namdyn_spg

!-----------------------------------------------------------------------
&namdyn_spg    !   surface pressure gradient                            (default: NO selection)
!-----------------------------------------------------------------------
   ln_dynspg_exp  = .false.   ! explicit free surface
   ln_dynspg_ts   = .false.   ! split-explicit free surface
      ln_bt_fw      = .true.     ! Forward integration of barotropic Eqs.
      ln_bt_av      = .true.     ! Time filtering of barotropic variables
         nn_bt_flt     = 1          ! Time filter choice  = 0 None
         !                          !                     = 1 Boxcar over   nn_e sub-steps
         !                          !                     = 2 Boxcar over 2*nn_e  "    "
      ln_bt_auto    = .true.     ! Number of sub-step defined from:
         rn_bt_cmax   =  0.8        ! =T : the Maximum Courant Number allowed
         nn_e         = 30          ! =F : the number of sub-step in rn_Dt seconds
      rn_bt_alpha   = 0.         ! Temporal diffusion parameter (if ln_bt_av=F)
/