globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1112248109
论文题名:
Antarctic and Southern Ocean influences on Late Pliocene global cooling
作者: McKay R.; Naish T.; Carter L.; Riesselman C.; Dunbar R.; Sjunneskog C.; Winter D.; Sangiorgi F.; Warren C.; Pagani M.; Schouten S.; Willmott V.; Levy R.; DeConto R.; Powell R.D.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2012
卷: 109, 期:17
起始页码: 6423
结束页码: 6428
语种: 英语
英文关键词: Glacial history ; Late Neogene ; Paleoclimate ; Paleooceanography ; West Antarctic ice sheet
Scopus关键词: article ; cooling ; latitude ; oscillation ; paleoclimate ; Pliocene ; priority journal ; sea ; sea ice ; sea surface temperature ; sea surface waters ; sediment
英文摘要: The influence of Antarctica and the Southern Ocean on Late Pliocene global climate reconstructions has remained ambiguous due to a lack of well-dated Antarctic-proximal, paleoenvironmental records. Here we present ice sheet, sea-surface temperature, and sea ice reconstructions from the ANDRILL AND-1B sediment core recovered from beneath the Ross Ice Shelf. We provide evidence for a major expansion of an ice sheet in the Ross Sea that began at ∼3.3 Ma, followed by a coastal sea surface temperature cooling of ∼2.5°C, a stepwise expansion of sea ice, and polynya-style deep mixing in the Ross Sea between 3.3 and 2.5 Ma. The intensification of Antarctic cooling resulted in strengthened westerly winds and invigorated ocean circulation. The associated northward migration of Southern Ocean fronts has been linked with reduced Atlantic Meridional Overturning Circulation by restricting surface water connectivity between the ocean basins, with implications for heat transport to the high latitudes of the North Atlantic. While our results do not exclude low-latitude mechanisms as drivers for Pliocene cooling, they indicate an additional role played by southern high-latitude cooling during development of the bipolar world.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162155
Appears in Collections:气候变化与战略

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作者单位: McKay, R., Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand; Naish, T., Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand; Carter, L., Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand; Riesselman, C., Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, United States, Eastern Geology and Paleoclimate Science Center, US Geological Survey, Reston, VA 20192, United States; Dunbar, R., Department of Environmental Earth Systems Science, Stanford University, Stanford, CA 94305, United States; Sjunneskog, C., Antarctic Marine Geology Research Facility, Florida State University, Tallahassee, FL 32306, United States; Winter, D., Rhithron Associates, Inc., Missoula, MT 59804, United States; Sangiorgi, F., Department of Earth Sciences, Faculty of Geosciences, Utrecht University, U3584 CD Utrecht, Netherlands; Warren, C., Department of Geology and Geophysics, Yale University, New Haven, CT 06520, United States; Pagani, M., Department of Geology and Geophysics, Yale University, New Haven, CT 06520, United States; Schouten, S., NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Organic Biogeochemistry, 1790 AB Den Burg, Texel, Netherlands; Willmott, V., NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Organic Biogeochemistry, 1790 AB Den Burg, Texel, Netherlands; Levy, R., GNS Science, Lower Hutt 5040, New Zealand; DeConto, R., Department of Geosciences, University of Massachusetts, Amherst, MA 01003, United States; Powell, R.D., Department of Geology and Environmental Geosciences, Northern Illinois University, DeKalb, IL 60115, United States

Recommended Citation:
McKay R.,Naish T.,Carter L.,et al. Antarctic and Southern Ocean influences on Late Pliocene global cooling[J]. Proceedings of the National Academy of Sciences of the United States of America,2012-01-01,109(17)
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