A Coupled BRDF CO2 Retrieval Method for the GF-5 GMI and Improvements in the Correction of Atmospheric Scattering

doi:10.3390/rs14030488

	A Coupled BRDF CO2 Retrieval Method for the GF-5 GMI and Improvements in the Correction of Atmospheric Scattering
	Ye, Hanhan 1; Shi, Hailiang 1; Li, Chao 1,2; Wang, Xianhua 1; Xiong, Wei 1; An, Yuan 1,2; Wang, Yue 1,2; Liu, Liangchen 1,2
刊名	REMOTE SENSING
	2022-02-01
卷号	14
关键词	CO2 retrieval CBCR method BRDF GMI AOD prior constraints TCCON
DOI	10.3390/rs14030488
通讯作者	Shi, Hailiang(hlshi@aiofm.ac.cn)
英文摘要	The Greenhouse Gases Monitoring Instrument (GMI), on board the Chinese Gaofen-5 (GF-5) satellite, provides rich observation data for the global remote sensing of atmospheric CO2. To meet the high-precision satellite retrieval needs of atmospheric CO2, this paper designs a coupled bidirectional reflectance distribution function (BRDF) CO2 retrieval (CBCR) method, which describes the surface reflectance characteristics by the BRDF, corrects for atmospheric scattering based on full physics retrieval theory, and ensures the stable retrieval of multiple parameters and atmospheric CO2 by enriching prior constraints. Theoretical analysis shows that the influence of atmospheric scattering induced by the surface bidirectional reflectance characteristics is significantly related to the aerosol optical depth (AOD), solar zenith angle (SZA), and viewing zenith angle (VZA). The validation of GMI CO2 retrievals shows that the CBCR method significantly reduced the influence of the surface bidirectional reflectance characteristics under high AOD and high SZA conditions, decreased the atmospheric CO2 retrieval error from 0.58 +/- 5.64 ppm to -1.33 +/- 3.13 ppm, and increased the correlation with the temporal variation of actual atmospheric CO2 from 34.7 to 76.8%. Our CBCR method can correct the influence of atmospheric scattering induced by the surface bidirectional reflectance characteristics on atmospheric CO2 retrieval, and this work demonstrates that describing the surface reflectance characteristics by using BRDF is a promising idea in the field of satellite CO2 retrievals.
资助项目	National Key Research and Development Program[2017YFB0504000] ; National Key Research and Development Program[2017YFB0504001] ; Key Programs of the Chinese Academy of Sciences[ZDRW-KT-2020-3] ; Civil Aerospace Technology Advance Research Program[D040102] ; Key Supporting Projects of Hefei Research Institute in the 13th Five-Year Plan[Y73H9P1801]
WOS关键词	ORBITING CARBON OBSERVATORY-2 ; SATELLITE ; SPACE ; UNCERTAINTIES ; ALGORITHM ; DIOXIDE ; MODEL
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	MDPI
WOS记录号	WOS:000757317700001
资助机构	National Key Research and Development Program ; Key Programs of the Chinese Academy of Sciences ; Civil Aerospace Technology Advance Research Program ; Key Supporting Projects of Hefei Research Institute in the 13th Five-Year Plan
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127775]
专题	中国科学院合肥物质科学研究院
通讯作者	Shi, Hailiang
作者单位	1.Chinese Acad Sci, Key Lab Gen Opt Calibrat & Characterizat Technol, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Grad Sch Univ Sci & Technol China, Scinece Isl Branch, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Ye, Hanhan,Shi, Hailiang,Li, Chao,et al. A Coupled BRDF CO2 Retrieval Method for the GF-5 GMI and Improvements in the Correction of Atmospheric Scattering[J]. REMOTE SENSING,2022,14.
APA	Ye, Hanhan.,Shi, Hailiang.,Li, Chao.,Wang, Xianhua.,Xiong, Wei.,...&Liu, Liangchen.(2022).A Coupled BRDF CO2 Retrieval Method for the GF-5 GMI and Improvements in the Correction of Atmospheric Scattering.REMOTE SENSING,14.
MLA	Ye, Hanhan,et al."A Coupled BRDF CO2 Retrieval Method for the GF-5 GMI and Improvements in the Correction of Atmospheric Scattering".REMOTE SENSING 14(2022).