西宁市一次强雷暴天气过境的中尺度特征分析  

Analysis on the Mesoscale Characteristics of a Severe Thunderstorm Transit in Xining City

作　　者：周琴 谢启玉 李洪梅 李京梅 ZHOU Qin;XIE Qiyu;LI Hongmei;LI Jingmei(Xining Meteorological Observatory,Xining Qinghai 810003;Pingan District Meteorological Bureau,Haidong Qinghai 810600)

机构地区：[1]西宁市气象台,青海西宁810003 [2]平安区气象局,青海海东810600

出　　处：《河南科技》2021年第2期153-155,共3页Henan Science and Technology

摘　　要：本文利用地面及雷达探测资料,着重对西宁市2020年7月8日的一次强雷暴过境天气进行中尺度特征分析。结果表明,这是一次受冷平流强迫而出现的强对流天气过程,雷暴过境时具有飑线过境的特征。其间,雷暴大风和短时强降水出现在1 h负闪区前沿和对流云系后部的交错区。地面中尺度分析表明,此次强对流过程具有有效的对流触发机制,地面辐合线、干线的出现时间与中尺度系统的发展移动配合较好。在强对流天气出现时,短临雷达监测具有比较典型的产品特征。This paper used ground and radar detection data to analyze the meso-scale characteristics of a severe thun⁃derstorm transit weather in Xining City on July 8,2020.The results show that this is a strong convective weather pro⁃cess forced by cold advection,and the thunderstorm has the characteristics of squall line crossing.In the meantime,thunderstorms and strong winds and short-term heavy precipitation appeared in the cross section between the front of the negative flash zone and the back of the convective cloud system.Meso-scale analysis on the ground shows that the strong convection process has an effective convection trigger mechanism,and the appearance time of ground con⁃vergence lines and trunk lines are well coordinated with the development and movement of meso-scale systems.When severe convective weather occurs,short-term radar monitoring has typical product characteristics.

关 键 词：短时强降水 雷暴大风 中尺度特征分析 雷达产品特征 

分 类 号：P458.2[天文地球—大气科学及气象学]