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C $Header: /u/gcmpack/MITgcm/pkg/cfc/cfc12_forcing.F,v 1.11 2013/06/07 15:43:31 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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CBOP |
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C !ROUTINE: CFC12_FORCING |
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C !INTERFACE: |
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SUBROUTINE CFC12_FORCING( |
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I pTr_CFC12, |
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U gCFC12, |
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I bi, bj, iMin, iMax, jMin, jMax, |
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I myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE CFC12_FORCING |
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C | o Calculate the changes to CFC12 through air-sea fluxes |
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C *==========================================================* |
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|
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C !USES: |
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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 "CFC_ATMOS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C pTr_CFC12 :: ocean CFC12 concentration |
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C gCFC12 :: CFC12 tendency |
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C bi, bj :: current tile indices |
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C iMin,iMax :: computation domain, 1rst index bounds |
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C jMin,jMax :: computation domain, 2nd index bounds |
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C myTime :: current time in simulation |
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C myIter :: current iteration number |
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C myThid :: my Thread Id number |
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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 |
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INTEGER iMin, iMax, jMin, jMax |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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CEOP |
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|
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#ifdef ALLOW_PTRACERS |
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#ifdef ALLOW_CFC |
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C !FUNCTIONS: |
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LOGICAL DIFFERENT_MULTIPLE |
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EXTERNAL DIFFERENT_MULTIPLE |
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|
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C !LOCAL VARIABLES: |
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C AtmosCFC12 :: atmospheric CFC12 field |
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C fluxCFC12 :: air-sea CFC12 fluxes |
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C msgBuf :: message buffer |
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_RL fluxCFC12(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL AtmosCFC12(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER i, j |
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INTEGER intimeP, intime0, intime1, iRec0, iRec1 |
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_RL cfcTime, aWght, bWght |
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_RL ACFC12north, ACFC12south |
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_RL recip_dLat, weight |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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#ifdef STEPH_GRAD |
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_RL a1, a2 |
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#endif |
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|
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C-- Find atmospheric CFC : |
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C assume that cfcTime=0 corresponds to the beginning of the 1rst record |
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C time-period. This is consistent with 1rst record value = time-averaged |
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C atmos-CFC over time period: cfcTime= 0 to cfcTime= 1 x atmCFC_recSepTime |
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C--------------------------- |
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cfcTime = myTime + atmCFC_timeOffset |
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CALL GET_PERIODIC_INTERVAL( |
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O intimeP, intime0, intime1, bWght, aWght, |
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I zeroRL, atmCFC_recSepTime, |
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I deltaTclock, cfcTime, myThid ) |
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iRec0 = MAX( 1, MIN( ACFCnRec, intime0 ) ) |
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iRec1 = MAX( 1, MIN( ACFCnRec, intime1 ) ) |
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ACFC12north = ACFC12( iRec0, 1 )*bWght |
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& + ACFC12( iRec1, 1 )*aWght |
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ACFC12south = ACFC12( iRec0, 2 )*bWght |
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& + ACFC12( iRec1, 2 )*aWght |
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|
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C- Print to check: |
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IF ( DIFFERENT_MULTIPLE( CFC_monFreq, myTime, deltaTClock ) |
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& .AND. bi*bj.EQ.1 ) THEN |
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WRITE(msgBuf,'(A,6X,I10,I6,F9.4,F7.1)') |
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& 'CFC12_FORCING: iter,rec0,w0,yr0 =', myIter, |
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& intime0, bWght, ACFCyear(iRec0) |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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WRITE(msgBuf,'(A,1PE16.7,I6,0PF9.4,F7.1)') |
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& 'CFC12_FORCING: cfcT,rec1,w1,yr1 =', cfcTime, |
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& intime1, aWght, ACFCyear(iRec1) |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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WRITE(msgBuf,'(2(A,F14.6))') |
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& 'CFC12_FORCING: aCFC12_N =', ACFC12north, |
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& ' , aCFC12_S =', ACFC12south |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid ) |
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ENDIF |
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|
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C-- Provide gradient between N and S values |
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#ifdef STEPH_GRAD |
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C STEPH S INITIAL VERSION |
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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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AtmosCFC12(i,j)=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)=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)=ACFC12south |
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endif |
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ENDDO |
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ENDDO |
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#endif |
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#ifdef OCMIP_GRAD |
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C- OCMIP VERSION |
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C between N & S lat boundaries, do linear interpolation ; and |
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C beyond N or S lat boundaries, just take the hemispheric value |
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recip_dLat = 1. _d 0 / ( atmCFC_yNorthBnd - atmCFC_ySouthBnd ) |
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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) - atmCFC_ySouthBnd )*recip_dLat |
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weight = MAX( zeroRL, MIN( oneRL, weight ) ) |
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AtmosCFC12(i,j)= weight * ACFC12north |
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& + ( oneRL - weight )*ACFC12south |
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|
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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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C-- cfc12 air-sea fluxes |
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CALL CFC12_SURFFORCING( |
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I pTr_CFC12, AtmosCFC12, |
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O fluxCFC12, |
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I bi, bj, iMin, iMax, jMin, jMax, |
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I myTime, myIter, myThid ) |
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|
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C-- update surface tendencies |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gCFC12(i,j,1) = gCFC12(i,j,1) |
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c & + fluxCFC12(i,j)*recip_drF(1)*maskC(i,j,1,bi,bj) |
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& + fluxCFC12(i,j)*recip_drF(1)*recip_hFacC(i,j,1,bi,bj) |
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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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