Journal of Atmospheric and Environmental Optics ›› 2021, Vol. 16 ›› Issue (3): 239-246.

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Retrieval of Aerosol Optical Depth Over Parts of China Land Based on Directional Polarimetric Camera

#br# TI Rufang1∗, HUANG Honglian1, LIU Xiao1, FAN Yizhe1,2, WANG Jiajia1,2, SUN Xiaobing1, HONG Jin1   

  1. 1 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China
  • Received:2020-10-30 Revised:2021-01-22 Online:2021-05-28 Published:2021-05-28

Abstract: Atmospheric aerosol is an important influence factor of climate change and remote sensing quantification, so it is of great significance to study aerosol optical properties. Based on the measurements of directional polarimetric camera (DPC) onboard GF-5 satellite over China, the retrieval of aerosol optical depth (AOD) is carried out. Based on the vector radiative transfer model 6sv, a look-up table of aerosol optical properties is constructed. Then the contribution of land surface is calculated by Ross Li surface BRDF model and semi empirical NB model. Finally, AOD is retrieved by using multi angle information of intensity and polarization and look-up table method. It is found that the retrieval results of DPC aerosol optical depth are in good agreement with the observation results of AERONET ground stations in China, the linear fitting degree is good and the correlation coefficient is greater than 0.8, which verifies the reliability of the algorithm. And it is believed that the development of the algorithm provides technical support for DPC to effectively monitor the spatial and temporal distribution of aerosols.

Key words: directional polarimetric camera, retrieval, aerosol, optical thickness

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