怀化市雷暴大风的环境条件特征分析  

Analysis of environmental conditions of thunderstorms and gales in Huaihua

作　　者：黄梦妮 毛承敏 彭艳青[1] 王起唤 罗植荣 HUANG Mengni;MAO Chengmin;PENG Yanqing;WANG Qihuan;LUO Zhirong(Huaihua Meteorological Bureau,Huaihua 418000,China)

机构地区：[1]怀化市气象局,湖南怀化418000

出　　处：《贵州科学》2023年第1期71-75,共5页Guizhou Science

基　　金：湖南省气象局预报员专项(XQKJ21C003)。

摘　　要：本文选取怀化市2014年以来的52站次雷暴大风事件,采用分辨率0.25°×0.25°的ERA5再分析资料进行站点插值,对雷暴大风站点发生物理量值进行统计分析,发现:雷暴大风发生时需要一定的水汽总量,低层湿度条件较好,中层较干、环境温度直减率大,有利于强下沉气流的产生。CAPE均值在1327.6 J/kg,当CAPE值较小的情况下也有可能发生雷暴大风,有44%左右的雷暴大风属于弱垂直风切变条件下发生的。Based on 52 thunderstorm and gale events in Huaihua since 2014,and interpolation of ERA5 reanalysis data with a resolution of 0.25°×0.25°,the physical quantities at the sites with thunderstorms and gales are analyzed.The results show that: the occurrence of thunderstorms and gales requires a certain amount of total column water vapor.Good humidity condition in the lower level, dry in the middle level, and large ambient temperature lapse rate are conducive to the generation of strong downdraft airflow.The average CAPE is 1327.6 J/kg, while thunderstorms and gales may also occur when the CAPE value is small.About 44% of thunderstorms and gales occurred under the condition of weak vertical wind shear.

关 键 词：雷暴大风 环境背景 统计分析 

分 类 号：P446[天文地球—大气科学及气象学]