Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations

@article{Jurikova2020PermianTriassicME,
  title={Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations},
  author={Hana Jurikova and Marcus Gutjahr and Klaus Wallmann and Sascha Fl{\"o}gel and Volker Liebetrau and Renato Posenato and Lucia Angiolini and Claudio Garbelli and Uwe Brand and Michael Wiedenbeck and Anton Eisenhauer},
  journal={Nature Geoscience},
  year={2020},
  volume={13},
  pages={745 - 750}
}
The Permian/Triassic boundary approximately 251.9 million years ago marked the most severe environmental crisis identified in the geological record, which dictated the onwards course for the evolution of life. Magmatism from Siberian Traps is thought to have played an important role, but the causational trigger and its feedbacks are yet to be fully understood. Here we present a new boron-isotope-derived seawater pH record from fossil brachiopod shells deposited on the Tethys shelf that… 
Six-fold increase of atmospheric pCO2 during the Permian–Triassic mass extinction
TLDR
Mass balance modelling suggests that volcanic CO2 is probably not the only trigger of the carbon cycle perturbation, and that large quantities of 13C-depleted carbon emission from organic matter and methane were likely required during complex interactions with the Siberian Traps volcanism.
Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction
TLDR
Estimating the CO2 emission in an Earth system model based on new compound-specific carbon isotope records from the Finnmark Platform and an astronomically tuned age model finds that carbon emission pulses are accompanied by organic carbon burial, facilitated by widespread ocean anoxia, suggesting that the massive amount of greenhouse gases may have pushed the Earth system toward a critical tipping point.
Environmental crises at the Permian–Triassic mass extinction
The link between the Permian–Triassic mass extinction (252 million years ago) and the emplacement of the Siberian Traps Large Igneous Province (STLIP) was first proposed in the 1990s. However, the
Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth
In the wake of rapid CO2 release tied to the emplacement of the Siberian Traps, elevated temperatures were maintained for over five million years during the end-Permian biotic crisis. This protracted
Multiple Sulfur Isotope Geochemistry during the Permian-Triassic Transition
  • M. Saitoh
  • Environmental Science, Geography
    Geosciences
  • 2021
The end-Permian mass extinction was the largest biodiversity crisis in the Phanerozoic. Based on characteristic negative ∆33S signals of sedimentary pyrite, previous multiple sulfur isotope studies
Different triggers for the two pulses of mass extinction across the Permian and Triassic boundary
TLDR
The oxygen deficiency inferred by pyrite framboid data is associated with biotic declines above the MEH 2, suggesting that the anoxia plays an important role in the Permian-Triassic crisis period.
Carbon Isotope Chemostratigraphy Across the Permian-Triassic Boundary at Chaotian, China: Implications for the Global Methane Cycle in the Aftermath of the Extinction
During the end-Permian extinction, a substantial amount of methane (CH4) was likely released into the ocean-atmosphere system associated with the Siberian Traps volcanism, although fluctuations in
Bioindicators of severe ocean acidification are absent from the end-Permian mass extinction
The role of ocean acidification in the end-Permian mass extinction is highly controversial with conflicting hypotheses relating to its timing and extent. Observations and experiments on living
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