南疆西部一次强降雨的多普勒天气雷达分析

应用常规天气图和喀什CINRAD／CC多普勒天气雷达回波资料对2008年lO月8—9日发生在南疆西部偏北的区域性强降雨进行分析。发现：本次降水是在有利环境场下，先出现局地对流雷阵雨然后转为混合型降水，强降水是混合型降水回波中由中尺度对流发展所致，具有范围小、时间集中、中尺度雨团活跃等特点。组合反射率因子较好地反映了中小尺度发展的全过程；径向速度较好地反映了气流的变化及逆风区；风廓线可很好描述各层风向风速的演变。

Analysis on the Doppler Echo of a Strong Rain in the Western South-Xinjiang

Based on the routine weather data and CINRAD Doppler radar echo, we analyzed the strong rain during 8--9 October 2008 in the Western South-Xinjiang. Under the favorable circulation field, local convective rain converted to mixed rainfall. The heavy rain resulted from middle-scale convention development in the combined rain echo. It was characterized by small range, high intensity, and active middle-scale rain mass. Combined reflectivity factor reflected the process of small to mid scale development. Radial velocity refelected air current change and antiwind area. Wind profile described the development of wind direction and speed of different layer.