Six-fold increase of atmospheric pCO2 during the Permian–Triassic mass extinction

The Permian–Triassic mass extinction was marked by a massive release of carbon into the ocean-atmosphere system, evidenced by a sharp negative carbon isotope excursion. Large carbon emissions would have increased atmospheric p CO 2 and caused global warming. However, the magnitude of p CO 2 changes during the PTME has not yet been estimated. Here, we present a continuous p CO 2 record across the PTME reconstructed from high-resolution δ 13 C of...