【摘要】 文章采用统计检验和物理检验方法对2015年4月12日大连市出现的一次层状云降水过程进行了火箭增雨试验和作业效果评估,结果表明,通过作业区和对比区雨滴谱分钟雨量观测值与拟合值的对比计算发现,被催化云体在催化后的30~50 min内产生了最大雨强和降水,其相对增雨量达到49%(α<0.001),显著性较高;同时,催化云体的雷达回波强度、回波面积、降雨时间,以及雨滴谱的变化特征等均表现了很好的物理效应,增雨试验效果显著。更多还原

【Abstract】 This paper focuses on the effect verification and analysis of artificial precipitation enhancement for a stratiform cloud precipitation event,which occurred over Dalian on 12 April 2015,by using statistical and physical verification methods.The results reveal that the relative rain enhancement rate increases by49%(α<0.01) in 30- 50 min after catalyzing the operational clouds and reaches the maximum rainfall rate by calculating the minutely rainfall of observational and fitted values in the operation and contrast area.Moreover,significant improvement exhibits in physical effects in terms of radar echo intensity and area of target cloud,precipitation duration and variation characteristics of raindrop spectra in fitting clouds.更多还原