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Article Dans Une Revue Science Année : 2023

Record-high CO 2 emissions from boreal fires in 2021

Bo Zheng
Hui Yang
Josep Canadell
Yang Chen
Ivar van der Velde
Ilse Aben
Emilio Chuvieco
Steven Davis
Merritt Deeter
Chaopeng Hong
  • Fonction : Auteur
Yawen Kong
Haiyan Li
Hui Li
  • Fonction : Auteur
Xin Lin
Kebin He
Qiang Zhang

Résumé

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.
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Dates et versions

hal-04042405 , version 1 (23-03-2023)

Identifiants

Citer

Bo Zheng, Philippe Ciais, Frederic Chevallier, Hui Yang, Josep Canadell, et al.. Record-high CO 2 emissions from boreal fires in 2021. Science, 2023, 379 (6635), pp.912-917. ⟨10.1126/science.ade0805⟩. ⟨hal-04042405⟩
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