Abstract

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 ${{\rm PM}_{2.5}}$ 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 ${{\rm PM}_{2.5}}$ 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 ${{\rm PM}_{2.5}}$ concentrations and ${{\rm PM}_{2.5}}$ concentrations measured by the in situ instrument show a high correlation. The correlation coefficient reaches 0.850.

© 2020 Optical Society of America

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