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C $Header: /u/gcmpack/MITgcm/pkg/salt_plume/salt_plume_volfrac.F,v 1.1 2014/05/21 10:52:21 heimbach Exp $ |
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C $Name: $ |
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|
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#include "SALT_PLUME_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: SALT_PLUME_VOLFRAC |
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C !INTERFACE: |
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SUBROUTINE SALT_PLUME_VOLFRAC( |
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I bi, bj, myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE SALT_PLUME_VOLFRAC |
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C | o Compute saltplume penetration. |
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C *==========================================================* |
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C | Compute fraction of volume flux associated with saltplume |
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C | flux penetrating through the entire water columns due to |
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C | rejected salt during freezing. |
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C | |
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C | For example, if surface value is Saltplume0, |
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C | and each level gets equal fraction 1/5 down to SPDepth=5, |
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C | SALT_PLUME_VOLFRAC will report |
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C | dSPvolkLev2Above[2to1,3to2,4to3,5to4,6to5] = [4/5,3/5,2/5,1/5, 0] |
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C | dSPvolSurf2kLev [1to1,1to2,1to3,1to4,1to5] = [1/5,1/5,1/5,1/5,1/5] |
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C | sum [into5] = 1to5 + 6to5 - 5to4 = 1/5 + 0 - 1/5 = 0 |
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C | [into4] = 1to4 + 5to4 - 4to3 = 1/5 + 1/5 - 2/5 = 0 |
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C | [into3] = 1to3 + 4to3 - 3to2 = 1/5 + 2/5 - 3/5 = 0 |
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C | [into2] = 1to2 + 3to2 - 2to1 = 1/5 + 3/5 - 4/5 = 0 |
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C | [into1] = 1to1 + 2to1 - 1to[1,2,3,4,5] = 1/5 + 4/5 - 5/5 = 0 |
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C | NOTE: volume will always be conserved. |
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C | ===== |
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C | Written by : ATN (based on SALT_PLUME_FRAC) |
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C | Date : Apr 14, 2014 |
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C *==========================================================* |
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C \ev |
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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 "GRID.h" |
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#include "SALT_PLUME.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C input arguments |
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C SPDpeth :: corresponding SaltPlumeDepth(i,j) at this grid point |
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C myTime :: Current time in simulation |
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C myIter :: Current iteration number in simulation |
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C myThid :: My Thread Id. number |
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INTEGER bi,bj |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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C input/output arguments |
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C CHARACTER*(MAX_LEN_MBUF) msgBuf |
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CEOP |
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|
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#ifdef ALLOW_SALT_PLUME |
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#ifdef SALT_PLUME_VOLUME |
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|
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C !LOCAL VARIABLES: |
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_RL dMbdt (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL temp (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL dplumek |
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INTEGER SPkBottom (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER i,j,k,kp1,Nlev,Nrp1 |
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INTEGER imt |
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parameter( imt=(sNx+2*OLx)*(sNy+2*OLy) ) |
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|
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C initialize at every time step |
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Nrp1=Nr+1 |
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DO k=1,Nr |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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dSPvolSurf2kLev(i,j,k,bi,bj) = 0. _d 0 |
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dSPvolkLev2Above(i,j,k,bi,bj) = 0. _d 0 |
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SPplumek(i,j,k,bi,bj) = 1. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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SPplumek(i,j,Nrp1,bi,bj) = 1. _d 0 |
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SPbrineVolFlux(i,j,bi,bj) = 0. _d 0 |
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SPkBottom(i,j) = 0 |
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ENDDO |
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ENDDO |
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|
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C call salt_plume_frac to fill in SPplumek and SPkBottom |
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C use dMbdt+temp as a temporary arrays here to save memory: |
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DO k = Nrp1,1,-1 |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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temp(i,j)=SaltPlumeDepth(i,j,bi,bj) |
