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Offshore export versus in situ fractionated mineralization: a 1-D model of the fate of the primary production of the Rías Baixas (Galicia, NW Spain)

AutorTorres López, S.; Álvarez-Salgado, Xosé Antón ; Varela, R. A.
Palabras clave1-D model
Hydrodynamics
Biogeochemistry
Mineralization
Coastal upwelling
Rías Baixas
Fecha de publicación2005
EditorElsevier
CitaciónJournal of Marine Systems 54(1-4): 175-193 (2005)
ResumenA linked hydrodynamic mineralization model is described and used to evaluate offshelf fluxes and fractionated mineralization of particulate phytogenic materials in the coastal upwelling system of the Rías Baixas (NW Spain), under three different typical situations of the upwelling season. The simulations made indicate that the intensity of upwelling controls: (a) net community production (NCP); (b) particulate organic matter (POM) accumulation; (c) in situ mineralization; and (d) matter export in the ‘Rías Baixas.’ Under strong upwelling conditions, there is an important horizontal offshelf flux, having only a small mineralization effect on NCP; if weak upwelling conditions are simulated, POM export is dramatically reduced and in situ mineralization is significantly enhanced; finally, under average upwelling conditions, the offshelf export of POM is about one third of the POM accumulation inside the domain, evidencing its importance in the productivity enhancement of near-shore areas. According to our sensitivity tests, the net vertical velocity (water velocity plus sinking velocity) has a critical role in the C/N/P stoichiometry of POM
Descripción19 pages, 6 figures, 7 tables
Versión del editorhttps://doi.org/10.1016/j.jmarsys.2004.07.011
URIhttp://hdl.handle.net/10261/169771
DOI10.1016/j.jmarsys.2004.07.011
ISSN0924-7963
E-ISSN1879-1573
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