/[MITgcm]/MITgcm/pkg/dic/dic_surfforcing.F
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revision 1.24 by jmc, Mon Apr 12 20:07:57 2010 UTC revision 1.27 by stephd, Thu May 5 22:23:27 2011 UTC
# Line 56  C local variables for carbon chem Line 56  C local variables for carbon chem
56        _RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
57        _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
58        _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
59          _RL surftemp(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
60          _RL surfsalt(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
61          _RL surfdic(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
62  #ifdef ALLOW_OLD_VIRTUALFLUX  #ifdef ALLOW_OLD_VIRTUALFLUX
63        _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
64  #endif  #endif
# Line 84  C determine inorganic carbon chem coeffi Line 87  C determine inorganic carbon chem coeffi
87    
88  #ifdef DIC_BIOTIC  #ifdef DIC_BIOTIC
89  cQQQQ check ptracer numbers  cQQQQ check ptracer numbers
90    #ifdef DIC_BOUNDS
91                 surfalk(i,j) = max(0.4 _d 0,
92         &                          min(10. _d 0,PTR_ALK(i,j,klev)))
93         &                          * maskC(i,j,kLev,bi,bj)
94                 surfphos(i,j)  = max(1.0 _d -11,
95         &                          min(1._d -1, PTR_PO4(i,j,klev)))
96         &                          * maskC(i,j,kLev,bi,bj)
97    #else
98               surfalk(i,j) = PTR_ALK(i,j,klev)               surfalk(i,j) = PTR_ALK(i,j,klev)
99       &                          * maskC(i,j,kLev,bi,bj)       &                          * maskC(i,j,kLev,bi,bj)
100               surfphos(i,j)  = PTR_PO4(i,j,klev)               surfphos(i,j)  = PTR_PO4(i,j,klev)
101       &                          * maskC(i,j,kLev,bi,bj)       &                          * maskC(i,j,kLev,bi,bj)
102    #endif
103  #else  #else
104               surfalk(i,j) = 2.366595 _d 0 * salt(i,j,kLev,bi,bj)/gsm_s               surfalk(i,j) = 2.366595 _d 0 * salt(i,j,kLev,bi,bj)/gsm_s
105       &                          * maskC(i,j,kLev,bi,bj)       &                          * maskC(i,j,kLev,bi,bj)
# Line 95  cQQQQ check ptracer numbers Line 107  cQQQQ check ptracer numbers
107  #endif  #endif
108  C FOR NON-INTERACTIVE Si  C FOR NON-INTERACTIVE Si
109               surfsi(i,j)   = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj)               surfsi(i,j)   = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj)
110    #ifdef DIC_BOUNDS
111                surftemp(i,j) = max(-4. _d 0,
112         &                          min(50. _d 0, theta(i,j,kLev,bi,bj)))
113                surfsalt(i,j) = max(4. _d 0,
114         &                          min(50. _d 0, salt(i,j,kLev,bi,bj)))
115                surfdic(i,j)  = max(0.4 _d 0,
116         &                          min(10. _d 0, PTR_CO2(i,j,kLev)))
117    #else
118                surftemp(i,j) = theta(i,j,kLev,bi,bj)
119                surfsalt(i,j) = salt(i,j,kLev,bi,bj)
120                surfdic(i,j)  = PTR_CO2(i,j,kLev)
121    #endif
122            ENDDO            ENDDO
123           ENDDO           ENDDO
124    
125           CALL CARBON_COEFFS(           CALL CARBON_COEFFS(
126       I                       theta,salt,       I                       surftemp,surfsalt,
127       I                       bi,bj,iMin,iMax,jMin,jMax,myThid)       I                       bi,bj,iMin,iMax,jMin,jMax,myThid)
128  C====================================================================  C====================================================================
129    
# Line 133  C$TAF LOOP = parallel Line 157  C$TAF LOOP = parallel
157    
158            IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN            IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN
159              CALL CALC_PCO2_APPROX(              CALL CALC_PCO2_APPROX(
160       I        theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj),       I        surftemp(i,j),surfsalt(i,j),
161       I        PTR_CO2(i,j,kLev), surfphos(i,j),       I        surfdic(i,j), surfphos(i,j),
162       I        surfsi(i,j),surfalk(i,j),       I        surfsi(i,j),surfalk(i,j),
163       I        ak1(i,j,bi,bj),ak2(i,j,bi,bj),       I        ak1(i,j,bi,bj),ak2(i,j,bi,bj),
164       I        ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),       I        ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),
165       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),
166       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),
167         I        ak0(i,j,bi,bj), fugf(i,j,bi,bj),
168         I        ff(i,j,bi,bj),
169       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),
170       U        pH(i,j,bi,bj),pCO2(i,j,bi,bj),       U        pH(i,j,bi,bj),pCO2(i,j,bi,bj),
171       I        i,j,kLev,bi,bj,myIter,myThid )       I        i,j,kLev,bi,bj,myIter,myThid )
# Line 160  C calculate SCHMIDT NO. for CO2 Line 186  C calculate SCHMIDT NO. for CO2
186       &          + 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)
187       &          + 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)
188       &                *theta(i,j,kLev,bi,bj)       &                *theta(i,j,kLev,bi,bj)
189    c make sure Schmidt number isn't negative (will happen if temp>39C)
190                 SchmidtNoDIC(i,j)=max(1.0 _d -2, SchmidtNoDIC(i,j))
191    
192  C Determine surface flux (FDIC)  C Determine surface flux (FDIC)
193  C first correct pCO2at for surface atmos pressure  C first correct pCO2at for surface atmos pressure
# Line 170  C then account for Schmidt number Line 198  C then account for Schmidt number
198                Kwexch(i,j) = Kwexch_Pre(i,j,bi,bj)                Kwexch(i,j) = Kwexch_Pre(i,j,bi,bj)
199       &                    / sqrt(SchmidtNoDIC(i,j)/660.0 _d 0)       &                    / sqrt(SchmidtNoDIC(i,j)/660.0 _d 0)
200    
201    #ifdef WATERVAP_BUG
202  C Calculate flux in terms of DIC units using K0, solubility  C Calculate flux in terms of DIC units using K0, solubility
203  C Flux = Vp * ([CO2sat] - [CO2])  C Flux = Vp * ([CO2sat] - [CO2])
204  C CO2sat = K0*pCO2atmos*P/P0  C CO2sat = K0*pCO2atmos*P/P0
# Line 179  C Converting pCO2 to [CO2] using ff, as Line 208  C Converting pCO2 to [CO2] using ff, as
208       &         ak0(i,j,bi,bj)*pCO2sat(i,j) -       &         ak0(i,j,bi,bj)*pCO2sat(i,j) -
209       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)       &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)
210       &         )       &         )
211    #else
212    C Corrected by Val Bennington Nov 2010 per G.A. McKinley's finding
213    C of error in application of water vapor correction
214    c Flux = kw*rho*(ff*pCO2atm-k0*FugFac*pCO2ocean)
215                   FluxCO2(i,j,bi,bj) =
216         &          Kwexch(i,j)*(
217         &            ff(i,j,bi,bj)*pCO2sat(i,j) -
218         &            pCO2(i,j,bi,bj)*fugf(i,j,bi,bj)
219         &            *ak0(i,j,bi,bj) )
220         &
221    #endif
222            ELSE            ELSE
223                FluxCO2(i,j,bi,bj) = 0. _d 0                FluxCO2(i,j,bi,bj) = 0. _d 0
224            ENDIF            ENDIF
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