Cargando…

Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic

In present study, the variation in concentration of key air pollutants such as PM(2.5), PM(10), NO(2), SO(2) and O(3) during the pre-lockdown and post-lockdown phase has been investigated. In addition, the monthly concentration of air pollutants in March, April and May of 2020 is also compared with...

Descripción completa

Detalles Bibliográficos
Autores principales: Kumari, Pratima, Toshniwal, Durga
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier B.V. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7562773/
https://www.ncbi.nlm.nih.gov/pubmed/33083215
http://dx.doi.org/10.1016/j.uclim.2020.100719
_version_ 1783595345269227520
author Kumari, Pratima
Toshniwal, Durga
author_facet Kumari, Pratima
Toshniwal, Durga
author_sort Kumari, Pratima
collection PubMed
description In present study, the variation in concentration of key air pollutants such as PM(2.5), PM(10), NO(2), SO(2) and O(3) during the pre-lockdown and post-lockdown phase has been investigated. In addition, the monthly concentration of air pollutants in March, April and May of 2020 is also compared with that of 2019 to unfold the effect of restricted emissions under similar meteorological conditions. To evaluate the global impact of COVID-19 on the air quality, ground-based data from 162 monitoring stations from 12 cities across the globe are analysed for the first time. The concentration of PM(2.5), PM(10) and NO(2) were reduced by 20–34%, 24–47% and 32–64%, respectively, due to restriction on anthropogenic emission sources during lockdown. However, a lower reduction in SO(2) was observed due to functional power plants. O(3) concentration was found to be increased due to the declined emission of NO. Nevertheless, the achieved improvements were temporary as the pollution level has gone up again in cities where lockdown was lifted. The study might assist the environmentalist, government and policymakers to curb down the air pollution in future by implementing the strategic lockdowns at the pollution hotspots with minimal economic loss.
format Online
Article
Text
id pubmed-7562773
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Elsevier B.V.
record_format MEDLINE/PubMed
spelling pubmed-75627732020-10-16 Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic Kumari, Pratima Toshniwal, Durga Urban Clim Article In present study, the variation in concentration of key air pollutants such as PM(2.5), PM(10), NO(2), SO(2) and O(3) during the pre-lockdown and post-lockdown phase has been investigated. In addition, the monthly concentration of air pollutants in March, April and May of 2020 is also compared with that of 2019 to unfold the effect of restricted emissions under similar meteorological conditions. To evaluate the global impact of COVID-19 on the air quality, ground-based data from 162 monitoring stations from 12 cities across the globe are analysed for the first time. The concentration of PM(2.5), PM(10) and NO(2) were reduced by 20–34%, 24–47% and 32–64%, respectively, due to restriction on anthropogenic emission sources during lockdown. However, a lower reduction in SO(2) was observed due to functional power plants. O(3) concentration was found to be increased due to the declined emission of NO. Nevertheless, the achieved improvements were temporary as the pollution level has gone up again in cities where lockdown was lifted. The study might assist the environmentalist, government and policymakers to curb down the air pollution in future by implementing the strategic lockdowns at the pollution hotspots with minimal economic loss. Elsevier B.V. 2020-12 2020-10-16 /pmc/articles/PMC7562773/ /pubmed/33083215 http://dx.doi.org/10.1016/j.uclim.2020.100719 Text en © 2020 Elsevier B.V. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Kumari, Pratima
Toshniwal, Durga
Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic
title Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic
title_full Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic
title_fullStr Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic
title_full_unstemmed Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic
title_short Impact of lockdown on air quality over major cities across the globe during COVID-19 pandemic
title_sort impact of lockdown on air quality over major cities across the globe during covid-19 pandemic
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7562773/
https://www.ncbi.nlm.nih.gov/pubmed/33083215
http://dx.doi.org/10.1016/j.uclim.2020.100719
work_keys_str_mv AT kumaripratima impactoflockdownonairqualityovermajorcitiesacrosstheglobeduringcovid19pandemic
AT toshniwaldurga impactoflockdownonairqualityovermajorcitiesacrosstheglobeduringcovid19pandemic