suggests that the first coated particles to freeze had thinner or incomplete coatings when compared to particles that froze later in the expansion. This observation highlights a need to verify coating properties since an assumption of homogeneity of a group of coated aerosol may be incorrect. The increase in saturation ratio for freezing suggests that gas-phase uptake of sulphates, a large fraction of which are due to anthropogenic emissions, will reduce the ice and mixed-phase cloud formation potential of atmospheric ice nuclei.

Cziczo, Daniel J.; Froyd, Karl D.; Gallavardin, S. J.; Moehler, Ottmar; Benz, Stefan; Saathoff, Harald; Murphy, Daniel M.

2009-11-23T23:59:59.000Z

402

Interpreting Temperature Strain Data from Meso-Scale Clathrate Experiments  

Science Conference Proceedings (OSTI)

Gas hydrates are important in global climate change, carbon sequestra- tion, and seafloor stability. Currently, formation and dissociation pathways are poorly defined. We present a new approach for processing large amounts of data from meso-scale experiments, such as the LUNA distributed sensing system (DSS) in the seafloor process simulator (SPS) at Oak Ridge National Laboratory. The DSS provides a proxy for temperature measurement with a high spatial resolution allowing the heat of reaction during gas hydrate formation/dissociation to aid in locating clathrates in the vessel. The DSS fibers are placed in the sediment following an Archimedean spiral design and then the position of each sensor is solved by iterating over the arc length formula with Newtons method. The data is then gridded with 1 a natural neighbor interpolation algorithm to allow contouring of the data. The solution of the sensor locations is verified with hot and cold stimulus in known locations. An experiment was preformed with a vertically split column of sand and silt. The DSS system clearly showed hydrate forming in the sand first, then slowly creeping into the silt. Similar systems and data processing techniques could be used for monitoring of hydrates in natural environments or in any situation where a hybrid temperature/strain index is useful. Further ad- vances in fiber technology allow the fiber to be applied in any configuration and the position of each sensor to be precisely determined making practical applications easier.

Leeman, John R [ORNL; Rawn, Claudia J [ORNL; Ulrich, Shannon M [ORNL; Elwood Madden, Megan [University of Oklahoma, Norman; Phelps, Tommy Joe [ORNL

2012-01-01T23:59:59.000Z

403

Mesoscale assembly of NiO nanosheets into spheres  

SciTech Connect

NiO solid/hollow spheres with diameters about 100 nm have been successfully synthesized through thermal decomposition of nickel acetate in ethylene glycol at 200 deg. C. These spheres are composed of nanosheets about 3-5 nm thick. Introducing poly(vinyl pyrrolidone) (PVP) surfactant to reaction system can effectively control the products' morphology. By adjusting the quantity of PVP, we accomplish surface areas-tunable NiO assembled spheres from {approx}70 to {approx}200 m{sup 2} g{sup -1}. Electrochemical tests show that NiO hollow spheres deliver a large discharge capacity of 823 mA h g{sup -1}. Furthermore, these hollow spheres also display a slow capacity-fading rate. A series of contrastive experiments demonstrate that the surface area of NiO assembled spheres has a noticeable influence on their discharge capacity. - Graphical abstract: The mesoscale assembly of NiO nanosheets into spheres have been achieved by a solvothermal method. N{sub 2} adsorption/desorption isotherms show the S{sub BET} of NiO is tunable. NiO spheres show large discharge capacity and slow capacity-fading rate.

Zhang Meng, E-mail: meng_zhang@haut.edu.c [School of Materials Science and Engineering, Henan University of Technology, Zhengzhou, Henan 450007 (China); Yan Guojin; Hou Yonggai; Wang Chunhua [School of Materials Science and Engineering, Henan University of Technology, Zhengzhou, Henan 450007 (China)

2009-05-15T23:59:59.000Z

404

Mesoscale predictability of an extreme warm-season precipitation event  

E-Print Network (OSTI)

During the period of June 29 through July 6, 2002, an extreme precipitation event occurred over Texas, resulting in catastrophic flooding. Operational forecasts performed poorly, neither predicting the copious amounts of rain nor its longevity. The Penn State University/NCAR Mesoscale Model version 5 (MM5) was used to conduct predictability experiments, which follow closely to the research conducted by Zhang et al. A control simulation initialized at 00Z 1 July is established over a 30-km grid. First, practical predictability experiments are performed by exploring the impacts due to different lead-times, resolution dependence, and different physics parameterizations. Second, intrinsic predictability is investigated by inducing a random temperature perturbation in the initial conditions, followed by numerous simulations with various perturbed initializations. Similar results to those found by Zhang et al. were discovered here: the prominent initial error growth is associated with moist processes leading to convection. Eventually these errors grow from the convective scale to sub-synoptic scale, essentially below 1000 kilometers. This indicates that as the forecast time extends further beyond initialization, the resulting errors will impact forecasts of larger-scale features such as differences in the positioning and intensity of positive PV anomalies and distribution of precipitation from the control simulation.

Odins, Andrew Michael

2004-12-01T23:59:59.000Z

405

Mesoscale Convective Vortices in Multiscale, Idealized Simulations: Dependence on Background State, Interdependency with Moist Baroclinic Cyclones, and Comparison with BAMEX Observations  

Science Conference Proceedings (OSTI)

A set of multiscale, nested, idealized numerical simulations of mesoscale convective systems (MCSs) and mesoscale convective vortices (MCVs) was conducted. The purpose of these simulations was to investigate the dependence of MCV development and ...

Robert J. Conzemius; Michael T. Montgomery

2010-04-01T23:59:59.000Z

406

The Use of Satellite Imagery and Surface Pressure-Gradient Analysis Modified for Sloping Terrain to Analyze the Mesoscale Events Preceding the Severe Hailstorms of 2 August 1986  

Science Conference Proceedings (OSTI)

Conditions leading up to an outbreak of severe hailstorms in northeast Colorado are examined using satellite and surface data. A persistent mesoscale ridge of surface-high pressure, caused by outflow from a mesoscale- convective system, is seen ...

John F. Weaver; James J. Toth

1990-06-01T23:59:59.000Z

407

The Mesoscale Dynamics of Thin Tropical Tropopause Cirrus  

Science Conference Proceedings (OSTI)

Thin cirrus clouds in the tropical tropopause layer (TTL) are warmed through the absorption of infrared radiation. The response of the cloud and the surrounding atmosphere to this thermal forcing is investigated through linear theory and ...

Dale R. Durran; Tra Dinh; Marie Ammerman; Thomas Ackerman

2009-09-01T23:59:59.000Z

408

High-Resolution Satellite Imagery for Mesoscale Meteorological Studies  

Science Conference Proceedings (OSTI)

In this article high-resolution satellite imagery from a variety of meteorological and environmental satellites is compared. Digital datasets from Geostationary Operational Environmental Satellite (GOES), National Oceanic and Atmospheric ...

