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C $Header: /u/gcmpack/MITgcm/verification/tutorial_global_oce_latlon/code/ptracers_forcing_surf.F,v 1.2 2007/05/14 19:48:36 dfer Exp $ |
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jmc |
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C $Name: $ |
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#include "PTRACERS_OPTIONS.h" |
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CBOP |
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C !ROUTINE: PTRACERS_FORCING_SURF |
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C !INTERFACE: ========================================================== |
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SUBROUTINE PTRACERS_FORCING_SURF( |
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I bi, bj, iMin, iMax, jMin, jMax, |
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I myTime,myIter,myThid ) |
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C !DESCRIPTION: |
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C Precomputes surface forcing term for pkg/ptracers. |
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C Precomputation is needed because of non-local KPP transport term, |
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C routine KPP_TRANSPORT_PTR. |
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C !USES: =============================================================== |
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IMPLICIT NONE |
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#include "SIZE.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 "SURFACE.h" |
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#include "FFIELDS.h" |
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c #include "DYNVARS.h" |
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#include "PTRACERS_SIZE.h" |
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#include "PTRACERS.h" |
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C !INPUT PARAMETERS: =================================================== |
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C bi,bj :: tile indices |
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C myTime :: model time |
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C myIter :: time-step number |
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C myThid :: thread number |
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INTEGER bi, bj, iMin, iMax, jMin, jMax |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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#ifdef ALLOW_PTRACERS |
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C !LOCAL VARIABLES: ==================================================== |
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C i,j :: loop indices |
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C iTrc :: tracer index |
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C ks :: surface level index |
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INTEGER i, j |
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INTEGER iTrc, ks |
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CEOP |
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IF ( usingPCoords ) THEN |
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ks = Nr |
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ELSE |
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ks = 1 |
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ENDIF |
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C Example of how to add forcing at the surface |
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DO iTrc=1,PTRACERS_numInUse |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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dfer |
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C Restoring to zero at the surface on a 10-day timescale |
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surfaceForcingPtr(i,j,bi,bj,iTrc) = |
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& + 1. _d 0 / (10. _d 0 * 86400. _d 0) |
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& * ( 0. _d 0 - pTracer(i,j,ks,bi,bj,iTrc) ) |
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dfer |
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& * drF(ks) * _hFacC(i,j,ks,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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#ifdef EXACT_CONSERV |
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IF ( (nonlinFreeSurf.GT.0 .OR. usingPCoords) |
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& .AND. useRealFreshWaterFlux ) THEN |
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DO iTrc=1,PTRACERS_numInUse |
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c- NonLin_FrSurf and RealFreshWaterFlux : PmEpR effectively changes |
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c the water column height ; temp., salt, (tracer) flux associated |
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c with this input/output of water is added here to the surface tendency. |
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c |
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IF (PtRACERS_EvPrRn(iTrc).NE.UNSET_RL) THEN |
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DO j = jMin, jMax |
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DO i = iMin, iMax |
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surfaceForcingPtr(i,j,bi,bj,iTrc) = |
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& surfaceForcingPtr(i,j,bi,bj,iTrc) |
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& + PmEpR(i,j,bi,bj) |
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& *( PTRACERS_EvPrRn(iTrc) - pTracer(i,j,ks,bi,bj,iTrc) ) |
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& *mass2rUnit |
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ENDDO |
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ENDDO |
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ENDIF |
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ENDDO |
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ENDIF |
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#endif /* EXACT_CONSERV */ |
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#endif /* ALLOW_PTRACERS */ |
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RETURN |
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END |
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