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Internal tides responsible for lithogenic inputs along the Iberian continental slope
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  • Simon Barbot,
  • Marion Lagarde,
  • Florent Henri Lyard,
  • Patrick Marsaleix,
  • Pascale Lherminier,
  • Catherine Jeandel
Simon Barbot

Corresponding Author:[email protected]

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Marion Lagarde
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Florent Henri Lyard
Pôle d'Océanographie Côtière de l'Observatoire Midi-Pyrénées (LEGOS), Pôle d'Océanographie Côtière de l'Observatoire Midi-Pyrénées (LEGOS)
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Patrick Marsaleix
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Pascale Lherminier
Ifremer, Ifremer
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Catherine Jeandel
LEGOS, LEGOS, UMR CNRS 5566, Université Paul Sabatier, CNRS, IRD, CNES
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This study proposes new insights for the interpretation of GEOVIDE particle measurements. Potentiel resuspension sites due to internal tides (ITs) have been identified along the western Iberian shelf slope using a tidal regional model. Iberian shelf is mainly a source of lithogenic material whereas Galicia Bank is a source of biogenic matter. The potential pathways for particles from the resuspension sites toward the GEOVIDE stations are identified using IBIRYS reanalysis to infer their transport by the ocean circulation. It appears that each station is influenced by a specific pathway and mixed particles from several resuspension sites. This methodology reveals that the criticality of the bathymetry slope, commonly used to track resuspension sites from internal waves, is not sufficient to investigate ITs. An explicit resolution of ITs using a numerical tidal model is required for an exhaustive identification of the resuspension sites.
Oct 2022Published in Journal of Geophysical Research: Oceans volume 127 issue 10. 10.1029/2022JC018816