卫星资料在云顶粒子尺度特征分析中的应用

USING SATELLITE DATA TO ANALYZE PROPERTIES OF CLOUD PARTICLES SIZE ON THE TOP OF CLOUD

选取NOAA卫星AVHRR通道 3(3 5 5～ 3 93μm)观测资料 ,分析云顶粒子的物理性质 ,并用地面雨量和雷达观测资料对卫星反演分析结果进行验证 .分析结果显示通道 3反射率小 ,云顶粒子尺度大时易产生降水 .当云层为单一层次时 ,通道 3的反射率小值区与雷达回波区间具有良好的对应关系 ,证实了在降水过程中卫星分析云顶粒子尺度结果与雷达观测一致 .

Physical properties of cloud particles on the top of cloud were analyzed by NOAH/AVHRR channel 3(3.55similar to3.93 mum) data. Radar and precipitation data were used to validate the analysis results. It was showed that clouds with smaller reflectivity at channel 3 and with bigger size were easy to rain. It was found that there was good corresponding relationship between small reflectivity at channel 3 and radar echo when cloud is a single layer. It was testified that the result of size analyzed from satellite was the same as that from radar data during precipitation.