暴雨落区的统计与分析研究  

STATISTIC AND ANALYSIS OF RAINSTORM AREAS

作　　者：任敏[1] 郝莹[1] 陈焱[1] 

机构地区：[1]安徽省气象台,合肥230031

出　　处：《气象科学》2007年第2期214-219,共6页Journal of the Meteorological Sciences

基　　金：国家自然科学基金项目(编号:40675027);安徽省十一五科技攻关项目"以大气监测自动化系统为基础的中尺度强对流天气监测和预警研究"(编号:06013140B)共同资助

摘　　要：用34 a的降水资料对安徽省4—9月暴雨落区进行了统计分析,结果表明安徽暴雨主要集中在6月到7月,暴雨日数多寡和暴雨范围大小,基本决定了汛期降水多少和旱涝趋势。汛期暴雨落区集中出现在582—584 dagpm的500 hPa等压面斜坡上,因此暴雨带的位置预报大致可以用584 dagpm线的移动作参考。并用2003年梅雨期20场暴雨与一些实况物理量场进行对比,得出西风急流北侧以及500 hPa上升运动中心南侧到850 hPa上升运动中心北侧,有利于暴雨发生发展。By using the precipitation data of 34 years for statistic and to analyse the rainstorm areas from April to September in Anhui Province, the result shows that rainstorm of Anhui centralizes on June and July,and flood season rainfall as well as the trend of drought and waterlog depend basically on the amount and range of rainstorm. The rainstorm areas in flood season concentrate on the 500 hPa slope ran- ging from 582dagpm to 584 dagpm. Therefore,the prediction of rainfall belts can approximately refer to the movement of 584 dagpm isoline. In comparison of 20 rainstorms in Meiyu season of 2003 with some real physical variables,we get the conclusion that north side of west jet stream and from south side of 500hPa ascending center to the north side of 850 hPa ascending center are in favor of the occurrence and development of rainstorm.

关 键 词：暴雨 统计 物理量 

分 类 号：P462[天文地球—大气科学及气象学]