Toward a Dynamically Consistent Boundary Forcing

Jeroen Molemaker (UCLA)
Evan Mason (ULPGC)
Sasha Shchepetkin (UCLA)
Francois Colat (UCLA)

The introduction of a new set of open boundary conditions in ROMS allows for a more accurate representation of flow dynamics near the boundaries of the domain. We will show several ways in which the dynamical consistency of the supplied boundary forcing can be improved within the context of off line, one way nested ROMS grids. It is shown that the improved dynamical consistency leads to a dramatical reduction of interior-boundary flow mismatches and accompanying boundary rim currents. Additionally, we'll show how the solution at the outermost ROMS grid can be successfully forced by using a combination of Word Ocean Atlas and absolute SSH data at the boundaries.