/[MITgcm]/MITgcm/pkg/dic/dic_surfforcing.F
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revision 1.2 by stephd, Wed Jul 9 19:59:18 2003 UTC revision 1.7 by jmc, Sun Jul 18 01:13:50 2004 UTC
# Line 1  Line 1 
1  #include "CPP_OPTIONS.h"  C $Header$
2    C $Name$
3    
4    #include "DIC_OPTIONS.h"
5  #include "PTRACERS_OPTIONS.h"  #include "PTRACERS_OPTIONS.h"
6  #include "GCHEM_OPTIONS.h"  #include "GCHEM_OPTIONS.h"
7    
8  CStartOfInterFace  CBOP
9    C !ROUTINE: DIC_SURFFORCING
10    
11    C !INTERFACE: ==========================================================
12        SUBROUTINE DIC_SURFFORCING( PTR_CO2 , GDC,        SUBROUTINE DIC_SURFFORCING( PTR_CO2 , GDC,
13       I           bi,bj,imin,imax,jmin,jmax,       I           bi,bj,imin,imax,jmin,jmax,
14       I           myIter,myTime,myThid)       I           myIter,myTime,myThid)
15    
16  C     /==========================================================\  C !DESCRIPTION:
17  C     | SUBROUTINE DIC_SURFFORCING                               |  C  Calculate the carbon air-sea flux terms              
18  C     | o Calculate the carbon air-sea flux terms                |  C  following external_forcing_dic.F (OCMIP run) from Mick            
 C     | o following external_forcing_dic.F from Mick             |  
 C     |==========================================================|  
       IMPLICIT NONE  
19    
20  C     == GLobal variables ==  C !USES: ===============================================================
21          IMPLICIT NONE
22  #include "SIZE.h"  #include "SIZE.h"
23  #include "DYNVARS.h"  #include "DYNVARS.h"
24  #include "EEPARAMS.h"  #include "EEPARAMS.h"
# Line 23  C     == GLobal variables == Line 27  C     == GLobal variables ==
27  #include "FFIELDS.h"  #include "FFIELDS.h"
28  #include "DIC_ABIOTIC.h"  #include "DIC_ABIOTIC.h"
29  #ifdef DIC_BIOTIC  #ifdef DIC_BIOTIC
30    #include "PTRACERS_SIZE.h"
31  #include "PTRACERS.h"  #include "PTRACERS.h"
32  #endif  #endif
33    
34  C     == Routine arguments ==  C !INPUT PARAMETERS: ===================================================
35    C  myThid               :: thread number
36    C  myIter               :: current timestep
37    C  myTime               :: current time
38    c  PTR_CO2              :: DIC tracer field
39        INTEGER myIter, myThid        INTEGER myIter, myThid
40        _RL myTime        _RL myTime
41        _RL  PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)        _RL  PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
       _RL  GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)  
42        INTEGER iMin,iMax,jMin,jMax, bi, bj        INTEGER iMin,iMax,jMin,jMax, bi, bj
43    
44    C !OUTPUT PARAMETERS: ===================================================
45    c GDC                   :: surface flux due to air-sea exchange
46          _RL  GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
47    
48  #ifdef ALLOW_PTRACERS  #ifdef ALLOW_PTRACERS
49  #ifdef DIC_ABIOTIC  
50  C     == Local variables ==  C !LOCAL VARIABLES: ====================================================
51         INTEGER I,J, kLev, it         INTEGER I,J, kLev, it
52  C Number of iterations for pCO2 solvers...  C Number of iterations for pCO2 solvers...
       INTEGER inewtonmax  
       INTEGER ibrackmax  
       INTEGER donewt  
53  C Solubility relation coefficients  C Solubility relation coefficients
54        _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
55        _RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
# Line 50  C local variables for carbon chem Line 59  C local variables for carbon chem
59        _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
60        _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
61        _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
62    CEOP
63    
64  cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc  cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
65    
# Line 80  cQQQQ check ptracer numbers Line 90  cQQQQ check ptracer numbers
90               surfphos(i,j)  = 5.1225e-4 * maskC(i,j,kLev,bi,bj)               surfphos(i,j)  = 5.1225e-4 * maskC(i,j,kLev,bi,bj)
91  #endif  #endif
92  C FOR NON-INTERACTIVE Si  C FOR NON-INTERACTIVE Si
93               surfsi(i,j)   = 7.6838e-3 * maskC(i,j,kLev,bi,bj)               surfsi(i,j)   = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj)
94            ENDDO            ENDDO
95           ENDDO           ENDDO
96    
# Line 89  C FOR NON-INTERACTIVE Si Line 99  C FOR NON-INTERACTIVE Si
99       I                       bi,bj,iMin,iMax,jMin,jMax)       I                       bi,bj,iMin,iMax,jMin,jMax)
100  C====================================================================  C====================================================================
101    
 #define PH_APPROX  
 c set number of iterations for [H+] solvers  
 #ifdef PH_APPROX  
        inewtonmax = 1  
 #else  
        inewtonmax = 10  
 #endif  
        ibrackmax = 30  
 C determine pCO2 in surface ocean  
 C set guess of pH for first step here  
 C IF first step THEN use bracket-bisection for first step,  
 C and determine carbon coefficients for safety  
 C ELSE use newton-raphson with previous H+(x,y) as first guess  
   
