【摘要】 分析热带气旋北冕在厦门地区造成的暴雨过程中主要降水时段多普勒雷达资料强度场和速度场的特点。分析表明 ,这次暴雨是多种天气系统相互作用的结果。第三阶段的短时大暴雨是停滞在厦门上空的强单体直接造成的 ,对应的速度场上有低层东南风和西南风辐合 ;单体的合并也起了一定的作用 ,而且单体的分离合并与低空急流的脉动有关。更多还原

【Abstract】 By using Doppler Radar data, the characteristics of rainfall intensity and wind field in Xiamen caused by tropical cyclone “Beimian” are analyzed. The results show that the heavy rainfall is induced by the interaction of multi-synoptic systems, and by the convergence of southeast wind and southwest wind in low atmosphere as well as the cells’ mergence. In addition, the cells’ breakaway and mergence have a connection with the perturbation of the jet in low atmosphere.更多还原