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2005年8月16日～17日,山西省出现大范围强降水天气过程,全省普降中到大雨,太原、阳泉、长治、晋中、忻州、临汾、吕梁、运城的大部分地区降大到暴雨或暴雨。我们利用多普勒雷达对这次过程进行了跟踪观测,并结合闪电定位系统的资料对这次过程进行了分析。结果表明:零速度线在测站近距离两侧弯曲程序不一致是暖平流与大尺度辐合运动的迭加所造成的,低空长时间各种形式的大气辐合运动结构为暴雨产生和维持提供了有利的水汽水平输送和上升运动的条件。
From August 16 to August 17, 2005, a large area of heavy precipitation occurred in Shanxi Province. The general rainfall dropped from mid to heavy rainfall in the province, and Taiyuan, Yangquan, Changzhi, Jinzhong, Xinzhou, Linfen, Luliang and Yuncheng all decreased To heavy rain or heavy rain. We use Doppler radar to track the process of this process, combined with lightning positioning system data to the process of analysis. The results show that the inconsistency of the zero velocity lines in the bending process on both sides of the station is caused by the superposition of the warm advection and the large-scale convergence motion. Various forms of atmospheric convergence motion at low altitude are provided for the generation and maintenance of rainstorms Favorable conditions of water vapor transport and ascent movement.