榆林一次春季连阴雨天气分析

Analysis on a Rainy Weather in Spring of Yulin

利用2015年4月1—5日榆林市12个县区观测站的降水观测记录与micaps资料分析了榆林市的一次春季连阴雨天气过程,过程历时5 d。结果表明,主要受巴尔克什湖附近低压中心前期分裂的短波槽与后期低压中心东移带来的冷空气影响,与低层低涡切变和南风气流相配合形成了连阴雨。

The rainy weather process in spring of Yulin was analyzed , by us- ing precipitation observation records and micaps data of 12 counties in Yulin City in April 1-54, 2015, and the process lasted 5 days. The results showed that continuous rain was formed by effects of the short wave trough of early division of the low pressure center near lake balkesh and the cold air brought by the late low-pressure center, then matched with low-low vortex shear and south wind flow.