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      SHCal20 Southern Hemisphere Calibration, 0–55,000 Years cal BP

      Hogg, Alan G.; Heaton, Timothy J.; Hua, Quan; Palmer, Jonathan G.; Turney, Chris S.M.; Southon, John; Bayliss, Alex; Blackwell, Paul G.; Boswijk, Gretel; Bronk Ramsey, Christopher; Pearson, Chrlotte; Petchey, Fiona; Reimer, Paula; Reimer, Ron; Wacker, Lukas
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      shcal20_southern_hemisphere_calibration_055000_years_cal_bp (1).pdf
      Published version, 2.133Mb
      DOI
       10.1017/rdc.2020.59
      Link
       www.cambridge.org
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      Hogg, A. G., Heaton, T. J., Hua, Q., Palmer, J. G., Turney, C. S. M., Southon, J., … Wacker, L. (2020). SHCal20 Southern Hemisphere Calibration, 0–55,000 Years cal BP. Radiocarbon, 62(4), 759–778. https://doi.org/10.1017/rdc.2020.59
      Permanent Research Commons link: https://hdl.handle.net/10289/13862
      Abstract
      Early researchers of radiocarbon levels in Southern Hemisphere tree rings identified a variable North-South hemispheric offset, necessitating construction of a separate radiocarbon calibration curve for the South. We present here SHCal20, a revised calibration curve from 0–55,000 cal BP, based upon SHCal13 and fortified by the addition of 14 new tree-ring data sets in the 2140–0, 3520–3453, 3608–3590 and 13,140–11,375 cal BP time intervals. We detail the statistical approaches used for curve construction and present recommendations for the use of the Northern Hemisphere curve (IntCal20), the Southern Hemisphere curve (SHCal20) and suggest where application of an equal mixture of the curves might be more appropriate. Using our Bayesian spline with errors-in-variables methodology, and based upon a comparison of Southern Hemisphere tree-ring data compared with contemporaneous Northern Hemisphere data, we estimate the mean Southern Hemisphere offset to be 36 ± 27 ¹⁴C yrs older.
      Date
      2020
      Type
      Journal Article
      Publisher
      Cambridge University Press (CUP)
      Rights
      © 2020 by the Arizona Board of Regents on behalf of the University of Arizona

      This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
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