Microphysical Characteristics of Extreme-Rainfall Convection over the Pearl River Delta Region, South China from Polarimetric Radar Data during the Pre-summer Rainy Season

作     者：Hao HUANG Kun ZHAO Johnny CLCHAN Dongming HU Hao HUANG;Kun ZHAO;Johnny C.L.CHAN;Dongming HU

作者机构：Key Laboratory for Mesoscale Severe Weather/MOE and School of Atmospheric SciencesNanjing UniversityNanjing 210023China State Key Laboratory of Severe Weather and Joint Center for Atmospheric Radar ResearchCMA/NJUBeijing 100081China School of Energy and EnvironmentCity University of Hong KongHong Kong 999077China Guangdong Meteorological ObservatoryGuangzhou 510062China 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2023年第40卷第5期

页      面：874-886页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：primarily supported by the National Natural Science Foundation of China(Grant Nos.42025501,41905019,and 61827901) the National Key Research and Development Program of China(Grant 2018YFC1506404 and Grant 2017YFC1501703) 

主　　题：microphysics extreme rainfall rate polarimetric radar lightning flash rate 

摘      要：During the pre-summer rainy season,heavy rainfall occurs frequently in South *** on polarimetric radar observations,the microphysical characteristics and processes of convective features associated with extreme rainfall rates(ERCFs)are *** the regions with high ERCF occurrence frequency,sub-regional differences are found in the lightning flash rate(LFR)*** the region with higher LFRs,the ERCFs have larger volumes of high reflectivity factor above the freezing level,corresponding to more active riming *** addition,these ERCFs are more organized and display larger spatial coverage,which may be related to the stronger low-level wind shear and higher terrain in the *** the region with lower LFRs,the ERCFs have lower echo tops and lower-echo ***,no clear differences of the most unstable convective available potential energy(MUCAPE)exist in the ERCFs in the regions with different LFR *** of the LFRs,raindrop collisional coalescence is the main process for the growth of raindrops in the *** the ERCFs within the region with lower LFRs,the main mechanism for the rapid increase of liquid water content with decreasing altitude below 4 km is through the warm-rain processes converting cloud drops to ***,in those with higher LFRs,the liquid water content generally decreases with decreasing altitude.