Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 22, issue 6
Articles | Volume 22, issue 6
https://doi.org/10.5194/acp-22-4201-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-4201-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 6
Research article
 | 
31 Mar 2022
Research article |  | 31 Mar 2022

Quantifying urban, industrial, and background changes in NO2 during the COVID-19 lockdown period based on TROPOMI satellite observations

Vitali Fioletov, Chris A. McLinden, Debora Griffin, Nickolay Krotkov, Fei Liu, and Henk Eskes

Supplement

https://doi.org/10.5194/acp-22-4201-2022-supplement

Data sets

The Gridded Population of the World (GPW) SEDAC https://sedac.ciesin.columbia.edu/data/collection/gpw-v4

ERA5: Fifth generation of ECMWF atmospheric reanalyses of the global climate C3S https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era5

2-Minute Gridded Global Relief Data (ETOPO2v2) NOAA https://www.ngdc.noaa.gov/mgg/global/etopo2.html

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Short summary
The COVID-19 lockdown had a large impact on anthropogenic emissions and particularly on nitrogen dioxide (NO2). A new method of isolation of background, urban, and industrial components in NO2 is applied to estimate the lockdown impact on each of them. From 16 March to 15 June 2020, urban NO2 declined by −18 % to −28 % in most regions of the world, while background NO2 typically declined by less than −10 %.
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