吉林省1980—1987年播云降雨的效果检验及其判据  

THE EFFECT TEST AND CRITERION OF CLOUDS SEEDING DURING 1980—1987 IN JILIN PROVINCE

作　　者：汪学林 刘健 

机构地区：[1]吉林省人工降雨防雹办公室,长春130062

出　　处：《应用气象学报》1992年第4期418-423,共6页Journal of Applied Meteorological Science

摘　　要：1980—1987年春季到初夏,在外场使用干冰进行了62次播云试验。用事后区域回归窜渡方法检验增雨效果,平均增雨效果为40%,其中积状云催化效果为51%,层状云为31%。根据统计-物理学分析,播云增雨效果与云顶温度,中云云厚密切相关。按照作业判断指标,一般在作业下风方35—60km 处出现最大增雨效果区。另外,用逐步回归和逐步判别法得到了两个估算和判别催化效果的方程。62 time cloud experiments with aircraft seeding dry ice were conducted during 1980—1987 over Jilin Province.In order to evaluate the effectiveness of cloud seeding quantitatively,astatistical method is developed.The results show that relative increment is about 40%,in which,average increment for cumulus is about 51%,stratiforms is about 31%.It is also found that theeffectiveness of cloud seeding are closely related with temperature of cloud top and thickness ofmiddle clouds.The area of greatest increment effecitiveness is 35—60km in downwind directionfrom seeding line.And,two equations to estimate and criticize seeding effectiveness are devel-oped.

关 键 词：效果检验 层状云 云顶温度 积状云 下风方 外场使用 判别法 人工增雨 对比区 云状 

分 类 号：P4[天文地球—大气科学及气象学]