Influence of the summer deep-sea circulations on passive drifts among the submarine canyons in the northwestern Mediterranean Sea

摘要: Abstract. Marine biophysical models can be used to explore the displacement of individuals in and between submarine canyons. Mostly, studies focus on shallow hydrodynamics or around a single canyon. In the northwestern Mediterranean Sea, knowledge of deep-sea circulation and its spatial variability three contiguous canyons is limited. We Lagrangian framework with three-dimensional velocity fields from two versions Regional Ocean Modeling System (ROMS) to study deep-bottom connectivity compare their influence on particle transport. From biological point view, the particles represented eggs larvae spawned by commercial shrimp Aristeus antennatus along continental slope summer. The passive mainly followed southwest drift drifted less than 200 km considering pelagic larval duration (PLD) 31 d. Two the submarine were connected more than 27 % if they were released at sea bottom depths above 600 m. vertical advection of particles depended depth where released the circulation influenced morphology each canyon. Therefore, impact transport should studied case-by-case basis not generalized. Because the flows strongly topography, the hydrodynamic model finer bathymetric resolution data, smoothed bottom sigma-layer near should give accurate simulations near-bottom drift. Those results propose that physical parameterization discretization have to be considered for improving species.