气候变化领域集成服务门户(CCPortal): Antarctic and Southern Ocean influences on Late Pliocene global cooling

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DOI	10.1073/pnas.1112248109
	Antarctic and Southern Ocean influences on Late Pliocene global cooling
	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.
发表日期	2012
ISSN	0027-8424
起始页码	6423
结束页码	6428
卷号	109 期号:17
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.
英文关键词	Glacial history; Late Neogene; Paleoclimate; Paleooceanography; West Antarctic ice sheet
语种	英语
scopus关键词	article; cooling; latitude; oscillation; paleoclimate; Pliocene; priority journal; sea; sea ice; sea surface temperature; sea surface waters; sediment
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158937
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, ...
推荐引用方式 GB/T 7714	McKay R.,Naish T.,Carter L.,et al. Antarctic and Southern Ocean influences on Late Pliocene global cooling[J],2012,109(17).
APA	McKay R..,Naish T..,Carter L..,Riesselman C..,Dunbar R..,...&Powell R.D..(2012).Antarctic and Southern Ocean influences on Late Pliocene global cooling.Proceedings of the National Academy of Sciences of the United States of America,109(17).
MLA	McKay R.,et al."Antarctic and Southern Ocean influences on Late Pliocene global cooling".Proceedings of the National Academy of Sciences of the United States of America 109.17(2012).