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Tree rings and ice cores reveal C-14 calibration uncertainties during the Younger Dryas

Muscheler, Raimund LU ; Kromer, B; Björck, Svante LU ; Svensson, A; Friedrich, M; Kaiser, K F and Southon, J (2008) In Nature Geoscience 1(4). p.263-267
Abstract
The Younger Dryas interval during the Last Glacial Termination was an abrupt return to glacial-like conditions punctuating the transition to a warmer, interglacial climate. Despite recent advances in the layer counting of ice-core records of the termination, the timing and length of the Younger Dryas remain controversial. Also, a steep rise in the concentration of atmospheric radiocarbon at the onset of the interval, recorded primarily in the Cariaco Basin, has been difficult to reconcile with simulations of the Younger Dryas carbon cycle. Here we discuss a radiocarbon chronology from a tree-ring record covering the Late Glacial period that has not been absolutely dated. We correlate the chronology to ice-core timescales using the common... (More)
The Younger Dryas interval during the Last Glacial Termination was an abrupt return to glacial-like conditions punctuating the transition to a warmer, interglacial climate. Despite recent advances in the layer counting of ice-core records of the termination, the timing and length of the Younger Dryas remain controversial. Also, a steep rise in the concentration of atmospheric radiocarbon at the onset of the interval, recorded primarily in the Cariaco Basin, has been difficult to reconcile with simulations of the Younger Dryas carbon cycle. Here we discuss a radiocarbon chronology from a tree-ring record covering the Late Glacial period that has not been absolutely dated. We correlate the chronology to ice-core timescales using the common cosmic production signal in tree-ring C-14 and ice-core Be-10 concentrations. The results of this correlation suggest that the Cariaco record may be biased by changes in the concentration of radiocarbon in the upper ocean during the early phase of the Younger Dryas climate reversal in the Cariaco basin. This bias in the marine record may also affect the accuracy of a widely used radiocarbon calibration curve over this interval. Our tree-ring-based radiocarbon record is easily reconciled with simulated production rates and carbon-cycle changes associated with reduced ocean ventilation during the Younger Dryas. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Geoscience
volume
1
issue
4
pages
263 - 267
publisher
Nature Publishing Group
external identifiers
  • wos:000256433500022
  • scopus:55249092394
ISSN
1752-0908
DOI
10.1038/ngeo128
language
English
LU publication?
yes
id
6f6717f1-d029-4b30-a12a-28f51f6f2554 (old id 1201176)
date added to LUP
2008-09-12 15:31:06
date last changed
2017-10-22 03:42:20
@article{6f6717f1-d029-4b30-a12a-28f51f6f2554,
  abstract     = {The Younger Dryas interval during the Last Glacial Termination was an abrupt return to glacial-like conditions punctuating the transition to a warmer, interglacial climate. Despite recent advances in the layer counting of ice-core records of the termination, the timing and length of the Younger Dryas remain controversial. Also, a steep rise in the concentration of atmospheric radiocarbon at the onset of the interval, recorded primarily in the Cariaco Basin, has been difficult to reconcile with simulations of the Younger Dryas carbon cycle. Here we discuss a radiocarbon chronology from a tree-ring record covering the Late Glacial period that has not been absolutely dated. We correlate the chronology to ice-core timescales using the common cosmic production signal in tree-ring C-14 and ice-core Be-10 concentrations. The results of this correlation suggest that the Cariaco record may be biased by changes in the concentration of radiocarbon in the upper ocean during the early phase of the Younger Dryas climate reversal in the Cariaco basin. This bias in the marine record may also affect the accuracy of a widely used radiocarbon calibration curve over this interval. Our tree-ring-based radiocarbon record is easily reconciled with simulated production rates and carbon-cycle changes associated with reduced ocean ventilation during the Younger Dryas.},
  author       = {Muscheler, Raimund and Kromer, B and Björck, Svante and Svensson, A and Friedrich, M and Kaiser, K F and Southon, J},
  issn         = {1752-0908},
  language     = {eng},
  number       = {4},
  pages        = {263--267},
  publisher    = {Nature Publishing Group},
  series       = {Nature Geoscience},
  title        = {Tree rings and ice cores reveal C-14 calibration uncertainties during the Younger Dryas},
  url          = {http://dx.doi.org/10.1038/ngeo128},
  volume       = {1},
  year         = {2008},
}