Multiscale modelling of biogeochemical fluxes along the Scheldt land-sea continuum

Randresihaja, Ny Riana;et.al.
(2022) FOCUS-Day — Location: Liège, Belgique (13.December.2022)

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The multi-scale interactions between river and ocean are poorly understood. With this project, we aim to quantify these multi-scale interactions along the river- estuary-ocean- atmosphere continuum from hourly to multi-annual time scales over the Scheldt-North Sea region. In particular, we will assess how the physical and biogeochemical dynamics of the North Western Continental Shelf (NWCS) and Southern Bight of the North Sea (SBNS) are influenced by the small-scale variability of the Scheldt river-estuary and the atmosphere. For solving the multiscale interactions along the land sea continuum, we propose to develop an unstructured (finite-elements) grid model. Then coupling this model with a structured (finite-differences) grid model, for fully resolving in three dimensions the continuum of scales and processes from a few hundreds of meters up to several tens of kilometers. For the atmosphere, we will assess the impact of atmospheric forcing resolution provided by the regional climate model MAR on the quality of ocean prediction over the NWCS. Simulations coupling in 1-way will be done to assess the impact of weather events (e.g. storms, heat wave) on the ocean physics. From a biogeochemical point of view, the modelling system developed will offer an optimal way to quantify the transfer of organic and inorganic materials (e.g. suspended particulate materials, SPM) from the land to the sea and to track pollution events.
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Randresihaja, N. R., & et al. (2022). Multiscale modelling of biogeochemical fluxes along the Scheldt land-sea continuum. FOCUS-Day, Liège, Belgique. https://hdl.handle.net/2078.5/273760