David B. Johnson; Pierre Flament; Robert L. Bernstein

1994-01-01T23:59:59.000Z

409

Mesoscale Weather Effects of Variable Snow Cover over Northeast Colorado  

Science Conference Proceedings (OSTI)

Data from the PROFS (Program for Regional Observing and Forecasting Services) surface mesonetwork have been used to document the effect of variable snow cover on atmospheric boundary layer properties cloudiness and weather conditions over north ...

Richard H. Johnson; George S. Young; James J. Toth; Raymond M. Zehr

1984-06-01T23:59:59.000Z

410

Validation of NWP Mesoscale Models with Swiss GPS Network AGNES  

Science Conference Proceedings (OSTI)

The importance of water vapor for the hydrological cycle of the earth and the atmosphere is well known but difficult to study and sample. In this respect, the vertically integrated water vapor (IWV) derived from global positioning system (GPS) ...

G. Guerova; E. Brockmann; J. Quiby; F. Schubiger; C. Matzler

2003-01-01T23:59:59.000Z

411

Mesoscale Modeling During Mixed-Phase Arctic Cloud Experiment  

SciTech Connect

Mixed-phase arctic stratus clouds are the predominant cloud type in the Arctic (Curry et al. 2000) and through various feedback mechanisms exert a strong influence on the Arctic climate. Perhaps one of the most intriguing of their features is that they tend to have liquid tops that precipitate ice. Despite the fact that this situation is colloidally unstable, these cloud systems are quite long lived - from a few days to over a couple of weeks. It has been hypothesized that mixed-phase clouds are maintained through a balance between liquid water condensation resulting from the cloud-top radiative cooling and ice removal by precipitation (Pinto 1998; Harrington et al. 1999). In their modeling study Harrington et al. (1999) found that the maintenance of this balance depends strongly on the ambient concentration of ice forming nucleus (IFN). In a follow-up study, Jiang et al. (2002), using only 30% of IFN concentration predicted by Meyers et al. (1992) IFN parameterization were able to obtain results similar to the observations reported by Pinto (1998). The IFN concentration measurements collected during the Mixed-Phase Arctic Cloud Experiment (M-PACE), conducted in October 2004 over the North Slope of Alaska and the Beaufort Sea (Verlinde et al. 2005), also showed much lower values then those predicted (Prenne, pers. comm.) by currently accepted ice nucleation parameterizations (e.g. Meyers et al. 1992). The goal of this study is to use the extensive IFN data taken during M-PACE to examine what effects low IFN concentrations have on mesoscale cloud structure and coastal dynamics.

Avramov, A.; Harringston, J.Y.; Verlinde, J.

2005-03-18T23:59:59.000Z

412

Mesoscale Wind Regimes in Chile at 30°S  

Science Conference Proceedings (OSTI)

In November of 1999, four permanent surface stations were installed in the vicinity of the surface ozone monitoring station on the summit of the Cerro Tololo (2200 m MSL) in Chile at 30°S. These stations were used to study the atmospheric flow ...

Norbert Kalthoff; Inge Bischoff-Gauß; Melitta Fiebig-Wittmaack; Franz Fiedler; Jutta Thürauf; Enrique Novoa; Clotilde Pizarro; Rubén Castillo; Laura Gallardo; Roberto Rondanelli; Martin Kohler

2002-09-01T23:59:59.000Z

413

GCM Grid-Scale Evaporation from Mesoscale Modeling  

Science Conference Proceedings (OSTI)

This paper investigates the problem of aggregation of land surface properties in a large area comparable in size with a model grid box of a GCM. The study is based on 3D numerical results obtained for atmospheric situations encountered during ...

J. Noilhan; P. Lacarrère

1995-02-01T23:59:59.000Z

414

The Impact of Oklahoma's Winter Wheat Belt on the Mesoscale Environment  

Science Conference Proceedings (OSTI)

Oklahoma Mesonet data were used to measure the impact of Oklahoma's winter wheat belt on the mesoscale environment from 1994 to 2001. Statistical analyses of monthly means of near-surface air temperatures demonstrated that 1) a well-defined cool ...

Renee A. McPherson; David J. Stensrud; Kenneth C. Crawford

2004-02-01T23:59:59.000Z

415

Real-Time Forecasting for the Antarctic: An Evaluation of the Antarctic Mesoscale Prediction System (AMPS)  

Science Conference Proceedings (OSTI)

In response to the need for improved weather prediction capabilities in support of the U.S. Antarctic Program’s field operations, the Antarctic Mesoscale Prediction System (AMPS) was implemented in October 2000. AMPS employs the Polar MM5, a ...

David H. Bromwich; Andrew J. Monaghan; Kevin W. Manning; Jordan G. Powers

2005-03-01T23:59:59.000Z

416

The Tilt of the Leading Edge of Mesoscale Tropical Convective Lines  

Science Conference Proceedings (OSTI)

The tilt with height of the leading edge of seven mesoscale convective lines in GATE is determined by two independent methods. When averaged over time and along the line axis, the tilt is found to he surprisingly shallow, between 20 and 35 ...

M. A. LeMone; G. M. Barnes; E. J. Szoke; E. J. Zipser

1984-03-01T23:59:59.000Z

417

Surface Mesoscale Features as Potential Storm Predictors in the Northern Great Plains—Two Case Studies  

Science Conference Proceedings (OSTI)

Two mesoscale case studies in the semi-arid climate of southeastern Montana were carried out on 1 May and 3 June 1980. I May was an unstable, rainy day with two rain periods over the mesonet area, and 3 June was a potentially unstable day, with a ...

AndréA. Doneaud; James R. Miller Jr.; David L. Priegnitz; Lakshmana Viswanath

1983-02-01T23:59:59.000Z

418

Dynamics and Prediction of a Mesoscale Extreme Rain Event in the Baiu Front over Kyushu, Japan  

Science Conference Proceedings (OSTI)

A high-resolution version of the limited-area primitive equations model of the Bureau of Meteorology Research Centre is used to investigate the dynamics and prediction of the mesoscale, extreme rain event of 1 August 1993 over Kyushu. The model ...

Noel E. Davidson; Kazuo Kurihara; Teruyuki Kato; Graham Mills; Kamal Puri

1998-06-01T23:59:59.000Z

419

The Synoptic Setting and Possible Energy Sources for Mesoscale Wave Disturbances  

Science Conference Proceedings (OSTI)

Thirteen case studies of mesoscale wave disturbances (characterized by either a singular wave of depression or wave packets with periods of 1–4 h, horizontal wavelengths of 50–500 km, and surface pressure perturbation amplitudes of 0.2–7.0 mb) ...

Louis W. Uccellini; Steven E. Koch

1987-03-01T23:59:59.000Z

420

Propagation of Wind Energy into the Deep Ocean through a Fully Turbulent Mesoscale Eddy Field  

Science Conference Proceedings (OSTI)

The authors analyze the 3D propagation of wind-forced near-inertial motions in a fully turbulent mesoscale eddy field with a primitive equation numerical model. Although the wind stress is uniform, the near-inertial motion field quickly becomes ...

