深圳市高影响天气的风廓线雷达特征

利用深圳多年风廓线雷达观测资料,分析了灰霾、大雾、高温、雷暴、台风、冷空气等高影响天气过程中的风廓线特征。结果表明风廓线雷达作为一种新型的探测工具,能够在垂直方向获取较高时间、空间分辨率的实时资料,为分析、预报预警高影响天气提供了新的资料和观测事实。不同的高影响天气风廓线特征各不相同。灰霾和高温以上空出现东北风为特征:大雾的水平、垂直方向分布与信噪比有关;雷暴等强对流天气具有明显的风垂直切变;热带气旋、西风槽和锋面等移动性天气系统,其风向、风速的垂直分布随时间有明显变化。

The Wind Profiler Features of High Impact Weather Events in Shenzhen

The wind profiler features of high impact weather events, including haze, heavy fog, high temperature, thunderstorm, typhoon, and cold air etc. , are investigated based on years of wind profiler data in Shenzhen. The results show that the wind profiler can provides new data and observational facts for analyzing, forecasting and early warning high impact weather events with real time data of high time and space resolution in the vertical direction. The wind profiler features vary for different high impact weather events. The haze and high temperature are featured with the northeast wind high in the upper air. The distribution of the fog is related to the signal - to - noise ratio. The severe convection, like thunderstorm, shows significant vertical wind shear. For the moving weather system, like tropical cyclone, westerly trough and front, obvious change with time can be detected in vertical distribution of wind.