Steen-Larsen, Hans Christian; Sveinbjörnsdottir, Árný E; Ólafsdóttir, Rosa; Behrens, Melanie; Faber, Anne-Katrine; Freitag, Johannes; Hoffmann, Andrew; Hörhold, Maria; Kahle, Emma; Kipfstuhl, Sepp; Madsen, Martin V; Meyer, Hannah; Town, Michael S; Vladimirova, Diana; Wahl, Sonja; Zolles, Tobias; Zuhr, Alexandra (2024): Snow Profiles of stable water isotopes at the EastGRIP deep drilling site, summer seasons 2017 - 2019 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.963834
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Abstract:
Throughout the summer seasons 2017 to 2019 snow profiles were taken repeatedly. The sample positions are aligned along a 300 m wind-parallel transect at the EastGRIP ice core deep drilling site. The snow was collected at 6 positions with a 20 – 50 m spacing. Snow was sampled using carbon fiber tubes of 1-m length that were pushed gently into the snow. A maximum compaction of 1 cm was observed during extraction. The snow cores were carefully removed from the carbon fiber tubes on the cutting table. The core was then cut into slices of 1 cm thickness for the upper 10 cm and 2 cm thickness for the lower 90 cm. The samples were placed into Whirl-Pak® bags and closed airtight. The samples were shipped frozen to the Alfred-Wegener-Institut and stored at -25 °C. Prior to measurements, the samples were melted in the sample bags at room temperature. For the measurement of the isotopic composition, the instrument Picarro L2130-i were used. The measurement set-up followed the Van-Geldern protocol (Van Geldern and Barth, 2012). Each sample was injected 4 times unless otherwise noted in the comment column. As a measure of accuracy, we calculated the combined standard uncertainty (Magnusson, et al., 2017) including the long-term reproducibility and bias of our laboratory by measuring a quality check standard in each measurement run and including the uncertainty of the certified standards. The combined uncertainty for δ18O is 0.11 ‰ and for δ2H is 0.8 ‰. Deuterium excess is calculated as both
1) d = dD - 8*d18O; (Merlivat and Jouzel, 1979) and 2) dln = ln(dD + 1) - 8.47(ln(d18O+1)) - 28.5(ln(d18O+1))2; (Uemura et al., 2012).
Related to:
Town, Michael S; Steen-Larsen, Hans Christian; Wahl, Sonja; Faber, Anne-Katrine (2023): Water isotopologues of near-surface polar snow from short (1-m) snow cores, extracted from the EastGRIP site on Greenland Ice Sheet during summers 2017-2019 with age-depth model (depthIndex_manualConstModel). PANGAEA, https://doi.org/10.1594/PANGAEA.959353
Town, Michael S; Steen-Larsen, Hans Christian; Wahl, Sonja; Faber, Anne-Katrine; Behrens, Melanie; Hörhold, Maria; Jones, Tyler R; Sveinbjörnsdottir, Árný E; Zuhr, Alexandra (in review): Post-depositional modication on seasonal and 1 interannual timescales resets the deuterium excess 2 signals in summer snow layers in Greenland. https://doi.org/10.22541/essoar.168182324.45322239/v1
References:
Magnusson, B; Näykki, T; Hovind, H; Krysell, M; Sahlin, E (2017): Handbook for calculation of measurement uncertainty in environmental laboratories. Nordtest Report TR 537 (ed. 4)
Merlivat, Liliane; Jouzel, Jean (1979): Global climatic interpretation of the deuterium-oxygen 18 relationship for precipitation. Journal of Geophysical Research, 84(C8), 5029, https://doi.org/10.1029/JC084iC08p05029
Uemura, Ryu; Masson-Delmotte, Valerie; Jouzel, Jean; Landais, Amaëlle; Motoyama, Hideaki; Stenni, Barbara (2012): Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial–interglacial cycles. Climate of the Past, 8(3), 1109-1125, https://doi.org/10.5194/cp-8-1109-2012
van Geldern, Robert; Barth, Johannes A C (2012): Optimization of instrument setup and post-run corrections for oxygen and hydrogen stable isotope measurements of water by isotope ratio infrared spectroscopy (IRIS). Limnology and Oceanography-Methods, 10(12), 1024-1036, https://doi.org/10.4319/lom.2012.10.1024
Project(s):
Funding:
European Research Council (ERC), grant/award no. 759526: Signals from the Surface Snow: Post-Depositional Processes Controlling the Ice Core Isotopic Fingerprint
Coverage:
Latitude: 75.630000 * Longitude: -35.980000
Date/Time Start: 2017-05-02T12:00:00 * Date/Time End: 2019-05-29T12:00:00
Minimum DEPTH, ice/snow: 0.0055 m * Maximum DEPTH, ice/snow: 1.0065 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Steen-Larsen, Hans Christian | Geocode | ||
| 2 | Position | Position | Steen-Larsen, Hans Christian | transect # | ||
| 3 | DEPTH, ice/snow | Depth ice/snow | m | Steen-Larsen, Hans Christian | Geocode | |
| 4 | δ18O, water | δ18O H2O | ‰ SMOW | Steen-Larsen, Hans Christian | Cavity ring-down spectroscopy (CRDS), isotopic water analyzer L2130-i, Picarro Inc. | |
| 5 | δ Deuterium, water | δD H2O | ‰ SMOW | Steen-Larsen, Hans Christian | Cavity ring-down spectroscopy (CRDS), isotopic water analyzer L2130-i, Picarro Inc. | |
| 6 | Deuterium excess | d xs | ‰ | Steen-Larsen, Hans Christian | According to Merlivat and Jouzel (1979) | |
| 7 | ln-Deuterium excess | ln(d xs) | Steen-Larsen, Hans Christian | According to Uemura et al. (2012) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
11963 data points
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