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We evaluate the influence of local resolution, eddy viscosity, coastlinestructure, and boundary conditions on the numerical representation of boundarycurrents in a finite element shallow-water model. The use of finite elementdiscretization methods offers a higher flexibility compared to finitedifference and finite volume methods, that are mainly used in previouspublications. This is true for the geometry of the coast lines and for therealization of boundary conditions. For our investigations we simulate steadyseparation of western boundary currents from idealized and realistic coastlines. The use of grid refinement allows a detailed investigation of boundaryseparation at reasonable numerical cost.

The representation of boundary currents in a finite element shallow water model