Journal article
Controlling factors analysis for the Himawari-8 aerosol optical depth accuracy from the standpoint of size distribution, solar zenith angles and scattering angles
Atmospheric environment (1994), Vol.233, p.117501
07/15/2020
DOI: 10.1016/j.atmosenv.2020.117501
Abstract
This work aims at providing a novel controlling factors analysis for the Advanced Himawari Imager (AHI) AOD retrieval from the aspect of particle size distribution and Sun-Earth-Satellite geometries, through combining the high quality ground-based observation in Wuhan. The three-years co-located AOD dataset of AHI and sun-photometer in Wuhan are used to support this work. AHI overall underestimates AOD over Wuhan site with coefficient of determination (R2) equal 0.7. Though the best retrieval appeared in summer, underestimation is found to be persistent in each season. Combining with the characteristics of aerosol hygroscopic growth in Wuhan, we found the fine-mode particle median radius which supposed by AHI is lower than the in-site measurement. This leads to the overestimation of back scattering by aerosol particles, and induces underestimation of AOD consequently. The correlation and bias analyses of AOD with respect to the variation of Solar Zenith Angle and scattering angles are also performed. Phase function derived by sun-photometer is applied to discuss the influence of scattering angle on AOD inversion. Accompany with the scattering angle, the AOD retrieval bias consistently varies with the phase function bias, which further confirm the impact of phase function on AHI retrieval. Finally, the dark target method was applied to retrieve AHI AOD. The comparison results show that dark target overestimated AOD and performed worse in Wuhan. It could reveals that AHI aerosol retrieval method has some advantages in heavy aerosol loading places without enough prior information of aerosol properties.
•The lower default fine-mode median radius is one of the main reason which leads the underestimate of AHI AOD.•Comparison with in situ data reveals that the phase function greatly affects the AOD retrieval.•The dark target method was introduced for AHI retrieval, showing poor performance in high AOD condition.
Details
- Title: Subtitle
- Controlling factors analysis for the Himawari-8 aerosol optical depth accuracy from the standpoint of size distribution, solar zenith angles and scattering angles
- Creators
- Ming Zhang - Hubei Key Laboratory of Critical Zone Evolution, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, ChinaYingying Ma - State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, ChinaYifan Shi - School of Mathematics and Statistics, Wuhan University, ChinaWei Gong - State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, ChinaShihua Chen - School of Mathematics and Statistics, Wuhan University, ChinaShikuan Jin - State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, ChinaJun Wang - Department of Chemical and Biochemical Engineering, , Center for Global & Regional Environmental Research, The University of Iowa, Iowa City, IA 52242, USA
- Resource Type
- Journal article
- Publication Details
- Atmospheric environment (1994), Vol.233, p.117501
- DOI
- 10.1016/j.atmosenv.2020.117501
- ISSN
- 1352-2310
- eISSN
- 1873-2844
- Publisher
- Elsevier Ltd
- Grant note
- DOI: 10.13039/501100012166, name: National Key R&D Program of China, award: 2018YFB0504500, 2017YFC0212600; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China, award: 41905032, 41875038, 41801261, 41627804; DOI: 10.13039/501100003819, name: Natural Science Foundation of Hubei Province, award: 2017CFB404; name: Wuhan Science and Technology Plan, award: 2019020701011453; DOI: 10.13039/501100007046, name: Wuhan University; DOI: 10.13039/501100004020, name: Japan Aerospace Exploration Agency; name: National Institute of Environmental Studies; DOI: 10.13039/501100013251, name: Institute of Remote Sensing and Digital Earth; DOI: 10.13039/501100002367, name: Chinese Academy of Sciences
- Language
- English
- Date published
- 07/15/2020
- Academic Unit
- Electrical and Computer Engineering; Civil and Environmental Engineering; Physics and Astronomy; Chemical and Biochemical Engineering
- Record Identifier
- 9984066351302771
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