气象Issue(6)：655-667,13.DOI:10.7519/j.issn.1000-0526.2014.06.002
2012年4月广东左移和飑线内超级单体的环境条件和结构对比分析
Comparative Analysis of Environmental Conditions and Structural Features for the Left-Moving Supercell and the Supercell in Squall Line in April 2012 Guangdong
摘要
Abstract
In April 2012,a series of severe thunderstorms which produced more hails than normal were seen in the Guangdong Province.This paper analyses two severe convective weather events,which are one left-moving supercell in the splitting storm that was observed first time in Guangdong and one supercell in a squall line,by using conventional meteorological observations,Doppler radar data and surface automatic weather station observations.The results show that a “thermal thunderstorm”initiated by local intense heating developed into a supercell storm which produced hails and severe wind gusts on 10 April.On 12 April,one squll line and the supercell which brought hails,severe wind gusts and torrential rains in a very short time were developed by the role of low-level warm advection and middle-level cold trough in the process of a shear line and a strong cold front moving southeastward,while the vertical wind shears went up by the advection process.The 0℃layer heights for the two events were lower than the local mean value in April.It was found that the changing of wind shear vector with heights determined the development trend of left-moving and righ-moving storm:The counterclockwise changing with heights of wind shear vector initiated a left-moving storm developed to a hailstorm after storms splitting on 10 April;and the clockwise changing was conducive for a squall line to be well organized and developed,and the supercell in the squall line moved to the right of the mean wind of the bearing layer.The left-moving supercell was characterized by a anti-mesocyclone,WER,side-lobe echoes and a strong echo center on the left side.The supercell in the squall line featured a mesocyclone,WER,side-lobe echoes and a strong echo center on the right side,the long TBSS and massive mid-level convergence,with 31.1 m·s-1 backside downburst.关键词
风暴分裂/左移超级单体/飑线/冰雹Key words
splitting storm/left-moving supercell/squall line/hail分类
天文与地球科学引用本文复制引用
伍志方,庞古乾,贺汉青,叶爱芬,刘运策..2012年4月广东左移和飑线内超级单体的环境条件和结构对比分析[J].气象,2014,(6):655-667,13.基金项目
广东省科技计划项目（2011A030200015）、中国气象局关键技术集成及应用项目（CMAGJ2014M39）、公益性行业（气象）科研专项（GY-HY201406002和GYHY201406009）及广东省气象局科技创新团队-2共同资助 （）
