Bathymetric controls on calving processes at Pine Island Glacier
Pine Island Glacier is the largest current Antarctic contributor to sea-level rise. Its ice loss has substantially increased over the last 25 years through thinning, acceleration and grounding line retreat. However, the calving line positions of the stabilising ice shelf did not show any trend withi...
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ftcopernicus:oai:publications.copernicus.org:tc63613 2023-05-15T13:55:28+02:00 Bathymetric controls on calving processes at Pine Island Glacier Arndt, Jan Erik Larter, Robert D. Friedl, Peter Gohl, Karsten Höppner, Kathrin the Science Team of Expedition PS104 2019-01-08 application/pdf https://doi.org/10.5194/tc-12-2039-2018 https://tc.copernicus.org/articles/12/2039/2018/ eng eng doi:10.5194/tc-12-2039-2018 https://tc.copernicus.org/articles/12/2039/2018/ eISSN: 1994-0424 Text 2019 ftcopernicus https://doi.org/10.5194/tc-12-2039-2018 2020-07-20T16:23:15Z Pine Island Glacier is the largest current Antarctic contributor to sea-level rise. Its ice loss has substantially increased over the last 25 years through thinning, acceleration and grounding line retreat. However, the calving line positions of the stabilising ice shelf did not show any trend within the observational record (last 70 years) until calving in 2015 led to unprecedented retreat and changed the alignment of the calving front. Bathymetric surveying revealed a ridge below the former ice shelf and two shallower highs to the north. Satellite imagery shows that ice contact on the ridge was likely lost in 2006 but was followed by intermittent contact resulting in back stress fluctuations on the ice shelf. Continuing ice-shelf flow also led to occasional ice-shelf contact with the northern bathymetric highs, which initiated rift formation that led to calving. The observations show that bathymetry is an important factor in initiating calving events. Text Antarc* Antarctic Ice Shelf Pine Island Glacier Copernicus Publications: E-Journals Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Cryosphere 12 6 2039 2050 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Pine Island Glacier is the largest current Antarctic contributor to sea-level rise. Its ice loss has substantially increased over the last 25 years through thinning, acceleration and grounding line retreat. However, the calving line positions of the stabilising ice shelf did not show any trend within the observational record (last 70 years) until calving in 2015 led to unprecedented retreat and changed the alignment of the calving front. Bathymetric surveying revealed a ridge below the former ice shelf and two shallower highs to the north. Satellite imagery shows that ice contact on the ridge was likely lost in 2006 but was followed by intermittent contact resulting in back stress fluctuations on the ice shelf. Continuing ice-shelf flow also led to occasional ice-shelf contact with the northern bathymetric highs, which initiated rift formation that led to calving. The observations show that bathymetry is an important factor in initiating calving events. |
format |
Text |
author |
Arndt, Jan Erik Larter, Robert D. Friedl, Peter Gohl, Karsten Höppner, Kathrin the Science Team of Expedition PS104 |
spellingShingle |
Arndt, Jan Erik Larter, Robert D. Friedl, Peter Gohl, Karsten Höppner, Kathrin the Science Team of Expedition PS104 Bathymetric controls on calving processes at Pine Island Glacier |
author_facet |
Arndt, Jan Erik Larter, Robert D. Friedl, Peter Gohl, Karsten Höppner, Kathrin the Science Team of Expedition PS104 |
author_sort |
Arndt, Jan Erik |
title |
Bathymetric controls on calving processes at Pine Island Glacier |
title_short |
Bathymetric controls on calving processes at Pine Island Glacier |
title_full |
Bathymetric controls on calving processes at Pine Island Glacier |
title_fullStr |
Bathymetric controls on calving processes at Pine Island Glacier |
title_full_unstemmed |
Bathymetric controls on calving processes at Pine Island Glacier |
title_sort |
bathymetric controls on calving processes at pine island glacier |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-12-2039-2018 https://tc.copernicus.org/articles/12/2039/2018/ |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Pine Island Glacier |
geographic_facet |
Antarctic Pine Island Glacier |
genre |
Antarc* Antarctic Ice Shelf Pine Island Glacier |
genre_facet |
Antarc* Antarctic Ice Shelf Pine Island Glacier |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-12-2039-2018 https://tc.copernicus.org/articles/12/2039/2018/ |
op_doi |
https://doi.org/10.5194/tc-12-2039-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
6 |
container_start_page |
2039 |
op_container_end_page |
2050 |
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1766262131721764864 |