一次TS型线状对流不同阶段LMI闪电特征分析  

LMI Lightning Observation Characteristics in Different Evolution Stages of a TS Type Linear Convection

作　　者：张萍萍 林修栋 张莉萍 连帆 刘文婷 ZHANG Pingping;LIN Xiudong;ZHANG Liping;LIAN Fan;LIU Wenting(Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shandong,Jinan 250031,China;Weihai Meteorological Bureau,Weihai 264200,China;Wuhan Central Meteorological Observatory,Wuhan 430074,China)

机构地区：[1]山东省气象防灾减灾重点实验室,山东济南250031 [2]威海市气象局,山东威海264200 [3]武汉中心气象台,湖北武汉430074

出　　处：《沙漠与绿洲气象》2024年第2期99-106,共8页Desert and Oasis Meteorology

基　　金：山东省气象局基金项目(2021SDYD36)。

摘　　要：以2019年一次尾随层状(TS)型线状对流为研究个例,利用FY-4A闪电成像仪(LMI)观测资料、雷达组合反射率因子资料、地基闪电定位(ADTD)观测资料、FY-4A云顶亮温(TBB)资料和其他常规观测资料,对比分析LMI闪电数据在TS型线状对流3个不同演变阶段的数据可靠性及观测特征。结果表明:TS型线状对流不同演变阶段LMI观测的闪电具有一定的时空连续性,其分布与ADTD的闪电分布总体一致;对流发展阶段,LMI闪电位置略超前于TS型线状对流前导对流线,对未来0~1 h对流发展具有提前指示意义;对流成熟阶段,LMI观测的闪电与前导对流线位置较为一致,对线状对流发展具有监测意义;对流减弱阶段,LMI闪电一部分位于减弱的前导对流线中,另一部分位于其后侧尾随的积层混合云中。给出TS型线状对流不同演变阶段LMI闪电特征模型图,为LMI闪电产品在对流天气监测预警中的应用提供一定参考。Using FY-4A lightning imager(LMI)data,radar combined reflectivity factor data,ground-based Active Directory Topolopy Diagrammer(ADTD)lightning location data,FY-4A cloud top brightness temperature(TBB)data and other conventional observation data,the reliability and observation characteristics of LMI lightning data in three different evolution stages of a trailing stratiform(TS)linear convection in Hubei province in 2019 were analyzed.The results show that LMI lightning observation has a certain degree of space-time continuity in different evolution stages of linear convection,and the distribution of LMI lightning is generally consistent with that of ADTD lightning;In the stage of convection development,LMI lightning observation is mostly located in the front of the TS type linear convection leading convective line,which is ahead of the convective line,indicating the convection development in the next 0-1 hours in advance;In the mature stage of convection,LMI lightning observation is often close to leading convection line,which is significant for monitoring the development of linear convection;In the stage of convection weakening,a part of LMI lightning is located in the weakened leading convective line,and the other part is located in the stratiform mixed cloud area behind the linear convection.Finally,the model graph of LMI lightning observation characteristics in different evolution stages of TS linear process were given,which provides some reference for the application of LMI lightning products in convective weather monitoring and early warning.

关 键 词：闪电成像仪 线状对流 监测预警 

分 类 号：P458.3[天文地球—大气科学及气象学]