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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: SHCAL20 Southern Hemisphere calibration, 0-55,000 years cal BP
Author(s): Hogg, Alan G
Heaton, Timothy J
Hua, Quan
Palmer, Jonathan G
Turney, Christian S M
Southon, John
Bayliss, Alex
Blackwell, Paul G
Goswijk, Gretel
Bronk Ramsey, Christopher
Pearson, Charlotte
Petchey, Fiona
Reimer, Paula
Reimer, Ron
Wacker, Lukas
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Keywords: carbon cycle
Inter-Tropical Convergence Zone (ITCZ)
interhemispheric gradient (IHG)
North-South hemispheric offset
Southern Ocean
tropical and sub-tropical radiocarbon calibration
Issue Date: 12-Aug-2020
Citation: Hogg AG, Heaton TJ, Hua Q, Palmer JG, Turney CSM, Southon J, Bayliss A, Blackwell PG, Goswijk G, Bronk Ramsey C, Pearson C, Petchey F, Reimer P, Reimer R & Wacker L (2020) SHCAL20 Southern Hemisphere calibration, 0-55,000 years cal BP. Radiocarbon.
Abstract: Early researchers of radiocarbon levels in South Hemisphere tree rings identified a variable North-South hemispheric offset, necessitating construction of a separate radiocarbon calibration curve for the Southern Hemisphere. We present here SHCal20, a revised calibration curve from 0-55,000 cal BP, based upon SHCal13 and fortified by the addition of fourteen new tree-ring data sets in the 2140-0, 3520-3450, 3605-3590 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 a 50%:50% mixed curve 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 contemporary Northern Hemisphere data, we estimate the mean North-South offset to be 36 ± 27 14C yr.
DOI Link: 10.1017/RDC.2020.59
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 (, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Notes: Output Status: Forthcoming/Available Online
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