摘要
利用伊宁新一代天气雷达资料,结合高空和地面观测资料,分析了2010年7月19日伊犁地区一次局地暴雨天气过程。结果表明:此次强对流天气过程的主要影响系统为500 hPa中亚低槽、200 hPa高空急流、低层风速辐合和地面雷暴高压。较强的层结不稳定和低层垂直风切变有利于对流的产生;云图和雷达资料分析表明,此次局地暴雨是由中尺度强对流云团产生,具有典型的对流单体形成、发展成回波短带合并形成带状回波,该带状回波最后演变成一个尺度较大的弓形回波。
Using Yining new generation of weather radar data, and combined with aerial and ground observational data, a local torrential rain weather process on July 19,2010 in YiLi was analyzed. The results showed that： （1）the strong convective weather process was mainly influenced by 500 hPa trough in Central Asia,200 hPa upper level jet, low-level wind convergence, and thunderstorm high over the ground. （2）Strong unstable stratification and low-level vertical wind shear were conducive to the generation of convection. （3）The formation of mesoscale strong convective clouds caused the local rainstorm, and the process included the formation of typical convection monomers and their development into echo short band. Then the band echo occurred and eventually transformed into an arched echo at a larger scale showed on nephogram and radar.
出处
《沙漠与绿洲气象》
2012年第2期49-52,共4页
Desert and Oasis Meteorology
关键词
中尺度分析
天气雷达
对流
局地暴雨
mesoscale analysis
weather Radar
convection
local rainstorm
