Extended Data Fig. 4: Sensitivity analysis to marine weathering fluxes.
From: Reverse weathering as a long-term stabilizer of marine pH and planetary climate
Steady-state results for \({p}_{{{\rm{CO}}}_{{\rm{2}}}}\) and pH over the estimated range of marine weathering CO2 consumption flux (Fmw) after ref. 27. a, Simulating modern Earth states. Acidity release through reverse weathering is fixed at 1 Tmol yr−1. b, Simulating Precambrian Earth states with elevated reverse-weathering buffer at dissolved silica of 1.33 mM. Contours highlight the variation of volcanic outgassing rates in teramoles per year. Shaded areas indicate parameter space that is unattainable for a steady-state system (marine weathering exceeds the sum of CO2 fluxes from degassing and extent of reverse weathering).
