2009年7月一次锋前暖区暴雨分析  

Analysis of a Rainstorm in Warm Sector Ahead of Front Dver Guangxi in July 2009

作　　者：苏贵睦 蒙炤臻 陈向东 陆洪波 梁毅进 

机构地区：[1]贵港市气象局,广西贵港537100

出　　处：《气象研究与应用》2010年第2期26-29,I0003,共5页Journal of Meteorological Research and Application

摘　　要：利用探空和地面观测资料分析了2009年7月广西一次锋前暖区暴雨的环流特征和影响系统的变化,同时利用卫星云图、雷达资料和自动站资料来分析这次锋前暖区暴雨的一些中尺度特征。结果表明,500hPa高空槽前的辐合,贵港上空强的正涡度平流为这次暖区暴雨的产生提供了很好的环流背景,925hPa的中尺度涡旋和急流是激发这次锋前暖区暴雨的直接系统,发生在锋前暖区上空西南-东北走向的短云带中的中尺度对流云团是造成这次暖区暴雨的主要原因。Based on upper air sounding data,ground-based observations data,the satellite and radar data,the atmospheric circulation characteristic and the mesoscale characteristic of the warm-sector rainstorm ahead of front in Guangxi in July 2009 were analyzed.The results show that the convergence before the trough and the strong positive vorticity advection near Guigang on 500hPa level were the circulation background,the mesoscale vortex.The jet stream on 925hPa level induced the rainstorm.The southwest-northeast direction mesoscale convective cloud cluster in the short cloud band was the main cause of the rainstorm.

关 键 词：暖区暴雨 低空急流 中尺度对流云团 

分 类 号：P458.121.1[天文地球—大气科学及气象学]