Special Issue on Air Pollution and its Impact in South and Southeast Asia

Rajesh Kumar Sahu  , Manoj Hari  , Bhishma Tyagi  This email address is being protected from spambots. You need JavaScript enabled to view it.

Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Odisha 769008, India

Received: February 17, 2022
Revised: May 4, 2022
Accepted: June 10, 2022

 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.220084  

Cite this article:

Sahu, R.K., Hari, M., Tyagi, B. (2022). Forest Fire Induced Air Pollution over Eastern India during March 2021. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.220084


  • MODIS derived AOD highlighted the regional pollution with one day lag.
  • Pollutants such as CO and O3 spatially harmonized with AOD trend but not NO2.
  • Employed OCO-2 and TROPOMI to track air quality induced by forest fire.
  • XCO2 in the study domain increased considerably to a maximum of 422 ppm.


Being a significant contributor to atmospheric CO2, forest fires are considered a threat to the terrestrial ecosystems that influence climate change. This study integrates in-situ and earth observation platforms to investigate an episodic forest fire event at the Similipal National Park and the adjacent areas in eastern India and its effect on the ambient atmosphere of the nearby areas in 2021 March. The analysis brings out a substantial rise in the Aerosol Optical Depth (AOD) during this period with apparent anomalies in carbon monoxide (CO) and ozone (O3). The pronounced increase in the surface concentration of PM2.5 was increased about 12 µg m–3. Furthermore, the AOD exhibited a spike of about 56.21% during the fire episode. The pollutants' intensity (except NO2) was directly proportional to the fire counts, translated across the northern part of the region. The study also employed an emission index to calculate the amount of CO2 emitted and was pressed against changes in atmospheric XCO2 concentrations retrieved from OCO-2 during the fire episode.

Keywords: Aerosol, Particulate matter, Pollution exposure, Satellite observation, Wildfire, TROPOMI, OCO-2

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