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Impacts of cloud radiative processes on the convective and stratiform rainfall associated with Typhoon Fitow(2013)

Frontiers of Earth Science 2022年第4期16卷 1052-1060页

作者： Huiyan XU Dengrong ZHANG Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change Hangzhou Normal UniversityHangzhou 311121China

The three-dimensional Weather Research and Forecasting(WRF)model was used to conduct sensitivity experiments during the landfall of Typhoon Fitow(2013)to examine the impacts of cloud radiative processes on thermal *** vertical profiles of heat budgets,vertical velocity,and stability were analyzed to examine the physical processes responsible for cloud radiative effects on surface rainfall for Typhoon Fitow(2013).The inclusion of clouds reduced radiative cooling in ice and liquid cloud layers by reducing outgoing *** suppressed radiative cooling reduced from the ice cloud layers to liquid cloud *** was conducive to reducing *** decreased instability was associated with the reduced upward *** reduced upward motion led to a decreased vertical mass ***,heat divergence was weakened to warm the *** with suppressed radiative cooling,these effects jointly suppressed net condensation and ***,the reduced rainfall due to the cloud radiative effects were mainly associated with the reduced convective and stratiform *** reduced convective rainfall was associated with the reduced net condensation,while the reduced stratiform rainfall was related to the constraint of hydrometeor convergence.

关键词： heat budget radiative cooling heat divergence latent heat release typhoon

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An Analysis of Thermally-Related Surface Rainfall Budgets Associated with Convective and Stratiform Rainfall

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Advances in Atmospheric Sciences 2011年第5期28卷 1099-1108页

作者：周玉淑 Xiaofan LI Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 NOAA//NESDIS/Center for Satellite Applications and Research Camp Springs Maryland

Both water vapor and heat processes play key roles in producing surface *** the water vapor effects of sea surface temperature and cloud radiative and microphysical processes on surface rainfall have been investigated in previous studies,the thermal effects on rainfall are analyzed in this study using a series of two-dimensional equilibrium cloud-resolving model experiments forced by zonally-uniform,constant,large-scale zonal wind and zero large-scale vertical *** analysis of thermally-related surface rainfall budget reveals that the model domain mean surface rain rate is primarily associated with the mean infrared cooling *** rainfall and transport of hydrometeor concentration from convective regions to raining stratiform regions corresponds to the heat divergence over convective regions,whereas stratiform rainfall corresponds to the transport of hydrometeor concentration from convective regions and heat divergence over raining stratiform *** heat divergence over convective regions is mainly balanced by the heat convergence over rainfall-free regions,which is,in turn,offset by the radiative cooling over rainfall-free *** sensitivity experiments of rainfall to the effects of sea surface temperature and cloud radiative and microphysical processes show that the sea surface temperature and cloud processes affect convective rainfall through the changes in infrared cooling rate over rainfall-free regions and transport rate of heat from convective regions to rainfall-free regions.

关键词： surface rainfall infrared cooling heat divergence cloud-resolving model simulation

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