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C $Header: /u/gcmpack/MITgcm/pkg/dic/fe_chem.F,v 1.16 2010/04/13 03:06:14 jmc Exp $ |
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C $Name: $ |
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|
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#include "DIC_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: Fe_CHEM |
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C !INTERFACE: |
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SUBROUTINE Fe_CHEM( |
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I bi,bj, iMin,iMax,jMin,jMax, |
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I fe, |
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O freefe, |
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I myIter, myThid ) |
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|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE Fe_CHEM |
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C | o Calculate L,FeL,Fe concentration |
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C *==========================================================* |
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C \ev |
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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 "DIC_VARS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C bi, bj :: current tile indices |
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C iMin,iMax,jMin,jMax :: Range of points for which calculation is performed. |
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C myThid :: my Thread Id number |
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INTEGER bi,bj |
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INTEGER iMin,iMax,jMin,jMax |
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_RL fe(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL freefe(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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INTEGER myIter, myThid |
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CEOP |
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|
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#ifdef ALLOW_FE |
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C !LOCAL VARIABLES: |
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INTEGER i,j,k |
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_RL lig, FeL |
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_RL tmpfe |
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#ifdef AD_SAFE |
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_RL thx, thy, theps |
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#endif |
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|
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CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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C |
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C ADAPTED FROM PAYAL |
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C |
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CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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|
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DO k=1,Nr |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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freefe(i,j,k) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C ligand balance in surface layer |
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C in surface layer |
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|
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DO k=1,Nr |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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IF ( maskC(i,j,k,bi,bj).GT.0. ) THEN |
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|
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#ifdef DIC_NO_NEG |
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tmpfe =MAX( 0. _d 0 , fe(i,j,k) ) |
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#else |
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tmpfe = fe(i,j,k) |
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#endif |
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|
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C Ligand,FeL,Fe calculation |
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lig=(-ligand_stab*tmpfe + |
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& ligand_stab*ligand_tot-1. _d 0 |
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& +((ligand_stab*tmpfe |
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& -ligand_stab*ligand_tot+1. _d 0)**2 |
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& +4. _d 0*ligand_stab*ligand_tot)**0.5 _d 0 |
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& )/(2. _d 0*ligand_stab) |
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|
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FeL = ligand_tot-lig |
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IF (tmpfe.NE.0. _d 0) THEN |
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freefe(i,j,k) = tmpfe -FeL |
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ELSE |
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freefe(i,j,k) = 0. _d 0 |
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ENDIF |
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#ifdef MINFE |
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#ifdef AD_SAFE |
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thx=freefe(i,j,k) |
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thy=freefemax |
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theps=1. _d -8 |
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freefe(i,j,k) = |
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& ( 1. _d 0 - tanh((thx-thy)/theps) ) * thx/2.+ |
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& ( 1. _d 0 + tanh((thx-thy)/theps) ) * thy/2. |
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|
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#else |
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freefe(i,j,k) = MIN(freefe(i,j,k),freefemax) |
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#endif |
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fe(i,j,k) = FeL+freefe(i,j,k) |
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#endif |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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#endif /* ALLOW_FE */ |
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RETURN |
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END |
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