globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2822
论文题名:
Climate, pCO2 and terrestrial carbon cycle linkages during late Palaeozoic glacial-interglacial cycles
作者: Montañez I.P.; McElwain J.C.; Poulsen C.J.; White J.D.; Dimichele W.A.; Wilson J.P.; Griggs G.; Hren M.T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:11
起始页码: 824
结束页码: 828
语种: 英语
Scopus关键词: carbon cycle ; carbon dioxide ; carbon sequestration ; eccentricity ; fossil record ; glacial-interglacial cycle ; glacioeustacy ; ice sheet ; Paleozoic ; radiative forcing ; sea level change ; terrestrial environment ; tropical forest ; vegetation cover
英文摘要: Earth's last icehouse, 300 million years ago, is considered the longest-lived and most acute of the past half-billion years, characterized by expansive continental ice sheets and possibly tropical low-elevation glaciation. This atypical climate has long been attributed to anomalous radiative forcing promoted by a 3% lower incident solar luminosity and sustained low atmospheric p CO2 (≤300 ppm). Climate models, however, indicate a CO2 sensitivity of ice-sheet distribution and sea-level response that questions this long-standing climate paradigm by revealing major discrepancy between hypothesized ice distribution, p CO2, and geologic records of glacioeustasy. Here we present a high-resolution record of atmospheric p CO2 for 16 million years of the late Palaeozoic, developed using soil carbonate-based and fossil leaf-based proxies, that resolves the climate conundrum. Palaeo-fluctuations on the 10 5 -yr scale occur within the CO2 range predicted for anthropogenic change and co-vary with substantial change in sea level and ice volume. We further document coincidence between p CO2 changes and repeated restructuring of Euramerican tropical forests that, in conjunction with modelled vegetation shifts, indicate a more dynamic carbon sequestration history than previously considered and a major role for terrestrial vegetation-CO2 feedbacks in driving eccentricity-scale climate cycles of the late Palaeozoic icehouse. © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105893
Appears in Collections:气候减缓与适应
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作者单位: Department of Earth and Planetary Sciences, University of California, Davis, CA, United States; Earth Institute, School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Department of Biology, Baylor University, Waco, TX, United States; Department of Paleobiology, Smithsonian Museum of Natural History, Washington, DC, United States; Department of Biology, Haverford College, Haverford, PA, United States; Center for Integrative Geosciences, University of Connecticut, Storrs, CT, United States

Recommended Citation:
Montañez I.P.,McElwain J.C.,Poulsen C.J.,et al. Climate, pCO2 and terrestrial carbon cycle linkages during late Palaeozoic glacial-interglacial cycles[J]. Nature Geoscience,2016-01-01,9(11)
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