Kaufman, Darrell S (2025): Radiocarbon ages for sediment core EN22502 from Salmon Lake, Alaska [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983998
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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. 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 (doi:10.1594/PANGAEA.984002) 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): Depth versus age for sediment core EN22502 from Salmon Lake, Alaska [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984002
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: 0.115 m * Maximum DEPTH, sediment/rock: 15.585 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:
Approximately 1 - 4 cm^3 of sediment were soaked in reagent-grade water and sieved at 150 µm to concentrate macrofossils. Plant and other macrofossils were picked under a light microscope. Most samples comprised a mix of terrestrial, aquatic and many unidentifiable plant fragments. Samples were pre-treated using weak acid.
Samples were analyzed using the gas ion source interface of the MICADAS at the Northern Arizona University Arizona Climate and Ecosystems (ACE) Isotope Laboratory.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Laboratory code/label | Lab label | Kaufman, Darrell S | Arizona Climate & Ecosystem (ACE) Isotope Laboratory identification number | ||
| 2 | Sample ID | Sample ID | Kaufman, Darrell S | Sample identifier based on core name and tube depth range in cm | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Kaufman, Darrell S | Geocode – Depth below lake floor (blf) | |
| 4 | Age, dated | Age dated | ka BP | Kaufman, Darrell S | Accelerator mass spectrometry (AMS), Ionplus, MiCaDaS | Radiocarbon age in years before 1950 CE |
| 5 | Age, dated, standard deviation | Age dated std dev | ± | Kaufman, Darrell S | Accelerator mass spectrometry (AMS), Ionplus, MiCaDaS | 1 sigma age uncertainty (ka) |
| 6 | Age, dated material | Dated material | Kaufman, Darrell S | Description of material used for 14C measurement |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
245 data points
Data
| 1 Lab label | 2 Sample ID | 3 Depth sed [m] | 4 Age dated [ka BP] | 5 Age dated std dev [±] | 6 Dated material |
|---|---|---|---|---|---|
| 8394.1.1 | EN22502-2 14-16 cm | 0.115 | 0.362 | 0.065 | 12 leaf, 2 moss , 15 unidentified plant |
| 8395.1.1 | EN22502-2 38-40 cm | 0.335 | 0.314 | 0.066 | 6 moss, 3 stem, 3 stem-like unidentified plant |
| 8396.1.1 | EN22502-3 64-66 cm | 0.625 | 1.418 | 0.070 | ~ 150 unidentified plant |
| 8397.1.1 | EN22502-3 100-102 cm | 0.985 | 1.294 | 0.071 | 18 moss, 30 leaf |
| 8772.1.1 | EN22502-3 124-126 cm | 1.225 | 2.168 | 0.063 | 6 moss, 14 chitin, 3 vascular leaf , dozens of unidentified plant |
| 8773.1.1 | EN22502-4 4-6 cm | 1.535 | 2.388 | 0.059 | 7 moss, 35 vascular leaf, 15 chitin, ~100 unidentified plant |
| 8774.1.1 | EN22502-4 28-30 cm | 1.775 | 2.701 | 0.060 | 4 moss, 1 twig, 15 vascular leaf, ~ 100 unidentified plant |
| 8775.1.1 | EN22502-4 44-46 cm | 1.935 | 3.175 | 0.062 | 10 moss, 2 vascular leaf, ~ 80 unidentified plant |
| 8398.1.1 | EN22502-4 60-62 cm | 2.095 | 3.440 | 0.077 | 30 leaf, 1 moss, ~ 30 unidentified plant |
| 8399.1.1 | EN22502-4 160-162 cm | 3.095 | 3.522 | 0.081 | 1 moss bud, 10 leaf, 1 unidentified plant |
| 8776.1.1 | EN22502-5 6-8 cm | 3.545 | 4.369 | 0.064 | ~20 vascular leaf, ~ 80 unidentified plant |
| 8777.1.1 | EN22502-5 34-36 cm | 3.825 | 5.188 | 0.067 | 1 moss, 1 vascular leaf, ~ 50 unidentified plant |
| 8778.1.1 | EN22502-5 70-72 cm | 4.185 | 5.566 | 0.068 | ~20 vascular leaf, 9 chitin sphere, ~ 50 unidentified plant |
