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Water isotopic measurements of the basal ice layers of the 1966 Camp Century ice core (Greenland)

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Bibliographic Details
Title: Water isotopic measurements of the basal ice layers of the 1966 Camp Century ice core (Greenland)
Authors: Ardoin, Lisa, Gkinis, Vasileios, Fripiat, François, Tison, Jean-Louis, Dahl-Jensen, Dorthe, Steffensen, Jørgen Peder
Publisher Information: PANGAEA
Publication Year: 2025
Collection: PANGAEA - Data Publisher for Earth & Environmental Science (AWI Bremerhaven / MARUM Bremen)
Subject Terms: Bag number, basal ice, Cavity ring-down spectroscopy (CRDS), isotopic water analyzer, Picarro Inc., L2140-i, coupled with A0212 vaporiser, Depth, bottom/max, sediment/rock, bottom/maximum, top/minimum, top/min, Greenland, Ice core, MULT, Multiple investigations, water isotopes, Δδ Deuterium, δ17O, δ18O
Subject Geographic: LATITUDE: 77.166000 * LONGITUDE: -61.133000
Time: Camp_Century
Description: The dataset comprises discrete water isotopic measurements of the last 27m of the Camp Century ice core that was drilled in 1966. Samples from 5 to 10 g of Camp Century ice were collected at intervals of 40 cm, with a refined sampling resolution in the lower 2 m, where intervals were reduced to approximately 15 cm. The samples were melted at ambient temperature and filtered with 2 µm polyether sulfone filters before analyses to remove the debris. The water isotopes measurements were performed at the Centre for Ice and Climate, Niels Bohr Institute (Copenhagen, Denmark) in 2023 using a cavity ring-down spectrometer. Measurements are referenced to Vienna Standard Mean Ocean Water (VSMOW) using two in-house standards waters, bracketing the sample δ17O, δ18O and δD values (i.e., δ17O (‰) = (17O/16O)sample/(17O/16O)SMOW - 1; δ18O (‰) = (18O/16O)sample/(18O/16O)SMOW - 1; δD (‰) = (D/H)sample/(D/H)SMOW - 1). Standard deviation (SD) was calculated using internal standards during each batch of measurements, as well as by performing triplicate analysis for each sample. For our dataset, we report median 1 SD reproducibility of 0.04 ‰, 0.04 ‰ and 0.35 ‰ for δ18O, δ17O and δD respectively.
Document Type: dataset
File Description: text/tab-separated-values, 664 data points
Language: English
Relation: Bierman, Paul R; Christ, Andrew J; Collins, Catherine M; Mastro, Halley M; Souza, Juliana; Blard, Pierre-Henri; Brachfeld, Stefanie A; Courville, Zoe R; Rittenour, Tammy M; Thomas, Elizabeth K; Tison, Jean-Louis; Fripiat, François (2024): Scientific history, sampling approach, and physical characterization of the Camp Century subglacial material, a rare archive from beneath the Greenland Ice Sheet. The Cryosphere, 18(9), 4029-4052, https://doi.org/10.5194/tc-18-4029-2024; Herron, Susan; Langway, Chester C Jr (1979): The Debris-Laden Ice at the Bottom of the Greenland Ice Sheet. Journal of Glaciology, 23(89), 193-207, https://doi.org/10.3189/S002214300002983X; https://doi.pangaea.de/10.1594/PANGAEA.983903; https://doi.org/10.1594/PANGAEA.983903
DOI: 10.1594/PANGAEA.983903
Availability: https://doi.pangaea.de/10.1594/PANGAEA.983903
https://doi.org/10.1594/PANGAEA.983903
Rights: CC-BY-4.0: Creative Commons Attribution 4.0 International ; Access constraints: unrestricted ; info:eu-repo/semantics/openAccess
Accession Number: edsbas.3C4ECE28
Database: BASE
Description
Abstract:The dataset comprises discrete water isotopic measurements of the last 27m of the Camp Century ice core that was drilled in 1966. Samples from 5 to 10 g of Camp Century ice were collected at intervals of 40 cm, with a refined sampling resolution in the lower 2 m, where intervals were reduced to approximately 15 cm. The samples were melted at ambient temperature and filtered with 2 µm polyether sulfone filters before analyses to remove the debris. The water isotopes measurements were performed at the Centre for Ice and Climate, Niels Bohr Institute (Copenhagen, Denmark) in 2023 using a cavity ring-down spectrometer. Measurements are referenced to Vienna Standard Mean Ocean Water (VSMOW) using two in-house standards waters, bracketing the sample δ17O, δ18O and δD values (i.e., δ17O (‰) = (17O/16O)sample/(17O/16O)SMOW - 1; δ18O (‰) = (18O/16O)sample/(18O/16O)SMOW - 1; δD (‰) = (D/H)sample/(D/H)SMOW - 1). Standard deviation (SD) was calculated using internal standards during each batch of measurements, as well as by performing triplicate analysis for each sample. For our dataset, we report median 1 SD reproducibility of 0.04 ‰, 0.04 ‰ and 0.35 ‰ for δ18O, δ17O and δD respectively.
DOI:10.1594/PANGAEA.983903