Leibniz MMS Days 2019 - Abstract

Bauer, Tobias

First results on two-way coupled model ICONGETM for the Central Baltic Sea

To understand local phenomena over the Baltic Sea such as Coastal Upwelling or Salinity Inversion, we are coupling an atmosphere and ocean model with the Earth System Modelling Framework (ESMF). For the atmosphere, the operational model of the German Weather Service (ICON) is used in a nested limited area mode. The General Estuarine Turbulence Model (GETM) has been chosen as the local ocean model.
Typical coupling issues are the different grid schemes of the models and hence, a set and choice of suitable interpolation/regridding methods is required. Within our framework, the state variables (e.g. temperature) and flux data (e.g. heat flux) have to be interpolated from ICON to GETM and vice versa. This presentation will give an overview about the coupling strategy we have applied. Furthermore, the results of first model runs are presented for the Central Baltic Sea. At first, we show results of uncoupled model simulations. Additionally, we will talk about the differences for the coupled model simulations compared to the uncoupled runs.