Crystal c-axes (fabric analyser G50) of ice core samples (vertical thin sections) collected from the polar ice core EGRIP, 111-2651 m depth
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| _version_ | 1867171345408720896 |
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| author | Weikusat, Ilka Stoll, Nicolas Eichler, Jan Kerch, Johanna Kleitz, Ina Jansen, Daniela Shigeyama, Wataru Homma, Tomoyuki Bayer, Maddalena Götz, Pia Kuiper, Ernst-Jan N Westhoff, Julien Saruya, Tomotaka Franke, Steven Hellmann, Sebastian Rathmann, Nicolas Wallis, David Cook, Eliza Kipfstuhl, Sepp |
| author_facet | Weikusat, Ilka Stoll, Nicolas Eichler, Jan Kerch, Johanna Kleitz, Ina Jansen, Daniela Shigeyama, Wataru Homma, Tomoyuki Bayer, Maddalena Götz, Pia Kuiper, Ernst-Jan N Westhoff, Julien Saruya, Tomotaka Franke, Steven Hellmann, Sebastian Rathmann, Nicolas Wallis, David Cook, Eliza Kipfstuhl, Sepp |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Polarisation microscopy image data from vertical thin sections from the EGRIP ice core were acquired with a Fabric Analyser (G50, Russell-Head Instruments). 1152 sections from 225 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 (approx. 250-300 µm thick, max. 7x9 cm²) are prepared using a manual sledge microtome. The majority of bags are continuously sampled with up to six adjacent samples with a bag interval of approx. 10 +- 6 m. Up to three parallel and/or orthogonal vertical 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). Sample folders are named according to the convention EGRIP<bag>\_<section>-<cut>\_<additional-info>. Data are not available between 2121 and 2417 m. Each section folders contains a manually prepared mask image (background.bmp) in preparation for image processing to exclude image artefacts from the sample margins. The resolution of the image data is 500 px/cm. Quality images are provided by the instrument as well as images showing crystal c-axis orientation per pixel. The binary file (data.cis) contains all relevant information to evaluate the section with regard to the crystal-preferred orientation (CPO) of the ice thin sections. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_984220 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Crystal c-axes (fabric analyser G50) of ice core samples (vertical thin sections) collected from the polar ice core EGRIP, 111-2651 m depth Weikusat, Ilka Stoll, Nicolas Eichler, Jan Kerch, Johanna Kleitz, Ina Jansen, Daniela Shigeyama, Wataru Homma, Tomoyuki Bayer, Maddalena Götz, Pia Kuiper, Ernst-Jan N Westhoff, Julien Saruya, Tomotaka Franke, Steven Hellmann, Sebastian Rathmann, Nicolas Wallis, David Cook, Eliza Kipfstuhl, Sepp AWI_Glac; Binary Object; Binary Object (File Size); CPO; crystal anisotropy; DEPTH, ice/snow; East Greenland Ice-core Project; EastGRIP; EGRIP; Fabric; Fabric Analyser; Glaciology @ AWI; Greenland; Ice core; ICEDRILL; Ice drill; polarisation microscopy; Sample code/label Polarisation microscopy image data from vertical thin sections from the EGRIP ice core were acquired with a Fabric Analyser (G50, Russell-Head Instruments). 1152 sections from 225 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 (approx. 250-300 µm thick, max. 7x9 cm²) are prepared using a manual sledge microtome. The majority of bags are continuously sampled with up to six adjacent samples with a bag interval of approx. 10 +- 6 m. Up to three parallel and/or orthogonal vertical 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). Sample folders are named according to the convention EGRIP<bag>\_<section>-<cut>\_<additional-info>. Data are not available between 2121 and 2417 m. Each section folders contains a manually prepared mask image (background.bmp) in preparation for image processing to exclude image artefacts from the sample margins. The resolution of the image data is 500 px/cm. Quality images are provided by the instrument as well as images showing crystal c-axis orientation per pixel. The binary file (data.cis) contains all relevant information to evaluate the section with regard to the crystal-preferred orientation (CPO) of the ice thin sections. |
| title | Crystal c-axes (fabric analyser G50) of ice core samples (vertical thin sections) collected from the polar ice core EGRIP, 111-2651 m depth |
| topic | AWI_Glac; Binary Object; Binary Object (File Size); CPO; crystal anisotropy; DEPTH, ice/snow; East Greenland Ice-core Project; EastGRIP; EGRIP; Fabric; Fabric Analyser; Glaciology @ AWI; Greenland; Ice core; ICEDRILL; Ice drill; polarisation microscopy; Sample code/label |
| url | https://doi.org/10.1594/PANGAEA.984220 |