Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3
The Northeast Greenland Ice Stream (NEGIS) has been suffering a significant ice mass loss during the last decades. This is partly due to increasing oceanic temperatures in the subpolar North Atlantic, which enhance submarine basal melting and mass discharge. This demonstrates the high sensitivity of...
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2019
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Online Access: | https://doi.org/10.5194/tc-13-1911-2019 https://doaj.org/article/0248f7b4fe9a46fb9e9e9c2a97145f7d |
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ftdoajarticles:oai:doaj.org/article:0248f7b4fe9a46fb9e9e9c2a97145f7d 2023-05-15T16:03:49+02:00 Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 I. Tabone A. Robinson J. Alvarez-Solas M. Montoya 2019-07-01T00:00:00Z https://doi.org/10.5194/tc-13-1911-2019 https://doaj.org/article/0248f7b4fe9a46fb9e9e9c2a97145f7d EN eng Copernicus Publications https://www.the-cryosphere.net/13/1911/2019/tc-13-1911-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-1911-2019 1994-0416 1994-0424 https://doaj.org/article/0248f7b4fe9a46fb9e9e9c2a97145f7d The Cryosphere, Vol 13, Pp 1911-1923 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-1911-2019 2022-12-31T11:56:43Z The Northeast Greenland Ice Stream (NEGIS) has been suffering a significant ice mass loss during the last decades. This is partly due to increasing oceanic temperatures in the subpolar North Atlantic, which enhance submarine basal melting and mass discharge. This demonstrates the high sensitivity of this region to oceanic changes. In addition, a recent study suggested that the NEGIS grounding line was 20–40 km behind its present-day location for 15 ka during Marine Isotope Stage (MIS) 3. This is in contrast with Greenland temperature records indicating cold atmospheric conditions at that time, expected to favour ice-sheet expansion. To explain this anomalous retreat a combination of atmospheric and external forcings has been invoked. Yet, as the ocean is found to be a primary driver of the ongoing retreat of the NEGIS glaciers, the effect of past oceanic changes in their paleo evolution cannot be ruled out and should be explored in detail. Here we investigate the sensitivity of the NEGIS to the oceanic forcing during the last glacial period using a three-dimensional hybrid ice-sheet–shelf model. We find that a sufficiently high oceanic forcing could account for a NEGIS ice-margin retreat of several tens of kilometres, potentially explaining the recently proposed NEGIS grounding-line retreat during Marine Isotope Stage 3. Article in Journal/Newspaper East Greenland Greenland Ice Sheet North Atlantic The Cryosphere Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 13 7 1911 1923 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 I. Tabone A. Robinson J. Alvarez-Solas M. Montoya Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The Northeast Greenland Ice Stream (NEGIS) has been suffering a significant ice mass loss during the last decades. This is partly due to increasing oceanic temperatures in the subpolar North Atlantic, which enhance submarine basal melting and mass discharge. This demonstrates the high sensitivity of this region to oceanic changes. In addition, a recent study suggested that the NEGIS grounding line was 20–40 km behind its present-day location for 15 ka during Marine Isotope Stage (MIS) 3. This is in contrast with Greenland temperature records indicating cold atmospheric conditions at that time, expected to favour ice-sheet expansion. To explain this anomalous retreat a combination of atmospheric and external forcings has been invoked. Yet, as the ocean is found to be a primary driver of the ongoing retreat of the NEGIS glaciers, the effect of past oceanic changes in their paleo evolution cannot be ruled out and should be explored in detail. Here we investigate the sensitivity of the NEGIS to the oceanic forcing during the last glacial period using a three-dimensional hybrid ice-sheet–shelf model. We find that a sufficiently high oceanic forcing could account for a NEGIS ice-margin retreat of several tens of kilometres, potentially explaining the recently proposed NEGIS grounding-line retreat during Marine Isotope Stage 3. |
format |
Article in Journal/Newspaper |
author |
I. Tabone A. Robinson J. Alvarez-Solas M. Montoya |
author_facet |
I. Tabone A. Robinson J. Alvarez-Solas M. Montoya |
author_sort |
I. Tabone |
title |
Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
title_short |
Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
title_full |
Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
title_fullStr |
Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
title_full_unstemmed |
Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
title_sort |
submarine melt as a potential trigger of the north east greenland ice stream margin retreat during marine isotope stage 3 |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-1911-2019 https://doaj.org/article/0248f7b4fe9a46fb9e9e9c2a97145f7d |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland Ice Sheet North Atlantic The Cryosphere |
genre_facet |
East Greenland Greenland Ice Sheet North Atlantic The Cryosphere |
op_source |
The Cryosphere, Vol 13, Pp 1911-1923 (2019) |
op_relation |
https://www.the-cryosphere.net/13/1911/2019/tc-13-1911-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-1911-2019 1994-0416 1994-0424 https://doaj.org/article/0248f7b4fe9a46fb9e9e9c2a97145f7d |
op_doi |
https://doi.org/10.5194/tc-13-1911-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
7 |
container_start_page |
1911 |
op_container_end_page |
1923 |
_version_ |
1766399515815837696 |