激光雨滴谱仪与自动气象站观测雨量对比分析

介绍了LNM激光雨滴谱仪的构成及原理,对由激光雨滴谱仪和自动气象站同步观测所获取的雨量资料进行对比分析,并结合新一代多普勒雷达基数据提供的反射率因子与雨量作对比分析。结果表明,两种仪器探测到的雨强随时间变化趋势较为一致,但变化幅度差异大,激光雨滴谱仪探测到的雨强最大值远大于自动气象站测得的最大值且出现时间要提早些;两种仪器观测到的雨量资料与观测点处雷达反射率因子的对比表明,激光雨滴谱仪探测到的雨量与雷达反射率因子有更好的一致性。

Comparison of Rainfall Measurement between Laser Raindrop Spectrometer and Automatic Meteorological Station

The structure and measuring principles of laser raindrop spectrometers are described, and comparison is conduced between rainfall measurements observed synchronously by a laser raindrop spectrometer and automatic meteorological station. The relationship between rainfall and radar reflectivity obtained by a new generation Doppler Rader is discussed. It is found that the temporal variation tendencies of the rainfall intensities observed by the laser raindrop spectrometer and automatic meteorological station are similar, but the variances of the intensities are different. The maximum rainfall intensity observed by the laser raindrop spectrometer is much larger than that obtained by the automatic meteorological station, and the appearing time observed by the laser raindrop spectrometer is much earlier. Through contrastive analyse between the two kinds of rainfall measurements with radar reflectivity, it is concluded that the rainfall probed by the laser raindrop spectrometer in good accord with radar reflectivity.