Tidal Flexure of Jakobshavns Glacier, West Greenland
Jakobshavns Glacier, a floating outlet glacier on the West Greenland coast, was surveyed during July 1976. The vertical displacements of targets along two profiles perpendicular to the fjord wall bounding the north margin of the glacier were analyzed to determine the effect of flexure caused by tida...
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DigitalCommons@UMaine
1981
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1113 2024-09-15T18:07:38+00:00 Tidal Flexure of Jakobshavns Glacier, West Greenland Lingle, Craig S. Hughes, Terence J. Kollmeyer, Ronald C. 1981-01-01T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/114 https://doi.org/10.1029/JB086iB05p03960 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1113/viewcontent/hughes_86_3960_3968.pdf unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/114 doi:10.1029/JB086iB05p03960 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1113/viewcontent/hughes_86_3960_3968.pdf This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Earth Sciences text 1981 ftmaineuniv https://doi.org/10.1029/JB086iB05p03960 2024-07-24T05:38:40Z Jakobshavns Glacier, a floating outlet glacier on the West Greenland coast, was surveyed during July 1976. The vertical displacements of targets along two profiles perpendicular to the fjord wall bounding the north margin of the glacier were analyzed to determine the effect of flexure caused by tidal oscillations within the fjord. An analysis based on the assumption that vertical displacements of the glacier reflected pure elastic bending yielded the conclusion that the effective thickness of the ice (i.e., the thickness which remained unaffected by surface and basal cracking and which behaved as a continuum) was ∼160 m 2.6 km upglacier from the calving front and ∼110 m 0.6 km from the calving front. An analysis based on the more realistic assumption that observed bending reflected elastic and viscoplastic deformation yielded the conclusion that the average effective thickness of the ice was 316 ± 74 m (∼40% of the estimated 800-m total thickness) 2.6 km from the calving front and 160 ± 48 m (∼21% of the estimated 750-m total) 0.6 km from the calving front. A constitutive relationship appropriate for hard glide during flexure was used. Text glacier Greenland The University of Maine: DigitalCommons@UMaine Journal of Geophysical Research: Solid Earth 86 B5 3960 3968 |
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Open Polar |
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The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Lingle, Craig S. Hughes, Terence J. Kollmeyer, Ronald C. Tidal Flexure of Jakobshavns Glacier, West Greenland |
topic_facet |
Earth Sciences |
description |
Jakobshavns Glacier, a floating outlet glacier on the West Greenland coast, was surveyed during July 1976. The vertical displacements of targets along two profiles perpendicular to the fjord wall bounding the north margin of the glacier were analyzed to determine the effect of flexure caused by tidal oscillations within the fjord. An analysis based on the assumption that vertical displacements of the glacier reflected pure elastic bending yielded the conclusion that the effective thickness of the ice (i.e., the thickness which remained unaffected by surface and basal cracking and which behaved as a continuum) was ∼160 m 2.6 km upglacier from the calving front and ∼110 m 0.6 km from the calving front. An analysis based on the more realistic assumption that observed bending reflected elastic and viscoplastic deformation yielded the conclusion that the average effective thickness of the ice was 316 ± 74 m (∼40% of the estimated 800-m total thickness) 2.6 km from the calving front and 160 ± 48 m (∼21% of the estimated 750-m total) 0.6 km from the calving front. A constitutive relationship appropriate for hard glide during flexure was used. |
format |
Text |
author |
Lingle, Craig S. Hughes, Terence J. Kollmeyer, Ronald C. |
author_facet |
Lingle, Craig S. Hughes, Terence J. Kollmeyer, Ronald C. |
author_sort |
Lingle, Craig S. |
title |
Tidal Flexure of Jakobshavns Glacier, West Greenland |
title_short |
Tidal Flexure of Jakobshavns Glacier, West Greenland |
title_full |
Tidal Flexure of Jakobshavns Glacier, West Greenland |
title_fullStr |
Tidal Flexure of Jakobshavns Glacier, West Greenland |
title_full_unstemmed |
Tidal Flexure of Jakobshavns Glacier, West Greenland |
title_sort |
tidal flexure of jakobshavns glacier, west greenland |
publisher |
DigitalCommons@UMaine |
publishDate |
1981 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/114 https://doi.org/10.1029/JB086iB05p03960 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1113/viewcontent/hughes_86_3960_3968.pdf |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/114 doi:10.1029/JB086iB05p03960 https://digitalcommons.library.umaine.edu/context/ers_facpub/article/1113/viewcontent/hughes_86_3960_3968.pdf |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
op_doi |
https://doi.org/10.1029/JB086iB05p03960 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
86 |
container_issue |
B5 |
container_start_page |
3960 |
op_container_end_page |
3968 |
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1810445022975229952 |