【摘要】 本文根据1977—1978年、1980年和1982—1983年4—6月在古田试验区内观测的混合型云体的雷达回波资料,通过非参量性秩和检验方法,对非催化云和催化云作业后每隔10分钟的回波参量——最大回波顶高、雷达回波厚度、最大雷达回波强度——的演变以及它们之间的差异进行统计分析。结果表明:催化使得混合型云体的雷达回波厚度和最大雷达回波强度出现明显增厚、增强。更多还原

【Abstract】 Based on the radar echo data from mixed (strati and cumuli form) clouds over the Gutian area from April to Jane of 1977, 1978, 1980, 1982 and 1983, statistical analysis is made according to the Wilcoxon method, in 10-minutes steps following the seeding operations, of the echo parameters, namely, the eight of the top of the maximum echo intensity of the maximum echo andecho thickness, for both seeded and unseeded clouds. The results show that the echo thickness increases and the echo intensity strengthens conspicuously for the seeded mixed clouds.更多还原