Participant contribution

Mesoscale three-dimensional Lagrangian Coherent Structures

  • Author: Joao Bettencourt, IFISC.

  • Names of other authors: Cristóbal López, Emilio Hernández-García.

  • Oral or poster: oral.

  • Abstract:
    We study three dimensional oceanic Lagrangian Coherent Structures (LCSs) in the Benguela region, as obtained from an output from the ROMS model. To this end we first compute Finite-Size Lyapunov exponent (FSLE) fields in the region volume, characterizing mesoscale stirring and mixing there. LCSs are extracted as ridges of the calculated FSLE fields. They present a "curtain-like" geometry in which the strongest attracting and repelling structures appear as quasivertical surfaces. LCSs around a particular cyclonic eddy, pinched off from the upwelling front are also calculated. The LCSs are confirmed to provide pathways and barriers to transport in and out of the eddy.
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