Output mean flow files

• Enable the FLAG_19 = -DTIDE_OUTPUT in the make.inc file in the FVCOM source directory.
• Ensure the FLAG_18 = -DMEAN_FLOW is commented out.
• Recompile FVCOM to account for the new configuration (may require a make clean followed by make).
• In the FVCOM name list, turn off all outputs:

    ...
    RST_ON           = F,
    ...
    NC_ON            = F,
    ...
    NCAV_ON          = F,

• Disable all bar the tidal forcing at the boundary:

    &NML_SURFACE_FORCING
    WIND_ON                       = F,
    ...
    HEATING_ON                    = F,
    ...
    PRECIPITATION_ON              = F,
    ...
    AIRPRESSURE_ON                = F,

• Turn off all temperature and salinity nudging and mean flow:

    &NML_OPEN_BOUNDARY_CONTROL
    ...
    OBC_TEMP_NUDGING           = F,
    ...
    OBC_SALT_NUDGING           = F,
    ...
    OBC_MEANFLOW               = F,

• Set temperature, salinity and velocity to constant:

    STARTUP_TYPE      = 'coldstart',
    ...
    STARTUP_UV_TYPE   = 'default',
    STARTUP_TURB_TYPE = 'default',
    STARTUP_TS_TYPE   = 'constant',
    STARTUP_T_VALS    = 10.5,
    STARTUP_S_VALS    = 35.0,
    STARTUP_U_VALS    = 0.0E+0,
    STARTUP_V_VALS    = 0.0E+0,

• In the &NML_OPEN_BOUNDARY_CONTROL section of the name list, edit the OBC_TIDEOUT_INITIAL and OBC_TIDEOUT_INTERVAL directives:

    &NML_OPEN_BOUNDARY_CONTROL
    ...
    OBC_TIDEOUT_INITIAL         = 1,
    OBC_TIDEOUT_INTERVAL        = 600,

This differs from the instructions in the manual which specify OBC_TIDEOUT_INITIAL is of the form YYYY-MM-DD hh:mm:ss, which doesn't work, and OBC_TIDEOUT_INTERVAL is of the form seconds = 720.0, which also doesn't work. Incidentally, the OBC_TIDEOUT_INTERVAL should be an integer value (i.e. 600, not 600.0).