Articles | Volume 21, issue 3
Atmos. Chem. Phys., 21, 1759–1774, 2021
https://doi.org/10.5194/acp-21-1759-2021
Atmos. Chem. Phys., 21, 1759–1774, 2021
https://doi.org/10.5194/acp-21-1759-2021

Research article 09 Feb 2021

Research article | 09 Feb 2021

Sudden changes in nitrogen dioxide emissions over Greece due to lockdown after the outbreak of COVID-19

Maria-Elissavet Koukouli et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish as is (31 Dec 2020) by Stelios Kazadzis
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Short summary
In recent years, satellite observations have contributed to monitoring air quality. During the first COVID-19 lockdown, lower levels of nitrogen dioxide were observed over Greece by S5P/TROPOMI for March and April 2020 (than the preceding year) due to decreased transport emissions. Taking meteorology into account, using LOTOS-EUROS CTM simulations, the resulting decline due to the lockdown was estimated to range between 0 % and −37 % for the five largest Greek cities, with an average of ~ −10 %.
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