摘要
利用常规气象观测资料和和ERA5再分析资料,对2020年5月16日广西一次暴雨过程进行研究,分析有利于引发此次短时剧烈雨强的深厚湿对流发生加强的天气形势、环境场特征。结果表明:(1)本次降水中心出现在多个天气尺度系统有利于上升运动区域的重合区。(2)对流单体风暴沿着辐合线不断新生合并形成列车效应是桂林短时强降水持续的主要原因。(3)此次降水是华南西部汛期比较常见的典型热带型降水,造成小时雨强40mm·h-1及以上的多单体风暴具有低质心(回波极值在50~55dBZ,高度5.5km)、液态含水量高(15~21kg·m^(-2))、回波顶高(13~15km)的特点。
Based on conventional meteorological observation data and ERA5 reanalysis data, this paper studies a heavy rain process in Guangxi on May 16,2020, and analyzes the weather situation and environmental field characteristics which are conducive to the intensification of the deep wet convection that caused this shortterm severe rainfall. The results show that:(1)The precipitation center appeared in the overlapping area of multiple synoptic-scale systems that are favorable for the upward movement.(2)Convective cell storms continue to regenerate and merge along the convergence line to form a train effect, which is the main reason for the continuation of short-term heavy rainfall in Guilin.(3)This precipitation is a typical tropical precipitation that is relatively common in the flood season in western South China, resulting in a multi-cell storm which has the characteristics of a low center of mass(the echo extremum is 50-55dBZ, and the height is 5.5km), high liquid water content(15~21kg·m^(-2)) and high echo top(13~15km), and causes precipitation with an hourly rainfall intensity of more than 40mm·h^(-1).
作者
卢伟萍
孙靖雯
肖志祥
赵华生
莫建飞
Lu Weiping;Sun Jingwen;Xiao Zhixiang;Zhao Huasheng;Mo Jianfei(Guangxi Institute of Meteorological Sciences,Nanning 530022,China;Wuzhou Meteorological Bureau,Guangxi Wuzhou 543002,China)
出处
《气象研究与应用》
2022年第3期62-66,共5页
Journal of Meteorological Research and Application
基金
广西重点研发计划项目(桂科AB21196041)
广西人工智能预报技术创新团队项目。
关键词
强降水
辐合线
天气特征信息
heavy precipitation
convergence line
weather characteristic information
