应用风廓线雷达资料对成都山区春季一次冰雹天气的风场分析  

Wind Field Analysis of a Hailstorm Event in Chengdu Mountainous Area in Spring Based on Wind Profile Radar

作　　者：倪成诚 李国平[3] 张净雯 牛金龙 陈洪 NI Chengcheng;LI Guoping;ZHANG Jingwen;NIU Jinlong;CHEN Hong(Chengdu Weather Modification Center,Chengdu 611100,China;Chengdu Meteorological Bureau,Chengdu 611100,China;School of Atmospheric Science,Chengdu University of Information Technology,Chengdu 610025,China)

机构地区：[1]成都市人工影响天气中心,四川成都611100 [2]成都市气象局,四川成都611100 [3]成都信息工程大学大气科学学院,四川成都610025

出　　处：《沙漠与绿洲气象》2025年第1期130-136,共7页Desert and Oasis Meteorology

基　　金：国家自然科学基金(42175002,42075013,42075008);四川省自然科学基金(2023NSFSC0242);成都信息工程大学科技创新能力提升计划重大项目(KYTD202201)。

摘　　要：应用边界层风廓线雷达等多源资料,对2022年3月16日成都西部出现的一次冰雹天气触发机制及风场特征进行分析。结果表明:高层干冷空气侵入与中上层干线(露点锋)是强对流天气的触发机制;风廓线雷达可以捕捉对流性天气的风场演变特征;利用风廓线雷达计算得到的风场诊断量对冰雹过程有较好的指示意义;垂直风切变峰值与低层风暴相对螺旋度谷值出现时间较冰雹发生有一定提前量;低空急流指数达峰时间与冰雹发生时间具有一致性。Based on wind profile radar data and other observational data,the trigger mechanism and wind field characteristics of a hail event that occurred in the western mountainous areas of Chengdu on March 16,2022,are analyzed.The results show that the intrusion of cold and dry air at upper levels and the presence of a dry line at mid-to-upper levels(dew-point front)are the primary triggers of this severe convective weather.The evolution of wind field characteristics can be effectively captured by wind profile radar.The diagnostic quantities derived from the wind field data have significant predictive value for this hailstorm.Notably,the peak times for vertical wind shear and low-level storm-relative helicity occur earlier than the onset of hail.Hailstorms typically occur when the low-level jet stream index reaches its maximum.

关 键 词：风场 风廓线雷达 强对流天气 冰雹 成都山区 

分 类 号：P458.121.2[天文地球—大气科学及气象学]