淮河流域一次强对流性天气过程的遥感分析

Analysis of a convective weather process based on remote sensing data in the Huaihe River basin

利用气象卫星红外遥感资料和新一代多普勒天气雷达微波探测信息,对2008年7月22日发生在淮河流域的一次暴雨强对流性天气过程进行分析,了解两种探测结果间存在的异同点。结果表明:虽然气象卫星在时空分辨率上不如天气雷达直观,但从卫星云图上可以观测到在雷达回波图中无法分析的大尺度天气背景,且通过Tir=Twv线所处位置的分析,能够跟踪对流系统的发展趋势。而从高时空分辨率的雷达回波强度分布以及径向速度中,则可以清晰地观测到系统的小尺度变化特征以及不同高度的径向速度特征。综合两种探测信息可以相互弥补不足,提取到更多的有效信息。

Based on the remote sensing data from the meteorological satellite and new generation weather Doppler radar,a strong convective storm rain case on July 22,2008 was analyzed in the Huaihe River basin,and the similar- ities and differences of two remote sensing methods were discussed. The result indicate that the large scale weather background could be observed on the satellite cloud image in spite of its resolution is low compared with that of weather radar. The evolution trend of convective system could be analyzed in terms of the locations of contour line of Tir = Two. The radar echo intensity has higher temporal and spatial resolutions, so the small scale features of con- vective system and radical velocity in the different heights could be observed in terms of Doppler weather radar. Two methods could assist each other, so more effective information could be obtained if both are combined.