Drifting effect of the continental cap on the oceanic response: the tidal torque of a hemispheric ocean is plotted as a function of the forcing semi-diurnal frequency for different positions of the center of the ocean. With longitudinal symmetry, the latter is defined by the latitude of the oceanic center, which evolves according to Figure 1. The drifting effect on the resonances ranges from position shifting and attenuation for small forcing frequencies to major distortion in the spectrum at larger frequencies. Extreme distortion occurs in the polar oceanic scenario: the major resonance around 11 rad/day reaches a maximum relative to other configurations and the rest of the resonances are absorbed into the background leaving a unimodal spectrum. This behavior makes it important to take into account the position of the hemispherical cap into the model (Figure 1).