Kinetic energies of tidally excited fluid motions as functions of the tidal forcing frequency, $\widehat{\omega }$, when the full tidal potential is taken into account (blue) and when the tidal forcing is effectively described using the equilibrium tidal flow (orange). The dashed orange line also corresponds to the split formulation but with different boundary conditions (see text), while the solid green line corresponds to the modes obtained only with the effective tidal forcing, f_t, due to Coriolis force. Pure g-modes frequencies (black, Eq. (33)) and negative g-modes (red) are designated by a cross. A Rossby mode resonance is highlighted at $\widehat{\omega }=-0.9{\mathrm{\Omega }}_s/3$.