气候变化领域集成服务门户(CCPortal): Antarctic role in northern hemisphere glaciation

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DOI	10.1126/science.1255586
	Antarctic role in northern hemisphere glaciation
	Woodard S.C.; Rosenthal Y.; Miller K.G.; Wright J.D.; Chiu B.K.; Lawrence K.T.
发表日期	2014
ISSN	0036-8075
起始页码	847
结束页码	851
卷号	346 期号:6211
英文摘要	Earth's climate underwent a major transition from the warmth of the late Pliocene, when global surface temperatures were ∼2° to 3° C higher than today, to extensive Northern Hemisphere glaciation (NHG) ∼2.73 million years ago (Ma).We show that North Pacific deep waters were substantially colder (4° C) and probably fresher than the North Atlantic Deep Water before the intensification of NHG. At ∼2.73 Ma, the Atlantic-Pacific temperature gradient was reduced to <1° C, suggesting the initiation of stronger heat transfer from the North Atlantic to the deep Pacific.We posit that increased glaciation of Antarctica, deduced from the 21 ±10-meter sea-level fall from 3.15 to 2.75 Ma, and the development of a strong polar halocline fundamentally altered deep ocean circulation, which enhanced interhemispheric heat and salt transport, thereby contributing to NHG Copyright2014 by the American Association for the Advancement of Science; all rights reserved.
英文关键词	deep water; glaciation; heat transfer; Northern Hemisphere; oceanic circulation; Pliocene; surface temperature; temperature gradient; Antarctica; Article; glaciation; heat exchange; heat transfer; ice sheet; interglacial; North Atlantic deep water; Northern Hemisphere; nutrient content; periodicity; Pliocene; sea level; temperature sensitivity; Upper Pliocene; water temperature; Antarctica; greenhouse effect; heat; ice cover; sea; Antarctica; Atlantic Ocean; Atlantic Ocean (North); Pacific Ocean; Pacific Ocean (North); Antarctic Regions; Global Warming; Hot Temperature; Ice Cover; Oceans and Seas
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246055
作者单位	Department of Marine and Coastal Sciences, Rutgers University, Dudley RoadNB NJ 08901, United States; Department of Earth and Planetary Sciences, Rutgers University, 610 Taylor Road, Piscataway, NJ 08845 NJ, United States; Department of Geology and Environmental Geosciences, Lafayette College, 730 High Street, Easton, 18042 PA, United States
推荐引用方式 GB/T 7714	Woodard S.C.,Rosenthal Y.,Miller K.G.,et al. Antarctic role in northern hemisphere glaciation[J],2014,346(6211).
APA	Woodard S.C.,Rosenthal Y.,Miller K.G.,Wright J.D.,Chiu B.K.,&Lawrence K.T..(2014).Antarctic role in northern hemisphere glaciation.Science,346(6211).
MLA	Woodard S.C.,et al."Antarctic role in northern hemisphere glaciation".Science 346.6211(2014).