Biogeosciences
Biogeosciences
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Articles | Volume 20, issue 18
Articles | Volume 20, issue 18
https://doi.org/10.5194/bg-20-3981-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-3981-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 18
Research article
 | 
28 Sep 2023
Research article |  | 28 Sep 2023

The response of wildfire regimes to Last Glacial Maximum carbon dioxide and climate

Olivia Haas, Iain Colin Prentice, and Sandy P. Harrison

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Short summary
We quantify the impact of CO2 and climate on global patterns of burnt area, fire size, and intensity under Last Glacial Maximum (LGM) conditions using three climate scenarios. Climate change alone did not produce the observed LGM reduction in burnt area, but low CO2 did through reducing vegetation productivity. Fire intensity was sensitive to CO2 but strongly affected by changes in atmospheric dryness. Low CO2 caused smaller fires; climate had the opposite effect except in the driest scenario.
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