摘要
用常规气象观测资料,中尺度自动气象站资料和多普勒天气雷达资料,对2009年4月15日发生在重庆中西部的飑线过程的进行了分析,发现了"逆风区"在预报中具有一定的提前量。同时通过四维变分(4D-VAR)同化方法反演风场,得到反演的水平风场能较好的反映飑线内部各个发展阶段的对流单体的内部流场结构,同时发现4D-VAR反演风场能较好的反映出飑线不同发展阶段的流场特征。
A squall line which attacked Chongqing on April 15,2009 was analysised,Based on sounding,surface observation and radar data,the weather is considered as a squall line.And the synoptic scale background,physical parameters and so on are analysed.It＇s found that ＂adverse wind region＂ exhibited by 4d-VAR can be used to forecast heavy precipitation.The retrieved wind can represent the squall line＇s internal structures of each convection cell.And it can display the character of flow field at various stages.
出处
《气象科学》
CSCD
北大核心
2012年第2期153-159,共7页
Journal of the Meteorological Sciences
基金
气象关键技术集成与应用(重点/面上)项目(CAMGJ2012M48)
