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C $Header: /u/gcmpack/MITgcm/pkg/cfc/cfc11_forcing.F,v 1.10 2010/03/16 00:14:47 jmc Exp $ |
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C $Name: $ |
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|
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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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|
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#include "GCHEM_OPTIONS.h" |
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#define OCMIP_GRAD |
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#undef STEPH_GRAD |
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|
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CStartOfInterFace |
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SUBROUTINE CFC11_FORCING( |
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I pTr_CFC11, |
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U gCFC11, |
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I bi, bj, imin, imax, jmin, jmax, |
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I myIter, myTime, myThid ) |
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|
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C *==========================================================* |
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C | SUBROUTINE CFC11_FORCING |
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C | o Calculate the changes to CFC11 through air-sea fluxes |
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C *==========================================================* |
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IMPLICIT NONE |
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|
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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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#include "PTRACERS_SIZE.h" |
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#include "PTRACERS_PARAMS.h" |
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|
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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_CFC11(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL gCFC11(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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INTEGER bi, bj, imin, imax, jmin, jmax |
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|
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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 gSurfCFC11(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER i,j |
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_RL myYear |
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INTEGER lastYear, thisYear |
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_RL dtinc, aWght, bWght |
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_RL ACFC11north, ACFC11south |
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INTEGER maxYear |
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#ifdef STEPH_GRAD |
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_RL a1, a2 |
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#endif |
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_RL yNorth, ySouth |
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_RL recip_dLat, weight |
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|
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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gSurfCFC11(i,j) = 0. _d 0 |
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ENDDO |
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ENDDO |
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|
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C find atmospheric CFC |
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myYear=float(myIter-PTRACERS_Iter0)*deltaTclock |
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& /(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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dtinc=myYear-(lastYear-1.d0) |
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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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c & write(0,*) 'myYear = ',myYear,lastYear,dtinc,aWght |
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ACFC11north = ACFC11(lastYear,1)*bWght |
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& + ACFC11(thisYear,1)*aWght |
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ACFC11south = ACFC11(lastYear,2)*bWght |
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& + ACFC11(thisYear,2)*aWght |
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else |
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ACFC11north = ACFC11(maxYear,1) |
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ACFC11south = ACFC11(maxYear,2) |
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endif |
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c print*,'YEAR,ACFC11north,ACFC11south', myYear, |
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c & ACFC11north,ACFC11south |
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C provide gradient between N and S values |
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|
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C STEPH S INITIAL VERSION |
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#ifdef STEPH_GRAD |
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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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ATMOSCFC11(i,j,bi,bj)=ACFC11north |
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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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ATMOSCFC11(i,j,bi,bj)=a1*ACFC11south + |
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& a2*ACFC11north |
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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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ATMOSCFC11(i,j,bi,bj)=ACFC11south |
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endif |
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ENDDO |
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ENDDO |
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#endif |
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C OCMIP VERSION |
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#ifdef OCMIP_GRAD |
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yNorth = 10.0 |
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ySouth = -10.0 |
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recip_dLat = 1. _d 0 / ( yNorth - ySouth ) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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weight = ( yC(i,j,bi,bj) - ySouth )*recip_dLat |
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weight = MAX( zeroRL, MIN( oneRL, weight ) ) |
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ATMOSCFC11(i,j,bi,bj)= weight * ACFC11north |
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& + ( oneRL - weight )*ACFC11south |
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|
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ENDDO |
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c print*,'QQ cfc11', j, ATMOSCFC11(1,j,bi,bj) |
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ENDDO |
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#endif |
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C cfc11 air-sea interaction |
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CALL CFC11_SURFFORCING( pTr_CFC11, gSurfCFC11, |
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& bi,bj,imin,imax,jmin,jmax, |
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& myIter,myTime,myThid) |
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|
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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gCFC11(i,j,1) = gCFC11(i,j,1) + gSurfCFC11(i,j) |
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ENDDO |
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ENDDO |
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|
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#endif /* ALLOW_CFC */ |
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#endif /* ALLOW_PTRACERS */ |
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|
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RETURN |
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END |
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