Gkinis, Vasileios; Vinther, Bo Møllesøe; Cook, Eliza; Freitag, Johannes; Holme, Christian T; Hughes, Abigail G; Kipfstuhl, Sepp; Kjær, Helle Astrid; Maffrezzoli, Niccolò; Morris, Valerie; Popp, Trevor J; Rasmussen, Sune Olander; Simonsen, Marius Folden; Svensson, Anders M; Vallelonga, Paul T; Vaughn, Bruce H; White, James W C; Winstrup, Mai; Hansen, Steffen Bo (2024): An ultra-high resolution water isotope record (d18O, dD) from the Renland ice cap spanning 120,000 years of climate history [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.966693
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Published: 2024-08-01 • DOI registered: 2024-08-01
Abstract:
The RECAP ice core was drilled at the Renland ice cap (71.30°N, 26.72°W, 2315 m asl) in 2015 from the surface to bedrock at a final depth of 584 m. Due to its close proximity to the east Greenland coast the record provides us with climate information reflecting past changes at the margins of the Greenland Ice Sheet. Stable water isotope ratios in polar ice record hydrological cycle changes due to isotope fractionation processes, occurring during evaporation, transportation and condensation. Here we present ultra high resolution water isotope measurements (δ18O, δ2H) obtained with Infrared-Laser Spectroscopy coupled to a state-of-the-art continuous melting system for ice core analysis. The measurements are calibrated to the VSMOW-SCALE following a daily two-point calibration. We used well defined local water standards calibrated against the primary IAEA standard waters. Using the results from the repeated VSMOW-SLAP calibrations we deduce an accuracy level of 0.02 and 0.3 ‰ for δ18O, δ2H respectively. Using spectral methods we estimate the compound noise level of the measurements directly from the δ18O and δ2H signals to be 0.08 and 0.2 ‰ respectively. Gaps in the record are filled using an iterative Maximum Entropy Method interpolation algorithm by Fahlmann and Ulrych (1982). The age scale is based on a linear interpolation of the water isotope record on the RECAP GICC05modelext Time Scale (version 1/3-2018 - PANGAEA, https://doi.org/10.1594/PANGAEA.906108).
Keyword(s):
Related to:
Gkinis, Vasileios; Vinther, Bo Møllesøe; Morris, Valerie; Holme, Christian T; Vaughn, Bruce H; Hughes, Abigail G; White, James W C; Kjær, Helle Astrid; Maffezzoli, Niccolò; Simonsen, Marius Folden; Vallelonga, Paul T; Svensson, Anders M (2020): Water Isotope Ratios (O18/O16) from the Renland ice core covering 0-8ka b2k [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.919453
Hughes, Abigail G; Jones, Tyler R; Vinther, Bo Møllesøe; Gkinis, Vasileios; Stevens, Christopher Max; Morris, Valerie; Vaughn, Bruce H; Holme, Christian T; Markle, Bradley R; White, James W C (2020): High-frequency climate variability in the Holocene from a coastal-dome ice core in east-central Greenland. Climate of the Past, 16(4), 1369-1386, https://doi.org/10.5194/cp-16-1369-2020
References:
Fahlman, G G; Ulrych, T J (1982): A new method for estimating the power spectrum of gapped data. Monthly Notices of the Royal Astronomical Society, 199(1), 53-65, https://doi.org/10.1093/mnras/199.1.53
Gkinis, Vasileios; Popp, Trevor; Blunier, Thomas; Bigler, Matthias; Schüpbach, Simon; Kettner, E; Johnsen, Sigfús Jóhann (2011): Water isotopic ratios from a continuously melted ice core sample. Atmospheric Measurement Techniques, 4(11), 2531-2542, https://doi.org/10.5194/amt-4-2531-2011 (This introduces and describes the analytical technique for measuring stable water isotopes in ice cores using laser spectroscopy and Continuous Flow Analysis.)
Simonsen, Marius Folden; Baccolo, Giovanni; Blunier, Thomas; Borunda, Alejandra; Delmonte, Barbara; Frei, Robert; Goldstein, Steven L; Grinsted, Aslak; Kjær, Helle Astrid; Sowers, Todd A; Svensson, Anders M; Vinther, Bo Møllesøe; Vladimirova, Diana; Winckler, Gisela; Winstrup, Mai; Vallelonga, Paul T (2019): East Greenland ice core dust record reveals timing of Greenland ice sheet advance and retreat. Nature Communications, 10(1), https://doi.org/10.1038/s41467-019-12546-2
Simonsen, Marius Folden; Baccolo, Giovanni; Blunier, Thomas; Borunda, Alejandra; Delmonte, Barbara; Frei, Robert; Goldstein, Steven L; Grinsted, Aslak; Kjær, Helle Astrid; Sowers, Todd A; Svensson, Anders M; Vinther, Bo Møllesøe; Vladimirova, Diana; Winckler, Gisela; Winstrup, Mai; Vallelonga, Paul T (2019): RECAP GICC05modelext Time Scale (version 1/3-2018) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.906108
Project(s):
Funding:
European Research Council (ERC), grant/award no. 610055: Arctic Sea Ice and Greenland Ice Sheet Sensitivity
National Science Foundation (NSF), grant/award no. 1304109: Collaborative Research: Refining Long-term Climate Records from the Renland Ice Cap
Coverage:
Latitude: 71.303667 * Longitude: -26.713111
Minimum DEPTH, ice/snow: 5.0075 m * Maximum DEPTH, ice/snow: 584.0725 m
Event(s):
Comment:
Technical note on the MEM gap-filling methodology:
The MEM infilled data have been generated using the Fahlmann and Ulrych (1982) MEM #interpolation scheme. The MEM infilling is carried out iteratively by first filling out the smallest gap in the #data, and then use progressively larger and larger data sections (connected by small infilled gaps) to infill larger and larger gaps in the data series. The AR order of the MEM infilling routine is adaptive (as it is limited by the length of the data sections without gaps used to calculate the AR coefficients), but the AR order #has nevertheless been capped at a maximum of 500 irrespective of data availability.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Gkinis, Vasileios | Geocode – Centre depth of each interval | |
| 2 | δ18O, water | δ18O H2O | ‰ SMOW | Gkinis, Vasileios | Measured and calibrated on the SMOW/SLAP scale | |
| 3 | δ18O, water | δ18O H2O | ‰ SMOW | Gkinis, Vasileios | Maximum Entropy Method gap-filled d18 | |
| 4 | δ18O, water, standard deviation | δ18O H2O std dev | ± | Gkinis, Vasileios | Compound measurement noise estimation for δ18O | |
| 5 | δ Deuterium, water | δD H2O | ‰ SMOW | Gkinis, Vasileios | Measured and calibrated on the SMOW/SLAP scale | |
| 6 | δ Deuterium, water | δD H2O | ‰ SMOW | Gkinis, Vasileios | Maximum Entropy Method gap-filled dD | |
| 7 | δ Deuterium, water, standard deviation | δD H2O std dev | ± | Gkinis, Vasileios | Compound measurement noise estimation for δD | |
| 8 | AGE | Age | ka BP | Gkinis, Vasileios | Geocode – based on linear interpolation on the Simonasen et al 2019 age scale | |
| 9 | Age | Age | ka b2k | Gkinis, Vasileios | based on linear interpolation on the Simonasen et al 2019 age scale | |
| 10 | Age | Age | a AD/CE | Gkinis, Vasileios | based on linear interpolation on the Simonasen et al 2019 age scale |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
910280 data points
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