한빛사 논문
Jin-Soo Kim1,2, Jong-Seong Kug3,*, Su-Jong Jeong4,5, Hotaek Park6 and Gabriela Schaepman-Strub7
1 School of GeoSciences, University of Edinburgh, Edinburgh, UK.
2 National Centre for Earth Observation, University of Edinburgh, Edinburgh, UK.
3 Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, South Korea.
4 Department of Environmental Planning, Graduate School of Environmental Studies, Seoul National University, Seoul, South Korea.
5 Institute for Sustainable Development (ISD), Seoul National University, Seoul, South Korea.
6 Institute of Arctic Climate and Environmental Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan.
7 Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.
*Corresponding author : Jong-Seong Kug
Abstract
Carbon release through boreal fires could considerably accelerate Arctic warming; however, boreal fire occurrence mechanisms and dynamics remain largely unknown. Here, we analyze fire activity and relevant large-scale atmospheric conditions over southeastern Siberia, which has the largest burned area fraction in the circumboreal and high-level carbon emissions due to high-density peatlands. It is found that the annual burned area increased when a positive Arctic Oscillation (AO) takes place in early months of the year, despite peak fire season occurring 1 to 2 months later. A local high-pressure system linked to the AO drives a high-temperature anomaly in late winter, causing premature snowmelt. This causes earlier ground surface exposure and drier ground in spring due to enhanced evaporation, promoting fire spreading. Recently, southeastern Siberia has experienced warming and snow retreat; therefore, southeastern Siberia requires appropriate fire management strategies to prevent massive carbon release and accelerated global warming.
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