Hogg, A.G., Heaton, T.J. orcid.org/0000-0002-9994-142X, Hua, Q. et al. (12 more authors) (2020) SHCal20 Southern Hemisphere Calibration, 0–55,000 Years cal BP. Radiocarbon, 62 (4). pp. 759-778. ISSN 0033-8222
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 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. |
Keywords: | carbon cycle; Inter-Tropical Convergence Zone (ITCZ); interhemispheric gradient (IHG); North-South hemispheric offset; Southern Ocean; tropical and sub-tropical radiocarbon calibration |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Funding Information: | Funder Grant number The Leverhulme Trust 83262 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Jun 2022 11:20 |
Last Modified: | 21 Jun 2022 11:20 |
Status: | Published |
Publisher: | Cambridge University Press (CUP) |
Refereed: | Yes |
Identification Number: | 10.1017/rdc.2020.59 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188236 |
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