        donewt=1  
   
 c for first few timesteps  
        IF(myIter .le. (nIter0+inewtonmax) )then  
           donewt=0  
           DO j=1-OLy,sNy+OLy  
            DO i=1-OLx,sNx+OLx  
                   pH(i,j,bi,bj) = 8.0  
            ENDDO  
           ENDDO  
 #ifdef PH_APPROX  
           print*,'QQ: pCO2 approximation method'  
 c first approxmation  
        DO j=1-OLy,sNy+OLy  
         DO i=1-OLx,sNx+OLx  
          do it=1,10  
           CALL CALC_PCO2_APPROX(  
      I        theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj),  
      I        PTR_CO2(i,j,kLev), surfphos(i,j),  
      I        surfsi(i,j),surfalk(i,j),  
      I        ak1(i,j,bi,bj),ak2(i,j,bi,bj),  
      I        ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),  
      I        aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),  
      I        aksi(i,j,bi,bj),akf(i,j,bi,bj),ff(i,j,bi,bj),  
      I        bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),  
      U        pH(i,j,bi,bj),pCO2(i,j,bi,bj) )  
          enddo  
         ENDDO  
        ENDDO  
 #else  
           print*,'QQ: pCO2 full method'  
 #endif  
        ENDIF  
   
   
102  c pCO2 solver...  c pCO2 solver...
103    C$TAF LOOP = parallel
104         DO j=1-OLy,sNy+OLy         DO j=1-OLy,sNy+OLy
105    C$TAF LOOP = parallel
106          DO i=1-OLx,sNx+OLx          DO i=1-OLx,sNx+OLx
107    
108            IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN            IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN
 #ifdef PH_APPROX  
109              CALL CALC_PCO2_APPROX(              CALL CALC_PCO2_APPROX(
110       I        theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj),       I        theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj),
111       I        PTR_CO2(i,j,kLev), surfphos(i,j),       I        PTR_CO2(i,j,kLev), surfphos(i,j),
# Line 154  c pCO2 solver... Line 116  c pCO2 solver...
116       I        aksi(i,j,bi,bj),akf(i,j,bi,bj),ff(i,j,bi,bj),       I        aksi(i,j,bi,bj),akf(i,j,bi,bj),ff(i,j,bi,bj),
117       I        bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),       I        bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),
118       U        pH(i,j,bi,bj),pCO2(i,j,bi,bj) )       U        pH(i,j,bi,bj),pCO2(i,j,bi,bj) )
 #else  
             CALL CALC_PCO2(donewt,inewtonmax,ibrackmax,  
      I        theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj),  
      I        PTR_CO2(i,j,kLev), surfphos(i,j),  
      I        surfsi(i,j),surfalk(i,j),  
      I        ak1(i,j,bi,bj),ak2(i,j,bi,bj),  
      I        ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),  
      I        aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),  
      I        aksi(i,j,bi,bj),akf(i,j,bi,bj),ff(i,j,bi,bj),  
      I        bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),  
      U        pH(i,j,bi,bj),pCO2(i,j,bi,bj) )  
 #endif  
119            ELSE            ELSE
120               pCO2(i,j,bi,bj)=0. _d 0               pCO2(i,j,bi,bj)=0. _d 0
121            END IF            END IF
# Line 222  C Positive EminusPforV => loss of water Line 172  C Positive EminusPforV => loss of water
172  C in salinity. Thus, also increase in other surface tracers  C in salinity. Thus, also increase in other surface tracers
173  C (i.e. positive virtual flux into surface layer)  C (i.e. positive virtual flux into surface layer)
174  C ...so here, VirtualFLux = dC/dt!  C ...so here, VirtualFLux = dC/dt!
175                VirtualFlux(i,j)=gsm_DIC*surfaceTendencyS(i,j,bi,bj)/gsm_s                VirtualFlux(i,j)=gsm_DIC*surfaceForcingS(i,j,bi,bj)/gsm_s
176  c OR  c OR
177  c let virtual flux be zero  c let virtual flux be zero
178  c              VirtualFlux(i,j)=0.d0  c              VirtualFlux(i,j)=0.d0
# Line 237  C update tendency Line 187  C update tendency
187           DO j=1-OLy,sNy+OLy           DO j=1-OLy,sNy+OLy
188            DO i=1-OLx,sNx+OLx            DO i=1-OLx,sNx+OLx
189             GDC(i,j)= maskC(i,j,kLev,bi,bj)*(             GDC(i,j)= maskC(i,j,kLev,bi,bj)*(
190       &                    FluxCO2(i,j,bi,bj)*recip_drF(kLev)       &                    FluxCO2(i,j,bi,bj)
191       &                    + VirtualFlux(i,j)       &                    + VirtualFlux(i,j)
192       &                                              )       &                                              )
193            ENDDO            ENDDO
194           ENDDO           ENDDO
195    
196  #endif  #endif
 #endif  
197          RETURN          RETURN
198          END          END
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