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| Titel |
Application of a lagrangian transport model to organo-mineral aggregates within the Nazaré canyon |
| VerfasserIn |
S. Pando, M. F. Juliano, R. García, P. A. de Jesus Mendes, L. Thomsen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 6 ; Nr. 10, no. 6 (2013-06-20), S.4103-4115 |
| Datensatznummer |
250018303
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| Publikation (Nr.) |
 copernicus.org/bg-10-4103-2013.pdf |
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| Zusammenfassung |
| In this study, a hydrodynamic model was applied to the Nazaré submarine
canyon with boundary forcing provided by an operational forecast model for
the west Iberian coast for the spring of 2009. After validation, a lagrangian
transport model was coupled to the hydrodynamic model to study and compare
the transport patterns of three different classes of organo-mineral
aggregates along the Nazaré canyon. The results show that the transport
in the canyon is neither constant, nor unidirectional and that there are
preferential areas where deposited matter is resuspended and redistributed.
The transport of the larger class size of organo-mineral aggregates
(2000 μm and 4000 μm) is less pronounced, and a decrease
in the phytodetrital carbon flux along the canyon is observed. During the
modelled period, the Nazaré canyon acts as a depocentre of sedimentary
organic matter rather than a conduit of organo-mineral aggregates to the deep
sea, as has been reported by other authors. The results of this study are
crucial for the understanding of the oceanic carbon sequestration at the
continental margin, and therefore important for evaluating the role of
submarine canyons within the global carbon cycle. |
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