Ocean acidification and the Permo-Triassic mass extinction

@article{Clarkson2015OceanAA,
  title={Ocean acidification and the Permo-Triassic mass extinction},
  author={Matthew O Clarkson and Simone A. Kasemann and Rachel Wood and Timothy M. Lenton and Stuart J. Daines and Sylvain Richoz and Frank Ohnemueller and A. J. Meixner and Simon W. Poulton and Edward T. Tipper},
  journal={Science},
  year={2015},
  volume={348},
  pages={229 - 232}
}
Ocean acidification and mass extinction The largest mass extinction in Earth's history occurred at the Permian-Triassic boundary 252 million years ago. Several ideas have been proposed for what devastated marine life, but scant direct evidence exists. Clarkson et al. measured boron isotopes across this period as a highly sensitive proxy for seawater pH. It appears that, although the oceans buffered the acidifiying effects of carbon release from contemporary pulses of volcanism, buffering failed… Expand
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Global perturbation of the marine calcium cycle during the Permian-Triassic transition
A negative shift in the calcium isotopic composition of marine carbonate rocks spanning the end-Permian extinction horizon in South China has been used to argue for an ocean acidification event… Expand
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The cause for the end Permian mass extinction, the greatest challenge life on Earth faced in its geologic history, is still hotly debated by scientists. The most significant marker of this event is… Expand
Constraining the evolution of Neogene ocean carbonate chemistry using the boron isotope pH proxy
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TLDR
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. Expand
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Uranium isotopes in marine carbonates as a global ocean paleoredox proxy: A critical review
Abstract The protracted oxygenation of the ocean-atmosphere system is one of the most fundamental changes to the Earth system through its history. The uranium isotopic composition (238U/235U, denoted… Expand
Transition into a Hothouse World at the Permian–Triassic boundary—A model study
Abstract The Permian–Triassic boundary (PTB, ~ 252.3 Ma) marks the largest mass extinction of the Phanerozoic, with a loss of more than 90% of marine organisms, and is characterized by lethally hot… Expand
Oceanic redox evolution around the end-Permian mass extinction at Meishan, South China
Abstract The end-Permian marine extinction (EPME) eliminated >80% of species globally, making it the most severe extinction of the Phanerozoic. Anoxia and euxinia are potential kill mechanisms that… Expand
Mercury anomalies across the end Permian mass extinction in South China from shallow and deep water depositional environments
Abstract Life on Earth suffered its greatest bio-crisis since multicellular organisms rose 600 million years ago during the end-Permian mass extinction. Coincidence of the mass extinction with flood… Expand
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