【摘要】 使用常规天气资料、卫星云图和梧州S波段多普勒雷达资料对2009年7月19~20日发生在广西的一次典型台风强降水天气过程进行了分析。结果表明,在副热带高压南侧偏东气流引导下,台风向偏西方向移动直接影响广西,加上西南季风的叠加作用,造成了广西大范围的台风云系降水。从多普勒反射率因子图上,整个降水雨带为明显的旋转西进过程;多普勒径向速度图上,低层辐合高层辐散的配置有利于降水的发生发展,暴雨是长时间维持在其上空的强降雨云带造成的。更多还原

【Abstract】 Basing on conventional meteorological data,satellite images and Wuzhou S-band Doppler radar data of July 19-20,2009,a typical typhoon heavy rainfall process occurred in Guangxi were analyzed.The results show that,under the guidance of easterly airstream in the south of subtropical high,typhoon "Molave" moved westwards and impacted Guangxi directly.With the combined effect of the southwest monsoon,Guangxi occurred a wide range of precipitation.Basing on the Doppler reflectivity map,the entire precipitation rain bands were apparent westward rotation process.And basing on Doppler radial velocity map,the configuration of low-level convergence with high-level divergence is conducive to the precipitation occurrence and development.The rainstorm resulted from the cloud band maintaining over the rainfall zone更多还原