Physical/biogeochemical modelling of the global coast with ICON-coast – the impact of continental runoff

ICON-coast is the coastal version of the newly developed global ocean model ICON-O, which is itself part of the ICON (Icosahedral Non-hydrostatic) earth system modelling framework, developed by the Deutscher Wetterdienst and the Max-Planck-Institute for Meteorology. ICON-coast uses an unstructured, triangular computational mesh with a regular bisection-type mesh refinement technique to increase the horizontal resolution along the global coast. The global tides are included and crucial shelf-specific processes are added to the pre-installed biogeochemical sub-model (HAMMOC). Furthermore, an interface to the FABM 1.0 framework was implemented, which enables a coupling with the biogeochemical model ECOSMO. We present first ICON-coast/ECOSMO experiments in order to investigate the impact of the continental runoff and its related eutrophication on the global coastal ecosystem.