Eric Danioux; Patrice Klein; Pascal Rivière

2008-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Mesoscale Moisture Transport by the Low-Level Jet during the IHOP Field Experiment  

Science Conference Proceedings (OSTI)

Previous studies of the low-level jet (LLJ) over the central Great Plains of the United States have been unable to determine the role that mesoscale and smaller circulations play in the transport of moisture. To address this issue, two aircraft ...

Edward I. Tollerud; Fernando Caracena; Steven E. Koch; Brian D. Jamison; R. Michael Hardesty; Brandi J. McCarty; Christoph Kiemle; Randall S. Collander; Diana L. Bartels; Steven Albers; Brent Shaw; Daniel L. Birkenheuer; W. Alan Brewer

2008-10-01T23:59:59.000Z

422

Mesoscale Lake-effect Snowstorms in the Vicinity of Lake Michigan: Linear Theory and Numerical Simulations  

Science Conference Proceedings (OSTI)

Mesoscale lake-effect snowstorms in the vicinity of Lake Michigan are studied by a linear steady-state analytic model and a nonlinear time-dependent numerical model with parameterized subgrid-scale physics. The solutions of the linear model show ...

Hsiao-ming Hsu

1987-04-01T23:59:59.000Z

423

Fabrication and redesign of a meso-scale six-axis nano-positioner system  

E-Print Network (OSTI)

The industry's need for low-cost nano-positioners led MIT's Precision Compliant Systems lab to design a system of 10 six-axis meso-scale nano-positioners. They devised a system that could revolutionize the nano-scale ...

Telleria, Maria J

2008-01-01T23:59:59.000Z

424

Mesoscale Energy Spectra of the Mei-Yu Front System. Part I: Kinetic Energy Spectra  

Science Conference Proceedings (OSTI)

The mesoscale kinetic energy (KE) spectra of the mei-yu front system are investigated through idealized numerical simulations. In the mature stage, the upper-tropospheric KE spectrum resembles a ?3 power law for wavelengths between 1000 and 400 km ...

Jun Peng; Lifeng Zhang; Yu Luo; Yun Zhang

2014-01-01T23:59:59.000Z

425

The Interaction between the Bottom Mixed layer and Mesoscale Motions of the Ocean: A Numerical Study  

Science Conference Proceedings (OSTI)

The interaction between a bottom mixed layer and a mesoscale eddy field is studied using a numerical model of a two-layer quasi-geostrophic fluid above a mixed layer. The height of the mixed layer is assumed to be restricted by stratification. A ...

K. J. Richards

1984-04-01T23:59:59.000Z

426

An Observational Study of Mesoscale Convective Systems with Heavy Rainfall over the Korean Peninsula  

Science Conference Proceedings (OSTI)

A heavy rainfall event induced by mesoscale convective systems (MCSs) occurred over the middle Korean Peninsula from 25 to 27 July 1996. This heavy rainfall caused a large loss of life and property damage as a result of flash floods and ...

Hyung Woo Kim; Dong Kyou Lee

2006-04-01T23:59:59.000Z

427

Mesoscale Budgets of Heat and Moisture in a Convective System over the Central United States  

Science Conference Proceedings (OSTI)

The effect midlatitude organized onvection on its environment is diagnosed through the calculation of mesoscale heat and moisture budgets over a region during the 10–11 April 1979 AYE-SESAME case. The noise level or error at individual points is ...

Ying-Hwa Kuo; Richard A. Anthes

1984-08-01T23:59:59.000Z

428

A Long-Lived Mesoscale Convective Complex. Part II: Evolution and Structure of the Mature Complex  

Science Conference Proceedings (OSTI)

An eight-day episode in August 1977 is described, wherein 14 mesoscale convective complexes (MCCs) developed in the central United States, including one to the immediate Ice of the Rocky Mountains on each day of the episode. In Part I of this ...

Peter J. Wetzel; William R. Cotton; Ray L. McAnelly

1983-10-01T23:59:59.000Z

429

Rigorous evaluation of a soil heat transfer model for mesoscale climate change impact studies  

Science Conference Proceedings (OSTI)

The influence of Climate Change on plant development as well as on carbon and nitrogen cycling in soils is an important research topic for Global Change impact assessment at the regional scale. These changes affect the availability and quality of ground ... Keywords: Energy balance, GLOWA-Danube, Land surface, Mesoscale, Soil temperature

Markus Muerth; Wolfram Mauser

2012-07-01T23:59:59.000Z

430

Surface Pressure and Precipitation Life Cycle Characteristics of PRE-STORM Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Extensive observations of the May–June 1985 Oklahoma–Kansas Preliminary Regional Experiment for STORM-Central (OK PRE-STORM) are used to examine the life cycle characteristics of 16 mesoscale convective systems (MCSs). The primary focus is on the ...

Scot M. Loehrer; Richard H. Johnson

1995-03-01T23:59:59.000Z

431

Impact of Improved Initialization of Mesoscale Features on Convective System Rainfall in 10-km Eta Simulations  

Science Conference Proceedings (OSTI)

A 10-km version of the NCEP Eta Model has been run over a roughly 1000 km × 1000 km domain centered over the upper Midwest for 20 cases where heavy warm season rainfall occurred from mesoscale convective systems to investigate the response of the ...

William A. Gallus Jr.; Moti Segal

2001-12-01T23:59:59.000Z

432

Numerical Simulation of the 1981 Sichuan Flood. Part I: Evolution of a Mesoscale Southwest Vortex  

Science Conference Proceedings (OSTI)

During the period 11–15 July 1981, heavy rainfall occurred over the Sichuan Basin in China, resulting in severe floods that took a large toll in human life and property damage. Mesoscale analyses by Kuo, Cheng and Anthes have shown that the flood ...

Ying-Hwa Kuo; Linsheng Cheng; Jian-Wen Bao

1988-12-01T23:59:59.000Z

433

Evolution and Structure of the 6–7 May 1985 Mesoscale Convective System and Associated Vortex  

Science Conference Proceedings (OSTI)

Observations collected during the Oklahoma–Kansas PRE-STORM experiment are used to document the evolution and structure of the mesoscale convective system (MCS) that occurred on 6–7 May 1985. The storm began when a short squall line developed in ...

Edward A. Brandes

1990-01-01T23:59:59.000Z

434

The Precipitation Life Cycle of Mesoscale Convective Complexes over the Central United States  

Science Conference Proceedings (OSTI)

The mesoscale convective complex (MCC) is a common and particularly well-organized class of meso-&? scale storm systems over the central United States. As observed by infrared (IR) satellite, the typical MCC's 10–12 h evolution displays a fairly ...

Ray L. McAnelly; William R. Cotton

1989-04-01T23:59:59.000Z

435

Mesoscale Model Simulation of the 4–5 January 1995 Lake-Effect Snowstorm  

Science Conference Proceedings (OSTI)

The Pennsylvania State University–NCAR Mesoscale Model version 5 (MM5), running on a triply nested grid, was used to simulate the intense lake-effect snowstorm of 4–5 January 1995. On the finest grid (5-km resolution) centered over Lake Ontario, ...

