Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere
Abstract Based on statistical analyses of gridded data over the past four decades (1979–2020), we examined the teleconnection between the variability of the Antarctic sea ice and the leading modes of subtropical sea surface temperature (SST) variability known as the Indian Ocean subtropical dipole (...
Published in: | International Journal of Climatology |
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Online Access: | http://dx.doi.org/10.1002/joc.8195 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8195 |
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crwiley:10.1002/joc.8195 2024-06-02T07:57:28+00:00 Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere Yu, Lejiang Zhong, Shiyuan Sun, Bo National Key Research and Development Program of China 2023 http://dx.doi.org/10.1002/joc.8195 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8195 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 43, issue 13, page 6131-6149 ISSN 0899-8418 1097-0088 journal-article 2023 crwiley https://doi.org/10.1002/joc.8195 2024-05-03T10:44:02Z Abstract Based on statistical analyses of gridded data over the past four decades (1979–2020), we examined the teleconnection between the variability of the Antarctic sea ice and the leading modes of subtropical sea surface temperature (SST) variability known as the Indian Ocean subtropical dipole (IOSD), the South Atlantic subtropical dipole (SASD) and the South Pacific subtropical dipole (SPSD). We show that the pattern and strength of the teleconnection differ with the SST modes. For each mode, while the regional distributions of significant Antarctic sea ice anomalies are broadly similar throughout the year, the areal extent and the magnitudes of the anomalies display a strong seasonality. Larger areas and magnitudes of significant sea ice anomalies occur in austral winter for the SASD, autumn and spring for the SPSD and non‐summer seasons for the IOSD. We demonstrate that the spatial and seasonal variations of the sea ice anomalies associated with each of the three subtropical SST variability modes are largely consistent with the patterns of the anomalous temperature advection and sea ice transport by the anomalous atmospheric circulations induced by planetary wavetrains that are triggered by anomalous convective activities over different regions of subtropical oceans. These relationships between subtropical SST modes and Antarctic sea ice may serve as a valuable reference for predicting seasonal to interannual scale variations of Antarctic sea ice concentrations across each austral season. Article in Journal/Newspaper Antarc* Antarctic Sea ice Wiley Online Library Antarctic Austral Indian Pacific The Antarctic International Journal of Climatology |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Based on statistical analyses of gridded data over the past four decades (1979–2020), we examined the teleconnection between the variability of the Antarctic sea ice and the leading modes of subtropical sea surface temperature (SST) variability known as the Indian Ocean subtropical dipole (IOSD), the South Atlantic subtropical dipole (SASD) and the South Pacific subtropical dipole (SPSD). We show that the pattern and strength of the teleconnection differ with the SST modes. For each mode, while the regional distributions of significant Antarctic sea ice anomalies are broadly similar throughout the year, the areal extent and the magnitudes of the anomalies display a strong seasonality. Larger areas and magnitudes of significant sea ice anomalies occur in austral winter for the SASD, autumn and spring for the SPSD and non‐summer seasons for the IOSD. We demonstrate that the spatial and seasonal variations of the sea ice anomalies associated with each of the three subtropical SST variability modes are largely consistent with the patterns of the anomalous temperature advection and sea ice transport by the anomalous atmospheric circulations induced by planetary wavetrains that are triggered by anomalous convective activities over different regions of subtropical oceans. These relationships between subtropical SST modes and Antarctic sea ice may serve as a valuable reference for predicting seasonal to interannual scale variations of Antarctic sea ice concentrations across each austral season. |
author2 |
National Key Research and Development Program of China |
format |
Article in Journal/Newspaper |
author |
Yu, Lejiang Zhong, Shiyuan Sun, Bo |
spellingShingle |
Yu, Lejiang Zhong, Shiyuan Sun, Bo Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere |
author_facet |
Yu, Lejiang Zhong, Shiyuan Sun, Bo |
author_sort |
Yu, Lejiang |
title |
Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere |
title_short |
Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere |
title_full |
Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere |
title_fullStr |
Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere |
title_full_unstemmed |
Antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the Southern Hemisphere |
title_sort |
antarctic sea ice variability linked to three dipole modes of subtropical sea surface temperature in the southern hemisphere |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/joc.8195 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8195 |
geographic |
Antarctic Austral Indian Pacific The Antarctic |
geographic_facet |
Antarctic Austral Indian Pacific The Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
International Journal of Climatology volume 43, issue 13, page 6131-6149 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.8195 |
container_title |
International Journal of Climatology |
_version_ |
1800740624289234944 |