FESOM2.1

Changes in development

• moved to GitHib for development.
• meshes under version control now (https://gitlab.awi.de/fesom)
• Simple tests (compile, run, compare results) for GitHub repository (on every commit). First implementations is in #4.
• Updated documentation (https://fesom2.readthedocs.io/en/latest/)

Major changes

• Parallel and asynchronous output writing (#14).
• Added Icepack sea ice thermodynamics (Zampieri et al., 2021) #70
• Added backscatter parameterisation (Juricke et al., 2019) #64
• Initial version of cavities #48, and its improvement #110
• New defaults in the namelists and a system to create setups from yaml files (#55). Most prominent changes are: Partial cells, zstar and unrotated mesh are now default options, JRA55-do is default forcing.
• New license (LGPL), as requested by some partners, so FESOM2 can be used as a library by comertial software #74
• Add an option to smooth tracer (smooth_bh_tra), which is nessesary for very high resolution setups #81
• Fix partial cells to work more stable in high resolution setups #27

Minor changes

• Print compile time git SHA at runtime (#13) to undetify version the model was compiled with.
• More information in netCDF output (#18 #31 #33). Provide some info on model version and setup.
• Fix bug with partitioner, that sometimes lead to wrong size of triangles #20
• Add several extra parameters to the sea ice namelist (#34)
• Introduce MAX_PATH length, to remove limit on the paths #65
• Ice deformation tensor is stored as an array (on elements) and can bу written out (4cfe296)
• Remove old METIS4 (66b0b74)
• Add cray ftn compiler support (#89)
• Fix coupled (to OpenIFS) thermodynamics where water instead of snow density was used for heat capacity (#93)
• Fix PPM bug #117
• Add density / buoyancy flux as output variable #116

References

Juricke, S., Danilov, S., Kutsenko, A., & Oliver, M. (2019). Ocean kinetic energy backscatter parametrizations on unstructured grids: Impact on mesoscale turbulence in a channel. Ocean Modelling, 138, 51–67. https://doi.org/10.1016/j.ocemod.2019.03.009

Zampieri, Lorenzo, Frank Kauker, Jörg Fröhle, Hiroshi Sumata, Elizabeth C. Hunke, and Helge Goessling. Impact of Sea-Ice Model Complexity on the Performance of an Unstructured-Mesh Sea-ice/ocean Model Under Different Atmospheric Forcings. Washington: American Geophysical Union, 2020. https://dx.doi.org/10.1002/essoar.10505308.1.