Special configurations

ICON can be run in some special model configurations. Configurations that are often used are the aquaplanet (APE) setup and the radiative-convective equilibrium (RCE) setup. The APE setup assumes that the bottom boundary consists of water only, with all land surface and orography being removed. The RCE setup additionally assumes that top-of-atmosphere insolation is spatially homogeneous and that the planet is nonrotating.

A description of the necessary changes to the source code and to the run script can be found here both for the RCE and APE setup, using icon-2.4.0 with the climate (“ECHAM”) physics.

Instead of running the global model, RCE simulations can also be run on a limited area with doubly-periodic boundary conditions, using the Torus geometry. A description of the necessary changes can be found here, again using icon-2.4.0 with the climate (“ECHAM”) physics.

The Torus geometry can also be used in RCE simulations with ICON-NWP or ICON-LEM. See next page (link below) for more details.

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