广州野外雷电试验基地地闪特征分析  

Analysis of the Characteristics of Cloud-to-Ground Lightning in Guangzhou Field Experiment Site for Lightning Research and Testing

作　　者：高国靖 余益君 郭青[1] 曾东好 曾惠娟 GAO Guo-jing;YU Yi-jun;GUO Qing;ZENG Dong-hao;ZENG Hui-juan(Meizhou Municipal Bureau of Meteorolog of Guangdong,Meizhou 514021,Guangdong,China)

机构地区：[1]广东省梅州市气象局,广东梅州514021

出　　处：《韶关学院学报》2020年第12期64-68,共5页Journal of Shaoguan University

基　　金：广东省气象局科学技术研究项目(GRMC2017M36).

摘　　要：利用1999—2018年广东电力系统地闪定位资料及同期典型天气过程个例,对广州野外雷电试验基地雷电基础参数进行了统计分析.结果表明:广州野外雷电试验基地多雷区,10 km半径范围20年平均地闪密度约为32.02 fl·km^-2·a^-1;一年中,地闪活动多发期为4—9月份,5—8月份为地闪高发期,峰值区出现在5、6月;一天中地闪活动主要密集时段在12—20时,午后地闪高发时段在14—18时,其中15时的地闪活动最为强烈;基地的闪电活动前汛期主要有单体雷暴,多单体雷暴甚至是飑线;进入7、8月份的后汛期,主要受台风系统影响,台风“莫拉菲”登陆前后24 h地闪密度呈三圈结构,地闪活动的密集区域主要集中在外雨带;通过对基地雷电基础参数分析,旨在为本地区开展雷电试验工作提供参考.Using cloud-to-ground(CG)Lightning data of the Guangdong Lightning Locating System(GDLLS)from 1999 to 2018 and a case of typical weather process in the same period,this study mainly analyzed the characteristics of CG lightning in Guangzhou Field Experiment Site for Lightning Research and Testing.The main conclusions of this paper are as follows:Guangzhou Field Experiment Site for Lightning Research and Testing belongs to more thunderstorm region;in a year,the multiple occurrence period of lightning activity is from April to September,and the high occurrence period of lightning activity is from May to August,with the peak areas appearing in May and June;the main intensive period of lightning activity in a day is from 12:00-20:00,the high occurrence period of afternoon lightning is from 14:00-18:00,of which 15:00 is the most intense;in the preflood season of the lightning activity of the base,it mainly includes single thunderstorm,multi single thunderstorm and even squall line;in the post flood season of July and August,it is mainly affected by the typhoon system,and the 24 h lightning density before and after the landing of Typhoon“morafi”presents a three circle structure.With the lightning activity through the analysis of basic parameters of base lightning,this paper aims to provide technical reference for local lightning test.

关 键 词：地闪 地闪密度 地闪特征 雷电流幅值 

分 类 号：P458.3[天文地球—大气科学及气象学]