globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1902469117
论文题名:
Early Last Interglacial ocean warming drove substantial ice mass loss from Antarctica
作者: Turney C.S.M.; Fogwill C.J.; Golledge N.R.; McKay N.P.; van Sebille E.; Jones R.T.; Etheridge D.; Rubino M.; Thornton D.P.; Davies S.M.; Ramsey C.B.; Thomas Z.A.; Bird M.I.; Munksgaard N.C.; Kohno M.; Woodward J.; Winter K.; Weyrich L.S.; Rootes C.M.; Millman H.; Albert P.G.; Rivera A.; van Ommen T.; Curran M.; Moy A.; Rahmstorf S.; Kawamura K.; Hillenbrand C.-D.; Weber M.E.; Manning C.J.; Young J.; Cooper A.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:8
起始页码: 3996
结束页码: 4006
语种: 英语
英文关键词: Antarctic ice sheets ; Marine ice sheet instability (MISI) ; Paleoclimatology ; Polar amplification ; Tipping element
Scopus关键词: Antarctica ; article ; body weight ; DNA determination ; environmental change ; hydration ; ice sheet ; interglacial ; paleoclimatology ; sea ice ; sea level ; warming ; Weddell Sea
英文摘要: The future response of the Antarctic ice sheet to rising temperatures remains highly uncertain. A useful period for assessing the sensitivity of Antarctica to warming is the Last Interglacial (LIG) (129 to 116 ky), which experienced warmer polar temperatures and higher global mean sea level (GMSL) (+6 to 9 m) relative to present day. LIG sea level cannot be fully explained by Greenland Ice Sheet melt (∼2 m), ocean thermal expansion, and melting mountain glaciers (∼1 m), suggesting substantial Antarctic mass loss was initiated by warming of Southern Ocean waters, resulting from a weakening Atlantic meridional overturning circulation in response to North Atlantic surface freshening. Here, we report a blue-ice record of ice sheet and environmental change from the Weddell Sea Embayment at the periphery of the marine-based West Antarctic Ice Sheet (WAIS), which is underlain by major methane hydrate reserves. Constrained by a widespread volcanic horizon and supported by ancient microbial DNA analyses, we provide evidence for substantial mass loss across the Weddell Sea Embayment during the LIG, most likely driven by ocean warming and associated with destabilization of subglacial hydrates. Ice sheet modeling supports this interpretation and suggests that millennial-scale warming of the Southern Ocean could have triggered a multimeter rise in global sea levels. Our data indicate that Antarctica is highly vulnerable to projected increases in ocean temperatures and may drive ice–climate feedbacks that further amplify warming. © 2020 National Academy of Sciences. 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/162265
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作者单位: Turney, C.S.M., Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW 2033, Australia, Australian Research Council Centre of Excellence in Australian Biodiversity and Heritage, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW 2033, Australia, Chronos 14Carbon-Cycle Facility, University of New South Wales, Sydney, NSW 2052, Australia; Fogwill, C.J., Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW 2033, Australia, School of Geography, Geology and the Environment, Keele University, Staffordshire, ST5 5BG, United Kingdom; Golledge, N.R., Antarctic Research Centre, Victoria University of Wellington, Wellington, 6140, New Zealand, Environment and Climate, GNS Science, Avalon, Lower Hutt, 5011, New Zealand; McKay, N.P., School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ 86011, United States; van Sebille, E., Grantham Institute, Imperial College London, London, SW7 2AZ, United Kingdom, Department of Physics, Imperial College London, London, SW7 2AZ, United Kingdom, Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, 3584 CS, Netherlands; Jones, R.T., Department of Geography, Exeter University, Devon, EX4 4RJ, United Kingdom; Etheridge, D., Climate Science Centre, Commonwealth Scientific and Industrial Research Organisation Ocean and Atmosphere, Aspendale, VIC 3195, Australia; Rubino, M., School of Geography, Geology and the Environment, Keele University, Staffordshire, ST5 5BG, United Kingdom, Climate Science Centre, Commonwealth Scientific and Industrial Research Organisation Ocean and Atmosphere, Aspendale, VIC 3195, Australia, Dipartimento di Matematica e Fisica, Università