2007年湖北省梅雨期一次强降水天气过程分析

A case study of heavy rainy storm in Hubei province in 2007

利用江淮地区常规观测资料、FY2C卫星资料以及NCEP/NCAR提供再分析资料计算的多种物理量场,分析了2007年6月27—30日发生在湖北地区的一次强降水天气过程,结果表明:①此次强降水过程是一次典型的梅雨锋降水,降水强度大,持续时间长;②在对流层中层高纬度地区存在阻塞高压,中纬度地区表现为稳定的高空槽,而低纬度的东部沿海地区处于副高西侧控制,属于梅雨期的典型流场分布;高低空急流配置,对流层中低层的不稳定能量以及丰沛水汽输送等因素,共同触发了此次灾害性强降水过程的发生.③卫星TBB资料较好地描述了此次强降水过程表现出雨量分布不均,强度大的特征,黑体温度低值区与强降水区域一致.

In order to study mechanism of heavy rainfall in plum rain period,the paper use the data of global from 27 June to 30 June in 2007 of NCEP / NCAR and the same time of the data of general observations,FY2C in China's Jianghuai region to analysis a heavy precipitation in plum rain period.The results show that:①The heavy precipitation is a typical precipitation in plum rain period.The intensity of rainfall is strong,and it last a long time.②There is blocking high in the middle troposphere in high latitudes,and mid-latitudes showed stable upper trough,while the eastern coastal areas in the control of the subtropical high in the low latitudes.It is belong to a typical plum rain season flow field.The high or low jet,unstable energy in low level troposphere,and abundant moisture transportation are the important factors for the catastrophic heavy rainfall.③The data of satellite describe the characteristic of the heavy precipitation process,including the distribution uneven and the large intensity.The low value area of blackbody temperature corresponds to heavy precipitation area.