Flux formulation (sbcflx.F90 module)

!-----------------------------------------------------------------------
&namsbc_flx    !   surface boundary condition : flux formulation
!-----------------------------------------------------------------------
!              !  file name  ! frequency (hours) ! variable  ! time interp. !  clim  ! 'yearly'/ ! weights  ! rotation ! land/sea mask !
!              !             !  (if <0  months)  !   name    !   (logical)  !  (T/F) ! 'monthly' ! filename ! pairing  ! filename      !
   sn_utau     = 'utau'      ,        24         , 'utau'    , .false.      , .false., 'yearly'  , ''       , ''       , ''
   sn_vtau     = 'vtau'      ,        24         , 'vtau'    , .false.      , .false., 'yearly'  , ''       , ''       , ''
   sn_qtot     = 'qtot'      ,        24         , 'qtot'    , .false.      , .false., 'yearly'  , ''       , ''       , ''
   sn_qsr      = 'qsr'       ,        24         , 'qsr'     , .false.      , .false., 'yearly'  , ''       , ''       , ''
   sn_emp      = 'emp'       ,        24         , 'emp'     , .false.      , .false., 'yearly'  , ''       , ''       , ''

   cn_dir      = './'      !  root directory for the location of the flux files
/

In the flux formulation (ln_flx=true), the surface boundary condition fields are directly read from input files. The user has to define in the namelist namsbc_flx the name of the file, the name of the variable read in the file, the time frequency at which it is given (in hours), and a logical setting whether a time interpolation to the model time step is required for this field. See §7.2.1 for a more detailed description of the parameters.

Note that in general, a flux formulation is used in associated with a restoring term to observed SST and/or SSS. See §7.12.3 for its specification.