The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ...
Constraining the onset of dynamic recrystallization and its effects on the mechanical properties of firn is crucial for modeling the firn densification process. To that end, experiments have been conducted on firn samples from 13 meter (m) depth in a Greenland firn core. Changes in the microstructur...
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NSF Arctic Data Center
2023
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Online Access: | https://dx.doi.org/10.18739/a21r6n25h https://arcticdata.io/catalog/view/doi:10.18739/A21R6N25H |
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ftdatacite:10.18739/a21r6n25h 2023-05-15T16:27:26+02:00 The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... Ogunmolasuyi, Ayobami Murdza, Andrii Baker, Ian 2023 text/xml https://dx.doi.org/10.18739/a21r6n25h https://arcticdata.io/catalog/view/doi:10.18739/A21R6N25H en eng NSF Arctic Data Center Firn Densification Recrystallization Microstructural Evolution Rheology dataset Dataset 2023 ftdatacite https://doi.org/10.18739/a21r6n25h 2023-04-03T17:40:48Z Constraining the onset of dynamic recrystallization and its effects on the mechanical properties of firn is crucial for modeling the firn densification process. To that end, experiments have been conducted on firn samples from 13 meter (m) depth in a Greenland firn core. Changes in the microstructural parameters were examined using a combination of polarized optical examination of thin sections and micro-computed tomography (micro-CT) of bulk samples. The mean grain diameter decreases rapidly at the early stage of deformation and levels off as the strain levels increase, while the grain area distribution indicates an increase in the frequency of smaller grains as the strain increases. Analyses of micro-CT reconstructions show an increase in density, due to a decrease in porosity and specific surface area. The results show that dynamic recrystallization occurs in firn under creep, with its onset occurring at a strain of ~12%. The recrystallization leads to both a reduction in grain size and a change in the ... Dataset Greenland DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Firn Densification Recrystallization Microstructural Evolution Rheology |
spellingShingle |
Firn Densification Recrystallization Microstructural Evolution Rheology Ogunmolasuyi, Ayobami Murdza, Andrii Baker, Ian The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... |
topic_facet |
Firn Densification Recrystallization Microstructural Evolution Rheology |
description |
Constraining the onset of dynamic recrystallization and its effects on the mechanical properties of firn is crucial for modeling the firn densification process. To that end, experiments have been conducted on firn samples from 13 meter (m) depth in a Greenland firn core. Changes in the microstructural parameters were examined using a combination of polarized optical examination of thin sections and micro-computed tomography (micro-CT) of bulk samples. The mean grain diameter decreases rapidly at the early stage of deformation and levels off as the strain levels increase, while the grain area distribution indicates an increase in the frequency of smaller grains as the strain increases. Analyses of micro-CT reconstructions show an increase in density, due to a decrease in porosity and specific surface area. The results show that dynamic recrystallization occurs in firn under creep, with its onset occurring at a strain of ~12%. The recrystallization leads to both a reduction in grain size and a change in the ... |
format |
Dataset |
author |
Ogunmolasuyi, Ayobami Murdza, Andrii Baker, Ian |
author_facet |
Ogunmolasuyi, Ayobami Murdza, Andrii Baker, Ian |
author_sort |
Ogunmolasuyi, Ayobami |
title |
The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... |
title_short |
The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... |
title_full |
The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... |
title_fullStr |
The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... |
title_full_unstemmed |
The Onset of Recrystallization in Polar Firn, Summit, Greenland, 2022 ... |
title_sort |
onset of recrystallization in polar firn, summit, greenland, 2022 ... |
publisher |
NSF Arctic Data Center |
publishDate |
2023 |
url |
https://dx.doi.org/10.18739/a21r6n25h https://arcticdata.io/catalog/view/doi:10.18739/A21R6N25H |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_doi |
https://doi.org/10.18739/a21r6n25h |
_version_ |
1766016610278047744 |