Formation of Denmark Strait overflow water and its hydro-chemical composition

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Fältnamn	Indikatorer	Metadata
000		04202naa a2200553 4500
001		oai:gup.ub.gu.se/57013
003		SwePub
008		240910s2005 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://gup.ub.gu.se/publication/570132 URI
024	7	a https://doi.org/10.1016/j.jmarsys.2005.05.0032 DOI
040		a (SwePub)gu
041		a eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Tanhua, Toste,d 1965u Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry4 aut
245	1 0	a Formation of Denmark Strait overflow water and its hydro-chemical composition
264	1	b Elsevier BV,c 2005
520		a The dense overflow across the Denmark Strait is investigated with hydrographic and hydro-chemical data and the water mass composition of the Denmark Strait Overflow Water (DSOW) is determined by multivariate analysis. Hydrographical properties, the transient tracers CFC-11 and CFC-12, oxygen and nutrients are utilized for the water mass definitions. Distribution and characteristics of water masses north of Denmark Strait are described, the important water masses at the sill and the variability on weekly time-scales are discussed, and the entrainment and mixing of water into the overflow plume in the northern Irminger Basin is calculated. The analysis indicates that water masses both from the Nordic Seas and the Arctic Ocean are important for the formation of DSOW. It is found that water masses transported with the East Greenland Current make up about 75% of the overflow at the sill. The overflow at, and shortly south of, the sill is inhomogeneous with a low-salinity component dominated by Polar Intermediate Water. The high-salinity component of the overflow is mainly of Arctic origin. The water mass composition, and the short-term variability for 7 repeats of sections close to the sill are described, and these illustrate that the overflow is in fact a composite of a number of water masses with different formation and transport histories. This indicate that the overflow is a robust feature, but that it responds to variations in the circulation or atmospheric forcing that influences the formation of intermediate and deep water masses within the Arctic Mediterranean and the North Atlantic. At a section about 400 kin south of the sill the overflow is well mixed and modified by entrainment of, mainly, Iceland-Scotland Overflow Water and Labrador Sea Water, together constituting 30% of the overflow plume. The entrainment of Middle Irminger Water dominates shortly downstream of the sill, before the overflow plume reaches too deep but the entrainment seems to be intermittent in time. (c) 2005 Elsevier B.V. All rights reserved.
650	7	a NATURVETENSKAPx Kemi0 (SwePub)1042 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciences0 (SwePub)1042 hsv//eng
653		a thermohaline circulation
653		a overflow
653		a water mixing
653		a Freon tracers
653		a chemical properties
653		a North Atlantic
653		a Nordic Seas
653		a Denmark strait
653		a 60-70
653		a degrees N
653		a 20-40 degrees W
653		a EAST GREENLAND CURRENT
653		a MID-DEPTH CIRCULATION
653		a NORTH-ATLANTIC OCEAN
653		a GIBBS FRACTURE-ZONE
653		a DEEP-WATER
653		a NORDIC SEAS
653		a IRMINGER SEA
653		a SCOTLAND
653		a RIDGE
653		a MASS FORMATION
653		a LABRADOR SEA
700	1	a Olsson, Anders,d 1970u Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry4 aut0 (Swepub:gu)xoandq
700	1	a Jeansson, Emil,d 1972u Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper, oceanografi,Department of Earth Sciences, Oceanography4 aut0 (Swepub:gu)xjeaem
710	2	a Göteborgs universitetb Institutionen för kemi4 org
773	0	t Journal of Marine Systemsd : Elsevier BVg 57:3-4, s. 264-288q 57:3-4<264-288x 0924-7963
856	4 8	u https://gup.ub.gu.se/publication/57013
856	4 8	u https://doi.org/10.1016/j.jmarsys.2005.05.003

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