Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets
The crystal orientation fabric (COF) of a polar ice sheet has a significant effect on the rheology of the ice sheet. With the aim of better understanding the deformation regime of ice sheets, the work presented here investigates the COF in the upper 80 % of the Dome Fuji Station ice core in East Ant...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00062018 2023-05-15T13:49:21+02:00 Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets Saruya, Tomotaka Fujita, Shuji Iizuka, Yoshinori Miyamoto, Atsushi Ohno, Hiroshi Hori, Akira Shigeyama, Wataru Hirabayashi, Motohiro Goto-Azuma, Kumiko 2022-07 electronic https://doi.org/10.5194/tc-16-2985-2022 https://noa.gwlb.de/receive/cop_mods_00062018 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061357/tc-16-2985-2022.pdf https://tc.copernicus.org/articles/16/2985/2022/tc-16-2985-2022.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-2985-2022 https://noa.gwlb.de/receive/cop_mods_00062018 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061357/tc-16-2985-2022.pdf https://tc.copernicus.org/articles/16/2985/2022/tc-16-2985-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-2985-2022 2022-07-31T23:11:40Z The crystal orientation fabric (COF) of a polar ice sheet has a significant effect on the rheology of the ice sheet. With the aim of better understanding the deformation regime of ice sheets, the work presented here investigates the COF in the upper 80 % of the Dome Fuji Station ice core in East Antarctica. Dielectric anisotropy (Δε) data were acquired as a novel indicator of the vertical clustering of COF resulting from vertical compressional strain within the dome. The Δε values were found to exhibit a general increase with depth, but with fluctuations over distances in the order of 10–102 m. In addition, significant decreases in Δε were found to be associated with depths corresponding to three major glacial to interglacial transitions. These changes in Δε are ascribed to variations in the deformational history caused by dislocation motion occurring from near-surface depths to deeper layers. Fluctuations in Δε over distances of less than 0.5 m exhibited a strong inverse correlation with Δε at depths greater than approximately 1200 m, indicating that they were enhanced during the glacial-interglacial transitions. The Δε data also exhibited a positive correlation with the concentration of chloride ions and an inverse correlation with the amount of dust particles in the ice core at greater depths corresponding to decreases in the degree of c axis clustering. Finally, we found that fluctuations in Δε persisted to approximately 80 % of the total depth of the ice sheet. These data suggest that the factors determining the deformation of ice include the concentration of chloride ions and the amount of dust particles, and that the layered contrast associated with the COF is preserved all the way from the near-surface to a depth corresponding to approximately 80 % of the thickness of the ice sheet. These findings provide important implications regarding further development of the COF under the various stress-strain configurations that the ice will experience in the deepest region, approximately 20 % of the total depth ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Dome Fuji Station ENVELOPE(39.703,39.703,-77.317,-77.317) Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) East Antarctica The Cryosphere 16 7 2985 3003 |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Saruya, Tomotaka Fujita, Shuji Iizuka, Yoshinori Miyamoto, Atsushi Ohno, Hiroshi Hori, Akira Shigeyama, Wataru Hirabayashi, Motohiro Goto-Azuma, Kumiko Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets |
topic_facet |
article Verlagsveröffentlichung |
description |
The crystal orientation fabric (COF) of a polar ice sheet has a significant effect on the rheology of the ice sheet. With the aim of better understanding the deformation regime of ice sheets, the work presented here investigates the COF in the upper 80 % of the Dome Fuji Station ice core in East Antarctica. Dielectric anisotropy (Δε) data were acquired as a novel indicator of the vertical clustering of COF resulting from vertical compressional strain within the dome. The Δε values were found to exhibit a general increase with depth, but with fluctuations over distances in the order of 10–102 m. In addition, significant decreases in Δε were found to be associated with depths corresponding to three major glacial to interglacial transitions. These changes in Δε are ascribed to variations in the deformational history caused by dislocation motion occurring from near-surface depths to deeper layers. Fluctuations in Δε over distances of less than 0.5 m exhibited a strong inverse correlation with Δε at depths greater than approximately 1200 m, indicating that they were enhanced during the glacial-interglacial transitions. The Δε data also exhibited a positive correlation with the concentration of chloride ions and an inverse correlation with the amount of dust particles in the ice core at greater depths corresponding to decreases in the degree of c axis clustering. Finally, we found that fluctuations in Δε persisted to approximately 80 % of the total depth of the ice sheet. These data suggest that the factors determining the deformation of ice include the concentration of chloride ions and the amount of dust particles, and that the layered contrast associated with the COF is preserved all the way from the near-surface to a depth corresponding to approximately 80 % of the thickness of the ice sheet. These findings provide important implications regarding further development of the COF under the various stress-strain configurations that the ice will experience in the deepest region, approximately 20 % of the total depth ... |
format |
Article in Journal/Newspaper |
author |
Saruya, Tomotaka Fujita, Shuji Iizuka, Yoshinori Miyamoto, Atsushi Ohno, Hiroshi Hori, Akira Shigeyama, Wataru Hirabayashi, Motohiro Goto-Azuma, Kumiko |
author_facet |
Saruya, Tomotaka Fujita, Shuji Iizuka, Yoshinori Miyamoto, Atsushi Ohno, Hiroshi Hori, Akira Shigeyama, Wataru Hirabayashi, Motohiro Goto-Azuma, Kumiko |
author_sort |
Saruya, Tomotaka |
title |
Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets |
title_short |
Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets |
title_full |
Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets |
title_fullStr |
Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets |
title_full_unstemmed |
Development of crystal orientation fabric in the Dome Fuji ice core in East Antarctica: implications for the deformation regime in ice sheets |
title_sort |
development of crystal orientation fabric in the dome fuji ice core in east antarctica: implications for the deformation regime in ice sheets |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-2985-2022 https://noa.gwlb.de/receive/cop_mods_00062018 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061357/tc-16-2985-2022.pdf https://tc.copernicus.org/articles/16/2985/2022/tc-16-2985-2022.pdf |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(39.703,39.703,-77.317,-77.317) ENVELOPE(166.000,166.000,-85.367,-85.367) |
geographic |
Dome Fuji Dome Fuji Station Dome The East Antarctica |
geographic_facet |
Dome Fuji Dome Fuji Station Dome The East Antarctica |
genre |
Antarc* Antarctica East Antarctica ice core Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ice Sheet The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-2985-2022 https://noa.gwlb.de/receive/cop_mods_00062018 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061357/tc-16-2985-2022.pdf https://tc.copernicus.org/articles/16/2985/2022/tc-16-2985-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-2985-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
7 |
container_start_page |
2985 |
op_container_end_page |
3003 |
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1766251231444992000 |