2020
DOI: 10.1017/rdc.2020.68
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Marine20—The Marine Radiocarbon Age Calibration Curve (0–55,000 cal BP)

Abstract: The concentration of radiocarbon (14C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14C in the marine environment therefore need a marine-specific calibration curve and cannot be calibrated directly against the atmospheric-based IntCal20 curve. This paper presents Marine20, an update to the internationally agreed marine radiocarbon age calibration curve that provides a non-polar global-average marine record of radiocarbon from 0–55 cal kBP and serves as a b… Show more

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Cited by 1,169 publications
(789 citation statements)
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References 81 publications
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“…2). The distinct overlap of a bulk and the macro-particle age and bulk and charcoal ages confirm the reservoir correction and application of the Marine20 calibration curve (Heaton et al, 2020) for bulk samples in Unit A. The only exception are the bulk 14 C-ages at 11.19 and 5.66 m sediment depth, which are too young for their stratigraphic position.…”
Section: Chronostratigraphysupporting
confidence: 54%
See 1 more Smart Citation
“…2). The distinct overlap of a bulk and the macro-particle age and bulk and charcoal ages confirm the reservoir correction and application of the Marine20 calibration curve (Heaton et al, 2020) for bulk samples in Unit A. The only exception are the bulk 14 C-ages at 11.19 and 5.66 m sediment depth, which are too young for their stratigraphic position.…”
Section: Chronostratigraphysupporting
confidence: 54%
“…For the final age-depth modelling, all aforementioned results were used. Bulk organic and n-alkane 14 C-ages from the terrestrial part of the sediment core were calibrated with the SHcal20 data calibration curve (Hogg et al, 2020), whereas 14 C-ages from the marine part of the record were calibrated with the Marine20 calibration curve (Heaton et al, 2020) and additionally corrected for a marine reservoir effect using a ΔR of 134 ± 38 14 C yrs as previously reported by Wündsch et al (2016b) ( Table 1). For the compound-class n-alkane samples, the SHCal20 calibration curve (Hogg et al, 2020) was applied due to a predominance of terrestrial synthesized long-chain n-alkanes (C29, C31, C33) in the samples (cf., section 4.3; Table 1).…”
Section: Age Modellingmentioning
confidence: 99%
“…Hard-water effects on the 14 C ages, which could make age determinations erroneously old, are unlikely in our study area because lake catchments are dominated by Archean gneiss, and the study lakes are all well above local marine limits. All new radiocarbon ages are calibrated using CALIB 8.2 and the INTCAL20 dataset, and previously reported radiocarbon ages are re-calibrated in the same manner using the INTCAL20 and MARINE20 datasets (Stuiver et al, 2020;Heaton et al, 2020; Table S1; Table S7).…”
Section: Traditional 14 C Ages From Proglacial Threshold Lakesmentioning
confidence: 99%
“…Including such covariance is likely to require modifications to current calibration software. These realizations, with their covariance information, have however already been used in the creation of Marine20 (Heaton et al 2020 in this issue) to rigorously propagate our atmospheric uncertainties through to the marine calibration curve.…”
Section: Conclusion and Further Workmentioning
confidence: 99%
“…Finally, we discuss potential future work in Section 6 along with areas we have identified for further improvement for the next IntCal iteration. Note that the statistical approaches to the creation of SHCal20 (Hogg et al 2020 in this issue) and Marine20 (Heaton et al 2020 in this issue) are presented within those papers and not discussed in detail here.…”
Section: Introductionmentioning
confidence: 99%