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Temporal stability of the neodymium isotope signature of the Holocene to glacial North Atlantic

van der Flierdt, Tina and Robinson, Laura F. and Adkins, Jess F. and Hemming, Sidney R. and Goldstein, Steven L. (2006) Temporal stability of the neodymium isotope signature of the Holocene to glacial North Atlantic. Paleoceanography, 21 (4). Art. No. PA4102. ISSN 0883-8305.

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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 timescales. Unlike nutrient proxies such as δ^(13)C or Cd/Ca, Nd isotopes are not thought to be altered in any significant way by biological processes, and thus they 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 long-standing 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 timescales for paleoceanography research.

Item Type:Article
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Adkins, Jess F.0000-0002-3174-5190
Additional Information:© 2006 American Geophysical Union. Received 17 March 2006; revised 8 July 2006; accepted 19 July 2006; published 25 November 2006. This study was supported by the Comer Science and Education Foundation and the Vetlesen Foundation Climate Center at LDEO. We thank Marty Q. Fleisher, N. Gary Hemming, Anna Cipriani, Allison M. Franzese, and Jennifer M. Cole for their help in keeping the labs and the mass specs running smoothly. We also thank two anonymous reviewers for their productive comments. This is Lamont contribution 6977.
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Comer Science and Education FoundationUNSPECIFIED
Vetlesen Foundation Climate Center at LDEOUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Lamont-Doherty Earth Observatory (LDEO) 6977
Issue or Number:4
Record Number:CaltechAUTHORS:20120828-104043357
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Official Citation:van de Flierdt, T., L. F. Robinson, J. F. Adkins, S. R. Hemming, and S. L. Goldstein (2006), Temporal stability of the neodymium isotope signature of the Holocene to glacial North Atlantic, Paleoceanography, 21, PA4102, doi:10.1029/2006PA001294
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33606
Deposited By: Ruth Sustaita
Deposited On:28 Aug 2012 20:51
Last Modified:24 Feb 2020 10:30

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