Abstract:
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.