春季一次超级单体过程的成因分析  

Analysis on Weather Process of Supercell Storm in Spring

作　　者：廖小华 杨琴[2] 马月 郑熊莲 况孟奇 Liao Xiaohua;Yangqin;Ma Yue;Zheng Xionglian;Kuang Mengqi(Yunyang Meteorological office of Chongqing Province,Yunyang 404500;Chongqing Climate Center,Chongqing 401147)

机构地区：[1]重庆市云阳县气象局,云阳404500 [2]重庆市气候中心,重庆401147

出　　处：《气象科技进展》2021年第5期34-38,共5页Advances in Meteorological Science and Technology

基　　金：湖北省气象局基金项目(2018J05)。

摘　　要：利用常规观测资料、卫星资料以及多普勒天气雷达资料,分析了2016年4月27日午后发生在鄂西北的一次超级单体风暴过程。结果表明:高空冷槽、上干冷下暖湿、强垂直风切变等提供了良好的环境条件;汉江河谷喇叭口地形、湖陆风环流、中尺度地面辐合线以及低层暖湿气流产生的扰动与雷暴出流导致超级单体强烈增强;多普勒天气雷达特征表现为中气旋、低层有界弱回波区、典型钩状回波等超级单体特征,同时出现了三体散射、旁瓣回波等大冰雹特征;强的垂直风切变使得雷暴更有组织性并具有更长的生命史,有利于强对流天气的产生。Based on conventional observation,satellite and Doppler radar data,a supercell storm in northwest of Hubei that happened on the afternoon of 27 April 2016 was analyzed.The results show that the upper trough,warm moist air in the lower atmosphere and cold dry air in the upper and strong vertical wind shear provided a very good environmental condition.The trumpet-shaped topography of the Hanjiang River valley,the circulation of land and sea winds,the mesoscale surface convergence line,the disturbance produced by warm moist airflow of low layer and the cold pool outflow resulted in a strong enhancement of the supercell storm.The main characteristics of Doppler weather radar were meso-cyclone,bounded weak echo region,typical hook echo,etc.that were supercell storm features.Three body scatter signature(TBSS)and the side-lobe echo of large hail appeared at the same time.The strong vertical wind shear made the thunderstorm more organized and lasted longer,which is beneficial to the severe convective weather.

关 键 词：三体散射 超级单体 中气旋 有界弱回波区 

分 类 号：P458.3[天文地球—大气科学及气象学]