摘要
利用NCEP再分析资料、常规观测资料,对2010年6月18～19日发生在川渝地区的强降水和强对流天气过程进行了分析。结果表明,水汽输送主要来自孟加拉湾,强对流天气与垂直速度及涡度所表现的强烈上升区存在一定的对应关系。高层对流不稳定层结的向南发展,配合低层条件不稳定,为形成强对流天气提供了强迫机制。湿Q矢量散度负值区与后续的6h强降水中心对应得较好。
Using the routine observation data and NCEP 1°×1°final-analysis data,a case of severe convection weather in Sichuan and Chongqing was analyzed.The main conclusions are ：the moisture transportation flux is transferred from Bay of Bengal.The area of severe convective weather process are corresponding with upwards vertical velocity field and vorticity.The instable atmosphere of upper layer moves southwards,and cooperate with conditionally unstable atmosphere of lower layer are advantageous to formation and developing of the convective weather.Wet Q Vector divergence is more closely associated with precipitation in the later 6-hour.
出处
《高原山地气象研究》
2011年第4期36-41,共6页
Plateau and Mountain Meteorology Research
关键词
中尺度天气
对流系统
诊断分析
Meso-scale weather
strong convective system
diagnostic analysis
