为了研究卷云的特征，我们利用L300米散射激光雷达对安徽省合肥地区(31．90°N，117．16°E)的高层卷云进行探测。这些卷云是在晴朗夜晚激光雷达进行对流层气溶胶常规测量的同时探测到的。分析讨论了卷云的结构、光学性质及其它们的时间变化特征。结果表明：该地区卷云的云峰主要分布在8～11 km范围之内，卷云的结构呈现一定的季节变化特征。

In order to study the characteristics of cirrus,high-altitude cirrus clouds over Hefei,Anhui(31.90°N,117.16°E)were observed by L300 Mie lidar. These cirrus clouds were simultaneously detected when the lidar took regular nighttime measurements of tropospheric aerosol. The structures and optical properties of the cirrus clouds as well as their time variation are discussed and analysed. Our results show that the peak of cirrus over this area range mainly from 8 km to 11 km,and their structures change with season as well.