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| Reinaud, Jean N.; Carton, Xavier; Dritschel, David G.. |
| We investigate the interaction between a heton and a current generated by a filament of buoyancy anomaly at the surface. Hetons are baroclinic dipoles consisting of a pair of vortices of opposite signs lying at different depths. Such structures have self-induced motion whenever the pair of vortices are offset horizontally. A surface buoyancy filament generates a shear flow since the density perturbation locally modifies the pressure field. The vertical shear induced by the filament offsets the vortices of the heton if vertically aligned initially. Moreover, if the vortex nearer the surface is in adverse horizontal shear with the buoyancy filament, the heton tends to move towards the filament. Conversely, if the upper vortex is in cooperative horizontal... |
| Tipo: Text |
Palavras-chave: Quasi-geostrophy; Surface buoyancy anomaly; Vortex dynamics. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00600/71253/69631.pdf |
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