中文摘要：

为了研究合肥地区大气边界层结构变化特征,利用偏振拉曼-米散射激光雷达进行了连续探测。首先介绍利用激光雷达回波信号提取大气边界层高度的梯度法,并分析该方法的优缺点。然后对梯度法进行修正,给出具体的实例分析及对比结果。最后利用修正后的梯度法对激光雷达连续测量数据进行大气边界层高度提取,得到合肥地区观测站上空大气边界层的高度分布及时间变化特征。结果表明,实验期间合肥地区的大气边界层高度主要分布在1～1.5 km范围内,平均高度约为（1.28±0.2）km。

英文摘要：

In order to study the changes of the atmospheric boundary layer＇s structure polarization-Raman-Mie scattering lidar system is operated automatically and continuously. in Hefei, the The gradient method used to extract the height of atmospheric boundary layer from lidar data is introduced and analyzed. The modified gradient method is used to obtain the temporal characteristics of the height of atmospheric boundary layer in Hefei. The results show that the height of atmospheric boundary layer in Hefei ranges from 1 km to 1.5 km, and the average height is about （1.28±0.2） km during the experiment.