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!!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
!! NEMO/TOP :   Reference namelist 
!!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
!!               - tracer run information                (namtrc_run)
!!               - tracer definition                     (namtrc    )
!!               - tracer data initialisation            (namtrc_dta)
!!               - tracer advection                      (namtrc_adv)
!!               - tracer lateral diffusion              (namtrc_ldf)
!!               - tracer vertical physics               (namtrc_zdf)
!!               - tracer newtonian damping              (namtrc_dmp)
!!               - dynamical tracer trends               (namtrc_trd)
!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
!-----------------------------------------------------------------------
&namtrc_run      !   run information
!-----------------------------------------------------------------------
   ln_top_euler  = .false.,  !  use Euler time-stepping for TOP
   ln_rsttr      = .false.,  !  start from a restart file (T) or not (F)
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   nn_rsttr      =   0       !  restart control = 0 initial time step is not compared to the restart file value
                             !                  = 1 do not use the value in the restart file
                             !                  = 2 calendar parameters read in the restart file
   cn_trcrst_in  = "restart_trc"   !  suffix of pass. sn_tracer restart name (input)
   cn_trcrst_indir = "."           !  directory from which to read input passive tracer restarts
   cn_trcrst_out = "restart_trc"   !  suffix of pass. sn_tracer restart name (output)
   cn_trcrst_outdir = "."          !  directory to which to write output passive tracer restarts
/
!-----------------------------------------------------------------------
&namtrc          !   tracers definition
!-----------------------------------------------------------------------
   jp_bgc        =  0           !  Number of passive tracers of the BGC model
   !
   ln_pisces     =  .false.,    !  Run PISCES BGC model 
   ln_my_trc     =  .false.,    !  Run MY_TRC BGC model
   ln_age        =  .false.,    !  Run the sea water age tracer
   ln_cfc11      =  .false.,    !  Run the CFC11 passive tracer
   ln_cfc12      =  .false.,    !  Run the CFC12 passive tracer
   ln_sf6        =  .false.,    !  Run the SF6 passive tracer
   ln_c14        =  .false.,    !  Run the Radiocarbon passive tracer
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   !
   ln_trcdta     =  .false., !  Initialisation from data input file (T) or not (F)
   ln_trcdmp     =  .false., !  add a damping termn (T) or not (F)
   ln_trcdmp_clo =  .false., !  damping term (T) or not (F) on closed seas
   ln_trcbc      =  .false., !  Surface, Lateral or Open Boundaries conditions
   ln_trcais     =  .false., !  Antarctic Ice Sheet nutrient supply
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   !
   jp_dia3d      = 0         ! Number of 3D diagnostic variables
   jp_dia2d      = 0         ! Number of 2D diagnostic variables
   !_____________!___________!_________________________________________!____________!________________!
   !             !    name   !           title of the field            !   units    ! init from file ! 
!  sn_tracer(1)  = 'tracer  ', 'Tracer  Concentration                 ',   ' - '    ,   .false.
/
!-----------------------------------------------------------------------
&namage          !   AGE 
!-----------------------------------------------------------------------
   rn_age_depth      = 10            ! depth over which age tracer reset to zero
   rn_age_kill_rate  = -0.000138888  !  = -1/7200 recip of relaxation timescale (s) for  age tracer shallower than age_depth
/
!-----------------------------------------------------------------------
&namtrc_dta      !    Initialisation from data input file
!-----------------------------------------------------------------------
!                !  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_trcdta(1)  = 'data_TRC_nomask' ,        -12.       ,  'TRC'    ,    .false.   , .true. , 'yearly'  , ''       , ''       , ''
   !
   cn_dir        =  './'     !  root directory for the location of the data files
/
!-----------------------------------------------------------------------
&namtrc_adv      !   advection scheme for passive tracer                (default: NO selection)
!-----------------------------------------------------------------------
   ln_trcadv_OFF =  .false., !  No passive tracer advection
   ln_trcadv_cen =  .false., !  2nd order centered scheme
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      nn_cen_h   =  4               !  =2/4, horizontal 2nd order CEN / 4th order CEN
      nn_cen_v   =  4               !  =2/4, vertical   2nd order CEN / 4th order COMPACT
   ln_trcadv_fct =  .false., !  FCT scheme
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      nn_fct_h   =  2               !  =2/4, horizontal 2nd / 4th order 
      nn_fct_v   =  2               !  =2/4, vertical   2nd / COMPACT 4th order 
   ln_trcadv_mus =  .false., !  MUSCL scheme
      ln_mus_ups =  .false.,        !  use upstream scheme near river mouths
   ln_trcadv_ubs =  .false., !  UBS scheme
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      nn_ubs_v   =  2               !  =2  , vertical 2nd order FCT
   ln_trcadv_qck =  .false., !  QUICKEST scheme
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/
!-----------------------------------------------------------------------
&namtrc_ldf      !   lateral diffusion scheme for passive tracer        (default: NO selection)
!-----------------------------------------------------------------------
!                            !  Type of the operator:
   ln_trcldf_OFF   =  .false.,   !  No explicit diffusion
   ln_trcldf_tra   =  .false.,   !  use active tracer setting
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   !                         !  Coefficient (defined with namtra_ldf coefficient)
   rn_ldf_multi    = 1.          !  multiplier of aht for TRC mixing coefficient
   rn_fact_lap     = 1.          !  Equatorial enhanced zonal eddy diffusivity (lap only)
/
!-----------------------------------------------------------------------
&namtrc_rad      !  treatment of negative concentrations 
!-----------------------------------------------------------------------
   ln_trcrad     =  .true.,  !  artificially correct negative concentrations (T) or not (F)
