&dynamics_visc
visc_gamma0  = 0.003 ! [m/s],   backgroung viscosity= gamma0*len, it should be as small a s possible (keep it < 0.01 m/s).
visc_gamma1  = 0.1   ! [nodim], for computation of the flow aware viscosity
visc_gamma2  = 0.285 ! [s/m],   is only used in easy backscatter option
visc_easybsreturn= 1

opt_visc     = 5          
! 5=Kinematic (easy) Backscatter
! 6=Biharmonic flow aware (viscosity depends on velocity Laplacian)
! 7=Biharmonic flow aware (viscosity depends on velocity differences)
! 8=Dynamic Backscatter

use_ivertvisc= .true.  
/

&dynamics_general
momadv_opt   = 2       ! option for momentum advection in moment only =2
use_freeslip = .false. ! Switch on free slip
use_wsplit   = .true. ! Switch for implicite/explicte splitting of vert. velocity
wsplit_maxcfl= 0.1     ! maximum allowed CFL criteria in vertical (0.5 < w_max_cfl < 1.) 
                       ! in older FESOM it used to be w_exp_max=1.e-3
/

