Extended Data Fig. 6: Sensitivity tests for the PETM.
From: Coupled decline in ocean pH and carbonate saturation during the Palaeocene–Eocene Thermal Maximum
This figure displays the reconstructed changes during the PETM in sea surface temperature (ΔSST, a), atmospheric CO2 concentration (ΔpCO2, b), surface pH (ΔpH, c), seafloor weight % CaCO3 (ΔCaCO3, d), surface calcite saturation state (ΔΩcalcite, e), and surface aragonite saturation state (ΔΩaragonite, f) across five different scenarios. The ‘Σg’ indicates reconstructions using cGENIE modeled pH, salinity, and saturation for proxy forward models. ‘no CaCO3’ excludes CaCO3 data assimilation. ‘CaCO3’ represents reconstructions assimilating only CaCO3 data. ‘ΣfixECS’ refers to reconstructions using the originally climate sensitivity in terms of radiative forcing set at 4 W/m2. ‘Σgsp’ features reconstructions using the same model ensemble as the prior for both the pre-PETM and PETM intervals. Gray areas represent density plots for the prior, while orange areas represent density plots for the posterior. Dashed lines represent the medians and 50% quantiles from the corresponding experiments, with accompanying text denoting the medians.
