Extended Abstract

Research of Meso-scale Convective Systemsover Jinan on 18 July 2007ZHUO Hong 1,2 ,ZHAO Ping 3 ,REN Jian 2 ,PU Zhangxu 2 ,and YANG Furong 21. State Key Laboratory of Severe Weather, Chinese Academy of MeteorologicalSciences, Beijing, China2. Jinan Meteorological Bureau, Jinan , China3. National Meteorological Information Centre, Beijing, China, zhaop@cma.gov.cn1. IntroductionMeso-scale convective systems (MCSs) appear repeatedly in the same regionoften result in severe heavy rain. The first study of MCS focused on the Meso-scaleconvective complex (MCC, a large scale MCS), which was defined by Maddox (1980)based on satellite infrared Black Body Temperature (TBB)( Velasco et al,1987;MillerD,et al,1991;Tao et al,1998).After that, Scholars have revised the shape and scale(Augustine, et al,1988; Ma Yu,1997). Recently, the shape and scale of MCSs havebeen reclassified(Anderson,et al,1998;Jirak,et al,2003) and divided into fourcategories(Table 1): MCC, permanent elongated convective system(PECS),Meso-β-scale MCC (MβCCS) ,and Meso-β-scale PECS( MβECS).Table 1. MCS definitions based upon analysis of IR satellite data (Jirak 2003)MCScategorySize Duration ShapeMCCCold cloud region ≤-52℃ with Size definition met for Eccentricity≥0.7 at time ofarea ≥50000km 2≥6hmaximum extentPECS0.2≤eccentricity