【摘要】 本文利用常规气象观测资料、加密自动气象站降水资料、卫星云图和SWAP强对流路径预报资料、多普勒雷达以及风廓线雷达资料,用天气动力学诊断方法,对2013年一次影响湖北省荆门地区的江淮气旋暴雨过程进行分析,结果表明:(1)此次暴雨过程是由于中高纬有高原槽发展东移,槽前正涡度平流作用使得低层西南涡加强,低层减压形成江淮气旋,气旋东移发展而产生暴雨;(2)强降雨主要集中在两个时段,分别与西南涡加强东移和江淮气旋生成有很好的对应;(3)500h Pa垂直速度表明,强上升运动区的移动方向与雨带移动方向一致;水汽通量辐合中心发展并向东北方向移动,跟强降水有直接的对应关系;(4)风廓线雷达反演的热成风温度平流变化,大气折射率常数大值中心以及SWAP的强对流云团的路径外推预报对本地强降水发生位置具有重要的指示意义。更多还原

【Abstract】 By using conventional meteorological data,the precipitation data of automatic weather station,cloud data,and radar data,the heavy rain process on the Jiang-Huai cyclone in 2013 in Jingmen is diagnosed based on the weather dynamics.The result shows that:( 1) There is the eastward propagation of trough from the high latitude,positive advection of vorticity which makes the southwest vortex strengthen,the decrease of the pressure which cause the Jiang-Huai cyclone. The Jiang-Huai cyclone move east and develop which cause the heavy rain.( 2) The two strong rainfall periods are relative to the southwest vortex’s strengthening and going east,the generation of Jiang- Huai Cyclone.( 3) The rainfall belt is well coincident with the regions of strong upward motion. The development of the maxima of convergence of moisture flux is related to the heavy rain.( 4) The thermal wind temperature advection inversed by wind profile radar,the maximum of atmosphere refractive index and the track prediction of the strong convective clouds by SWAP,have important significance on the location of local strong precipitation.更多还原