pkg/dic/dic_surfforcing.F

6d54cf9ca1 Ed H*0001 #include "DIC_OPTIONS.h"
11c3150c71 Mart*0002 #ifdef ALLOW_AUTODIFF
                0003 # include "AUTODIFF_OPTIONS.h"
                0004 #endif
daab022f42 Step*0005
08536d17ba Step*0006 CBOP
                0007 C !ROUTINE: DIC_SURFFORCING
                0008
                0009 C !INTERFACE: ==========================================================
e098791e51 Jean*0010       SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC,
a1d0e455fd Hann*0011      I           bi, bj, iMin, iMax, jMin, jMax,
2e3e8c330d Jona*0012      I           myTime, myIter, myThid )
daab022f42 Step*0013
08536d17ba Step*0014 C !DESCRIPTION:
e098791e51 Jean*0015 C  Calculate the carbon air-sea flux terms
                0016 C  following external_forcing_dic.F (OCMIP run) from Mick
daab022f42 Step*0017
08536d17ba Step*0018 C !USES: ===============================================================
                0019       IMPLICIT NONE
daab022f42 Step*0020 #include "SIZE.h"
                0021 #include "DYNVARS.h"
                0022 #include "EEPARAMS.h"
                0023 #include "PARAMS.h"
                0024 #include "GRID.h"
                0025 #include "FFIELDS.h"
2ef8966791 Davi*0026 #include "DIC_VARS.h"
11c3150c71 Mart*0027 #ifdef ALLOW_AUTODIFF_TAMC
                0028 # include "tamc.h"
                0029 #endif
daab022f42 Step*0030
08536d17ba Step*0031 C !INPUT PARAMETERS: ===================================================
a1d0e455fd Hann*0032 C  PTR_CO2              :: DIC tracer field
2e3e8c330d Jona*0033 C  myTime               :: current time
                0034 C  myIter               :: current timestep
                0035 C  myThid               :: thread number
daab022f42 Step*0036       _RL  PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
720e9330bd Step*0037       _RL  PTR_ALK(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
                0038       _RL  PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
daab022f42 Step*0039       INTEGER iMin,iMax,jMin,jMax, bi, bj
2e3e8c330d Jona*0040       _RL myTime
                0041       INTEGER myIter, myThid
daab022f42 Step*0042
08536d17ba Step*0043 C !OUTPUT PARAMETERS: ===================================================
a1d0e455fd Hann*0044 C GDC                   :: tendency due to air-sea exchange
08536d17ba Step*0045       _RL  GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0046
6acab690ae Jona*0047 #ifdef ALLOW_DIC
08536d17ba Step*0048
                0049 C !LOCAL VARIABLES: ====================================================
c845fbfeae Jean*0050        INTEGER i,j, kLev
6acab690ae Jona*0051        LOGICAL debugPrt
e6a52874f7 Davi*0052        _RL co3dummy
daab022f42 Step*0053 C Number of iterations for pCO2 solvers...
