气候变化领域集成服务门户(CCPortal): North Atlantic ocean circulation and abrupt climate change during the last glaciation

CCPortal

DOI	10.1126/science.aaf5529
	North Atlantic ocean circulation and abrupt climate change during the last glaciation
	Henry L.G.; McManus J.F.; Curry W.B.; Roberts N.L.; Piotrowski A.M.; Keigwin L.D.
发表日期	2016
ISSN	0036-8075
起始页码	470
结束页码	474
卷号	353 期号:6298
英文摘要	The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in oceanic meridional heat transport may contribute to these repeated climate changes, which were most pronounced during marine isotope stage 3, the glacial interval 25 thousand to 60 thousand years ago. We examined climate and ocean circulation proxies throughout this interval at high resolution in a deep North Atlantic sediment core, combining the kinematic tracer protactinium/thorium (Pa/Th) with the deep water-mass tracer, epibenthic d13C. These indicators suggest reduced Atlantic overturning circulation during every cool northern stadial, with the greatest reductions during episodic Hudson Strait iceberg discharges, while sharp northern warming followed reinvigorated overturning. These results provide direct evidence for the ocean's persistent, central role in abrupt glacial climate change. Copyright 2016 by the American Association for the Advancement of Science. All rights reserved.
英文关键词	isotope; protactinium; radioisotope; rain; thorium; circulation; climate change; deep water; iceberg; last glaciation; marine isotope stage; Pleistocene; sediment core; Article; Atlantic Ocean; benthic foraminifera; Bermuda; climate change; foraminifer; glaciation; heat; ice sheet; kinematics; North Atlantic oscillation; Northern Hemisphere; priority journal; sediment; temperature; transport kinetics; Atlantic Ocean; Atlantic Ocean (North); Canada; Hudson Strait
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/243998
作者单位	Lamont-Doherty Earth Observatory (LDEO), Columbia University, Palisades, NY 10964, United States; Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Bermuda Institute of Ocean Sciences, St. George's, Bermuda; University of Cambridge, Department of Earth Sciences, Cambridge, CB2 3EQ, United Kingdom
推荐引用方式 GB/T 7714	Henry L.G.,McManus J.F.,Curry W.B.,et al. North Atlantic ocean circulation and abrupt climate change during the last glaciation[J],2016,353(6298).
APA	Henry L.G.,McManus J.F.,Curry W.B.,Roberts N.L.,Piotrowski A.M.,&Keigwin L.D..(2016).North Atlantic ocean circulation and abrupt climate change during the last glaciation.Science,353(6298).
MLA	Henry L.G.,et al."North Atlantic ocean circulation and abrupt climate change during the last glaciation".Science 353.6298(2016).