Biogeochemical controls on photic-zone euxinia during the end-Permian mass extinction

  title={Biogeochemical controls on photic-zone euxinia during the end-Permian mass extinction},
  author={Katja M. Meyer and Lee R. Kump and Andy Ridgwell},
Geochemical, biomarker, and isotopic evidence suggests that the end-Permian was characterized by extreme oceanic anoxia that may have led to hydrogen sulfide buildup and mass extinction. We use an earth system model to quantify the biogeochemical and physical conditions necessary for widespread oceanic euxinia and hydrogen sulfide release to the atmosphere. Greater than threefold increases in ocean nutrient content combined with nutrient-trapping ocean circulation cause surface-water H 2 S… 

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Flourishing ocean drives the end-Permian marine mass extinction

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Simulating Permian–Triassic oceanic anoxia distribution: Implications for species extinction and recovery

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Permo–Triassic boundary carbon and mercury cycling linked to terrestrial ecosystem collapse

A new biogeochemical model is built that couples the global Hg and C cycles to evaluate the distinct terrestrial contribution to atmosphere–ocean biogeochemistry separated from coeval volcanic fluxes, and shows that a massive collapse of terrestrial ecosystems linked to volcanism-driven environmental change triggered significantBiogeochemical changes, and cascaded organic matter, nutrients, HG and other organically-bound species into the marine system.

6.12 – The Geochemistry of Mass Extinction

  • L. Kump
  • Geography, Environmental Science
  • 2014



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