Improved Anthropogenic SO2 Retrieval from High-Spatial-Resolution Satellite and its Application during the COVID-19 Pandemic

doi:10.1021/acs.est.1c01970

	Improved Anthropogenic SO2 Retrieval from High-Spatial-Resolution Satellite and its Application during the COVID-19 Pandemic
	Xia, Congzi 2; Liu, Cheng 4,5,8,9; Cai, Zhaonan 7; Duan, Xiaonan 3; Hu, Qihou 4; Zhao, Fei 5; Liu, Haoran 6; Ji, Xiangguang 1,4; Zhang, Chengxin 5; Liu, Yi 7
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2021-09-07
卷号	55
关键词	sulfur dioxide satellite on-orbit calibration anthropogenic COVID-19
ISSN号	0013-936X
DOI	10.1021/acs.est.1c01970
通讯作者	Liu, Cheng(chliu81@ustc.edu.cn) ; Cai, Zhaonan(caizhaonan@mail.iap.ac.cn)
英文摘要	Sulfur dioxide (SO2) measured by satellites is widely used to estimate anthropogenic emissions. The Sentinel-5 Precursor (S-5P) operational SO2 product is overestimated compared to the ground-based multiaxis differential optical absorption spectroscopy (MAX-DOAS) measurements in China and shows an opposite variation to the surface measurements, which limits the application of TROPOspheric monitoring instrument (TROPOMI) products in emissions research. Radiometric calibration, a priori profiles, and fitting windows might cause the overestimation of S-5P operational SO2 product. Here, we improve the optimal-estimation-based algorithm through several calibration methods. The improved retrieval agrees reasonably well with the ground-based measurements (R > 0.70, bias <13.7%) and has smaller biases (-28.9%) with surface measurements over China and India. It revealed that the SO2 column in March 2020 decreased by 51.6% compared to March 2019 due to the lockdown for curbing the spread of the COVID-19 pandemic, and there was a decrease of 50% during the lockdown than those after the lockdown, similar to the surface measurement trend, while S-5P operational SO2 product showed an unrealistic increase of 19%. In India, the improved retrieval identified obvious "hot spots" and observed a 30% decrease of SO2 columns during the lockdown.
资助项目	National Key Research and Development Program of China[2018YFC0213104] ; National Key Research and Development Program of China[2017YFC0210002] ; National Key Research and Development Program of China[2016YFC0203302] ; National Key Research and Development Program of China[2017YFC0212800] ; National Natural Science Foundation of China[41722501] ; National Natural Science Foundation of China[91544212] ; National Natural Science Foundation of China[51778596] ; National Natural Science Foundation of China[41575021] ; National Natural Science Foundation of China[41977184] ; National Natural Science Foundation of China[41875043] ; Anhui Science and Technology Major Project[18030801111] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23020301] ; National Key Project for Causes and Control of Heavy Air Pollution[DQGG0102] ; National Key Project for Causes and Control of Heavy Air Pollution[DQGG0205] ; National High-Resolution Earth Observation Project of China[05-Y30B01-9001-19/203] ; Civil Aerospace Technology Advance Research Project[Y7K00100KJ]
WOS关键词	MAX-DOAS OBSERVATIONS ; EMISSION INVENTORY ; TROPOSPHERIC NO2 ; AIR-QUALITY ; SENTINEL-5 PRECURSOR ; OZONE ; INSTRUMENT ; OMI ; TROPOMI ; MODEL
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000695530700011
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Anhui Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key Project for Causes and Control of Heavy Air Pollution ; National High-Resolution Earth Observation Project of China ; Civil Aerospace Technology Advance Research Project
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125325]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Cheng; Cai, Zhaonan
作者单位	1.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Bur Frontier Sci & Educ, Beijing 100864, Peoples R China 4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 5.Univ Sci & Technol China, Sch Engn Sci, Hefei 230026, Peoples R China 6.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China 7.Chinese Acad Sci, Inst Atmospher Phys IAP, Key Lab Middle Atmosphere & Global Environm Obser, Beijing 100029, Peoples R China 8.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 9.Univ Sci & Technol China, Key Lab Precis Sci Instrumentat Anhui Higher Educ, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Xia, Congzi,Liu, Cheng,Cai, Zhaonan,et al. Improved Anthropogenic SO2 Retrieval from High-Spatial-Resolution Satellite and its Application during the COVID-19 Pandemic[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55.
APA	Xia, Congzi.,Liu, Cheng.,Cai, Zhaonan.,Duan, Xiaonan.,Hu, Qihou.,...&Liu, Yi.(2021).Improved Anthropogenic SO2 Retrieval from High-Spatial-Resolution Satellite and its Application during the COVID-19 Pandemic.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55.
MLA	Xia, Congzi,et al."Improved Anthropogenic SO2 Retrieval from High-Spatial-Resolution Satellite and its Application during the COVID-19 Pandemic".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55(2021).