气候变化领域集成服务门户(CCPortal): Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily seamless mapping and spatiotemporal variations

CCPortal

DOI	10.5194/acp-23-1511-2023
	Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily seamless mapping and spatiotemporal variations
	Wei, Jing; Li, Zhanqing; Wang, Jun; Li, Can; Gupta, Pawan; Cribb, Maureen
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	1511
结束页码	1532
卷号	23 期号:2 页码:22
英文摘要	Gaseous pollutants at the ground level seriously threaten the urban air quality environment and public health. There are few estimates of gaseous pollutants that are spatially and temporally resolved and continuous across China. This study takes advantage of big data and artificial-intelligence technologies to generate seamless daily maps of three major ambient pollutant gases, i.e., NO2, SO2, and CO, across China from 2013 to 2020 at a uniform spatial resolution of 10 km. Cross-validation between our estimates and ground observations illustrated a high data quality on a daily basis for surface NO2, SO2, and CO concentrations, with mean coefficients of determination (root-mean-square errors) of 0.84 (7.99 mu g m(-3)), 0.84 (10.7 mu g m(-3)), and 0.80 (0.29 mg m(-3)), respectively. We found that the COVID-19 lockdown had sustained impacts on gaseous pollutants, where surface CO recovered to its normal level in China on around the 34th day after the Lunar New Year, while surface SO2 and NO2 rebounded more than 2 times slower due to more CO emissions from residents' increased indoor cooking and atmospheric oxidation capacity. Surface NO2, SO2, and CO reached their peak annual concentrations of 21.3 +/- 8.8 mu g m(-3), 23.1 +/- 13.3 mu g m(-3), and 1.01 +/- 0.29 mg m(-3) in 2013, then continuously declined over time by 12 %, 55 %, and 17 %, respectively, until 2020. The declining rates were more prominent from 2013 to 2017 due to the sharper reductions in anthropogenic emissions but have slowed down in recent years. Nevertheless, people still suffer from high-frequency risk exposure to surface NO2 in eastern China, while surface SO2 and CO have almost reached the World Health Organization (WHO) recommended short-term air quality guidelines (AQG) level since 2018, benefiting from the implemented stricter ultra-low emission standards. This reconstructed dataset of surface gaseous pollutants will benefit future (especially short-term) air pollution and environmental health-related studies.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000922817200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273802
作者单位	University System of Maryland; University of Maryland College Park; University of Iowa; Universities Space Research Association (USRA); National Aeronautics & Space Administration (NASA)
推荐引用方式 GB/T 7714	Wei, Jing,Li, Zhanqing,Wang, Jun,et al. Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily seamless mapping and spatiotemporal variations[J],2023,23(2):22.
APA	Wei, Jing,Li, Zhanqing,Wang, Jun,Li, Can,Gupta, Pawan,&Cribb, Maureen.(2023).Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily seamless mapping and spatiotemporal variations.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),22.
MLA	Wei, Jing,et al."Ground-level gaseous pollutants (NO2, SO2, and CO) in China: daily seamless mapping and spatiotemporal variations".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):22.