Kaufman, Darrell S (2025): Depth versus age for sediment core EN22502 from Salmon Lake, Alaska [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984002
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Published: 2025-08-04 • DOI registered: 2025-08-04
Abstract:
Radiocarbon (14C) ages were measured on 49 samples of macrofossils extracted from a sediment core extending back to roughly 30,000 calendar years before present (cal yr BP) from Salmon Lake, on Seward Peninsula, northwest Alaska (doi:10.1594/PANGAEA.983998). The 16.7-m-long core was collected in August 2022 by the Alfred Wegener Institute, Potsdam, Germany in collaboration with Northern Arizona University (NAU), Flagstaff, USA. The 14C ages were combined with age constrains from short-lived isotopes to generate an age-depth model for the core using rBacon software. It serves as the timeline for sediment samples from the core, which have been used for a large suite of biological, geochemical and physical analyses.
Related to:
Kaufman, Darrell S (2025): Radiocarbon ages for sediment core EN22502 from Salmon Lake, Alaska [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983998
References:
Blaauw, Maarten; Christen, Andrés (2011): Flexible paleoclimate age-depth models using an autoregressive gamma process. Bayesian Analysis, 6(3), 457-474, https://doi.org/10.1214/11-BA618
Related code / software:
Blaauw, Maarten; Christen, Andrés; Aquino-Lopez, Marco A; Esquivel-Vazquez, Judith; Gonzalez V, Oscar M; Belding, Ted; Theiler, James; Gough, Brian; Karney, Charles (2021): Package rbacon. CRAN, https://CRAN.R-project.org/package=rbacon
Funding:
National Science Foundation (NSF), grant/award no. 2303462: Paleo Records Of GLacier And Climate changes Inferred from Alaskan Lakes (PROGLACIAL)
Coverage:
Latitude: 64.910210 * Longitude: -164.992230
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 16.690 m
Event(s):
EN22502 * Latitude: 64.910210 * Longitude: -164.992230 * Elevation: 208.0 m * Location: Salmon Lake, Seward Peninsula, Alaska, USA * Campaign: AK-Land_2022_SewardPeninsula (Alaska Seward 2022) * Basis: AWI Arctic Land Expedition * Method/Device: Sediment corer, UWITEC
Comment:
The age-depth model was generated using rBacon (Blaauw and Christen, 2011). In addition to the 49 radiocarbon ages, the age-depth model was constrained by the following:
* Age at surface: –72 ± 1 BP @ 0 cm blf
* Age at peak in Cs profile: –13 ± 4 BP @ 5.25 cm blf
* Age of lowest detectable Pb: 76 ± 12 BP @ 12.75 cm blf
* Instantaneous deposit (slump): 302 to 218 cm blf
* Instantaneous deposit (tephra): 927 to 926 cm blf
* Instantaneous deposit (tephra): 1531 to 1530 cm blf
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Kaufman, Darrell S | Geocode – Depth below lake floor (blf) | |
| 2 | Calendar age | Cal age | ka BP | Kaufman, Darrell S | Age, 14C calibrated, Bayesian model, rbacon | Median model age in calendar kiloyears before 1950 CE |
| 3 | Calendar age, minimum/young | Cal age min | ka BP | Kaufman, Darrell S | Age, 14C calibrated, Bayesian model, rbacon | Minimum of modelled 95% confidence interval in calendar kiloyears before 1950 CE |
| 4 | Calendar age, maximum/old | Cal age max | ka BP | Kaufman, Darrell S | Age, 14C calibrated, Bayesian model, rbacon | Maximum of modelled 95% confidence interval in calendar kiloyears before 1950 CE |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
10035 data points
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