气象Issue(5)：588-597,10.DOI:10.7519/j.issn.1000-0526.2015.05.007
江淮地区弓状回波的分布和环境特征分析
Distribution and Environmental Characteristics of Bow Echoes over Jianghuai Region
摘要
Abstract
This study examines the environmental conditions of bow echoes and the related damaging thun-derstorm characteristics in Jianghuai Region (30°-36°N,115°-122°E)by using the sounding data,sur-face observations,reanalysis data as well as the severe weather reports in 2009-2012.The Doppler weather radar data are also used to investigate the spatial and temporal distribution of bow echoes,as well as their three-dimensional structures and possible mechanisms in causing damaging gales.Statistical results show that bow echoes in Jianghuai Region preferentially occur in northwestern Anhui,southeastern Jiang-su,southeastern Shandong to southwestern Jiangsu,and the plain between two mountains in southern An-hui with the frequency maximum in the late afternoon.The extreme damaging gales (>24.5 m·s-1 )in-duced by bow echoes account for 30% of all the extreme damaging wind events.The typical synoptic sys-tems associated with the bow echo are the northeast cold vortex (NECV)and upper-level trough,the mod-erate convective available potential energy (CAPE,1780 J·kg-1 )and vertical wind shear (11.6 m·s-1 between 1000 and 700 hPa),as well as a remarkable dry layer in the middle level.Compared with the envi-ronmental conditions affected by the upper-level trough systems,NECV is usually accompanied with a lar-ger DCAPE and stronger cold pool on the surface.According to the structure of radar observations,bow echoes in Jianghuai Region are divided into three categories,including classic bow echo (BE),bow echo complex (BEC),and squall line bow echo (SLBE),which account for 28.6%,14.3%,and 57.1%, respectively.关键词
弓状回波/雷暴大风/强对流Key words
bow echo/thunderstorm gales/severe convection分类
天文与地球科学引用本文复制引用
罗爱文,朱科锋,方茸,金龙,赵坤..江淮地区弓状回波的分布和环境特征分析[J].气象,2015,(5):588-597,10.基金项目
国家重点基础研究发展计划（973计划）项目（2013CB430101）、公益性行业（气象）科研专项（GYHY201006007和GYHY200906004）及国家自然科学基金项目（40975011）共同资助 （）
