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C $Header: /u/gcmpack/MITgcm/pkg/dic/dic_atmos.F,v 1.15 2010/04/11 20:59:27 jmc Exp $ |
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C $Name: $ |
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|
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#include "DIC_OPTIONS.h" |
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#include "PTRACERS_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: DIC_ATMOS |
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|
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C !INTERFACE: ========================================================== |
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SUBROUTINE DIC_ATMOS( istate, myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: |
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C Calculate the atmospheric pCO2 |
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C dic_int1: |
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C 0=use default 278.d-6 |
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C 1=use constant value - dic_pCO2, read in from data.dic |
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C 2=read in from file |
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C 3=interact with atmospheric box (use dic_pCO2 as initial atmos. value) |
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|
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C !USES: =============================================================== |
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IMPLICIT NONE |
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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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#include "PTRACERS_SIZE.h" |
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#include "PTRACERS_PARAMS.h" |
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#include "PTRACERS_FIELDS.h" |
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#include "DIC_ATMOS.h" |
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|
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C !INPUT PARAMETERS: =================================================== |
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C istate :: 0=initial call, 1=subsequent calls |
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C myTime :: current time |
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C myIter :: current iteration number |
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C myThid :: my Thread Id number |
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INTEGER istate |
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_RL myTime |
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INTEGER myIter, myThid |
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|
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#ifdef ALLOW_DIC |
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|
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#ifdef USE_ATMOSCO2 |
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C if coupled to atmsopheric model, use the |
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C CO2 value passed from the coupler |
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|
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#else /* USE_ATMOSCO2 */ |
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|
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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 total_atmos_moles :: atmosphere total gas content (should be parameter) |
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_RL total_atmos_moles |
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INTEGER bi, bj, i,j,k |
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INTEGER ntim |
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|
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_RL tile_flux (nSx,nSy) |
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_RL tile_carbon(nSx,nSy) |
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_RL total_flux |
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_RL total_carbon |
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|
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C for carbon budget ouput |
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INTEGER ioUnit |
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_RL total_ocean_carbon_old |
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_RL total_atmos_carbon_old |
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_RL total_carbon_old, carbon_diff |
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_RL year_diff_ocean, year_diff_atmos, year_total |
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_RL start_diff_ocean, start_diff_atmos, start_total |
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C variables for reading CO2 input files |
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_RL tmp |
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_RL aWght, bWght |
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|
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LOGICAL timeCO2budget |
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CEOP |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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ioUnit = standardMessageUnit |
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|
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C user specified value (or default = 278 ppm)- set only once |
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IF ( (dic_int1.EQ.0 .OR. dic_int1.EQ.1) .AND. istate.EQ.0 ) THEN |
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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=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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AtmospCO2(i,j,bi,bj)=dic_pCO2 |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C read from a file (note: |
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C dic_int2=number entries to read |
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C dic_int3=start timestep, |
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C dic_int4=timestep between file entries) |
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IF (dic_int1.EQ.2) THEN |
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C linearly interpolate between file entries |
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ntim=int((myIter-dic_int3)/dic_int4)+1 |
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aWght = FLOAT(myIter-dic_int3) |
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bWght = FLOAT(dic_int4) |
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aWght = 0.5 _d 0 + aWght/bWght - FLOAT(ntim-1) |
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IF (aWght.GT.1. _d 0) THEN |
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ntim=ntim+1 |
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aWght=aWght-1. _d 0 |
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ENDIF |
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bWght = 1. _d 0 - aWght |
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tmp=co2atmos(ntim)*bWght+co2atmos(ntim+1)*aWght |
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WRITE(ioUnit,*) 'weights',ntim, aWght, bWght, tmp |
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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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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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AtmospCO2(i,j,bi,bj)=tmp |
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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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ENDIF |
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|
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C interactive atmosphere |
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IF (dic_int1.EQ.3) THEN |
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|
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C Mass dry atmosphere = (5.1352+/-0.0003)d18 kg (Trenberth & Smith, |
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C Journal of Climate 2005) |
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C and Mean molecular mass air = 28.97 g/mol (NASA earth fact sheet) |
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total_atmos_moles= 1.77 _d 20 |
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C for 278ppmv we need total_atmos_carbon=4.9206e+16 |
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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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tile_flux(bi,bj) = 0. |
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tile_carbon(bi,bj) = 0. |
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IF (istate.GT.0) THEN |
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DO j=1,sNy |
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DO i=1,sNx |
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tile_flux(bi,bj) = tile_flux(bi,bj) |
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& + FluxCO2(i,j,bi,bj)*rA(i,j,bi,bj) |
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& *maskC(i,j,1,bi,bj)*dTtracerLev(1) |