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dMbdt(i,j)=abs(rF(k)) |
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ENDDO |
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ENDDO |
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CALL SALT_PLUME_FRAC( |
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I imt,oneRS,temp, |
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#ifdef SALT_PLUME_SPLIT_BASIN |
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I XC(1-Olx,1-Oly,bi,bj),YC(1-Olx,1-Oly,bi,bj), |
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#endif |
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U dMbdt, |
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I myTime, 1, myThid ) |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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SPplumek(i,j,k,bi,bj)=dMbdt(i,j) |
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IF(SPplumek(i,j,k,bi,bj).GT. 0.9999999) THEN |
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SPkBottom(i,j)=k |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C reinitialize dMbdt = 0 |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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dMbdt(i,j)=0. _d 0 |
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ENDDO |
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ENDDO |
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|
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C Now calculating dplumek, dSPvolumeUp, dSPvolSurf2kLev |
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C units: |
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C Sbrine=dsb/dt*dt/(rhoConst*SPalpha*drF)[psu kg/m2/s*s/(kg/m3*m)]=[psu] |
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C SPplumek : fraction : unitless |
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C SaltPlumeFlux: dsb/dt [psu.kg/m^2/s = g/m^2/s] |
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C brine_mass_flux dMb/dt = dsb/dt / Sbrine [kg/m2/s] |
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C = dsb/dt / (dsb/dt*dt/(rhoConst*SPalpha*drF)) |
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C = rhoConst*SPalpha*drF/dt [kg/m3 m/s]=[kg/m2/s] |
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C dVbrine/dt = dMb/dt 1/rhoConst [m/s] |
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|
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C has 2 ways to define brine properties: either provide |
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C (A) SPalpha: vol frac or (B) SPbrineSalt: brine salinity. |
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C (A) SPalpha: can calc SPbrineSalt as fxn of dhice/dt, |
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C constrained by SPbrineSaltmax: |
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C SPbrineSalt=SaltPlumeFlux/rhoConst/SPalpha/drF(1)*dt |
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C SPbrineSalt=min(SPbrineSalt,SPbrineSaltmax) |
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C dMbdt = saltPlumeFlux / SPbrineSalt |
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C = rhoConst*SPalpha*drF(1)/dt <-- a function of SPalpha |
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C (B) SPbrinesalt provided |
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C dMbdt = saltPlumeFlux / SPbrineSalt <-- fxn of SPbrineSalt |
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|
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C Assuming we go with (B) here: |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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C brine mass and volume at surface: |
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dMbdt(i,j)=saltPlumeFlux(i,j,bi,bj)/SPbrineSconst |
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SPbrineVolFlux(i,j,bi,bj)=dMbdt(i,j)*mass2rUnit |
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ENDDO |
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ENDDO |
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|
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C Distributing down: this is always from level 1 to depth |
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DO k=Nr,1,-1 |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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dplumek=SPplumek(i,j,k+1,bi,bj)-SPplumek(i,j,k,bi,bj) |
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dSPvolSurf2kLev(i,j,k,bi,bj)=dplumek*SPbrineVolFlux(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C Now volume up: need to scan from bottom of SPDepth |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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Nlev=SPkBottom(i,j) |
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IF(Nlev.GE.1 .AND. Nlev.LE.Nr) THEN |
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DO k=Nlev,1,-1 |
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kp1=k+1 |
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dSPvolkLev2Above(i,j,k,bi,bj)=dSPvolkLev2Above(i,j,kp1,bi,bj) |
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& - dSPvolSurf2kLev(i,j,k,bi,bj) |
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ENDDO |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_DIAGNOSTICS |
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IF ( useDiagnostics ) THEN |
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CALL DIAGNOSTICS_FILL( |
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& SPplumek,'PLUMEKB1',0,Nr,1,bi,bj,myThid ) |
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ENDIF |
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#endif /* ALLOW_DIAGNOSTICS */ |
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|
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#endif /* SALT_PLUME_VOLUME */ |
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#endif /* ALLOW_SALT_PLUME */ |
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|
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RETURN |
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END |
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