Ocean and sea ice#
Contact person
FESOM: Dmitry Sidorenko
ICON-O: Nils Brüggemann
Description#
ICON-O is the ocean-sea-ice component of ICON. It operates on a triangular grid with several grid refinement options and contains parameterizations and diagnostics for a wide range of applications. This makes ICON-O applicable for studying ocean dynamics ranging from internal waves and mixing via sub/-mesoscale eddies to large-scale current systems. ICON-O optionally contains the marine biogeochemistry model HAMOCC. The incorporation of ICON-O into the climate model ICON-ESM furthermore allows to study the impact of this variety of ocean processes in the coupled climate system. It is jointly developed by MPI-M, DKRZ, DWD and KIT.
FESOM (Finite-Element/volumE Sea ice-Ocean Model) FESOM exploits the concept of unstructured meshes featuring variable resolution. This enables the development of resolution distributions that are better tailored to specific scientific objectives, whether it entails enhancing resolution in dynamically active regions or conducting a detailed analysis of specific oceanic regions in a global context. As a result, FESOM enables global multi-resolution simulations without relying on traditional nesting techniques. Despite its unstructured model framework, FESOM2, utilizing the finite volume method, achieves a computational throughput on par with traditional ocean models operating on structured rectangular grids. FESOM incorporates the Finite-Element Sea Ice Model (FESIM). It exhibits excellent scalability characteristics, efficiently harnessing the power of massively parallel supercomputers, successfully running on pre-exascale HPC systems. FESOM finds application in the AWI Climate Model (AWI-CM), which contributed to CMIP6, and more recently coupled to the atmospheric model component of ECMWF (i.e., OpenIFS and IFS), and is part of EU Digital Twin for climate adaptation. The model has already successfully completed a sprint as part of the natESM project. Findings and solutions from the sprint can be found in the documentation.
Model(s)#
ICON:
ICON-O: ocean component of the ICON-ESM, open source license (BSD-3C).
FESOM:
Programming language(s)#
FORTRAN Jupyter Notebook C
Literature and Links#
ICON-O:
Internal software development and distribution - access restricted with login
Model performance of a strongly-eddying configuration: Korn, P. et al (2022). ICON-O: The Ocean Component of the ICON Earth System Model—Global Simulation Characteristics and Local Telescoping Capability
High resolution ICON-O configurations coupled to ICON-A: Hohenegger, C. et al (2023).ICON-Sapphire: simulating the components of the Earth system and their interactions at kilometer and subkilometer scales. GMD, 16, p.779-811
ICON Earth System Model Version 1.0: Jungclaus, J.H. et al (2022).The ICON Earth System Model Version 1.0, Journal of Advances in Modeling Earth Systems, Vol. 14, Issue 4
ICON-O Grid: [Korn, P. (2016). Formulation of an unstructured grid model for global ocean dynamics](https://www.sciencedirect.com/science/article/abs/pii/S002
ICON-Board with Wiki and Documentation 1999117301961?via%3Dihub)
New training dates on ICON: Website of DWD
FESOM:
FESOM documentary on ReadtheDocs
FESOM: Ocean model formulation Danilov, S., Sidorenko, D., Wang, Q., and Jung, T.: The Finite-volumE Sea ice–Ocean Model (FESOM2), Geosci. Model Dev., 10, 765–789, 2017
FESIM: Sea ice model formulation Danilov, S., Q. Wang, R. Timmermann, N. Iakovlev, D. Sidorenko, M. Kimmritz, T. Jung, and Schröter, J. (2015), Finite-Element Sea Ice Model (FESIM), version 2, Geosci. Model Dev., 8, 1747–1761