南昌一次大暴雨过程中闪电与回波特征分析  

Analysis of lightning and echo characteristics during a heavy rainstorm in Nanchang

作　　者：吕振东 于泽华 Lv Zhendong;Yu Zehua(Jiangxi Meteorological Service Center,Nanchang 330096;Jiangxi Ganxiang Lightning Protection Testing Center Co.,Ltd.,Nanchang 330006;Nanchang Meteorological Bureau,Nanchang 330038;Nanchang National Climate Observatory,Nanchang 330038)

机构地区：[1]江西省气象服务中心,南昌330096 [2]江西省蓝天科创有限公司,南昌330006 [3]南昌市气象局,南昌330038 [4]南昌国家气候观象台,南昌330038

出　　处：《气象水文海洋仪器》2024年第4期83-86,共4页Meteorological,Hydrological and Marine Instruments

基　　金：国家自然科学基金项目“江南地区暖区暴雨对流触发机制及组织结构研究”(41975001);江西省气象服务中心科研项目(FWZX202206)资助。

摘　　要：为了做好大暴雨过程的监测预警工作,文章运用地面气象要素、雷达回波、闪电数据等资料,对南昌市2023-06-19-2023-06-20大暴雨过程中的闪电特征进行了分析。结果表明:大暴雨是梅雨锋雨带稳定少动,雨带出现多个短时强降水形成的;在短时强降水发生前,闪电频繁(超过闪电频次平均线),短时强降水过程中闪电频次快速减少;短时强降水是形成大暴雨的重要原因,尤其是当同一地区出现两次以上短时强降水时,出现大暴雨的概率很大;大暴雨回波带由短带回波和多个对流单体回波组成,组合反射率可达45~55 dBZ。研究结果以期为南昌地区大暴雨中闪电和短时强降水的监测预警提供分析依据。In order to do a good job in monitoring and early warning of heavy rainstorm,this paper analyzes the lightning characteristics of heavy rainstorm process in Nanchang City from June 19 to 20,2023 by using ground meteorological elements,radar echo,lightning data.The results show that the heavy rainstorm is caused by the stable and little movement of the Meiyu front rain belt and the occurrence of multiple short-term heavy precipitation in the rain belt;Before the occurrence of short-term heavy rainfall,lightning occured frequently(exceeding the average lightning frequency line),and during the process of short-term heavy rainfall,lightning frequency rapidly decreased;Short term heavy rainfall is an important factor in the formation of heavy rainstorm,especially when there are more than two short term heavy rainfall in the same area,the probability of heavy rainstorm is very high;The echo band of heavy rainstorm is composed of short band echo and multiple convection cell echo,and the combined reflectivity can reach 45~55 dBZ.The research results are expected to provide an analytical basis for the monitoring and early warning of lightning and short-term heavy rainfall in heavy rainstorm in Nanchang.

关 键 词：大暴雨 闪电频次 短时强降水 

分 类 号：P458.3[天文地球—大气科学及气象学]