The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil

doi:10.1016/j.scitotenv.2020.139085

	The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil
	Dantas, Guilherme 1; Siciliano, Bruno 1; da Silva, Cleyton M.1,3; Arbilla, Graciela 1; Franca, Bruno Boscaro 2
	2020-08
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
摘要	The first COVID-19 case in Brazilwas confirmed on February 25, 2020. OnMarch 16, the state's governor declared public health emergency in the city of Rio de Janeiro and partial lockdown measures came into force aweek later. Themain goal of thiswork is to discuss the impact of the measures on the air quality of the city by comparing the particulate matter, carbon monoxide, nitrogen dioxide and ozone concentrations determined during the partial lockdown with values obtained in the same period of 2019 and also with the weeks prior to the virus outbreak. Concentrations varied with substantial differences among pollutants and also among the three studied monitoring stations. CO levels showed themost significant reductions (30.3-48.5%) since theywere related to light-duty vehicular emissions. NO2 also showed reductions while PM10 levels were only reduced in the first lockdown week. In April, an increase in vehicular flux and movement of people was observed mainly as a consequence of the lack of consensus about the importance and need of social distancing and lockdown. Ozone concentrations increased probably due to the decrease in nitrogen oxides level. When comparing with the same period of 2019, NO2 and CO median values were 24.1-32.9 and 37.0-43.6% lower. Meteorological interferences, mainly the transport of pollutants from the industrial areas might have also impacted the results. (C) 2020 Elsevier B.V. All rights reserved.
关键词	COVID-19 Lockdown Nitrogen dioxide PM10 Carbon monoxide Ozone
DOI	10.1016/j.scitotenv.2020.139085
WOS关键词	VOLATILE ORGANIC-COMPOUNDS
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 Fed Rio de Janeiro; 2.Municipal Dept Environm SMAC; 3.Univ Veiga de Almeida
推荐引用方式 GB/T 7714	Dantas, Guilherme,Siciliano, Bruno,da Silva, Cleyton M.,et al. The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020.
APA	Dantas, Guilherme,Siciliano, Bruno,da Silva, Cleyton M.,Arbilla, Graciela,&Franca, Bruno Boscaro.(2020).The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil.SCIENCE OF THE TOTAL ENVIRONMENT.
MLA	Dantas, Guilherme,et al."The impact of COVID-19 partial lockdown on the air quality of the city of Rio de Janeiro, Brazil".SCIENCE OF THE TOTAL ENVIRONMENT (2020).