四川盆地东北部一次暴雨天气过程简析

本文利用常规观测资料、自动站雨量资料、多普勒天气雷达和闪电定位资料,使用天气学分析方法,分析2019年9月9日夜间至10日白天发生在四川盆地东北部的一次暴雨天气过程。结果表明：本次过程是在受地面冷空气抬升触发,中低层低涡切变系统叠加配合,高空辐散抽吸共同作用下发生的。地形强迫抬升,雨带停滞少动且降水强度大,是造成此次过程降雨量大而集中的主要原因。

Analysis of a rainstorm process in the northeast of Sichuan Basin

Based on the routine meteorological observation data, automatic precipitation station data, Doppler weather radar data and lightning location data, using the methods of synoptic analysis, analyzes a rainstorm process in the northeast of Sichuan Basin from the night of September 9 to the day of September 10, 2019. The result shows that the process is caused by the cold air uplift on the ground, the superposition of the low-altitude and middle-altitude wind shear systems ,and also the high-altitude suction. the forced climbing by the terrain, the stagnating of the rain band and the high intensity are the main reasons for the heavy and concentrated rainfall in this process.