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Bayesian Evaluation of the Southern Hemisphere Radiocarbon Offset during the Holocene

Published online by Cambridge University Press:  18 July 2016

Alan Hogg ,
Christopher Bronk Ramsey ,
Chris Turney  and
Jonathan Palmer
Alan Hogg*
Affiliation:
Radiocarbon Laboratory, University of Waikato, PB 3105, Hamilton 3240, New Zealand.
Christopher Bronk Ramsey
Affiliation:
Oxford Radiocarbon Accelerator Unit, Research Lab for Archaeology, Dyson Perrins Building, South Parks Road, Oxford OX1 3QY, United Kingdom.
Chris Turney
Affiliation:
School of Geography, Archaeology and Earth Resources, University of Exeter, Exeter, Devon, EX4 4RJ, United Kingdom.
Jonathan Palmer
Affiliation:
Gondwana Tree-Ring Laboratory, P.O. Box 14, Little River, Canterbury 7546, New Zealand.
*
Corresponding author. Email: [email protected].
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Abstract

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While an interhemispheric offset in atmospheric radiocarbon levels from AD 1950–950 is now well established, its existence earlier in the Holocene is less clear, with some studies reporting globally uniform 14C levels while others finding Southern Hemisphere samples older by a few decades. In this paper, we present a method for wiggle-matching Southern Hemisphere data sets against Northern Hemisphere curves, using the Bayesian calibration program OxCal 4.1 with the Reservoir Offset function accommodating a potential interhemispheric offset. The accuracy and robustness of this approach is confirmed by wiggle-matching known-calendar age sequences of the Southern Hemisphere calibration curve SHCal04 against the Northern Hemisphere curve IntCal04. We also show that 5 of 9 Holocene Southern Hemisphere data sets are capable of yielding reliable offset information. Those data sets that are accurate and precise show that interhemispheric offset levels in the Early Holocene are similar to modern levels, confirming SHCal04 as the curve of choice for calibrating Southern Hemisphere samples.

Type
Articles
Information
Radiocarbon , Volume 51 , Issue 4 , 2009 , pp. 1165 - 1176
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona 

References

Barbetti, M, Bird, T, Dolezal, G, Taylor, G, Francey, R, Cook, E, Peterson, M. 1992. Radiocarbon variations from Tasmanian conifers: first results from late Pleistocene and Holocene logs. Radiocarbon 34(3):806–17.Google Scholar
Barbetti, M, Bird, T, Dolezal, G, Taylor, G, Francey, R, Cook, E, Peterson, M. 1995. Radiocarbon variations from Tasmanian conifers: results from three Holocene logs. Radiocarbon 37(2):361–9.Google Scholar
Barbetti, M, Hua, Q, Zoppi, U, Fink, D, Zhao, Y, Thomson, B. 2004. Radiocarbon variations from the Southern Hemisphere, 10,350–9700 cal BP. Nuclear Instruments and Methods in Physics Research B 223–224:366–70.CrossRefGoogle Scholar
Bronk Ramsey, C. 1995. Radiocarbon calibration and analysis of stratigraphy: the OxCal program. Radiocarbon 37(2):425–30.Google Scholar
Bronk Ramsey, C. 2001. Development of the radiocarbon calibration program. Radiocarbon 43(2A):355–63.CrossRefGoogle Scholar
Bronk Ramsey, C. 2009a. Bayesian analysis of radiocarbon dates. Radiocarbon 51(1):337–60.Google Scholar
Bronk Ramsey, C. 2009b. Dealing with outliers and offsets in radiocarbon dating. Radiocarbon 51(3):1023–45.Google Scholar
Bronk Ramsey, C, van der Plicht, J, Weninger, B. 2001. ‘Wiggle matching’ radiocarbon dates. Radiocarbon 43(2A):381–9.Google Scholar
Hogg, AG, McCormac, FG, Higham, TFG, Baillie, MGL, Palmer, JG. 2002. High-precision radiocarbon measurements of contemporaneous tree-ring dated wood from the British Isles and New Zealand: AD 1850–950. Radiocarbon 44(3):633–40.CrossRefGoogle Scholar
Kromer, B, Becker, B. 1993. German oak and pine calibration, 7200–9400 BC. Radiocarbon 35(1): 125–35.Google Scholar
Kromer, B, Spurk, M, Remmele, S, Barbetti, M. 1998. Segments of atmospheric 14C change as derived from late glacial and early Holocene floating tree-ring series. Radiocarbon 40(1):351–8.Google Scholar
McCormac, FG, Reimer, PJ, Hogg, AG, Higham, TFG, Baillie, MGL, Palmer, JG, Stuiver, M. 2002. Calibration of the radiocarbon time scale for the Southern Hemisphere AD 1850–950. Radiocarbon 44(3):641–51.Google Scholar
McCormac, G, Hogg, A, Blackwell, P, Buck, C, Higham, T, Reimer, P. 2004. SHCal04 Southern Hemisphere calibration, 0–11.0 cal kyr BP. Radiocarbon 46(3): 1087–92.Google Scholar
Palmer, JG, Ogden, J, Patel, RN. 1988. A 426-year floating tree-ring chronology from Phyllocladus trichomanoides buried by the Taupo eruption at Pureora, central North Island, New Zealand. Journal of the Royal Society of New Zealand 19(4):407–15.Google Scholar
Reimer, PJ, Baillie, MGL, Bard, E, Bayliss, A, Beck, JW, Bertrand, CJH, Blackwell, PG, Buck, CE, Burr, GS, Cutler, KB, Damon, PE, Edwards, RL, Fairbanks, RG, Friedrich, M, Guilderson, TP, Hogg, AG, Hughen, KA, Kromer, B, McCormac, G, Manning, S, Bronk Ramsey, C, Reimer, RW, Remmele, S, Southon, JR, Stuiver, M, Talamo, S, Taylor, FW, van der Plicht, J, Weyhenmeyer, CE. 2004. IntCal04 terrestrial radiocarbon age calibration, 0–26 cal kyr BP. Radiocarbon 46(3):1029–58.Google Scholar
Sparks, RJ, Melhuish, WH, McKee, JWA, Ogden, J, Palmer, JG, Molloy, BPJ. 1995. 14C calibration in the Southern Hemisphere and the date of the last Taupo eruption: evidence from tree-ring sequences. Radiocarbon 37(2):155–63.Google Scholar
Stuiver, M, Becker, B. 1993. High-precision decadal calibration of the radiocarbon timescale, AD 1950–6000 BC. Radiocarbon 35(1):35–65.CrossRefGoogle Scholar