Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode
Through analysis of remotely sensed sea surface temperature (SST) and sea ice concentration data, we investigate the impact of winds related to the Southern Annular Mode (SAM) on sea ice extent around Antarctica. We show that positive SAM anomalies in the austral summer are associated with anomalous...
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Online Access: | https://doi.org/10.1002/2017GL074319 http://ecite.utas.edu.au/150151 |
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ftunivtasecite:oai:ecite.utas.edu.au:150151 2023-05-15T13:42:40+02:00 Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode Doddridge, EW Marshall, J 2017 application/pdf https://doi.org/10.1002/2017GL074319 http://ecite.utas.edu.au/150151 en eng Amer Geophysical Union http://ecite.utas.edu.au/150151/1/150151 - Modulation of the seasonal cycle of Antarctic sea ice extent.pdf http://dx.doi.org/10.1002/2017GL074319 Doddridge, EW and Marshall, J, Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode, Geophysical Research Letters, 44, (19) pp. 9761-9768. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/150151 Earth Sciences Oceanography Physical oceanography Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1002/2017GL074319 2022-08-29T22:18:40Z Through analysis of remotely sensed sea surface temperature (SST) and sea ice concentration data, we investigate the impact of winds related to the Southern Annular Mode (SAM) on sea ice extent around Antarctica. We show that positive SAM anomalies in the austral summer are associated with anomalously cold SSTs that persist and lead to anomalous ice growth in the following autumn, while negative SAM anomalies precede warm SSTs and a reduction in sea ice extent during autumn. The largest effect occurs in April, when a unit change in the detrended summertime SAM is followed by a 1.80.6 10 5 km 2 change in detrended sea ice extent. We find no evidence that sea ice extent anomalies related to the summertime SAM affect the wintertime sea ice extent maximum. Our analysis shows that the wind anomalies related to the negative SAM during the 2016/2017 austral summer contributed to the record minimum Antarctic sea ice extent observed in March 2017. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice eCite UTAS (University of Tasmania) Antarctic Austral Geophysical Research Letters 44 19 9761 9768 |
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eCite UTAS (University of Tasmania) |
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English |
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Earth Sciences Oceanography Physical oceanography |
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Earth Sciences Oceanography Physical oceanography Doddridge, EW Marshall, J Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode |
topic_facet |
Earth Sciences Oceanography Physical oceanography |
description |
Through analysis of remotely sensed sea surface temperature (SST) and sea ice concentration data, we investigate the impact of winds related to the Southern Annular Mode (SAM) on sea ice extent around Antarctica. We show that positive SAM anomalies in the austral summer are associated with anomalously cold SSTs that persist and lead to anomalous ice growth in the following autumn, while negative SAM anomalies precede warm SSTs and a reduction in sea ice extent during autumn. The largest effect occurs in April, when a unit change in the detrended summertime SAM is followed by a 1.80.6 10 5 km 2 change in detrended sea ice extent. We find no evidence that sea ice extent anomalies related to the summertime SAM affect the wintertime sea ice extent maximum. Our analysis shows that the wind anomalies related to the negative SAM during the 2016/2017 austral summer contributed to the record minimum Antarctic sea ice extent observed in March 2017. |
format |
Article in Journal/Newspaper |
author |
Doddridge, EW Marshall, J |
author_facet |
Doddridge, EW Marshall, J |
author_sort |
Doddridge, EW |
title |
Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode |
title_short |
Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode |
title_full |
Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode |
title_fullStr |
Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode |
title_full_unstemmed |
Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode |
title_sort |
modulation of the seasonal cycle of antarctic sea ice extent related to the southern annular mode |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://doi.org/10.1002/2017GL074319 http://ecite.utas.edu.au/150151 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://ecite.utas.edu.au/150151/1/150151 - Modulation of the seasonal cycle of Antarctic sea ice extent.pdf http://dx.doi.org/10.1002/2017GL074319 Doddridge, EW and Marshall, J, Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode, Geophysical Research Letters, 44, (19) pp. 9761-9768. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/150151 |
op_doi |
https://doi.org/10.1002/2017GL074319 |
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Geophysical Research Letters |
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44 |
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19 |
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9761 |
op_container_end_page |
9768 |
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1766171284089077760 |