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ICON-O: The Ocean Component of the ICON Earth System Model - Global simulation characteristics and local telescoping capability

MPS-Authors
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Korn,  Peter
Applied Mathematics and Computational Physics (AMCP), The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Brüggemann,  Nils
Institut für Meereskunde, Universität Hamburg;
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Jungclaus,  Johann H.       
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Lorenz,  Stephan
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Gutjahr,  Oliver
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
Institut für Meereskunde, Universität Hamburg;

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Haak,  Helmut
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Linardakis,  Leonidas
Computational Infrastructure and Model Development (CIMD), Scientific Computing Lab (ScLab), MPI for Meteorology, Max Planck Society;

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Mehlmann,  Carolin
Computational Infrastructure and Model Development (CIMD), Scientific Computing Lab (ScLab), MPI for Meteorology, Max Planck Society;

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Mikolajewicz,  Uwe
Ocean Physics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Notz,  Dirk       
Institut für Meereskunde, Universität Hamburg;
Max Planck Research Group The Sea Ice in the Earth System, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Putrasahan,  Dian       
Ocean Statistics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

Singh,  V.
MPI for Meteorology, Max Planck Society;

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von Storch,  Jin-Song       
Ocean Statistics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

Zhu ,  X.
Institut für Meereskunde, Universität Hamburg;
MPI for Meteorology, Max Planck Society;

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Marotzke,  Jochem       
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Citation

Korn, P., Brüggemann, N., Jungclaus, J. H., Lorenz, S., Gutjahr, O., Haak, H., et al. (2022). ICON-O: The Ocean Component of the ICON Earth System Model - Global simulation characteristics and local telescoping capability. Journal of Advances in Modeling Earth Systems, 14: e2021MS002952. doi:10.1029/2021MS002952.


Cite as: https://hdl.handle.net/21.11116/0000-000B-0C20-4
Abstract
Abstract We describe the ocean general circulation model ICON-O of the Max Planck Institute for Meteorology, which forms the ocean-sea ice component of the Earth system model ICON-ESM. ICON-O relies on innovative structure-preserving finite volume numerics. We demonstrate the fundamental ability of ICON-O to simulate key features of global ocean dynamics at both uniform and non-uniform resolution. Two experiments are analyzed and compared with observations, one with a nearly uniform and eddy-rich resolution of ?10?km and another with a telescoping configuration whose resolution varies smoothly from globally ?80?km to ?10?km in a focal region in the North Atlantic. Our results show first, that ICON-O on the nearly uniform grid simulates an ocean circulation that compares well with observations and second, that ICON-O in its telescope configuration is capable of reproducing the dynamics in the focal region over decadal time scales at a fraction of the computational cost of the uniform-grid simulation. The telescopic technique offers an alternative to the established regionalization approaches. It can be used either to resolve local circulation more accurately or to represent local scales that cannot be simulated globally while remaining within a global modeling framework.