Four climate cycles of recurring deep and surface water destabilizations on the Iberian Margin

Martrat, Belen; Grimalt, Joan O.; Shackleton, Nicholas J.; de Abreu, Lucia; Hutterli, Manuel A.; Stocker, Thomas F.. 2007 Four climate cycles of recurring deep and surface water destabilizations on the Iberian Margin. Science, 317 (5837). 502-507. 10.1126/science.1139994

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Abstract/Summary

Centennial climate variability over the last ice age exhibits clear bipolar behavior. High-resolution analyses of marine sediment cores from the Iberian margin trace a number of associated changes simultaneously. Proxies of sea surface temperature and water mass distribution, as well as relative biomarker content, demonstrate that this typical north-south coupling was pervasive for the cold phases of climate during the past 420,000 years. Cold episodes after relatively warm and largely ice-free periods occurred when the predominance of deep water formation changed from northern to southern sources. These results reinforce the connection between rapid climate changes at Mediterranean latitudes and century-to-millennial variability in northern and southern polar regions.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1126/science.1139994
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Climate and Chemistry - Forcings and Phasings in the Earth System
ISSN:	0036-8075
Additional Keywords:	Palaeoclimate
NORA Subject Terms:	Earth Sciences
Date made live:	10 Dec 2007 11:59 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/1401

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