【摘要】 在假定空气绝热上升的基础上,本文根据云的凝结率和地面的降水率,推导出层状云系降水效率的计算公式,其优点是可以用常规探空资料和地面雨量求得降水效率。本文还利用1980和1983年梅雨期的南京、阜阳和安庆探空资料估算云中垂直气流速度,得到云的凝结率;对上述两年的地面降水率分别用安徽白湖地区和南京以西滁县地区的加密雨量站网求得平均雨量,进而得到梅雨锋层状云系的降水效率。更多还原

【Abstract】 Based upon the cloud condensation rate and the precipitation rate on the ground, a formula for calculating the precipitation efficiency in stratiform clouds is presented on the assumption that the air rises adiabatically. The primary advantage of this method is that the precipitation efficiency can be obtained by using only the routine sounding data and rainfall measurement. In this paper the cloud vertical velocity and condensation rate are also estimated from the sounding data at Nanjing, Fuyang and Anqing during the plum rain seasons of 1980 and 1983, and the average areal rainfall and condensation rate are calculated by use of the data from the station network in the rain area for the two years. The precipitation efficiency of the plum rain are thus obtained.更多还原