The East Greenland Current studied with CFCs and released sulphur hexafluoride
The distribution and evolution of water masses along the East Greenland Current (EGC) from south of the Fram Strait to the Denmark Strait were investigated using chlorofluorocarbons (CFCs) and the released tracer sulphur hexafluoride (SF6) together with hydrographic data. Water masses contributing t...
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ftunivbergen:oai:bora.uib.no:1956/777 2023-05-15T14:47:09+02:00 The East Greenland Current studied with CFCs and released sulphur hexafluoride Olsson, K. Anders Jeansson, Emil Tanhua, Toste Gascard, Jean-Claude 2005-03 653948 bytes application/pdf https://hdl.handle.net/1956/777 eng eng Elsevier urn:issn:0924-7963 https://hdl.handle.net/1956/777 Journal article 2005 ftunivbergen 2023-03-14T17:39:37Z The distribution and evolution of water masses along the East Greenland Current (EGC) from south of the Fram Strait to the Denmark Strait were investigated using chlorofluorocarbons (CFCs) and the released tracer sulphur hexafluoride (SF6) together with hydrographic data. Water masses contributing to the Denmark Strait overflow, and to some extent also contributions to the Iceland-Scotland overflow, are discussed from observations in 1999. Special emphasis is put on the advection and mixing of Greenland Sea Arctic Intermediate Water (GSAIW), which could be effectively traced thanks to the release of sulphur hexafluoride in the Greenland Sea Gyre in 1996. By means of the dispersion of the tracer, Greenland Sea Arctic Intermediate Water was followed down to the Denmark Strait Sill as well as close to the Faroe-Shetland Channel. The results indicate that this water mass can contribute to both overflows within 3 years from leaving the Greenland Sea. The transformation of Greenland Sea Arctic Intermediate Water was dominated by water from the Arctic Ocean, especially by isopycnal mixing with upper Polar Deep Water (uPDW) but, to a less extent, also by Canadian Basin Deep Water. A mixture of Greenland Sea Arctic Intermediate Water and upper Polar Deep Water was lifted 500 m on its way through southwestern Iceland Sea, to a depth shallow enough to let it reach the sill of the Denmark Strait from where it can be incorporated in the densest layer of the overflow. The observations show contributions to the Denmark Strait overflow from both the East Greenland Current and the Iceland Sea. Article in Journal/Newspaper Arctic Arctic Ocean Denmark Strait East Greenland east greenland current Fram Strait Greenland Greenland Sea Iceland University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Arctic Ocean Greenland |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The distribution and evolution of water masses along the East Greenland Current (EGC) from south of the Fram Strait to the Denmark Strait were investigated using chlorofluorocarbons (CFCs) and the released tracer sulphur hexafluoride (SF6) together with hydrographic data. Water masses contributing to the Denmark Strait overflow, and to some extent also contributions to the Iceland-Scotland overflow, are discussed from observations in 1999. Special emphasis is put on the advection and mixing of Greenland Sea Arctic Intermediate Water (GSAIW), which could be effectively traced thanks to the release of sulphur hexafluoride in the Greenland Sea Gyre in 1996. By means of the dispersion of the tracer, Greenland Sea Arctic Intermediate Water was followed down to the Denmark Strait Sill as well as close to the Faroe-Shetland Channel. The results indicate that this water mass can contribute to both overflows within 3 years from leaving the Greenland Sea. The transformation of Greenland Sea Arctic Intermediate Water was dominated by water from the Arctic Ocean, especially by isopycnal mixing with upper Polar Deep Water (uPDW) but, to a less extent, also by Canadian Basin Deep Water. A mixture of Greenland Sea Arctic Intermediate Water and upper Polar Deep Water was lifted 500 m on its way through southwestern Iceland Sea, to a depth shallow enough to let it reach the sill of the Denmark Strait from where it can be incorporated in the densest layer of the overflow. The observations show contributions to the Denmark Strait overflow from both the East Greenland Current and the Iceland Sea. |
format |
Article in Journal/Newspaper |
author |
Olsson, K. Anders Jeansson, Emil Tanhua, Toste Gascard, Jean-Claude |
spellingShingle |
Olsson, K. Anders Jeansson, Emil Tanhua, Toste Gascard, Jean-Claude The East Greenland Current studied with CFCs and released sulphur hexafluoride |
author_facet |
Olsson, K. Anders Jeansson, Emil Tanhua, Toste Gascard, Jean-Claude |
author_sort |
Olsson, K. Anders |
title |
The East Greenland Current studied with CFCs and released sulphur hexafluoride |
title_short |
The East Greenland Current studied with CFCs and released sulphur hexafluoride |
title_full |
The East Greenland Current studied with CFCs and released sulphur hexafluoride |
title_fullStr |
The East Greenland Current studied with CFCs and released sulphur hexafluoride |
title_full_unstemmed |
The East Greenland Current studied with CFCs and released sulphur hexafluoride |
title_sort |
east greenland current studied with cfcs and released sulphur hexafluoride |
publisher |
Elsevier |
publishDate |
2005 |
url |
https://hdl.handle.net/1956/777 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Denmark Strait East Greenland east greenland current Fram Strait Greenland Greenland Sea Iceland |
genre_facet |
Arctic Arctic Ocean Denmark Strait East Greenland east greenland current Fram Strait Greenland Greenland Sea Iceland |
op_relation |
urn:issn:0924-7963 https://hdl.handle.net/1956/777 |
_version_ |
1766318291384532992 |