A14D:
Large-Eddy and High-Resolution Simulations for Improved Understanding and Parameterization of Clouds and Boundary Layer Processes I


Session ID#: 11025

Session Description:
Large-eddy simulations (LES) and high-resolution cloud-resolving models, i.e., limited-area models (LAM), are increasingly used to understand atmospheric processes with the goal of improving climate and weather model parameterizations. Early approaches used idealized scenarios, but the use of real-world configurations is becoming more common and offers great potential. The jump from idealized to realistic configurations brings with it many complicating factors and questions regarding how to best use simulations to develop robust parameterizations. Contributions are sought demonstrating novel approaches using real-world LES and LAM simulations for parameterization development and improving process-level understanding. Also of interest are contributions demonstrating how to overcome difficulties running real-world, ultra-high-resolution configurations, e.g., how best to incorporate observations to constrain the simulation through data assimilation or other techniques, include surface heterogeneity, initialize the model when clouds are present, evaluate the forcing and simulation accuracies, and increase the odds of successful simulations across a range of meteorological conditions.
Primary Convener:  William I Gustafson Jr, Pacific Northwest National Laboratory, Richland, WA, United States
Conveners:  Andrew M Vogelmann, Brookhaven Natl Lab, Upton, United States and Roel Neggers, University of Cologne, Cologne, Germany
Chairs:  William I Gustafson Jr, Pacific Northwest National Laboratory, Richland, WA, United States and Andrew M Vogelmann, Brookhaven Natl Lab, Upton, United States
OSPA Liaison:  Vera Schemann, University of Cologne, Institute for Geophysics and Meteorology, Cologne, Germany
Co-Sponsor(s):
  • AMS: American Meteorological Society -
Index Terms:

3314 Convective processes [ATMOSPHERIC PROCESSES]
3315 Data assimilation [ATMOSPHERIC PROCESSES]
3323 Large eddy simulation [ATMOSPHERIC PROCESSES]
3365 Subgrid-scale (SGS) parameterization [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Data assimilation for prediction, understanding and parameterization of "small scale" atmospheric motions (Invited) (76358)
Chris Snyder, National Center for Atmospheric Research, Boulder, CO, United States
The DOE Atmospheric Radiation Measurement Program’s LES ARM Symbiotic Simulation and Observation (LASSO) Workflow: Initialization, Forcing and Multiscale Data Assimilation (77101)
Zhijin Li1, Xiaoping Cheng2, William I Gustafson Jr3, Heng Xiao3, Satoshi Endo4, Andrew M Vogelmann5 and Tami Fairless4, (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)University of California Los Angeles, Los Angeles, CA, United States, (3)Pacific Northwest National Laboratory, Richland, WA, United States, (4)Brookhaven National Laboratory, Upton, NY, United States, (5)Brookhaven Natl Lab, Upton, United States
Observational constraint of drizzle properties and processes in large-eddy simulations from two models with size-resolved microphysics (Invited) (60096)
Ann M Fridlind1, Jasmine Remillard2, Andrew S Ackerman3, David B Mechem4, Pavlos Kollias5, Edward P Luke6, Patrick Y Chuang7, Mikael Witte7 and Robert Wood8, (1)NASA Goddard Institute for Space Studies, New York, NY, United States, (2)Columbia University of New York, Palisades, NY, United States, (3)NASA Goddard Institute for Space Studies, New York, United States, (4)University of Kansas, Lawrence, KS, United States, (5)Stony Brook University, Stony Brook, NY, United States, (6)Brookhaven National Laboratory, Upton, United States, (7)University of California Santa Cruz, Santa Cruz, CA, United States, (8)University of Washington, Department of Atmospheric Sciences, Seattle, United States
Are Cloud Thermals Slippery or Sticky? (Invited) (75232)
David M Romps1, Rusen Oktem2 and Alexander Benedict Charn1, (1)University of California Berkeley, Berkeley, CA, United States, (2)Lawrence Berkeley National Lab, Berkeley, CA, United States
Evaluation and Improvement of the Turbulence Parameterization in Deep Convective Clouds. (61438)
Didier Ricard1, Antoine Verrelle2 and Christine Lac1, (1)CNRM, Université de Toulouse, Météo‐France, CNRS, Toulouse, France, (2)CNRM-GAME, Toulouse Cedex 01, France
Employment of Mixed Layer Models and Large Eddy Simulations to Determine the Factors Controlling Stratocumulus Cloud Lifetime over the Coast (67695)
Mohamed S Ghonima, University of Calif San Diego, La Jolla, CA, United States, Thijs Heus, Cleveland State University, Solon, OH, United States, Joel R Norris, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States and Jan P Kleissl, Univ of California, San Diego, San Diego, CA, United States
Validation of Multi-Scale Simulations of the Flow over Big Southern Butte Using Weather Research and Forecasting Model (80438)
Branko Kosovic and Pedro Angel Jimenez, Johns Hopkins University, Ralph O'Connor Sustainable Energy Institute, Baltimore, MD, United States
GABLS4, an Intercomparison of Models in Extremely Stable Conditions over Antarctica: LES preliminary results F Couvreux, E Bazile, P LeMoigne, and the participants to the LES intercomparison (73125)
Fleur Couvreux Jr1, Eric Bazile2, Patrick Le Moigne1 and Guylaine Canut3, (1)CNRM-GAME, Toulouse Cedex 01, France, (2)Météo-France, CNRM/GMAP/PROC, Toulouse, France, (3)CNRM-Meteo France, Toulouse Cedex 01, France

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