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C $Header: /u/gcmpack/MITgcm/pkg/thsice/thsice_balance_frw.F,v 1.1 2012/08/01 18:22:41 jmc Exp $ |
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C $Name: $ |
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|
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#include "THSICE_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: THSICE_BALANCE_FRW |
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C !INTERFACE: |
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SUBROUTINE THSICE_BALANCE_FRW( |
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I iMin, iMax, jMin, jMax, |
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I prcAtm, myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE THSICE_BALANCE_FRW |
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C | o Correct ocean fresh-water forcing for global imbalance |
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C | of Atmos+Land fresh-water flux |
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C *==========================================================* |
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C \ev |
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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 "FFIELDS.h" |
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#include "THSICE_SIZE.h" |
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#include "THSICE_PARAMS.h" |
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#include "THSICE_VARS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C iMin,iMax :: computation domain: 1rst index range |
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C jMin,jMax :: computation domain: 2nd index range |
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C prcAtm :: precip (+RunOff) from Atmos+Land |
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C myTime :: Current time in simulation (s) |
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C myIter :: Current iteration number |
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C myThid :: My Thread Id. number |
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INTEGER iMin, iMax |
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INTEGER jMin, jMax |
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_RL prcAtm(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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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_BALANCE_FLUXES |
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C !LOCAL VARIABLES: |
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C bi,bj :: Tile indices |
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C i, j :: loop indices |
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INTEGER bi,bj |
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INTEGER i, j |
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_RL sumPrc, sumTilePrc(nSx,nSy) |
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_RL sumFrW, sumTileFrW(nSx,nSy) |
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_RL tmpFac, tmpVar |
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|
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C-- Calculate and global-mean precip (+RunOff) |
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C and global-mean imbalance of net Atmos Fresh-Water flux |
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IF ( thSIceBalanceAtmFW.NE.0 ) THEN |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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sumTilePrc(bi,bj) = 0. _d 0 |
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sumTileFrW(bi,bj) = 0. _d 0 |
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DO j = 1,sNy |
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DO i = 1,sNx |
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sumTilePrc(bi,bj) = sumTilePrc(bi,bj) |
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& + MAX( prcAtm(i,j,bi,bj), zeroRL ) |
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& *rA(i,j,bi,bj)*maskInC(i,j,bi,bj) |
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sumTileFrW(bi,bj) = sumTileFrW(bi,bj) |
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& + icFrwAtm(i,j,bi,bj) |
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& *rA(i,j,bi,bj)*maskInC(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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sumPrc = 0. _d 0 |
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IF ( thSIceBalanceAtmFW.EQ.2 ) |
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& CALL GLOBAL_SUM_TILE_RL( sumTilePrc, sumPrc, myThid ) |
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CALL GLOBAL_SUM_TILE_RL( sumTileFrW, sumFrW, myThid ) |
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|
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IF ( globalArea.GT.0. _d 0 ) THEN |
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sumPrc = sumPrc / globalArea |
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sumFrW = sumFrW / globalArea |
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ENDIF |
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|
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C- save amount of correction (for diagnostics) |
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_BEGIN_MASTER(myThid) |
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adjustFrW = -sumFrW |
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_END_MASTER(myThid) |
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|
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ENDIF |
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|
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IF ( thSIceBalanceAtmFW.EQ.1 ) THEN |
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C-- Apply uniform correction to Ocean FW Forcing (+ Atm-Flux, for diagnostics) |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j = jMin,jMax |
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DO i = iMin,iMax |
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icFrwAtm(i,j,bi,bj) = icFrwAtm(i,j,bi,bj) |
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& - sumFrW*maskInC(i,j,bi,bj) |
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EmPmR(i,j,bi,bj) = EmPmR(i,j,bi,bj) |
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& - sumFrW*maskInC(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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ELSEIF ( thSIceBalanceAtmFW.EQ.2 ) THEN |
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C-- Scale correction by local precip and apply it to Ocean FW Forcing |
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C (+ Atm-Flux, for diagnostics) |
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IF ( sumPrc.GT.0. _d 0 ) THEN |
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tmpFac = sumFrW / sumPrc |
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ELSE |
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tmpFac = 0. |
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_BEGIN_MASTER(myThid) |
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adjustFrW = 0. _d 0 |
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_END_MASTER(myThid) |
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ENDIF |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j = jMin,jMax |
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DO i = iMin,iMax |
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tmpVar = tmpFac*MAX( prcAtm(i,j,bi,bj), zeroRL ) |
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& *maskInC(i,j,bi,bj) |
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icFrwAtm(i,j,bi,bj) = icFrwAtm(i,j,bi,bj) - tmpVar |
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EmPmR(i,j,bi,bj) = EmPmR(i,j,bi,bj) - tmpVar |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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ELSEIF ( thSIceBalanceAtmFW.NE.0 ) THEN |
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STOP |
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& 'ABNORMAL END: THSICE_BALANCE_FRW: invalid thSIceBalanceAtmFW' |
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ENDIF |
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|
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#endif /* ALLOW_BALANCE_FLUXES */ |
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|
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RETURN |
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END |
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