2016年6月30日湖北强对流天气过程分析及数值模拟  

Analysis and Numerical Simulation of Severe Convective Weather Process in Hubei on June 30,2016

作　　者：仝爽 Tong Shuang(Karamay Meteorological Bureau,Karamay,Xinjiang 834000)

机构地区：[1]克拉玛依市气象局,新疆克拉玛依834000

出　　处：《农业灾害研究》2023年第2期127-129,共3页Journal of Agricultural Catastrophology

摘　　要：利用ERA-Interim再分析资料、中国自动站与CMORPH降水产品融合的逐时降水量网格数据,对2016年6月30—7月1日湖北地区强对流天气环的流特征和触发机制进行了综合分析。结果表明,此次强对流天气的主雨带位于西太平洋副热带高压西北侧,850 hPa江淮切变线以南,850 hPa西南风急流轴左前侧,地面江淮准静止锋附近;925 hPa南风急流和850 hPa西南风急流在湖北地区低层建立的水汽通道为该地区强对流天气的发生、发展提供了充沛的水汽,同时湖北地区上空垂直方向的水汽输送也加强了当地的强对流天气;湖北地区上干下湿的大气状况和高对流有效位能为此次对强对流天气的发生、发展提供了充足的能量;地面江淮准静止锋、地面低压、低层江淮切变线、中层低压槽、低层冷涡造成的辐合上升运动为不稳定能量的释放提供了触发条件,有利于该地区强对流天气的发生、发展。Using ERA Interim reanalysis data and hourly precipitation grid data fused by China Automated Station and CMORPH precipitation products,the circulation characteristics and triggering mechanism of severe convective weather in Hubei Province from June 30 to July 1,2016 were comprehensively analyzed.The results show that the main rain belt of this severe convective weather is located in the northwest of the Western Pacific subtropical high,south of the 850 hPa Jianghuai shear line,left front of the 850 hPa southwesterly jet stream axis,and near the surface Jianghuai quasi stationary front;The 925 hPa southerly jet stream and 850 hPa southwesterly jet stream established the water vapor channel at the lower level in Hubei Province,providing abundant water vapor for the occurrence and development of severe convective weather in the region.At the same time,the vertical water vapor transport over Hubei Province has also strengthened the local severe convective weather.The upper dry and lower wet atmospheric conditions in Hubei and the high convective effective potential energy provide sufficient energy for the occurrence and development of severe convective weather.The convergence and upward movement caused by surface quasi-static front,surface low pressure,low level Jianghuai shear line,middle level low pressure trough and low level cold vortex provide trigger conditions for the release of unstable energy,which is conducive to the occurrence and development of severe convective weather in the region.

关 键 词：天气学 对流性天气 暴雨 数值模拟 环流形势 

分 类 号：P458.121.1[天文地球—大气科学及气象学]