Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality

Abstract Air quality in urban areas and megacities is dependent on emissions, physicochemical process and atmospheric conditions in a complex manner. The impact on air quality metrics of the COVID-19 lockdown measures was evaluated during two periods in Athens, Greece. The first period involved stop...

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Autores principales:	Konstantinos Eleftheriadis, Maria I. Gini, Evangelia Diapouli, Stergios Vratolis, Vasiliki Vasilatou, Prodromos Fetfatzis, Manousos I. Manousakas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bafbf0ce3feb4ac980d7eb1bd8f4d7ab
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spelling	oai:doaj.org-article:bafbf0ce3feb4ac980d7eb1bd8f4d7ab2021-12-02T15:33:00ZAerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality10.1038/s41598-021-93650-62045-2322https://doaj.org/article/bafbf0ce3feb4ac980d7eb1bd8f4d7ab2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93650-6https://doaj.org/toc/2045-2322Abstract Air quality in urban areas and megacities is dependent on emissions, physicochemical process and atmospheric conditions in a complex manner. The impact on air quality metrics of the COVID-19 lockdown measures was evaluated during two periods in Athens, Greece. The first period involved stoppage of educational and recreational activities and the second severe restrictions to all but necessary transport and workplace activities. Fresh traffic emissions and their aerosol products in terms of ultrafine nuclei particles and nitrates showed the most significant reduction especially during the 2nd period (40–50%). Carbonaceous aerosol both from fossil fuel emissions and biomass burning, as well as aging ultrafine and accumulation mode particles showed an increase of 10–20% of average before showing a decline (5 to 30%). It is found that removal of small nuclei and Aitken modes increased growth rates and migration of condensable species to larger particles maintaining aerosol volume.Konstantinos EleftheriadisMaria I. GiniEvangelia DiapouliStergios VratolisVasiliki VasilatouProdromos FetfatzisManousos I. ManousakasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Konstantinos Eleftheriadis Maria I. Gini Evangelia Diapouli Stergios Vratolis Vasiliki Vasilatou Prodromos Fetfatzis Manousos I. Manousakas Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality
description	Abstract Air quality in urban areas and megacities is dependent on emissions, physicochemical process and atmospheric conditions in a complex manner. The impact on air quality metrics of the COVID-19 lockdown measures was evaluated during two periods in Athens, Greece. The first period involved stoppage of educational and recreational activities and the second severe restrictions to all but necessary transport and workplace activities. Fresh traffic emissions and their aerosol products in terms of ultrafine nuclei particles and nitrates showed the most significant reduction especially during the 2nd period (40–50%). Carbonaceous aerosol both from fossil fuel emissions and biomass burning, as well as aging ultrafine and accumulation mode particles showed an increase of 10–20% of average before showing a decline (5 to 30%). It is found that removal of small nuclei and Aitken modes increased growth rates and migration of condensable species to larger particles maintaining aerosol volume.
format	article
author	Konstantinos Eleftheriadis Maria I. Gini Evangelia Diapouli Stergios Vratolis Vasiliki Vasilatou Prodromos Fetfatzis Manousos I. Manousakas
author_facet	Konstantinos Eleftheriadis Maria I. Gini Evangelia Diapouli Stergios Vratolis Vasiliki Vasilatou Prodromos Fetfatzis Manousos I. Manousakas
author_sort	Konstantinos Eleftheriadis
title	Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality
title_short	Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality
title_full	Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality
title_fullStr	Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality
title_full_unstemmed	Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality
title_sort	aerosol microphysics and chemistry reveal the covid19 lockdown impact on urban air quality
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bafbf0ce3feb4ac980d7eb1bd8f4d7ab
work_keys_str_mv	AT konstantinoseleftheriadis aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality AT mariaigini aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality AT evangeliadiapouli aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality AT stergiosvratolis aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality AT vasilikivasilatou aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality AT prodromosfetfatzis aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality AT manousosimanousakas aerosolmicrophysicsandchemistryrevealthecovid19lockdownimpactonurbanairquality
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Aerosol microphysics and chemistry reveal the COVID19 lockdown impact on urban air quality

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