Publishing Network for Geoscientific and Environmental Data
Not a member yet
441201 research outputs found
Sort by
Water isotopic measurements of the basal ice layers of the 1966 Camp Century ice core (Greenland)
No full textThe 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
Grain properties and crystal-preferred orientation for EGRIP ice core samples (horizontal sections), 111-2664 m depth
No full textFabric Analyser (G50, Russell-Head Instruments) image data from horizontal thin sections from the EGRIP ice core were processed with the software cAxes (version 21.06.21 slim), using manually prepared mask images (background.bmp) to exclude image artefacts from the sample margins, to obtain segmented grain data and crystal-preferred orientation data. 66 sections from 18 bags were measured in the field camp at EGRIP, Greenland, during field seasons 2017, 2018, 2019, 2022, and 2023. A bag refers to an ice core segment of 55 cm length which is typically cut into six pieces of 9 cm length from which thin sections are prepared using a manual sledge microtome. Horizonal sections were prepared only from ice core volume samples (75% of ice core from bottom of approx. every 200th bag, corresponding to depth of 6th sample in bag). Data are not available between 2121 and 2417 m. The results from the image processing include a table listing samples, ice core depth and per-section statistical parameters on grains (number, mean grain size) and c-axis orientation (grain- and area-weighted second-order orientation tensor eigenvalues, woodcock parameter). For each sample attached data files provide additional info on grains in a section (*grains.txt), measurement, processing parameters and further statistical c-axis orientation parameters (*results.txt) and a false-color image of the section showing microstructure and per-grain c-axis orientation via a colorcode (*rgb.png). Sample files are named according to the convention EGRIP_-_
Master tracks in different resolutions of ALKOR cruise AL633, Kiel - Kiel, 2025-05-24 - 2025-06-11
No full textRaw data acquired by position sensors on board RV Alkor during expedition AL633 were processed to receive a validated master track which can be used as reference of further expedition data. During AL633 data from the Seapath 330 system, the Furuno GP-170 and the Furuno GP-150 GPS receivers were used to calculate the mastertrack. Data were downloaded from DAVIS SHIP data base (http://dship.bsh.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2023-12-05
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2023-12-06
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2023-12-09
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2023-12-21
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2024-01-27
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2024-02-03
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)
Video In Situ Snowfall Sensor (VISSS) data for Eriswil on 2024-02-26
No full textThe VISSS is a camera system recording precipitating snowfall from two perspectives. Here, movies and images of falling precipitation particles are provided for one day at station Eriswil. For further details on the VISSS see Maahn et al. (2024)