Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter
Abstract The leading two modes of winter (November–February) Arctic sea ice cover variability and their linkage to stratospheric polar vortex variations are analyzed based on the cyclostationary EOF techniques. The first mode represents an accelerating trend of Arctic sea ice decline associated with...
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Springer Science and Business Media LLC
2020
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crspringernat:10.1007/s00382-020-05191-9 2023-05-15T14:48:16+02:00 Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter Kim, Jinju Kim, Kwang-Yul 2020 http://dx.doi.org/10.1007/s00382-020-05191-9 http://link.springer.com/content/pdf/10.1007/s00382-020-05191-9.pdf http://link.springer.com/article/10.1007/s00382-020-05191-9/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Climate Dynamics volume 54, issue 7-8, page 3599-3611 ISSN 0930-7575 1432-0894 Atmospheric Science journal-article 2020 crspringernat https://doi.org/10.1007/s00382-020-05191-9 2021-11-02T14:53:24Z Abstract The leading two modes of winter (November–February) Arctic sea ice cover variability and their linkage to stratospheric polar vortex variations are analyzed based on the cyclostationary EOF techniques. The first mode represents an accelerating trend of Arctic sea ice decline associated with Arctic amplification, particularly in the Barents and Kara Seas. The second mode is associated with decadal-scale phase shifts of dipole sea ice anomalies in the North Atlantic caused by NAO circulation. The first two modes of sea ice variability represent respectively a forced climate change and internal variability, and result in temporally and spatially distinct stratospheric polar vortex weakening. Sea ice reduction in the Barents and Kara Seas for the first mode is linked to a stratospheric vortex weakening during mid January–late February. The second mode with the dipole structure of positive sea ice anomalies in the Barents and Greenland Seas and negative anomalies in the Hudson Bay and Labrador Sea is related to a stratospheric vortex weakening during December–early February. The spatial evolutionary structure of anomalous polar vortex also exhibits differences between the two modes. When stratospheric anomalies are fully developed, stratospheric vortex is shifted to Eurasia in the first mode and to Europe in the second mode. Article in Journal/Newspaper Arctic Climate change Greenland Hudson Bay Labrador Sea North Atlantic Sea ice Springer Nature (via Crossref) Arctic Greenland Hudson Hudson Bay Climate Dynamics 54 7-8 3599 3611 |
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Open Polar |
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Springer Nature (via Crossref) |
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language |
English |
topic |
Atmospheric Science |
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Atmospheric Science Kim, Jinju Kim, Kwang-Yul Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter |
topic_facet |
Atmospheric Science |
description |
Abstract The leading two modes of winter (November–February) Arctic sea ice cover variability and their linkage to stratospheric polar vortex variations are analyzed based on the cyclostationary EOF techniques. The first mode represents an accelerating trend of Arctic sea ice decline associated with Arctic amplification, particularly in the Barents and Kara Seas. The second mode is associated with decadal-scale phase shifts of dipole sea ice anomalies in the North Atlantic caused by NAO circulation. The first two modes of sea ice variability represent respectively a forced climate change and internal variability, and result in temporally and spatially distinct stratospheric polar vortex weakening. Sea ice reduction in the Barents and Kara Seas for the first mode is linked to a stratospheric vortex weakening during mid January–late February. The second mode with the dipole structure of positive sea ice anomalies in the Barents and Greenland Seas and negative anomalies in the Hudson Bay and Labrador Sea is related to a stratospheric vortex weakening during December–early February. The spatial evolutionary structure of anomalous polar vortex also exhibits differences between the two modes. When stratospheric anomalies are fully developed, stratospheric vortex is shifted to Eurasia in the first mode and to Europe in the second mode. |
format |
Article in Journal/Newspaper |
author |
Kim, Jinju Kim, Kwang-Yul |
author_facet |
Kim, Jinju Kim, Kwang-Yul |
author_sort |
Kim, Jinju |
title |
Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter |
title_short |
Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter |
title_full |
Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter |
title_fullStr |
Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter |
title_full_unstemmed |
Characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the Arctic winter |
title_sort |
characteristics of stratospheric polar vortex fluctuations associated with sea ice variability in the arctic winter |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1007/s00382-020-05191-9 http://link.springer.com/content/pdf/10.1007/s00382-020-05191-9.pdf http://link.springer.com/article/10.1007/s00382-020-05191-9/fulltext.html |
geographic |
Arctic Greenland Hudson Hudson Bay |
geographic_facet |
Arctic Greenland Hudson Hudson Bay |
genre |
Arctic Climate change Greenland Hudson Bay Labrador Sea North Atlantic Sea ice |
genre_facet |
Arctic Climate change Greenland Hudson Bay Labrador Sea North Atlantic Sea ice |
op_source |
Climate Dynamics volume 54, issue 7-8, page 3599-3611 ISSN 0930-7575 1432-0894 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00382-020-05191-9 |
container_title |
Climate Dynamics |
container_volume |
54 |
container_issue |
7-8 |
container_start_page |
3599 |
op_container_end_page |
3611 |
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1766319354025082880 |