Snow stable water isotopes of a 0.5 cm deep surface transect at the EastGRIP deep drilling site, summer season 2019 ...

• Main Authors: Hörhold, Maria, Behrens, Melanie, Wahl, Sonja, Faber, Anne-Katrine, Zuhr, Alexandra, Meyer, Hannah, Steen-Larsen, Hans Christian
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: EastGRIP; snow-air-exchange; SNOWISO; stable water isotopes; surface transect; DATE/TIME; DEPTH, ice/snow; Depth, top/min; Depth, bottom/max; δ18O, water; δ Deuterium, water; Ice drill; Mass spectrometer; 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; Greenland; East Greenland; East Greenland Ice-core Project; Greenland ice core; Greenland Ice core Project; ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.945561; https://doi.pangaea.de/10.1594/PANGAEA.945561

Snow samples were taken on a daily basis along a 100 m wind-parallel transect at the EastGRIP ice core deep drilling site. The snow was collected in the morning at 11 positions with 10 m spacing into four cumulative samples – each for one depth interval. The depth intervals are top 0.5 cm , top 1 cm , top 2 cm and top 5 cm . Each day, undisturbed snow was sampled and the exact sample location marked to avoid sampling disturbed snow during the next sampling event. 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 instruments Picarro L2120-i and Picarro L2140-i were used. The measurement set-up followed the Van-Geldern Protocol. 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 0.01 permil for δ18O (with ...