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The New Zealand Kauri (Agathis Australis) Research Project: A Radiocarbon Dating Intercomparison of Younger Dryas Wood and Implications for IntCal13

Published online by Cambridge University Press:  09 February 2016

Alan Hogg*
Affiliation:
Radiocarbon Laboratory, University of Waikato, PB 3105, Hamilton 3240, New Zealand
Chris Turney
Affiliation:
ARC Laureate Fellow, Climate Change Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia
Jonathan Palmer
Affiliation:
Geography, CLES, University of Exeter, Exeter, Devon EX4 4RJ, United Kingdom Gondwana Tree-Ring Laboratory, P.O. Box 14, Little River, Canterbury 7546, New Zealand
John Southon
Affiliation:
Keck-CCAMS Group, Earth System Science Dept., University of California, Irvine, B321 Croul Hall, Irvine, California 92697, USA
Bernd Kromer
Affiliation:
Heidelberg Academy of Sciences, University of Heidelberg, Germany
Christopher Bronk Ramsey
Affiliation:
Oxford Radiocarbon Accelerator Unit, University of Oxford, Dyson Perrins Building, South Parks Rd., Oxford OX1 3QY, United Kingdom
Gretel Boswijk
Affiliation:
Tree-Ring Laboratory, School of Environment, University of Auckland, PB 92019, Auckland, New Zealand
Pavla Fenwick
Affiliation:
Gondwana Tree-Ring Laboratory, P.O. Box 14, Little River, Canterbury 7546, New Zealand
Alexandra Noronha
Affiliation:
Keck-CCAMS Group, Earth System Science Dept., University of California, Irvine, B321 Croul Hall, Irvine, California 92697, USA
Richard Staff
Affiliation:
Oxford Radiocarbon Accelerator Unit, University of Oxford, Dyson Perrins Building, South Parks Rd., Oxford OX1 3QY, United Kingdom
Michael Friedrich
Affiliation:
Hohenheim University, Institute of Botany (210), Garbenstrasse 30, D-70593 Stuttgart, Germany
Linda Reynard
Affiliation:
Oxford Radiocarbon Accelerator Unit, University of Oxford, Dyson Perrins Building, South Parks Rd., Oxford OX1 3QY, United Kingdom Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, Massachusetts 02138, USA
Dominik Guetter
Affiliation:
Laboratory of Ion Beam Physics, ETH Zurich, Schafmattstrasse 20, CH-8093 Zurich, Switzerland
Lukas Wacker
Affiliation:
Laboratory of Ion Beam Physics, ETH Zurich, Schafmattstrasse 20, CH-8093 Zurich, Switzerland
Richard Jones
Affiliation:
Geography, CLES, University of Exeter, Exeter, Devon EX4 4RJ, United Kingdom
*
Corresponding author. Email: alan.hogg@waikato.ac.nz.
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Abstract

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Wc describe here the New Zealand kauri (Agathis australis) Younger Dryas (YD) research project, which aims to undertake Δ14C analysis of ∼140 decadal floating wood samples spanning the time interval ∼13.1–11.7 kyr cal BP. We report 14C intercomparison measurements being undertaken by the carbon dating laboratories at University of Waikato (Wk), University of California at Irvine (UCI), and University of Oxford (OxA). The Wk, UCI, and OxA laboratories show very good agreement with an interlaboratory comparison of 12 successive decadal kauri samples (average offsets from consensus values of –7 to +4 14C yr). A University of Waikato/University of Heidelberg (HD) intercomparison involving measurement of the YD-age Swiss larch tree Ollon505, shows a HD/Wk offset of ∼10–20 14C yr (HD younger), and strong evidence that the positioning of the Ollon505 series is incorrect, with a recommendation that the 14C analyses be removed from the IntCal calibration database.

Type
Research Article
Copyright
Copyright © 2013 by the Arizona Board of Regents on behalf of the University of Arizona 

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