globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2273
论文题名:
Orbital forcing of the East Antarctic ice sheet during the Pliocene and Early Pleistocene
作者: Patterson M.O.; McKay R.; Naish T.; Escutia C.; Jimenez-Espejo F.J.; Raymo M.E.; Meyers S.R.; Tauxe L.; Brinkhuis H.; Klaus A.; Fehr A.; Bendle J.A.P.; Bijl P.K.; Bohaty S.M.; Carr S.A.; Dunbar R.B.; Flores J.A.; Gonzalez J.J.; Hayden T.G.; Iwai M.; Katsuki K.; Kong G.S.; Nakai M.; Olney M.P.; Passchier S.; Pekar S.F.; Pross J.; Riesselman C.R.; Röhl U.; Sakai T.; Shrivastava P.K.; Stickley C.E.; Sugasaki S.; Tuo S.; Van De Flierdt T.; Welsh K.; Williams T.; Yamane M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:11
起始页码: 841
结束页码: 847
语种: 英语
Scopus关键词: glacial debris ; glaciation ; global climate ; ice sheet ; iceberg ; orbital forcing ; Pleistocene ; Pliocene ; Antarctic Ice Sheet ; Antarctica ; East Antarctic Ice Sheet ; East Antarctica
英文摘要: The Pliocene and Early Pleistocene, between 5.3 and 0.8 million years ago, span a transition from a global climate state that was 2-3 °C warmer than present with limited ice sheets in the Northern Hemisphere to one that was characterized by continental-scale glaciations at both poles. Growth and decay of these ice sheets was paced by variations in the Earth's orbit around the Sun. However, the nature of the influence of orbital forcing on the ice sheets is unclear, particularly in light of the absence of a strong 20,000-year precession signal in geologic records of global ice volume and sea level. Here we present a record of the rate of accumulation of iceberg-rafted debris oshore from the East Antarctic ice sheet, adjacent to the Wilkes Subglacial Basin, between 4.3 and 2.2 million years ago. We infer that maximum iceberg debris accumulation is associated with the enhanced calving of icebergs during ice-sheet margin retreat. In the warmer part of the record, between 4.3 and 3.5 million years ago, spectral analyses show a dominant periodicity of about 40,000 years. Subsequently, the powers of the 100,000-year and 20,000-year signals strengthen. We suggest that, as the Southern Ocean cooled between 3.5 and 2.5 million years ago, the development of a perennial sea-ice field limited the oceanic forcing of the ice sheet. After this threshold was crossed, substantial retreat of the East Antarctic ice sheet occurred only during austral summer insolation maxima, as controlled by the precession cycle. © 2014 Macmillan Publishers Limited. 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/106393
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand; Instituto Andaluz de Ciencias de la Tierra, CSIC - University of Granada, Armilla, Spain; Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa, Japan; Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, New York, United States; Department of Geoscience, University OfWisconsin-Madison, 1215 W. Dayton St. MadisonWisconsin, United States; Scripps Institution of Oceanography, San Diego, California, United States; Marine Palynology and Paleoceanography, Laboratory of Paleobotany and Palynology, Utrecht University, Budapestlaan 4, CD Utrecht, Netherlands; United States Implementing Organization, Integrated Ocean Drilling Program, Texas A and M University, 1000 Discovery Drive, College Station, TX, United States; Institute for Applied Geophysics and Geothermal Energy, RWTH Aachen University, Mathieustrasse 6, Aachen, Germany; Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, United Kingdom; Marine Palynology and Paleoceanography, Laboratory of Palaeobotany and Palynology, Department of Earth Sciences, Budapestlaan 4, CD, Utrecht, Netherlands; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, European Way, Southampton, United Kingdom; Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado, United States; Department of Environmental Earth System Science, Stanford University, 325 Braun Hall, Stanford, California, United States; Department of Geology, Universidad de Salamanca, Salamanca, Spain; Instituto Andaluz de Ciencias de la Tierra, CSIC-UGR, Armilla, Spain; Department of Geology, Western Michigan University, 1187 Rood Hall, 1903 West Michigan Avenue, Kalamazoo, Michigan, United States; Department of Natural Science, Kochi University, 2-5-1 Akebono-cho, J-Kochi, Japan; Geological Research Division, Korea Institute of Geoscience and Mineral Resources, 30 Gajeong-dong, Yuseong-gu, Daejeon, South Korea; Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources, 30 Gajeong-dong, Yuseong-gu, Daejeon, South Korea; Education Department, Daito Bunka University, 1-9-1 Takashima-daira, Itabashi-ku, Tokyo, Japan; Department of Geology, University of South Florida, 4202 East Fowler Avenue, SCA 528, Tampa, Florida, United States; Earth and Environmental Studies, Montclair State University, 252 Mallory Hall, 1 Normal Avenue, Montclair, New Jersey, United States; School of Earth and Environmental Sciences, Queens College, 65-30 Kissena Boulevard, Flushing, New York, United States; Paleoenvironmental Dynamics Group, Institute of Earth Sciences, University of Heidelberg, Im Neuenheimer Feld 234, Heidelberg, Germany; Departments of Geology and Marine Science, University of Otago, PO Box 56, Dunedin, New Zealand; MARUM - Center for Marine Environmental Sciences, University of Bremen, Leobener Straße, Bremen, Germany; Department of Geology, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Japan; Antarctica Division, Geological Survey of India, NH5P, Faridabad, Haryana, India; Evolution Applied Limited, 50 Mitchell Way, Upper Rissington, Cheltenham, Gloucestershire, United Kingdom; Scripps Institution of Oceanography, University of California, San Diego, San Diego, California, United States; Department of Earth and Planetary Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku,Tokyo, Japan; State Key Laboratory of Marine Geology, Tongji University, 1239 Siping Road, Shanghai, China; Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, Prince Consort Road, London, United Kingdom; School of Earth Sciences, University of Queensland, St Lucia, Brisbane, Queensland, Australia

Recommended Citation:
Patterson M.O.,McKay R.,Naish T.,et al. Orbital forcing of the East Antarctic ice sheet during the Pliocene and Early Pleistocene[J]. Nature Geoscience,2014-01-01,7(11)
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