                0054 C Solubility relation coefficients
                0055       _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0056       _RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0057       _RL Kwexch(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
c8d7031b60 Davi*0058       _RL pisvel(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
daab022f42 Step*0059 C local variables for carbon chem
                0060       _RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0061       _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0062       _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
8bf2c0e0ad Step*0063       _RL surftemp(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0064       _RL surfsalt(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0065       _RL surfdic(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
04d6738595 Davi*0066 #ifdef ALLOW_OLD_VIRTUALFLUX
daab022f42 Step*0067       _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
04d6738595 Davi*0068 #endif
11c3150c71 Mart*0069 #ifdef ALLOW_AUTODIFF_TAMC
b26a461de7 Mart*0070 C     tkey :: tape key (tile dependent)
edb6656069 Mart*0071       INTEGER tkey
11c3150c71 Mart*0072 #endif
08536d17ba Step*0073 CEOP
daab022f42 Step*0074
a1d0e455fd Hann*0075       kLev = 1
daab022f42 Step*0076
a1d0e455fd Hann*0077 cC if coupled to atmsopheric model, use the
                0078 cC Co2 value passed from the coupler
1ef1c61fb1 Step*0079 c#ifndef USE_ATMOSCO2
                0080 cC PRE-INDUSTRIAL STEADY STATE pCO2 = 278.0 ppmv
                0081 c       DO j=1-OLy,sNy+OLy
                0082 c        DO i=1-OLx,sNx+OLx
                0083 c           AtmospCO2(i,j,bi,bj)=278.0 _d -6
                0084 c        ENDDO
                0085 c       ENDDO
                0086 c#endif
daab022f42 Step*0087
                0088 C =================================================================
                0089 C determine inorganic carbon chem coefficients
a1d0e455fd Hann*0090        DO j=jMin,jMax
                0091         DO i=iMin,iMax
daab022f42 Step*0092 #ifdef DIC_BIOTIC
                0093 cQQQQ check ptracer numbers
8bf2c0e0ad Step*0094 #ifdef DIC_BOUNDS
a1d0e455fd Hann*0095           surfalk(i,j)  = MAX( 0.4 _d 0,
                0096      &                         MIN( 10. _d 0, PTR_ALK(i,j,klev) ) )
                0097      &                  * maskC(i,j,kLev,bi,bj)
                0098           surfphos(i,j) = MAX( 1.0 _d -11,
                0099      &                         MIN( 1. _d -1, PTR_PO4(i,j,klev) ) )
                0100      &                  * maskC(i,j,kLev,bi,bj)
8bf2c0e0ad Step*0101 #else
a1d0e455fd Hann*0102           surfalk(i,j)  = PTR_ALK(i,j,klev)*maskC(i,j,kLev,bi,bj)
                0103           surfphos(i,j) = PTR_PO4(i,j,klev)*maskC(i,j,kLev,bi,bj)
8bf2c0e0ad Step*0104 #endif
6acab690ae Jona*0105 #else /* DIC_BIOTIC */
a1d0e455fd Hann*0106           surfalk(i,j)  = 2.366595 _d 0 * salt(i,j,kLev,bi,bj)/gsm_s
                0107      &                  * maskC(i,j,kLev,bi,bj)
                0108           surfphos(i,j) = 5.1225 _d -4 * maskC(i,j,kLev,bi,bj)
6acab690ae Jona*0109 #endif /* DIC_BIOTIC */
a1d0e455fd Hann*0110 C for non-interactive Si
                0111           surfsi(i,j)   = silicaSurf(i,j,bi,bj)*maskC(i,j,kLev,bi,bj)
8bf2c0e0ad Step*0112 #ifdef DIC_BOUNDS
a1d0e455fd Hann*0113           surftemp(i,j) = MAX( -4. _d 0,
                0114      &                         MIN( 50. _d 0, theta(i,j,kLev,bi,bj) ) )
                0115           surfsalt(i,j) = MAX( 4. _d 0,
                0116      &                         MIN( 50. _d 0, salt(i,j,kLev,bi,bj) ) )
                0117           surfdic(i,j)  = MAX( 0.4 _d 0,
                0118      &                         MIN( 10. _d 0, PTR_CO2(i,j,kLev) ) )
8bf2c0e0ad Step*0119 #else
a1d0e455fd Hann*0120           surftemp(i,j) = theta(i,j,kLev,bi,bj)
