The Evolution of Microphysical Structures and Cloud-to-Ground Lightning in a Deep Compact Thunderstorm over the Nanjing Area  

作　　者：Ji YANG Kun ZHAO Ping SONG Long WEN Fanchao LYU Jie MING Yuanyuan ZHENG 

机构地区：[1]Nanjing Joint Institute for Atmospheric Sciences,Key Laboratory of Transportation Meteorology of China Meteorological Administration,Nanjing 210041,China [2]China Meteorological Administration Radar Meteorology Key Laboratory,Nanjing 210023,China and School of Atmospheric Science,Nanjing University,Nanjing 210023,China [3]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China [4]National Key Laboratory on Electromagnetic Environment Effects and Electro-optical Engineering,College of Field Engineering,Army Engineering University of PLA,Nanjing 210007,China [5]Laboratory for Climate and Ocean-Atmosphere Studies,Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871,China

出　　处：《Advances in Atmospheric Sciences》2024年第12期2367-2380,共14页大气科学进展（英文版）

基　　金：primarily supported by the National Natural Science Foundation of China(Grant Nos.42025501,41805025,42175005,and 61827901);the National Key R&D Program of China(2022YFC3003905);the National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering(NO.JCKYS61422062101);the Meteorological Union Fund of the National Natural Science Foundation of China(U2142203);the Foundation of Jiangsu Provincial Meteorological Bureau(KM202308);The Open Grants of China Meteorological Administration Radar Meteorology Key Laboratory(2023LRMB04);S&T Development Fund of NJIAS(KJF202307);the Open Research Program of the State Key Laboratory of Severe Weather(2022LASW-A01)。

摘　　要：In this study,we examine the dynamics and microphysical structures of a deep compact thunderstorm event driving cloud-to-ground(CG)lightning over the Nanjing area located within the Yangtze-Huai River Basin(YHRB)during the monsoon break period.The microphysical structures combined with the dynamics in the glaciated,mixed-phase,and warm-phase layers during the formative,intensifying,and mature stages of the thunderstorm were first investigated using C-band polarimetric radar and CG lightning observations.The results show that the mature phase of the thunderstorm produced a local cold pool,which collided with a southerly warm wind,resulting in a strong updraft.The strong updraft favored the lifting of raindrops to the mixed-phase region to form abundant supercooled liquid water and graupel.From the formative stage to the developing stage and further to the mature stage,increased ZH-and reduced ZDR-values within the mixed-phase region are found,especially within the strong updraft region(>5 m s^(-1)).This phenomenon suggests that supercooled raindrops evolved into large hydrometeors(graupel and hail),indicative of a strong riming process.The signatures within this region are consistent with a favorable environment for thunderstorm electrification and generate the most frequent lightning during the thunderstorm life cycle.

关 键 词：THUNDERSTORM LIGHTNING polarimetric radar microphysical structure 

分 类 号：P446[天文地球—大气科学及气象学] P427.3