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A new conceptual model of convection [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
pages 108-109 : digital, PDF file
Additional Creators
United States. Department of Energy. Office of Energy Research and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Classical cumulus parameterizations assume that cumulus clouds are entraining plumes of hot air rising through the atmosphere. However, ample evidence shows that clouds cannot be simulated using this approach. Dr. Walcek suggests that cumulus clouds can be reasonably simulated by assuming that buoyant plumes detrain mass as they rise through the atmosphere. Walcek successfully simulates measurements of tropical convection using this detraining model of cumulus convection. Comparisons with measurements suggest that buoyant plumes encounter resistance to upward movement as they pass through dry layers in the atmosphere. This probably results from turbulent mixing and evaporation of cloud water, which generates negatively buoyant mixtures which detrain from the upward moving plume. This mass flux model of detraining plumes is considerably simpler than existing mass flux models, yet reproduces many of the measured effects associated with convective activity. 1 fig.
Report Numbers
E 1.99:doe/er--0661t
doe/er--0661t
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Note
Published through SciTech Connect.
09/01/1995.
"doe/er--0661t"
"DE96000982"
Walcek, C.
View MARC record | catkey: 14133406