Citation:

PANGAEA.945566

Name: Snow stable water isotopes of a sublimation sampling scheme at the EastGRIP deep drilling site, summer season 2019
Published: 2022-06-21
License: https://creativecommons.org/licenses/by/4.0/
Keywords: EastGRIP; snow-air-exchange; snow samples; stable water isotopes; sublimation scheme

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Abstract:

Snow samples were taken along a 90 m transect at the EastGRIP ice core deep drilling site perpendicular to the prevailing wind direction.The snow was collected after precipitation events from the very surface (0 - 0.5 cm) and from the top centimeter at 10 positions with 10 m spacing. The samples were shipped frozen to the Alfred-Wegener-Institute 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 a Picarro L2120-i, a Picarro L2140-i and a Picarro L2130-i with a high-throughput vaporizer (model A0212) was used. The measurement set-up followed the Van-Geldern protocol (van Geldern and Barth, 2012). Each sample was injected four times and the standard deviation is computed. We calculate the average over all the standard deviations as a measure of uncertainty. We find this average to be 0.03 permil for δ18O (with stdev 0.02) and 0.13 permil for δD (stdev 0.11). The maximum standard deviation within the data set was found to be 0.10 for δ18O and 0.8 for δD. As a measure of accuracy the off-set between the defined and measured value of the quality check standard for each measurement run is provided. We calculate the average of this off-set for the whole data set and obtain a value of -0.04 permil for δ18O (stdev 0.07) and -0.6 permil for δD (stdev 0.4). The maximum off-set found within the data set was 0.18 permil for δ18O and -1.5 permil for δD.

Keyword(s):

EastGRIP; snow-air-exchange; snow samples; stable water isotopes; sublimation scheme

Supplement to:

Wahl, Sonja; Steen-Larsen, Hans Christian; Hughes, A G; Dietrich, L J; Zuhr, Alexandra; Behrens, Melanie; Faber, Anne-Katrine; Hörhold, Maria (2022): Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability. Geophysical Research Letters, 49(20), https://doi.org/10.1029/2022GL099529

Related to:

Hörhold, Maria; Behrens, Melanie; Wahl, Sonja; Faber, Anne-Katrine; Zuhr, Alexandra; Meyer, Hannah; Steen-Larsen, Hans Christian (2022): Snow stable water isotopes of a surface transect at the EastGRIP deep drilling site, summer season 2019. PANGAEA, https://doi.org/10.1594/PANGAEA.945563

Hörhold, Maria; Behrens, Melanie; Wahl, Sonja; Faber, Anne-Katrine; Zuhr, Alexandra; Meyer, Hannah; Steen-Larsen, Hans Christian (2022): Snow stable water isotopes of precipitation samples at the EastGRIP deep drilling site, summer season 2019. PANGAEA, https://doi.org/10.1594/PANGAEA.945545

Hörhold, Maria; Behrens, Melanie; Wahl, Sonja; Faber, Anne-Katrine; Zuhr, Alexandra; Zolles, Tobias; Steen-Larsen, Hans Christian (2022): Snow stable water isotopes of a surface transect at the EastGRIP deep drilling site, summer season 2018. PANGAEA, https://doi.org/10.1594/PANGAEA.945544

Vinther, Bo Møllesøe; Freitag, Johannes; Kipfstuhl, Sepp; Weißbach, Stefanie; Karlsson, Nanna Bjørnholt; Münch, Thomas; Hörhold, Maria (2022): Extension of the stable oxygen isotope and density profile of the B26 ice core. PANGAEA, https://doi.org/10.1594/PANGAEA.945670

Project(s):

East Greenland Ice-core Project (EGRIP)

Polar Terrestrial Environmental Systems @ AWI (AWI_Envi)

Signals from the Surface Snow: Post-Depositional Processes Controlling the Ice Core Isotopic Fingerprint (SNOWISO)

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: 2019-06-16T20:00:00 * Date/Time End: 2019-07-23T11:00:00

Event(s):

EGRIP (EastGRIP) * Latitude: 75.630000 * Longitude: -35.980000 * Location: Greenland * Method/Device: Ice drill (ICEDRILL)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)