Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream
The Barents Sea Ice Sheet was a marine-based ice sheet, i.e., it rested on the Barents Sea floor during the Last Glacial Maximum (21 ky BP). The Bjørnøyrenna Ice Stream was the largest ice stream draining the Barents Sea Ice Sheet and is regarded as an analogue for contemporary ice streams in West A...
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Online Access: | http://hdl.handle.net/11368/2928807 https://doi.org/10.1038/s41598-018-25664-6 https://www.nature.com/articles/s41598-018-25664-6 |
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ftunitriestiris:oai:arts.units.it:11368/2928807 2023-05-15T13:47:30+02:00 Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream Petrini, Michele Colleoni, Florence Kirchner, Nina Hughes, Anna L C Camerlenghi, Angelo Rebesco, Michele Lucchi, Renata G Forte, Emanuele Colucci, Renato R Noormets, Riko Petrini, Michele Colleoni, Florence Kirchner, Nina Hughes, Anna L C Camerlenghi, Angelo Rebesco, Michele Lucchi, Renata G Forte, Emanuele Colucci, Renato R Noormets, Riko 2018 STAMPA http://hdl.handle.net/11368/2928807 https://doi.org/10.1038/s41598-018-25664-6 https://www.nature.com/articles/s41598-018-25664-6 eng eng info:eu-repo/semantics/altIdentifier/pmid/29740089 info:eu-repo/semantics/altIdentifier/wos/WOS:000431625400009 volume:8/2018 issue:1 firstpage:7196 lastpage:7204 numberofpages:9 journal:SCIENTIFIC REPORTS http://hdl.handle.net/11368/2928807 doi:10.1038/s41598-018-25664-6 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85046875591 https://www.nature.com/articles/s41598-018-25664-6 info:eu-repo/semantics/openAccess Barents ice sheet climate change glaciation ice stream info:eu-repo/semantics/article 2018 ftunitriestiris https://doi.org/10.1038/s41598-018-25664-6 2023-04-09T06:15:37Z The Barents Sea Ice Sheet was a marine-based ice sheet, i.e., it rested on the Barents Sea floor during the Last Glacial Maximum (21 ky BP). The Bjørnøyrenna Ice Stream was the largest ice stream draining the Barents Sea Ice Sheet and is regarded as an analogue for contemporary ice streams in West Antarctica. Here, the retreat of the Bjørnøyrenna Ice Stream is simulated by means of two numerical ice sheet models and results assessed against geological data. We investigate the sensitivity of the ice stream to changes in ocean temperature and the impact of grounding-line physics on ice stream retreat. Our results suggest that the role played by sub-shelf melting depends on how the grounding-line physics is represented in the models. When an analytic constraint on the ice flux across the grounding line is applied, the retreat of Bjørnøyrenna Ice Stream is primarily driven by internal ice dynamics rather than by oceanic forcing. This suggests that implementations of grounding-line physics need to be carefully assessed when evaluating and predicting the response of contemporary marine-based ice sheets and individual ice streams to ongoing and future ocean warming. Article in Journal/Newspaper Antarc* Antarctica Barents Sea Bjørnøyrenna ice stream Ice Sheet Sea ice West Antarctica Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) Barents Sea West Antarctica Scientific Reports 8 1 |
institution |
Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
Barents ice sheet climate change glaciation ice stream |
spellingShingle |
Barents ice sheet climate change glaciation ice stream Petrini, Michele Colleoni, Florence Kirchner, Nina Hughes, Anna L C Camerlenghi, Angelo Rebesco, Michele Lucchi, Renata G Forte, Emanuele Colucci, Renato R Noormets, Riko Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
topic_facet |
Barents ice sheet climate change glaciation ice stream |
description |
The Barents Sea Ice Sheet was a marine-based ice sheet, i.e., it rested on the Barents Sea floor during the Last Glacial Maximum (21 ky BP). The Bjørnøyrenna Ice Stream was the largest ice stream draining the Barents Sea Ice Sheet and is regarded as an analogue for contemporary ice streams in West Antarctica. Here, the retreat of the Bjørnøyrenna Ice Stream is simulated by means of two numerical ice sheet models and results assessed against geological data. We investigate the sensitivity of the ice stream to changes in ocean temperature and the impact of grounding-line physics on ice stream retreat. Our results suggest that the role played by sub-shelf melting depends on how the grounding-line physics is represented in the models. When an analytic constraint on the ice flux across the grounding line is applied, the retreat of Bjørnøyrenna Ice Stream is primarily driven by internal ice dynamics rather than by oceanic forcing. This suggests that implementations of grounding-line physics need to be carefully assessed when evaluating and predicting the response of contemporary marine-based ice sheets and individual ice streams to ongoing and future ocean warming. |
author2 |
Petrini, Michele Colleoni, Florence Kirchner, Nina Hughes, Anna L C Camerlenghi, Angelo Rebesco, Michele Lucchi, Renata G Forte, Emanuele Colucci, Renato R Noormets, Riko |
format |
Article in Journal/Newspaper |
author |
Petrini, Michele Colleoni, Florence Kirchner, Nina Hughes, Anna L C Camerlenghi, Angelo Rebesco, Michele Lucchi, Renata G Forte, Emanuele Colucci, Renato R Noormets, Riko |
author_facet |
Petrini, Michele Colleoni, Florence Kirchner, Nina Hughes, Anna L C Camerlenghi, Angelo Rebesco, Michele Lucchi, Renata G Forte, Emanuele Colucci, Renato R Noormets, Riko |
author_sort |
Petrini, Michele |
title |
Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
title_short |
Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
title_full |
Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
title_fullStr |
Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
title_full_unstemmed |
Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
title_sort |
interplay of grounding-line dynamics and sub-shelf melting during retreat of the bjørnøyrenna ice stream |
publishDate |
2018 |
url |
http://hdl.handle.net/11368/2928807 https://doi.org/10.1038/s41598-018-25664-6 https://www.nature.com/articles/s41598-018-25664-6 |
geographic |
Barents Sea West Antarctica |
geographic_facet |
Barents Sea West Antarctica |
genre |
Antarc* Antarctica Barents Sea Bjørnøyrenna ice stream Ice Sheet Sea ice West Antarctica |
genre_facet |
Antarc* Antarctica Barents Sea Bjørnøyrenna ice stream Ice Sheet Sea ice West Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/29740089 info:eu-repo/semantics/altIdentifier/wos/WOS:000431625400009 volume:8/2018 issue:1 firstpage:7196 lastpage:7204 numberofpages:9 journal:SCIENTIFIC REPORTS http://hdl.handle.net/11368/2928807 doi:10.1038/s41598-018-25664-6 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85046875591 https://www.nature.com/articles/s41598-018-25664-6 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-018-25664-6 |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766247251453149184 |