Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice
Abstract Antarctic sea ice plays an important role in polar ecosystems and global climate, while its variability is affected by many factors. Teleconnections between the tropical and high latitudes have profound impacts on Antarctic climate changes through the stationary Rossby wave mechanism. Recen...
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Online Access: | http://dx.doi.org/10.1088/1748-9326/ac8f5b https://iopscience.iop.org/article/10.1088/1748-9326/ac8f5b https://iopscience.iop.org/article/10.1088/1748-9326/ac8f5b/pdf |
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crioppubl:10.1088/1748-9326/ac8f5b 2024-06-23T07:47:40+00:00 Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice Ren, Xuya Zhang, Li Cai, Wenju Li, Xichen Wang, Chuan-Yang Jin, Yishuai Wu, Lixin National Key Research and Development Program of China National Natural Science Foundation of China Strategic Priority Research Program of Chinese Academy of Sciences 2022 http://dx.doi.org/10.1088/1748-9326/ac8f5b https://iopscience.iop.org/article/10.1088/1748-9326/ac8f5b https://iopscience.iop.org/article/10.1088/1748-9326/ac8f5b/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 17, issue 9, page 094046 ISSN 1748-9326 journal-article 2022 crioppubl https://doi.org/10.1088/1748-9326/ac8f5b 2024-06-03T08:15:36Z Abstract Antarctic sea ice plays an important role in polar ecosystems and global climate, while its variability is affected by many factors. Teleconnections between the tropical and high latitudes have profound impacts on Antarctic climate changes through the stationary Rossby wave mechanism. Recent studies have connected long-term Antarctic sea ice changes to multidecadal variabilities of the tropical ocean, including the Atlantic Multidecadal Oscillation and the Interdecadal Pacific Oscillation. On interannual timescales, whether an impact exists from teleconnection of the tropical Atlantic is not clear. Here we find an impact of sea surface temperature (SST) variability of the tropical Atlantic meridional dipole mode on Antarctic sea ice that is most prominent in austral autumn. The meridional dipole SST anomalies in the tropical Atlantic force deep convection anomalies locally and over the tropical Pacific, generating stationary Rossby wave trains propagating eastward and poleward, which induce atmospheric circulation anomalies affecting sea ice. Specifically, convective anomalies over the equatorial Atlantic and Pacific are opposite-signed, accompanied by anomalous wave sources over the subtropical Southern Hemisphere. The planetary-scale atmospheric response has significant impacts on sea ice concentration anomalies in the Ross Sea, near the Antarctic Peninsula, and east of the Weddell Sea. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ross Sea Sea ice Weddell Sea IOP Publishing Antarctic The Antarctic Antarctic Peninsula Weddell Sea Austral Ross Sea Pacific Weddell Environmental Research Letters 17 9 094046 |
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Abstract Antarctic sea ice plays an important role in polar ecosystems and global climate, while its variability is affected by many factors. Teleconnections between the tropical and high latitudes have profound impacts on Antarctic climate changes through the stationary Rossby wave mechanism. Recent studies have connected long-term Antarctic sea ice changes to multidecadal variabilities of the tropical ocean, including the Atlantic Multidecadal Oscillation and the Interdecadal Pacific Oscillation. On interannual timescales, whether an impact exists from teleconnection of the tropical Atlantic is not clear. Here we find an impact of sea surface temperature (SST) variability of the tropical Atlantic meridional dipole mode on Antarctic sea ice that is most prominent in austral autumn. The meridional dipole SST anomalies in the tropical Atlantic force deep convection anomalies locally and over the tropical Pacific, generating stationary Rossby wave trains propagating eastward and poleward, which induce atmospheric circulation anomalies affecting sea ice. Specifically, convective anomalies over the equatorial Atlantic and Pacific are opposite-signed, accompanied by anomalous wave sources over the subtropical Southern Hemisphere. The planetary-scale atmospheric response has significant impacts on sea ice concentration anomalies in the Ross Sea, near the Antarctic Peninsula, and east of the Weddell Sea. |
author2 |
National Key Research and Development Program of China National Natural Science Foundation of China Strategic Priority Research Program of Chinese Academy of Sciences |
format |
Article in Journal/Newspaper |
author |
Ren, Xuya Zhang, Li Cai, Wenju Li, Xichen Wang, Chuan-Yang Jin, Yishuai Wu, Lixin |
spellingShingle |
Ren, Xuya Zhang, Li Cai, Wenju Li, Xichen Wang, Chuan-Yang Jin, Yishuai Wu, Lixin Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice |
author_facet |
Ren, Xuya Zhang, Li Cai, Wenju Li, Xichen Wang, Chuan-Yang Jin, Yishuai Wu, Lixin |
author_sort |
Ren, Xuya |
title |
Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice |
title_short |
Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice |
title_full |
Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice |
title_fullStr |
Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice |
title_full_unstemmed |
Influence of tropical Atlantic meridional dipole of sea surface temperature anomalies on Antarctic autumn sea ice |
title_sort |
influence of tropical atlantic meridional dipole of sea surface temperature anomalies on antarctic autumn sea ice |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1748-9326/ac8f5b https://iopscience.iop.org/article/10.1088/1748-9326/ac8f5b https://iopscience.iop.org/article/10.1088/1748-9326/ac8f5b/pdf |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Austral Ross Sea Pacific Weddell |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Austral Ross Sea Pacific Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Ross Sea Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ross Sea Sea ice Weddell Sea |
op_source |
Environmental Research Letters volume 17, issue 9, page 094046 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac8f5b |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
9 |
container_start_page |
094046 |
_version_ |
1802651818168156160 |