激光雷达探测整层大气昼夜气溶胶光学厚度

为丰富整层大气气溶胶光学厚度测量手段， 提出了一种综合微脉冲激光雷达与地面能见度测量数据的探测 方法。该方法首先利用激光雷达数据反演得到气溶胶垂直消光系数廓线， 据此计算出气溶胶标高； 再利用能见度和 消光系数的关系得到近地面水平方向的消光系数； 最后， 将近地面消光系数和标高结合， 从而得到整层大气气溶胶光 学厚度。将该方法应用于合肥地区， 成功得到该地区整层大气气溶胶光学厚度的昼夜变化趋势， 验证了该方法的可 适应性。

Lidar detection of diurnal variation of whole atmosphere aerosol optical depth

In order to enrich the measurment methods of aerosol optical depth of the whole atmosphere layer, a detection method integrating micro-pulse lidar and surface visibility data is proposed. In the method, the aerosol vertical extinction coefficient profile is retrieved from lidar data firstly, and the aerosol scale height is calculated accordingly. Then, the relationship between visibility and extinction coefficient is used to obtain the surface horizontal extinction coefficient. Finally, the aerosol scale height is combined with surface extinction coefficient to obtain the aerosol optical depth of the entire atmosphere. This method was applied to Hefei area, China, and the diurnal variation trend of the entire atmospheric aerosol optical depth in this area was succesfully obtained, which verifies the applicability of the method.