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Basin-scale changes of total organic carbon profiles in the eastern South Atlantic

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dc.creator Pérez, Fiz F.
dc.creator Ríos, Aida F.
dc.creator Álvarez-Salgado, Xosé Antón
dc.creator Doval, M. Dolores
dc.date 2008-06-25T10:10:14Z
dc.date 2008-06-25T10:10:14Z
dc.date 2001
dc.date.accessioned 2017-01-31T01:48:57Z
dc.date.available 2017-01-31T01:48:57Z
dc.identifier Scientia Marina 65(1): 1-10 (2001)
dc.identifier 0214-8358 (print edition)
dc.identifier 1886-8134 (online edition)
dc.identifier http://hdl.handle.net/10261/5311
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5311
dc.description Publicación online disponible en: http://www.icm.csic.es/scimar/index.php
dc.description Total organic carbon (TOC) samples were collected at 6 stations spaced ~800 km apart in the eastern South Atlantic, from the Equator to 45°S along 9°W. Analyses were performed by high temperature catalytic oxidation (HTCO) in the base laboratory. Despite the complex advection and mixing patterns of North Atlantic and Antarctic waters with extremely different degrees of ventilation, TOC levels below 500 m are quasi-constant at 55±3 µmol C l-1, pointing to the refractory nature of deep-water TOC. On the other hand, a TOC excess from 25 to 38 g C m-2 is observed in the upper 100 m of the permanently stratified nutrient-depleted Equatorial, Subequatorial and Subtropical upper ocean, where vertical turbulent diffusion is largely prevented. Conversely, TOC levels in the nutrient-rich upper layer of the Subantarctic Front only exceeds 9 g C m-2 the deep-water baseline. As much as 70% of the TOC variability in the upper 500 m is due to simple mixing of reactive TOC formed in the surface layer and refractory TOC in deep ocean waters, with a minor contribution (13%) to oxygen consumption in the prominent subsurface AOU maximum at 200-400 m depth.
dc.description Financial support for this work came from the Spanish ‘Comisión Interministerial de Ciencia y Tecnología (CICYT)’, contract No. ANT94-1168-E, and from the ‘Institut Français de Recherche pour l’exploitation de la Mer (IFREMER)’, contract No 94 1430 087. A fellowship from the EC MAS2 project CT93-0065 allowed M.D. Doval to carry out this work. X.A.A.-S. was partially funded by a ‘Contrato de Incorporación’ of the Spanish ‘Ministerio de Educación y Ciencia’.
dc.description Peer reviewed
dc.format 313109 bytes
dc.format application/pdf
dc.language eng
dc.publisher CSIC - Instituto de Ciencias del Mar (ICM)
dc.rights openAccess
dc.subject Dissolved Organic Carbon (DOC)
dc.subject Apparent Oxygen Utilisation (AOU)
dc.subject Stratification
dc.subject Mixing
dc.subject Water masses
dc.subject SE Atlantic Ocean
dc.title Basin-scale changes of total organic carbon profiles in the eastern South Atlantic
dc.type Artículo

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