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jmc |
1.10 |
C $Header: /u/gcmpack/MITgcm/pkg/cfc/cfc12_forcing.F,v 1.9 2007/11/05 18:55:44 jmc Exp $ |
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jmc |
1.8 |
C $Name: $ |
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stephd |
1.1 |
C modified for external_forcing_DIC.F August 1999 |
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c |
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c modified swd Oct 01 and Feb 02, for use as package for c40_patch1 |
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c modified to use with c44 and ptracers: swd May 2002 |
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c modified to have carbonate and biological influences: swd June 2002 |
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c modified for cfc: swd Sep 2003 |
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C |
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#include "GCHEM_OPTIONS.h" |
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jmc |
1.8 |
#define OCMIP_GRAD |
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#undef STEPH_GRAD |
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stephd |
1.1 |
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CStartOfInterFace |
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jmc |
1.9 |
SUBROUTINE CFC12_FORCING( PTR_CFC12, GCFC12, |
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stephd |
1.1 |
& bi,bj,imin,imax,jmin,jmax, |
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& myIter,myTime,myThid) |
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C /==========================================================\ |
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C | SUBROUTINE CFC12_FORCING | |
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jmc |
1.9 |
C | o Calculate the changes to CFC12 through air-sea fluxes | |
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stephd |
1.1 |
C |==========================================================| |
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IMPLICIT NONE |
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C == GLobal variables == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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#include "CFC.h" |
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jmc |
1.5 |
#include "PTRACERS_SIZE.h" |
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jmc |
1.9 |
#include "PTRACERS_PARAMS.h" |
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stephd |
1.1 |
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C == Routine arguments == |
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INTEGER myIter |
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_RL myTime |
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INTEGER myThid |
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_RL PTR_CFC12(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL GCFC12(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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INTEGER bi, bj, imin, imax, jmin, jmax |
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#ifdef ALLOW_PTRACERS |
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#ifdef ALLOW_CFC |
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C == Local variables == |
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_RL SURCFC12(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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stephd |
1.2 |
_RL xintp(1-OLy:sNy+OLy) |
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stephd |
1.1 |
INTEGER I,J |
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ce107 |
1.6 |
_RL myYear |
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INTEGER lastYear, thisYear |
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stephd |
1.1 |
_RL dtinc, aWght, bWght |
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_RL ACFC12north, ACFC12south |
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ce107 |
1.6 |
INTEGER maxYear |
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jmc |
1.8 |
#ifdef STEPH_GRAD |
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stephd |
1.1 |
_RL a1, a2 |
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jmc |
1.8 |
#endif |
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stephd |
1.2 |
_RL yNorth, ySouth |
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stephd |
1.1 |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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SURCFC12(i,j)=0.d0 |
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ENDDO |
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ENDDO |
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jmc |
1.8 |
C find atmospheric CFC |
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jmc |
1.5 |
myYear=float(myIter-PTRACERS_Iter0)*deltaTclock |
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stephd |
1.1 |
& /(360.d0*24.d0*3600.d0) |
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lastYear=1+int(myYear+0.5) |
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thisYear=lastYear+1 |
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maxYear=cfc_yearend-cfc_yearbeg |
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if (thisYear.lt.maxYear) then |
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stephd |
1.3 |
dtinc=myYear-(lastYear-1.d0) |
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stephd |
1.1 |
aWght=0.5d0+dtinc |
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bWght=1.d0-aWght |
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c IF (bi*bj.eq.1) |
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stephd |
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c & write(0,*) 'myYear = ',myYear,lastYear,dtinc,aWght |
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stephd |
1.1 |
ACFC12north = ACFC12(lastYear,1)*bWght |
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& + ACFC12(thisYear,1)*aWght |
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ACFC12south = ACFC12(lastYear,2)*bWght |
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& + ACFC12(thisYear,2)*aWght |
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else |
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stephd |
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ACFC12north = ACFC12(maxYear,1) |
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stephd |
1.7 |
ACFC12south = ACFC12(maxYear,2) |
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stephd |
1.1 |
endif |
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stephd |
1.3 |
print*,'YEAR,ACFC12north,ACFC12south', myYear, |
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& ACFC12north,ACFC12south |
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jmc |
1.8 |
C provide gradient between N and S values |
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jmc |
1.10 |
C STEPH S INITIAL VERSION |
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stephd |
1.2 |
#ifdef STEPH_GRAD |
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stephd |
1.1 |
DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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if ((j.gt.int(sNy/2)+3.and.j.le.sNy).or.j.lt.1) then |
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ATMOSCFC12(i,j,bi,bj)=ACFC12north |
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endif |
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if (j.ge.int(sNy/2)-3.and.j.le.int(sNy/2)+3) then |
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a1=(float(j-int(sNy/2)+3)+.5)/7 |
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a2=1.d0-a1 |
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ATMOSCFC12(i,j,bi,bj)=a1*ACFC12south + |
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& a2*ACFC12north |
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endif |
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if ((j.lt.int(sNy/2)-3.and.j.gt.0).or.j.gt.sNy) then |
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ATMOSCFC12(i,j,bi,bj)=ACFC12south |
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endif |
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ENDDO |
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ENDDO |
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stephd |
1.2 |
#endif |
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jmc |
1.8 |
C OCMIP VERSION |
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stephd |
1.2 |
#ifdef OCMIP_GRAD |
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yNorth = 10.0 |
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ySouth = -10.0 |
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DO j=1-OLy,sNy+OLy |
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i=1 |
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IF(yC(i,j,bi,bj) .GE. yNorth) THEN |
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xintp(j) = 1.0 |
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ELSE IF(yC(i,j,bi,bj) .LE. ySouth) THEN |
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xintp(j) = 0.0 |
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ELSE |
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xintp(j) = (yC(i,j,bi,bj) - ySouth)/ |
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& (yNorth - ySouth) |
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ENDIF |
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DO i=1-OLx,sNx+OLx |
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ATMOSCFC12(i,j,bi,bj)= xintp(j) * ACFC12north |
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& + (1.0 - xintp(j))*ACFC12south |
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stephd |
1.1 |
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stephd |
1.2 |
ENDDO |
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c print*,'QQ cfc12', j, ATMOSCFC12(1,j,bi,bj) |
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ENDDO |
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#endif |
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jmc |
1.8 |
C cfc12 air-sea interaction |
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stephd |
1.1 |
CALL CFC12_SURFFORCING( PTR_CFC12, SURCFC12, |
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& bi,bj,imin,imax,jmin,jmax, |
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& myIter,myTime,myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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GCFC12(i,j,1)=GCFC12(i,j,1)+SURCFC12(i,j) |
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ENDDO |
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ENDDO |
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#endif |
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#endif |
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RETURN |
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END |
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