【摘要】 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。更多还原

【Abstract】 A large-scale rainfall synoptic process happened in Shanxi during 16th to 17th August 2005.The whole province suffered moderate and heavy rain process and heavy rain and rain storm even happened in most part of Taiyuan,Yangquan,Xinzhou,Linfen,Liuliang and Yuncheng.Using the Doppler radar data and the Lightning Orientation data,we analyzed this process.The result shows:join of the warm advection and large-scale atmospheric convergence made the different bend of the zero isoline of merridional wind speed between two sides of radar observation station.The various form long time atmospheric convergence over lower troposphere provide the water vapor horizontal transportation and ascending motion for the occurrence and maintaining of rainstorm.更多还原