Extensions To A Similarity Hypothesis For Shallow Cumulus Convection |
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| Authors: | A R Brown A L M Grant |
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| Institution: | (1) The Met. Office, Bracknell, Berkshire, RG12 2SZ, U.K. |
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| Abstract: | Grant and Brown (Quart. J. Roy. Meteorol. Soc., 125, 1913–1936) proposed a similarity hypothesis for shallow cumulus convection and evaluated it using large-eddy simulation results. Here, results from an additional independent simulation are used to provide further support for the basic theory. At the same time, some extensions to the theory are proposed. It is shown that the effects of non-zero fluxes at cloud base can be conveniently accounted for by a simple representation of the transport of scalar variance into the convecting layer. Theeffects of having more complex mean profile shapes within the layer (and hence changes in the gradient production of variance) are also investigated. |
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| Keywords: | Cumulus Large-eddy simulation Similarity |
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