短时暴雨天气雷达回波概念模型的建立  

Construction of the Radar Concept Model of Short-Time Rainstorm

作　　者：孙莹[1] 王艳兰[1] 唐熠[1] 李向红[1] 

机构地区：[1]桂林市气象局,广西桂林541001

出　　处：《高原气象》2011年第1期235-244,共10页Plateau Meteorology

基　　金：国家自然科学基金项目(40865001);广西科学技术厅自然基金项目(桂科自0728076);广西气象局重点攻关项目(QK200727);广西桂林市科技局科技攻关项目(20070216-04)共同资助

摘　　要：通过对2005—2007年桂林39个短时暴雨个例进行普查分析,发现造成桂林短时暴雨的回波主要有块状、带状、絮状和涡旋状4种类型。通过对天气背景进行分析,形成了中尺度型块状回波、台风外围型块状回波、有无急流型带状回波、絮状回波、涡旋状回波6类雷达回波概念模型。建立了包括天气背景、强度回波特征、回波演变、其他产品特征、回波的源地移动和暴雨落区等的概念模型,以期为短时暴雨临近预报提供参考依据。Base on the survey and analysis of the 39 cases of short-time rainstorm in Guilin from 2005 to 2007,it is found that four types of radar echo which lead the short-time rainstorm in Guilin,such as lump radar echo,band radar echo,cotton-shaped radar echo and vortex-shaped radar echo.By the analysis of the weather background,the concept models of six type radar echoes are formed such as mesoscale scale lump radar echo,radar echo in the typhoon surrounding,with and without jet flow radar echo,cotton-shaped radar echo,and vortex-shaped radar echo.The concept models mainly include the weather background,echo intensity feature,echo evolution feature,other product characteristics,echo sources and movement.These can provide reference basis for the nowcasting of the short-time rainstorm.

关 键 词：短时暴雨 雷达回波 概念模型 

分 类 号：P406[天文地球—大气科学及气象学]