| Summary: | We discuss the development of a new coupled climate model at GEOMAR, capable of resolving the mesoscale. The ocean component is a ORCA05 NEMO configuration with regional refinements in e.g. the tropical Atlantic (INALT), Southern Ocean (ORION), or North Atlantic (VIKING) where the horizontal resolution is 10 km or finer. The atmosphere component is OpenIFS which can be run at T511 (39 km), T1023 (20 km) or T2047 (10 km) resolution. A climate model that resolves the mesoscale can capture oceanic eddies and tropical storms, and thus be used to understand how these phenomena respond to global warming. Latest results include experiments using NEMO ocean and ECHAM atmosphere, as well as atmosphere-only experiments with OpenIFS to understand the impact of horizontal resolution in the atmosphere. We report on the latest results and discuss the challenges and goals of future model development
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