气候变化领域集成服务门户(CCPortal): Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction

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DOI	10.1073/pnas.2014701118
	Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction
	Cui Y.; Li M.; Van Soelen E.E.; Peterse F.; Kürschner W.M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:37
英文摘要	The end-Permian mass extinction event (∼252 Mya) is associated with one of the largest global carbon cycle perturbations in the Phanerozoic and is thought to be triggered by the Siberian Traps volcanism. Sizable carbon isotope excursions (CIEs) have been found at numerous sites around the world, suggesting massive quantities of 13C-depleted CO2 input into the ocean and atmosphere system. The exact magnitude and cause of the CIEs, the pace of CO2 emission, and the total quantity of CO2, however, remain poorly known. Here, we quantify 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. By quantitatively comparing the modeled surface ocean pH and boron isotope pH proxy, a massive (∼36,000 Gt C) and rapid emission (∼5 Gt C yr-1) of largely volcanic CO2 source (∼-15%) is necessary to drive the observed pattern of CIE, the abrupt decline in surface ocean pH, and the extreme global temperature increase. This suggests that the massive amount of greenhouse gases may have pushed the Earth system toward a critical tipping point, beyond which extreme changes in ocean pH and temperature led to irreversible mass extinction. The comparatively amplified CIE observed in higher plant leaf waxes suggests that the surface waters of the Finnmark Platform were likely out of equilibrium with the initial massive centennial-scale release of carbon from the massive Siberian Traps volcanism, supporting the rapidity of carbon injection. Our modeling work reveals that carbon emission pulses are accompanied by organic carbon burial, facilitated by widespread ocean anoxia. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	CO2; Compound specific carbon isotopes; Earth system model; End-Permian mass extinction
语种	英语
scopus关键词	boron; carbon; carbon 13; surface water; acidification; Article; astronomy; atmosphere; carbon cycle; carbon footprint; controlled study; dissolution; end Permian mass extinction; environmental change; environmental temperature; extraction; greenhouse gas; isolation procedure; pH; plant leaf; sea; sedimentation rate; surface area
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238397
作者单位	Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, United States; School of Earth and Space Sciences, Peking University, Beijing, 100871, China; Department of Geosciences, University of Oslo, Oslo, 0371, Norway; Department of Earth Sciences, Utrecht University, Utrecht, 3584 CB, Netherlands
推荐引用方式 GB/T 7714	Cui Y.,Li M.,Van Soelen E.E.,et al. Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction[J],2021,118(37).
APA	Cui Y.,Li M.,Van Soelen E.E.,Peterse F.,&Kürschner W.M..(2021).Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction.Proceedings of the National Academy of Sciences of the United States of America,118(37).
MLA	Cui Y.,et al."Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction".Proceedings of the National Academy of Sciences of the United States of America 118.37(2021).