Special Issue on COVID-19 Aerosol Drivers, Impacts and Mitigation

Mikalai Filonchyk This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Volha Hurynovich1,2, Haowen Yan This email address is being protected from spambots. You need JavaScript enabled to view it.1,2

1 Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China
2 Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China


Received: July 31, 2020
Revised: March 18, 2021
Accepted: March 22, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.200472  


Cite this article:

Filonchyk, M., Hurynovich, V., Yan, H. (2021). Impact of COVID-19 Pandemic on Air Pollution in Poland Based on Surface Measurements and Satellite Data. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.200472


HIGHLIGHTS

  • The effects of COVID-19 lockdown on air quality in Poland.
  • Positive impacts of COVID-19 on air quality.
  • TROPOMI and MODIS data were used to quantify lockdown impact.
  • Reductions of PM2.5, PM10 and NO2 approximately by –5.1 to 35.5%, –8.3 to 33.1% and –0.4 to 18.8%.
 

ABSTRACT


Since its first detection in December 2019 in the Chinese city of Wuhan, the virus has become a global pandemic within just three months. The Polish government declared a state of emergency on March 14, 2020, which was connected with the adoption of a number of measures aimed to prevent the spread of the virus. These restrictive measures have led to improvements in air quality throughout the country. Therefore, evaluation of the reduction in anthropogenic emissions due to COVID-19 and related government measures to constrain its spread is crucial to define its impact on air pollution. During this study, aerosol optical depth (AOD) observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) were used along with tropospheric NO2 and SO2 vertical column densities from TROPOspheric Monitoring Instrument (TROPOMI). The data on ground-based concentrations of pollutants (PM2.5, PM10, NO2 and SO2) obtained from air quality monitoring stations were also considered to assess changes in aerosols and air pollutants connected with the cessation of various kinds of anthropogenic and industrial activities due to preventive measures for COVID-19. In large cities of the country, the concentrations of PM2.5, PM10 and NO2 were reduced in the range from -5.1% to -35.5%, from -8.3% to -33.1% and from -0.4% to -18.8%. In addition, satellite data for NO2 and SO2 also indicate a decrease in concentration across the country by -10.8% and -25.6% during the COVID-19 restrictions period. The lockdown events may play a vital role as a potential solution to reduce air pollution in future as it may not be uncommon for governments to introduce deliberately selective hotspot lockdowns to control pollution levels.


Keywords: COVID-19, Pandemic, Poland, TROPOMI, MODIS




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