Fig. 3: Model results.
From: Permo–Triassic boundary carbon and mercury cycling linked to terrestrial ecosystem collapse
a–d Volcanic C and Hg source only (thermogenic plus magmatic). e–h With addition of ‘vegetation loss′ Hg source and corresponding increase in organic carbon oxidation. C-isotope, Hg/TOC and δ202Hg data from ‘Meishan GSSP' section20,23. In both columns, top panel (a, e) shows input forcing in terms of relative rate of Hg input, next panel (b, f) shows δ13C of new shallow ocean carbonate, third panel (c, g) shows Hg/TOC data versus the model molar Hg/Corg burial rate, which has been scaled to match the background as the model does not calculate weights. Final panel (d, h) shows model δ202Hg against data, where solid line is shallow water (box s) and dashed line is deep water (box d) Blue dots = published data; Red and green lines = model Hg fluxes; Pink lines = model output.
