Convective clouds precipitation and precipitation efficiency characteristics in north jiangxi from july to september of 2002 and 2003

According to the regression analysis of 36 datasets of Nanchang Doppler weather radar,including Basic Reflectivity with elevation of 1.5° and 2.4°,Composite Reflectivity,Echo Top,echo area and Vertical Integrated Liquid and the ground rainfall,the multi-dimensional regression equation is established.The result indicates that Merger convective cell's liquid in its whole lifetime 269.76×106 m3.fewer than strong convective cell,and 198.68×106 m3.more than normal convective cell.The precipitation efficiency of strong convective cell is the biggest,the mean value of which is 25.74%,and is 15.74% more than convective cell and 13.21% than normal convective cell.