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

Koukouli, Maria-Elissavet; Skoulidou, Ioanna; Karavias, Andreas; Parcharidis, Isaak; Balis, Dimitris; Manders, Astrid; Segers, Arjo; Eskes, Henk; van Geffen, Jos

doi:https://doi.org/10.5194/acp-21-1759-2021

Articles | Volume 21, issue 3

https://doi.org/10.5194/acp-21-1759-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-1759-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 3

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, Ioanna Skoulidou, Andreas Karavias, Isaak Parcharidis, Dimitris Balis, Astrid Manders, Arjo Segers, Henk Eskes, and Jos van Geffen

Supplement

https://doi.org/10.5194/acp-21-1759-2021-supplement

Data sets

Air quality measurements from in situ monitoring stations European Environment Agency (EEA) https://discomap.eea.europa.eu/map/fme/AirQualityExport.htm

Air quality measurements from in situ monitoring stations Greek Ministry of the Environment https://ypen.gov.gr/perivallon/poiotita-tis-atmosfairas/dedomena-metriseon-atmosfairikis-rypansis/

Sentinel-5P MPC Validation Server, NO2 tropospheric column OFFL vs MAXDOAS MPC ESA https://mpc-vdaf-server.tropomi.eu/no2/no2-offl-maxdoas/athens

EarthData Giovanni repository NASA https://giovanni.gsfc.nasa.gov/giovanni/

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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 %.