Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica
Recent GPS observations from a spatially extensive network across Ronne Ice Shelf show significant daily ice flow variations. At all sites, the almost-synchronous horizontal displacements occur at diurnal and semidiurnal tidal periods. During spring tides, displacements, velocities and strains near...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2012
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Online Access: | http://nora.nerc.ac.uk/id/eprint/18612/ https://nora.nerc.ac.uk/id/eprint/18612/1/grl29179.pdf |
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ftnerc:oai:nora.nerc.ac.uk:18612 2023-05-15T13:45:12+02:00 Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica Makinson, Keith King, Matt A. Nicholls, Keith W. Gudmundsson, G. Hilmar 2012 text http://nora.nerc.ac.uk/id/eprint/18612/ https://nora.nerc.ac.uk/id/eprint/18612/1/grl29179.pdf en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/18612/1/grl29179.pdf Makinson, Keith orcid:0000-0002-5791-1767 King, Matt A.; Nicholls, Keith W. orcid:0000-0002-2188-4509 Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 . 2012 Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica. Geophysical Research Letters, 39, L10501. 5, pp. https://doi.org/10.1029/2012GL051636 <https://doi.org/10.1029/2012GL051636> Publication - Article PeerReviewed 2012 ftnerc https://doi.org/10.1029/2012GL051636 2023-02-04T19:31:51Z Recent GPS observations from a spatially extensive network across Ronne Ice Shelf show significant daily ice flow variations. At all sites, the almost-synchronous horizontal displacements occur at diurnal and semidiurnal tidal periods. During spring tides, displacements, velocities and strains near the ice front have superimposed oscillations that are ±300% of their mean values and occur over a six-hour period, resulting in regular ice shelf flow reversals. Close to ice stream grounding lines, however, the horizontal diurnal and semidiurnal signals decay and almost vanish. From our analysis, we conclude that ice shelves respond primarily elastically to tidal tilting, thus accounting for the observed diurnal and semidiurnal flow variations, and their amplification toward the ice shelf front. Our findings suggest that detailed modeling of these data could provide improved ice shelf and ice stream models for correctly simulating ice shelf flow and predicting future ice sheet evolution Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf Natural Environment Research Council: NERC Open Research Archive Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Geophysical Research Letters 39 10 n/a n/a |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Recent GPS observations from a spatially extensive network across Ronne Ice Shelf show significant daily ice flow variations. At all sites, the almost-synchronous horizontal displacements occur at diurnal and semidiurnal tidal periods. During spring tides, displacements, velocities and strains near the ice front have superimposed oscillations that are ±300% of their mean values and occur over a six-hour period, resulting in regular ice shelf flow reversals. Close to ice stream grounding lines, however, the horizontal diurnal and semidiurnal signals decay and almost vanish. From our analysis, we conclude that ice shelves respond primarily elastically to tidal tilting, thus accounting for the observed diurnal and semidiurnal flow variations, and their amplification toward the ice shelf front. Our findings suggest that detailed modeling of these data could provide improved ice shelf and ice stream models for correctly simulating ice shelf flow and predicting future ice sheet evolution |
format |
Article in Journal/Newspaper |
author |
Makinson, Keith King, Matt A. Nicholls, Keith W. Gudmundsson, G. Hilmar |
spellingShingle |
Makinson, Keith King, Matt A. Nicholls, Keith W. Gudmundsson, G. Hilmar Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
author_facet |
Makinson, Keith King, Matt A. Nicholls, Keith W. Gudmundsson, G. Hilmar |
author_sort |
Makinson, Keith |
title |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_short |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_full |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_fullStr |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_full_unstemmed |
Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica |
title_sort |
diurnal and semidiurnal tide-induced lateral movement of ronne ice shelf, antarctica |
publisher |
American Geophysical Union |
publishDate |
2012 |
url |
http://nora.nerc.ac.uk/id/eprint/18612/ https://nora.nerc.ac.uk/id/eprint/18612/1/grl29179.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Ronne Ice Shelf Tilting |
geographic_facet |
Ronne Ice Shelf Tilting |
genre |
Antarc* Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf |
op_relation |
https://nora.nerc.ac.uk/id/eprint/18612/1/grl29179.pdf Makinson, Keith orcid:0000-0002-5791-1767 King, Matt A.; Nicholls, Keith W. orcid:0000-0002-2188-4509 Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 . 2012 Diurnal and semidiurnal tide-induced lateral movement of Ronne Ice Shelf, Antarctica. Geophysical Research Letters, 39, L10501. 5, pp. https://doi.org/10.1029/2012GL051636 <https://doi.org/10.1029/2012GL051636> |
op_doi |
https://doi.org/10.1029/2012GL051636 |
container_title |
Geophysical Research Letters |
container_volume |
39 |
container_issue |
10 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766216743964901376 |