Extended Data Fig. 3: The effect of different atmospheric δ13CCO2 values on forest fire area estimates. | Nature Geoscience

Extended Data Fig. 3: The effect of different atmospheric δ13CCO2 values on forest fire area estimates.

From: Marine organic carbon burial increased forest fire frequency during Oceanic Anoxic Event 2

Extended Data Fig. 3

Axes and blue shading same as in Fig. 3 main text. Line types indicate different δ13CCO2 values (solid = 2‰, dashed = 4‰) used to test sensitivity of carbon mass balance equation to starting CO2 carbon isotopic composition. Minimum estimate (900 ppm CO2, δ13CCO2 = 4‰, total forest size of 1000 Gt C) is 28%, maximum estimate (1100 ppm CO2, δ13CCO2 = 2‰, total forest size of 900 Gt C) is 41%.

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