Rapid ocean acidification and protracted Earth system recovery followed the end-Cretaceous Chicxulub impact
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- Michael J. Henehan
- Department of Geology & Geophysics, Yale University, New Haven, CT 06520;
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- Andy Ridgwell
- School of Geographical Sciences, Bristol University, Bristol BS8 1SS, United Kingdom;
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- Ellen Thomas
- Department of Geology & Geophysics, Yale University, New Haven, CT 06520;
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- Shuang Zhang
- Department of Geology & Geophysics, Yale University, New Haven, CT 06520;
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- Laia Alegret
- Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Departamento de Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain;
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- Daniela N. Schmidt
- School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, United Kingdom;
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- James W. B. Rae
- School of Earth & Environmental Sciences, University of St. Andrews, St. Andrews KY16 9AL, United Kingdom;
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- James D. Witts
- Division of Paleontology, American Museum of Natural History, New York, NY 10024;
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- Neil H. Landman
- Division of Paleontology, American Museum of Natural History, New York, NY 10024;
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- Sarah E. Greene
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom;
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- Brian T. Huber
- Department of Paleobiology, Smithsonian Institution, Washington, DC 20560
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- James R. Super
- Department of Geology & Geophysics, Yale University, New Haven, CT 06520;
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- Noah J. Planavsky
- Department of Geology & Geophysics, Yale University, New Haven, CT 06520;
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- Pincelli M. Hull
- Department of Geology & Geophysics, Yale University, New Haven, CT 06520;
抄録
<jats:title>Significance</jats:title> <jats:p>Debate lingers over what caused the last mass extinction 66 million years ago, with intense volcanism and extraterrestrial impact the most widely supported hypotheses. However, without empirical evidence for either’s exact environmental effects, it is difficult to discern which was most important in driving extinction. It is also unclear why recovery of biodiversity and carbon cycling in the oceans was so slow after an apparently sudden extinction event. In this paper, we show (using boron isotopes and Earth system modeling) that the impact caused rapid ocean acidification, and that the resulting ecological collapse in the oceans had long-lasting effects for global carbon cycling and climate. Our data suggest that impact, not volcanism, was key in driving end-Cretaceous mass extinction.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 116 (45), 22500-22504, 2019-10-21
Proceedings of the National Academy of Sciences