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Temporal stability of the neodymium isotope signature of the Holocene to glacial North Atlantic
Authors
Adkins
Andersson
+47 more
Boyle
Burton
Cheng
Curry
Curry
Dickson
Duplessy
Edwards
Frank
Goldstein
Goldstein
Hillaire-Marcel
Innocent
Jacobsen
Jess F. Adkins
Keigwin
Keigwin
Lacan
Lacan
Lacan
Lacan
Laura F. Robinson
Marchitto
Marchitto
Martin
Oppo
Piepgras
Piepgras
Piotrowski
Piotrowski
Reynolds
Robinson
Robinson
Rutberg
Sarnthein
Schmitz
Sholkovitz
Sidney R. Hemming
Steven L. Goldstein
Tina van de Flierdt
van de Flierdt
Vance
Vance
von Blanckenburg
von Blanckenburg
von Blanckenburg
Öhlander
Publication date
25 November 2006
Publisher
'American Geophysical Union (AGU)'
Doi
Cite
Abstract
Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 21 (2006): PA4102, doi:10.1029/2006PA001294.The neodymium isotopic composition of marine precipitates is increasingly recognized as a powerful tool for identifying changes in ocean circulation and mixing on million year to millennial time-scales. Unlike nutrient proxies such as δ13C or Cd/Ca, Nd isotopes are not thought to be altered in any significant way by biological processes, and thus can serve as a quasi-conservative water mass tracer. However, the application of Nd isotopes in understanding the role of thermohaline circulation in rapid climate change is currently hindered by the lack of direct constraints on the signature of the North Atlantic end-member through time. Here we present the first results of Nd isotopes measured in U-Th dated deep-sea corals from the New England seamounts in the northwest Atlantic Ocean. Our data are consistent with the conclusion that the Nd isotopic composition of North Atlantic deep and intermediate water has remained nearly constant through the last glacial cycle. The results address longstanding concerns that there may have been significant changes in the Nd isotopic composition of the North Atlantic end member during this interval, and substantiate the applicability of this novel tracer on millennial time-scales for palaeoceanography research.This study was supported by the Comer Science and Education Foundation and the Vetlesen Foundation Climate Center at L-DEO
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