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Evaluation of JAXA Himawari-8-AHI Level-3 aerosol products over eastern China

Li, Ding and Qin, Kai and Wu, Lixin and Xu, Jian and Letu, Husi and Zou, Bin and He, Qin and Li, Yifei (2019) Evaluation of JAXA Himawari-8-AHI Level-3 aerosol products over eastern China. Atmosphere, 10 (4), 215/1-215/16. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/atmos10040215 ISSN 2073-4433

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Official URL: https://www.mdpi.com/2073-4433/10/4/215

Abstract

A novel geostationary satellite, the H8/AHI (Himawari-8/Advanced Himawari Imager), greatly improved the scan times per day covering East Asia, and the operational products have been stably provided for a period of time. Currently, atmospheric aerosol pollution is a major concern in China. H8/AHI aerosol products with a high temporal resolution are helpful for real-time monitoring of subtle aerosol variation. However, the H8/AHI aerosol optical thickness (AOT) product has been updated three times since its launch, and the evaluation of this dataset is currently rare. In order to validate its accuracy, this study compared the H8/AHI Level-3 (L3) hourly AOT products of all versions with measurements obtained from eleven sunphotometer sites located in eastern China from 2015 to 2018. Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 6 AOT products from the same period were also used for inter-comparison. Although the H8/AHI AOT retrievals in version 010 show a moderate agreement with ground-based observations (correlation coefficient (R): 0.66-0.85), and the time series analysis shows that it can effectively monitor hourly variation, it suffers from an obvious underestimation of 0.3 compared to ground-based and MODIS observations. After the retrieval algorithm updated the predefined aerosol model, the overall underestimation of AHI AOTs was solved (version 010 slope: 0.43-0.62, version 030 slope: 0.75-1.02), and the AOTs in version 030 show a high agreement with observations from ten sites (R: 0.73-0.91). In addition, the surface reflectance dataset derived from the minimum reflectivity model in version 010 is inaccurate in parts of eastern China, for both “bright” and “dark” land surfaces, which leads to the overestimation of the AOT values under low aerosol loads at the Beijing and Xianghe sites. After the update of the surface dataset in version 030, this phenomenon was alleviated, resulting in no significant difference in scatterplots under different surface conditions. The AOTs of H8/AHI version 030 show a significant improvement compared to the previous two versions, but the spatial distribution of AHI is still different from MODIS AOT products due to the differences in sensors and algorithms. Therefore, although the evaluation in this study demonstrates the effectiveness of H8/AHI AOT products for aerosol monitoring at fine temporal resolutions, the performance of H8/AHI AOT products needs further study by considering more conditions.

Item URL in elib:https://elib.dlr.de/127332/
Document Type:Article
Title:Evaluation of JAXA Himawari-8-AHI Level-3 aerosol products over eastern China
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Li, DingSchool of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, ChinaUNSPECIFIED
Qin, KaiSchool of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, ChinaUNSPECIFIED
Wu, LixinSchool of Geoscience and Info-Physics, Central South University, Changsha, ChinaUNSPECIFIED
Xu, Jianjian.xu (at) dlr.dehttps://orcid.org/0000-0003-2348-125X
Letu, HusiInstitute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, ChinaUNSPECIFIED
Zou, BinSchool of Geoscience and Info-Physics, Central South University, Changsha, ChinaUNSPECIFIED
He, QinSchool of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, ChinaUNSPECIFIED
Li, YifeiSchool of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, ChinaUNSPECIFIED
Date:22 April 2019
Journal or Publication Title:Atmosphere
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
DOI :10.3390/atmos10040215
Page Range:215/1-215/16
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2073-4433
Status:Published
Keywords:Himawari-8; AOD; sunphotometer; MODIS; eastern China
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Remote sensing and geoscience
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Xu, Dr.-Ing. Jian
Deposited On:06 May 2019 15:14
Last Modified:14 Dec 2019 04:22

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