河南省一次人工增雨作业分析

利用欧洲预报场、GRAPES模式预报及雷达等资料,分析2017年4月4日河南省人工影响天气中心开展的一次人工增雨作业过程。结果发现,低槽东移是此次降水的主要影响系统;此次过程全省大部分地区均有过冷水存在,北部、中部垂直累积过冷水含量较高,中部地区作业潜力最好;增雨作业结束后30 min,作业区及下风向回波增强,30 d Bz以上强回波区范围增大;比较对比区降水量,增雨效果显著。

Analysis of an Artificial Precipitation Enhancement Operation in Henan Province

By employing the European forecast field,GRAPES model forecast and radar data,the artificial precipitation enhancement operation which carried out by the weather modification center of Henan Province on April 4,2017 was analyzed.The results showed that the low trough eastward was the main influence system of this precipitation.Most areas of the province had subcooled water.The vertical accumulated supercooled water content in the north and middle was higher,and the central region had the best operating potential.After 30 min of rainfall operation,the echo of operation area and downwind enhancement.The range of strong echo area above 30 dBz was increased.Compared with the affected areas,the effect of rainfall enhancement was remarkable.