Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss
Ice shelves restrain flow from the Greenland and Antarctic ice sheets. Climate-ocean warming could force thinning or collapse of floating ice shelves and subsequently accelerate flow, increase ice discharge, and raise global mean sea levels. Petermann Glacier (PG), northwest Greenland, recently lost...
Published in: | Journal of Glaciology |
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Cambridge University Press
2021
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/44607/ https://doi.org/10.1017/jog.2020.97 https://nrl.northumbria.ac.uk/id/eprint/44607/9/twenty-first-century-response-of-petermann-glacier-northwest-greenland-to-ice-shelf-loss.pdf https://nrl.northumbria.ac.uk/id/eprint/44607/1/King%202020.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:44607 2023-05-15T13:44:52+02:00 Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss Hill, Emily Gudmundsson, Hilmar Carr, Rachel Stokes, Chris R. King, Helen 2021-02-01 text https://nrl.northumbria.ac.uk/id/eprint/44607/ https://doi.org/10.1017/jog.2020.97 https://nrl.northumbria.ac.uk/id/eprint/44607/9/twenty-first-century-response-of-petermann-glacier-northwest-greenland-to-ice-shelf-loss.pdf https://nrl.northumbria.ac.uk/id/eprint/44607/1/King%202020.pdf en eng Cambridge University Press https://nrl.northumbria.ac.uk/id/eprint/44607/9/twenty-first-century-response-of-petermann-glacier-northwest-greenland-to-ice-shelf-loss.pdf https://nrl.northumbria.ac.uk/id/eprint/44607/1/King%202020.pdf Hill, Emily, Gudmundsson, Hilmar, Carr, Rachel, Stokes, Chris R. and King, Helen (2021) Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss. Journal of Glaciology, 67 (261). pp. 147-157. ISSN 0022-1430 cc_by_4_0 CC-BY F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2021 ftunivnorthumb https://doi.org/10.1017/jog.2020.97 2022-09-25T06:12:53Z Ice shelves restrain flow from the Greenland and Antarctic ice sheets. Climate-ocean warming could force thinning or collapse of floating ice shelves and subsequently accelerate flow, increase ice discharge, and raise global mean sea levels. Petermann Glacier (PG), northwest Greenland, recently lost large sections of its ice shelf, but its response to total ice shelf loss in the future remains uncertain. Here, we use the ice flow model Úa to assess the sensitivity of PG to changes in ice shelf extent, and to estimate the resultant loss of grounded ice and contribution to sea level rise. Our results have shown that under several scenarios of ice shelf thinning and retreat, removal of the shelf will not contribute substantially to global mean sea level (< 1 mm). We hypothesise that grounded ice loss was limited by the stabilization of the grounding line at a topographic high approximately 12 km inland of its current grounding line position. Further inland, the likelihood of a narrow fjord that slopes seawards suggests that PG is likely to remain insensitive to terminus changes in the near future. Article in Journal/Newspaper Antarc* Antarctic glacier Greenland Ice Shelf Ice Shelves Journal of Glaciology Petermann glacier Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic Greenland Journal of Glaciology 67 261 147 157 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Hill, Emily Gudmundsson, Hilmar Carr, Rachel Stokes, Chris R. King, Helen Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Ice shelves restrain flow from the Greenland and Antarctic ice sheets. Climate-ocean warming could force thinning or collapse of floating ice shelves and subsequently accelerate flow, increase ice discharge, and raise global mean sea levels. Petermann Glacier (PG), northwest Greenland, recently lost large sections of its ice shelf, but its response to total ice shelf loss in the future remains uncertain. Here, we use the ice flow model Úa to assess the sensitivity of PG to changes in ice shelf extent, and to estimate the resultant loss of grounded ice and contribution to sea level rise. Our results have shown that under several scenarios of ice shelf thinning and retreat, removal of the shelf will not contribute substantially to global mean sea level (< 1 mm). We hypothesise that grounded ice loss was limited by the stabilization of the grounding line at a topographic high approximately 12 km inland of its current grounding line position. Further inland, the likelihood of a narrow fjord that slopes seawards suggests that PG is likely to remain insensitive to terminus changes in the near future. |
format |
Article in Journal/Newspaper |
author |
Hill, Emily Gudmundsson, Hilmar Carr, Rachel Stokes, Chris R. King, Helen |
author_facet |
Hill, Emily Gudmundsson, Hilmar Carr, Rachel Stokes, Chris R. King, Helen |
author_sort |
Hill, Emily |
title |
Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
title_short |
Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
title_full |
Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
title_fullStr |
Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
title_full_unstemmed |
Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
title_sort |
twenty-first century response of petermann glacier, northwest greenland to ice shelf loss |
publisher |
Cambridge University Press |
publishDate |
2021 |
url |
https://nrl.northumbria.ac.uk/id/eprint/44607/ https://doi.org/10.1017/jog.2020.97 https://nrl.northumbria.ac.uk/id/eprint/44607/9/twenty-first-century-response-of-petermann-glacier-northwest-greenland-to-ice-shelf-loss.pdf https://nrl.northumbria.ac.uk/id/eprint/44607/1/King%202020.pdf |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic glacier Greenland Ice Shelf Ice Shelves Journal of Glaciology Petermann glacier |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Shelf Ice Shelves Journal of Glaciology Petermann glacier |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/44607/9/twenty-first-century-response-of-petermann-glacier-northwest-greenland-to-ice-shelf-loss.pdf https://nrl.northumbria.ac.uk/id/eprint/44607/1/King%202020.pdf Hill, Emily, Gudmundsson, Hilmar, Carr, Rachel, Stokes, Chris R. and King, Helen (2021) Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss. Journal of Glaciology, 67 (261). pp. 147-157. ISSN 0022-1430 |
op_rights |
cc_by_4_0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/jog.2020.97 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
261 |
container_start_page |
147 |
op_container_end_page |
157 |
_version_ |
1766207833675661312 |