                0121           surfsalt(i,j) = salt(i,j,kLev,bi,bj)
                0122           surfdic(i,j)  = PTR_CO2(i,j,kLev)
8bf2c0e0ad Step*0123 #endif
a1d0e455fd Hann*0124         ENDDO
                0125        ENDDO
daab022f42 Step*0126
6acab690ae Jona*0127 #ifdef CARBONCHEM_SOLVESAPHE
                0128 #ifdef ALLOW_DEBUG
                0129       IF (debugMode) CALL DEBUG_CALL('DIC_COEFFS_SURF',myThid)
                0130 #endif
a1d0e455fd Hann*0131        CALL DIC_COEFFS_SURF(
8bf2c0e0ad Step*0132      I                       surftemp,surfsalt,
5625485478 Jean*0133      I                       bi,bj,iMin,iMax,jMin,jMax,myThid)
6acab690ae Jona*0134 #else /* CARBONCHEM_SOLVESAPHE */
                0135 #ifdef ALLOW_DEBUG
                0136       IF (debugMode) CALL DEBUG_CALL('CARBON_COEFFS',myThid)
                0137 #endif
a1d0e455fd Hann*0138        CALL CARBON_COEFFS(
6acab690ae Jona*0139      I                       surftemp,surfsalt,
                0140      I                       bi,bj,iMin,iMax,jMin,jMax,myThid)
                0141 #endif /* CARBONCHEM_SOLVESAPHE */
daab022f42 Step*0142 C====================================================================
                0143
a5bfd8de3c Jean*0144        DO j=jMin,jMax
                0145         DO i=iMin,iMax
c8d7031b60 Davi*0146 C Compute AtmosP and Kwexch_Pre which are re-used for flux of O2
                0147
                0148 #ifdef USE_PLOAD
                0149 C Convert anomalous pressure pLoad (in Pa) from atmospheric model
                0150 C to total pressure (in Atm)
                0151 C Note: it is assumed the reference atmospheric pressure is 1Atm=1013mb
                0152 C       rather than the actual ref. pressure from Atm. model so that on
                0153 C       average AtmosP is about 1 Atm.
b31669ac34 Jean*0154           AtmosP(i,j,bi,bj)= ( surf_pRef + pLoad(i,j,bi,bj) )/Pa2Atm
c8d7031b60 Davi*0155 #endif
                0156
                0157 C Pre-compute part of exchange coefficient: pisvel*(1-fice)
                0158 C Schmidt number is accounted for later
a1d0e455fd Hann*0159           pisvel(i,j) = 0.337 _d 0 *wind(i,j,bi,bj)**2/3.6 _d 5
                0160           Kwexch_Pre(i,j,bi,bj) = pisvel(i,j)
                0161      &                          * (1. _d 0 - fIce(i,j,bi,bj))
c8d7031b60 Davi*0162         ENDDO
                0163        ENDDO
                0164
11c3150c71 Mart*0165 #ifdef ALLOW_AUTODIFF_TAMC
edb6656069 Mart*0166        tkey = bi + (bj-1)*nSx + (ikey_dynamics-1)*nSx*nSy
                0167 CADJ STORE pH(:,:,bi,bj) = comlev1_bibj, key = tkey, kind = isbyte
11c3150c71 Mart*0168 #endif
6acab690ae Jona*0169        debugPrt = debugMode
a1d0e455fd Hann*0170 C pCO2 solver...
29ad036528 Step*0171 C$TAF LOOP = parallel
a5bfd8de3c Jean*0172        DO j=jMin,jMax
29ad036528 Step*0173 C$TAF LOOP = parallel
a5bfd8de3c Jean*0174         DO i=iMin,iMax
75e97f1e14 Davi*0175           IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN
6acab690ae Jona*0176 #ifdef CARBONCHEM_SOLVESAPHE
                0177             IF ( selectPHsolver.GT.0 ) THEN
                0178 C Use Munhoven (2013) Solvesaphe routine to calculate pH and pCO2
                0179 #ifdef ALLOW_DEBUG
                0180               IF (debugPrt) CALL DEBUG_CALL(
                0181      &     'CALC_PCO2_SOLVESAPHE from DIC_SURFFORCING',myThid)
                0182 #endif
                0183               CALL CALC_PCO2_SOLVESAPHE(
                0184      I          surftemp(i,j),surfsalt(i,j),
                0185      I          surfdic(i,j), surfphos(i,j),
                0186      I          surfsi(i,j),surfalk(i,j),
                0187      U          pH(i,j,bi,bj),pCO2(i,j,bi,bj),co3dummy,
                0188      I          i,j,kLev,bi,bj, debugPrt, myIter, myThid )
                0189               debugPrt = .FALSE.
