摘要
文章利用常规观测资料、NCEP再分析资料、自动气象站观测资料和锡林浩特多普勒天气雷达产品等分析了2020年6月21—22日锡林郭勒盟一次明显降雨天气过程,以及飞机人工增雨作业效果。结果表明:(1)在天气形势和作业条件适宜的情况下,对系统云系播撒催化剂,促使大量的人工冰核迅速形成冰晶,使云中过冷水转化为降水。(2)飞机人工增雨作业后,作业区及下风方向的降水回波强度稳定或加强,回波面积明显扩大。(3)自动气象站雨量观测资料分析得出,飞机人工增雨作业使得飞机作业区及下风方向区域的降水范围及降水量均增大,增雨效果能维持3~6 h。(4)在有利的天气背景下,K指数为22~28℃,SI指数为0~2℃,比湿为8~12 k·kg^(-1),云顶温度在-15~-50℃,飞机人工增雨作业时间段内,云体较厚,含有丰富的过冷水,这种低能量高湿度且有较厚云体,具备了好的增雨潜势,适于开展飞机人工增雨催化作业。
This paper analyzes a significant rainfall weather process and the effect of the aircraft’s cloud seeding operation in Xilin Guole League from June 21 to 22,2020,by using conventional observation data,NCEP reanalysed data,automatic station data,satellite cloud map and Xilinhot Doppler radar data.The results show that:(1)If the weather conditions and operating conditions are appropriate,the catalyst is sown to the system cloud system to promote the rapid formation of ice crystals in a large number of artificial ice cores,so that the supercooled water in the cloud can be transformed into precipitation.(2)After the operation of aircraft cloud seeding,the intensity of precipitation echo in the operating area and downwind direction is stable or strengthened,and the echo area is obviously expanded.(3)The analysis of rainfall observation data of automatic station shows that the aircraft cloud seeding operation makes the precipitation range and precipitation in the aircraft operating area and the downwind direction area increased,and the effect of rain increase can be maintained from 3 to 6 h.(4)In the favorable weather background,K index is 22 to 28℃,SI index is 0 to 2℃,specific humidity is 8 to 12 k·kg^(-1),cloud top temperature is-15 to-50℃.At aircraft cloud seeding operation period,this low-energy,high-humidity and thick cloud body has a good rain-increasing potential and is suitable for artificial rainenhancing catalysis for aircraft.
作者
张向军
Zhang Xiangjun(Xilin Guole League Meteorological Bureau,Inner Mongolia Xilinhot 026000)
出处
《内蒙古气象》
2022年第1期44-48,共5页
Meteorology Journal of Inner Mongolia
关键词
飞机增雨
作业条件
作业效果
Aircraft cloud seeding
Aircraft operations
Effect of aircraft cloud seeding
