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Title: Mixing analysis of nutrients, oxygen and inorganic carbon in the Canary Islands region
Authors: Pérez, Fiz F.
Mintrop, Ludger
Llinás Gonzalez, Octavio 
Glez-Dávila, Melchor 
Castro, Carmen G.
Alvarez, Marta
Körtzinger, Arne
Santana-Casiano, Magdalena 
Rueda, M. J. 
Ríos, Aida F.
UNESCO Clasification: 251002 Oceanografía química
Keywords: Water masses
North Atlantic
Issue Date: 2001
Publisher: 0924-7963
Journal: Journal of Marine Systems 
Abstract: We show the distribution of nutrients, oxygen, total dissolved inorganic carbon (CT) and total alkalinity (AT) along three sections close to the Canary Islands, between 18°W and the African coast during Meteor 37/2 cruise (January 1997). From the thermohaline properties of Eastern North Atlantic Central Water (ENACW), Mediterranean Water (MW), Antarctic Intermediate Water (AAIW) and North Atlantic Deep Water (NADW), a mixing model has been established based on the water mass description. It can explain most of the variabilities found in the distribution of the chemical variables, including the carbon system, and it is validated through the use of conservative chemical variables like ‘NO.’ From nutrients, oxygen, AT and CT, the chemical characterisation of the water masses was performed by calculating the concentration of these variables in the previously defined thermohaline end-members. The relative variation of nutrient concentrations, resulting from the regeneration of organic matter, was estimated. Close to the African shelf-break, a poleward undercurrent conveying as much as a 11% of AAIW was observed only in the southern section (28.5°N). From the chemical and thermohaline properties of the end-members, a comparison with data from other oceanic regions was made in respect to conservative chemical variables (‘NO’). In addition, a north–south gradient in the ventilation pattern of water masses is observed from the residuals of the model.
ISSN: 0924-7963
DOI: 10.1016/S0924-7963(01)00003-3
Source: Journal of Marine Systems [ISSN 0924-7963], v. 28, p. 183-201
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