                0190             ELSE
                0191 C Use the original Follows et al. (2006) solver
                0192 #endif /* CARBONCHEM_SOLVESAPHE */
                0193 #ifdef ALLOW_DEBUG
                0194               IF (debugPrt) CALL DEBUG_CALL(
                0195      &        'CALC_PCO2_APPROX',myThid)
                0196               debugPrt = .FALSE.
                0197 #endif
                0198               CALL CALC_PCO2_APPROX(
                0199      I          surftemp(i,j),surfsalt(i,j),
                0200      I          surfdic(i,j), surfphos(i,j),
                0201      I          surfsi(i,j),surfalk(i,j),
                0202      I          ak1(i,j,bi,bj),ak2(i,j,bi,bj),
                0203      I          ak1p(i,j,bi,bj),ak2p(i,j,bi,bj),ak3p(i,j,bi,bj),
                0204      I          aks(i,j,bi,bj),akb(i,j,bi,bj),akw(i,j,bi,bj),
                0205      I          aksi(i,j,bi,bj),akf(i,j,bi,bj),
                0206      I          ak0(i,j,bi,bj), fugf(i,j,bi,bj),
                0207      I          ff(i,j,bi,bj),
                0208      I          bt(i,j,bi,bj),st(i,j,bi,bj),ft(i,j,bi,bj),
                0209      U          pH(i,j,bi,bj),pCO2(i,j,bi,bj),co3dummy,
                0210      I          i,j,kLev,bi,bj,myIter, myThid )
                0211 #ifdef CARBONCHEM_SOLVESAPHE
                0212             ENDIF
                0213 #endif /* CARBONCHEM_SOLVESAPHE */
daab022f42 Step*0214           ELSE
75e97f1e14 Davi*0215             pCO2(i,j,bi,bj)=0. _d 0
                0216           ENDIF
daab022f42 Step*0217         ENDDO
                0218        ENDDO
b26a461de7 Mart*0219 #ifdef ALLOW_AUTODIFF_TAMC
                0220 CADJ STORE pCO2(:,:,bi,bj) = comlev1_bibj, key = tkey, kind = isbyte
                0221 #endif
daab022f42 Step*0222
a5bfd8de3c Jean*0223        DO j=jMin,jMax
                0224         DO i=iMin,iMax
daab022f42 Step*0225
75e97f1e14 Davi*0226           IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN
daab022f42 Step*0227 C calculate SCHMIDT NO. for CO2
a1d0e455fd Hann*0228             SchmidtNoDIC(i,j) =
e098791e51 Jean*0229      &            sca1
daab022f42 Step*0230      &          + sca2 * theta(i,j,kLev,bi,bj)
e098791e51 Jean*0231      &          + sca3 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)
                0232      &          + sca4 * theta(i,j,kLev,bi,bj)*theta(i,j,kLev,bi,bj)
daab022f42 Step*0233      &                *theta(i,j,kLev,bi,bj)
a1d0e455fd Hann*0234 C make sure Schmidt number is not negative (will happen if temp>39C)
                0235             SchmidtNoDIC(i,j) = MAX( 1.0 _d -2, SchmidtNoDIC(i,j) )
daab022f42 Step*0236
                0237 C Determine surface flux (FDIC)
                0238 C first correct pCO2at for surface atmos pressure
a1d0e455fd Hann*0239             pCO2sat(i,j) =
daab022f42 Step*0240      &          AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj)
                0241
c8d7031b60 Davi*0242 C then account for Schmidt number
a1d0e455fd Hann*0243             Kwexch(i,j) = Kwexch_Pre(i,j,bi,bj)
                0244      &                  / SQRT(SchmidtNoDIC(i,j)/660.0 _d 0)
daab022f42 Step*0245
