Retrieval of aerosol fine-mode fraction over China from satellite multiangle polarized observations: validation and comparison

Abstract. The aerosol fine-mode fraction (FMF) is an important optical parameter of aerosols, and the FMF difficult to accurately retrieve by traditional satellite remote sensing methods. In this study, retrieval was carried out based on multiangle polarization data Polarization Anisotropy Reflectances for Atmospheric Science coupled with Observations from Lidar (PARASOL), which overcame shortcomings algorithm in our previous research. research, China compared AErosol RObotic NETwork (AERONET) ground-based observation results, Moderate Resolution Imaging Spectroradiometer (MODIS) products, Generalized Retrieval Aerosol Surface Properties (GRASP) results. addition, applied, a new dataset produced, annual quarterly average results 2006 2013 were obtained all China. research show that study are comparable AERONET correlation coefficient (r), mean absolute error (MAE), root square (RMSE), proportion fall within expected (Within EE) 0.770, 0.143, 0.170, 65.01 %, respectively. Compared MODIS closer observations. GRASP, spatial variation ratio PM2.5 PM10 near ground.