Fig. S4.
Sensitivity experiment for a volcanic- and weathering-induced sulfur cycle perturbation. (A) This scenario encompasses an influx of simultaneous isotopically depleted sulfur (δ34SSO4 = 3‰) and isotopically enriched oxygen flux (δ18O SO4 = 34‰) from a volcanic source after the EH. Shaded time interval stands for the perturbation. (B) The fraction of sulfide buried as pyrite is lowered 10 times for an interval of 20 ky after the EH, after that, the fraction of pyrite burial is increased 2 times for an equivalent time period. Shaded time interval stands for the perturbation. Continental weathering is maintained to 7 times the preextinction value from the P−Tr boundary until the end of the model run. Red dotted line stands for the scenario closely correlating with CAS isotope data.