气候变化领域集成服务门户(CCPortal): Air quality impacts of COVID-19 lockdown measures detected from space using high spatial resolution observations of multiple trace gases from Sentinel-5P/TROPOMI

CCPortal

DOI	10.5194/acp-22-10319-2022
	Air quality impacts of COVID-19 lockdown measures detected from space using high spatial resolution observations of multiple trace gases from Sentinel-5P/TROPOMI
	Levelt, Pieternel F.; Zweers, Deborah C. Stein; Aben, Ilse; Bauwens, Maite; Borsdorff, Tobias; De Smedt, Isabelle; Eskes, Henk J.; Lerot, Christophe; Loyola, Diego G.; Romahn, Fabian; Stavrakou, Trissevgeni; Theys, Nicolas; Van Roozendael, Michel; Veefkind, J. Pepijn; Verhoelst, Tijl
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	10319
结束页码	10351
卷号	22 期号:15 页码:33
英文摘要	The aim of this paper is to highlight how TROPOspheric Monitoring Instrument (TROPOMI) trace gas data can best be used and interpreted to understand event-based impacts on air quality from regional to city scales around the globe. For this study, we present the observed changes in the atmospheric column amounts of five trace gases (NO2, SO2, CO, HCHO, and CHOCHO) detected by the Sentinel-5P TROPOMI instrument and driven by reductions in anthropogenic emissions due to COVID-19 lockdown measures in 2020. We report clear COVID-19-related decreases in TROPOMI NO2 column amounts on all continents. For megacities, reductions in column amounts of tropospheric NO2 range between 14 % and 63 %. For China and India, supported by NO2 observations, where the primary source of anthropogenic SO2 is coal-fired power generation, we were able to detect sector-specific emission changes using the SO2 data. For HCHO and CHOCHO, we consistently observe anthropogenic changes in 2-week-averaged column amounts over China and India during the early phases of the lockdown periods. That these variations over such a short timescale are detectable from space is due to the high resolution and improved sensitivity of the TROPOMI instrument. For CO, we observe a small reduction over China, which is in concert with the other trace gas reductions observed during lockdown; however, large interannual differences prevent firm conclusions from being drawn. The joint analysis of COVID-19-lockdown-driven reductions in satellite-observed trace gas column amounts using the latest operational and scientific retrieval techniques for five species concomitantly is unprecedented. However, the meteorologically and seasonally driven variability of the five trace gases does not allow for drawing fully quantitative conclusions on the reduction in anthropogenic emissions based on TROPOMI observations alone. We anticipate that in future the combined use of inverse modeling techniques with the high spatial resolution data from S5P/TROPOMI for all observed trace gases presented here will yield a significantly improved sector-specific, space-based analysis of the impact of COVID-19 lockdown measures as compared to other existing satellite observations. Such analyses will further enhance the scientific impact and societal relevance of the TROPOMI mission.
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:000839612300001
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/273610
作者单位	Royal Netherlands Meteorological Institute; Helmholtz Association; German Aerospace Centre (DLR)
推荐引用方式 GB/T 7714	Levelt, Pieternel F.,Zweers, Deborah C. Stein,Aben, Ilse,et al. Air quality impacts of COVID-19 lockdown measures detected from space using high spatial resolution observations of multiple trace gases from Sentinel-5P/TROPOMI[J],2022,22(15):33.
APA	Levelt, Pieternel F..,Zweers, Deborah C. Stein.,Aben, Ilse.,Bauwens, Maite.,Borsdorff, Tobias.,...&Verhoelst, Tijl.(2022).Air quality impacts of COVID-19 lockdown measures detected from space using high spatial resolution observations of multiple trace gases from Sentinel-5P/TROPOMI.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(15),33.
MLA	Levelt, Pieternel F.,et al."Air quality impacts of COVID-19 lockdown measures detected from space using high spatial resolution observations of multiple trace gases from Sentinel-5P/TROPOMI".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.15(2022):33.