The Advantage Of A Generic Coordinate
Approach For Ocean Modelling
Author(s)
R. Neves, P. Leitao, F. Braunschweig, F. Martins, H. Coelho,
A. Santos & R. Miranda
Abstract
A main concern in three-dimensional coastal and oceanic modelling is the type
of coordinate used for the vertical direction. The appropriate coordinate system
should guarantee an adequate resolution in the entire domain and must lead to a
stable method with minimal numerical diffusion in order to preserve the vertical
structure of the water column. The need for meshes with high aspect ratios of up
to 1000:1 makes ocean models highly sensitive to vertical fluxes. A diversity of
vertical coordinates has been used in ocean modelling; cartesian, sigma and
isopycnic are now widespread. Sigma coordinates are more indicated when
topography plays a main role in the flow, while isopycnic coordinates are the
most indicated when density is the major
Keywords
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