Early spring near-surface ozone in Europe during the COVID-19 shutdown: Meteorological effects outweigh emission changes

doi:10.1016/j.scitotenv.2020.141322

	Early spring near-surface ozone in Europe during the COVID-19 shutdown: Meteorological effects outweigh emission changes
	Ordonez, Carlos 1; Garrido-Perez, Jose M.1,2; Garcia-Herrera, Ricardo 1,2
	2020-12
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
摘要	This paper analyses the impact of the control measures during the COVID-19 lockdown in Europe (15 March-30 April 2020) on 1-h daily maximum nitrogen dioxide (NO2) and maximum daily 8-h running average ozone (MDA8 O-3) observations obtained from the European Environment Agency's air quality database (AirBase). Daily maximum NO2 decreased consistently over the whole continent, with relative reductions ranging from 5% to 55% with respect to the same period in 2015-2019 for 80% of the sites considered (10th - 90th percentiles). However, MDA8 O-3 concentrations showed a different pattern, decreasing over Iberia and increasing elsewhere. In particular, a large region fromnorthwestern to central Europe experienced increases of 10-22% at urban background stations, reaching typical values of the summer season. The analysis of the expected NO2 and O-3 concentrations in the absence of the lockdown, using generalised additive models fed by reanalysismeteorological data, shows that the low NO2 concentrations were mostly attributed to the emission reductions while O-3 anomalies were dominated by the meteorology. The relevance of each meteorological variable depends on the location. The positive O-3 anomalies in northwestern and central Europe were mostly associated with elevated temperatures, low specific humidity and enhanced solar radiation. This pattern could be an analogue to study the limits of pollution control policies under climate change scenarios. On the other hand, the O-3 reduction in Iberia is mostly attributable to the low solar radiation and high specific humidity, although the reduced zonal wind also played a role in the proximity of the Iberian Mediterranean coast. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Air quality Air pollution Ozone COVID-19 Coronavirus NO2
DOI	10.1016/j.scitotenv.2020.141322
WOS关键词	TROPOSPHERIC OZONE ; AIR-POLLUTION ; AMBIENT AIR ; TRENDS ; URBAN ; DECOMPOSITION ; SWITZERLAND ; EXTREMES ; DECREASE ; INCREASE
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
出版者	ELSEVIER
引用统计
文献类型	期刊论文
专题	新冠肺炎循证社会科学证据集成
作者单位	1.Univ Complutense Madrid; 2.CSIC UCM
推荐引用方式 GB/T 7714	Ordonez, Carlos,Garrido-Perez, Jose M.,Garcia-Herrera, Ricardo. Early spring near-surface ozone in Europe during the COVID-19 shutdown: Meteorological effects outweigh emission changes[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020.
APA	Ordonez, Carlos,Garrido-Perez, Jose M.,&Garcia-Herrera, Ricardo.(2020).Early spring near-surface ozone in Europe during the COVID-19 shutdown: Meteorological effects outweigh emission changes.SCIENCE OF THE TOTAL ENVIRONMENT.
MLA	Ordonez, Carlos,et al."Early spring near-surface ozone in Europe during the COVID-19 shutdown: Meteorological effects outweigh emission changes".SCIENCE OF THE TOTAL ENVIRONMENT (2020).