First high temporal resolution retrievals of AOD over shallow and turbid coastal waters for Himawari-8

Yi Wang; Zibo You; Lunche Wang; Jun Wang; Meng Zhou; Minghui Tao; Jhoon Kim

doi:10.1016/j.isprsjprs.2025.07.027

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First high temporal resolution retrievals of AOD over shallow and turbid coastal waters for Himawari-8

Journal article

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First high temporal resolution retrievals of AOD over shallow and turbid coastal waters for Himawari-8

Yi Wang, Zibo You, Lunche Wang, Jun Wang, Meng Zhou, Minghui Tao and Jhoon Kim

ISPRS journal of photogrammetry and remote sensing, Vol.228, pp.603-612

10/2025

DOI: 10.1016/j.isprsjprs.2025.07.027

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Abstract

Although the operational Himawar-8 Aerosol Retrieval Product (ARP) can resolve diurnal variation of aerosol loading, the ARP Aerosol Optical Depth (AOD) retrievals are significantly overestimated over Shallow and Turbid Coastal Waters (STCW) as water-leaving radiance is not explicitly considered in the retrieval process. Taking the advantage that 2.3 μm water-leaving radiance from STCW is insignificant, we developed a Himawari-8 Coastal Water AOD retrieval approach (CW) by using 2.3 μm Top of Atmosphere (TOA) reflectance and the aerosol properties of the nearest open ocean pixel. Unlike the abnormally large ARP AOD retrievals over STCW, the CW algorithm yields a smooth transition among land, coast, and open ocean over Asia and increases the number of AOD retrievals by more than 10 %, depending on the variation of coastal regions. Validation against Marine Aerosol Network measurements over STCW show that 65.5 % of CW retrievals are within the expected error envelope (± (0.05 + 15 %AOD)), compared with 56.5 % for ARP, and this improvement is independent of observational geometry and terrain. Moreover, CW AOD retrievals over STCW can well capture the diurnal variation observed by Aerosol Robotic Network while ARP cannot. As to seasonal variation, CW AOD over the STCW of East China increases in spring and peaks in June, while the coverage of abnormally large ARP AOD follows the temporal change of turbid coastal waters area with a maximum occurring in winter.

Aerosol Optical Depth

Coastal Waters

High Temporal Resolution

Himawar-8

Details

Title: Subtitle: First high temporal resolution retrievals of AOD over shallow and turbid coastal waters for Himawari-8
Creators: Yi Wang - China University of Geosciences
Zibo You - China University of Geosciences
Lunche Wang - China University of Geosciences
Jun Wang - Department of Chemical and Biochemical Engineering, The University of Iowa, Iowa City, IA 52242, USA
Meng Zhou - University of Maryland, Baltimore County
Minghui Tao - China University of Geosciences
Jhoon Kim - Yonsei University
Resource Type: Journal article
Publication Details: ISPRS journal of photogrammetry and remote sensing, Vol.228, pp.603-612
DOI: 10.1016/j.isprsjprs.2025.07.027
ISSN: 0924-2716
eISSN: 1872-8235
Publisher: Elsevier B.V
Number of pages: 10
Grant note: National Natural Science Foundation of China: 42201409 China University of Geosciences (Wuhan): G1323523063
This research was supported by the National Natural Science Foundation of China (Grant No. 42201409) and the Fundamental Research Funds (No. G1323523063) for the Central Universities, China University of Geosciences (Wuhan). Jun Wang's contribution was made available with helps from the University of Iowa.
Language: English
Date published: 10/2025
Academic Unit: Electrical and Computer Engineering; Civil and Environmental Engineering; Iowa Technology Institute; Physics and Astronomy; Chemical and Biochemical Engineering
Record Identifier: 9984944727602771

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