Discussion: Reporting and Calibration of Post-Bomb 14 C Data

Paula J. Reimer; Thomas A. Brown; Ron Reimer

doi:10.1017/s0033822200033154

Cited by 906Archaeology and ancient environmental studiesRadioactive Decay and Measurement TechniquesGeology and Paleoclimatology Research

Discussion: Reporting and Calibration of Post-Bomb 14 C Data

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Paula J. Reimer, Thomas A. Brown, Ron Reimer·2004·Radiocarbon

DOI 10.1017/s0033822200033154

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Abstract

The definitive paper by Stuiver and Polach (1977) established the conventions for reporting of radiocarbon data for chronological and geophysical studies based on the radioactive decay of 14 C in the sample since the year of sample death or formation. Several ways of reporting 14 C activity levels relative to a standard were also established, but no specific instructions were given for reporting nuclear weapons-testing (post-bomb) 14 C levels in samples. Because the use of post-bomb 14 C is becoming more prevalent in forensics, biology, and geosciences, a convention needs to be adopted. We advocate the use of fraction modern with a new symbol F 14 C to prevent confusion with the previously used Fm, which may or may not have been fractionation-corrected. We also discuss the calibration of post-bomb 14 C samples and the available data sets and compilations, but do not give a recommendation for a particular data set.

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The 14C bomb peak is commonly found in most carbon reservoirs around the globe.
“This ' 14 C bomb peak' (Fig. 2) is commonly found in most carbon reservoirs around the globe (Reimer et al., 2004;Levin et al., 2008;Hua et al., 2013), it provides a high-resolution chronometer for current scientific use, and owing to a relatively long half-life (5730 a) it will in general be detectable as a 'spike' for ~50 000 years into the future.”
From When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal (2015) · cites this paper as Reimer et al., 2004
The Calibration of Post-Bomb 14C Data section (page unavailable) describes post-bomb records in the atmosphere, tree rings, other organic materials, and marine samples across hemispheric zones. It does not establish that the bomb peak is commonly found in most carbon reservoirs worldwide; it also notes regional variation, particularly in marine records. (LLM, conf=0.83)
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Authors: Reimer, P. J., Brown, T. A., & Reimer, R.
Affiliations: Queen's University Belfast (GB)
Lawrence Livermore National Laboratory (US)
ORCID: Paula J. Reimer
Thomas A. Brown
Ron Reimer
Venue: Radiocarbon
Publisher: Cambridge University Press (CUP)
Published: 2004
Volume: 46
Issue: 3
Pages: 1299-1304
ISSN: 0033-8222 (ISSN-L)
1945-5755
DOI: 10.1017/s0033822200033154
OpenAlex: W1820434448
Cited by: 906
References: 39
Citations by year: 2026: 52 · 2025: 64 · 2024: 64 · 2023: 72 · 2022: 63 · 2021: 74 · 2020: 51 · 2019: 58 · 2018: 57 · 2017: 50 · 2016: 45 · 2015: 32 · 2014: 39 · 2013: 50 · 2012: 24
FWCI: 7.00
Type: journal article
Language: en
Open access: bronze
doi.org
Licence: www.cambridge.org/core/terms (unspecified, 4582 d)
Locations: Radiocarbon (publishedVersion)
Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut) (acceptedVersion)
UA Campus Repository (The University of Arizona) (acceptedVersion)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
University of North Texas Digital Library (University of North Texas) (submittedVersion)
Research Portal (Queen's University Belfast) (submittedVersion, other-oa)
Funders: National Science Foundation (0407554)
U.S. Department of Energy (W-7405, -7405-ENG-48, W‐7405‐ENG‐48)
Lawrence Livermore National Laboratory (W-7405-ENG 48, -7405-Eng-48)
Topics: Physical Sciences › Earth and Planetary Sciences › Paleontology › Archaeology and ancient environmental studies
Physical Sciences › Physics and Astronomy › Radiation › Radioactive Decay and Measurement Techniques
Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
Keywords: radiocarbon dating, radiocarbon calibration, nuclear weapons testing

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Discussion: Reporting and Calibration of Post-Bomb 14 C Data

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