Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica
The Totten Glacier in East Antarctica is of major climate interest because of the large fluctuation of its grounding line and of its potential vulnerability to climate change. The ocean above the continental shelf in front of the Totten ice shelf exhibits large extents of landfast sea ice with low i...
Published in: | Ocean Modelling |
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Language: | English |
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Elsevier Inc.
2022
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Online Access: | http://hdl.handle.net/2078.1/254497 https://doi.org/10.1016/j.ocemod.2021.101920 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:254497 2024-05-12T07:53:54+00:00 Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica Van Achter, Guillian Fichefet, Thierry Goosse, Hugues Pelletier, Charles Sterlin, Jean Huot, Pierre Lemieux, Jean-François Fraser, Alexander D. Haubner, Konstanze Porter-Smith, Richard UCL - SST/ELI/ELIC - Earth & Climate 2022 http://hdl.handle.net/2078.1/254497 https://doi.org/10.1016/j.ocemod.2021.101920 eng eng Elsevier Inc. boreal:254497 http://hdl.handle.net/2078.1/254497 doi:10.1016/j.ocemod.2021.101920 urn:ISSN:1463-5003 urn:EISSN:1463-5011 info:eu-repo/semantics/openAccess Ocean Modelling, Vol. 169, p. 101920 (2022) Atmospheric Science Geotechnical Engineering and Engineering Geology Computer Science (miscellaneous) Oceanography info:eu-repo/semantics/article 2022 ftunivlouvain https://doi.org/10.1016/j.ocemod.2021.101920 2024-04-17T16:36:25Z The Totten Glacier in East Antarctica is of major climate interest because of the large fluctuation of its grounding line and of its potential vulnerability to climate change. The ocean above the continental shelf in front of the Totten ice shelf exhibits large extents of landfast sea ice with low interannual variability. Landfast sea ice is either crudely or not at all represented in current climate models. These models are potentially omitting or misrepresenting important effects related to this type of sea ice, such as its influence on coastal polynya locations. Yet, the impact of the landfast sea ice on the ocean–ice shelf interactions is poorly understood. Using a series of high-resolution, regional NEMO-LIM-based experiments, including an explicit treatment of ocean–ice shelf interactions, over the years 2001–2010, we simulate a realistic landfast sea ice extent in the area of Totten Glacier through a combination of a sea ice tensile strength parameterisation and a grounded iceberg representation. We show that the presence of landfast sea ice impacts seriously both the location of coastal polynyas and the ocean mixed layer depth along the coast, in addition to favouring the intrusion of mixed Circumpolar Deep Water into the ice shelf cavities. Depending on the local bathymetry and the landfast sea ice distribution, landfast sea ice affects ice shelf cavities differently. The Totten ice shelf melt rate is increased by 16% on average and its variance decreased by 38%, while the Moscow University ice shelf melt rate is increased by in winter. This highlights the importance of including an accurate landfast sea ice representation in regional and eventually global climate models. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Sea ice Totten Glacier Totten Ice Shelf DIAL@UCLouvain (Université catholique de Louvain) East Antarctica Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) Moscow University Ice Shelf ENVELOPE(121.000,121.000,-67.000,-67.000) Ocean Modelling 169 101920 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
Atmospheric Science Geotechnical Engineering and Engineering Geology Computer Science (miscellaneous) Oceanography |
spellingShingle |
Atmospheric Science Geotechnical Engineering and Engineering Geology Computer Science (miscellaneous) Oceanography Van Achter, Guillian Fichefet, Thierry Goosse, Hugues Pelletier, Charles Sterlin, Jean Huot, Pierre Lemieux, Jean-François Fraser, Alexander D. Haubner, Konstanze Porter-Smith, Richard Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica |
topic_facet |
Atmospheric Science Geotechnical Engineering and Engineering Geology Computer Science (miscellaneous) Oceanography |
description |
The Totten Glacier in East Antarctica is of major climate interest because of the large fluctuation of its grounding line and of its potential vulnerability to climate change. The ocean above the continental shelf in front of the Totten ice shelf exhibits large extents of landfast sea ice with low interannual variability. Landfast sea ice is either crudely or not at all represented in current climate models. These models are potentially omitting or misrepresenting important effects related to this type of sea ice, such as its influence on coastal polynya locations. Yet, the impact of the landfast sea ice on the ocean–ice shelf interactions is poorly understood. Using a series of high-resolution, regional NEMO-LIM-based experiments, including an explicit treatment of ocean–ice shelf interactions, over the years 2001–2010, we simulate a realistic landfast sea ice extent in the area of Totten Glacier through a combination of a sea ice tensile strength parameterisation and a grounded iceberg representation. We show that the presence of landfast sea ice impacts seriously both the location of coastal polynyas and the ocean mixed layer depth along the coast, in addition to favouring the intrusion of mixed Circumpolar Deep Water into the ice shelf cavities. Depending on the local bathymetry and the landfast sea ice distribution, landfast sea ice affects ice shelf cavities differently. The Totten ice shelf melt rate is increased by 16% on average and its variance decreased by 38%, while the Moscow University ice shelf melt rate is increased by in winter. This highlights the importance of including an accurate landfast sea ice representation in regional and eventually global climate models. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Van Achter, Guillian Fichefet, Thierry Goosse, Hugues Pelletier, Charles Sterlin, Jean Huot, Pierre Lemieux, Jean-François Fraser, Alexander D. Haubner, Konstanze Porter-Smith, Richard |
author_facet |
Van Achter, Guillian Fichefet, Thierry Goosse, Hugues Pelletier, Charles Sterlin, Jean Huot, Pierre Lemieux, Jean-François Fraser, Alexander D. Haubner, Konstanze Porter-Smith, Richard |
author_sort |
Van Achter, Guillian |
title |
Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica |
title_short |
Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica |
title_full |
Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica |
title_fullStr |
Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica |
title_full_unstemmed |
Modelling landfast sea ice and its influence on ocean–ice interactions in the area of the Totten Glacier, East Antarctica |
title_sort |
modelling landfast sea ice and its influence on ocean–ice interactions in the area of the totten glacier, east antarctica |
publisher |
Elsevier Inc. |
publishDate |
2022 |
url |
http://hdl.handle.net/2078.1/254497 https://doi.org/10.1016/j.ocemod.2021.101920 |
long_lat |
ENVELOPE(116.333,116.333,-66.833,-66.833) ENVELOPE(121.000,121.000,-67.000,-67.000) |
geographic |
East Antarctica Totten Glacier Moscow University Ice Shelf |
geographic_facet |
East Antarctica Totten Glacier Moscow University Ice Shelf |
genre |
Antarc* Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Sea ice Totten Glacier Totten Ice Shelf |
genre_facet |
Antarc* Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Sea ice Totten Glacier Totten Ice Shelf |
op_source |
Ocean Modelling, Vol. 169, p. 101920 (2022) |
op_relation |
boreal:254497 http://hdl.handle.net/2078.1/254497 doi:10.1016/j.ocemod.2021.101920 urn:ISSN:1463-5003 urn:EISSN:1463-5011 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.ocemod.2021.101920 |
container_title |
Ocean Modelling |
container_volume |
169 |
container_start_page |
101920 |
_version_ |
1798845470413422592 |