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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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00001254 2023-05-15T16:03:50+02:00 Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 Tabone, Ilaria Robinson, Alexander Alvarez-Solas, Jorge Montoya, Marisa 2019-07 electronic https://doi.org/10.5194/tc-13-1911-2019 https://noa.gwlb.de/receive/cop_mods_00001254 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00001216/tc-13-1911-2019.pdf https://tc.copernicus.org/articles/13/1911/2019/tc-13-1911-2019.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-13-1911-2019 https://noa.gwlb.de/receive/cop_mods_00001254 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00001216/tc-13-1911-2019.pdf https://tc.copernicus.org/articles/13/1911/2019/tc-13-1911-2019.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2019 ftnonlinearchiv https://doi.org/10.5194/tc-13-1911-2019 2022-02-08T23:01:56Z 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 Niedersächsisches Online-Archiv NOA Greenland The Cryosphere 13 7 1911 1923 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Tabone, Ilaria Robinson, Alexander Alvarez-Solas, Jorge Montoya, Marisa Submarine melt as a potential trigger of the North East Greenland Ice Stream margin retreat during Marine Isotope Stage 3 |
topic_facet |
article Verlagsveröffentlichung |
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 |
Tabone, Ilaria Robinson, Alexander Alvarez-Solas, Jorge Montoya, Marisa |
author_facet |
Tabone, Ilaria Robinson, Alexander Alvarez-Solas, Jorge Montoya, Marisa |
author_sort |
Tabone, Ilaria |
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://noa.gwlb.de/receive/cop_mods_00001254 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00001216/tc-13-1911-2019.pdf https://tc.copernicus.org/articles/13/1911/2019/tc-13-1911-2019.pdf |
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_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-13-1911-2019 https://noa.gwlb.de/receive/cop_mods_00001254 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00001216/tc-13-1911-2019.pdf https://tc.copernicus.org/articles/13/1911/2019/tc-13-1911-2019.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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_ |
1766399522498412544 |