中文摘要：

中国科学院大气物理研究所研制了一台双波长偏振激光雷达,在格尔木市气象局进行了为期一年的不连续观测。本文选择了其中一天的观测个例,分别从雷达硬件结构、数据类型、数据处理方法等方面进行了系统的介绍和分析。结果表明,此次观测个例中,卷云位于地表以上4.7 km-7 km处,光学厚度均小于0.1,532 nm和1064 nm上的平均激光雷达比分别为24.3 Sr（激光雷达比）和29.9 Sr,色比多集中在0.8-1之间,此外532 nm波长上的退偏比多集中在0.25-0.3之间。此雷达对高空卷云能进行有效探测,为下一步研究青藏高原地区卷云长期时空分布特征奠定基础。

英文摘要：

A two-wavelength polarization lidar, developed by the Institute of Atmospheric Physics, Chinese Academy of Sciences, was used to measure cirrus cloud over Geermu City from December 2013 to December 2014. In this paper, the authors first introduce the lidar structure and data type, as well as the data processing methods. Then, a particular observation case is used to discuss the characteristics of the cirrus cloud. The results showed that the cirrus cloud was located from 4.7 km to 7 km, with a small optical depth of less than 0.1. The mean lidar ratios at 532 nm and 1064 nm were 24.3 Sr and 29.9 Sr, respectively, and the color ratio was concentrated between 0.8 and 1. The depolarization ratio measured for this case of cirrus cloud varied from 0.1 to 0.4, with maximum frequency between 0.25 and 0.3. This lidar has the ability to measure cirrus cloud, and can be used to study the long-term spatial and temporal distribution of cirrus cloud over the Tibetan Plateau.