Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica
The Totten Glacier in East Antarctica is of major climatic interest because of the large fluctuations in its grounding line and potential vulnerability to climate change. Here, we use a series of high-resolution, regional NEMO-LIM-based (Nucleus for European Modelling of the Ocean coupled with the L...
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Language: | English |
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ftvliz:oai:oma.vliz.be:361433 2023-05-15T13:42:51+02:00 Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica Van Achter, G. Fichefet, T. Goosse, H. Moreno-Chamarro, E. 2022 application/pdf https://www.vliz.be/imisdocs/publications/387310.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000886179600001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/tc-16-4745-2022 https://www.vliz.be/imisdocs/publications/387310.pdf info:eu-repo/semantics/openAccess %3Ci%3ECryosphere+16%2811%29%3C%2Fi%3E%3A+4745-4761.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-16-4745-2022%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-16-4745-2022%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftvliz https://doi.org/10.5194/tc-16-4745-2022 2023-03-08T23:25:23Z The Totten Glacier in East Antarctica is of major climatic interest because of the large fluctuations in its grounding line and potential vulnerability to climate change. Here, we use a series of high-resolution, regional NEMO-LIM-based (Nucleus for European Modelling of the Ocean coupled with the Louvain-la-Neuve sea ice model) experiments, which include an explicit treatment of ocean–ice shelf interactions, as well as a representation of grounded icebergs and fast ice, to investigate the changes in ocean–ice interactions in the Totten Glacier area between the recent past (1995–2014) and the end of the 21st century (2081–2100) under SSP4–4.5 climate change conditions. By the end of the 21st century, the wide areas of multiyear fast ice simulated in the recent past are replaced by small patches of first year fast ice along the coast, which decreases the total summer sea ice extent. The Antarctic Slope Current is accelerated by about 116 %, which decreases the heat exchange across the shelf and tends to reduce the ice shelf basal melt rate, but this effect is counterbalanced by the effect of the oceanic warming. As a consequence, despite the accelerated Antarctic Slope Current, the Totten ice shelf melt rate is increased by 91 % due to the intrusion of warmer water into its cavity. The representation of fast ice dampens the ice shelf melt rate increase throughout the 21st century, as the Totten ice shelf melt rate increase reaches 136 % when fast ice is not taken into account. The Moscow University ice shelf melt rate increase is even more impacted by the representation of fast ice, with a 36 % melt rate increase with fast ice, compared to a 75 % increase without a fast ice representation. This influence of the representation of fast ice in our simulations on the basal melting rate trend over the 21st century is explained by the large impact of the fast ice for present-day conditions ( ∼25 % difference in m yr −1 ), while the impact decreases significantly at the end of the 21st century ( ∼4 % difference in m yr ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Shelf Iceberg* Moscow University Ice Shelf Sea ice Totten Glacier Totten Ice Shelf Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic East Antarctica Moscow University Ice Shelf ENVELOPE(121.000,121.000,-67.000,-67.000) The Antarctic Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) The Cryosphere 16 11 4745 4761 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
The Totten Glacier in East Antarctica is of major climatic interest because of the large fluctuations in its grounding line and potential vulnerability to climate change. Here, we use a series of high-resolution, regional NEMO-LIM-based (Nucleus for European Modelling of the Ocean coupled with the Louvain-la-Neuve sea ice model) experiments, which include an explicit treatment of ocean–ice shelf interactions, as well as a representation of grounded icebergs and fast ice, to investigate the changes in ocean–ice interactions in the Totten Glacier area between the recent past (1995–2014) and the end of the 21st century (2081–2100) under SSP4–4.5 climate change conditions. By the end of the 21st century, the wide areas of multiyear fast ice simulated in the recent past are replaced by small patches of first year fast ice along the coast, which decreases the total summer sea ice extent. The Antarctic Slope Current is accelerated by about 116 %, which decreases the heat exchange across the shelf and tends to reduce the ice shelf basal melt rate, but this effect is counterbalanced by the effect of the oceanic warming. As a consequence, despite the accelerated Antarctic Slope Current, the Totten ice shelf melt rate is increased by 91 % due to the intrusion of warmer water into its cavity. The representation of fast ice dampens the ice shelf melt rate increase throughout the 21st century, as the Totten ice shelf melt rate increase reaches 136 % when fast ice is not taken into account. The Moscow University ice shelf melt rate increase is even more impacted by the representation of fast ice, with a 36 % melt rate increase with fast ice, compared to a 75 % increase without a fast ice representation. This influence of the representation of fast ice in our simulations on the basal melting rate trend over the 21st century is explained by the large impact of the fast ice for present-day conditions ( ∼25 % difference in m yr −1 ), while the impact decreases significantly at the end of the 21st century ( ∼4 % difference in m yr ... |
format |
Article in Journal/Newspaper |
author |
Van Achter, G. Fichefet, T. Goosse, H. Moreno-Chamarro, E. |
spellingShingle |
Van Achter, G. Fichefet, T. Goosse, H. Moreno-Chamarro, E. Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica |
author_facet |
Van Achter, G. Fichefet, T. Goosse, H. Moreno-Chamarro, E. |
author_sort |
Van Achter, G. |
title |
Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica |
title_short |
Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica |
title_full |
Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica |
title_fullStr |
Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica |
title_full_unstemmed |
Influence of fast ice on future ice shelf melting in the Totten Glacier area, East Antarctica |
title_sort |
influence of fast ice on future ice shelf melting in the totten glacier area, east antarctica |
publishDate |
2022 |
url |
https://www.vliz.be/imisdocs/publications/387310.pdf |
long_lat |
ENVELOPE(121.000,121.000,-67.000,-67.000) ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
Antarctic East Antarctica Moscow University Ice Shelf The Antarctic Totten Glacier |
geographic_facet |
Antarctic East Antarctica Moscow University Ice Shelf The Antarctic Totten Glacier |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Iceberg* Moscow University Ice Shelf Sea ice Totten Glacier Totten Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Iceberg* Moscow University Ice Shelf Sea ice Totten Glacier Totten Ice Shelf |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000886179600001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/tc-16-4745-2022 https://www.vliz.be/imisdocs/publications/387310.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-16-4745-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
11 |
container_start_page |
4745 |
op_container_end_page |
4761 |
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1766173525084733440 |