| Home > Research > Ifsdocs > WAVES > |
Chapter 2. The kinematic part of the energy balance equation
Chapter 3. Parametrization of source terms and the energy balance in a growing wind sea
Chapter 4. An optimal interpolation scheme for assimilating altimeter data into the WAM model
Chapter 5 Numerical scheme
Chapter 6 The WAM-model software
Chapter 7 Wind-wave interaction at ECMWF
REFERENCES
Previous Section
6.3 Pre-processing programs
Two pre-processing programs are provided:
| 1) PREPROC, |
| 2) PRESET. |
The program PREPROC generates all time-independent information for the wave model. Starting from a regional or global topographic data set the model grid is created in the form required for the model. The standard model grid is a latitude-longitude grid, which may be regular or irregular, but Cartesian grids can also be chosen. Frequency, angular and group velocity arrays are generated. If the current refraction option is activated, PREPROC expects a current data set and interpolates the data onto the model grid. A number of model constants and matrices, such as the surface stress as a function of wind speed and wave-induced stress, are pre-computed and stored together with the model grid, frequency and angular information and the currents in two output files. If nested grids are generated, the information for the output, input and interpolation of boundary spectra are presented and stored in separate files for the coarse and fine mesh models.
PRESET generates an initial wave field for a wave model cold start in the event that no appropriate initial conditions are available. Controlled by the user input of PRESET, either the same initial JONSWAP spectrum is used at all ocean grid points, or the initial spectra are computed from the local initial winds, according to fetch laws with a
directional distribution.Next Section
Previous Section
 |
23.04.2002 |
 |
© ECMWF |
