Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica
An extensive set of shore-parallel fractures are observed at the grounding line of Kamb Ice Stream (KIS) in West Antarctica. Seismicity measured in the grounding zone is, as elsewhere around Antarctica, tidally forced and moreover strand cracks propagate nearly exclusively on the falling tide. Measu...
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Cambridge University Press
2016
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ftdoajarticles:oai:doaj.org/article:4f78c2a7bc3340fd8337c4958796912f 2023-05-15T13:41:40+02:00 Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica CHRISTINA L. HULBE MARIN KLINGER MEGAN MASTERSON GINNY CATANIA KENNETH CRUIKSHANK ANDREA BUGNI 2016-10-01T00:00:00Z https://doi.org/10.1017/jog.2016.74 https://doaj.org/article/4f78c2a7bc3340fd8337c4958796912f EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143016000745/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2016.74 0022-1430 1727-5652 https://doaj.org/article/4f78c2a7bc3340fd8337c4958796912f Journal of Glaciology, Vol 62, Pp 816-824 (2016) grounding line ice fracture propagation ice shelves Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2016 ftdoajarticles https://doi.org/10.1017/jog.2016.74 2023-03-12T01:30:59Z An extensive set of shore-parallel fractures are observed at the grounding line of Kamb Ice Stream (KIS) in West Antarctica. Seismicity measured in the grounding zone is, as elsewhere around Antarctica, tidally forced and moreover strand cracks propagate nearly exclusively on the falling tide. Measured surface deflection and a model of fracture propagation are used to conclude that bending on the falling tide favors propagation while bending on the rising tide suppresses propagation. Without the perturbation due to tidal bending, strand cracks would be rare and appear farther downstream than observed. We speculate that the very large number of cracks observed at KIS is due to the stagnant-to-floating transition at that grounding line, which allows cyclic bending of the same ice and relatively large stretching rates. Article in Journal/Newspaper Antarc* Antarctica Ice Shelves Journal of Glaciology Kamb Ice Stream West Antarctica Directory of Open Access Journals: DOAJ Articles Kamb Ice Stream ENVELOPE(-145.000,-145.000,-82.250,-82.250) West Antarctica Journal of Glaciology 62 235 816 824 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
grounding line ice fracture propagation ice shelves Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
grounding line ice fracture propagation ice shelves Environmental sciences GE1-350 Meteorology. Climatology QC851-999 CHRISTINA L. HULBE MARIN KLINGER MEGAN MASTERSON GINNY CATANIA KENNETH CRUIKSHANK ANDREA BUGNI Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica |
topic_facet |
grounding line ice fracture propagation ice shelves Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
An extensive set of shore-parallel fractures are observed at the grounding line of Kamb Ice Stream (KIS) in West Antarctica. Seismicity measured in the grounding zone is, as elsewhere around Antarctica, tidally forced and moreover strand cracks propagate nearly exclusively on the falling tide. Measured surface deflection and a model of fracture propagation are used to conclude that bending on the falling tide favors propagation while bending on the rising tide suppresses propagation. Without the perturbation due to tidal bending, strand cracks would be rare and appear farther downstream than observed. We speculate that the very large number of cracks observed at KIS is due to the stagnant-to-floating transition at that grounding line, which allows cyclic bending of the same ice and relatively large stretching rates. |
format |
Article in Journal/Newspaper |
author |
CHRISTINA L. HULBE MARIN KLINGER MEGAN MASTERSON GINNY CATANIA KENNETH CRUIKSHANK ANDREA BUGNI |
author_facet |
CHRISTINA L. HULBE MARIN KLINGER MEGAN MASTERSON GINNY CATANIA KENNETH CRUIKSHANK ANDREA BUGNI |
author_sort |
CHRISTINA L. HULBE |
title |
Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica |
title_short |
Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica |
title_full |
Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica |
title_fullStr |
Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica |
title_full_unstemmed |
Tidal bending and strand cracks at the Kamb Ice Stream grounding line, West Antarctica |
title_sort |
tidal bending and strand cracks at the kamb ice stream grounding line, west antarctica |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
https://doi.org/10.1017/jog.2016.74 https://doaj.org/article/4f78c2a7bc3340fd8337c4958796912f |
long_lat |
ENVELOPE(-145.000,-145.000,-82.250,-82.250) |
geographic |
Kamb Ice Stream West Antarctica |
geographic_facet |
Kamb Ice Stream West Antarctica |
genre |
Antarc* Antarctica Ice Shelves Journal of Glaciology Kamb Ice Stream West Antarctica |
genre_facet |
Antarc* Antarctica Ice Shelves Journal of Glaciology Kamb Ice Stream West Antarctica |
op_source |
Journal of Glaciology, Vol 62, Pp 816-824 (2016) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143016000745/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2016.74 0022-1430 1727-5652 https://doaj.org/article/4f78c2a7bc3340fd8337c4958796912f |
op_doi |
https://doi.org/10.1017/jog.2016.74 |
container_title |
Journal of Glaciology |
container_volume |
62 |
container_issue |
235 |
container_start_page |
816 |
op_container_end_page |
824 |
_version_ |
1766153670326484992 |