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A Cumulus Cloud Microphysics Parameterization for Cloud-Resolving Models
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DOI：10.1175/JAS-D-12-0183.1.png)
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Abstract
En 中文
A microphysical parameterization for shallow cumulus and boundary layer stratocumulus clouds has been developed. Similar to the Khairoutdinov and Kogan parameterization for stratocumulus clouds, the new parameterization is based on an explicit microphysical large-eddy simulation (LES) model as a data source and benchmark for comparison. The predictions of the bulk model using the new parameterization were tested in simulations of shallow cumulus and boundary layer stratocumulus clouds; in both cases the new parameterization matched the predictions of the explicit microphysics LES quite accurately. These results show the importance of the choice of the dataset in parameterization development and the need for it to be balanced by realistic dynamic conditions. The strong sensitivity to representation of rain evaporation is also demonstrated. Accurate formulation of this process, tuned for the case of cumulus convection, has substantially improved precision of rain production.
Keywords:
EDDY SIMULATION-MODEL
BULK ICE SCHEME
PART I
STRATOCUMULUS
AUTOCONVERSION
PRECIPITATION
FORMULATION
TRANSITION
Journal
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5.5
Papers:
9.6K
Citations:
6.9K
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