The basic vertical profiles of potential temperature and salinity are from summer time climatology in the Kuril Basin of the Okhotsk Sea. This stratification is appropriate for estimating the upper limit of the effect of tidal mixing on intermediate layer freshening, because the water outflows from the Kuril Basin to the North Pacific and because salinity in the surface layer is lowest at summer time. With these vertical profiles, the initial stratification is set to be horizontally uniform. Model calculations start at the beginning of rightward flow (i.e., from the North Pacific to the Okhotsk Sea) so that wave generation processes can be seen clearly.
At the bottom boundary, a no-slip condition is imposed in the sill region and a free-slip condition is imposed in the deep region with the flat bottom. A rigid-lid approximation is used at the surface to restrict our attention to internal processes.
