Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2014701118 |
Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction | |
Ying Cui; Mingsong Li; Elsbeth E. van Soelen; Francien Peterse; Wolfram M. Kürschner | |
2021-09-14 | |
发表期刊 | Proceedings of the National Academy of Science |
出版年 | 2021 |
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. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/337622 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Ying Cui,Mingsong Li,Elsbeth E. van Soelen,et al. Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction[J]. Proceedings of the National Academy of Science,2021. |
APA | Ying Cui,Mingsong Li,Elsbeth E. van Soelen,Francien Peterse,&Wolfram M. Kürschner.(2021).Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction.Proceedings of the National Academy of Science. |
MLA | Ying Cui,et al."Massive and rapid predominantly volcanic CO2 emission during the end-Permian mass extinction".Proceedings of the National Academy of Science (2021). |
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