MODULE trcnam_age
   !!======================================================================
   !!                         ***  MODULE trcnam_age  ***
   !! TOP :   initialisation of some run parameters for Age tracer
   !!======================================================================
   !! History :   2.0  !  2007-12  (C. Ethe, G. Madec) 
   !!----------------------------------------------------------------------
   !! trc_nam_age      : AGE  tracer initialisation
   !!----------------------------------------------------------------------
   USE oce_trc         ! Ocean variables
   USE trc             ! Ocean variables
   USE trcsms_age      ! AGE specific variable

   IMPLICIT NONE
   PRIVATE

   PUBLIC   trc_nam_age   ! called by trcnam.F90 module

   !!----------------------------------------------------------------------
   !! NEMO/TOP 3.3 , NEMO Consortium (2010)
   !! $Id$
   !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
   !!----------------------------------------------------------------------

CONTAINS

   SUBROUTINE trc_nam_age
      !!-------------------------------------------------------------------
      !!                  ***  ROUTINE trc_nam_age  ***
      !!                 
      !! ** Purpose :   Definition some run parameter for AGE model
      !!
      !! ** input   :   Namelist namage
      !!----------------------------------------------------------------------
      INTEGER :: ios                 ! Local integer output status for namelist read
      !!
      NAMELIST/namage/ rn_age_depth, rn_age_kill_rate 
      !!----------------------------------------------------------------------
      ! Variable setting
      ctrcnm    (jp_age) = 'Age'
      ctrcln    (jp_age) = 'Sea water age since surface contact'
      ctrcun    (jp_age) = 'year'
      ln_trc_ini(jp_age) = .false.
      ln_trc_sbc(jp_age) = .false.
      ln_trc_cbc(jp_age) = .false.
      ln_trc_obc(jp_age) = .false.
      !
      REWIND( numnat_ref )              ! Namelist namagedate in reference namelist : AGE parameters
      READ  ( numnat_ref, namage, IOSTAT = ios, ERR = 901)
901   IF( ios /= 0 ) CALL ctl_nam ( ios , 'namage in reference namelist', lwp )

      REWIND( numnat_cfg )              ! Namelist namagedate in configuration namelist : AGE parameters
      READ  ( numnat_cfg, namage, IOSTAT = ios, ERR = 902 )
902   IF( ios /= 0 ) CALL ctl_nam ( ios , 'namage in configuration namelist', lwp )
      IF(lwm) WRITE ( numont, namage )

      IF(lwp) THEN                  ! control print
         WRITE(numout,*) ' '
         WRITE(numout,*) ' Sea Age Tracer'
         WRITE(numout,*)
         WRITE(numout,*) ' trc_nam_age: Read namage, namelist for Age passive tracer'
         WRITE(numout,*) ' ~~~~~~~'
         WRITE(numout,*) '  depth over which age tracer reset to zero                              rn_age_depth      = ', &
              &          rn_age_depth 
         WRITE(numout,*) '  recip of relax. timescale (s) for age tracer shallower than age_depth  rn_age_kill_rate  = ', &
              &          rn_age_kill_rate 
         WRITE(numout,*) ''
      ENDIF

      !
   END SUBROUTINE trc_nam_age
   
   !!======================================================================
END MODULE trcnam_age