Robert J. Ballentine; Alfred J. Stamm; Eugene E. Chermack; Gregory P. Byrd; Donald Schleede

1998-12-01T23:59:59.000Z

436

Recognition of Negative Mesoscale Factors for Severe-Weather Potential: A Case Study  

Science Conference Proceedings (OSTI)

The case of 7–8 June 1998 in eastern New Mexico and western Texas is used to illustrate the challenge of recognizing possible negative effects created by mesoscale processes. In this case, a region of cloud-covered cool air (which was associated ...

Charles A. Doswell III; Donald V. Baker; Charlie A. Liles

2002-10-01T23:59:59.000Z

437

A Rapidly Deployable Operational Mesoscale Modeling System for Emergency-Response Applications  

Science Conference Proceedings (OSTI)

An operational mesoscale model–based forecasting system has been developed for use by U.S. Army Test and Evaluation Command meteorologists in their support of test-range operations. This paper reports on the adaptation of this system to permit ...

Thomas T. Warner; James F. Bowers; Scott P. Swerdlin; Brian A. Beitler

2004-05-01T23:59:59.000Z

438

Evaluation of a Mesoscale Model with Different Surface Parameterizations and Vertical Resolutions for the Bay of Valencia  

Science Conference Proceedings (OSTI)

Two different setups of the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) are used and the results of 71 forecasts are evaluated with a focus on the accuracy of meteorological surface data including wind, temperature, ...

Hinnerk Ries; K. Heinke Schlünzen

2009-08-01T23:59:59.000Z

439

A Study of Cyclone Mesoscale Structure with Emphasis on a Large-Amplitude Inertia–Gravity Wave  

Science Conference Proceedings (OSTI)

An analysis is presented of prominent mesoscale structure in a moderately intense cyclone with emphasis on a long-lived, large-amplitude inertia–gravity wave (IGW) that moved through the northeastern United States on 4 January 1994. Available ...

Lance F. Bosart; W. Edward Bracken; Anton Seimon

1998-06-01T23:59:59.000Z

440

Transformed Shoreline-following Horizontal Coordinates in a Mesoscale Model: A Sea?Land-Breeze Case Study  

Science Conference Proceedings (OSTI)

A hydrostatic and incompressible mesoscale model with transformed horizontal coordinates is presented. The model is applied to study the sea-land-breeze circulation over Río de La Plata. One of the new coordinates is shoreline-following and the ...

Guillermo J. Berri; Mario N. Nuñez

1993-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Spatial and Temporal Variations in Mesoscale Water Vapor Retrieved from TOVS Infrared Radiances in a Nocturnal Inversion Situation  

Science Conference Proceedings (OSTI)

Mesoscale moisture fields are retrieved from TOVS (TIROS Operational Vertical Sounder) infrared radiances from two polar-orbiting satellites. A special feature of the retrieval process is the determination of the surface skin temperature ...

Donald W. Hillger

1984-05-01T23:59:59.000Z

442

Analysis of Mesoscale Airflow Patterns in the South-Central Coast Air Basin during the SCCCAMP 1985 Intensive Measurement Periods  

Science Conference Proceedings (OSTI)

An analysis of the mesoscale airflow patterns in the south-central coast air basin (SCCAB) was performed using data collected during the 1985 South-Central Coast Cooperative Aerometric Monitoring Program (SCCCAMP). Airflow within the SCCAB is ...

Sharon G. Douglas; Robert C. Kessler

1991-05-01T23:59:59.000Z

443

Synoptic-Scale and Mesoscale Environments Conducive to Forest Fires during the October 2003 Extreme Fire Event in Southern California  

Science Conference Proceedings (OSTI)

This study has employed both observational data and numerical simulation results to diagnose the synoptic-scale and mesoscale environments conducive to forest fires during the October 2003 extreme fire event in southern California. A three-stage ...

Chenjie Huang; Y-L. Lin; M. L. Kaplan; J. J. Charney

2009-03-01T23:59:59.000Z

444

UNIWIPP: A University of Illinois Field Experiment to Investigate the Structure of Mesoscale Precipitation in Winter Storms  

Science Conference Proceedings (OSTI)

To obtain a better understanding of the role of synoptic-scale disturbances in organizing masoscale precipitation in the midwestern United States during the winter season, and to address scientific issues regarding mesoscale dynamics of winter ...

Mohan K. Ramamurthy; Robert M. Rauber; Brian P. Collins; Michael T. Shields; Patrick C. Kennedy; Wallace L. Clark

1991-06-01T23:59:59.000Z

445

Investigations of a Winter Mountain Storm in Utah. Part I: Synoptic Analyses, Mesoscale Kinematics, and Water Release Rates  

Science Conference Proceedings (OSTI)

A winter storm passing across the north–south-orientated Tushar Mountains in southwest Utah is investigated in this multipart paper. This Part I describes the evolving synoptic pattern, mesoscale kinematics, and calculated water release rates (...

Alexis B. Long; Arlen W. Huggins; Bernard A. Campistron

1990-06-01T23:59:59.000Z

446

An Intense, Quasi-Steady Thunderstorm over Mountainous Terrain. Part I: Evolution of the Storm-Initiating Mesoscale Circulation  

Science Conference Proceedings (OSTI)

A detailed, multisensor case study of mesoscale convective storms occurring in summer over the central and eastern Colorado Rockies is presented. This case study uses data obtained during the 1977 South Park Area Cumulus Experiment (SPACE) from ...

W. R. Cotton; R. L. George; K. R. Knupp

1982-02-01T23:59:59.000Z

447

Comparing the Convective Structure and Microphysics in Two Sahelian Mesoscale Convective Systems: Radar Observations and CRM Simulations  

Science Conference Proceedings (OSTI)

Two mesoscale convective systems (MCSs) observed during the African Monsoon Multidisciplinary Analyses (AMMA) experiment are simulated using the three-dimensional (3D) Goddard Cumulus Ensemble model. This study was undertaken to determine the ...

Nick Guy; Xiping Zeng; Steven A. Rutledge; Wei-Kuo Tao

2013-02-01T23:59:59.000Z

448

Comparison between Low-Flash and Non-Lightning-Producing Convective Areas within a Mature Mesoscale Convective System  

Science Conference Proceedings (OSTI)

Two small multicellular convective areas within a larger mesoscale convective system that occurred on 20 June 2004 were examined to assess vertical motion, radar reflectivity, and dual-polarimetric signatures between flash and non-flash-producing ...

Jennifer L. Palucki; Michael I. Biggerstaff; Donald R. MacGorman; Terry Schuur

2011-08-01T23:59:59.000Z

449

Electrification of Stratiform Regions in Mesoscale Convective Systems. Part II: Two-Dimensional Numerical Model Simulations of a Symmetric MCS  

Science Conference Proceedings (OSTI)

Model simulations of a symmetric mesoscale convective system (MCS; observations discussed in Part I) were conducted using a 2D, time-dependent numerical model with bulk microphysics. A number of charging mechanisms were considered based on ...

Terry J. Schuur; Steven A. Rutledge

2000-07-01T23:59:59.000Z

450

The Use and Analysis of Profiler Winds to Derive Mesoscale Height and Temperature Fields: Simulation and Real-Data Experiments  

Science Conference Proceedings (OSTI)

Conventional synoptic rawinsonde data do not have a fine enough temporal or spatial resolution to accurately resolve mesoscale features. Profiling networks are one potential source of these data although they provide only wind information. A ...

