Woods Hole Coastal and Marine Science Center

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Time Step

To achieve optimal efficiency for these multi-year runs, the time step was varied with season and forcing conditions as determined by trial and error. Although ECOM-si is not restricted by the gravity wave CFL condition, it is limited by the advective CFL condition. During the spring and summer months in particular, the time step needed to be decreased. During the winter, the time step was usually 414 s (108 steps per tidal cycle), except for a few short periods generally coinciding with winter storms. During the summer, the time step was usually 207 s (216 steps per tidal cycle).