Lockdown for CoViD-2019 in Milan: What are the effects on air quality?

Based on the rapid spread of the CoViD-2019, a lockdown was declared in the whole Northern Italy by the Government. The application of increasingly rigorous containment measures allowed to reduce the impact of the CoViD-2019 pandemic on the Italian National Health System but at the same time these r...

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Veröffentlicht in:The Science of the total environment Jg. 732; S. 139280
Hauptverfasser: Collivignarelli, Maria Cristina, Abbà, Alessandro, Bertanza, Giorgio, Pedrazzani, Roberta, Ricciardi, Paola, Carnevale Miino, Marco
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Netherlands Elsevier B.V 25.08.2020
Schlagworte:
air
Air monitoring
Air Pollutants
Air Pollution
air quality
benzene
Betacoronavirus
Cities
Coronavirus
Coronavirus Infections
CoViD
COVID-19
COVID-19 infection
environment
Environmental Monitoring
Humans
Italy
Ozone
pandemic
Pandemics
Particulate Matter
people
PM10
Pneumonia, Viral
SARS-CoV 2
traffic
Italy
Cities
PM10
Ozone
Air monitoring
Coronavirus
SARS-CoV 2
CoViD
PM
ISSN:0048-9697, 1879-1026, 1879-1026
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Zusammenfassung:Based on the rapid spread of the CoViD-2019, a lockdown was declared in the whole Northern Italy by the Government. The application of increasingly rigorous containment measures allowed to reduce the impact of the CoViD-2019 pandemic on the Italian National Health System but at the same time these restriction measures gave also the opportunity to assess the effect of anthropogenic activities on air pollutants in an unprecedented way. This paper aims to study the impact of the partial and total lockdown (PL and TL, respectively) on air quality in the Metropolitan City of Milan. As results, the severe limitation of people movements following the PL and the subsequent TL determined a significant reduction of pollutants concentration mainly due to vehicular traffic (PM10, PM2.5, BC, benzene, CO, and NOx). The lockdown led to an appreciable drop in SO2 only in the city of Milan while it remained unchanged in the adjacent areas. Despite the significant decrease in NO2 in the TL, the O3 exhibited a significant increase, probably, due to the minor NO concentration. In Milan and SaA the increase was more accentuated, probably, due to the higher average concentrations of benzene in Milan than the adjacent areas that might have promoted the formation of O3 in a more significant way. [Display omitted] •The effect of lockdown on air quality in Milan was assessed.•The trends of 9 pollutants in meteorologically comparable periods were studied.•Lockdown determined a significant reduction of PM10, PM2.5, BC, benzene, CO and NOx.•SO2 remained unchanged in the more peripheral areas.•Part of the ozone increase was probably due to the lower NO measured during lockdown.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2020.139280