L. Default__Parameter__Values__________________



      The  default  parameter  values  can  be  found  in  the  Fortran  block  data  files  blkdata.F
and kmixbdta.F. Within the job shell script a file model.data is created which contains a
subset of the model parameters and these values override the default values in the block
data  files.  Here  we  list  some  of  the  most  important  model  parameters  and  their  default
values for the 2x2 and 3x3 configurations.  Many of these can be changed at run time by
specifying their values in the namelists which are defined in the file nldefs.h.



Stand-alone 2x2 model configuration (accelerated run)



      Horizontal viscosity                                                    am = 8.0 e+8
      Background vertical viscosity                                           fkpm = 10.0
      Horizontal diffusivity                                                  ah = 0.0
      Background vertical diffusivity                                         fkph = 0.3
      Bottom friction                                                         cdbot = 0.001
      Eddy-induced advection coefficient                                      athkdf = 0.6 e+7
      Isopycnal diffusivity                                                   ahisop = 0.6 e+7
      Inverse maximum slope                                                   slmxr = 100.0
      KPP critical bulk Richardson number                                     Ricr = 0.3
      KPP critical local Richardson number                                    Riinfty = 0.7
      KPP shear vertical viscosity                                            vvcric = 50.0
      KPP shear vertical diffusivity                                          vdcric = 50.0
      KPP convective vertical viscosity                                       vvclim = 1000.0
      KPP convective vertical diffusivity                                     vdclim = 1000.0
      Strong heat restoring under ice                                         restQp = 386.0
      Strong salt restoring under ice                                         restFp = 2.77
      Weak ocean heat restoring                                               restQm = 0.0
      Weak ocean salt restoring                                               restFm = 0.092
      Number of layers which can form ice                                     kmxice = 1
      Tracer timestep                                                         dtts = 24000.0
      Baroclinic velocity timestep                                            dtuv = 2400.0
      Barotropic velocity timestep                                            dtsf = 2400.0
      Tracer vertical acceleration                                            dtxcel = 25*1.0, 4*5.0, 2*6.0,
                                                                                  2*7.0, 2*8.0, 2*9.0, 8*10.0
      Maximum number of scans                                                 mxscan = 1000
      Barotropic convergence criterion                                        crit = 2.0 e+7
      Fraction of implicit Coriolis force                                     acor = 0.0



                                                                L-1

Coupled 2x2 model configuration (synchronous run)



      The only changes from the 2x2 stand-alone parameter values are


                     Tracer timestep                                               dtts = 2400.0
                     Tracer vertical acceleration                                  dtxcel = 45*1.0



and the four surface forcing restoring parameter values are irrelevant.



Stand-alone 3x3 model configuration (accelerated run)



      Horizontal viscosity                                                    am = 3.0 e+9
      Background vertical viscosity                                           fkpm = 16.7
      Horizontal diffusivity                                                  ah = 0.0
      Background vertical diffusivity                                         fkph = 0.5
      Bottom friction                                                         cdbot = 0.001
      Eddy-induced advection coefficient                                      athkdf = 0.8 e+7
      Isopycnal diffusivity                                                   ahisop = 0.8 e+7
      Inverse maximum slope                                                   slmxr = 100.0
      KPP critical bulk Richardson number                                     Ricr = 0.3
      KPP critical local Richardson number                                    Riinfty = 0.7
      KPP shear vertical viscosity                                            vvcric = 50.0
      KPP shear vertical diffusivity                                          vdcric = 50.0
      KPP convective vertical viscosity                                       vvclim = 1000.0
      KPP convective vertical diffusivity                                     vdclim = 1000.0
      Strong heat restoring under ice                                         restQp = 386.0
      Strong salt restoring under ice                                         restFp = 2.77
      Weak ocean heat restoring                                               restQm = 0.0
      Weak ocean salt restoring                                               restFm = 0.023
      Number of layers which can form ice                                     kmxice = 1
      Tracer timestep                                                         dtts = 35040.0
      Baroclinic velocity timestep                                            dtuv = 3504.0
      Barotropic velocity timestep                                            dtsf = 3504.0
      Tracer vertical acceleration                                            dtxcel = 14*1.0, 5*5.0, 6*10.0
      Maximum number of scans                                                 mxscan = 1000
      Barotropic convergence criterion                                        crit = 1.0 e+6
      Fraction of implicit Coriolis force                                     acor = 0.0



                                                                L-2