气候变化领域集成服务门户(CCPortal): Sudden changes in nitrogen dioxide emissions over Greece due to lockdown after the outbreak of COVID-19

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DOI	10.5194/acp-21-1759-2021
	Sudden changes in nitrogen dioxide emissions over Greece due to lockdown after the outbreak of COVID-19
	Koukouli M.-E.; Skoulidou I.; Karavias A.; Parcharidis I.; Balis D.; Manders A.; Segers A.; Eskes H.; Van Geffen J.
发表日期	2021
ISSN	1680-7316
起始页码	1759
结束页码	1774
卷号	21 期号:3
英文摘要	The unprecedented order, in modern peaceful times, for a near-total lockdown of the Greek population as a means of protection against severe acute respiratory syndrome coronavirus 2, commonly known as COVID-19, has generated unintentional positive side-effects with respect to the country s air quality levels. Sentinel-5 Precursor/ Tropospheric Monitoring Instrument (S5P/TROPOMI) monthly mean tropospheric nitrogen dioxide (NO2) observations show an average change of34%toC20%and39% to 5% with an average decrease of 15% and 11% for March and April 2020 respectively, compared with the previous year, over the six larger Greek metropolitan areas; this is mostly attributable to vehicular emission reductions. For the capital city of Athens, weekly analysis was statistically possible for the S5P/TROPOMI observations and revealed a marked decline in the NO2 load of between 8%and 43% for 7 of the 8 weeks studied; this is in agreement with the equivalent Ozone Monitoring Instrument (OMI)/Aura observations as well as the ground-based estimates of a multi-axis differential optical absorption spectroscopy ground-based instrument. Chemical transport modelling of the NO2 columns, provided by the Long Term Ozone Simulation European Operational Smog (LOTOS-EUROS) chemical transport model, shows that the magnitude of these reductions cannot solely be attributed to the difference in meteorological factors affecting NO2 levels during March and April 2020 and the equivalent time periods of the previous year. Taking this factor into account, the resulting decline was estimated to range between 25% and 65% for 5 of the 8 weeks studied, with the remaining 3 weeks showing a positive average of 10 %; this positive average was postulated to be due to the uncertainty of the methodology, which is based on differences. As a result this analysis, we conclude that the effect of the COVID-19 lockdown and the restriction of transport emissions over Greece is 10 %. As transport is the second largest sector (after industry) affecting Greece s air quality, this occasion may well help policymakers to enforce more targeted measures to aid Greece in further reducing emissions according to international air quality standards. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
英文关键词	SARS coronavirus
语种	英语
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/168776
作者单位	Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece; Department of Geography, Harokopio University, Athens, Greece; Tno Climate, Air and Sustainability, Utrecht, Netherlands; Royal Netherlands Meteorological Institute (KNMI), De Bilt, Netherlands
推荐引用方式 GB/T 7714	Koukouli M.-E.,Skoulidou I.,Karavias A.,et al. Sudden changes in nitrogen dioxide emissions over Greece due to lockdown after the outbreak of COVID-19[J],2021,21(3).
APA	Koukouli M.-E..,Skoulidou I..,Karavias A..,Parcharidis I..,Balis D..,...&Van Geffen J..(2021).Sudden changes in nitrogen dioxide emissions over Greece due to lockdown after the outbreak of COVID-19.Atmospheric Chemistry and Physics,21(3).
MLA	Koukouli M.-E.,et al."Sudden changes in nitrogen dioxide emissions over Greece due to lockdown after the outbreak of COVID-19".Atmospheric Chemistry and Physics 21.3(2021).