Jennifer M. Cram; Michael L. Kaplan; Craig A. Mattocks; John W. Zack

1991-04-01T23:59:59.000Z

451

Simulation of a Serial Upstream-Propagating Mesoscale Convective System Event over Southeastern South America Using Composite Initial Conditions  

Science Conference Proceedings (OSTI)

Serial upstream-propagating mesoscale convective system (MCS) events over southeastern South America are important contributors to the local hydrologic cycle as they can provide roughly half of the total monthly summer precipitation. However, the ...

Vagner Anabor; David J. Stensrud; Osvaldo L. L. de Moraes

2009-07-01T23:59:59.000Z

452

A Mesoscale Gravity-Wave Event Observed during CCOPE. Part IV: Stability Analysis and Doppler-derived Wave Vertical Structure  

Science Conference Proceedings (OSTI)

This paper summarizes the results of a detailed study from the Cooperative Convective Precipitation Experiment (CCOPE) of the vertical structure of mesoscale gravity waves that disturbed a sizable part of the troposphere and that played a ...

Steven E. Koch; F. Einaudi; Paul B. Dorian; Stephen Lang; Gerald M. Heymsfield

1993-09-01T23:59:59.000Z

453

Correction of Radar QPE Errors for Non-Uniform VPRs in Mesoscale Convective Systems Using TRMM Observations  

Science Conference Proceedings (OSTI)

Mesoscale Convective Systems (MCSs) contain both regions of convective and stratiform precipitation, and a bright band (BB) is often found in the stratiform region. Inflated reflectivity intensities in the BB often cause positive biases in radar ...

Youcun Qi; Jian Zhang; Qing Cao; Yang Hong; Xiao-Ming Hu

454

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

455

The Real-Time Mesoscale Analysis at NOAA’s National Centers for Environmental Prediction: Current Status and Development  

Science Conference Proceedings (OSTI)

In 2006, the National Centers for Environmental Prediction (NCEP) implemented the Real-Time Mesoscale Analysis (RTMA) in collaboration with the Earth System Research Laboratory and the National Environmental, Satellite, and Data Information ...

Manuel S. F. V. De Pondeca; Geoffrey S. Manikin; Geoff DiMego; Stanley G. Benjamin; David F. Parrish; R. James Purser; Wan-Shu Wu; John D. Horel; David T. Myrick; Ying Lin; Robert M. Aune; Dennis Keyser; Brad Colman; Greg Mann; Jamie Vavra

2011-10-01T23:59:59.000Z

456

Oceanic Cyclogenesis as Induced by a Mesoscale Convective System Moving Offshore. Part I: A 90-h Real-Data Simulation  

Science Conference Proceedings (OSTI)

Recent observations have revealed that some mesoscale convective systems (MCSs) could undergo multiple cycles of convective development and dissipation, and, under certain environments, they appeared to be responsible for (barotropic) oceanic or ...

Da-Lin Zhang; Ning Bao

1996-07-01T23:59:59.000Z

457

Mesoscale Convective Systems over Southeastern South America and Their Relationship with the South American Low-Level Jet  

Science Conference Proceedings (OSTI)

Prior studies have shown that the low-level jet is a recurrent characteristic of the environment during the initiation and mature stages of mesoscale convective systems (MCSs) over the Great Plains of the United States. The South American low-...

Paola Salio; Matilde Nicolini; Edward J. Zipser

2007-04-01T23:59:59.000Z

458

An Evaluation of Microphysics Fields from Mesoscale Model Simulations of Tropical Cyclones. Part I: Comparisons with Observations  

Science Conference Proceedings (OSTI)

This study presents a framework for comparing hydrometeor and vertical velocity fields from mesoscale model simulations of tropical cyclones with observations of these fields from a variety of platforms. The framework is based on the Yuter and ...

Robert F. Rogers; Michael L. Black; Shuyi S. Chen; Robert A. Black

2007-06-01T23:59:59.000Z

459

Contribution of Mesoscale Convective Complexes to Rainfall in Sahelian Africa: Estimates from Geostationary Infrared and Passive Microwave Data  

Science Conference Proceedings (OSTI)

The contribution of mesoscale convective complexes to the July–September rainfall in Sahelian Africa is assessed using passive microwave data from the Special Sensor Microwave Image and infrared (IR) data from the European Geostationary ...

Arlene G. Laing; J. Michael Fritsch; Andrew J. Negri

1999-07-01T23:59:59.000Z

460

Development and Evaluation of a Coupled Photosynthesis-Based Gas Exchange Evapotranspiration Model (GEM) for Mesoscale Weather Forecasting Applications  

Science Conference Proceedings (OSTI)

Current land surface schemes used for mesoscale weather forecast models use the Jarvis-type stomatal resistance formulations for representing the vegetation transpiration processes. The Jarvis scheme, however, despite its robustness, needs ...

Dev Niyogi; Kiran Alapaty; Sethu Raman; Fei Chen

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" 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

Teaching Mesoscale Meteorology in the Age of the Modernized National Weather Service: A Report on the Unidata/COMET Workshop  

Science Conference Proceedings (OSTI)

This report summarizes discussions that took place during a Unidata Cooperative Program for Operational Meteorology, Education, and Training (COMET) workshop on Mesoscale Meteorology Instruction in the Age of the Modernized Weather Service. The ...

Mohan K. Ramamurthy; Charles Murphy; James Moore; Melanie Wetzel; David Knight; Paul Ruscher; Steve Mullen; Russel DeSouza; Denise S. Hawk; David Fulker

1995-12-01T23:59:59.000Z

462

Microphysical and Thermodynamic Structure and Evolution of the Trailing Stratiform Regions of Mesoscale Convective Systems during BAMEX. Part I: Observations  

Science Conference Proceedings (OSTI)

This study used airborne and ground-based radar and optical array probe data from the spiral descent flight patterns and horizontal flight legs of the NOAA P-3 aircraft in the trailing stratiform regions (TSRs) of mesoscale convective systems (...

Andrea M. Smith; Greg M. McFarquhar; Robert M. Rauber; Joseph A. Grim; Michael S. Timlin; Brian F. Jewett; David P. Jorgensen

2009-04-01T23:59:59.000Z

463

Numerical Simulations of the Postsunrise Reorganization of a Nocturnal Mesoscale Convective System during 13 June IHOP_2002  

Science Conference Proceedings (OSTI)

A convection-permitting numerical model is used to simulate the postsunrise reorganization of a nocturnal mesoscale convective system (MCS) observed over western and central Oklahoma on 13 June 2002 during the International H2O (IHOP_2002) Field ...

Stanley B. Trier; John H. Marsham; Christopher A. Davis; David A. Ahijevych

2011-12-01T23:59:59.000Z

464

Numerical Study of an Observed Orogenic Mesoscale Convective System. Part 1: Simulated Genesis and Comparison with Observations  

Science Conference Proceedings (OSTI)

The interaction of topographically induced thermally and mechanically driven diurnal flow regimes in the lee of the Rockies is shown to lead to the growth of a mesoscale convective system (MCS). An organic MCS observed during the 1977 combined ...

