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中文摘要: 根据湖南8年夏秋积云随机化高炮AgI增雨试验获得的28块作业云和20块对比云的观测资料，经雷达回波和降水参数的统计和双比分析表明，催化作业对积云的顶高和面积无明显影响，但可能增加回波强度和降低其强中心高度，使作业积云总降水量增加17％，雨量增加28％，雨强增大24％，降雨持续时间延长7％，但统计样本少，显著度不高。
中文关键词: 湖南，夏秋积云，高炮增雨，随机化试验，效果分析
Abstract:Statistical analysis and double ratio analysis between the radar echo and the rainfall parameters of single cumulus were conducted by use of the 8 years (1979～1986) randomized experiment data of 28 seeded clouds and 20 controlled clouds observed in Hunan province.The results show that the total precipitation,rainfall amount,rainfall intensity and rainfall duration of the seeded clouds increase by a factor of 17%,28%,24% and 7% than those of the controlled clouds respectively.It is not obvious that anti aircraft gun seeding affects on the cloud top height and the cumulus area as well,but it is obvious that the seeding perhaps increases the radar echo strength of cumulus and decreases the echo depth of the strong core in the randomized experiment.
keywords: Hunan province,single cumulus,anti-aircraft gun seeding,randomized experiment,rainfall enhancement
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引用文本：
刘耀宗,王治平,陈历舒,1999.湖南单块积云高炮增雨随机化试验效果的分析[J].气象,25(8):16-21.
,1999.Effect Analysis on Rain Enhancement of Single Cumulus Randomized Seeding Experiment in Hunan Province[J].Meteor Mon,25(8):16-21.
刘耀宗,王治平,陈历舒,1999.湖南单块积云高炮增雨随机化试验效果的分析[J].气象,25(8):16-21.
,1999.Effect Analysis on Rain Enhancement of Single Cumulus Randomized Seeding Experiment in Hunan Province[J].Meteor Mon,25(8):16-21.