--- MITgcm/pkg/dic/dic_surfforcing.F 2010/04/11 22:03:53 1.23 +++ MITgcm/pkg/dic/dic_surfforcing.F 2011/05/05 22:23:27 1.27 @@ -1,4 +1,4 @@ -C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/dic/dic_surfforcing.F,v 1.23 2010/04/11 22:03:53 jmc Exp $ +C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/dic/dic_surfforcing.F,v 1.27 2011/05/05 22:23:27 stephd Exp $ C $Name: $ #include "DIC_OPTIONS.h" @@ -8,13 +8,13 @@ C !ROUTINE: DIC_SURFFORCING C !INTERFACE: ========================================================== - SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC, + SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC, I bi,bj,imin,imax,jmin,jmax, I myIter,myTime,myThid) C !DESCRIPTION: -C Calculate the carbon air-sea flux terms -C following external_forcing_dic.F (OCMIP run) from Mick +C Calculate the carbon air-sea flux terms +C following external_forcing_dic.F (OCMIP run) from Mick C !USES: =============================================================== IMPLICIT NONE @@ -56,6 +56,9 @@ _RL surfalk(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL surftemp(1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL surfsalt(1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL surfdic(1-OLx:sNx+OLx,1-OLy:sNy+OLy) #ifdef ALLOW_OLD_VIRTUALFLUX _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy) #endif @@ -84,10 +87,19 @@ #ifdef DIC_BIOTIC cQQQQ check ptracer numbers +#ifdef DIC_BOUNDS + surfalk(i,j) = max(0.4 _d 0, + & min(10. _d 0,PTR_ALK(i,j,klev))) + & * maskC(i,j,kLev,bi,bj) + surfphos(i,j) = max(1.0 _d -11, + & min(1._d -1, PTR_PO4(i,j,klev))) + & * maskC(i,j,kLev,bi,bj) +#else surfalk(i,j) = PTR_ALK(i,j,klev) & * maskC(i,j,kLev,bi,bj) surfphos(i,j) = PTR_PO4(i,j,klev) & * maskC(i,j,kLev,bi,bj) +#endif #else surfalk(i,j) = 2.366595 _d 0 * salt(i,j,kLev,bi,bj)/gsm_s & * maskC(i,j,kLev,bi,bj) @@ -95,11 +107,23 @@ #endif C FOR NON-INTERACTIVE Si surfsi(i,j) = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj) +#ifdef DIC_BOUNDS + surftemp(i,j) = max(-4. _d 0, + & min(50. _d 0, theta(i,j,kLev,bi,bj))) + surfsalt(i,j) = max(4. _d 0, + & min(50. _d 0, salt(i,j,kLev,bi,bj))) + surfdic(i,j) = max(0.4 _d 0, + & min(10. _d 0, PTR_CO2(i,j,kLev))) +#else + surftemp(i,j) = theta(i,j,kLev,bi,bj) + surfsalt(i,j) = salt(i,j,kLev,bi,bj) + surfdic(i,j) = PTR_CO2(i,j,kLev) +#endif ENDDO ENDDO CALL CARBON_COEFFS( - I theta,salt, + I surftemp,surfsalt, I bi,bj,iMin,iMax,jMin,jMax,myThid) C==================================================================== @@ -133,16 +157,18 @@ IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN 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 surftemp(i,j),surfsalt(i,j), + I surfdic(i,j), 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 aksi(i,j,bi,bj),akf(i,j,bi,bj), + I ak0(i,j,bi,bj), fugf(i,j,bi,bj), + I 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), - I myThid ) + I i,j,kLev,bi,bj,myIter,myThid ) ELSE pCO2(i,j,bi,bj)=0. _d 0 ENDIF @@ -154,31 +180,45 @@ IF ( maskC(i,j,kLev,bi,bj).NE.0. _d 0 ) THEN C calculate SCHMIDT NO. for CO2 - SchmidtNoDIC(i,j) = - & sca1 + SchmidtNoDIC(i,j) = + & sca1 & + sca2 * theta(i,j,kLev,bi,bj) - & + sca3 * 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) + & + sca3 * 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) & *theta(i,j,kLev,bi,bj) +c make sure Schmidt number isn't negative (will happen if temp>39C) + SchmidtNoDIC(i,j)=max(1.0 _d -2, SchmidtNoDIC(i,j)) C Determine surface flux (FDIC) C first correct pCO2at for surface atmos pressure - pCO2sat(i,j) = + pCO2sat(i,j) = & AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj) C then account for Schmidt number Kwexch(i,j) = Kwexch_Pre(i,j,bi,bj) & / sqrt(SchmidtNoDIC(i,j)/660.0 _d 0) +#ifdef WATERVAP_BUG C Calculate flux in terms of DIC units using K0, solubility C Flux = Vp * ([CO2sat] - [CO2]) C CO2sat = K0*pCO2atmos*P/P0 C Converting pCO2 to [CO2] using ff, as in CALC_PCO2 - FluxCO2(i,j,bi,bj) = - & Kwexch(i,j)*( - & ak0(i,j,bi,bj)*pCO2sat(i,j) - - & ff(i,j,bi,bj)*pCO2(i,j,bi,bj) - & ) + FluxCO2(i,j,bi,bj) = + & Kwexch(i,j)*( + & ak0(i,j,bi,bj)*pCO2sat(i,j) - + & ff(i,j,bi,bj)*pCO2(i,j,bi,bj) + & ) +#else +C Corrected by Val Bennington Nov 2010 per G.A. McKinley's finding +C of error in application of water vapor correction +c Flux = kw*rho*(ff*pCO2atm-k0*FugFac*pCO2ocean) + FluxCO2(i,j,bi,bj) = + & Kwexch(i,j)*( + & ff(i,j,bi,bj)*pCO2sat(i,j) - + & pCO2(i,j,bi,bj)*fugf(i,j,bi,bj) + & *ak0(i,j,bi,bj) ) + & +#endif ELSE FluxCO2(i,j,bi,bj) = 0. _d 0 ENDIF @@ -206,11 +246,11 @@ ENDDO ENDDO -C update tendency +C update tendency DO j=jmin,jmax DO i=imin,imax GDC(i,j)= recip_drF(kLev)*recip_hFacC(i,j,kLev,bi,bj) - & *(FluxCO2(i,j,bi,bj) + & *(FluxCO2(i,j,bi,bj) #ifdef ALLOW_OLD_VIRTUALFLUX & + VirtualFlux(i,j) #endif