2004年7月10日北京暴雨的中尺度分析  

A Mesoscale Analysis of a Heavy Rainfall Event on 10 July 2004 in Beijing

作　　者：毛冬艳 乔林 陈涛 杨克明 

机构地区：[1]国家气象中心,北京100081

出　　处：《气象》2005年第5期42-46,58,共6页Meteorological Monthly

摘　　要：利用常规探测、地面加密观测、NCEP1°×1°的6小时资料和雷达资料对2004年7月10日北京罕见的局地暴雨进行了天气动力学和中尺度分析。结果表明这次暴雨是在比较有利的天气背景条件下产生的,造成强降水的3个雨团在时空尺度上具有中β尺度系统的特征,不断移入的对流回波是降水的直接制造者,中尺度辐合线和小低压为降水发生提供了有利的触发条件。A dynamical and mesoscale analysis of a heavy rainfall event on 10 July 2004 in Beijing is made with the routine and densified observation, NCEP data and radar images. It's found that the heavy rainfall occurred under the favorable environmental conditions. Three rain clusters that brought heavy rainfall have the features of meso-β system and the convective echoes are the direct producer. The mesoscale convergence line and the mesoscale low provided favorable triggering effect for the occurrence of the heavy rainfall.

关 键 词：北京 暴雨 中尺度分析 天气动力学 环流背景 物理条件 地面要素 

分 类 号：P458.121.1[天文地球—大气科学及气象学]