Variability of the Northern Annular Mode’s signature in winter sea ice concentration
Historical winter sea ice concentration data are used to examine the relation between the Northern Annular Mode (NAM) and the sea ice concentration in the Nordic seas over the past 50 years. The well known basic response pattern of a seesaw between the Labrador Sea and the Greenland, Iceland and Bar...
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Norwegian Polar Institute
2003
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ftjpolarres:oai:journals.openacademia.net:article/2096 2024-09-15T18:08:55+00:00 Variability of the Northern Annular Mode’s signature in winter sea ice concentration Krahmann, Gerd Visbeck, Martin 2003-01-06 application/pdf https://polarresearch.net/index.php/polar/article/view/2096 https://doi.org/10.3402/polar.v22i1.6443 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2096/5347 https://polarresearch.net/index.php/polar/article/view/2096 doi:10.3402/polar.v22i1.6443 Polar Research; Vol. 22 No. 1 (2003): Special issue: Proceedings of the Workshop on Sea Ice Extent and the Global Climate System; 51-57 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftjpolarres https://doi.org/10.3402/polar.v22i1.6443 2024-06-28T03:10:15Z Historical winter sea ice concentration data are used to examine the relation between the Northern Annular Mode (NAM) and the sea ice concentration in the Nordic seas over the past 50 years. The well known basic response pattern of a seesaw between the Labrador Sea and the Greenland, Iceland and Barents seas is being reproduced. However, the response is not robust in the Greenland and Iceland seas. There the observed variability has a more complex relationship with surface temperatures and winds. We divide the sea ice response into three spectral bands: high (P < 5 year), band (5 < P < 15 year), and low pass (P > 15 year) filtered NAM indices. This division is motivated by the expected slow response of the ocean circulation which might play a significant role in the Greenland and Iceland seas. The response to the NAM is also examined separately for the periods before and after 1976 to identify variations due to the relocation of the northern centre of the North Atlantic Oscillation. Article in Journal/Newspaper Greenland Iceland Labrador Sea Nordic Seas North Atlantic North Atlantic oscillation Polar Research Sea ice Polar Research Polar Research 22 1 51 57 |
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Open Polar |
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Polar Research |
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ftjpolarres |
language |
English |
description |
Historical winter sea ice concentration data are used to examine the relation between the Northern Annular Mode (NAM) and the sea ice concentration in the Nordic seas over the past 50 years. The well known basic response pattern of a seesaw between the Labrador Sea and the Greenland, Iceland and Barents seas is being reproduced. However, the response is not robust in the Greenland and Iceland seas. There the observed variability has a more complex relationship with surface temperatures and winds. We divide the sea ice response into three spectral bands: high (P < 5 year), band (5 < P < 15 year), and low pass (P > 15 year) filtered NAM indices. This division is motivated by the expected slow response of the ocean circulation which might play a significant role in the Greenland and Iceland seas. The response to the NAM is also examined separately for the periods before and after 1976 to identify variations due to the relocation of the northern centre of the North Atlantic Oscillation. |
format |
Article in Journal/Newspaper |
author |
Krahmann, Gerd Visbeck, Martin |
spellingShingle |
Krahmann, Gerd Visbeck, Martin Variability of the Northern Annular Mode’s signature in winter sea ice concentration |
author_facet |
Krahmann, Gerd Visbeck, Martin |
author_sort |
Krahmann, Gerd |
title |
Variability of the Northern Annular Mode’s signature in winter sea ice concentration |
title_short |
Variability of the Northern Annular Mode’s signature in winter sea ice concentration |
title_full |
Variability of the Northern Annular Mode’s signature in winter sea ice concentration |
title_fullStr |
Variability of the Northern Annular Mode’s signature in winter sea ice concentration |
title_full_unstemmed |
Variability of the Northern Annular Mode’s signature in winter sea ice concentration |
title_sort |
variability of the northern annular mode’s signature in winter sea ice concentration |
publisher |
Norwegian Polar Institute |
publishDate |
2003 |
url |
https://polarresearch.net/index.php/polar/article/view/2096 https://doi.org/10.3402/polar.v22i1.6443 |
genre |
Greenland Iceland Labrador Sea Nordic Seas North Atlantic North Atlantic oscillation Polar Research Sea ice |
genre_facet |
Greenland Iceland Labrador Sea Nordic Seas North Atlantic North Atlantic oscillation Polar Research Sea ice |
op_source |
Polar Research; Vol. 22 No. 1 (2003): Special issue: Proceedings of the Workshop on Sea Ice Extent and the Global Climate System; 51-57 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2096/5347 https://polarresearch.net/index.php/polar/article/view/2096 doi:10.3402/polar.v22i1.6443 |
op_doi |
https://doi.org/10.3402/polar.v22i1.6443 |
container_title |
Polar Research |
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22 |
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1 |
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51 |
op_container_end_page |
57 |
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1810446285504774144 |