Walcott-George, Caleb K; Brown, Nathan; Briner, Jason P; Balter-Kennedy, Allie; Young, Nicolás E; Kuhl, Tanner W; Moravec, Elliot; Anandakrishnan, Sridhar; Stevens, Nathan; Keisling, Benjamin A; DeConto, Robert M; Gkinis, Vasileios; MacGregor, Joseph A; Schaefer, Joerg: Luminescence dating results from the 2023 ASIG sediment core, Prudhoe Dome, Greenland [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987381 (dataset in review)
Abstract:
We drilled through 509 m of firn and ice at Prudhoe Dome , northwest Greenland to obtain sub-ice material yielding direct evidence for the response of the northwestern Greenland Ice Sheet to Holocene warmth. We collected ~3 m of sediment above ~4.4 m of bedrock between 6-6-2023 and 6-7-2023 using the ASIG drill operated by the United States National Science Foundation Ice Drilling Program. We measured luminescence signals from K-feldspars (150-200 micron fraction) at select depths within the sediment column at the University of Texas at Arlington Luminescence Laboratory using single-grain post-infrared infrared stimulated luminescence measured at 225℃ (p-IR IRSL225) measured on a Risø DA-20 luminescence reader. Our dataset contains estimates of equivalent dose (De) from a Minimum Age-3 Model (MAM-3) assuming a 15% overdispersion, the necessary DRAC (Dose Rate Age Calculator; Durcan et al., 2015) input information to calculate dose rates, and our calculated ages. We sent aliquots (1-10 g) of material from four depth intervals, 0-7.5 cm, 8.0–11.2 cm, 81.5–88.0 cm, and 173.3–177.8 cm, for XRF and ICP-MS measurements of radionuclides at SGS Canada (0-7.5 cm) or the Washington State University Peter Hooper GeoAnalytical Lab (8.0–11.2 cm, 81.5–88.0 cm, and 173.3–177.8 cm). We measured water content by measuring the mass of samples before melting and again after melting and after drying sediments in a 50 ℃ oven overnight. Our data record the last time sediments under Prudhoe Dome were exposed to sunlight, necessitating that Prudhoe Dome was absent from our site.
References:
Durcan, J. A., King, G. E., and Duller, G. A. T.: DRAC: Dose Rate and Age Calculator for trapped charge dating, Quaternary Geochronology, 28, 54-61, https://doi.org/10.1016/j.quageo.2015.03.012, 2015.).
Supplement to:
Walcott-George, Caleb K; Brown, Nathan; Briner, Jason P; Balter-Kennedy, Allie; Young, Nicolás E; Kuhl, Tanner W; Moravec, Elliot; Anandakrishnan, Sridhar; Stevens, Nathan; Keisling, Benjamin A; DeConto, Robert M; Gkinis, Vasileios; MacGregor, Joseph A; Schaefer, Joerg (2026): Deglaciation of the Prudhoe Dome in northwestern Greenland in response to Holocene warming. Nature Geoscience, https://doi.org/10.1038/s41561-025-01889-9
References:
Durcan, Julie A; King, Georgina; Duller, G A T (2015): DRAC: Dose Rate and Age Calculator for trapped charge dating. Quaternary Geochronology, 28, 54-61, https://doi.org/10.1016/j.quageo.2015.03.012
Funding:
National Science Foundation (NSF), grant/award no. 1933802: GreenDrill: The response of the northern Greenland Ice Sheet to Arctic Warmth - Direct constrains from sub-ice bedrock
National Science Foundation (NSF), grant/award no. 1933927: GreenDrill: The response of the northern Greenland Ice Sheet to Arctic Warmth - Direct constrains from sub-ice bedrock
National Science Foundation (NSF), grant/award no. 1933938: GreenDrill: The response of the northern Greenland Ice Sheet to Arctic Warmth - Direct constrains from sub-ice bedrock
National Science Foundation (NSF), grant/award no. 1934477: GreenDrill: The response of the northern Greenland Ice Sheet to Arctic Warmth - Direct constrains from sub-ice bedrock
