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 wi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-06-01
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| Series: | The Cryosphere |
| Online Access: | https://www.the-cryosphere.net/12/2039/2018/tc-12-2039-2018.pdf |
| _version_ | 1819319450233470976 |
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| author | J. E. Arndt R. D. Larter P. Friedl K. Gohl K. Höppner the Science Team of Expedition PS104 |
| author_facet | J. E. Arndt R. D. Larter P. Friedl K. Gohl K. Höppner the Science Team of Expedition PS104 |
| author_sort | J. E. Arndt |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-24T11:03:53Z |
| format | Article |
| id | doaj.art-681723af0d884291bc7ac7577d540ec4 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-12-24T11:03:53Z |
| publishDate | 2018-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-681723af0d884291bc7ac7577d540ec42022-12-21T16:58:39ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242018-06-01122039205010.5194/tc-12-2039-2018Bathymetric controls on calving processes at Pine Island GlacierJ. E. Arndt0R. D. Larter1P. Friedl2K. Gohl3K. Höppner4the Science Team of Expedition PS1045Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, GermanyBritish Antarctic Survey, High Cross Madingley Road, Cambridge, CB3 0ET, UKGerman Aerospace Center (DLR), German Remote Sensing Data Center, Oberpfaffenhofen, Münchener Str. 20, 82234 Wessling, GermanyAlfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, GermanyGerman Aerospace Center (DLR), German Remote Sensing Data Center, Oberpfaffenhofen, Münchener Str. 20, 82234 Wessling, GermanyA full list of authors and their affiliations appears at the end of the paper.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.https://www.the-cryosphere.net/12/2039/2018/tc-12-2039-2018.pdf |
| spellingShingle | J. E. Arndt R. D. Larter P. Friedl K. Gohl K. Höppner the Science Team of Expedition PS104 Bathymetric controls on calving processes at Pine Island Glacier The Cryosphere |
| title | 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_short | Bathymetric controls on calving processes at Pine Island Glacier |
| title_sort | bathymetric controls on calving processes at pine island glacier |
| url | https://www.the-cryosphere.net/12/2039/2018/tc-12-2039-2018.pdf |
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