北京地区强对流天气雷达回波特征

通过近 2年的观测 ,收集了一些新的、不同类型的强天气个例的回波资料。对其中典型个例的分析可以得到北京地区的一些强天气的雷达回波特征。冰雹、雷雨大风回波高度高 ,达 1 2km ,暴雨过程回波高度仅 7km ;冰雹、雷雨大风这类强对流天气的雷达回波移动速度快 ,而局地暴雨的雷达回波移动速度缓慢。通过对多普勒径向速度图的分析 ,可以得出冰雹、雷雨大风与暴雨的动力结构有着明显的差异。地形的影响是显著的

Radar Echo Features of Severe Weather in Beijing

Based on two-year radar data of severe weather in Beijing,echo characteristics of severe storm are studied. The echo top of severe storms such as hailstorms and thunderstorms accompanied by gale is higher than that of heavy rain,the former is up to 12km. However,the latter is only 7km.Comparing with local heavy rain, the movement of radar echoes of hailstorms and thunderstorms is rapid. Based on analyzing the radial velocity, it is concluded that the dynamic structure of hailstorms and thunderstorms is quite different from that of the heavy rain. Moreover,the influence of topography is also very significant.