The variation with frequency of the long‐period tides

The oceanic response to long‐period tidal forcing in closed basins approaches equilibrium for periods much longer than a month for moderate values of dissipation. At a given frequency the response is closest to equilibrium near the eastern wall of the basin. Global calculations of the Mf and Mm tides, made using a 2°×2° grid, are presented. Changes in the length of day have also been computed for these tides.