Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996
Changes in the oceanographic climate of the Arctic Ocean during the 1990s have been linked to anomalous heat and volume transports of Atlantic Water (AW) from the Nordic Seas. This paper focuses on the variability in the AW temperature in the Norwegian Sea and in the Barents Sea Opening (BSO), using...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.25.1460 2023-05-15T15:16:39+02:00 Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 Tore Furevik The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.25.1460 http://www.gfi.uib.no/~tore/OLpub/FullText/dsr2001ft.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.25.1460 http://www.gfi.uib.no/~tore/OLpub/FullText/dsr2001ft.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfi.uib.no/~tore/OLpub/FullText/dsr2001ft.pdf Temperature anomalies Air}sea interaction Horizontal advection Climate North Atlantic Nordic Seas text 2001 ftciteseerx 2016-01-07T19:39:43Z Changes in the oceanographic climate of the Arctic Ocean during the 1990s have been linked to anomalous heat and volume transports of Atlantic Water (AW) from the Nordic Seas. This paper focuses on the variability in the AW temperature in the Norwegian Sea and in the Barents Sea Opening (BSO), using 16 years of data from "ve regular hydrographic sections across the #ow of AW from the Faroe}Shetland in#owing area to the Barents Sea and Fram Strait. In a section across the BSO, data from 102 surveys were analysed. Here time series for mean temperatures and salinities are constructed for 10, 50, 100, 200, 300, and 400 m depths. While seasonal- and shorter-period variability has largest amplitudes in the water masses above 200 m depth, interannual variability in temperature has largest amplitudes near the bottom. At 400 m depth, the amplitudes of the interannual variations are of the order of 13C and exceed the magnitude of the seasonal cycle. Two warm periods, 1983}1984 (W1) and 1990}1992 (W2), and one cold period, 1986}1988 (C1), are discussed. W1 and partly C1 can be traced back to the Iceland}Scotland Gap, from where they were advected with the mean #ow of AW northwards along the eastern #ank of the Nordic Seas. The temperature anomalies decreased in magnitude while they moved towards the north. W2 had a di!erent characteristic, as it can be explained by reduced heat loss to the atmosphere, or by an increased advection speed, within the Nordic Seas. The anomaly was strengthened along the #ow towards the north. The salinity anomalies were advected with the AW and strengthened by fresh-water #uxes along their pathway inside the Nordic Seas. In the BSO the temperature anomalies indicate that the AW in#ow to the Barents Sea occurs in two branches along the southern slope of. Text Arctic Arctic Ocean Barents Sea Fram Strait Iceland Nordic Seas North Atlantic Norwegian Sea Unknown Arctic Arctic Ocean Barents Sea Norwegian Sea |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Temperature anomalies Air}sea interaction Horizontal advection Climate North Atlantic Nordic Seas |
spellingShingle |
Temperature anomalies Air}sea interaction Horizontal advection Climate North Atlantic Nordic Seas Tore Furevik Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 |
topic_facet |
Temperature anomalies Air}sea interaction Horizontal advection Climate North Atlantic Nordic Seas |
description |
Changes in the oceanographic climate of the Arctic Ocean during the 1990s have been linked to anomalous heat and volume transports of Atlantic Water (AW) from the Nordic Seas. This paper focuses on the variability in the AW temperature in the Norwegian Sea and in the Barents Sea Opening (BSO), using 16 years of data from "ve regular hydrographic sections across the #ow of AW from the Faroe}Shetland in#owing area to the Barents Sea and Fram Strait. In a section across the BSO, data from 102 surveys were analysed. Here time series for mean temperatures and salinities are constructed for 10, 50, 100, 200, 300, and 400 m depths. While seasonal- and shorter-period variability has largest amplitudes in the water masses above 200 m depth, interannual variability in temperature has largest amplitudes near the bottom. At 400 m depth, the amplitudes of the interannual variations are of the order of 13C and exceed the magnitude of the seasonal cycle. Two warm periods, 1983}1984 (W1) and 1990}1992 (W2), and one cold period, 1986}1988 (C1), are discussed. W1 and partly C1 can be traced back to the Iceland}Scotland Gap, from where they were advected with the mean #ow of AW northwards along the eastern #ank of the Nordic Seas. The temperature anomalies decreased in magnitude while they moved towards the north. W2 had a di!erent characteristic, as it can be explained by reduced heat loss to the atmosphere, or by an increased advection speed, within the Nordic Seas. The anomaly was strengthened along the #ow towards the north. The salinity anomalies were advected with the AW and strengthened by fresh-water #uxes along their pathway inside the Nordic Seas. In the BSO the temperature anomalies indicate that the AW in#ow to the Barents Sea occurs in two branches along the southern slope of. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Tore Furevik |
author_facet |
Tore Furevik |
author_sort |
Tore Furevik |
title |
Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 |
title_short |
Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 |
title_full |
Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 |
title_fullStr |
Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 |
title_full_unstemmed |
Annual and interannual variability of Atlantic Water temperatures in the Norwegian and Barents Seas: 1980-1996 |
title_sort |
annual and interannual variability of atlantic water temperatures in the norwegian and barents seas: 1980-1996 |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.25.1460 http://www.gfi.uib.no/~tore/OLpub/FullText/dsr2001ft.pdf |
geographic |
Arctic Arctic Ocean Barents Sea Norwegian Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea Norwegian Sea |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Iceland Nordic Seas North Atlantic Norwegian Sea |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Iceland Nordic Seas North Atlantic Norwegian Sea |
op_source |
http://www.gfi.uib.no/~tore/OLpub/FullText/dsr2001ft.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.25.1460 http://www.gfi.uib.no/~tore/OLpub/FullText/dsr2001ft.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766346954279747584 |