Gregory J. Tripoli; William R. Cotton

1989-02-01T23:59:59.000Z

465

Probabilistic Evaluation of the Dynamics and Predictability of the Mesoscale Convective Vortex of 10–13 June 2003  

Science Conference Proceedings (OSTI)

This study examines the dynamics and predictability of the mesoscale convective vortex (MCV) of 10–13 June 2003 through ensemble forecasting. The MCV of interest developed from a preexisting upper-level disturbance over the southwest United ...

Daniel P. Hawblitzel; Fuqing Zhang; Zhiyong Meng; Christopher A. Davis

2007-04-01T23:59:59.000Z

466

The Life Cycle of a Mesoscale Gravity Wave as Observed by a Network of Doppler Wind Profilers  

Science Conference Proceedings (OSTI)

For the first time, an analysis has been made of the evolving vertical structure of a long-lived mesoscale gravity wave that exerted a strong influence upon the precipitation distribution across a large area. This paper describes this gravity ...

C. Michael Trexler; Steven E. Koch

2000-07-01T23:59:59.000Z

467

Tests of an Ensemble Kalman Filter for Mesoscale and Regional-Scale Data Assimilation. Part II: Imperfect Model Experiments  

Science Conference Proceedings (OSTI)

In Part I of this two-part work, the feasibility of using an ensemble Kalman filter (EnKF) for mesoscale and regional-scale data assimilation through various observing system simulation experiments was demonstrated assuming a perfect forecast ...

Zhiyong Meng; Fuqing Zhang

2007-04-01T23:59:59.000Z

468

Resolved turbulence characteristics in large-eddy simulations nested within mesoscale simulations using the Weather Research and Forecasting model  

Science Conference Proceedings (OSTI)

One-way concurrent nesting within the Weather Research and Forecasting (WRF) model is examined for conducting large-eddy simulations (LES) nested within mesoscale simulations. Wind speed, spectra, and resolved turbulent stresses and turbulence ...

Jeff Mirocha; Branko Kosovi?; Gokhan Kirkil

469

Feasibility of the Direct Method to Solve the Anelastic Pressure Equation in Nonhydrostatic Two-Dimensional Mesoscale Models  

Science Conference Proceedings (OSTI)

For anelastic nonhydrostatic mesoscale models, the pressure has to be solved from the Poisson partial differential equation. This can be done in various ways. Here the usually neglected direct method is compared to widely used (iterative) ...

Antoon Meesters

1992-10-01T23:59:59.000Z

470

Assessing Advances in the Assimilation of Radar Data and Other Mesoscale Observations within a Collaborative Forecasting–Research Environment  

Science Conference Proceedings (OSTI)

The impacts of assimilating radar data and other mesoscale observations in real-time, convection-allowing model forecasts were evaluated during the spring seasons of 2008 and 2009 as part of the Hazardous Weather Test Bed Spring Experiment ...

John S. Kain; Ming Xue; Michael C. Coniglio; Steven J. Weiss; Fanyou Kong; Tara L. Jensen; Barbara G. Brown; Jidong Gao; Keith Brewster; Kevin W. Thomas; Yunheng Wang; Craig S. Schwartz; Jason J. Levit

2010-10-01T23:59:59.000Z

471

Momentum Flux Spectrum of Convective Gravity Waves. Part I: An Update of a Parameterization Using Mesoscale Simulations  

Science Conference Proceedings (OSTI)

The convective source and momentum flux spectra of a parameterization of convective gravity wave drag (GWDC) are validated in a three-dimensional spectral space using mesoscale numerical simulations for various ideal and real convective storms. ...

Hyun-Joo Choi; Hye-Yeong Chun

2011-04-01T23:59:59.000Z

472

Electrification of Stratiform Regions in Mesoscale Convective Systems. Part I: An Observational Comparison of Symmetric and Asymmetric MCSs  

Science Conference Proceedings (OSTI)

The kinematic, microphysical, and electrical structures of two mesoscale convective systems (MCSs) observed during the 1991 Cooperative Oklahoma Profiler Studies (COPS91) experiment are analyzed. Profiles of the vertical electric field structure ...

Terry J. Schuur; Steven A. Rutledge

2000-07-01T23:59:59.000Z

473

The Impact of GPS Precipitable Water Assimilation on Mesoscale Model Retrievals of Orographic Rainfall during SALPEX'96  

Science Conference Proceedings (OSTI)

The potential of GPS precipitable water (PW) to improve mesoscale model retrievals of orographic precipitation is investigated for a prolonged rainfall event observed during the 1996 Southern Alps Experiment (SALPEX'96). The model is the Advanced ...

Mark Falvey; John Beavan

2002-12-01T23:59:59.000Z

474

Numerical Sensitivity Experiments of Varying Model Physics on the Structure, Evolution and Dynamics of Two Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

The effects of different model physics and different convective and boundary layer parameterization schemes are investigated using an 18-h nested-grid numerical simulation of the mesoscale convective systems (MCSs) that were responsible for the ...

Da-Lin Zhang; J. Michael Fritsch

1988-01-01T23:59:59.000Z

475

An Evaluation of Observations from Satellites for the Study and Prediction of Mesoscale Events and Cyclone Events  

Science Conference Proceedings (OSTI)

Quantitative observational guidelines have been developed for the study and forecasting of mesoscale events and cyclone events; many of these guidelines have resulted from major meteorological field programs. Increasingly sophisticated satellite-...

William E. Shenk; Thomas H. Vonder Haar; William L. Smith

1987-01-01T23:59:59.000Z

476

Impact of a Newtonian Assimilation and Physical Initialization an the Initialization and Prediction by a Tropical Mesoscale Model  

Science Conference Proceedings (OSTI)

This study illustrates the capability of Newtonian nudging and physical initialization in improving the initialized state and forecasts in the Florida State University high-resolution regional tropical mesoscale model. In particular it is shown ...

Kok-Seng Yap

1995-03-01T23:59:59.000Z

477

Mesoscale Temperature Fluctuations Induced by a Spectrum of Gravity Waves: A Comparison of Parameterizations and Their Impact on Stratospheric Microphysics  

Science Conference Proceedings (OSTI)

Power spectral densities (PSDs) of mesoscale fluctuations of temperature and rate of change of temperature (heating–cooling rate) due to a spectrum of stratospheric gravity waves are derived using canonical spectral forms based on observations ...

Julio T. Bacmeister; Stephen D. Eckermann; Athanasios Tsias; Kenneth S. Carslaw; Thomas Peter

1999-06-01T23:59:59.000Z

478

Mesoscale Modeling of Springtime Arctic Mixed-Phase Stratiform Clouds Using a New Two-Moment Bulk Microphysics Scheme  

Science Conference Proceedings (OSTI)

A new two-moment bulk microphysics scheme is implemented into the polar version of the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) to simulate arctic mixed-phase boundary layer stratiform clouds observed during ...

