C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/dic/dic_init_fixed.F,v 1.12 2010/05/14 21:52:33 jahn Exp $
C $Name:  $

#include "DIC_OPTIONS.h"

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|
CBOP
C     !ROUTINE: DIC_INIT_FIXED

C     !INTERFACE:
      SUBROUTINE DIC_INIT_FIXED( myThid )

C     !DESCRIPTION:
C     Initialize fixed quantities

C     !USES:
      IMPLICIT NONE
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "DIC_VARS.h"
#include "DIC_ATMOS.h"

C     !INPUT PARAMETERS:
C     myThid       :: my Thread Id number
      INTEGER myThid
CEOP

#ifdef ALLOW_DIC
      INTEGER k
      CHARACTER*(MAX_LEN_MBUF) msgBuf
      INTEGER iUnit

C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----|

      _BEGIN_MASTER(myThid)

C set up coefficients for DIC chemistry
C define Schmidt no. coefficients for CO2
      sca1 = 2073.1 _d 0
      sca2 = -125.62 _d 0
      sca3 =    3.6276 _d 0
      sca4 =   -0.043219 _d 0
C define Schmidt no. coefficients for O2
C based on Keeling et al [GBC, 12, 141, (1998)]
      sox1 = 1638.0 _d 0
      sox2 = -81.83 _d 0
      sox3 =    1.483 _d 0
      sox4 =   -0.008004 _d 0

C coefficients for determining saturation O2
      oA0=  2.00907 _d 0
      oA1=  3.22014 _d 0
      oA2=  4.05010 _d 0
      oA3=  4.94457 _d 0
      oA4= -2.56847 _d -1
      oA5=  3.88767 _d 0
      oB0= -6.24523 _d -3
      oB1= -7.37614 _d -3
      oB2= -1.03410 _d -2
      oB3= -8.17083 _d -3
      oC0= -4.88682 _d -7

C     Set other constant/flag

#ifndef USE_ATMOSCO2

      IF ( dic_int1.EQ.2 ) THEN
        CALL MDSFINDUNIT( iUnit, mythid )
        OPEN(UNIT=iUnit,FILE='co2atmos.dat',STATUS='old')
        DO k=1,dic_int2
          READ(iUnit,*) co2atmos(k)
          WRITE(standardMessageUnit,*) 'co2atmos',co2atmos(k)
        ENDDO
        CLOSE(iUnit)
      ENDIF

#endif /* ndef USE_ATMOSCO2 */

#ifdef DIC_BIOTIC
#ifdef ALLOW_AUTODIFF
cph nlev=Nr used in TAF store directive
      nlev=Nr
#else
      k = 1
      DO WHILE ( k .LT. Nr .AND. rC(k) .GE. -zcrit )
        k = k+1
      ENDDO
      nlev = k
#endif
C--   Print out nlev values :
      iUnit = standardMessageUnit
      WRITE(msgBuf,'(A)') ' '
      CALL PRINT_MESSAGE(msgBuf,iUnit,SQUEEZE_RIGHT,myThid)
      WRITE(msgBuf,'(A)') '// ==================================='
      CALL PRINT_MESSAGE(msgBuf,iUnit,SQUEEZE_RIGHT,myThid)
      WRITE(msgBuf,'(A)') '//  DIC_INIT_FIXED parameters :'
      CALL PRINT_MESSAGE(msgBuf,iUnit,SQUEEZE_RIGHT,myThid)

       CALL WRITE_0D_I( nlev, INDEX_NONE, 'nlev =',
     &   ' /* Number of level over which Bio act is computed */')
#endif /* DIC_BIOTIC */

      _END_MASTER(myThid)

#ifdef ALLOW_MNC
      IF ( useMNC ) THEN
        CALL DIC_MNC_INIT( myThid )
      ENDIF
#endif /* ALLOW_MNC */

#ifdef ALLOW_DIAGNOSTICS
      IF ( useDIAGNOSTICS ) THEN
        CALL DIC_DIAGNOSTICS_INIT( myThid )
      ENDIF
#endif /* ALLOW_DIAGNOSTICS */

#endif /* ALLOW_DIC */

      RETURN
      END