摘要
使用常规地面和高空原始报文资料,采用最优插值法,对2004年4月29日出现在武汉天河机场临近的两次强雷暴天气过程进行了客观诊断分析。结果表明:两次强雷暴天气,前一次为典型的飑线天气过程,后一次为超级雷暴单体天气过程;高空槽、冷锋、中尺度低值系统是当天两次强雷暴天气的触发机制;低空深厚湿层(水汽丰富)、高低空存在急流强风带对当日飑线天气的形成和发展较为有利,强的不稳定层结、强的环境风垂直切变以及上层干、下层湿的湿度层结对当天超级雷暴单体的形成和发展十分有利。
Based on the meteorological conventional data, the two severe rainstorms happening in April 2004 near Wuhan airport are diagnosed by the optimal interpolation method. The results show that the first severe rainstorm was caused by the squall line and the second one was a typical supercell storm. The upper trough, the cold front and the mesoscale cyclone were the trigger mechanisms of the two rainstorms. Took advantage of some factors such as the rich moist air at the lower layer and the two jet ＂flows at the upper layer are favorable for the growth of the squall line and the very unstable stratification and the strong vertical shear of the wind benefit the formation and development of the supercell storm.
出处
《暴雨灾害》
2007年第1期73-77,共5页
Torrential Rain and Disasters
关键词
飑线
超级单体
能量
不稳定层结
垂直风切变
Squall line
Supercell storm
Energy
Unstable
Vertical shear of wind
