WaveWatch III is a third generation wave model developed at NOAA/NCEP in the spirit of the WAM model (WAMDIG 1988, Komen et al. 1994). It is a further development of the model WW I, as developed at Delft University of Technology (Tolman 1989, 1991) and WW II, developed at NASA, Goddard Space Flight Center (e.g., Tolman 1992). WW III however, differs from its predecessors in many important points such as the governing equations, the model structure, the numerical methods and the physical parameterisations. The model solves the spectral action density balance equation for wavenumber-direction spectra. The models are forced by the wind fields from ECMWF ERA5 data set.
Aktis uses the latest developments published in the literature in parallel with its own testing programme to have the most suitable numerical and physical settings in the model suite. The figure below shows the extent of all the models.