Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/44510
Título: Seamounts and organic matter-Is there an effect? The case of Sedlo and Seine Seamounts: Part 1. Distributions of dissolved and particulate organic matter
Autores/as: Vilas, J. C.
Arístegui, J. 
Kiriakoulakis, K.
Wolff, G. A.
Espino, M. 
Polo, Irene
Montero, M. F. 
Mendonça, A.
Clasificación UNESCO: 2510 Oceanografía
Palabras clave: North Atlantic
Sedlo
Seine
Seamounts
Organic matter, et al.
Fecha de publicación: 2009
Publicación seriada: Deep-Sea Research Part II: Topical Studies in Oceanography 
Resumen: The temporal and spatial variability in the water-column distribution of dissolved organic carbon (DOC), and the particulate organic matter, collected both with bottles (POM-b) and in situ pumps (POM-p), was studied around Sedlo and Seine, two seamounts located in subtropical waters of the northeast Atlantic Ocean. Seine and Sedlo presented high POM-b concentrations, compared with reported background concentrations from the Azores-Madeira region, although our results show large regional, temporal and intra-seamount variability around the two seamounts. On the contrary, the POM-p pool, which contributed only 25–56% of the POC-b at surface, represented a fairly constant fraction of the suspended POM. Seine was characterized by higher POC-b concentrations than Sedlo, presumably as result of a combined mechanism of advection from the far field, and retention/accumulation of organic carbon, favoured by the secondary circulation around the seamount. Passive accumulation of POM-b was also evident at the southern flank of Sedlo during one the surveys, coinciding with a change in the local circulation around the seamount caused by the intrusion of a Mediterranean water eddy (Meddy). Average PON concentrations at the two seamounts were comparable in magnitude, and hence the C/N ratios were higher in Seine, adding support to the hypothesis of advection of allochtonous highly refractory organic matter into Seine. The contribution of DOC to the apparent oxygen utilization (AOU) in the upper 1000 m was significantly higher in Seine (25%) than in Sedlo (11%). This points to a proportionally more important role of dissolved material to the overall carbon remineralization rates in the water column of Seine.
URI: http://hdl.handle.net/10553/44510
ISSN: 0967-0645
DOI: 10.1016/j.dsr2.2008.12.023
Fuente: Deep-Sea Research Part II: Topical Studies in Oceanography [ISSN 0967-0645], v. 56 (25), p. 2618-2630
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