Abstract
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.
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