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revision 1.1 by stephd, Wed Jun 25 21:00:36 2003 UTC revision 1.11 by stephd, Tue Sep 12 19:58:02 2006 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                   :: tendency 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         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        _RL FluxCO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy)  CEOP
63    
64  cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc  cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
65    
# Line 66  C PRE-INDUSTRIAL STEADY STATE pCO2 = 278 Line 75  C PRE-INDUSTRIAL STEADY STATE pCO2 = 278
75    
76  C =================================================================  C =================================================================
77  C determine inorganic carbon chem coefficients  C determine inorganic carbon chem coefficients
78          DO j=1-OLy,sNy+OLy          DO j=jmin,jmax
79           DO i=1-OLx,sNx+OLx           DO i=imin,imax
80    
81  #ifdef DIC_BIOTIC  #ifdef DIC_BIOTIC
82  cQQQQ check ptracer numbers  cQQQQ check ptracer numbers
# Line 81  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 90  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  
           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  
 #else  
           print*,'QQ: pCO2 full method'  
 #endif  
        ENDIF  
   
   
102  c pCO2 solver...  c pCO2 solver...
103         DO j=1-OLy,sNy+OLy  C$TAF LOOP = parallel
104          DO i=1-OLx,sNx+OLx         DO j=jmin,jmax
105    C$TAF LOOP = parallel
106            DO i=imin,imax
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 153  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
122          ENDDO          ENDDO
123         ENDDO         ENDDO
124    
125         DO j=1-OLy,sNy+OLy         DO j=jmin,jmax
126          DO i=1-OLx,sNx+OLx          DO i=imin,imax
127    
128              IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN              IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN
129  C calculate SCHMIDT NO. for CO2  C calculate SCHMIDT NO. for CO2
# Line 189  C first correct pCO2at for surface atmos Line 140  C first correct pCO2at for surface atmos
140       &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)       &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)
141  c find exchange coefficient  c find exchange coefficient
142  c  account for schmidt number and and varible piston velocity  c  account for schmidt number and and varible piston velocity
143                  pisvel(i,j,bi,bj)  =0.337*wind(i,j,bi,bj)**2/3.6d5
144                Kwexch(i,j) =                Kwexch(i,j) =
145       &             pisvel(i,j,bi,bj)       &             pisvel(i,j,bi,bj)
146       &             / sqrt(SchmidtNoDIC(i,j)/660.0)       &             / sqrt(SchmidtNoDIC(i,j)/660.0)
147  c OR use a constant  coeff  c OR use a constant  coeff
148  c             Kwexch(i,j) = 5e-5  c             Kwexch(i,j) = 5e-5
149  c ice influence  c ice influence
150  cQQ           Kwexch(i,j)  =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j)                Kwexch(i,j)  =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j)
151    
152    
153  C Calculate flux in terms of DIC units using K0, solubility  C Calculate flux in terms of DIC units using K0, solubility
154  C Flux = Vp * ([CO2sat] - [CO2])  C Flux = Vp * ([CO2sat] - [CO2])
155  C CO2sat = K0*pCO2atmos*P/P0  C CO2sat = K0*pCO2atmos*P/P0
156  C Converting pCO2 to [CO2] using ff, as in CALC_PCO2  C Converting pCO2 to [CO2] using ff, as in CALC_PCO2
157                FluxCO2(i,j) =                FluxCO2(i,j,bi,bj) =
158       &         maskC(i,j,kLev,bi,bj)*Kwexch(i,j)*(       &         maskC(i,j,kLev,bi,bj)*Kwexch(i,j)*(
159       &         ak0(i,j,bi,bj)*pCO2sat(i,j) -       &         ak0(i,j,bi,bj)*pCO2sat(i,j) -
160       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)
161       &         )       &         )
162              ELSE              ELSE
163                 FluxCO2(i,j) = 0.                 FluxCO2(i,j,bi,bj) = 0.
164              ENDIF              ENDIF
165  C convert flux (mol kg-1 m s-1) to (mol m-2 s-1)  C convert flux (mol kg-1 m s-1) to (mol m-2 s-1)
166              FluxCO2(i,j) = FluxCO2(i,j)/permil              FluxCO2(i,j,bi,bj) = FluxCO2(i,j,bi,bj)/permil
167    
168              IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN              IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN
169  c calculate virtual flux  c calculate virtual flux
# Line 221  C Positive EminusPforV => loss of water Line 173  C Positive EminusPforV => loss of water
173  C in salinity. Thus, also increase in other surface tracers  C in salinity. Thus, also increase in other surface tracers
174  C (i.e. positive virtual flux into surface layer)  C (i.e. positive virtual flux into surface layer)
175  C ...so here, VirtualFLux = dC/dt!  C ...so here, VirtualFLux = dC/dt!
176                VirtualFlux(i,j)=gsm_DIC*surfaceTendencyS(i,j,bi,bj)/gsm_s                VirtualFlux(i,j)=gsm_DIC*surfaceForcingS(i,j,bi,bj)/gsm_s
177  c OR  c OR
178  c let virtual flux be zero  c let virtual flux be zero
179  c              VirtualFlux(i,j)=0.d0  c              VirtualFlux(i,j)=0.d0
# Line 233  c Line 185  c
185           ENDDO           ENDDO
186    
187  C update tendency        C update tendency      
188           DO j=1-OLy,sNy+OLy           DO j=jmin,jmax
189            DO i=1-OLx,sNx+OLx            DO i=imin,imax
190             GDC(i,j)= maskC(i,j,kLev,bi,bj)*(             GDC(i,j)= maskC(i,j,kLev,bi,bj)*recip_drF(kLev)*
191       &                    FluxCO2(i,j)*recip_drF(kLev)       &                     recip_hFacC(i,j,kLev,bi,bj)*(
192       &                    + VirtualFlux(i,j)       &                    FluxCO2(i,j,bi,bj) + VirtualFlux(i,j)
193       &                                              )       &                                              )
194            ENDDO            ENDDO
195           ENDDO           ENDDO
196    
197  #endif  #endif
 #endif  
198          RETURN          RETURN
199          END          END
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