Abstract
Abstract An analytical study investigates the influence of a mid-ocean ridge in a barotropic ocean on the energy radiation by wind-driven, quasi-geostrophic, linear Rossby waves. The ocean basin is bounded on the east and west by meridional boundaries and is separated in its middle by a north-south ridge with zonal exponential depth profiles. The forcing function is oscillatory, either propagative or not, and represented by one or a linear combination of plane waves. The excitation frequencies range from a week to about six months (the chosen spin-down time for Rossby waves). High-frequency forcings (about 10-days period) excite basin-size topographic Rossby-modes propagating westward along the f/h contours. Low-frequency forcings (several-week period) excite Rossby-modes relative to each half basin, but modified by the bottom slope. At very low-frequencies (several-month period), Rossby wave reflection and bottom friction set up a boundary layer at the western boundary of the basin but no such sign signi...
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