黔西南州2018年3月13日冰雹过程分析  

Analysis of Hail Process in Qianxinan Prefecture on March 13,2018

作　　者：蒋尚雄 张辉 李松 JIANG Shangxiong;ZHANG Hui;LI Song(Meteorological Bureau of Qianxinan Prefecture,Guizhou Province,Xingyi Guizhou 562400)

机构地区：[1]贵州省黔西南州气象局,贵州兴义562400

出　　处：《河南科技》2020年第32期147-149,共3页Henan Science and Technology

摘　　要：本文利用常规天气资料、NCEP全球分析资料以及雷达探测资料等相关资料,对2018年3月13日出现在黔西南布依族苗族自治州(简称黔西南州)的一次冰雹过程进行分析。结果表明,此次冰雹天气是主要受南支槽前的西南气流的影响而产生的。本次天气过程中,环境场具备较强的风切变和不稳定的能量条件,垂直速度场存在上升运动,促进了过冷层中的水汽的不断积聚,为雹胚的产生和发展创造有利的动力条件。对流系统(MCs)是本次冰雹过程的重要影响系统。冰雹云最大强度(CR)最强为70.5 dBz,回波顶高(ET)最高为11.6 km,二者合并后构成线型的对流系统,在移动时不断变强,导致本次冰雹天气过程。By using conventional weather data,NCEP global analysis data,radar detection data and other related da⁃ta,this paper analyzed a hail process that occurred in the Buyi and Miao Autonomous Prefecture of Qianxinan(re⁃ferred to as Qianxinan Prefecture)on March 13,2018.The results showed that the hail weather was mainly caused by the southwest airflow in front of the south branch trough.During this weather,the environmental field had strong wind shear and unstable energy conditions,and the vertical velocity field had ascending motion,which promoted the con⁃tinuous accumulation of water vapor in the supercooled layer,and created favorable dynamic conditions for the gener⁃ation and development of hail embryos.The convective system(MCs)was an important influence system of this hail process.The maximum intensity of hail cloud(CR)was 70.5 dBz,and the highest echo peak height(ET)was 11.6 km.The two combined formed a linear convection system,which became stronger when moving,leading to this hail weather process.

关 键 词：冰雹 天气形势 雷达回波特征 黔西南州 

分 类 号：P412.25[天文地球—大气科学及气象学] P458.121.2