青岛机场一次台风外围暴雨天气分析

Analysis of A Rainstorm Outside A Typhoon at Qingdao Airport

利用多普勒雷达资料、葵花8卫星云图、常规观测资料和自动站数据,分析了2020年8月25—26日处于台风外围的青岛机场出现的一次大暴雨天气过程。发现台风外围环流背景是青岛机场出现此次暴雨天气的主要因素。虽然台风外围环流带来的暖湿空气和冷空气交汇于山东中部地区,形成大范围长时间的主雨带,但青岛地区受台风倒槽的影响,持续有对流云团生成,并且在向西北方向移动的过程中加强发展。由于青岛崂山山区地形造成的迎风坡效应,同时26日青岛地区水汽条件较好,尤其是水汽通量散度达到-26 g/(cm2·hPa·s)有利于青岛地区出现持续性的强降水天气,使得包括青岛机场在内的青岛城阳区和即墨区局地出现大暴雨,甚至特大暴雨天气。

Using Doppler radar data,Kuihua 8 satellite cloud image,conventional observation data and automatic station data,a heavy rainstorm weather process occurred at Qingdao Airport on August 25-26,2020outside the typhoon was analyzed.It is found that the circulation background around the typhoon was the main factor for the rainstorm weather in Qingdao Airport.Although the warm and humid air and cold air brought by the peripheral circulation of the typhoon intersect in the central region of Shandong,forming a large-scale and long-term main rain belt,the Qingdao area was affected by the typhoon's trough,and there was continuous generation of convective cloud clusters,which strengthen their development in the process of moving towards the northwest.Due to the windward slope effect caused by the terrain of Laoshan Mountain in Qingdao,and the good water vapor conditions in Qingdao on the 26th,especially the water vapor flux divergence of-26 g/(cm2·hPa·s) was conducive to the continuous heavy rainfall in Qingdao,making heavy rainstorm and even extremely heavy rainstorm in Chengyang District and Jimo District,including Qingdao Airport.