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...
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Language: | English |
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Cambridge University Press
2021
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Online Access: | https://doi.org/10.1017/jog.2020.97 https://doaj.org/article/c9e51824d66842999ee4628e81bc60e9 |
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ftdoajarticles:oai:doaj.org/article:c9e51824d66842999ee4628e81bc60e9 2023-05-15T13:49:31+02:00 Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss Emily A. Hill G. Hilmar Gudmundsson J. Rachel Carr Chris R. Stokes Helen M. King 2021-02-01T00:00:00Z https://doi.org/10.1017/jog.2020.97 https://doaj.org/article/c9e51824d66842999ee4628e81bc60e9 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143020000970/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2020.97 0022-1430 1727-5652 https://doaj.org/article/c9e51824d66842999ee4628e81bc60e9 Journal of Glaciology, Vol 67, Pp 147-157 (2021) Glacier flow glacier modelling ice-shelf break-up Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2021 ftdoajarticles https://doi.org/10.1017/jog.2020.97 2023-03-12T01:30:57Z 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 hypothesize that grounded ice loss was limited by the stabilization of the grounding line at a topographic high ~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 Directory of Open Access Journals: DOAJ Articles Antarctic Greenland Journal of Glaciology 67 261 147 157 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier flow glacier modelling ice-shelf break-up Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier flow glacier modelling ice-shelf break-up Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Emily A. Hill G. Hilmar Gudmundsson J. Rachel Carr Chris R. Stokes Helen M. King Twenty-first century response of Petermann Glacier, northwest Greenland to ice shelf loss |
topic_facet |
Glacier flow glacier modelling ice-shelf break-up Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
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 hypothesize that grounded ice loss was limited by the stabilization of the grounding line at a topographic high ~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 |
Emily A. Hill G. Hilmar Gudmundsson J. Rachel Carr Chris R. Stokes Helen M. King |
author_facet |
Emily A. Hill G. Hilmar Gudmundsson J. Rachel Carr Chris R. Stokes Helen M. King |
author_sort |
Emily A. Hill |
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://doi.org/10.1017/jog.2020.97 https://doaj.org/article/c9e51824d66842999ee4628e81bc60e9 |
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_source |
Journal of Glaciology, Vol 67, Pp 147-157 (2021) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143020000970/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2020.97 0022-1430 1727-5652 https://doaj.org/article/c9e51824d66842999ee4628e81bc60e9 |
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_ |
1766251464016003072 |