--- MITgcm/pkg/dic/dic_surfforcing.F 2003/10/02 18:30:07 1.2.2.1 +++ MITgcm/pkg/dic/dic_surfforcing.F 2005/08/25 22:32:44 1.9 @@ -1,20 +1,24 @@ +C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/dic/dic_surfforcing.F,v 1.9 2005/08/25 22:32:44 stephd Exp $ +C $Name: $ + #include "DIC_OPTIONS.h" #include "PTRACERS_OPTIONS.h" #include "GCHEM_OPTIONS.h" -CStartOfInterFace +CBOP +C !ROUTINE: DIC_SURFFORCING + +C !INTERFACE: ========================================================== SUBROUTINE DIC_SURFFORCING( PTR_CO2 , GDC, I bi,bj,imin,imax,jmin,jmax, I myIter,myTime,myThid) -C /==========================================================\ -C | SUBROUTINE DIC_SURFFORCING | -C | o Calculate the carbon air-sea flux terms | -C | o following external_forcing_dic.F from Mick | -C |==========================================================| - IMPLICIT NONE +C !DESCRIPTION: +C Calculate the carbon air-sea flux terms +C following external_forcing_dic.F (OCMIP run) from Mick -C == GLobal variables == +C !USES: =============================================================== + IMPLICIT NONE #include "SIZE.h" #include "DYNVARS.h" #include "EEPARAMS.h" @@ -23,24 +27,29 @@ #include "FFIELDS.h" #include "DIC_ABIOTIC.h" #ifdef DIC_BIOTIC +#include "PTRACERS_SIZE.h" #include "PTRACERS.h" #endif -C == Routine arguments == +C !INPUT PARAMETERS: =================================================== +C myThid :: thread number +C myIter :: current timestep +C myTime :: current time +c PTR_CO2 :: DIC tracer field INTEGER myIter, myThid _RL myTime _RL PTR_CO2(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) - _RL GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) INTEGER iMin,iMax,jMin,jMax, bi, bj +C !OUTPUT PARAMETERS: =================================================== +c GDC :: tendency due to air-sea exchange + _RL GDC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) + #ifdef ALLOW_PTRACERS -#ifdef DIC_ABIOTIC -C == Local variables == + +C !LOCAL VARIABLES: ==================================================== INTEGER I,J, kLev, it C Number of iterations for pCO2 solvers... - INTEGER inewtonmax - INTEGER ibrackmax - INTEGER donewt C Solubility relation coefficients _RL SchmidtNoDIC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL pCO2sat(1-OLx:sNx+OLx,1-OLy:sNy+OLy) @@ -50,6 +59,7 @@ _RL surfphos(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL surfsi(1-OLx:sNx+OLx,1-OLy:sNy+OLy) _RL VirtualFlux(1-OLx:sNx+OLx,1-OLy:sNy+OLy) +CEOP cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc @@ -80,7 +90,7 @@ surfphos(i,j) = 5.1225e-4 * maskC(i,j,kLev,bi,bj) #endif C FOR NON-INTERACTIVE Si - surfsi(i,j) = 7.6838e-3 * maskC(i,j,kLev,bi,bj) + surfsi(i,j) = SILICA(i,j,bi,bj) * maskC(i,j,kLev,bi,bj) ENDDO ENDDO @@ -89,61 +99,13 @@ I bi,bj,iMin,iMax,jMin,jMax) C==================================================================== -#define PH_APPROX -c set number of iterations for [H+] solvers -#ifdef PH_APPROX - inewtonmax = 1 -#else - inewtonmax = 10 -#endif - ibrackmax = 30 -C determine pCO2 in surface ocean -C set guess of pH for first step here -C IF first step THEN use bracket-bisection for first step, -C and determine carbon coefficients for safety -C ELSE use newton-raphson with previous H+(x,y) as first guess - - donewt=1 - -c for first few timesteps - IF(myIter .le. (nIter0+inewtonmax) )then - donewt=0 - DO j=1-OLy,sNy+OLy - DO i=1-OLx,sNx+OLx - pH(i,j,bi,bj) = 8.0 - ENDDO - ENDDO -#ifdef PH_APPROX - print*,'QQ: pCO2 approximation method' -c first approxmation - DO j=1-OLy,sNy+OLy - DO i=1-OLx,sNx+OLx - do it=1,10 - 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 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 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) ) - enddo - ENDDO - ENDDO -#else - print*,'QQ: pCO2 full method' -#endif - ENDIF - - c pCO2 solver... +C$TAF LOOP = parallel DO j=1-OLy,sNy+OLy +C$TAF LOOP = parallel DO i=1-OLx,sNx+OLx IF(maskC(i,j,kLev,bi,bj) .NE. 0.)THEN -#ifdef PH_APPROX 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), @@ -154,18 +116,6 @@ I aksi(i,j,bi,bj),akf(i,j,bi,bj),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) ) -#else - CALL CALC_PCO2(donewt,inewtonmax,ibrackmax, - I theta(i,j,kLev,bi,bj),salt(i,j,kLev,bi,bj), - I PTR_CO2(i,j,kLev), 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 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) ) -#endif ELSE pCO2(i,j,bi,bj)=0. _d 0 END IF @@ -196,7 +146,7 @@ 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) + Kwexch(i,j) =(1.d0-Fice(i,j,bi,bj))*Kwexch(i,j) C Calculate flux in terms of DIC units using K0, solubility @@ -222,7 +172,7 @@ 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 @@ -236,14 +186,13 @@ 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) + GDC(i,j)= maskC(i,j,kLev,bi,bj)*recip_drF(kLev)* + & recip_hFacC(i,j,kLev,bi,bj)*( + & FluxCO2(i,j,bi,bj) + VirtualFlux(i,j) & ) ENDDO ENDDO #endif -#endif RETURN END