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Effects of Cloud Microphysical Latent Heat on a Heavy Rainstorm in Beijing
Chunwei Guo,Hui Xiao,Huiling Yang,Liang Zhai,Xiangchen Kong 한국기상학회 2019 Asia-Pacific Journal of Atmospheric Sciences Vol.55 No.3
The latent heat produced by cloud microphysical processes can greatly affect the thermal and dynamic structure of the atmosphere, as well as the development and evolution of clouds and precipitation. In this study, to examine the consequences of different kinds of latent heat produced by microphysical processes, four sensitivity tests were conducted based on the control simulation results of a heavy rainstorm occurred in Beijing on 21 July 2012 using theWeather Research and Forecasting Model (WRF).Without the latent heat absorption of evaporation, the convective cloud system developed stronger, and the accumulated precipitation amount increased.Without the latent heat release of deposition, the transit time of the surface front was delayed; in addition, the convective cloud system developed weakly. The accumulated conversion amounts of microphysical processes and the accumulated rainfall amount in the deposition adiabatic test were far less than those in the other tests.Without the latent heat of melting and freezing, the convective cloud system did not change substantially, and there was only a minor effect on precipitation. Hydrometeor production exhibited some changes related to precipitation in the five tests. The latent heat produced by the convective system varied substantially in the five tests with a change in the latent heat budget.
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