A homogenization technique is used to study the change in the frequency of planetary Rossby waves that results from their interaction with a small-scale two-dimensional topography. The frequency change is computed explicitly for a topography consisting of a random distribution of well-separated cylindrical seamounts; it corresponds to a phase-speed increase (decrease) when the hat-bottom Rossby wave frequency is larger (smaller) than a typical topographic frequency. The topography is also shown to lead to a finite damping of the Rossby waves, even in the limit of infinitesimally small Ekman friction.
|Number of pages||7|
|Journal||Journal of Physical Oceanography|
|Publication status||Published - Jul 2000|
- EXTRATROPICAL PLANETARY-WAVES
- STRATIFIED OCEAN
- VARIABLE DEPTH