Các nghiên cứu trong vật lý được chia ra làm hai loại riêng biệt, vật lý lý thuyết và vật lý thực nghiệm. Từ thế kỷ thứ 20, đa phần các nhà vật lý thuộc một trong hai lĩnh vực này; chỉ có một số ít các nhà vật lý thành công trên cả hai lĩnh vực cùng một lúc. | 3 Oceanic Vortices 95 Fig. Baroclinic dipole formation and ejection from an unstable coastal current from Cherubin etal. 34 Kelvin-like modes those previously observed for frontal instability and Rossby-like modes related to baroclinic instability . Baey et al. 8 show that the instability of identical jets is stronger in the SW model than in the quasi-geostrophic model and that anticyclones seem to appear more often and are larger than cyclones in the former model. Chérubin et al. 33 investigate the linear stability of a two-dimensional coastal current composed of two adjacent uniform vorticity strips and found evidence of dipole formation when the instability is triggered by a canyon. In contrast stable flows made of a single vorticity strip shed filaments near deep canyons. Capet and Carton 22 study the nonlinear regimes of the same QG flow over a flat bottom or over a topographic shelf. They find that the critical parameter for water export offshore is the distance from the coast where the phase speed of the waves equals the mean flow velocity. Chérubin et al. 34 study the baroclinic instability of the same flow over a continental slope with application to the Mediterranean Water MW undercurrents vortex dipoles similar to the dipoles of MW can form for long waves when layerwise PV amplitudes are comparable but of opposite sign see Fig. . This confirms the Stern et al. 151 results of laboratory experiments and primitive-equation modeling which show that dipoles can form from unstable coastal currents as in two-dimensional flows. Vortex Generation by Currents Encountering a Topographic Obstacle The interaction of a flow with an isolated seamount is a longstanding problem in oceanography and in a homogeneous fluid the classical solution of the Taylor column is well known. When the flow varies with time when the fluid is stratified or when the topographic obstacle is more complex several studies have provided essential results on vortex generation. .
