--- MITgcm/pkg/dic/dic_surfforcing.F 2004/07/13 18:03:31 1.6 +++ MITgcm/pkg/dic/dic_surfforcing.F 2007/08/28 02:30:31 1.17 @@ -1,4 +1,4 @@ -C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/dic/dic_surfforcing.F,v 1.6 2004/07/13 18:03:31 jmc Exp $ +C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/dic/dic_surfforcing.F,v 1.17 2007/08/28 02:30:31 dfer Exp $ C $Name: $ #include "DIC_OPTIONS.h" @@ -9,7 +9,7 @@ C !ROUTINE: DIC_SURFFORCING C !INTERFACE: ========================================================== - SUBROUTINE DIC_SURFFORCING( PTR_CO2 , GDC, + SUBROUTINE DIC_SURFFORCING( PTR_CO2 , PTR_ALK, PTR_PO4, GDC, I bi,bj,imin,imax,jmin,jmax, I myIter,myTime,myThid) @@ -26,10 +26,6 @@ #include "GRID.h" #include "FFIELDS.h" #include "DIC_ABIOTIC.h" -#ifdef DIC_BIOTIC -#include "PTRACERS_SIZE.h" -#include "PTRACERS.h" -#endif C !INPUT PARAMETERS: =================================================== C myThid :: thread number @@ -39,10 +35,12 @@ INTEGER myIter, myThid _RL myTime _RL PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) + _RL PTR_ALK(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) + _RL PTR_PO4(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) INTEGER iMin,iMax,jMin,jMax, bi, bj C !OUTPUT PARAMETERS: =================================================== -c GDC :: tendency term due to air-sea exchange +c GDC :: tendency due to air-sea exchange _RL GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) #ifdef ALLOW_PTRACERS @@ -54,40 +52,47 @@ _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL Kwexch(1-OLx:sNx+OLx,1-OLy:sNy+OLy) + _RL pisvel(1-OLx:sNx+OLx,1-OLy:sNy+OLy) C local variables for carbon chem _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) +#ifdef ALLOW_OLD_VIRTUALFLUX _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy) +#endif CEOP cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc kLev=1 +c if coupled to atmsopheric model, use the +c Co2 value passed from the coupler +#ifndef USE_ATMOSCO2 C PRE-INDUSTRIAL STEADY STATE pCO2 = 278.0 ppmv DO j=1-OLy,sNy+OLy DO i=1-OLx,sNx+OLx - AtmospCO2(i,j,bi,bj)=278.0d-6 + AtmospCO2(i,j,bi,bj)=278.0 _d -6 ENDDO ENDDO +#endif C ================================================================= C determine inorganic carbon chem coefficients - DO j=1-OLy,sNy+OLy - DO i=1-OLx,sNx+OLx + DO j=jmin,jmax + DO i=imin,imax #ifdef DIC_BIOTIC cQQQQ check ptracer numbers - surfalk(i,j) = PTRACER(i,j,klev,bi,bj,2) + surfalk(i,j) = PTR_ALK(i,j,klev) & * maskC(i,j,kLev,bi,bj) - surfphos(i,j) = PTRACER(i,j,klev,bi,bj,3) + surfphos(i,j) = PTR_PO4(i,j,klev) & * maskC(i,j,kLev,bi,bj) #else - surfalk(i,j) = 2.366595 * salt(i,j,kLev,bi,bj)/gsm_s + surfalk(i,j) = 2.366595 _d 0 * salt(i,j,kLev,bi,bj)/gsm_s & * maskC(i,j,kLev,bi,bj) - surfphos(i,j) = 5.1225e-4 * maskC(i,j,kLev,bi,bj) + surfphos(i,j) = 5.1225 _d -4 * maskC(i,j,kLev,bi,bj) #endif C FOR NON-INTERACTIVE Si surfsi(i,j) = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj) @@ -99,11 +104,33 @@ I bi,bj,iMin,iMax,jMin,jMax) C==================================================================== + DO j=jmin,jmax + DO i=imin,imax +C Compute AtmosP and Kwexch_Pre which are re-used for flux of O2 + +#ifdef USE_PLOAD +C Convert anomalous pressure pLoad (in Pa) from atmospheric model +C to total pressure (in Atm) +C Note: it is assumed the reference atmospheric pressure is 1Atm=1013mb +C rather than the actual ref. pressure from Atm. model so that on +C average AtmosP is about 1 Atm. + AtmosP(i,j,bi,bj)= 1. _d 0 + pLoad(i,j,bi,bj)/Pa2Atm +#endif + +C Pre-compute part of exchange coefficient: pisvel*(1-fice) +C Schmidt number is accounted for later + pisvel(i,j)=0.337 _d 0 *wind(i,j,bi,bj)**2/3.6 _d 5 + Kwexch_Pre(i,j,bi,bj) = pisvel(i,j) + & * (1. _d 0 - FIce(i,j,bi,bj)) + + ENDDO + ENDDO + c pCO2 solver... C$TAF LOOP = parallel - DO j=1-OLy,sNy+OLy + DO j=jmin,jmax C$TAF LOOP = parallel - DO i=1-OLx,sNx+OLx + DO i=imin,imax IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN CALL CALC_PCO2_APPROX( @@ -122,8 +149,8 @@ ENDDO ENDDO - DO j=1-OLy,sNy+OLy - DO i=1-OLx,sNx+OLx + DO j=jmin,jmax + DO i=imin,imax IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN C calculate SCHMIDT NO. for CO2 @@ -138,32 +165,27 @@ C first correct pCO2at for surface atmos pressure pCO2sat(i,j) = & AtmosP(i,j,bi,bj)*AtmospCO2(i,j,bi,bj) -c find exchange coefficient -c account for schmidt number and and varible piston velocity - Kwexch(i,j) = - & pisvel(i,j,bi,bj) - & / sqrt(SchmidtNoDIC(i,j)/660.0) -c OR use a constant coeff -c Kwexch(i,j) = 5e-5 -c ice influence -cQQ Kwexch(i,j) =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j) +C then account for Schmidt number + Kwexch(i,j) = Kwexch_Pre(i,j,bi,bj) + & / sqrt(SchmidtNoDIC(i,j)/660.0 _d 0) 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) = - & maskC(i,j,kLev,bi,bj)*Kwexch(i,j)*( + & Kwexch(i,j)*( & ak0(i,j,bi,bj)*pCO2sat(i,j) - & ff(i,j,bi,bj)*pCO2(i,j,bi,bj) & ) ELSE - FluxCO2(i,j,bi,bj) = 0. + FluxCO2(i,j,bi,bj) = 0. _d 0 ENDIF C convert flux (mol kg-1 m s-1) to (mol m-2 s-1) FluxCO2(i,j,bi,bj) = FluxCO2(i,j,bi,bj)/permil +#ifdef ALLOW_OLD_VIRTUALFLUX IF (maskC(i,j,kLev,bi,bj).NE.0.) THEN c calculate virtual flux c EminusPforV = dS/dt*(1/Sglob) @@ -172,7 +194,7 @@ C in salinity. Thus, also increase in other surface tracers C (i.e. positive virtual flux into surface layer) C ...so here, VirtualFLux = dC/dt! - VirtualFlux(i,j)=gsm_DIC*surfaceTendencyS(i,j,bi,bj)/gsm_s + VirtualFlux(i,j)=gsm_DIC*surfaceForcingS(i,j,bi,bj)/gsm_s c OR c let virtual flux be zero c VirtualFlux(i,j)=0.d0 @@ -180,16 +202,19 @@ ELSE VirtualFlux(i,j)=0. _d 0 ENDIF +#endif /* ALLOW_OLD_VIRTUALFLUX */ ENDDO ENDDO C update tendency - DO j=1-OLy,sNy+OLy - DO i=1-OLx,sNx+OLx - GDC(i,j)= maskC(i,j,kLev,bi,bj)*( - & FluxCO2(i,j,bi,bj)*recip_drF(kLev) - & + VirtualFlux(i,j) - & ) + 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) +#ifdef ALLOW_OLD_VIRTUALFLUX + & + VirtualFlux(i,j) +#endif + & ) ENDDO ENDDO