Internal tides responsible for lithogenic inputs along the Iberian
continental slope
Abstract
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.