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C $Header: /u/gcmpack/MITgcm/pkg/dic/car_flux_omega_top.F,v 1.4 2007/10/09 00:01:42 jmc Exp $ |
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C $Name: $ |
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|
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#include "DIC_OPTIONS.h" |
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#include "GCHEM_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: CAR_FLUX |
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|
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C !INTERFACE: ========================================================== |
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SUBROUTINE CAR_FLUX_OMEGA_TOP( bioac, cflux, |
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I bi,bj,imin,imax,jmin,jmax, |
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I myIter,myTime,myThid) |
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|
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C !DESCRIPTION: |
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C Calculate carbonate fluxes |
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C HERE ONLY HAVE DISSOLUTION WHEN OMEGA < 1.0 |
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C Karsten Friis and Mick Follows Sep 2004 |
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|
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C !USES: =============================================================== |
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IMPLICIT NONE |
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#include "SIZE.h" |
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#include "DYNVARS.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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#include "DIC_BIOTIC.h" |
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|
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C !INPUT PARAMETERS: =================================================== |
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C myThid :: thread number |
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C myIter :: current timestep |
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C myTime :: current time |
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C bioac :: biological productivity |
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INTEGER myIter |
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_RL myTime |
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INTEGER myThid |
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_RL bioac(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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INTEGER imin, imax, jmin, jmax, bi, bj |
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|
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C !OUTPUT PARAMETERS: =================================================== |
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C cflux :: carbonate flux |
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_RL cflux(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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|
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#ifdef ALLOW_PTRACERS |
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#ifdef DIC_BIOTIC |
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|
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C !LOCAL VARIABLES: ==================================================== |
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C i,j,k :: loop indices |
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c ko :: loop-within-loop index |
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c caexport :: flux of carbonate from base each "productive" |
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c layer |
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c depth_u, depth_l :: depths of upper and lower interfaces |
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c flux_u, flux_l :: flux through upper and lower interfaces |
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_RL caexport(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER I,J,k, ko |
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_RL flux_u, flux_l |
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c variables for calcium carbonate dissolution |
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_RL KierRate |
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_RL DissolutionRate |
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_RL WsinkPIC |
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INTEGER iflx |
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_RL dumrate |
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|
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c diagnostics |
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c _RL exp_tot |
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c _RL flx_tot |
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c integer knum |
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c _RL omeg_bot |
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c _RL tmp |
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|
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|
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CEOP |
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|
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c flag to either remineralize in bottom or top layer if flux |
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c reaches bottom layer 0=bottom, 1=top |
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iflx=1 |
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c set some nominal particulate sinking rate |
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c try 100m/day |
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WsinkPIC = 100/86400.0 |
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c calculate carbonate flux from base of each nlev |
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DO j=jmin,jmax |
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DO i=imin,imax |
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c exp_tot=0 |
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do k=1,nR |
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cflux(i,j,k)=0.d0 |
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enddo |
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DO k=1,nLev |
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if (hFacC(i,j,k,bi,bj).gt.0.d0) then |
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caexport(i,j)= R_CP*rain_ratio(i,j,bi,bj)*bioac(i,j,k)* |
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& (1.0-DOPfraction)*drF(k)*hFacC(i,j,k,bi,bj) |
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c exp_tot=exp_tot+caexport(i,j) |
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c calculate flux to each layer from base of k |
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Do ko=k+1,Nr |
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if (hFacC(i,j,ko,bi,bj).gt.0.d0) then |
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if (ko .eq. k+1) then |
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flux_u = caexport(i,j) |
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else |
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flux_u = flux_l |
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endif |
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|
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|
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|
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C flux through lower face of cell |
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if (omegaC(i,j,ko,bi,bj) .gt. 1.0) then |
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flux_l = flux_u |