| 8400.1.1 | EN22502-5 82-84 cm | 4.305 | 5.923 | 0.092 | 3 moss stem, several moss leaf, ~80 unidentified plant |
| 8779.1.1 | EN22502-5 105-107 cm | 4.535 | 5.877 | 0.070 | 7 moss, 16 vascular leaf, ~ 80 unidentified plant |
| 8780.1.1 | EN22502-5 121-123 cm | 4.695 | 6.224 | 0.074 | ~ 50 vascular leaf, ~ 50 unidentified plant |
| 8781.1.1 | EN22502-5 149-151 cm | 4.975 | 6.411 | 0.072 | 1 moss, 12 vascular leaf, ~ 100 unidentified plant |
| 8782.1.1 | EN22502-5 177-179 cm | 5.255 | 6.859 | 0.074 | 7 moss, 4 vascular leaf |
| 8783.1.1 | EN22502-6 6-8 cm | 5.545 | 7.650 | 0.081 | 6 unidentified plant, 2 chitin sphere |
| 8796.1.1 | EN22502-6 22-24 cm | 5.705 | 8.151 | 0.080 | 2 moss, ~ 40 unidentified plant likely vascular leaf |
| 8797.1.1 | EN22502-6 42-44 cm | 5.905 | 8.148 | 0.080 | 1 moss, ~ 100 unidentified plant likely vascular leaf |
| 8798.1.1 | EN22502-6 62-64 cm | 6.105 | 9.525 | 0.090 | 5 chitinous sphere, 46 yellowish leaf, ~70 unidentified plant likely vascular leaf |
| 8799.1.1 | EN22502-6 102-104 cm | 6.505 | 8.924 | 0.094 | 2 chitinous sphere, 5 stems, 2 ephippia, ~60 unidentified plant likely vascular leaf |
| 8800.1.1 | EN22502-6 126-128 cm | 6.745 | 9.488 | 0.090 | 2 chitinous sphere, ~100 unidentified plant likely vascular leaf |
| 8801.1.1 | EN22502-6 162-164 cm | 7.105 | 10.675 | 0.102 | 3 chitinous sphere, 30 graminoid, 1 vascular leaf, ~60 unidentified plant likely vascular leaf |
| 8802.1.1 | EN22502-6 182-184 cm | 7.305 | 10.386 | 0.098 | 25 moss, 7 leaf, ~60 unidentified plant likely vascular leaf |
| 8803.1.1 | EN22502-7 36-38 cm | 7.845 | 10.890 | 0.101 | 39 vascular leaf, 15 moss |
| 8804.1.1 | EN22502-7 42-44 cm | 7.905 | 11.252 | 0.100 | 17 vascular leaf, 14 moss |
| 8806.1.1 | EN22502-7 48-50 cm | 7.965 | 11.426 | 0.108 | 2 vascular leaf |
| 8808.1.1 | EN22502-7 70-72 cm | 8.185 | 12.001 | 0.112 | ~200 leaf and stem |
| 8811.1.1 | EN22502-7 92-94 cm | 8.405 | 12.232 | 0.112 | 2 moss, ~ 100 leaf and stem |
| 8784.1.1 | EN22502-7 106-108 cm | 8.545 | 12.275 | 0.109 | 34 vascular leaf, 1 moss, 1 insect head chitin |
| 8785.1.1 | EN22502-7 134-136 cm | 8.825 | 12.649 | 0.111 | 5 moss, 7 vascular leaf |
| 8786.1.1 | EN22502-7 152-154 cm | 9.005 | 12.612 | 0.111 | 8 moss, 8 vascular leaf |
| 8787.1.1 | EN22502-7 174-176 cm | 9.225 | 12.845 | 0.112 | 8 moss, ~ 200 leaf and stem |
| 8788.1.1 | EN22502-8 24-26 cm | 9.725 | 13.903 | 0.128 | 13 moss, 8 vascular leaf |
| 8789.1.1 | EN22502-8 44-46 cm | 9.925 | 14.165 | 0.128 | 8 moss, 10 vascular leaf |
| 8790.1.1 | EN22502-8 68-70 cm | 10.165 | 14.514 | 0.124 | 13 moss |
| 8791.1.1 | EN22502-8 74-76 cm | 10.225 | 14.769 | 0.138 | 3 wood |
| 8792.1.1 | EN22502-8 130-132 cm | 10.785 | 15.677 | 0.147 | 15 moss, 1 vascular leaf |
| 8805.1.1 | EN22502-8 148-150 cm | 10.965 | 15.653 | 0.139 | 1 moss, 1 chitin sphere, ~ 60 unidentified plant |
| 8793.1.1 | EN22502-9 26-28 cm | 11.750 | 17.597 | 0.160 | 2 moss, 2 chitin sphere, ~80 unidentified plant |
| 8807.1.1 | EN22502-9 42-44 cm | 11.910 | 17.871 | 0.173 | 2 moss, 1 chitin sphere, ~ 80 unidentified plant |
| 8794.1.1 | EN22502-9 68-70 cm | 12.170 | 18.241 | 0.168 | 5 moss, ~ 60 vascular leaf, 2 chitin sphere |
| 8809.1.1 | EN22502-9 108-110 cm | 12.570 | 18.389 | 0.182 | 40 moss leaf cluster |
| 8810.1.1 | EN22502-10 32-34 cm | 13.810 | 19.409 | 0.196 | ~ 100 unidentified plant, 1 insect head chitin |
| 8795.1.1 | EN22502-10 44-46 cm | 13.930 | 20.733 | 0.212 | 1 moss, ~60 vascular leaf |
| 8812.1.1 | EN22502-10 68-70 cm | 14.170 | 20.460 | 0.214 | ~ 100 unidentified plant, 1 chitin sphere |
| 8813.1.1 | EN22502-11 34-36 cm | 15.585 | 23.845 | 0.281 | 2 moss leaf cluster, ~ 200 unidentified plant |