Building the future by doing more together

ISCAD – Inner shore circulation and dispersion patterns: Interactions with estuarine systems.
Coordinator - Jesús M. Pedreira Dubert
Programme - PTDC/MAR/65760/2006
Execution dates - 2008-08-01 - 2011-07-31 (36 Months)
Funding Entity - FCT
Funding for CESAM - 174475 €
Total Funding - 182655 €
Proponent Institution - Universidade de Aveiro
Participating Institutions
Instituto Nacional de Investiggação Agrária e das Pescas (INIAP)

Despite much intensive research studies of the physical oceanography of the middle and outer shelf, few studies have focussed on the waters close to the shore. There remains a gap in the knowledge of the processes that control the circulation in the coastal band, (from the coast to about 40m) and the exchange of coastal waters with the estuarine systems. ISCAD project intend to contribute to fill this gap, by studying the physical process that governs the ocean circulation at the inner shelf, like: coastal nearshore wind driven currents and countercurrents, internal tides, interaction of sea-breeze with coastal circulation, coastal front generation and dissipation, tidal currents, and the interaction of the above referred phenomena with estuarine systems, particularly with Ria de Aveiro lagoon. It intends also to study the importance of those phenomena on the dispersion and transport phenomena, with especial emphasis (but not restricted to) on larvae of marine invertebrates (Carcinus maenas), focussing on the understanding of the process supply of larvae in the neighbourhood of the estuarine systems, like the Ria de Aveiro. For that goal, two kind of tools will be used: observations and numerical modelling. Observations will include hydrology, larvae sampling, current profilers and temperature sensor moorings. The own value of the observations will be increased by the integration with advanced three-dimensional numerical modelling, using state of the art models of the ocean (ROMS, Regional Ocean Modelling System) and the atmosphere (WRF, Weather and Forecasting Model), which will run in offline coupling mode. It is intended to set-up numerical nested configurations with unprecedented high resolution (three hundred meters grid) in order to solve the meso and submesoescale processes of North Western Portugal inner shelf, and the water (and other properties) exchange with estuarine systems, like Ria de Aveiro. Initial and boundary conditions will be obtained from large scale assimilated models, by using state of the art nesting techniques consisting in the Regional Ocean Modelling System (ROMS) with Adaptive Grid Refinement in Fortran ROMS-AGRIF. A Lagrangian Individual Based Model (IBM) will be coupled to ROMS AGRIF to simulate larval evolution, diel vertical migrations and sub-grid scale diffusion, in order to make the link with the larval sampling and analyses.

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