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|
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c if at bottom, remineralize remaining flux |
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if (ko.eq.Nr.or.hFacC(i,j,ko+1,bi,bj).eq.0.d0) then |
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if (iflx.eq.1) then |
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c ... at surface |
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cflux(i,j,1)=cflux(i,j,1)+ |
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& ( (flux_l)/(drF(1)*hFacC(i,j,1,bi,bj)) ) |
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else |
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|
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c ... at bottom |
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flux_l=0.d0 |
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endif |
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endif |
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else |
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c if dissolution, then use rate from Kier (1980) Geochem. Cosmochem. Acta |
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c Kiers dissolution rate in % per day |
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KierRate = 7.177* ((1.0-omegaC(i,j,ko,bi,bj))**4.54) |
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c convert to per s |
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c Karsten finds Kier value not in 0/0 after all... therefore drop 100 factor |
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c DissolutionRate = KierRate/(100.0*86400.0) |
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DissolutionRate = KierRate/(86400.0) |
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c flux_l = flux_u*(1.0-DissolutionRate*drF(k)/WsinkPIC) |
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c Karstens version |
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c - gives NaNs (because using kierrate, not dissolution rate)??? |
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c flux_l = flux_u*(1.0-KierRate)**(drF(k)/WsinkPIC) |
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c MICKS NEW VERSION... based on vertical sinking/remin balance |
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dumrate = -1.0d0*DissolutionRate*drF(ko)* |
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& hFacC(i,j,ko,bi,bj)/WsinkPIC |
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flux_l = flux_u*exp(dumrate) |
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c TEST ............................ |
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c if(i .eq. 76 .and. j .eq. 36)then |
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c write(6,*)'k,flux_l/flux_u',ko,(flux_l/flux_u) |
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c write(6,*)'K, KierRate, drF(k), drF(ko), WsinkPIC,OmegaC' |
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c write(6,*)ko,KierRate,drF(k),drF(ko),WsinkPIC, |
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c & omegaC(i,j,ko,bi,bj) |
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c endif |
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c TEST ............................ |
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c no flux to ocean bottom |
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if (ko.eq.Nr.or.hFacC(i,j,ko+1,bi,bj).eq.0.d0) |
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& flux_l=0.d0 |
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endif |
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|
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c flux divergence |
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cflux(i,j,ko)=cflux(i,j,ko) + |
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& ( (flux_u-flux_l)/(drF(ko)*hFacC(i,j,ko,bi,bj)) ) |
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c TEST ............................ |
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c if(i .eq. 76 .and. j .eq. 36)then |
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c write(6,*)'k,flux_l/flux_u',ko,(flux_l/flux_u) |
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c write(6,*)'k,flux_l,cflux ',ko,flux_l,cflux(i,j,ko) |
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c endif |
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c TEST ............................ |
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else |
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c if no layer below initial layer, remineralize |
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if (ko.eq.k+1) then |
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if (iflx.eq.1.and.omegaC(i,j,k,bi,bj) .gt. 1.d0) then |
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c ... at surface |
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cflux(i,j,1)=cflux(i,j,1) |
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& +bioac(i,j,k)*(1.0-DOPfraction)* |
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& R_CP*rain_ratio(i,j,bi,bj) |
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& *drF(k)*hFacC(i,j,k,bi,bj)/ |
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& (drF(1)*hFacC(i,j,1,bi,bj) ) |
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else |
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c ... at bottom |
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cflux(i,j,k)=cflux(i,j,k) |
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& +bioac(i,j,k)*(1.0-DOPfraction)* |
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& R_CP*rain_ratio(i,j,bi,bj) |
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endif |
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endif |
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endif |
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ENDDO |
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|
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endif |
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ENDDO |
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c diagnostic |
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c flx_tot=0 |
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c k=0 |
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c do k=1,nR |
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c flx_tot=flx_tot+cflux(i,j,k)*drF(k)*hFacC(i,j,k,bi,bj) |
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c if (hFacC(i,j,k,bi,bj).gt.0) then |
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c knum=k |
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c omeg_bot=omegaC(i,j,k,bi,bj) |
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c endif |
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c enddo |
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c if (hFacC(i,j,k,bi,bj).gt.0) then |
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c tmp=abs(exp_tot-flx_tot) |
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c if (tmp>1e-20) then |
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c print*,'QQ car_flux', knum, |
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c & omeg_bot, exp_tot, flx_tot, exp_tot-flx_tot |
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c endif |
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c endif |
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c end diagnostic |
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ENDDO |
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ENDDO |
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c |
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#endif |
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#endif |
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RETURN |
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END |
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