d0092a57ac Step*0246 #ifdef WATERVAP_BUG
daab022f42 Step*0247 C Calculate flux in terms of DIC units using K0, solubility
                0248 C Flux = Vp * ([CO2sat] - [CO2])
                0249 C CO2sat = K0*pCO2atmos*P/P0
                0250 C Converting pCO2 to [CO2] using ff, as in CALC_PCO2
a1d0e455fd Hann*0251             FluxCO2(i,j,bi,bj) =
e098791e51 Jean*0252      &         Kwexch(i,j)*(
                0253      &         ak0(i,j,bi,bj)*pCO2sat(i,j) -
                0254      &         ff(i,j,bi,bj)*pCO2(i,j,bi,bj)
                0255      &         )
d0092a57ac Step*0256 #else
a1d0e455fd Hann*0257
f169dabedd Jean*0258 C Corrected by Val Bennington Nov 2010 per G.A. McKinley s finding
d0092a57ac Step*0259 C of error in application of water vapor correction
a1d0e455fd Hann*0260 C Flux = kw*rho*(ff*pCO2atm-k0*FugFac*pCO2ocean)
                0261             FluxCO2(i,j,bi,bj) =
d0092a57ac Step*0262      &          Kwexch(i,j)*(
                0263      &            ff(i,j,bi,bj)*pCO2sat(i,j) -
                0264      &            pCO2(i,j,bi,bj)*fugf(i,j,bi,bj)
                0265      &            *ak0(i,j,bi,bj) )
6acab690ae Jona*0266
d0092a57ac Step*0267 #endif
75e97f1e14 Davi*0268           ELSE
a1d0e455fd Hann*0269             FluxCO2(i,j,bi,bj) = 0. _d 0
75e97f1e14 Davi*0270           ENDIF
daab022f42 Step*0271 C convert flux (mol kg-1 m s-1) to (mol m-2 s-1)
a1d0e455fd Hann*0272           FluxCO2(i,j,bi,bj) = FluxCO2(i,j,bi,bj)/permil
daab022f42 Step*0273
04d6738595 Davi*0274 #ifdef ALLOW_OLD_VIRTUALFLUX
a1d0e455fd Hann*0275           IF (maskC(i,j,kLev,bi,bj).NE.0. _d 0) THEN
                0276 C calculate virtual flux
                0277 C EminusPforV = dS/dt*(1/Sglob)
daab022f42 Step*0278 C NOTE: Be very careful with signs here!
                0279 C Positive EminusPforV => loss of water to atmos and increase
                0280 C in salinity. Thus, also increase in other surface tracers
                0281 C (i.e. positive virtual flux into surface layer)
                0282 C ...so here, VirtualFLux = dC/dt!
93d40906a6 Jean*0283               VirtualFlux(i,j)=gsm_DIC*surfaceForcingS(i,j,bi,bj)/gsm_s
a1d0e455fd Hann*0284 C OR
                0285 C let virtual flux be zero
                0286 C              VirtualFlux(i,j)=0.d0
                0287           ELSE
daab022f42 Step*0288               VirtualFlux(i,j)=0. _d 0
a1d0e455fd Hann*0289           ENDIF
04d6738595 Davi*0290 #endif /* ALLOW_OLD_VIRTUALFLUX */
a1d0e455fd Hann*0291         ENDDO
                0292        ENDDO
daab022f42 Step*0293
e098791e51 Jean*0294 C update tendency
a1d0e455fd Hann*0295        DO j=jMin,jMax
                0296         DO i=iMin,iMax
c8d7031b60 Davi*0297            GDC(i,j)= recip_drF(kLev)*recip_hFacC(i,j,kLev,bi,bj)
e098791e51 Jean*0298      &              *(FluxCO2(i,j,bi,bj)
04d6738595 Davi*0299 #ifdef ALLOW_OLD_VIRTUALFLUX
c8d7031b60 Davi*0300      &              + VirtualFlux(i,j)
04d6738595 Davi*0301 #endif
c8d7031b60 Davi*0302      &               )
a1d0e455fd Hann*0303         ENDDO
                0304        ENDDO
daab022f42 Step*0305
6acab690ae Jona*0306 #endif /* ALLOW_DIC */
a1d0e455fd Hann*0307       RETURN
                0308       END