FESOM implements the idea of using unstructured meshes with variable resolution. This mesh flexibility allows to increase resolution in dynamically active regions, while keep a relatively coarse-resolution setup elsewhere. FESOM allows global multi-resolution simulations without traditional nesting.

The dynamical core of the original version of FESOM employs the finite element method; its successor, FESOM2, uses the finite volume method, which increases the computational efficiency by a factor of 3-5. Both versions include the Finite-Element Sea Ice Model (FESIM).

Excellent scalability characteristics allow to make effective use of massively parallel supercomputers. 

FESOM is also used in the AWI Climate Model (AWI-CM), which contributes to CMIP6.


New publication in science magazine "Spektrum".

German Science magazine "Spektrum der Wissenschaft - Magazin für Naturwissenschaft": Published an article, featuring several FESOM based visualizations.

Wie ein Klimamodell entsteht : www.spektrum.de/magazin/wie-ein-klimamodell-entsteht/1773717

Major wind-driven ocean currents are shifting toward the poles

New geoengineering study published with AWI-CM

The new study, that use AWI-CM climate model,  "Sea ice targeted geoengineering can delay Arctic sea ice decline but not global warming" has been published in the AGU Journal "Earth’s Future“.

Media coverage:

Can Arctic ‘ice management’ combat climate change? (AWI press release)

Geoengineering: Pumpen gegen den Eisverlust? (Focus)

More articles from the media can be found here.

Paper on FESOM2 scalability and optimisation

The new paper "Scalability and some optimization of the Finite-volumE Sea ice–Ocean Model, Version 2.0 (FESOM2)" was recently published in GMD. The authors show that "... in terms of throughput, FESOM2 is on a par with state-of-the-art structured ocean models and, in a realistic eddy-resolving configuration (1/10° resolution), can achieve about 16 years per day on 14 000 cores. This suggests that unstructured-mesh models are becoming very competitive tools in high-resolution climate modeling."

First CMIP6 data from AWI-CM on ESGF

First data for CMIP6 project generated by AWI-CM start to appear on ESGF nodes. For now DECK and scenarioMIP are available. 

Fast EVP Solutions in a High‐Resolution Sea Ice Model

FESOM2 high resolution setup was used to demonstrate that EVP sea ice dynamics can be made faster without degrading the quality of the solution.