Artículos de revistas
Tide-topography interaction along the eastern Brazilian shelf
Fecha
2005-08-01Registro en:
Continental Shelf Research. Oxford: Pergamon-Elsevier B.V., v. 25, n. 12-13, p. 1521-1539, 2005.
0278-4343
10.1016/j.csr.2005.04.008
WOS:000231045300005
Autor
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Univ Santa Cruz
Institución
Resumen
In the Tropics, continental shelves governed by western boundary currents are considered to be among the least productive ocean margins in the world, unless eddy-induced shelf-edge upwelling becomes significant. The eastern Brazilian shelf in the Southwest Atlantic is one of these, and since the slight nutrient input from continental sources is extremely oligotrophic. It is characterized by complex bathymetry with the presence of shallow banks and seamounts. In this work, a full three-dimensional nonlinear primitive equation ocean model is used to demonstrate that the interaction of tidal currents and the bottom topography of the east Brazil continental shelf is capable of producing local upwelling of South Atlantic Central Water, bringing nutrients up from deep waters to the surface layer. Such upper layer enrichment is found to be of significance in increasing local primary productivity. (c) 2005 Elsevier Ltd. All rights reserved.