Wetter environment and increased grazing reduced the area burned in northern Eurasia: 2002–2016

• Main Authors: Hao, Wei Min, Reeves, Matthew C., Baggett, L. Scott, Balkanski, Yves, Ciais, Philippe, Nordgren, Bryce L., Petkov, Alexander, Corley, Rachel E., Mouillot, Florent, Urbanski, Shawn P., Yue, Chao
• Format: Text
• Language: English
• Published: 2020
• Subjects: Arctic; black carbon; Climate change
• Online Access: https://doi.org/10.5194/bg-2020-139; https://www.biogeosciences-discuss.net/bg-2020-139/

Northern Eurasia is highly sensitive to climate change. Fires in this region can have significant impacts on regional air quality, radiative forcing and black carbon deposition in the Arctic to accelerate ice melting. Using a MODIS-derived burned area data set, we report that the total annual area burned in this region declined by 53 % during the 15-year period of 2002–2016. Grassland fires dominated the trend, accounting for 93 % of the decline of the total area burned. Grassland fires in Kazakhstan contributed 47 % of the total area burned and 84 % of the decline. Wetter climate and increased grazing are the principle driving forces for the decline. Our findings: 1) highlight the importance of the complex interactions of climate-vegetation-land use in affecting fire activity, and 2) reveal how the resulting impacts on fire activity in a relatively small region such as Kazakhstan can dominate the trends of burned areas across a much larger landscape of northern Eurasia. Our findings may be used to improve the prediction of future fire dynamics and associated fire emissions in northern Eurasia.