湘西北地区一次局地特大暴雨分析  

Analysis of a Local Extraordinary Rainstorm in Northwestern Hunan

作　　者：何炳文 葛文忠[2] 高玉春[3] 胡振菊 邬建祥 

机构地区：[1]湖南省常德市气象局,常德415000 [2]南京大学大气科学系,南京210093 [3]中国气象局气象探测中心,北京100081

出　　处：《气象科技》2010年第2期193-196,I0010,共5页Meteorological Science and Technology

基　　金：中国气象局武汉暴雨研究所基金项目(IHR2008G04)资助

摘　　要：利用多普勒雷达资料和闪电定位资料,对2006年8月24日晚常德西北地区的局部特大暴雨成因进行分析,结果表明MCV的不断生成与合并维持MCC的生命史,3个MCC组成一个有组织的MCS,中尺度辐合线是造成特大暴雨的主要原因,回波的生成和发展趋向暖湿气流流入的方向,中低层东南暖湿气流为特大暴雨提供充足水汽,闪电活动的开始指示强降水的开始,南北向地形的抬升作用有利于回波维持和加强,提高回波降水效率和延长降水时间。The causes of a local extraordinary rainstorm in the northwestern Changde on 24 August 2006,by means of Doppler radar and Lightning data,is analyzed.The results indicate that the continual formation and combination of MCV（Mesoscale Convective Vortex） maintained the life cycle of MCC（Mesoscale Convective Complex）,and three MCCs formed an organized MCS（Mesoscale Convective System）;this heavy rain was caused mainly by the mesoscale convergence line;the generation and development of radar echoes inclined to the direction of the warm-wet airflow;the south-east warm and wet airflow provided sufficient vapor;the beginning of lightning activity indicated the beginning of the heavy rain;the lifting effect of the south-to-north terrain favored the maintenance and reinforcement of the rainstorm and enhanced and prolonged the rainstorm.

关 键 词：MCV MCC MCS 中尺度辐合线 闪电 地形 

分 类 号：P458.121.1[天文地球—大气科学及气象学]