利用NCEP FNL 1°×1°再分析资料、地面和高空观测资料、银川市和灵武市区域自动站及水文站降水量资料,以及卫星云图、雷达观测资料,对2016-07-10下午发生在灵武市和2016-08-21T19：00至夜间发生在银川市贺兰山沿山两次小范围、短时、破历史记录暴雨过程成因进行对比分析。结果表明,两次过程均表现出暖气团势力强盛,在暖气团控制下,高温、高湿、高能区由切变线或弱锋面触发了强烈对流系统的发生和发展;由于系统尺度较小,受地面不均匀性影响,对流性降水发生后,系统经原地生成、原地发展、原地降水、原地消散,从降水开始到结束,系统稳定少动,因此造成降水强度大、范围小、发生时间短等特点。
By using NCEP FNL 1° ×1° reanalysis data, the upper air and surface observation data, precipitation data of Yinchuan and Lingwu from meteorological station and hydrological station, satellite cloud and radar images, a comparative analysis of the causes of two small scale and short-time record-breaking rainstorm processes were analyzed. These tow rainstorm occurred in Lingwu in the afternoon on 10 July and in Yinchuan from 19 o ＇clock to midnight on August 16, 2016 along the Helan mountain, respectively. The results showed that the occurrence and development of strong convective system were triggered by high temperature, high humidity and high energy zone of shear line or weak front under the control of powerful warm air mass in the two processes. Because of the small scale of the system and the uneven influence of the ground surface, the system was generated, developed, precipitation and dispersed in situ after the convective precipitation occurred. From the beginning to the end of precipitation, the system was stable and less moving, which resulted in the characteristics of large precipitation intensity, small range and short-time accuracy.
Ningxia Engineering Technology
two short-time rainstorm