Future sea-level rise from Greenland's main outlet glaciers in a warming climate.
Over the past decade, ice loss from the Greenland Ice Sheet increased as a result of both increased surface melting and ice discharge to the ocean. The latter is controlled by the acceleration of ice flow and subsequent thinning of fast-flowing marine-terminating outlet glaciers. Quantifying the fut...
Main Authors: | , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/143850 https://dipot.ulb.ac.be/dspace/bitstream/2013/143850/1/nature12068.pdf |
id |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/143850 |
---|---|
record_format |
openpolar |
spelling |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/143850 2023-05-15T16:21:17+02:00 Future sea-level rise from Greenland's main outlet glaciers in a warming climate. Nick, Faezeh Vieli, Andreas Andersen, Morten Langer Joughin, Ian R. Payne, Antony Edwards, Tamsin L Pattyn, Frank van de Wal, Roderik S W 2013-05 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/143850 https://dipot.ulb.ac.be/dspace/bitstream/2013/143850/1/nature12068.pdf en eng uri/info:doi/10.1038/nature12068 uri/info:pii/nature12068 uri/info:pmid/23657350 uri/info:scp/84877745080 https://dipot.ulb.ac.be/dspace/bitstream/2013/143850/1/nature12068.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/143850 1 full-text file(s): info:eu-repo/semantics/closedAccess Nature (London), 497 (7448 Mécanique des milieux continus Glaciologie Géodésie appliquée topographie [géodésie] Climatologie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2013 ftunivbruxelles 2022-06-12T22:09:17Z Over the past decade, ice loss from the Greenland Ice Sheet increased as a result of both increased surface melting and ice discharge to the ocean. The latter is controlled by the acceleration of ice flow and subsequent thinning of fast-flowing marine-terminating outlet glaciers. Quantifying the future dynamic contribution of such glaciers to sea-level rise (SLR) remains a major challenge because outlet glacier dynamics are poorly understood. Here we present a glacier flow model that includes a fully dynamic treatment of marine termini. We use this model to simulate behaviour of four major marine-terminating outlet glaciers, which collectively drain about 22 per cent of the Greenland Ice Sheet. Using atmospheric and oceanic forcing from a mid-range future warming scenario that predicts warming by 2.8 degrees Celsius by 2100, we project a contribution of 19 to 30 millimetres to SLR from these glaciers by 2200. This contribution is largely (80 per cent) dynamic in origin and is caused by several episodic retreats past overdeepenings in outlet glacier troughs. After initial increases, however, dynamic losses from these four outlets remain relatively constant and contribute to SLR individually at rates of about 0.01 to 0.06 millimetres per year. These rates correspond to ice fluxes that are less than twice those of the late 1990s, well below previous upper bounds. For a more extreme future warming scenario (warming by 4.5 degrees Celsius by 2100), the projected losses increase by more than 50 per cent, producing a cumulative SLR of 29 to 49 millimetres by 2200. Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper glacier Greenland Ice Sheet DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Géodésie ENVELOPE(139.846,139.846,-66.675,-66.675) Greenland |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Mécanique des milieux continus Glaciologie Géodésie appliquée topographie [géodésie] Climatologie |
spellingShingle |
Mécanique des milieux continus Glaciologie Géodésie appliquée topographie [géodésie] Climatologie Nick, Faezeh Vieli, Andreas Andersen, Morten Langer Joughin, Ian R. Payne, Antony Edwards, Tamsin L Pattyn, Frank van de Wal, Roderik S W Future sea-level rise from Greenland's main outlet glaciers in a warming climate. |
topic_facet |
Mécanique des milieux continus Glaciologie Géodésie appliquée topographie [géodésie] Climatologie |
description |
Over the past decade, ice loss from the Greenland Ice Sheet increased as a result of both increased surface melting and ice discharge to the ocean. The latter is controlled by the acceleration of ice flow and subsequent thinning of fast-flowing marine-terminating outlet glaciers. Quantifying the future dynamic contribution of such glaciers to sea-level rise (SLR) remains a major challenge because outlet glacier dynamics are poorly understood. Here we present a glacier flow model that includes a fully dynamic treatment of marine termini. We use this model to simulate behaviour of four major marine-terminating outlet glaciers, which collectively drain about 22 per cent of the Greenland Ice Sheet. Using atmospheric and oceanic forcing from a mid-range future warming scenario that predicts warming by 2.8 degrees Celsius by 2100, we project a contribution of 19 to 30 millimetres to SLR from these glaciers by 2200. This contribution is largely (80 per cent) dynamic in origin and is caused by several episodic retreats past overdeepenings in outlet glacier troughs. After initial increases, however, dynamic losses from these four outlets remain relatively constant and contribute to SLR individually at rates of about 0.01 to 0.06 millimetres per year. These rates correspond to ice fluxes that are less than twice those of the late 1990s, well below previous upper bounds. For a more extreme future warming scenario (warming by 4.5 degrees Celsius by 2100), the projected losses increase by more than 50 per cent, producing a cumulative SLR of 29 to 49 millimetres by 2200. Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Nick, Faezeh Vieli, Andreas Andersen, Morten Langer Joughin, Ian R. Payne, Antony Edwards, Tamsin L Pattyn, Frank van de Wal, Roderik S W |
author_facet |
Nick, Faezeh Vieli, Andreas Andersen, Morten Langer Joughin, Ian R. Payne, Antony Edwards, Tamsin L Pattyn, Frank van de Wal, Roderik S W |
author_sort |
Nick, Faezeh |
title |
Future sea-level rise from Greenland's main outlet glaciers in a warming climate. |
title_short |
Future sea-level rise from Greenland's main outlet glaciers in a warming climate. |
title_full |
Future sea-level rise from Greenland's main outlet glaciers in a warming climate. |
title_fullStr |
Future sea-level rise from Greenland's main outlet glaciers in a warming climate. |
title_full_unstemmed |
Future sea-level rise from Greenland's main outlet glaciers in a warming climate. |
title_sort |
future sea-level rise from greenland's main outlet glaciers in a warming climate. |
publishDate |
2013 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/143850 https://dipot.ulb.ac.be/dspace/bitstream/2013/143850/1/nature12068.pdf |
long_lat |
ENVELOPE(139.846,139.846,-66.675,-66.675) |
geographic |
Géodésie Greenland |
geographic_facet |
Géodésie Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
Nature (London), 497 (7448 |
op_relation |
uri/info:doi/10.1038/nature12068 uri/info:pii/nature12068 uri/info:pmid/23657350 uri/info:scp/84877745080 https://dipot.ulb.ac.be/dspace/bitstream/2013/143850/1/nature12068.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/143850 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/closedAccess |
_version_ |
1766009289828204544 |