Articles | Volume 12, issue 9
Geosci. Model Dev., 12, 3991–4012, 2019
https://doi.org/10.5194/gmd-12-3991-2019
Geosci. Model Dev., 12, 3991–4012, 2019
https://doi.org/10.5194/gmd-12-3991-2019

Development and technical paper 10 Sep 2019

Development and technical paper | 10 Sep 2019

Scalability and some optimization of the Finite-volumE Sea ice–Ocean Model, Version 2.0 (FESOM2)

Nikolay V. Koldunov et al.

Data sets

FESOM2 scaling experiments N. Koldunov, V. Aizinger, N. Rakowsky, P. Scholz, D. Sidorenko, S. Danilov, and T. Jung https://doi.org/10.5281/zenodo.2428847

Model code and software

FESOM2 S. Danilov, D. Sidorenko, P. Scholz, Q. Wang, O. Gurses, N. Rakowsky, M. Smolentseva, N. Koldunov, J. Streffing, T. Rackow, V. Aizinger, D. Sein, and T. Jung https://doi.org/10.5281/zenodo.2428364

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Short summary
We measure how computational performance of the global FESOM2 ocean model (formulated on an unstructured mesh) changes with the increase in the number of computational cores. We find that for many components of the model the performance increases linearly but we also identify two bottlenecks: sea ice and ssh submodules. We show that FESOM2 is on par with the state-of-the-art ocean models in terms of throughput that reach 16 simulated years per day for eddy resolving configuration (1/10°).