Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate
Abstract Patterns of sea surface temperature (SST) anomalies of the Indian Ocean Dipole (IOD) exhibit strong diversity, ranging from being dominated by the western tropical Indian Ocean (WTIO) to the eastern tropical Indian Ocean (ETIO). Whether and how the different types of IOD variability pattern...
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ftdoajarticles:oai:doaj.org/article:2b2490b6acca466ebac6bd1f76901234 2024-09-09T19:00:00+00:00 Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate Li Zhang Xuya Ren Wenju Cai Xichen Li Lixin Wu 2024-04-01T00:00:00Z https://doi.org/10.1038/s41467-024-47655-0 https://doaj.org/article/2b2490b6acca466ebac6bd1f76901234 EN eng Nature Portfolio https://doi.org/10.1038/s41467-024-47655-0 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-47655-0 2041-1723 https://doaj.org/article/2b2490b6acca466ebac6bd1f76901234 Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024) Science Q article 2024 ftdoajarticles https://doi.org/10.1038/s41467-024-47655-0 2024-08-05T17:49:33Z Abstract Patterns of sea surface temperature (SST) anomalies of the Indian Ocean Dipole (IOD) exhibit strong diversity, ranging from being dominated by the western tropical Indian Ocean (WTIO) to the eastern tropical Indian Ocean (ETIO). Whether and how the different types of IOD variability patterns affect the variability of Antarctic sea ice is not known, nor is how the impact may change in a warming climate. Here, we find that the leading mode of austral spring Antarctic sea ice variability is dominated by WTIO SST variability rather than ETIO SST or El Niño–Southern Oscillation. WTIO warm SST anomalies excite a poleward-propagating Rossby wave, inducing a tri-polar anomaly pattern characterized by a decrease in sea ice near the Amundsen Sea but an increase in regions on both sides. Such impact has been weakening in the two decades post-2000, accompanied by weakened WTIO SST variability. Under greenhouse warming, climate models project a decrease in WTIO SST variability, suggesting that the reduced impact on Antarctic sea ice from the IOD will likely to continue, facilitating a fast decline of Antarctic sea ice. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Austral Amundsen Sea Indian Nature Communications 15 1 |
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English |
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Science Q |
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Science Q Li Zhang Xuya Ren Wenju Cai Xichen Li Lixin Wu Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate |
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Science Q |
description |
Abstract Patterns of sea surface temperature (SST) anomalies of the Indian Ocean Dipole (IOD) exhibit strong diversity, ranging from being dominated by the western tropical Indian Ocean (WTIO) to the eastern tropical Indian Ocean (ETIO). Whether and how the different types of IOD variability patterns affect the variability of Antarctic sea ice is not known, nor is how the impact may change in a warming climate. Here, we find that the leading mode of austral spring Antarctic sea ice variability is dominated by WTIO SST variability rather than ETIO SST or El Niño–Southern Oscillation. WTIO warm SST anomalies excite a poleward-propagating Rossby wave, inducing a tri-polar anomaly pattern characterized by a decrease in sea ice near the Amundsen Sea but an increase in regions on both sides. Such impact has been weakening in the two decades post-2000, accompanied by weakened WTIO SST variability. Under greenhouse warming, climate models project a decrease in WTIO SST variability, suggesting that the reduced impact on Antarctic sea ice from the IOD will likely to continue, facilitating a fast decline of Antarctic sea ice. |
format |
Article in Journal/Newspaper |
author |
Li Zhang Xuya Ren Wenju Cai Xichen Li Lixin Wu |
author_facet |
Li Zhang Xuya Ren Wenju Cai Xichen Li Lixin Wu |
author_sort |
Li Zhang |
title |
Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate |
title_short |
Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate |
title_full |
Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate |
title_fullStr |
Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate |
title_full_unstemmed |
Weakened western Indian Ocean dominance on Antarctic sea ice variability in a changing climate |
title_sort |
weakened western indian ocean dominance on antarctic sea ice variability in a changing climate |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41467-024-47655-0 https://doaj.org/article/2b2490b6acca466ebac6bd1f76901234 |
geographic |
Antarctic Austral Amundsen Sea Indian |
geographic_facet |
Antarctic Austral Amundsen Sea Indian |
genre |
Amundsen Sea Antarc* Antarctic Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctic Sea ice |
op_source |
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024) |
op_relation |
https://doi.org/10.1038/s41467-024-47655-0 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-47655-0 2041-1723 https://doaj.org/article/2b2490b6acca466ebac6bd1f76901234 |
op_doi |
https://doi.org/10.1038/s41467-024-47655-0 |
container_title |
Nature Communications |
container_volume |
15 |
container_issue |
1 |
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1809936657896439808 |