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C $Header: /u/gcmpack/MITgcm_contrib/bling/pkg/bling_carbonate_sys.F,v 1.1 2014/05/23 17:33:42 mmazloff Exp $ |
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C $Name: $ |
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|
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#include "BLING_OPTIONS.h" |
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|
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CBOP |
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subroutine BLING_CARBONATE_SYS( |
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I PTR_DIC, PTR_ALK, PTR_NUT, |
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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 bling_carbonate_sys |
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C | o Calculate carbonate fluxes |
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C | Also update pH (3d field) |
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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 "DYNVARS.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 "BLING_VARS.h" |
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|
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C == Routine arguments == |
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C PTR_DIC :: dissolved inorganic carbon |
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C PTR_ALK :: alkalinity |
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C PTR_NUT :: macro-nutrient |
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C myThid :: thread Id. number |
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C myIter :: current timestep |
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C myTime :: current time |
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INTEGER myThid |
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INTEGER myIter |
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_RL myTime |
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_RL PTR_DIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL PTR_ALK(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL PTR_NUT(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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INTEGER imin, imax, jmin, jmax, bi, bj |
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|
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#ifdef ALLOW_PTRACERS |
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|
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C == Local variables == |
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C i,j,k :: loop indices |
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C carbonate :: local value of calcium carbonate |
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C calcium :: local value of Ca |
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C diclocal :: local value of DIC |
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C alklocal :: local value of ALK |
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C pCO2local :: local value of pCO2 |
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C pHlocal :: local value of pH |
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C CO3ITER :: iterations counter for CO3 ion calculation |
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C CO3ITERmax :: total number of iterations |
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C silicaDEEP :: subsurface silica concentration |
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INTEGER i,j,k |
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_RL carbonate |
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_RL calcium |
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_RL po4local |
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_RL diclocal |
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_RL alklocal |
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_RL pCO2local |
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_RL pHlocal |
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_RL silicaDEEP |
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INTEGER CO3ITER |
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INTEGER CO3ITERmax |
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CEOP |
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|
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C Assume constant deep silica value |
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C 30 micromol = 0.03 mol m-3 |
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C This is temporary until SiBLING is included |
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C Since pH is now a 3D field and is solved for at every time step |
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C few iterations are needed |
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CO3itermax = 1 |
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|
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C determine carbonate ion concentration through full domain |
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C determine calcite saturation state |
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|
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C$TAF LOOP = parallel |
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DO k=1,Nr |
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C Get coefficients for carbonate calculations |
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CALL CARBON_COEFFS_PRESSURE_DEP( |
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I theta, salt, |
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I bi, bj, imin, imax, jmin, jmax, |
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I k, myThid) |
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C-------------------------------------------------- |
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|
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C$TAF LOOP = parallel |
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DO j=jMin,jMax |
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C$TAF LOOP = parallel |
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DO i=iMin,iMax |
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IF ( hFacC(i,j,k,bi,bj) .gt. 0. _d 0) THEN |
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C$TAF init dic_caco3 = static, 2 |
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|
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C Estimate calcium concentration from salinity |
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calcium = 1.028 _d -2*salt(i,j,k,bi,bj)/35. _d 0 |
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|
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po4local = PTR_NUT(i,j,k)/NUTfac |
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diclocal = PTR_DIC(i,j,k) |
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alklocal = PTR_ALK(i,j,k) |
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pHlocal = pH(i,j,k,bi,bj) |
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silicaDEEP = 0.03 _d 0 |
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|
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C Evaluate carbonate (CO3) ions concentration |
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C iteratively |
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c DO CO3iter = 1, CO3itermax |
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C$TAF STORE pHlocal, diclocal = dic_caco3 |
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C$TAF STORE alklocal, po4local, silicaDEEP = dic_caco3 |
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C-------------------------------------------------- |
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|
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CALL CALC_PCO2_APPROX( |
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I theta(i,j,k,bi,bj),salt(i,j,k,bi,bj), |
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I diclocal, po4local, |
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I silicaDEEP,alklocal, |
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I ak1(i,j,bi,bj),ak2(i,j,bi,bj), |
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I ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj), |
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I aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj), |
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I aksi(i,j,bi,bj),akf(i,j,bi,bj), |
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I ak0(i,j,bi,bj), fugf(i,j,bi,bj), ff(i,j,bi,bj), |
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I bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj), |
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U pHlocal,pCO2local,carbonate, |
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I i,j,k,bi,bj,myIter,myThid ) |
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c ENDDO |
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pH(i,j,k,bi,bj) = pHlocal |
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C Calculate calcium carbonate (calcite and aragonite) |
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C saturation state |
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omegaC(i,j,k,bi,bj) = calcium * carbonate / |
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& Ksp_TP_Calc(i,j,bi,bj) |
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omegaAr(i,j,k,bi,bj) = calcium * carbonate / |
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& Ksp_TP_Arag(i,j,bi,bj) |
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|
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else |
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omegaC(i,j,k,bi,bj) = 0. _d 0 |
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omegaAr(i,j,k,bi,bj) = 0. _d 0 |
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endif |
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ENDDO |
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ENDDO |
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ENDDO |
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#endif /* ALLOW_PTRACERS */ |
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RETURN |
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END |
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