North Atlantic paleoceanography: the last five millions years

Stein, R. S. and Kanamatsu, T. and Alvarez-Zarikan, C. and Higgins, S. M. and Channel, J. E. T. and Aboudeshish, E. and Ohno, M. and Acton, G. D. and Akimoto, K. and Bailey, I. and Bjørklund, K. R. and Evans, H. and Nielsen, S. H. H. and Fang, N. and Ferretti, P. and Gruetzner, J. and Guyodo, Y. J. B. and Hagino, K. and Harris, R. and Hatakeda, K. and Hefter, J. and Judge, S. A. and Kulhanek, D. K. and Nanayama, F. and Rashid, H. and Sierro Sanchez, F. J. and Voelker, A. and Zhai, Q. (2006) North Atlantic paleoceanography: the last five millions years. Eos, 87 (13). pp. 129-133. DOI 10.1029/2006EO130002

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Abstract

In the North Atlantic, cold, relatively salty water sinks in the icy Labrador and Greenland seas, forming North Atlantic Deep Water (NADW). This circulates through the global ocean, driving ocean overturning and global heat transport and, thus, impacting global climate. As one of the most climatically sensitive regions on Earth, the North Atlantic has experienced abrupt changes to its ocean-atmosphere-cryosphere system, triggered by fluctuations in meltwater delivery to source areas of NADW formation. For about the past 100 thousand years, these abrupt jumps in climate state have manifested as ‘Dansgaard/Oeschger’ (D/O) oscillations (millennial-scale warm-cold oscillations) and ‘Heinrich’ events in ice and marine sediment cores, respectively [e.g., Dansgaard et al.,1993; Bond and Lotti, 1995]. These Heinrich events are characterized as huge input of ice-rafted debris (IRD) and meltwater pulses, documenting episodes of sudden instability and collapse of the current Greenland ice sheets and the Laurentide ice sheet, the latter of which covered northern North America several times during the Pleistocene Epoch.

Item Type: Article
Uncontrolled Keywords: 2006 AREP IA52 2006 P
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Eos
Volume: 87
Page Range: pp. 129-133
Identification Number: 10.1029/2006EO130002
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:03
Last Modified: 23 Jul 2013 10:08
URI: http://eprints.esc.cam.ac.uk/id/eprint/710

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