玉林市2023年3月25日冰雹过程双偏振雷达特征分析  

Dual-polarization Radar characteristics analysis of a spring hail process on March 25,2023 in Yulin

作　　者：陆秋霖 李秀昌 林确略 朱振华 LU Qiulin;LI Xiuchang;LIN Quelue;ZHU Zhenhua(Yulin Meteorological Bureau,Guangxi Yulin 537000,China;Luchuan Meteorological Bureau,Guangxi Luchuan 537700,China)

机构地区：[1]玉林市气象局,广西玉林537000 [2]陆川县气象局,广西陆川537700

出　　处：《气象研究与应用》2023年第3期84-89,共6页Journal of Meteorological Research and Application

基　　金：玉林市气象局科研项目(玉气科[2021]04)。

摘　　要：利用常规气象观测资料和双偏振雷达资料,采用天气诊断分析方法,分析玉林市2023年3月25日冰雹过程的成因和双偏振雷达特征。结果表明:(1)此次冰雹天气是受高空槽、低层切变线和地面冷空气共同影响产生。(2)反射率因子强度均>60 dBZ,低层有入流缺口、有界弱回波区、三体散射和旁瓣回波等特征,中气旋厚度较厚,维持时间长。(3)上升气流中存在一定数量的液态雨滴和冰晶粒子;0℃层以下有一定数量的液态粒子和湿冰粒子,而0℃层以上有较大尺寸的冰晶粒子。The causes and the dual-polarization radar characteristics of the hail process on March 25,2023 in Yulin were revealed by using conventional meteorological observation data and Dual-polarization radar data.The results showed that:(1)The hail process was caused by the joint influence of an upper trough,lower shear line and cold air on the ground.(2)The reflectance factor intensities of radar echoes were>60 dBZ,and there were an inflow notch,a bounded weak echo region,three-body scattering and parabolic echoes in the lower layer.The mesocyclone was thick and maintained a long time.(3)There were a certain number of liquid raindrops and ice crystal particles in the updraft,and there were a certain number of liquid particles and wet ice particles below 0℃layer,while there were large size ice crystal particles above 0℃layer.

关 键 词：冰雹 双偏振雷达 三体散射 微差反射率 相关系数 比微差相移 

分 类 号：P458.121.2[天文地球—大气科学及气象学]