摘要
利用2005-2007年6～8月FY-2C卫星逐30min红外云图资料,对东北及其邻近地区中尺度对流系统(包括椭圆型(MCC型)和持续拉长型(PECS型))进行普查分析,并把中尺度对流系统(MCS)分成3种尺度:MCC(或PECS)、MαCS和MβCS,统计分析了它们的时空分布及其与暴雨的关系。结果表明,MCS主要分布在东北平原和大兴安岭山脉,主要有3个中心:东北平原中部、东北平原入口区和大兴安岭北部山脉,以PECS型居多,占总数的62.7%,MCC型占37.3%。时间分布上,在季节上主要以6月居多,其次是7、8月,一天当中有两个峰值,即在15:00～22:00和00:00～07:00。成片暴雨区与MCS关系最为密切,有71%以上的成片暴雨区由中-α(β)尺度对流系统(MαCS和MβCS)造成,其中42.8%由MαCS造成,28.5%由MβCS造成。
Based on the 30 min infrared cloud image from the Chinese FY-2C satellite from June to August 2005-2007,the mesoscale convective system（MCS）（MCS include elliptical type MCC） and persistent elongated type（PECS） over Northeast China and its neighborhood,dividing the total MCS into MCC（or PECS）,MαMCS and MβCS are generally analyzed.The space-time distributions of MCS and relationship with rainstorm are obtained.Results show that MCS are mainly in the Northeast China plain and Daxinganling mountains,especially in the entrance to the plain as well as its central-northern portion;the number of PECS（62.7%） is more than that of MCC（37.3%）;the MCS mainly occur in June～August,particularly in June;the extratropical MCS appears two peak phases in a day,one at 15：00～22：00,the other 00：00～07：00.The area rainstorm is closely related to MCS,more than 71% of the area rainstorm were accompanied by MαCS（42.8%） and MβCS（28.5%）.
出处
《高原气象》
CSCD
北大核心
2011年第5期1224-1231,共8页
Plateau Meteorology
基金
公益性行业(气象)科研专项"东北暴雨发生发展特点及预报技术研究"(GYHY200906011)
中国气象局预报员专项"中国东北地区短波低槽型对流性暴雨研究"(CMATG2010Y06)共同资助
关键词
中国东北
中尺度对流系统
时空分布
红外云图
暴雨
Northeast China
MCS
Space-time distributions
Infrared cloud image
Rainstorm
