Tidal modulation of ice shelf buttressing stresses
Ocean tides influence the flow of marine-terminating glaciers. Observations indicate that the large fortnightly variations in ice flow at Rutford Ice Stream in West Antarctica originate in the floating ice shelf. We show that nonlinear variations in ice shelf buttressing driven by tides can produce...
Published in: | Annals of Glaciology |
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Language: | English |
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Cambridge University Press
2017
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Online Access: | http://nora.nerc.ac.uk/id/eprint/518805/ https://nora.nerc.ac.uk/id/eprint/518805/1/tidal_modulation_of_ice_shelf_buttressing_stresses.pdf https://doi.org/10.1017/aog.2017.22 |
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ftnerc:oai:nora.nerc.ac.uk:518805 2023-05-15T13:29:39+02:00 Tidal modulation of ice shelf buttressing stresses Robel, Alexander A. Tsai, Victor C. Minchew, Brent Simons, Mark 2017-04 text http://nora.nerc.ac.uk/id/eprint/518805/ https://nora.nerc.ac.uk/id/eprint/518805/1/tidal_modulation_of_ice_shelf_buttressing_stresses.pdf https://doi.org/10.1017/aog.2017.22 en eng Cambridge University Press https://nora.nerc.ac.uk/id/eprint/518805/1/tidal_modulation_of_ice_shelf_buttressing_stresses.pdf Robel, Alexander A.; Tsai, Victor C.; Minchew, Brent; Simons, Mark. 2017 Tidal modulation of ice shelf buttressing stresses. Annals of Glaciology, 58 (74). 12-20. https://doi.org/10.1017/aog.2017.22 <https://doi.org/10.1017/aog.2017.22> cc_by_4 CC-BY Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1017/aog.2017.22 2023-02-04T19:45:50Z Ocean tides influence the flow of marine-terminating glaciers. Observations indicate that the large fortnightly variations in ice flow at Rutford Ice Stream in West Antarctica originate in the floating ice shelf. We show that nonlinear variations in ice shelf buttressing driven by tides can produce such fortnightly variations in ice flow. These nonlinearities in the tidal modulation of buttressing stresses can be caused by asymmetries in the contact stress from migration of the grounding line and bathymetric pinning points beneath the ice shelf. Using a simple viscoelastic model, we demonstrate that a combination of buttressing and hydrostatic stress variations can explain a diverse range of tidal variations in ice shelf flow, including the period, phase and amplitude of flow variations observed at Rutford and Bindschadler Ice Streams. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctica Ice Shelf Rutford Ice Stream West Antarctica Natural Environment Research Council: NERC Open Research Archive Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) West Antarctica Annals of Glaciology 58 74 12 20 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Ocean tides influence the flow of marine-terminating glaciers. Observations indicate that the large fortnightly variations in ice flow at Rutford Ice Stream in West Antarctica originate in the floating ice shelf. We show that nonlinear variations in ice shelf buttressing driven by tides can produce such fortnightly variations in ice flow. These nonlinearities in the tidal modulation of buttressing stresses can be caused by asymmetries in the contact stress from migration of the grounding line and bathymetric pinning points beneath the ice shelf. Using a simple viscoelastic model, we demonstrate that a combination of buttressing and hydrostatic stress variations can explain a diverse range of tidal variations in ice shelf flow, including the period, phase and amplitude of flow variations observed at Rutford and Bindschadler Ice Streams. |
format |
Article in Journal/Newspaper |
author |
Robel, Alexander A. Tsai, Victor C. Minchew, Brent Simons, Mark |
spellingShingle |
Robel, Alexander A. Tsai, Victor C. Minchew, Brent Simons, Mark Tidal modulation of ice shelf buttressing stresses |
author_facet |
Robel, Alexander A. Tsai, Victor C. Minchew, Brent Simons, Mark |
author_sort |
Robel, Alexander A. |
title |
Tidal modulation of ice shelf buttressing stresses |
title_short |
Tidal modulation of ice shelf buttressing stresses |
title_full |
Tidal modulation of ice shelf buttressing stresses |
title_fullStr |
Tidal modulation of ice shelf buttressing stresses |
title_full_unstemmed |
Tidal modulation of ice shelf buttressing stresses |
title_sort |
tidal modulation of ice shelf buttressing stresses |
publisher |
Cambridge University Press |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/518805/ https://nora.nerc.ac.uk/id/eprint/518805/1/tidal_modulation_of_ice_shelf_buttressing_stresses.pdf https://doi.org/10.1017/aog.2017.22 |
long_lat |
ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) |
geographic |
Rutford Rutford Ice Stream West Antarctica |
geographic_facet |
Rutford Rutford Ice Stream West Antarctica |
genre |
Annals of Glaciology Antarc* Antarctica Ice Shelf Rutford Ice Stream West Antarctica |
genre_facet |
Annals of Glaciology Antarc* Antarctica Ice Shelf Rutford Ice Stream West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/518805/1/tidal_modulation_of_ice_shelf_buttressing_stresses.pdf Robel, Alexander A.; Tsai, Victor C.; Minchew, Brent; Simons, Mark. 2017 Tidal modulation of ice shelf buttressing stresses. Annals of Glaciology, 58 (74). 12-20. https://doi.org/10.1017/aog.2017.22 <https://doi.org/10.1017/aog.2017.22> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/aog.2017.22 |
container_title |
Annals of Glaciology |
container_volume |
58 |
container_issue |
74 |
container_start_page |
12 |
op_container_end_page |
20 |
_version_ |
1766001760852246528 |