Carbon emissions from the 2023 Canadian wildfires

The 2023 Canadian forest fires have been extreme in scale and intensity with more than seven times the average annual area burned compared to the previous four decades 1 . Here, we quantify the carbon emissions from these fires from May to September 2023 on the basis of inverse modelling of satellit...

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Vydáno v:	Nature (London) Ročník 633; číslo 8031; s. 835 - 839
Hlavní autoři:	Byrne, Brendan, Liu, Junjie, Bowman, Kevin W., Pascolini-Campbell, Madeleine, Chatterjee, Abhishek, Pandey, Sudhanshu, Miyazaki, Kazuyuki, van der Werf, Guido R., Wunch, Debra, Wennberg, Paul O., Roehl, Coleen M., Sinha, Saptarshi
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	London Nature Publishing Group UK 26.09.2024 Nature Publishing Group
Témata:	704/106/47/4113 704/47/4113 Canada Carbon - analysis Carbon dioxide Carbon emissions Carbon monoxide Carbon Monoxide - analysis Carbon Sequestration Carbon uptake Climate Climate change Climate change mitigation Emissions Estimates Forest & brush fires Forest fires Forests Fossil fuels History, 21st Century Humanities and Social Sciences multidisciplinary Precipitation Satellite observation Science Science (multidisciplinary) Temperature Wildfires Wildfires - statistics & numerical data Canada Quebec Canada India
ISSN:	0028-0836, 1476-4687, 1476-4687
On-line přístup:	Získat plný text
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Shrnutí:	The 2023 Canadian forest fires have been extreme in scale and intensity with more than seven times the average annual area burned compared to the previous four decades 1 . Here, we quantify the carbon emissions from these fires from May to September 2023 on the basis of inverse modelling of satellite carbon monoxide observations. We find that the magnitude of the carbon emissions is 647 TgC (570–727 TgC), comparable to the annual fossil fuel emissions of large nations, with only India, China and the USA releasing more carbon per year 2 . We find that widespread hot–dry weather was a principal driver of fire spread, with 2023 being the warmest and driest year since at least 1980 3 . Although temperatures were extreme relative to the historical record, climate projections indicate that these temperatures are likely to be typical during the 2050s, even under a moderate climate mitigation scenario (shared socioeconomic pathway, SSP 2–4.5) 4 . Such conditions are likely to drive increased fire activity and suppress carbon uptake by Canadian forests, adding to concerns about the long-term durability of these forests as a carbon sink 5 – 8 . Satellite carbon monoxide observations show that carbon emissions from the 2023 Canadian forest fires are comparable to the annual fossil fuel emissions of large nations.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	0028-0836 1476-4687 1476-4687
DOI:	10.1038/s41586-024-07878-z