弓状雷达回波的个例分析

文章介绍了在一次强风暴系统的雷达探测中发现的弓状回波，讨论了回波的性质、结构及其成因，分析了它与中尺度系统的关系。表明藤田模式也适用于中尺度系统，并指出气旋式运动和反气旋式运动分别出现在逗号状回波的转动头部和尾部。尾部的向前移动方式是传播性的，且与近地层气流的辐散辐合紧密联系。

A Case Analysis of Bow Radar Echo Observation

A bow echo found in a radar observation of a severe storm is described. The characteristics, formation and structure of this echo are discussed, and the relation with the mesoscale system is analysed. It is shown that Fujita model is also suitable to mesoscale system. It is pointed out that cyclonic and anticyclonic motions would appear in the rotating head part and tail part of the bow echo, respectively. The forward movement of the tail is in a way of propagation and closely linked with divergence and convergence of near surface flow.