AN INTERCOMPARISON PROJECT on 14C from SINGLE-YEAR TREE RINGS

Sabrina G.K. Kudsk, Jesper Olsen, Gregory W.L. Hodgins, Mihály Molnár, Todd E. Lange, Jessica A. Nordby, A. J.Timothy Jull, Tamás Varga, Christoffer Karoff, Mads F. Knudsen

Research output: Contribution to journalArticlepeer-review

Abstract

A laboratory intercomparison project was carried out on 20 annually resolved late-wood samples from the Danish oak record. The project included the following three laboratories: (1) the University of Arizona AMS Laboratory, University of Arizona, USA (AA); (2) HEKAL AMS Laboratory, MTA Atomki, Hungary (DeA); and (3) Aarhus AMS Centre (AARAMS), Aarhus University, Denmark (AAR). The large majority of individual data points (96%) lie within ±2σ of the weighted mean. Further assessment of the accuracy associated with the individual laboratories showed good agreement, indicating that consistent and reliable 14C measurements well in agreement with each other are produced at the three laboratories. However, the quoted analytical uncertainties appear to be underestimated when compared to the observed variance of differences from the geometric mean of the samples. This study provides a general quality check of the single-year tree-ring 14C measurements that are included in the new calibration curve.

Original languageEnglish (US)
Pages (from-to)1445-1452
Number of pages8
JournalRadiocarbon
Volume63
Issue number5
DOIs
StatePublished - Oct 7 2021

Keywords

  • IntCal
  • intercomparison
  • radiocarbon dating
  • single-year measurement
  • tree ring

ASJC Scopus subject areas

  • Archaeology
  • Earth and Planetary Sciences(all)

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