/[MITgcm]/MITgcm/pkg/dic/dic_surfforcing.F
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revision 1.21 by dfer, Mon Apr 7 20:31:16 2008 UTC revision 1.24 by jmc, Mon Apr 12 20:07:57 2010 UTC
# Line 8  CBOP Line 8  CBOP
8  C !ROUTINE: DIC_SURFFORCING  C !ROUTINE: DIC_SURFFORCING
9    
10  C !INTERFACE: ==========================================================  C !INTERFACE: ==========================================================
11        SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC,        SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC,
12       I           bi,bj,imin,imax,jmin,jmax,       I           bi,bj,imin,imax,jmin,jmax,
13       I           myIter,myTime,myThid)       I           myIter,myTime,myThid)
14    
15  C !DESCRIPTION:  C !DESCRIPTION:
16  C  Calculate the carbon air-sea flux terms                C  Calculate the carbon air-sea flux terms
17  C  following external_forcing_dic.F (OCMIP run) from Mick              C  following external_forcing_dic.F (OCMIP run) from Mick
18    
19  C !USES: ===============================================================  C !USES: ===============================================================
20        IMPLICIT NONE        IMPLICIT NONE
# Line 45  c GDC                   :: tendency due Line 45  c GDC                   :: tendency due
45  #ifdef ALLOW_PTRACERS  #ifdef ALLOW_PTRACERS
46    
47  C !LOCAL VARIABLES: ====================================================  C !LOCAL VARIABLES: ====================================================
48         INTEGER I,J, kLev, it         INTEGER i,j, kLev
49  C Number of iterations for pCO2 solvers...  C Number of iterations for pCO2 solvers...
50  C Solubility relation coefficients  C Solubility relation coefficients
51        _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
# Line 100  C FOR NON-INTERACTIVE Si Line 100  C FOR NON-INTERACTIVE Si
100    
101           CALL CARBON_COEFFS(           CALL CARBON_COEFFS(
102       I                       theta,salt,       I                       theta,salt,
103       I                       bi,bj,iMin,iMax,jMin,jMax)       I                       bi,bj,iMin,iMax,jMin,jMax,myThid)
104  C====================================================================  C====================================================================
105    
106         DO j=jmin,jmax         DO j=jmin,jmax
# Line 141  C$TAF LOOP = parallel Line 141  C$TAF LOOP = parallel
141       I        aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),       I        aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),
142       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),
143       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),
144       U        pH(i,j,bi,bj),pCO2(i,j,bi,bj) )       U        pH(i,j,bi,bj),pCO2(i,j,bi,bj),
145         I        i,j,kLev,bi,bj,myIter,myThid )
146            ELSE            ELSE
147              pCO2(i,j,bi,bj)=0. _d 0              pCO2(i,j,bi,bj)=0. _d 0
148            ENDIF            ENDIF
# Line 153  C$TAF LOOP = parallel Line 154  C$TAF LOOP = parallel
154    
155            IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN            IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN
156  C calculate SCHMIDT NO. for CO2  C calculate SCHMIDT NO. for CO2
157                SchmidtNoDIC(i,j) =                SchmidtNoDIC(i,j) =
158       &            sca1       &            sca1
159       &          + sca2 * theta(i,j,kLev,bi,bj)       &          + sca2 * theta(i,j,kLev,bi,bj)
160       &          + sca3 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)         &          + sca3 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)
161       &          + sca4 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)       &          + sca4 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)
162       &                *theta(i,j,kLev,bi,bj)       &                *theta(i,j,kLev,bi,bj)
163    
164  C Determine surface flux (FDIC)  C Determine surface flux (FDIC)
165  C first correct pCO2at for surface atmos pressure  C first correct pCO2at for surface atmos pressure
166                pCO2sat(i,j) =                pCO2sat(i,j) =
167       &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)       &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)
168    
169  C then account for Schmidt number  C then account for Schmidt number
# Line 173  C Calculate flux in terms of DIC units u Line 174  C Calculate flux in terms of DIC units u
174  C Flux = Vp * ([CO2sat] - [CO2])  C Flux = Vp * ([CO2sat] - [CO2])
175  C CO2sat = K0*pCO2atmos*P/P0  C CO2sat = K0*pCO2atmos*P/P0
176  C Converting pCO2 to [CO2] using ff, as in CALC_PCO2  C Converting pCO2 to [CO2] using ff, as in CALC_PCO2
177                FluxCO2(i,j,bi,bj) =                FluxCO2(i,j,bi,bj) =
178       &         Kwexch(i,j)*(       &         Kwexch(i,j)*(
179       &         ak0(i,j,bi,bj)*pCO2sat(i,j) -       &         ak0(i,j,bi,bj)*pCO2sat(i,j) -
180       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)
181       &         )       &         )
182            ELSE            ELSE
183                FluxCO2(i,j,bi,bj) = 0. _d 0                FluxCO2(i,j,bi,bj) = 0. _d 0
184            ENDIF            ENDIF
# Line 205  c Line 206  c
206            ENDDO            ENDDO
207           ENDDO           ENDDO
208    
209  C update tendency        C update tendency
210           DO j=jmin,jmax           DO j=jmin,jmax
211            DO i=imin,imax            DO i=imin,imax
212             GDC(i,j)= recip_drF(kLev)*recip_hFacC(i,j,kLev,bi,bj)             GDC(i,j)= recip_drF(kLev)*recip_hFacC(i,j,kLev,bi,bj)
213       &              *(FluxCO2(i,j,bi,bj)       &              *(FluxCO2(i,j,bi,bj)
214  #ifdef ALLOW_OLD_VIRTUALFLUX  #ifdef ALLOW_OLD_VIRTUALFLUX
215       &              + VirtualFlux(i,j)       &              + VirtualFlux(i,j)
216  #endif  #endif
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