【摘要】 本文分析了1988—1989年5—7月在人工增雨作业的同时在飞机上所获取的云物理资料,得到以下几点新结论:(1)三类主要降水天气条件下高层云(As)云滴谱用赫尔吉安-马逊公式来拟合,系数α值为0.898—20.018,系数b值为0.427—0.598,相关系数均在0.86以上;(2)取得了云滴浓度、平均直径、平均立方根直径的垂直分布;(3)雪晶平均谱呈现出单峰和双峰的特点;(4)三类主要降水天气高层云平均含水量分别为0.11,0.08和0.05g/m~3,且含水量在水平方向的分布呈现出不均匀性。更多还原

【Abstract】 In this paper, the in situ measure data of As cloud during the artificial precipitation enhancement in 1988-1989 are analysed. The conclusions are as following:(1) The drop size distributions of As clouds are fitted by using XP aH-Ma formula for three main precipitation weather systems. The distribution parameter ais from 0.898 to 20.018, and bis from 0.427 to 0.598. The correlation coefficients are better than 0.86.(2) The vertical profiles of particle size distribution parameters are got.(3) There are single peak and double peak features in snow crystal spectra.(4) The mean liquid water content of As clouds for three weather patterns are 0.11, 0.08 and 0.05g/m3, respectively.更多还原