Gao Jing, Pan Jie, Wang Jingjing, Cai Yangjian, Zhao Yuefeng
Appl Opt. 2020 Nov 20;59(33):10369-10379. doi: 10.1364/AO.405219.
The vertical aerosol extinction coefficient profile is the key to evaluating the aerosol radiation effect. In addition, it is also the premise of indirect inversion of concentration from the lidar signal. A novel lidar system combining tripe charge-coupled device (CCD) cameras and backscatter lidar is proposed to retrieve accurately the aerosol extinction coefficient. The relative humidity segmentation method is used to convert the aerosol extinction coefficient into concentrations. The results show that the combination of triple CCDs and backscatter lidar can obtain a wider-range extinction coefficient profile. The variation trend of fitted concentrations and concentrations measured by the in situ instrument show a high correlation. The correlation coefficient reaches 0.850.
垂直气溶胶消光系数剖面是评估气溶胶辐射效应的关键。此外，它也是从激光雷达信号间接反演浓度的前提。提出了一种结合三重电荷耦合器件（CCD）相机和后向散射激光雷达的新型激光雷达系统，以精确反演气溶胶消光系数。采用相对湿度分段法将气溶胶消光系数转换为浓度。结果表明，三重CCD与后向散射激光雷达的组合能够获得更宽范围的消光系数剖面。拟合浓度与现场仪器测量的浓度变化趋势具有高度相关性。相关系数达到0.850。
