海南一次雷暴过程闪电特征分析  

Lightning Characteristics During a Thunderstorm in Hainan

作　　者：蒋尧 孙豪 杨敢 姚年鹏 戴炳哲 张其林[1] JIANG Yao;SUN Hao;YANG Gan;YAO Nianpeng;DAI Bingzhe;ZHANG Qilin(Key Laboratory of Meteorological Disaster,Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室,南京210044

出　　处：《电瓷避雷器》2022年第3期89-96,共8页Insulators and Surge Arresters

基　　金：国家重点研发计划(编号:2017YFC1501505);国家自然科学基金面上项目(编号:41775006,41675006);河北省科技厅重点研发计划项目(编号:19275409D)。

摘　　要：利用海南省三维闪电定位资料、SA波段雷达资料及云顶亮温资料对2019年9月9日的一次强天气过程进行闪电特征、雷达回波特征以及云顶亮温特征的分析。结果表明:雷暴起始于海南的东北部,整个过程一直向西南方向发展。云闪始发高度在5.5 km左右,雷暴发展期间高度维持在4~6 km。利用自主研发的磁天线对6次云闪和6次地闪进行分析,云闪上升沿时间、下降沿时间、半峰值宽度均在1~10μs区间;地闪半峰值宽度在10~25μs区间。闪电的电流强度在雷暴初期极不稳定,起伏较大,在发展过程中逐渐趋于稳定。雷暴旺盛发展阶段,闪电的雷达回波强度>30 dBz,部分超过了50 dBz;云顶亮温与闪电频次的相关性较好,闪电发生在190~230 K的冷云区中,云顶高度大概为14 km。3 D lightning location data, SA-band radar data and cloud top temperature(CTT) data are used on a strong lightning activity on September 9, 2019 in Hainan Province.Results shows thatthe thunderstorm starts in the northeast of Hainan and develops southwestward during the storm.Cloud lightning begins at 5.5 km and keep 4~6 km during the development.The rising time, falling time and half-peak width of 6 cloud flashes are in the range of 1~10 μs, and the half-peak width of 6 ground flashes is in the range 10~25 μs, using magnetic antennas developed independently.The current intensity of lightning is extremely unstable in the early stages of the thunderstorm and gradually gets stability during the development.The intensity of radar echoes at lightning occurrence is more than 30 dBz;The correlation between cloud top temperature and lightning frequency is good. Lightning occurs in cold cloud areas between 190~230 K,with cloud tops of about 14 km.

关 键 词：三维闪电定位 磁天线 雷达回波 云顶亮温 

分 类 号：P446[天文地球—大气科学及气象学] P427.3