ON THE PERMEABILITY OF THE MALVINAS CURRENT

SIMIONATO, C. G.; BODNARIUK, N.; SARACENO, M.; BERÓN-VERA, F.

Miami

Congreso; 2017 Ocean Surface Topography Science Team Meeting; 2017

CPAESS

We investigate the permeability of the Malvinas Current over a period well sampled by satellite altimetry usinggeometric andprobabilistic nonlinear dynamic techniques for Lagrangian coherence detection. The geometric technique buildson notions of strain and shear expressible through the invariants of an appropriate time average of the right Cauchy-Green strain tensor. The probabilistic technique uses a transfer operator based on short-run trajectories which renders the dynamics autonomous and provides a globale evolution perspective. In agreement with in-situ and remote observations, both seemingly different approaches to Lagrangian coherence detection consistently reveal recurrent water instrusions over the continental shelf, which are verified by direct trajectory integrations. Implications of these instrusions for biology and geochemistry are discussed.