Articles | Volume 21, issue 10
Atmos. Chem. Phys., 21, 7597–7609, 2021
Atmos. Chem. Phys., 21, 7597–7609, 2021

Research article 19 May 2021

Research article | 19 May 2021

Impacts of the COVID-19 lockdown on air pollution at regional and urban background sites in northern Italy

Jean-Philippe Putaud et al.

Data sets

Joint Research Centre Data Catalogue European Commission

ACTRIS Data Centre Norsk Institutt for Luftforskning (NILU)

Richiesta Dati ARPA Lombardia

CAMS European air quality forecasts Copernicus Atmosphere Monitoring Service (CAMS)!/dataset/cams-europe-air-quality-forecasts?tab=form

Short summary
To determine the impact of the COVID lockdown on air quality in northern Italy, measurements of atmospheric pollutants (NO2, PM10, O3, NO, SO2 ) were compared to the output of a model ignoring the lockdown. We found that NO2 decreased on average by −30 % to −40 %. Unlike NO2, PM10 was not significantly affected due to the compensation of decreased emissions from traffic by increased emissions from domestic heating and/or by changes in atmospheric chemistry enhancing secondary aerosol formation.
Final-revised paper