Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability
The Antarctic sea ice extent slowly expanded through the four-decade-long satellite era until 2014 when the expansion came to a halt, followed by a rapid contraction in the next couple of years. This sudden unexpected trend reversal has sparked considerable research interest and several mechanisms h...
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Online Access: | https://doi.org/10.1088/1748-9326/ac9c73 https://doaj.org/article/fd5a023cd45248b6b3ac70bf92404f11 |
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ftdoajarticles:oai:doaj.org/article:fd5a023cd45248b6b3ac70bf92404f11 2023-09-05T13:15:01+02:00 Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability Lejiang Yu Shiyuan Zhong Timo Vihma Cuijuan Sui Bo Sun 2022-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ac9c73 https://doaj.org/article/fd5a023cd45248b6b3ac70bf92404f11 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ac9c73 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac9c73 1748-9326 https://doaj.org/article/fd5a023cd45248b6b3ac70bf92404f11 Environmental Research Letters, Vol 17, Iss 11, p 114026 (2022) Antarctic sea ice extent trend planetary wavetrain sea surface temperature (SST) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2022 ftdoajarticles https://doi.org/10.1088/1748-9326/ac9c73 2023-08-13T00:36:51Z The Antarctic sea ice extent slowly expanded through the four-decade-long satellite era until 2014 when the expansion came to a halt, followed by a rapid contraction in the next couple of years. This sudden unexpected trend reversal has sparked considerable research interest and several mechanisms have been proposed to explain it; however, much remains to be explored. In this study, we show that the long-term increasing trend in the Antarctic sea ice extent and its recent reversal can be largely explained by the first, second and fourth empirical orthogonal function mode of sea ice variability in austral summer, autumn and spring, respectively. We illustrate that the sea ice variability represented by the three modes is mostly consistent with what is expected from the anomalous atmospheric circulations associated with planetary wavetrains that are triggered by anomalous sea surface temperature (SST) and convective activities over the Southern Indian and Pacific Oceans. More specifically, the results suggest a teleconnection between the increasing periods in the Antarctic sea ice extent in the past four decades and the positive SST anomalies over the southeastern Indian Ocean and the western tropical Pacific Ocean. The opposite occurs over the decreasing period. Accordingly, the same mechanisms, in different phases, have been associated with the periods of increasing and decreasing Antarctic sea ice extent. Article in Journal/Newspaper Antarc* Antarctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Austral Indian Pacific The Antarctic Environmental Research Letters 17 11 114026 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic sea ice extent trend planetary wavetrain sea surface temperature (SST) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
Antarctic sea ice extent trend planetary wavetrain sea surface temperature (SST) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Lejiang Yu Shiyuan Zhong Timo Vihma Cuijuan Sui Bo Sun Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability |
topic_facet |
Antarctic sea ice extent trend planetary wavetrain sea surface temperature (SST) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
The Antarctic sea ice extent slowly expanded through the four-decade-long satellite era until 2014 when the expansion came to a halt, followed by a rapid contraction in the next couple of years. This sudden unexpected trend reversal has sparked considerable research interest and several mechanisms have been proposed to explain it; however, much remains to be explored. In this study, we show that the long-term increasing trend in the Antarctic sea ice extent and its recent reversal can be largely explained by the first, second and fourth empirical orthogonal function mode of sea ice variability in austral summer, autumn and spring, respectively. We illustrate that the sea ice variability represented by the three modes is mostly consistent with what is expected from the anomalous atmospheric circulations associated with planetary wavetrains that are triggered by anomalous sea surface temperature (SST) and convective activities over the Southern Indian and Pacific Oceans. More specifically, the results suggest a teleconnection between the increasing periods in the Antarctic sea ice extent in the past four decades and the positive SST anomalies over the southeastern Indian Ocean and the western tropical Pacific Ocean. The opposite occurs over the decreasing period. Accordingly, the same mechanisms, in different phases, have been associated with the periods of increasing and decreasing Antarctic sea ice extent. |
format |
Article in Journal/Newspaper |
author |
Lejiang Yu Shiyuan Zhong Timo Vihma Cuijuan Sui Bo Sun |
author_facet |
Lejiang Yu Shiyuan Zhong Timo Vihma Cuijuan Sui Bo Sun |
author_sort |
Lejiang Yu |
title |
Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability |
title_short |
Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability |
title_full |
Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability |
title_fullStr |
Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability |
title_full_unstemmed |
Linking the Antarctic sea ice extent changes during 1979–2020 to seasonal modes of Antarctic sea ice variability |
title_sort |
linking the antarctic sea ice extent changes during 1979–2020 to seasonal modes of antarctic sea ice variability |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
https://doi.org/10.1088/1748-9326/ac9c73 https://doaj.org/article/fd5a023cd45248b6b3ac70bf92404f11 |
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 |
Environmental Research Letters, Vol 17, Iss 11, p 114026 (2022) |
op_relation |
https://doi.org/10.1088/1748-9326/ac9c73 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac9c73 1748-9326 https://doaj.org/article/fd5a023cd45248b6b3ac70bf92404f11 |
op_doi |
https://doi.org/10.1088/1748-9326/ac9c73 |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
11 |
container_start_page |
114026 |
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1776196866568880128 |