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/
!-----------------------------------------------------------------------
&namtrc_snk      !  Sedimentation of particles
!-----------------------------------------------------------------------
   nitermax      =  2   !  number of iterations for sedimentation
/
!-----------------------------------------------------------------------
&namtrc_dcy      !  Diurnal cycle
!-----------------------------------------------------------------------
   ln_trcdc2dm   =  .false.,  !  Diurnal cycle for TOP
/
!-----------------------------------------------------------------------
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&namtrc_opt      !  light availability in the water column
!-----------------------------------------------------------------------
!                !  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_par        = 'par.orca'       ,     24            , 'fr_par'  ,  .true.      , .true. , 'yearly'  , ''       , ''       , ''
   cn_dir        = './'        ! root directory for the location of the dynamical files
   ln_varpar     =  .true.,    ! Read PAR from file
   parlux        =  0.43       ! Fraction of shortwave as PAR
   light_loc     = 'center'    ! Light location in the water cell ('center', 'integral')
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/
!-----------------------------------------------------------------------
&namtrc_dmp      !   passive tracer newtonian damping                   (ln_trcdmp=T)
!-----------------------------------------------------------------------
   nn_zdmp_tr    =    1      !  vertical   shape =0    damping throughout the water column
                             !                   =1 no damping in the mixing layer (kz  criteria)
                             !                   =2 no damping in the mixed  layer (rho crieria)
   cn_resto_tr   = 'resto_tr.nc'    !  create a damping.coeff NetCDF file (=1) or not (=0)
/
!-----------------------------------------------------------------------
&namtrc_ice      !    Representation of sea ice growth & melt effects
!-----------------------------------------------------------------------
   nn_ice_tr     =  -1       !  tracer concentration in sea ice 
                             !    =-1 (no vvl: identical cc in ice and ocean / vvl: cc_ice = 0)
                             !    = 0 (no vvl: cc_ice = zero / vvl: cc_ice = )
                             !    = 1 prescribed to a namelist value (implemented in pisces only)
/
!-----------------------------------------------------------------------
&namtrc_trd      !   diagnostics on tracer trends                       ('key_trdtrc')
!                          or mixed-layer trends                        ('key_trdmld_trc')
!----------------------------------------------------------------------
   nn_trd_trc    =  5475     !  time step frequency and tracers trends
   nn_ctls_trc   =   0       !  control surface type in mixed-layer trends (0,1 or n<jpk)
   rn_ucf_trc    =   1       !  unit conversion factor (=1 -> /seconds ; =86400. -> /day)
   ln_trdmld_trc_restart = .false.,!  restart for ML diagnostics
   ln_trdmld_trc_instant = .true., !  flag to diagnose trends of instantantaneous or mean ML T/S
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   ln_trdtrc( 1) = .true.
   ln_trdtrc( 2) = .true.
   ln_trdtrc(23) = .true.
/
!----------------------------------------------------------------------
&namtrc_bc       !   data for boundary conditions
!----------------------------------------------------------------------
! Surface and coastal input data must be specified individually for each tracer.
! Lateral open boundary inputs are specified for each BDY segment and related inputfiles
!  must contain data for the variables with active open boundary (set through &namtrc).
!  By default, variable names of BDY inputfiles are the same as in &namtrc, but using 
!  cn_tronam it is possible to specify alternative variable names to match with inputfiles.
!               !    file name             ! freq ! variable ! time interp. ! clim   !'yearly' ! weights  ! rotation | land/sea
!  sn_trcobc(1) = 'bdy_dta_trc_North_y1980',  -1  , 'dummy'  ,  .false.     , .true. ,'yearly' ,  '',  '',  ''
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!-----------------------------------------------------------------------
   cn_dir_sbc    =  './'     !  root directory for the location of SURFACE data files
   cn_dir_cbc    =  './'     !  root directory for the location of COASTAL data files
   cn_dir_obc    =  './'     !  root directory for the location of OPEN data files
   ln_rnf_ctl    = .false.,  !  Remove runoff dilution on tracers with absent river load
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   rn_sbc_time   =  86400.   !  Time scaling factor for SBC data (seconds in a day)
   rn_cbc_time   =  86400.   !  Time scaling factor for CBC data (seconds in a day)
!  cn_tronam(1)  = 'var1'    !  Tracer-name to variable-name translation
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/
!----------------------------------------------------------------------
&namtrc_bdy      !   Setup of tracer boundary conditions
!-----------------------------------------------------------------------
   cn_trc_dflt   = 'neumann' !  OBC applied by default to all tracers
   cn_trc        = 'none'    !  Boundary conditions used for tracers with data files (selected in namtrc)

   nn_trcdmp_bdy = 0         !  Use damping timescales defined in nambdy of namelist
                             !  = 0 NO damping of tracers at open boudaries
                             !  = 1 Only for tracers forced with external data
                             !  = 2 Damping applied to all tracers
   ln_zintobc    = .false.,  ! T if a vertical interpolation is required. Variables gdep[t] and e3[t] must exist in the file 
                             !  automatically defined to T if the number of vertical levels in bdy dta /= jpk
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/
!-----------------------------------------------------------------------
&namtrc_ais      !  Representation of Antarctic Ice Sheet tracers supply
!-----------------------------------------------------------------------
   nn_ais_tr     =  1        !  tracer concentration in iceberg and ice shelf
                             !    = 0 (null concentrations)
                             !    = 1 prescribed concentrations
   rn_icbdep     =  120.     ! Mean underwater depth of iceberg (m)
/