滇东南地区三次典型冰雹天气特征分析

Analysis of three typical hail weather characteristics in Southeast Yunnan

文章结合滇东南地区的三次降雹天气过程,利用垂直累积液态水含量、冰雹指数、反射率垂直剖面、云顶高度等产品对天气过程冰雹云的回波特征展开分析。分析发现,在冰雹发展阶段速度场出现速度强势辐合,降雹过程中存在非典型钩状回波、“V”形缺口回波、三体散射、悬垂回波、中气旋等典型的降雹回波特征。经检验,各类雷达产品观测不同过程冰雹云的效果存在差异,综合使用雷达产品对准确做好降雹预警有重大意义。

The article combines three hail weather processes in southeast Yunnan and analyzes the echo characteristics of hail clouds during weather processes using products such as vertically integrated liquid water,hail index,vertical reflectance profile,and cloud top height.Analysis found that during the development stage of hail,there is a strong convergence of velocity in the velocity field,and there are typical hail echo characteristics such as atypical hook shaped echoes,V-notch echoes,three body scattering,hanging echoes,and gas vortex during the hail process.After inspection,it has been found that there are differences in the effectiveness of various radar products in observing hail clouds during different processes.The comprehensive use of radar products is of great significance for accurate hail warning.