LES study of precipitation/condensation dependance on cumulus clouds dynamics

Kogan, Yefim L.

Parameters affecting condensation/evaporation rates (CR/ER) in trade wind cumulus clouds were analyzed using LES model simulations. The model was initialized with data observed during the RICO field project, and simulated in a rather large inline-formula M1inlinescrollmathml normal 50.0 × normal 50.0 × normal 4 73pt10ptsvg-formulamathimga1d18593d75f41e1d0a5f49a911a8d03 asr-18-89-2021-ie00001.svg73pt10ptasr-18-89-2021-ie00001.png  kminline-formula3 domain. 2031 clouds were analyzed seeking relationships between CR/ER and thermo-dynamical cloud parameters. The condensation/evaporation rates were analyzed by stratifying the clouds by their size. The analyzed parameters included, among others, integral mass and buoyancy fluxes, as well as cloud and rain water and drop concentration.

The results revealed rather remarkable relationship between integral condensation/evaporation rate and integral upward mass flux. Identified relathionship may be useful for parameterization of subgrid latent heat in meso and large-scale models.

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Kogan, Yefim L.: LES study of precipitation/condensation dependance on cumulus clouds dynamics. 2021. Copernicus Publications.

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Rechteinhaber: Yefim L. Kogan

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