2010年3月14日河南省飞机增雨作业效果分析  

Analysis of Aircraft Precipitation Stimulation Effect in Henan Province on March 14,2010

作　　者：杨敏[1] 鲍向东[1] 马鑫鑫[1] 丁建芳[1] 杜春丽[1] 

机构地区：[1]河南省人工影响天气中心,郑州450003

出　　处：《气象与环境科学》2012年第B09期1-6,共6页Meteorological and Environmental Sciences

基　　金：河南省重大科技攻关项目"河南省云水资源开发利用技术研究"(0522030400)资助

摘　　要：利用天气图资料、河南省自动站降水资料、郑州新一代天气雷达产品等分析了2010年3月14日影响河南省的降水过程,以及当日飞机增雨作业效果,结果表明:由于受高空低槽东移影响,冷暖空气在河南交汇,且水汽输送良好、不稳定能量小,因而河南全省范围内产生了稳定的层状云降水;层状云降水,具备了飞机增雨作业的天气条件。此次增雨作业后,作业区及下风方向的雷达回波强度增强,面积扩大,降水范围及降水量均增大,且增雨效果能维持3 h左右。说明河南省春季,在有利的大尺度天气背景下,K指数在20～24℃,沙氏指数在6～10℃,雷达基本反射率在20～35 dBz,水汽条件较好时,在降水云系发展的区域进行飞机增雨作业效果比较明显。Using the synoptic data, AWS precipitation data in Henan province and the CINRAD ra dar products of Zhengzhou, the precipitation in Henan province on March 14, 2010 and the operation effects of artificial precipitation stimulation by aircrafts in the same day are analyzed. The results show that the eastward moving low trough, the intersection of cold and warm air in Henan, good water vapor transportation and the small unstable energy lead to a steady stratiform cloud precipitation in Henan prov ince. The stratiform cloud precipitation provides a nice weather condition to aircraft precipitation stimula tion. After the stimulation, the strength and area of the echoes in the working area and under whose wind direction are increased, and the range and mount of precipitation are increased and maintained for about 3 hours after the stimulation. The effect is remarkable on the base that in the context of large scale weath er, the K index is 20-24 ℃ , the SI index is between 61-0℃ , the radar base reflectivity is between 20-35 dBz, and with good moisture condition.

关 键 词：飞机增雨 稳定性降水 雷达回波 作业效果 

分 类 号：P481[天文地球—大气科学及气象学]