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

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 subse...

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Bibliographic Details
Published in:Earth and Planetary Science Letters
Main Authors: Hall, Ian Robert, McCave, I. N., Chapman, M. R., Shackleton, N. J.
Format: Article in Journal/Newspaper
Language:unknown
Published: Elsevier 1998
Subjects:
GC Oceanography
Iceland
NADW
North Atlantic Deep Water
North Atlantic
Online Access:https://orca.cardiff.ac.uk/id/eprint/30537/
https://doi.org/10.1016/S0012-821X(98)00209-X
Description
Summary: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.

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