“6.18”湖北省大暴雨卫星云图分析

Analysis of Satellite Image of the Heavy Rain in Hubei Province on 18th Jun.,2011

使用常规观测资料、NCEP 1°×1°再分析资料、FY-2E卫星云图资料以及地面自动站资料,针对2011年6月17-18日发生在湖北中东部地区的一次大暴雨过程进行了天气动力学诊断和卫星云图分析,得到:①暴雨是在有利的大尺度背景场条件下,在特定的地域触发产生的;②中尺度对流云团出现在中低层低涡、切变线附近及低空急流左侧,有单一云团型、合并型和急剧发展型三种发展方式,尺度越大,生命史越长,在多个中-α尺度对流云团之间的新生云团发展最为迅速,其降水强度也最大;③低层辐合、高层辐散以及低层干线从北部侵入,干冷、暖湿空气在江汉平原和鄂东剧烈交汇触发产生这次大暴雨过程。

Using conventional observations,NCEP 1 ° × 1 ° reanalysis data,FY-2E satellite image data and ground station data,heavy rain in Hubei province 17-18th Jun.in 2011 is analyzed for synoptic diagnosis and satellite Image.It was found as following：（1） the heavy rain was produced in the large scale background and the special region;（2） mesoscale convective type and rapid development have combined two kinds of development,larger scale,longer-lived,in a number of α-scale convective clouds between the new development is most rapid,the maximum precipitation intensity;（3） low-level convergence,divergence,and low-level route from the North invaded,dry and cold,warm and humid air in the dramatic convergence of eastern Hubei Jianghan produce the heavy rain.