利用一台研制的机载双波长米氏散射激光雷达，对京津冀地区大气气溶胶的三维空间分布进行了探测。给出了其中一次较典型的观测实验，该架次航线与边界层内的气流方向垂直，有利于获取区域尺度上气溶胶分布的剖面信息。观测结果显示，京津冀腹地密集的污染排放源，结合气流对气溶胶的输送和扩散作用，导致观测期间该地区形成了大范围区域立体污染。通过分析典型污染源周边的气溶胶分布，研究了重污染源排放的气溶胶随气流扩散的过程。初步的飞行实验结果表明，该激光雷达性能稳定，可以为污染源的识别以及污染物传输路径的探测提供高空间分辨率的数据。

An airborne two-wavelength polarization Mie lidar is designed for detecting three-dimensional (3-D) distributions of atmospheric aerosols at Jing-Jin-Ji area. One typical field campaign is described. The flight path is perpendicular to the airstreams, which makes it ideal for observation of aerosol 3-D structure on the flight path. The observation result of the aerosol distribution during the flight shows that regional three- dimensional air pollution has formed around Jing-Jin-Ji area, due to densely pollutant source and air-flow diffusion. The diffusion process of the aerosol emission from one typical heavy pollution source is given using the aerosol distribution data around it. The preliminary result shows that this airborne lidar provides a unique airborne remote sensing platform for monitoring the aerosol distribution over a wide region.