2014年7月16日朝阳市龙城区大到暴雨过程分析

Analysis on the Heavy-hard Rain Process of July 16,2014 in Longcheng District of Chaoyang City

利用天气图、物理量场、卫星云图等方式,对2014年7月16日龙城地区一次典型的大到暴雨天气过程进行综合分析。结果表明:该过程是一次由高空槽东移和稳定的副高叠加共同影响的一次明显的天气过程,副热带高压呈带状西伸到我国华南地区。我国北方地区有深厚的高空槽东移与副高西北侧叠加,强大的副高中心位于西北太平洋。伴随高空低涡后部冷空气下摆,在内蒙东部有很强的冷式切变和暖式切变旋转,黄河流域和长江流域有切变存在,自北向南3个冷式切变与副高后部叠加,气压梯度加强,形成一条强风速低空急流,不断将南海水汽沿途向龙城区输送。水汽条件和动力条件配置有利,造成此次强烈的降水过程。

Using synoptic chart,physical quantity field and satellite cloud image to analyze a typical precipitation weather process on July 16,2014 in Longcheng District.The experiment results were as follows ：The process was an apparent weather process of nmtuaL influence by the upper trough eastward and stable subtropical high overlay,a subtropical high strip west extended in south China region.ln north China that had deep upper trough eastward and superposition of subtropical high northwest edge,strong subtropical high center was located in the Pacific northwest.With high altitude low vortex hem at the back of the cold air,in the eastern Inner Mongolia has a strong cold type shear warm shear spinning.The Yellow River and the Yangtze river basin had shear existed,from north to south three cold type shears and subtropical high at the back of the overlay,the pressure gradient in strengthening,h）rm a strong wind speed low level jet,vapor was unceasingly trmlsported to Longcheng District along the route of the south China sea.Water vapor conditions and dynamic conditions were favorable, resulting in the strong precipitation process.