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Coherent deep flow variation in the Iceland and American basins during the last interglacial

Hall, Ian Robert, McCave, I. N., Chapman, M. R. and Shackleton, N. J. 1998. Coherent deep flow variation in the Iceland and American basins during the last interglacial. Earth and Planetary Science Letters 164 (1-2) , pp. 15-21. 10.1016/S0012-821X(98)00209-X

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Abstract

The first direct evidence that the deepflow speed of North Atlantic Deep Water (NADW) in the South Iceland and North AmericanBasins declined dramatically over a period of a few hundred years at about 120,000 years ago is presented. The flow rate inferred from silt grain-size then rose into the subsequent cool period (stage 5d). These changes are clear and synchronous in records from both locations. These circulation events are recorded less markedly in chemical and isotopic proxies for the nutrient status of water masses. The congruence of flowvariation and hydrography at the two separated sites suggests they are primarily controlled by variation in the deep thermohaline circulation.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Subjects: G Geography. Anthropology. Recreation > GC Oceanography
Uncontrolled Keywords: North Atlantic; North Atlantic Deep Water; thermohaline circulation; silt; interglacial environment
Publisher: Elsevier
ISSN: 0012-821X
Last Modified: 04 Jun 2017 04:00
URI: http://orca.cf.ac.uk/id/eprint/30537

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