Flood basalts are connected to Earth’s most extreme environmental crises, yet warming is sometimes observed before surface eruptions. Modelling reveals that a complex buildup of basalt intrusions into the crust releases enough CO2 to cause this pre-eruptive warming.
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The author declares no competing interests.
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Kasbohm, J. Flood basalt buildup warms climate. Nat. Geosci. 15, 342–343 (2022). https://doi.org/10.1038/s41561-022-00944-z