Submitted as: model description paper 21 Oct 2020

Submitted as: model description paper | 21 Oct 2020

Review status: a revised version of this preprint is currently under review for the journal GMD.

ICONGETM v1.0 – Flexible two-way coupling via exchange grids between the unstructured-grid atmospheric model ICON and the structured-grid coastal ocean model GETM

Tobias Peter Bauer1,2, Knut Klingbeil2, Peter Holtermann2, Bernd Heinold1, Hagen Radtke2, and Oswald Knoth1 Tobias Peter Bauer et al.
  • 1Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig
  • 2Leibniz Institute for Baltic Sea Research Warnemünde (IOW), Seestraße 15, 18119 Rostock

Abstract. Coupled atmosphere-ocean models are developed for process understanding at the air-sea interface. Over the last 20 years, there have been studies involving simulations in the range of sub-annual simulations to climate scenarios. The development of coupled models highly depends on the kind and quality of the required data exchange between the model interfaces. This work achieved the development of a two-way coupled atmosphere-ocean model ICONGETM with flexible data exchange via exchange grids provided by the widely used ESMF regridding package. The regridding of flux data between the unstructured atmosphere model ICON and the structured regional ocean model GETM is conducted via these exchange grids. The newly developed model ICONGETM has been demonstrated for a coastal upwelling scenario in the Central Baltic Sea.

Tobias Peter Bauer et al.

Status: final response (author comments only)
Status: final response (author comments only)
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Tobias Peter Bauer et al.

Model code and software

ICONGETM: a regional coupled atmosphere-ocean model with flexible two-way coupling between unstructured and structured grids via exchange grids Tobias Peter Bauer, Knut Klingbeil, and Oswald Knoth

Tobias Peter Bauer et al.


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Short summary
ICONGETM is a coupled atmosphere-ocean model for high resolved area of interests using a flexible data exchange. The coupling routines handle automatically all processes so that the user only has to decide which data each model is receiving. It considers also the difference in the coast line due to different model grids. The first simulations over the Central Baltic Sea shows a significant improvement in the results of the atmosphere compared to uncoupled simulations, similar also for the ocean.