Record-high CO2 emissions from boreal fires in 2021

• 成果类型: Article
• 署名作者: Zheng, Bo; Ciais, Philippe; Chevallier, Frederic; Yang, Hui; Canadell, Josep G.; Chen, Yang; van der Velde, Ivar R.; Aben, Ilse; Chuvieco, Emilio; Davis, Steven J.; Deeter, Merritt; Hong, Chaopeng; Kong, Yawen; Li, Haiyan; Li, Hui; Lin, Xin; He, Kebin; Zhang, Qiang
• 署名单位: Tsinghua Shenzhen International Graduate School; Tsinghua University; Universite Paris Saclay; CEA; Max Planck Society; Commonwealth Scientific & Industrial Research Organisation (CSIRO); CSIRO Environment; University of California System; University of California Irvine; Vrije Universiteit Amsterdam; Vrije Universiteit Amsterdam; Universidad de Alcala; University of California System; University of California Irvine; National Center Atmospheric Research (NCAR) - USA; Tsinghua University; Harbin Institute of Technology; Tsinghua University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12123
• DOI: 10.1126/science.ade0805
• 发表日期: 2023-03-03
• 页码: 912-917
• 关键词: burned area; el-nino; expansion; decline; driven; TRENDS

摘要

Extreme wildfires are becoming more common and increasingly affecting Earth's climate. Wildfires in boreal forests have attracted much less attention than those in tropical forests, although boreal forests are one of the most extensive biomes on Earth and are experiencing the fastest warming. We used a satellite-based atmospheric inversion system to monitor fire emissions in boreal forests. Wildfires are rapidly expanding into boreal forests with emerging warmer and drier fire seasons. Boreal fires, typically accounting for 10% of global fire carbon dioxide emissions, contributed 23% (0.48 billion metric tons of carbon) in 2021, by far the highest fraction since 2000. 2021 was an abnormal year because North American and Eurasian boreal forests synchronously experienced their greatest water deficit. Increasing numbers of extreme boreal fires and stronger climate-fire feedbacks challenge climate mitigation efforts.