Coverage:
Latitude: 78.109844 * Longitude: -70.808691
Date/Time Start: 2023-06-06T00:00:00 * Date/Time End: 2023-06-07T00:00:00
Minimum Elevation: 1284.0 m * Maximum Elevation: 1284.0 m
Event(s):
23PDA-01 (2023 Prudhoe Dome ASIG) * Latitude Start: 78.109844 * Longitude Start: -70.808691 * Latitude End: 78.109844 * Longitude End: -70.808691 * Date/Time Start: 2023-06-06T00:00:00 * Date/Time End: 2023-06-07T00:00:00 * Elevation Start: 1284.0 m * Elevation End: 1284.0 m * Location: Prudhoe Dome, Greenland * Method/Device: Agile Sub-Ice Geological Drill (ASIG)
Comment:
Dose Rate and Age calculator (DRAC) input: https://www.aber.ac.uk/en/dges/research/quaternary/luminescence-research-laboratory/dose-rate-calculator/
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Walcott-George, Caleb K | Geocode | |
| 2 | Depth, ice/snow, top/minimum | Depth ice/snow top | m | Walcott-George, Caleb K | ||
| 3 | Depth, ice/snow, bottom/maximum | Depth ice/snow bot | m | Walcott-George, Caleb K | ||
| 4 | Comment | Comment | Walcott-George, Caleb K | |||
| 5 | Grains | Grains | # | Walcott-George, Caleb K | Luminescence reader, Risø, DA-20; pIRIR-225 | analyzed |
| 6 | Grains | Grains | # | Walcott-George, Caleb K | Luminescence reader, Risø, DA-20; pIRIR-225 | saturated |
| 7 | Grains | Grains | # | Walcott-George, Caleb K | Luminescence reader, Risø, DA-20; pIRIR-225 | accepted |
| 8 | Equivalent dose | De | Gy | Walcott-George, Caleb K | Luminescence reader, Risø, DA-20; pIRIR-225 | Minimum Age Model -3, De |
| 9 | Equivalent dose, standard deviation | De std dev | ± | Walcott-George, Caleb K | Minimum Age Model -3, De 1 sigma | |
| 10 | Project | Project | Walcott-George, Caleb K | DRACProject ID | ||
| 11 | Sample ID | Sample ID | Walcott-George, Caleb K | DRACSample ID | ||
| 12 | Minerals | Minerals | Walcott-George, Caleb K | DRACMineral | ||
| 13 | Reference/source | Reference | Walcott-George, Caleb K | DRACConversion factors | ||
| 14 | Uranium | U | mg/kg | Walcott-George, Caleb K | ICP-MS | DRACExternal, original given in ppm |
| 15 | Uranium, standard deviation | U std dev | ± | Walcott-George, Caleb K | ICP-MS | DRACerrExternal |
| 16 | Thorium | Th | mg/kg | Walcott-George, Caleb K | ICP-MS | DRACExternal, original given in ppm |
| 17 | Thorium, standard deviation | Th std dev | ± | Walcott-George, Caleb K | ICP-MS | DRACerrExternal |
| 18 | Potassium | K | mg/kg | Walcott-George, Caleb K | ICP-MS | DRACExternal K, original given in ppm |
| 19 | Potassium, standard deviation | K std dev | ± | Walcott-George, Caleb K | ICP-MS | DRACerrExternal |
| 20 | Rubidium | Rb | mg/kg | Walcott-George, Caleb K | ICP-MS | DRACExternal Rb, original given in ppm |
| 21 | Rubidium, standard deviation | Rb std dev | ± | Walcott-George, Caleb K | ICP-MS | DRACerrExternal |
| 22 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACCalculate external Rb from K conc? | ||
| 23 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | ICP-MS | DRACInternal U (ppm) | |
| 24 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrInternal U (ppm) | ||
| 25 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACInternal Th (ppm) | ||
| 26 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrInternal Th (ppm) | ||
| 27 | Potassium | K | % | Walcott-George, Caleb K | X-ray fluorescence (XRF) | Internal |
| 28 | Potassium, standard deviation | K std dev | ± | Walcott-George, Caleb K | X-ray fluorescence (XRF) | Internal |
| 29 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | ICP-MS | DRACInternal Rb (ppm) | |
