摘要：为研究沙尘暴的垂直分布及变化过程，在介绍偏振微脉冲激光雷 达原理的基础上展示了自主研发的雷达系统。 利用该系统监测了一次 沙尘暴过程，通过分析这次沙尘过程的变化特点，认为此次过程包含有 地面扬沙和高空输送两部分。数据分析表明，偏振微脉冲激光雷达具有 较强的沙尘探测能力， 可以直接反映沙尘垂直结构的分布状况和演变 特征。 

关键词：沙尘暴；激光雷达；退偏比

Abstract：To study the vertical distribution of dust storms and changes in process，based on the theoretics of polarization micro-pulse lidar，a new li dar system developed was shown. One course of the sand and dust was ob served by the lidar system. The data analysis revealed that the characteris tics of the sand and dust contained two parts. One was brought by the wind from ground，the other was brought by the wind from other areas. The data analysis indicated that the polarization micro-pulse lidar possessed great ability on observes the sand and dust，the lidar could be used to detect the vertical profiles and evolution characteristics of the dust storms. 

Keywords：sand and dust；lidar；depolarization ratio