Updated Cariaco Basin14C Calibration Dataset from 0–60 cal kyr BP
Open accessAbstract
We present new updates to the calendar and radiocarbon (14 C) chronologies for the Cariaco Basin, Venezuela. Calendar ages were generated by tuning abrupt climate shifts in Cariaco Basin sediments to those in speleothems from Hulu Cave. After the original Cariaco-Hulu calendar age model was published, Hulu Cave δ 18 O records have been augmented with increased temporal resolution and a greater number of U/Th dates. These updated Hulu Cave records provide increased accuracy as well as precision in the final Cariaco calendar age model. The depth scale for the Ocean Drilling Program Site 1002D sediment core, the primary source of samples for 14 C dating, has been corrected to account for missing sediment from a core break, eliminating age-depth anomalies that afflicted the earlier calendar age models. Individual 14 C dates for the Cariaco Basin remain unchanged from previous papers, although detailed comparisons of the Cariaco calibration dataset to those from Hulu Cave and Lake Suigetsu suggest that the Cariaco marine reservoir age may have shifted systematically during the past. We describe these recent changes to the Cariaco datasets and provide the data in a comprehensive format that will facilitate use by the community.
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The estimated MRA using the LSG OGCM based approach was too high for Cariaco Basin data during the Younger Dryas (ca. 12.9-11.7 cal kBP, GS-1) and during Heinrich Stadial 1 (ca. 23-12.9 cal kBP, GS-2).
“The estimated MRA using the above LSG OGCM based approach was, however, seen to be too high for Cariaco Basin data during the Younger Dryas (ca. 12.9 -11.7 cal kBP) which corresponds to Greenland Stadial (GS-1), where it is known to be close to zero from the overlap with the tree rings”
From The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP) (2020) · cites this paper as Hughen and Heaton 2020 in this issue
The Marine Reservoir Age section reports that comparison with tree rings shows Cariaco MRA dropping to near zero at the Younger Dryas onset, while the Incorporating Cariaco Basin section says the LSG OGCM cannot reproduce that reduction and overestimates MRA magnitude and variability. The paper also reports an MRA decrease around Heinrich Event 1, but places it around 17,148–16,150 cal yr BP; it does not establish that the model estimate was too high throughout the claimed 23–12.9 cal kBP interval. The verbatim citing sentence itself makes only the Younger Dryas claim. (LLM, conf=0.84)
Experimental — accuracy not yet measuredA revision of the Cariaco Basin record tie-pointing and age-depth model has resulted in changes to the timescale used in IntCal13; the depth scale has been corrected and the timescale recalculated.
“A revision of the Cariaco Basin record tie-pointing and age-depth model has resulted in changes to the timescale used in IntCal13. The depth scale has been corrected as described in Hughen and Heaton (2020 in this issue) and the timescale recalculated.”
From The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP) (2020) · cites this paper as Hughen and Heaton 2020 in this issue
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- Authors
- Hughen, K. A., & Heaton, T. J.
- Affiliations
- Woods Hole Oceanographic Institution (US)
- University of Sheffield (GB)
- Corresponding author
- Hughen, Konrad A
- Venue
- Radiocarbon
- Publisher
- Cambridge University Press (CUP)
- Published
- 2020-08
- Volume
- 62
- Issue
- 4
- Pages
- 1001-1043
- ISSN
- 0033-8222 (ISSN-L)
- 1945-5755
- OpenAlex
- W3081307666
- Cited by
- 50
- References
- 37
- Citations by year
- 2026: 4 · 2025: 1 · 2024: 3 · 2023: 7 · 2022: 6 · 2021: 23 · 2020: 6
- FWCI
- 3.43
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Radiocarbon (publishedVersion, cc-by)
- White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
- Open Access Server of the Woods Hole Scientific Community (Woods Hole Scientific Community) (submittedVersion, cc-by)
- Funders
- National Science Foundation (1657191)
- Woods Hole Oceanographic Institution
- Leverhulme Trust (RF-2019-140\9)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Archaeology and ancient environmental studies
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Tree-ring climate responses
- Keywords
- Cariaco Basin, radiocarbon calibration, Hulu Cave, speleothems, abrupt climate change, marine reservoir age, age-depth model, Lake Suigetsu, Holocene, Last Glacial Maximum, paleoclimate
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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