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jmc |
1.16 |
C $Header: /u/gcmpack/MITgcm/pkg/dic/fe_chem.F,v 1.15 2008/06/23 22:26:32 stephd Exp $ |
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jmc |
1.4 |
C $Name: $ |
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edhill |
1.3 |
#include "DIC_OPTIONS.h" |
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stephd |
1.1 |
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jmc |
1.16 |
CBOP |
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C !ROUTINE: Fe_CHEM |
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C !INTERFACE: |
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stephd |
1.1 |
SUBROUTINE Fe_CHEM( |
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jmc |
1.16 |
I bi,bj, iMin,iMax,jMin,jMax, |
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stephd |
1.1 |
I fe, freefe, |
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I myIter, myThid ) |
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jmc |
1.16 |
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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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C !USES: |
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stephd |
1.1 |
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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dfer |
1.12 |
#include "DIC_VARS.h" |
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stephd |
1.1 |
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jmc |
1.16 |
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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stephd |
1.1 |
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jmc |
1.5 |
#ifdef ALLOW_FE |
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jmc |
1.16 |
C !LOCAL VARIABLES: |
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INTEGER i,j,k |
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stephd |
1.1 |
_RL lig, FeL |
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stephd |
1.11 |
_RL tmpfe |
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jmc |
1.16 |
#ifdef AD_SAFE |
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_RL thx, thy, theps |
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#endif |
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stephd |
1.1 |
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jmc |
1.16 |
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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stephd |
1.1 |
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C ligand balance in surface layer |
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C in surface layer |
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jmc |
1.16 |
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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stephd |
1.1 |
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stephd |
1.11 |
#ifdef DIC_NO_NEG |
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jmc |
1.16 |
tmpfe =MAX( 0. _d 0 , fe(i,j,k) ) |
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stephd |
1.11 |
#else |
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jmc |
1.16 |
tmpfe = fe(i,j,k) |
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stephd |
1.11 |
#endif |
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jmc |
1.16 |
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stephd |
1.1 |
C Ligand,FeL,Fe calculation |
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stephd |
1.11 |
lig=(-ligand_stab*tmpfe + |
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dfer |
1.10 |
& ligand_stab*ligand_tot-1. _d 0 |
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jmc |
1.16 |
& +((ligand_stab*tmpfe |
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dfer |
1.10 |
& -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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jmc |
1.16 |
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stephd |
1.1 |
FeL = ligand_tot-lig |
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jmc |
1.16 |
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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stephd |
1.6 |
#ifdef MINFE |
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stephd |
1.9 |
#ifdef AD_SAFE |
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jmc |
1.16 |
thx=freefe(i,j,k) |
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stephd |
1.9 |
thy=freefemax |
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dfer |
1.10 |
theps=1. _d -8 |
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jmc |
1.16 |
freefe(i,j,k) = |
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dfer |
1.10 |
& ( 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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stephd |
1.9 |
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#else |
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jmc |
1.16 |
freefe(i,j,k) = MIN(freefe(i,j,k),freefemax) |
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stephd |
1.9 |
#endif |
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jmc |
1.16 |
fe(i,j,k) = FeL+freefe(i,j,k) |
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stephd |
1.6 |
#endif |
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jmc |
1.16 |
ENDIF |
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stephd |
1.1 |
ENDDO |
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ENDDO |
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jmc |
1.16 |
ENDDO |
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#endif /* ALLOW_FE */ |
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RETURN |
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END |
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