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The Effect of Cumulus Cloud Field Anisotropy on Domain-Averaged Solar Fluxes and Atmospheric Heating Rates
 

Summary: The Effect of Cumulus Cloud Field Anisotropy on Domain-Averaged Solar Fluxes and
Atmospheric Heating Rates
LAURA M. HINKELMAN
National Institute of Aerospace, Hampton, Virginia
K. FRANKLIN EVANS
Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, Colorado
EUGENE E. CLOTHIAUX
Department of Meteorology, The Pennsylvania State University, University Park, Pennsylvania
THOMAS P. ACKERMAN
Fundamental Sciences Division, Pacific Northwest National Laboratory, Richland, Washington
PAUL W. STACKHOUSE JR.
NASA Langley Research Center, Hampton, Virginia
(Manuscript received 1 September 2006, in final form 11 January 2007)
ABSTRACT
Cumulus clouds can become tilted or elongated in the presence of wind shear. Nevertheless, most studies
of the interaction of cumulus clouds and radiation have assumed these clouds to be isotropic. This paper
describes an investigation of the effect of fair-weather cumulus cloud field anisotropy on domain-averaged
solar fluxes and atmospheric heating rate profiles. A stochastic field generation algorithm was used to
produce 20 three-dimensional liquid water content fields based on the statistical properties of cloud scenes
from a large eddy simulation. Progressively greater degrees of xz plane tilting and horizontal stretching

  

Source: Ackerman, Thomas P. - Department of Atmospheric Sciences, University of Washington at Seattle

 

Collections: Geosciences; Environmental Sciences and Ecology