2008年6月1日鄂西北飑线天气过程综合分析  

Synthetic Analysis on a Squall line in Northwest Hubei on June 1,2008

作　　者：刘志勇 任玮颖 王莉萍 

机构地区：[1]湖北省丹江口市气象局,丹江口442700 [2]湖北省十堰市气象局,十堰4420000 [3]湖北省郧西县气象局,郧西442600

出　　处：《暴雨灾害》2009年第3期277-282,共6页Torrential Rain and Disasters

摘　　要：利用NCEP 1°×1°6 h再分析资料以及常规观测资料、多普勒雷达资料等,采用天气学动力诊断分析方法,对2008年6月1日下午到傍晚发生在鄂西北十堰市的一次飑线天气过程进行了分析。结果表明:高空冷槽、低层切变线与地面冷锋是此次天气过程的影响系统;地面中尺度辐合线是此次强对流天气的触发机制,同时高层干冷空气侵入增强了空气柱的对流性不稳定层结,有利于强对流天气发生与发展;雷达产品资料较好地反映了飑线特征,飑线的风暴中心与强对流天气落区有很好的对应关系。Based on 1°×1° 6 h re-analysis data from NCEP,conventional observation data and Doppler radar data,a squall line over Shiyan city of northwestern Hubei from afternoon to evening on 1st June 2008 is analyzed by using the synoptic and dynamic diagnostic method.The results show that the main influence systems of the squall line are the cold trough at the upper level,the shear line in the low-level and the cold front on the ground,and the triggering mechanism of the severe convection event is the meso-scale convergence line on the ground.At the same time,instability energy of the air column is strengthened as the incursion of dry and cold air of upper level,which is an important role in the development of severe convective weather.Characteristics of squall line are showed better by Doppler radar data in particular,and the severe convective area had a better corresponding relation with the storm center on squall line.

关 键 词：飑线 干侵入 中尺度辐合线 中气旋 

分 类 号：P458.13[天文地球—大气科学及气象学]