Modes of the wintertime Arctic temperature variability
It is shown that the Arctic averaged wintertime temperature variability during the 20th century can be essentially described by two orthogonal modes. These modes were identified by an Empirical Orthogonal Function (EOF) decomposition of the 1892-1999 surface wintertime air temperature anomalies (40d...
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ftpubman:oai:pure.mpg.de:item_995288 2023-08-27T04:07:01+02:00 Modes of the wintertime Arctic temperature variability Semenov, V. Bengtsson, L. 2003-08-01 application/pdf http://hdl.handle.net/11858/00-001M-0000-0012-016B-F http://hdl.handle.net/21.11116/0000-0003-306F-B http://hdl.handle.net/21.11116/0000-0003-3074-4 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/2003GL017112 http://hdl.handle.net/11858/00-001M-0000-0012-016B-F http://hdl.handle.net/21.11116/0000-0003-306F-B http://hdl.handle.net/21.11116/0000-0003-3074-4 info:eu-repo/semantics/openAccess Geophysical Research Letters Report / Max-Planck-Institut für Meteorologie info:eu-repo/semantics/article 2003 ftpubman https://doi.org/10.1029/2003GL017112 2023-08-02T00:53:03Z It is shown that the Arctic averaged wintertime temperature variability during the 20th century can be essentially described by two orthogonal modes. These modes were identified by an Empirical Orthogonal Function (EOF) decomposition of the 1892-1999 surface wintertime air temperature anomalies (40degreesN-80degreesN) using a gridded dataset covering high Arctic. The first mode (1st leading EOF) is related to the NAO and has a major contribution to Arctic warming during the last 30 years. The second one (3rd leading EOF) dominates the SAT variability prior to 1970. A correlation between the corresponding principal component PC3 and the Arctic SAT anomalies is 0.79. This mode has the largest amplitudes in the Kara-Barents Seas and Baffin Bay and exhibits no direct link to the large-scale atmospheric circulation variability, in contrast to the other leading EOFs. We suggest that the existence of this mode is caused by long-term sea ice variations presumably due to Atlantic inflow variability. Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Sea ice Max Planck Society: MPG.PuRe Arctic Baffin Bay Geophysical Research Letters 30 15 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
It is shown that the Arctic averaged wintertime temperature variability during the 20th century can be essentially described by two orthogonal modes. These modes were identified by an Empirical Orthogonal Function (EOF) decomposition of the 1892-1999 surface wintertime air temperature anomalies (40degreesN-80degreesN) using a gridded dataset covering high Arctic. The first mode (1st leading EOF) is related to the NAO and has a major contribution to Arctic warming during the last 30 years. The second one (3rd leading EOF) dominates the SAT variability prior to 1970. A correlation between the corresponding principal component PC3 and the Arctic SAT anomalies is 0.79. This mode has the largest amplitudes in the Kara-Barents Seas and Baffin Bay and exhibits no direct link to the large-scale atmospheric circulation variability, in contrast to the other leading EOFs. We suggest that the existence of this mode is caused by long-term sea ice variations presumably due to Atlantic inflow variability. |
format |
Article in Journal/Newspaper |
author |
Semenov, V. Bengtsson, L. |
spellingShingle |
Semenov, V. Bengtsson, L. Modes of the wintertime Arctic temperature variability |
author_facet |
Semenov, V. Bengtsson, L. |
author_sort |
Semenov, V. |
title |
Modes of the wintertime Arctic temperature variability |
title_short |
Modes of the wintertime Arctic temperature variability |
title_full |
Modes of the wintertime Arctic temperature variability |
title_fullStr |
Modes of the wintertime Arctic temperature variability |
title_full_unstemmed |
Modes of the wintertime Arctic temperature variability |
title_sort |
modes of the wintertime arctic temperature variability |
publishDate |
2003 |
url |
http://hdl.handle.net/11858/00-001M-0000-0012-016B-F http://hdl.handle.net/21.11116/0000-0003-306F-B http://hdl.handle.net/21.11116/0000-0003-3074-4 |
geographic |
Arctic Baffin Bay |
geographic_facet |
Arctic Baffin Bay |
genre |
Arctic Baffin Bay Baffin Bay Baffin Sea ice |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Sea ice |
op_source |
Geophysical Research Letters Report / Max-Planck-Institut für Meteorologie |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2003GL017112 http://hdl.handle.net/11858/00-001M-0000-0012-016B-F http://hdl.handle.net/21.11116/0000-0003-306F-B http://hdl.handle.net/21.11116/0000-0003-3074-4 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2003GL017112 |
container_title |
Geophysical Research Letters |
container_volume |
30 |
container_issue |
15 |
_version_ |
1775347738792165376 |