基于风廓线雷达产品的冰雹过程分析  

Analysis of Hail Process Based on Wind Profile Radar Products

作　　者：李源 杨哲[2,3] 徐文隆 吕林静[2] 陈胜远 LI Yuan;YANG Zhe;XU Wen-long(Guizhou Meteorological Service Center,Guiyang,Guizhou 550002;Guizhou Provincial Center for Atmospheric Detection Technology and Support,Guiyang,Guizhou 550081;Guizhou Weather Modification Office,Guiyang,Guizhou 550081)

机构地区：[1]贵州省气象服务中心,贵州贵阳550002 [2]贵州省大气探测技术与保障中心,贵州贵阳550081 [3]贵州省人工影响天气办公室,贵州贵阳550081

出　　处：《安徽农业科学》2024年第8期187-191,共5页Journal of Anhui Agricultural Sciences

基　　金：中国气象局云雾物理环境重点开放实验室开放课题(2020Z007);贵州省科技厅项目(黔科合基础-ZK〔2023〕一般200,黔科合支撑〔2023〕一般193)。

摘　　要：利用贵州省威宁县气象局的风廓线雷达基础数据及其二次开发产品、雨量站和MICAPS的实况数据,对2019年6月11日发生在威宁本站的一次冰雹大风天气过程进行综合分析。结果表明:水平廓线产品可反映出冷暖平流的时空变化及垂直分布,更早探测冷空气入侵、风场切变情况及低空急流强度;大气折射率结构常数和垂直速度可以指示降水的发生、持续时间及降水强度情况;强降水发生前有较强风垂直切变,降水过程中风垂直切变值整体大于0.2 s^(-1),风垂直切变的增强会引起垂直速度和地面大风的增大;若以大于15 dBZ和小于10 dBZ为降水的起止标志,风廓线雷达反射率因子较其他产品可以更清晰地指示降水的开始和结束。Based on the wind profile radar basic data of Guizhou Weining Meteorological Bureau,the secondary development products,rain-fall data and MICAPS live data,a hail gale weather process occurred at Weining Station on June 11,2019 was comprehensively analyzed.The results showed that the horizontal profile product could reflect the space-time change and vertical distribution of cold and warm advection,and detect the cold air intrusion,wind field shear and low-level jet intensity earlier.The atmospheric refractive index structure constant and vertical velocity could indicate the occurrence,duration and intensity of precipitation.There was strong wind vertical shear before the occurrence of heavy precipitation,and the wind vertical shear value in the precipitation process was more than 0.2 s^(-1)as a whole,the enhancement of wind vertical shear would cause the increase of vertical velocity and surface gale.If more than 15 dBZ and less than 10 dBZ were used as the starting and ending signs of precipitation,the wind profile radar reflectivity factor value could more clearly indicate the beginning and end of precipita-tion than other products.

关 键 词：冰雹 风廓线 雷达产品 低空急流 垂直速度 风垂直切变 大气折射率结构常数 

分 类 号：P413[天文地球—大气科学及气象学]