Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017
The present dataset includes 2-Dimensional (2-D) micro computed tomography (CT) reconstructions obtained from depths of 10-80 meters (m) firn from Summit, Greenland using the micro CT; comparison before the strain with after the strain of 4% from reconstructed 3-Dimensional (3-D) images (horizontal...
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Arctic Data Center
2020
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dataone:urn:uuid:4aeaa085-a509-4335-9291-58fc3522e28b 2024-06-03T18:46:52+00:00 Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 Ian Baker Yuan Li An ~80 mm diameter, 80 m long firn core, was drilled at Summit, Greenland (72°35’ N, 38°25’ W). ENVELOPE(-38.42,-38.42,72.58,72.58) BEGINDATE: 2017-06-01T00:00:00Z ENDDATE: 2017-06-01T00:00:00Z 2020-01-01T00:00:00Z https://search.dataone.org/view/urn:uuid:4aeaa085-a509-4335-9291-58fc3522e28b unknown Arctic Data Center firn, densification microcomputed X-ray tomography dynamic observation microstructure Dataset 2020 dataone:urn:node:ARCTIC 2024-06-03T18:16:39Z The present dataset includes 2-Dimensional (2-D) micro computed tomography (CT) reconstructions obtained from depths of 10-80 meters (m) firn from Summit, Greenland using the micro CT; comparison before the strain with after the strain of 4% from reconstructed 3-Dimensional (3-D) images (horizontal cross section) from the micro CT for 30 m firn specimen; stress as a function of strain for depths of 10-80 m during interrupted compressive tests; plots of density, the area-equivalent circle diameter (ECDa – a measure of the feature pore-size), the structure thickness (S.Th - a measure of the feature grain-size), total porosity, closed porosity, the specific surface area (SSA) and the structure model index (SMI - a measure of the prevalent ice curvature) respectively as a function of strain for depths of 10-80 m; grain size obtained using the micro CT as a function of depth or strain; SMI evolution with depth for before the test for depths of 10-80 m; 2-D reconstructions obtained using the micro CT 0% strain to 4% strain for the 30 m specimen; semi-empirical model for the lattice diffusion and the grain boundary diffusion, and the mean relationship between the density and stress for all tests; comparison of the density calculated from micro CT data with density obtained from measurement of the mass-volume method at each depth; the fitted linear slope of each microstructural parameter with increasing strain for depths of 10-80 m; the fitted mean density and the fraction of lattice diffusion α evaluated using the semi-empirical model under the corresponding stresses. We share this dataset with other glaciologists, material scientists, experimental geophysicists, and all other researchers and engineers in order to improve our understanding on the scientific issue of snow, firn and ice. Dataset Greenland Arctic Data Center (via DataONE) Greenland ENVELOPE(-38.42,-38.42,72.58,72.58) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
firn, densification microcomputed X-ray tomography dynamic observation microstructure |
spellingShingle |
firn, densification microcomputed X-ray tomography dynamic observation microstructure Ian Baker Yuan Li Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 |
topic_facet |
firn, densification microcomputed X-ray tomography dynamic observation microstructure |
description |
The present dataset includes 2-Dimensional (2-D) micro computed tomography (CT) reconstructions obtained from depths of 10-80 meters (m) firn from Summit, Greenland using the micro CT; comparison before the strain with after the strain of 4% from reconstructed 3-Dimensional (3-D) images (horizontal cross section) from the micro CT for 30 m firn specimen; stress as a function of strain for depths of 10-80 m during interrupted compressive tests; plots of density, the area-equivalent circle diameter (ECDa – a measure of the feature pore-size), the structure thickness (S.Th - a measure of the feature grain-size), total porosity, closed porosity, the specific surface area (SSA) and the structure model index (SMI - a measure of the prevalent ice curvature) respectively as a function of strain for depths of 10-80 m; grain size obtained using the micro CT as a function of depth or strain; SMI evolution with depth for before the test for depths of 10-80 m; 2-D reconstructions obtained using the micro CT 0% strain to 4% strain for the 30 m specimen; semi-empirical model for the lattice diffusion and the grain boundary diffusion, and the mean relationship between the density and stress for all tests; comparison of the density calculated from micro CT data with density obtained from measurement of the mass-volume method at each depth; the fitted linear slope of each microstructural parameter with increasing strain for depths of 10-80 m; the fitted mean density and the fraction of lattice diffusion α evaluated using the semi-empirical model under the corresponding stresses. We share this dataset with other glaciologists, material scientists, experimental geophysicists, and all other researchers and engineers in order to improve our understanding on the scientific issue of snow, firn and ice. |
format |
Dataset |
author |
Ian Baker Yuan Li |
author_facet |
Ian Baker Yuan Li |
author_sort |
Ian Baker |
title |
Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 |
title_short |
Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 |
title_full |
Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 |
title_fullStr |
Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 |
title_full_unstemmed |
Dynamic Observations of the Densification of Greenland Firn under Compression using a microcomputed X-ray tomography, June 2017 |
title_sort |
dynamic observations of the densification of greenland firn under compression using a microcomputed x-ray tomography, june 2017 |
publisher |
Arctic Data Center |
publishDate |
2020 |
url |
https://search.dataone.org/view/urn:uuid:4aeaa085-a509-4335-9291-58fc3522e28b |
op_coverage |
An ~80 mm diameter, 80 m long firn core, was drilled at Summit, Greenland (72°35’ N, 38°25’ W). ENVELOPE(-38.42,-38.42,72.58,72.58) BEGINDATE: 2017-06-01T00:00:00Z ENDDATE: 2017-06-01T00:00:00Z |
long_lat |
ENVELOPE(-38.42,-38.42,72.58,72.58) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
_version_ |
1800872285609918464 |