H. Morrison; J. O. Pinto

2005-10-01T23:59:59.000Z

479

Aerosol–Cloud Interactions in a Mesoscale Model. Part I: Sensitivity to Activation and Collision–Coalescence  

Science Conference Proceedings (OSTI)

High-resolution numerical simulations of the aerosol–cloud feedbacks are performed with a mesoscale model. The multimodal aerosol species, added to the model, and the cloud species were represented by two spectral moments. The aerosol sources ...

Irena T. Ivanova; Henry G. Leighton

2008-02-01T23:59:59.000Z

480

Mesoscale Conditions for the Severe Convection of 3 April 1974 in the East-Central United States  

Science Conference Proceedings (OSTI)

Hourly surface observations from more than 200 stations, together with routine radar and rawinsonde data, are used to elucidate the mesoscale conditions for the extraordinarily widespread severe convection in the central United States on 3 April ...

Dennis A. Miller; Frederick Sanders

1980-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "karlsruhe atmospheric mesoscale" from the National Library of EnergyBeta (NLEBeta).
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481

Water mass transformation due to mixed layer entrainment and mesoscale stirring: In series or parallel?  

E-Print Network (OSTI)

The convergence of advective and di#usive buoyancy flux must match the air-sea buoyancy flux between two outcropping isopycnals. This leads to a diagnostic framework for water mass transformation in which a myriad of di#erent processes can be incorporated under a unifying balance. We review how the diapycnal advection due to ubiquitous mixed layer entrainment can be included in this framework, and we estimate its contribution to the large scale transformation. We also consider how decomposing the flow and buoyancy field into mean, eddy and turbulent parts leads to clarifying the interaction of mixed layer and mesoscale (or sub-mesoscale) eddies in the overall large scale balance. 1.

A. Tandon

2001-01-01T23:59:59.000Z

482

The Influence of the Rocky Mountain on the 13–14 April 1986 Severe Weather Outbreak. Part I: Mesoscale Lee Cyclogenesis and Its Relationship to Severe Weather and Dust Storms  

Science Conference Proceedings (OSTI)

In this first of a two paper series, a sequence of dynamical processes involving the evolution of a mesoscale Ice cyclone and its subsequent interaction with a mesoscale tropopause fold downstream of the Rocky Mountains is investigated. These ...

V. Mohan Karyampudi; Michael L. Kaplan; Steven E. Koch; Robert J. Zamora

1995-05-01T23:59:59.000Z

483

A meso-scale unit-cell based material model for the single-ply flexible-fabric armor M. Grujicic a,*, W.C. Bell a  

E-Print Network (OSTI)

A meso-scale unit-cell based material model for the single-ply flexible-fabric armor M. Grujicic a April 2008 Accepted 12 February 2009 Available online 20 February 2009 Keywords: Flexible armor Meso-scale unit-cell based material model for a prototypical plain-woven single-ply flexible armor is developed

Grujicic, Mica

484

The Intensification of the Low-Level Jet during the Development of Mesoscale Convective Systems on a Mei-Yu Front  

Science Conference Proceedings (OSTI)

During the period of 21–25 June 1991, a mei-yu front, observed by the post–Taiwan Area Mesoscale Experiment, produced heavy precipitation along the western side of the Central Mountain Range of Taiwan. Several oceanic mesoscale convective systems ...

Chaing Chen; Wei-Kuo Tao; Pay-Liam Lin; George S. Lai; S-F. Tseng; Tai-Chi Chen Wang

1998-02-01T23:59:59.000Z

485

Numerical Simulation of the Effects of St. Louis on Mesoscale Boundary-Layer Airflow and Vertical Air Motion: Simulations of Urban vs Non-Urban Effects  

Science Conference Proceedings (OSTI)

A three-dimensional mesoscale computer model is used to assess the importance of urban effects, relative to non-urban effects, on mesoscale boundary-layer vertical air motion and on the height of the boundary layer downwind of St. Louis, ...

Mark R. Hjelmfelt

1982-09-01T23:59:59.000Z

486

A Summertime Antarctic Mesocyclone Event over the Southern Pacific during FROST SOP-3: A Mesoscale Analysis Using AVHRR, SSM/I, ERS, and Numerical Model Data  

Science Conference Proceedings (OSTI)

The development of three summertime mesoscale cyclones (MCs) over the northern Amundsen and Bellingshausen Seas from 10 to 12 January 1995 (during FROST SOP-3) is studied by means of AVHRR data, ERS and SSM/I retrievals, and mesoscale numerical ...

Michael Lieder; Günther Heinemann

1999-12-01T23:59:59.000Z

487

Simulating atmosphere flow for wind energy applications with WRF-LES  

SciTech Connect

Forecasts of available wind energy resources at high spatial resolution enable users to site wind turbines in optimal locations, to forecast available resources for integration into power grids, to schedule maintenance on wind energy facilities, and to define design criteria for next-generation turbines. This array of research needs implies that an appropriate forecasting tool must be able to account for mesoscale processes like frontal passages, surface-atmosphere interactions inducing local-scale circulations, and the microscale effects of atmospheric stability such as breaking Kelvin-Helmholtz billows. This range of scales and processes demands a mesoscale model with large-eddy simulation (LES) capabilities which can also account for varying atmospheric stability. Numerical weather prediction models, such as the Weather and Research Forecasting model (WRF), excel at predicting synoptic and mesoscale phenomena. With grid spacings of less than 1 km (as is often required for wind energy applications), however, the limits of WRF's subfilter scale (SFS) turbulence parameterizations are exposed, and fundamental problems arise, associated with modeling the scales of motion between those which LES can represent and those for which large-scale PBL parameterizations apply. To address these issues, we have implemented significant modifications to the ARW core of the Weather Research and Forecasting model, including the Nonlinear Backscatter model with Anisotropy (NBA) SFS model following Kosovic (1997) and an explicit filtering and reconstruction technique to compute the Resolvable Subfilter-Scale (RSFS) stresses (following Chow et al, 2005).We are also modifying WRF's terrain-following coordinate system by implementing an immersed boundary method (IBM) approach to account for the effects of complex terrain. Companion papers presenting idealized simulations with NBA-RSFS-WRF (Mirocha et al.) and IBM-WRF (K. A. Lundquist et al.) are also presented. Observations of flow through the Altamont Pass (Northern California) wind farm are available for validation of the WRF modeling tool for wind energy applications. In this presentation, we use these data to evaluate simulations using the NBA-RSFS-WRF tool in multiple configurations. We vary nesting capabilities, multiple levels of RSFS reconstruction, SFS turbulence models (the new NBA turbulence model versus existing WRF SFS turbulence models) to illustrate the capabilities of the modeling tool and to prioritize recommendations for operational uses. Nested simulations which capture both significant mesoscale processes as well as local-scale stable boundary layer effects are required to effectively predict available wind resources at turbine height.

