FES2012 mesh has been built from the FES2004 mesh by increasing mostly ocean and shelf resolution, and more sparsely reworking shorelines description and resolution.
FES2012 mesh resolution
However, the mesh reworking was limited by available computer power and mesh resolution was not adequate in many places to accurately model ocean tides.This constraint was eased in FES2014 project, and a new bunch of regional improvements is underway.
- norwegian seas
- Baltic Sea (?)
- yellow Sea
Major ocean/shelf resolution reworking:
- Gulf of Mexico
- Indonesian Seas
FES2014-v86 mesh resolution
In addition, a new algorithm has been developed to control the maximum element size in a global ocean mesh.
FES2014-v86 + maxsize control mesh resolution
Discretisation is responsible for a wavelength error. It can be seen as a phase error, the following plots show the relative error of the tidal wavenumber. A 10.e-03 error in wavenumber relative error is responsible for a O(1 degree) error in phase after 1 wavelength.
Relative wavenumber error (left) and related phase error per wavelength (right), diurnal frequencies
Relative wavenumber error (left) and related phase error per wavelength (right), semi-diurnal frequencies
Relative wavenumber error (left) and related phase error per wavelength (right), quater-diurnal frequencies