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ENDDO |
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ENDDO |
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ENDIF |
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DO k=1,Nr |
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DO j=1,sNy |
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DO i=1,sNx |
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tile_carbon(bi,bj) = tile_carbon(bi,bj) |
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& + ( pTracer(i,j,k,bi,bj,1) |
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#ifdef DIC_BIOTIC |
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& +R_cp*pTracer(i,j,k,bi,bj,4) |
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#endif |
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& ) * rA(i,j,bi,bj) |
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& *drF(k)*hFacC(i,j,k,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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ENDDO |
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|
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CALL GLOBAL_SUM_TILE_RL( tile_flux, total_flux, myThid ) |
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CALL GLOBAL_SUM_TILE_RL( tile_carbon, total_carbon, myThid ) |
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|
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IF (istate.EQ.0) THEN |
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C use dic_pCO2 as initial atmospheric pCO2 (not restart case): |
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_BEGIN_MASTER(myThid) |
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atpco2 = dic_pCO2 |
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total_atmos_carbon = total_atmos_moles*dic_pCO2 |
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_END_MASTER(myThid) |
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IF ( nIter0.GT.PTRACERS_Iter0 .OR. |
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& (nIter0.EQ.PTRACERS_Iter0 .AND. pickupSuff.NE.' ') |
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& ) THEN |
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C restart case: read previous atmospheric CO2 content & pCO2 from pickup file |
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CALL DIC_READ_CO2_PICKUP( nIter0, myThid ) |
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ENDIF |
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_BEGIN_MASTER(myThid) |
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C store initial content: |
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total_ocean_carbon_start=total_carbon |
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total_atmos_carbon_start=total_atmos_carbon |
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total_ocean_carbon_old = total_carbon |
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total_atmos_carbon_old = total_atmos_carbon |
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_END_MASTER(myThid) |
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ELSE |
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_BEGIN_MASTER(myThid) |
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#ifdef ALLOW_AUTODIFF_TAMC |
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atpco2 = dic_pCO2 |
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#endif |
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C store previous content: |
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total_ocean_carbon_old = total_ocean_carbon |
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total_atmos_carbon_old = total_atmos_carbon |
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C calculate new atmos pCO2 |
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total_atmos_carbon = total_atmos_carbon - total_flux |
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_END_MASTER(myThid) |
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ENDIF |
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_BEGIN_MASTER(myThid) |
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total_ocean_carbon = total_carbon |
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atpco2 = total_atmos_carbon/total_atmos_moles |
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|
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WRITE(ioUnit,*) 'QQ atmos C, total, pCo2', |
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& total_atmos_carbon, atpco2 |
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total_carbon=total_atmos_carbon + total_ocean_carbon |
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total_carbon_old=total_atmos_carbon_old + total_ocean_carbon_old |
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carbon_diff=total_carbon-total_carbon_old |
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WRITE(ioUnit,*) 'QQ total C, current, old, diff', |
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& total_carbon, total_carbon_old, carbon_diff |
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carbon_diff=total_ocean_carbon-total_ocean_carbon_old |
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WRITE(ioUnit,*) 'QQ ocean C, current, old, diff', |
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& total_ocean_carbon, total_ocean_carbon_old, carbon_diff |
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WRITE(ioUnit,*) 'QQ air-sea flux, addition diff', |
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& total_flux, carbon_diff-total_flux |
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|
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C if end of forcing cycle, find total change in ocean carbon |
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IF (istate.EQ.0) THEN |
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total_ocean_carbon_year = total_ocean_carbon |
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total_atmos_carbon_year = total_atmos_carbon |
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ELSE |
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timeCO2budget = |
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& DIFFERENT_MULTIPLE(externForcingCycle,myTime,deltaTClock) |
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IF ( timeCO2budget ) THEN |
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year_diff_ocean = total_ocean_carbon-total_ocean_carbon_year |
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year_diff_atmos = total_atmos_carbon-total_atmos_carbon_year |
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year_total = (total_ocean_carbon+total_atmos_carbon) - |
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& (total_ocean_carbon_year+total_atmos_carbon_year) |
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start_diff_ocean = total_ocean_carbon-total_ocean_carbon_start |
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start_diff_atmos = total_atmos_carbon-total_atmos_carbon_start |
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start_total = (total_ocean_carbon+total_atmos_carbon) - |
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& (total_ocean_carbon_start+total_atmos_carbon_start) |
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WRITE(ioUnit,*) 'QQ YEAR END' |
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WRITE(ioUnit,*) 'year diff: ocean, atmos, total', |
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& year_diff_ocean, year_diff_atmos, year_total |
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WRITE(ioUnit,*) 'start diff: ocean, atmos, total ', |
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& start_diff_ocean, start_diff_atmos, start_total |
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|
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total_ocean_carbon_year = total_ocean_carbon |
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total_atmos_carbon_year = total_atmos_carbon |
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ENDIF |
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ENDIF |
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|
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_END_MASTER(myThid) |
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_BARRIER |
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|
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C-- Set AtmospCO2 for next iteration: |
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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=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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AtmospCO2(i,j,bi,bj) = atpco2 |
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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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ENDIF |
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|
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#endif /* ndef USE_ATMOSCO2 */ |
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|
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#endif /* ALLOW_DIC */ |
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|
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RETURN |
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END |
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