Atmospheric C-14 variations derived from tree rings during the early Younger Dryas

Hua, Quan, Barbetti, Mike, Fink, David, Kaiser, Klaus Felix, Friedrich, Michael, Kromer, Bernd, Levchenko, Vladimir A., Zoppi, Ugo, Smith, Andrew M. and Bertuch, Fiona (2009) Atmospheric C-14 variations derived from tree rings during the early Younger Dryas. Quaternary Science Reviews, 28 25-26: 2982-2990. doi:10.1016/j.quascirev.2009.08.013

Author Hua, Quan
Barbetti, Mike
Fink, David
Kaiser, Klaus Felix
Friedrich, Michael
Kromer, Bernd
Levchenko, Vladimir A.
Zoppi, Ugo
Smith, Andrew M.
Bertuch, Fiona
Title Atmospheric C-14 variations derived from tree rings during the early Younger Dryas
Formatted title
Atmospheric C-14 variations derived from tree rings during the early Younger Dryas
Journal name Quaternary Science Reviews   Check publisher's open access policy
ISSN 0277-3791
Publication date 2009-12-01
Sub-type Article (original research)
DOI 10.1016/j.quascirev.2009.08.013
Open Access Status Not Open Access
Volume 28
Issue 25-26
Start page 2982
End page 2990
Total pages 9
Place of publication United Kingdom
Publisher Pergamon
Language eng
Formatted abstract
Atmospheric radiocarbon variations over the Younger Dryas interval, from ∼13,000 to 11,600 cal yr BP, are of immense scientific interest because they reveal crucial information about the linkages between climate, ocean circulation and the carbon cycle. However, no direct and reliable atmospheric 14C records based on tree rings for the entire Younger Dryas have been available. In this paper, we present (1) high-precision 14C measurements on the extension of absolute tree-ring chronology from 12,400 to 12,560 cal yr BP and (2) high-precision, high-resolution atmospheric 14C record derived from a 617-yr-long tree-ring chronology of Huon pine from Tasmania, Australia, spanning the early Younger Dryas. The new tree-ring 14C records bridge the current gap in European tree-ring radiocarbon chronologies during the early Younger Dryas, linking the floating Lateglacial Pine record to the absolute tree-ring timescale. A continuous and reliable atmospheric 14C record for the past 14,000 cal yr BP including the Younger Dryas is now available. The new records indicate that the abrupt rise in atmospheric Δ14C associated with the Younger Dryas onset occurs at ∼12,760 cal yr BP, ∼240 yrs later than that recorded in Cariaco varves, with a smaller magnitude of ∼40‰ followed by several centennial Δ14C variations of 20-25‰. Comparing the tree-ring Δ14C to marine-derived Δ14C and modelled Δ14C based on ice-core 10Be fluxes, we conclude that changes in ocean circulation were mainly responsible for the Younger Dryas onset, while a combination of changes in ocean circulation and 14C production rate were responsible for atmospheric Δ14C variations for the remainder of the Younger Dryas. © 2009 Elsevier Ltd. All rights reserved.
Keyword Papua-New-Guinea
Radiocarbon Age Calibration
TH-230 ages
Ice core
Circulation changes
Climate changes
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Microscopy and Microanalysis Publications
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Citation counts: TR Web of Science Citation Count  Cited 42 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 47 times in Scopus Article | Citations
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Created: Sun, 06 Dec 2009, 10:01:15 EST