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gchem_calc_tendency.F
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C $Header: /u/gcmpack/MITgcm/pkg/gchem/gchem_calc_tendency.F,v 1.5 2013/06/10 02:52:57 jmc Exp $
C $Name: $
#include "GCHEM_OPTIONS.h"
CBOP
C !ROUTINE: GCHEM_CALC_TENDENCY
C !INTERFACE: ==========================================================
SUBROUTINE GCHEM_CALC_TENDENCY(
I myTime, myIter, myThid )
C !DESCRIPTION:
C In the case of GCHEM_SEPARATE_FORCING not defined,
C this subroutine computes the tracer tendencies due to a
C bio-geogchemistry or ecosystem model and stores them on an array
C gchemTendency, that will be incorporated into regular timestepping in
C in ptracers_intergrate.F
C The current example uses the CFC package, but his is meant to
C be replaced by anything that the user provides.
C !USES: ===============================================================
IMPLICIT NONE
#include "SIZE.h"
#include "GRID.h"
#include "DYNVARS.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "PTRACERS_SIZE.h"
#include "PTRACERS_PARAMS.h"
#include "PTRACERS_FIELDS.h"
#include "GCHEM.h"
#include "GCHEM_FIELDS.h"
C !INPUT PARAMETERS: ===================================================
C myTime :: current time
C myIter :: current timestep
C myThid :: thread number
_RL myTime
INTEGER myIter, myThid
CEOP
#ifdef ALLOW_GCHEM
# ifndef GCHEM_SEPARATE_FORCING
C !LOCAL VARIABLES: ====================================================
C i,j :: loop indices
C iTracer :: ptracer number
C bi,bj :: tile indices
C k :: vertical level
INTEGER i,j
INTEGER iTracer
INTEGER bi,bj,iMin,iMax,jMin,jMax,k
C gchemTendency is re-initialized here
DO iTracer = 1, PTRACERS_numInUse
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
DO k = 1, Nr
DO j = 1-OLy, sNy+OLy
DO i = 1-OLx, sNx+OLx
gchemTendency(i,j,k,bi,bj,iTracer) = 0. _d 0
ENDDO
ENDDO
ENDDO
ENDDO
ENDDO
ENDDO
C
C Here is the place for code to compute bio-geochemical
C tendency terms (sometimes referred to as source-minus-sink
C terms). The tendencies are stored on gchemTendency, as show
C in the CFC-example.
C
C loop over tiles
DO bj=myByLo(myThid),myByHi(myThid)
DO bi=myBxLo(myThid),myBxHi(myThid)
C define horizontal loop ranges
iMin = 1
iMax = sNx
jMin = 1
jMax = sNy
c DO iTracer = 1, PTRACER_numInUse
c DO k = 1, Nr
c DO j = 1-OLy, sNy+OLy
c DO i = 1-OLx, sNx+OLx
c gchemTendency(i,j,k,bi,bj,iTracer) = your specific model
c ENDDO
c ENDDO
c ENDDO
c ENDDO
C------------------------
C chemical forcing |
C------------------------
#ifdef ALLOW_CFC
IF ( useCFC ) THEN
CALL CFC11_FORCING(
I pTracer (1-OLx,1-OLy,1,bi,bj,1),
U gchemTendency(1-OLx,1-OLy,1,bi,bj,1),
I bi, bj, iMin, iMax, jMin, jMax,
I myTime, myIter, myThid )
CALL CFC12_FORCING(
I pTracer (1-OLx,1-OLy,1,bi,bj,2),
U gchemTendency(1-OLx,1-OLy,1,bi,bj,2),
I bi, bj, iMin, iMax, jMin, jMax,
I myTime, myIter, myThid )
ENDIF
#endif /* ALLOW_CFC */
C end of tile-loops
ENDDO
ENDDO
# endif /* GCHEM_SEPARATE_FORCING */
#endif /* ALLOW_GCHEM */
RETURN
END
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