Publications

Tan, YH; Li, EG; Zhang, ZY; Lin, XW; Chi, YG; Zhou, L; Wu, CF; Wang, Q (2019). Validation of POLDER-3/GRASP aerosol products using AERONET measurements over China. ATMOSPHERIC ENVIRONMENT, 215, 116893.

Abstract
The third generation of Polarization and Directionality of Earth Reflectance instrument (POLDER-3) aerosol products provide aerosol optical depth (AOD), fine aerosol optical depth (AODF), coarse aerosol optical depth (AODC), absorbed aerosol optical depth (AAOD), the angstrom ngstrom exponent (AE), complex refractive index (CRI, CRI = n + i kappa) and single scattering albedo (SSA). These properties are essential for understanding the effects of aerosol on climate changes. However, the performance of those aerosol optical properties has not been validated in China. This study provides the first validation of all the POLDER-3/GRASP aerosol optical properties using ground measurements at 15 AErosol RObotic NETwork (AERONET) stations over China. The comparison shows that the correlation coefficient is 0.9530/0.9587/0.6371/0.5566/0.09/0.5835/0.6834 between POLDER-3/GRASP AOD/AODF/AAOD/AODC/n/kappa/SSA and that of AERONET stations. There are less than 49.9%/85.9%/54.4% of the AOD/AODF/AODC values falling within the Expected Error (EE, +/- (0.05 + 15%)) envelopes. The performance of POLDER-3 AOD is close to the MODIS and VIIRS dark-target (DT) AOD. The monthly POLDER-3 AOD are overestimated and SSA are underestimated in SACOL and Xianghe. Different land cover types affect the AODC retrieval significantly and high aerosol loading (AOD > 1) will cause the underestimation of AOD. These results indicate that the POLDER-3 aerosol product is more sensitive to fine aerosol type.

DOI:
10.1016/j.atmosenv.2019.116893

ISSN:
1352-2310