ICON-ESM (Ruby) maintains several set-ups tailored to specific applications. They are designed to use innovative features specific to ICON. For example, ICON’s singularity-free grids avoid restrictions concerning continental configurations, allowing for undisturbed Aqua-Planet set-ups.

The configurations extend from very low-resolution (Ruby-SWITCH) for training purposes and multi-millennial simulations at an efficiency close to Intermediate Complexity Models, to the high end of climate models (Ruby-2) with eddy-resolving ocean and atmosphere resolution that formerly was merely applied in regional models. The chosen set-ups are designed to take full advantage of ICON’s flexibility, scaling performance, and further innovative features specific to ICON.