A Large-Eddy Simulation Study of Anisotropy in Fair-Weather Cumulus Cloud Fields-Reference-Cited by-同舟云学术

A Large-Eddy Simulation Study of Anisotropy in Fair-Weather Cumulus Cloud Fields

Published:2005-07-01 Issue:7 Volume:62 Page:2155-2171
ISSN:1520-0469
Container-title:Journal of the Atmospheric Sciences
language:en
Short-container-title:

Author:

Hinkelman Laura M.¹,Stevens Bjorn²,Evans K. Franklin³

Affiliation:

1. Department of Meteorology, The Pennsylvania State University, University Park, Pennsylvania

2. Department of Atmospheric Sciences, University of California, Los Angeles, Los Angeles, California

3. Program in Atmospheric and Oceanic Sciences, University of Colorado, Boulder, Colorado

Abstract

Abstract Causes of anisotropy in fair-weather cumulus cloud fields were investigated using quantitative measures of anisotropy and a large-eddy simulation (LES) model. Case six of the Global Energy and Water Cycle Experiment (GEWEX) Cloud System Study Working Group 1 was used as the standard model scenario. This case represents radiatively forced development of cumulus clouds over the southern Great Plains. Cloud formation under a variety of environmental conditions was simulated and the degree of anisotropy in the output fields was calculated as a function of spatial scale. Wind shear was found to be the single greatest factor in the development of both vertically tilted and horizontally stretched cloud structures. Other factors included mean wind speed, initial water vapor mixing ratio, and the magnitude of the surface forcing.

Publisher

American Meteorological Society

Subject

Atmospheric Science

Link

http://journals.ametsoc.org/jas/article-pdf/62/7/2155/3484783/jas3463_1.pdf

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