ICONGETM v1.0 – flexible NUOPC-driven two-way coupling via ESMF exchange grids between the unstructured-grid atmosphere model ICON and the structured-grid coastal ocean model GETM

Abstract. Two-way model coupling is important for representing the mutual interactions and feedbacks between atmosphere ocean dynamics. This work presents development of two-way coupled system ICONGETM, consisting ICON GETM. ICONGETM built on latest NUOPC software with flexible data exchange conservative interpolation via ESMF grids. With providing a state-of-the-art kernel numerical weather prediction an unstructured mesh GETM being established coastal model, especially suited high-resolution studies. For demonstration purposes newly developed has been applied to upwelling scenario in central Baltic Sea.