Throughout my research history, I have had opportunities to investigate different physical processes of our oceans and coastal regions from regional to local scales.
My early career research focused on rip current dynamics and vortices as well as the morphodynamical evolution of sandy coasts. I developed and used wave / circulation / sediment transport coupled models, combined with field campaigns and data analysis to improve understanding of the hydro- and morpho-dynamics of coastal regions as well as the impact of climate change.
More recently, I have worked on regional scale ocean and atmosphere dynamics :
Figure: Fully-coupled atmosphere-ocean-waves system. Evolution of the SST (left), 10m winds (centre) and wave height (right) for an idealized bathymetry. Dashed line represents the edge of the continental shelf while the plain line represents the coast. See Bruneau et al. (2018, Scientific Reports).
Figure: Surge differences between a traditional tropical cyclone wind profile formulation and a wind profile model allowing maximum winds on the left-hand-side of the moving track (as it might be exhibited during the transitioning phase) for an ensemble of around 200 historical tracks.
Figure: Left, storm surge observations at different location in the Bay of Biscay. Right, modeled storm surge maximum footprint and time serie comparisons with observations for the three stations where the storm surge was the largest. Presence of 6h oscillations after landfall induced by the phenomenon of resonnance when the storm crosses the continental shelf.
Figure: Top: Panoramic view of the Óbidos lagoon; bottom: 5month morphodynamic evolution (from April 2002 to August 2002) of the Óbidos inlet obtained with MORSYS2D compared to a aerial shot.
Figure: Left: Rythmic Transverse Bar and Rip (TBR) morphologies observed on the French Aquitanian Coast (during the PNEC 2001 field experiment); top right: Averaged rip current velocities measured during the Biscarrosse 2007 field experiment with the presence of Very Low Frequency pulsations; center: topographically-controlled wave-driven circulations; bottom: photography of the instrumented TBR system at Biscarrosse Beach (2007).
Figure: Development of rythmic crescentic patterns from a perturbated uniform alongshore bars at 3 different instant to underline processus of self-organisation. Right panels shows bar and rips classification proposed by Wright and Short (1984).
Figure: Aerial view of a double sandbar system on the French Aquitanian Coast (top); example of morphological coupling between the inner and the outer bars (bottom).
Figure: Application of the model to a 2DV laboratory case (Grasso et al., 2009). From top to bottom, the significant wave height (Hs), set-up, cross-shore observed vs modeled velocities at 6cm from the bottom, the bathymetry, the Hs + breaking wave rate and the modeled vertical cross-shore velocities. Black plain line represents the model results and blue dots the observations.