拉萨地区一次短时强对流天气中的冰雹和地闪活动特征分析  

Analysis of Hail and Ground Lightning Activity Characteristics during A Short-term Strong Convective Weather Process in Lhasa Region

作　　者：洛松卓玛 德庆曲珍 洛桑平措 Luosong Zhuoma(Lhasa Meteorological Bureau,Lhasa,Xizang 850000)

机构地区：[1]拉萨市气象局,西藏拉萨850000

出　　处：《农业灾害研究》2023年第11期156-158,共3页Journal of Agricultural Catastrophology

基　　金：西藏自治区科学技术厅自然科学基金一般项目(XZ202201ZR0016G)。

摘　　要：分析了2020年7月23日发生在拉萨市区短时强对流天气中的冰雹和地闪活动特征。结果表明:此次过程的地闪频数与冰雹之间有很好的对应关系,降雹阶段正地闪频数增加,负地闪减弱,正地闪占比最高;降雹阶段主要集中在20~60 kA之间的高电流强度;降雹时的雷电流陡度主要集中在5~10 kA/μs。Analyzed the characteristics of hail and lightning activity during the shortterm strong convective weather event that occurred in Lhasa city on July 23,2020.The results indicated that,there was a good correspondence between the ground lightning frequencies and hail in this process.During the hailing stage,the positive ground lightning frequencies increased,the negative ground lightning weakens,and the proportion of positive ground lightning was the highest;The hailing stage mainly focused on high current intensity between 20~60 kA;The lightning current steepness during hailing was mainly concentrated at 5~10 kA/μs.

关 键 词：冰雹 地闪 雷电流强度 雷电流陡度 

分 类 号：P458.1[天文地球—大气科学及气象学]