della Campania “Luigi Vanvitelli,”, Caserta, 81100, Italy; Thornton, D.P., Climate Science Centre, Commonwealth Scientific and Industrial Research Organisation Ocean and Atmosphere, Aspendale, VIC 3195, Australia; Davies, S.M., Department of Geography, Swansea University, Swansea, SA2 8PP, United Kingdom; Ramsey, C.B., Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford, OX1 3TG, United Kingdom; Thomas, Z.A., Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW 2033, Australia, Australian Research Council Centre of Excellence in Australian Biodiversity and Heritage, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW 2033, Australia, Chronos 14Carbon-Cycle Facility, University of New South Wales, Sydney, NSW 2052, Australia; Bird, M.I., Centre for Tropical Environmental and Sustainability Science, College of Science and Engineering, James Cook University, Cairns, QLD 4870, Australia, Australian Research Council Centre of Excellence in Australian Biodiversity and Heritage, James Cook University, Cairns, QLD 4870, Australia; Munksgaard, N.C., Australian Research Council Centre of Excellence in Australian Biodiversity and Heritage, James Cook University, Cairns, QLD 4870, Australia, Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin NT, 0909, Australia; Kohno, M., Department of Geochemistry, Geoscience Center, University of Göttingen, Göttingen, 37077, Germany; Woodward, J., Department of Geography and Environmental Sciences, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, United Kingdom; Winter, K., Department of Geography and Environmental Sciences, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, United Kingdom; Weyrich, L.S., Australian Centre for Ancient DNA, University of Adelaide, Adelaide, SA 5005, Australia, Australian Research Council Centre of Excellence in Australian Biodiversity and Heritage, University of Adelaide, Adelaide, SA 5005, Australia; Rootes, C.M., Department of Geography, University of Sheffield, Sheffield, S3 7ND, United Kingdom; Millman, H., Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, NSW 2033, Australia; Albert, P.G., Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford, OX1 3TG, United Kingdom; Rivera, A., Departamento de Geografia, Universidad de Chile, Santiago, 8331051, Chile; van Ommen, T., Department of the Environment and Energy, Australian Antarctic Division, Kingston, TAS 7050, Australia, Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS 7001, Australia; Curran, M., Department of the Environment and Energy, Australian Antarctic Division, Kingston, TAS 7050, Australia, Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS 7001, Australia; Moy, A., Department of the Environment and Energy, Australian Antarctic Division, Kingston, TAS 7050, Australia, Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS 7001, Australia; Rahmstorf, S., Earth System Analysis, Potsdam Institute for Climate Impact Research, Potsdam, D-14412, Germany, Institute of Physics and Astronomy, University of Potsdam, Potsdam, 14476, Germany; Kawamura, K., Research Organizations of Information and Systems, National Institute of Polar Research, Tachikawa, Tokyo 190-8518, Japan, Department of Polar Science, Graduate University for Advanced Studies, Tachikawa, Tokyo 190-8518, Japan, Institute of Biogeosciences, Japan Agency for Marine–Earth Science and Technology, Yokosuka, 237-0061, Japan; Hillenbrand, C.-D., Palaeo Environments, Ice Sheets and Climate Change,, British Antarctic Survey, Cambridge, CB3 0ET, United Kingdom; Weber, M.E., Steinmann Institute, University of Bonn, Bonn, 53115, Germany; Manning, C.J., Department of Earth Sciences, Royal Holloway University of London, Surrey, TW20 OEX, United Kingdom; Young, J., Australian Centre for Ancient DNA, University of Adelaide, Adelaide, SA 5005, Australia, Australian Research Council Centre of Excellence in Australian Biodiversity and Heritage, University of Adelaide, Adelaide, SA 5005, Australia; Cooper, A., South Australian Museum, Adelaide, SA 5005, Australia

Recommended Citation:
Turney C.S.M.,Fogwill C.J.,Golledge N.R.,et al. Early Last Interglacial ocean warming drove substantial ice mass loss from Antarctica[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(8)
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