| 30 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | ICP-MS | DRACerrInternal Rb (ppm) | |
| 31 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | Calculate internal Rb from K conc? | ||
| 32 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACUser external alphadoserate (Gy.ka-1) | ||
| 33 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrUser external alphadoserate (Gy.ka-1) | ||
| 34 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACUser external betadoserate (Gy.ka-1) | ||
| 35 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrUser external betadoserate (Gy.ka-1) | ||
| 36 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACUser external gamma doserate (Gy.ka-1) | ||
| 37 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrUser external gammadoserate (Gy.ka-1) | ||
| 38 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACUser internal doserate (Gy.ka-1) | ||
| 39 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrUser internal doserate (Gy.ka-1) | ||
| 40 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACScale gammadoserate at shallow depths? | ||
| 41 | Grain size, minimum | Grain size min | µm | Walcott-George, Caleb K | ||
| 42 | Grain size, maximum | Grain size max | µm | Walcott-George, Caleb K | ||
| 43 | Reference/source | Reference | Walcott-George, Caleb K | DRACalpha-Grain size attenuation | ||
| 44 | Reference/source | Reference | Walcott-George, Caleb K | DRACbeta-Grain size attenuation | ||
| 45 | Technical depth, minimum | Tch depth min | µm | Walcott-George, Caleb K | ||
| 46 | Technical depth, maximum | Tch depth max | µm | Walcott-George, Caleb K | ||
| 47 | Reference/source | Reference | Walcott-George, Caleb K | DRACbeta-Etch depth attenuation factor | ||
| 48 | a-value | a-value | Walcott-George, Caleb K | |||
| 49 | a-value, standard deviation | a-value std dev | ± | Walcott-George, Caleb K | ||
| 50 | Water content, wet mass | Water wm | % | Walcott-George, Caleb K | DRACWater content ((wet weight - dry weight)/dry weight) % | |
| 51 | Water content, standard deviation | Water std dev | ± | Walcott-George, Caleb K | ||
| 52 | Depth, reference | Depth ref | m | Walcott-George, Caleb K | DRACDepth | |
| 53 | Depth, sediment/rock, standard deviation | Depth sed std dev | ± | Walcott-George, Caleb K | DRACerrDepth | |
| 54 | Density | Density | g/cm3 | Walcott-George, Caleb K | DRACOverburden density | |
| 55 | Density, standard deviation | Density std dev | ± | Walcott-George, Caleb K | DRACOverburden density | |
| 56 | Latitude 2 | Latitude 2 | Walcott-George, Caleb K | DRAC | ||
| 57 | Longitude 2 | Longitude 2 | Walcott-George, Caleb K | DRAC | ||
| 58 | ALTITUDE | Altitude | m | Walcott-George, Caleb K | Geocode – DRAC | |
| 59 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACUser cosmicdoserate (Gy.ka-1) | ||
| 60 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrUser cosmicdoserate (Gy.ka-1) | ||
| 61 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACDe (Gy) | ||
| 62 | Calculated (yes/no) | Calculated (yes/no) | Walcott-George, Caleb K | DRACerrDe (Gy) | ||
| 63 | Dose rate, sediment | D sed | Gy/ka | Walcott-George, Caleb K | mean depth-adjusted dose rate* | |
| 64 | Dose rate, sediment, error | D sed e | ± | Walcott-George, Caleb K | depth-adhusted dose rate error | |
| 65 | Age, dated | Age dated | ka | Walcott-George, Caleb K | burial | |
| 66 | Age, dated, standard deviation | Age dated std dev | ± | Walcott-George, Caleb K | burial |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
216 data points