The East Greenland Current studied with CFCs and released sulphur hexafluoride

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Olsson, Anders,1970Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry (author)

The East Greenland Current studied with CFCs and released sulphur hexafluoride

Article/chapterEnglish2005

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Elsevier BV,2005

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LIBRIS-ID:oai:gup.ub.gu.se/57017
https://gup.ub.gu.se/publication/57017URI
https://doi.org/10.1016/j.jmarsys.2004.07.019DOI

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Language:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

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 bexafluoride (SF6) together with hydrographic data. Water masses contributing to the Denmark Strait overflow, and to some extent also contributions to the Iceland-Scotland over-flow, 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. (c) 2004 Elsevier B.V. All rights reserved.

Subject headings and genre

NATURVETENSKAP Kemi hsv//swe
NATURAL SCIENCES Chemical Sciences hsv//eng
tracers
overflow
intermediate water masses
deep-water masses
chlorofluorocarbons
sulphur hexafluoride
Nordic Seas
East Greenland
Current
Greenland Sea
Denmark Strait
DENMARK STRAIT OVERFLOW
ARCTIC MEDITERRANEAN SEAS
DEEP
NORTH-ATLANTIC
EURASIAN BASIN
NORWEGIAN SEAS
NORDIC SEAS
THERMOHALINE CIRCULATION
CARBON-TETRACHLORIDE
WATER MASSES
ICELAND
SEA

Added entries (persons, corporate bodies, meetings, titles ...)

Jeansson, Emil,1972Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper, oceanografi,Department of Earth Sciences, Oceanography(Swepub:gu)xjeaem (author)
Tanhua, Toste,1965Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry (author)
Gascard, J. C (author)
Göteborgs universitetInstitutionen för kemi (creator_code:org_t)

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In:Journal of Marine Systems: Elsevier BV55:1-2, s. 77-950924-7963

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