Lundquist, J K; Mirocha, J D; Chow, F K; Kosovic, B; Lundquist, K A

2008-01-14T23:59:59.000Z

488

Mesoscale modeling of irreversible volume growth in powders of anisotropic crystals  

Science Conference Proceedings (OSTI)

Careful thermometric analysis (TMA) on powders of micron-sized triamino-trinitrobenzene (TATB) crystallites are shown to display irreversible growth in volume when subjected to repeated cycles of heating and cooling. Such behavior is counter-intuitive to typical materials response to simulated annealing cycles in atomic-scale molecular dynamics. However, through coarse-grained simulations using a mesoscale Hamiltonian we quantitatively reproduce irreversible growth behavior in such powdered material. We demonstrate that irreversible growth happens only in the presence of intrinsic crystalline anisotropy, and is mediated by particles much smaller than the average crystallite size.

Gee, R; Maiti, A; Fried, L

2006-05-05T23:59:59.000Z

489

Implementation and assessment of turbine wake models in the Weather Research and Forecasting model for both mesoscale and large-eddy simulation  

SciTech Connect

Flow dynamics in large wind projects are influenced by the turbines located within. The turbine wakes, regions characterized by lower wind speeds and higher levels of turbulence than the surrounding free stream flow, can extend several rotor diameters downstream, and may meander and widen with increasing distance from the turbine. Turbine wakes can also reduce the power generated by downstream turbines and accelerate fatigue and damage to turbine components. An improved understanding of wake formation and transport within wind parks is essential for maximizing power output and increasing turbine lifespan. Moreover, the influence of wakes from large wind projects on neighboring wind farms, agricultural activities, and local climate are all areas of concern that can likewise be addressed by wake modeling. This work describes the formulation and application of an actuator disk model for studying flow dynamics of both individual turbines and arrays of turbines within wind projects. The actuator disk model is implemented in the Weather Research and Forecasting (WRF) model, which is an open-source atmospheric simulation code applicable to a wide range of scales, from mesoscale to large-eddy simulation. Preliminary results demonstrate the applicability of the actuator disk model within WRF to a moderately high-resolution large-eddy simulation study of a small array of turbines.

Singer, M; Mirocha, J; Lundquist, J; Cleve, J

2010-03-03T23:59:59.000Z

490

The Boulder Atmospheric Observatory  

Science Conference Proceedings (OSTI)

The Boulder Atmospheric Observatory (BAO) is a unique research facility for studying the planetary boundary layer and for testing and calibrating atmospheric sensors. The facility includes a 300 m tower instrumented with fast- and slow-response ...

J. C. Kaimal; J. E. Gaynor

1983-05-01T23:59:59.000Z

491

Atmospheric Radiation Measurement Program  

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

Atmospheric Observatory (UAO) Pilot Experiment at NYC" - Michael Reynolds, BNL 17:30 "EML Pilot Studies for the Urban Atmospheric Observatory" - Hsi-Na (Sam) Lee, EML 17:40 "A...

492

The Generation and Propagation of a Nocturnal Squall Line. Part I: Observations and Implications for Mesoscale Predictability  

Science Conference Proceedings (OSTI)

The initiation and forcing of a squall line on 26–27 May 1985 near Wichita, Kansas is examined. The squall line is secondary convection in the sense that it is preceded in the diurnal cycle by other mesoscale convective systems. The squall fine ...

R. E. Carbone; J. W. Conway; N. A. Crook; M. W. Moncrieff

1990-01-01T23:59:59.000Z

493

Numerical Study of Terrain-Induced Mesoscale Motions and Hydrostatic Form Drag in a Heated, Growing Mixed Layer  

Science Conference Proceedings (OSTI)

A four-layer three-dimensional model whose lowest layer is a time and space-dependent, well-mixed boundary layer is employed over artificial, irregular terrain on the mesoscale during a daytime heating cycle. Only if the surface heating and mixed-...

J. W. Deardorff; K. Ueyoshi; Y-J. Han

1984-04-01T23:59:59.000Z

494

Mesoscale Convective Systems Defined by Their 85-GHz Ice Scattering Signature: Size and Intensity Comparison over Tropical Oceans and Continents  

Science Conference Proceedings (OSTI)

This study used the 85-GHz ice scattering signature to describe the size, intensity, and geographic distribution of mesoscale convective systems (MCSs) between 35°N and 35°S for January, April, July, and October 1993. An MCS was defined as an ...

Karen I. Mohr; Edward J. Zipser

1996-11-01T23:59:59.000Z

495

Pre- and Post-Sea-Breeze Frontal Lines—A Meso-?-Scale Analysis over South Israel  

Science Conference Proceedings (OSTI)

A meso-?-scale observational analysis of the fine surface structure of the sea-breeze fronts (SBF) over the coast of southern Israel is presented. Objective criteria for the SBF passage are derived based on wind speed and direction, temperature, ...

P. Alpert; M. Rabinovich-Hadar

2003-12-01T23:59:59.000Z

496

Oceanic Cyclogenesis as Induced by a Mesoscale Convective System Moving Offshore. Part II: Genesis and Thermodynamic Transformation  

Science Conference Proceedings (OSTI)

The genesis of intense cyclonic vorticity in the boundary layer and the transformation of a low-level cold pool to a warm-core anomaly associated with the long-lived mesoscale convective systems (MCSs), which produced the July 1977 Johnstown ...

Da-Lin Zhang; Ning Bao

1996-10-01T23:59:59.000Z

497

Simulations of the Climatological Wind Field in the Baltic Sea Area Using a Mesoscale Higher-Order Closure Model  

Science Conference Proceedings (OSTI)

A three-dimensional mesoscale numerical model is utilized to investigate the climatological wind field over the Baltic Sea. To cover all synoptic and boundary layer conditions, a large number of model runs have to be made. Since this type of ...

Stefan Sandström

1997-11-01T23:59:59.000Z

498

An Aircraft Study of Mesoscale Surface Wind Patterns and Associated Meteorological Conditions over Cape St. Francis, South Africa  

Science Conference Proceedings (OSTI)

Aircraft surveys have been conducted to assess the mesoscale pattern of wind and weather over Cape Saint Francis, South Africa, on the southern tip of the African continent. Ten surveys were flown at a level of 100 m above ground during November ...

Mark R. Jury; Roseanne D. Diab; Mark Schormann

1993-10-01T23:59:59.000Z

499

Mesoscale Convective Systems in Weakly Forced Large-Scale Environments. Part III: Numerical Simulations and Implications for Operational Forecasting  

Science Conference Proceedings (OSTI)

During a 24-h period, beginning 1200 UTC 11 May 1982, a series of mesoscale convective systems developed within a weakly forced large-scale environment. Two of these systems had a large component of motion against the midtropospheric flow and ...

David J. Stensrud; J. Michael Fritsch

1994-09-01T23:59:59.000Z

500

The Influence of Carl—Gustaf Rossby on Mesoscale Weather Prediction and an Outlook for the Future  

Science Conference Proceedings (OSTI)

This article presents an overview of the advances in mesoscale prediction from the time of Rossby to the present and an outlook for the future. The first part traces the evolution of research and forecasting based upon the conservation of certain ...

Robert Gall; Melvyn Shapiro

2000-07-01T23:59:59.000Z