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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Online Access: | https://oceanrep.geomar.de/id/eprint/7288/ https://oceanrep.geomar.de/id/eprint/7288/1/6443-17960-1-PB.pdf |
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ftoceanrep:oai:oceanrep.geomar.de:7288 2023-05-15T16:26:30+02:00 Variability of the Northern Annular Mode's signature in winter sea ice concentration Krahmann, Gerd Visbeck, Martin 2003 text https://oceanrep.geomar.de/id/eprint/7288/ https://oceanrep.geomar.de/id/eprint/7288/1/6443-17960-1-PB.pdf en eng Norwegian Polar Institute https://oceanrep.geomar.de/id/eprint/7288/1/6443-17960-1-PB.pdf Krahmann, G. and Visbeck, M. (2003) Variability of the Northern Annular Mode's signature in winter sea ice concentration. Open Access Polar Research, 22 (1). pp. 51-57. cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2003 ftoceanrep 2023-04-07T14:54:32Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
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://oceanrep.geomar.de/id/eprint/7288/ https://oceanrep.geomar.de/id/eprint/7288/1/6443-17960-1-PB.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
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_relation |
https://oceanrep.geomar.de/id/eprint/7288/1/6443-17960-1-PB.pdf Krahmann, G. and Visbeck, M. (2003) Variability of the Northern Annular Mode's signature in winter sea ice concentration. Open Access Polar Research, 22 (1). pp. 51-57. |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
_version_ |
1766015428994269184 |