Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop
Abstract The 2016 Antarctic sea ice extent (SIE) drop was a rapid decrease that led to persistent low sea ice conditions. The event was triggered by atmospheric anomalies, but the potential preconditioning role of the ocean is unsettled. Here, we use sensitivity experiments with a fully-coupled regi...
Published in: | Environmental Research: Climate |
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Online Access: | http://dx.doi.org/10.1088/2752-5295/ad3a0b https://iopscience.iop.org/article/10.1088/2752-5295/ad3a0b https://iopscience.iop.org/article/10.1088/2752-5295/ad3a0b/pdf |
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crioppubl:10.1088/2752-5295/ad3a0b 2024-06-02T07:58:05+00:00 Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop Mezzina, Bianca Goosse, Hugues Huot, Pierre-Vincent Marchi, Sylvain Van Lipzig, Nicole EOS excellence of science Fonds De La Recherche Scientifique - FNRS 2024 http://dx.doi.org/10.1088/2752-5295/ad3a0b https://iopscience.iop.org/article/10.1088/2752-5295/ad3a0b https://iopscience.iop.org/article/10.1088/2752-5295/ad3a0b/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research: Climate volume 3, issue 2, page 021002 ISSN 2752-5295 journal-article 2024 crioppubl https://doi.org/10.1088/2752-5295/ad3a0b 2024-05-07T14:06:07Z Abstract The 2016 Antarctic sea ice extent (SIE) drop was a rapid decrease that led to persistent low sea ice conditions. The event was triggered by atmospheric anomalies, but the potential preconditioning role of the ocean is unsettled. Here, we use sensitivity experiments with a fully-coupled regional climate model to elucidate the impact of the ocean conditions on the drop and on the persistence of the negative SIE anomalies during 2017. In particular, we re-initialize the model in January 2016 using different ocean and sea ice conditions, keeping lateral boundary forcings in the atmosphere and ocean unchanged. We find that the state of the Southern Ocean in early 2016 does not determine whether the drop occurs or not, but indeed has an impact on its amplitude and regional characteristics. Our results also indicate that the ocean initialization affects the sea ice recovery after the drop in the short term (one year), especially in the Weddell sector. The ocean’s influence appears not to be linked to the ocean surface and sea-ice initialization, but rather to the sub-surface conditions (between 50 m and 150 m) and heat exchange fluctuations at the regional scale, while the atmospheric forcing triggering the drop is driven by the large-scale circulation. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean IOP Publishing Antarctic Southern Ocean Weddell Environmental Research: Climate 3 2 021002 |
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IOP Publishing |
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Abstract The 2016 Antarctic sea ice extent (SIE) drop was a rapid decrease that led to persistent low sea ice conditions. The event was triggered by atmospheric anomalies, but the potential preconditioning role of the ocean is unsettled. Here, we use sensitivity experiments with a fully-coupled regional climate model to elucidate the impact of the ocean conditions on the drop and on the persistence of the negative SIE anomalies during 2017. In particular, we re-initialize the model in January 2016 using different ocean and sea ice conditions, keeping lateral boundary forcings in the atmosphere and ocean unchanged. We find that the state of the Southern Ocean in early 2016 does not determine whether the drop occurs or not, but indeed has an impact on its amplitude and regional characteristics. Our results also indicate that the ocean initialization affects the sea ice recovery after the drop in the short term (one year), especially in the Weddell sector. The ocean’s influence appears not to be linked to the ocean surface and sea-ice initialization, but rather to the sub-surface conditions (between 50 m and 150 m) and heat exchange fluctuations at the regional scale, while the atmospheric forcing triggering the drop is driven by the large-scale circulation. |
author2 |
EOS excellence of science Fonds De La Recherche Scientifique - FNRS |
format |
Article in Journal/Newspaper |
author |
Mezzina, Bianca Goosse, Hugues Huot, Pierre-Vincent Marchi, Sylvain Van Lipzig, Nicole |
spellingShingle |
Mezzina, Bianca Goosse, Hugues Huot, Pierre-Vincent Marchi, Sylvain Van Lipzig, Nicole Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop |
author_facet |
Mezzina, Bianca Goosse, Hugues Huot, Pierre-Vincent Marchi, Sylvain Van Lipzig, Nicole |
author_sort |
Mezzina, Bianca |
title |
Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop |
title_short |
Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop |
title_full |
Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop |
title_fullStr |
Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop |
title_full_unstemmed |
Contributions of atmospheric forcing and ocean preconditioning in the 2016 Antarctic sea ice extent drop |
title_sort |
contributions of atmospheric forcing and ocean preconditioning in the 2016 antarctic sea ice extent drop |
publisher |
IOP Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1088/2752-5295/ad3a0b https://iopscience.iop.org/article/10.1088/2752-5295/ad3a0b https://iopscience.iop.org/article/10.1088/2752-5295/ad3a0b/pdf |
geographic |
Antarctic Southern Ocean Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
Environmental Research: Climate volume 3, issue 2, page 021002 ISSN 2752-5295 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/2752-5295/ad3a0b |
container_title |
Environmental Research: Climate |
container_volume |
3 |
container_issue |
2 |
container_start_page |
021002 |
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1800741339954937856 |