Assessment of Himawari-8 AHI Aerosol Optical Depth Over Land ...

• Main Authors: Zhang, Wenhao, Xu, Hui, Zhang, Lili
• Format: Text
• Language: English
• Published: MDPI 2019
• Subjects: aerosol optical depth; Himawari-8; AHI; AERONE; assessment; Aerosol Robotic Network
• Online Access: https://dx.doi.org/10.13016/dspace/narr-alsh; https://drum.lib.umd.edu/handle/1903/31419

This study conducted the first comprehensive assessment of the aerosol optical depth (AOD) product retrieved from the observations by the Advanced Himawari Imager (AHI) onboard the Himawari-8 satellite. The AHI Level 3 AOD (Version 3.0) was evaluated using the collocated Aerosol Robotic Network (AERONET) level 2.0 direct sun AOD measurements over the last three years (May 2016–December 2018) at 58 selected AERONET sites. A comprehensive comparison between AHI and AERONET AOD was carried out, which yielded a correlation coefficient (R) of 0.82, a slope of 0.69, and a root mean square error (RMSE) of 0.16. The results indicate a good agreement between AHI and AERONET AOD, while revealing that the AHI aerosol retrieval algorithm tends to underestimate the atmospheric aerosol load. In addition, the expected uncertainty of AHI Level 3 AOD (Version 3.0) is ± (0.1 + 0.3 × AOD). Furthermore, the performance of the AHI aerosol retrieval algorithm exhibits regional variation. The best performance is reported over East ...