Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream
Abstract 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...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Portfolio
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1038/s41598-018-25664-6 https://doaj.org/article/0142988d9e2143e9a6179ea6734ac79f |
id |
ftdoajarticles:oai:doaj.org/article:0142988d9e2143e9a6179ea6734ac79f |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:0142988d9e2143e9a6179ea6734ac79f 2023-05-15T13:38:50+02:00 Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream Michele Petrini Florence Colleoni Nina Kirchner Anna L. C. Hughes Angelo Camerlenghi Michele Rebesco Renata G. Lucchi Emanuele Forte Renato R. Colucci Riko Noormets 2018-05-01T00:00:00Z https://doi.org/10.1038/s41598-018-25664-6 https://doaj.org/article/0142988d9e2143e9a6179ea6734ac79f EN eng Nature Portfolio https://doi.org/10.1038/s41598-018-25664-6 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-018-25664-6 2045-2322 https://doaj.org/article/0142988d9e2143e9a6179ea6734ac79f Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018) Medicine R Science Q article 2018 ftdoajarticles https://doi.org/10.1038/s41598-018-25664-6 2022-12-31T13:55:11Z Abstract 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 Directory of Open Access Journals: DOAJ Articles Barents Sea West Antarctica Scientific Reports 8 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Michele Petrini Florence Colleoni Nina Kirchner Anna L. C. Hughes Angelo Camerlenghi Michele Rebesco Renata G. Lucchi Emanuele Forte Renato R. Colucci Riko Noormets Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream |
topic_facet |
Medicine R Science Q |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Michele Petrini Florence Colleoni Nina Kirchner Anna L. C. Hughes Angelo Camerlenghi Michele Rebesco Renata G. Lucchi Emanuele Forte Renato R. Colucci Riko Noormets |
author_facet |
Michele Petrini Florence Colleoni Nina Kirchner Anna L. C. Hughes Angelo Camerlenghi Michele Rebesco Renata G. Lucchi Emanuele Forte Renato R. Colucci Riko Noormets |
author_sort |
Michele Petrini |
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 |
publisher |
Nature Portfolio |
publishDate |
2018 |
url |
https://doi.org/10.1038/s41598-018-25664-6 https://doaj.org/article/0142988d9e2143e9a6179ea6734ac79f |
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_source |
Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018) |
op_relation |
https://doi.org/10.1038/s41598-018-25664-6 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-018-25664-6 2045-2322 https://doaj.org/article/0142988d9e2143e9a6179ea6734ac79f |
op_doi |
https://doi.org/10.1038/s41598-018-25664-6 |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766111564319948800 |