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C $Header: /usr/local/gcmpack/MITgcm_contrib/ocean_inversion_project/code/ptracers_forcing_surf.F,v 1.1 2003/09/24 04:52:38 dimitri Exp $ |
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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 |
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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 This file is customized to compute CO2 perturbations from |
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C 30 ocean regions for Gruber's ocean inversion project. |
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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 "PTRACERS.h" |
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#include "PARAMS.h" |
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#include "FFIELDS.h" |
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#include "DYNVARS.h" |
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#include "GRID.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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INTEGER i, j, iTracer |
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integer fldstartdate(4), mydate(4), difftime(4) |
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integer count0, count1 |
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_RL repeatPeriod, fldperiod, fac, fldsecs, fldsecs0, fldsecs1 |
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CEOP |
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C Compute time interpolation indices and factors. |
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C It is assumed that each year is 365.25 days (31557600 s) |
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C long and that each month is 2629800 s. |
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repeatPeriod = 31557600 |
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fldperiod = 2629800 |
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C fldstartdate is January 15, 1765, 5:15am |
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fldstartdate(1) = 17650115 |
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fldstartdate(2) = 51500 |
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fldstartdate(3) = 1 |
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fldstartdate(4) = 5 |
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C Determine offset in seconds from beginning of input data |
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C to current date. |
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call cal_GetDate( myiter, mytime, mydate, mythid ) |
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call cal_TimePassed( fldstartdate, mydate, difftime, mythid ) |
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call cal_ToSeconds( difftime, fldsecs, mythid ) |
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C Determine the flux records just before and after mycurrentdate. |
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do while ( fldsecs .lt. 0 ) |
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fldsecs = fldsecs + repeatPeriod |
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enddo |
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fldsecs0 = mod(fldsecs,repeatPeriod) |
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count0 = int((fldsecs0+0.5)/fldperiod) + 1 |
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fldsecs1 = mod(fldsecs+fldperiod,repeatPeriod) |
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count1 = int((fldsecs1+0.5)/fldperiod) + 1 |
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fldsecs = fldsecs0-int((fldsecs0+0.5)/fldperiod)*fldperiod |
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C Weight belonging to irec for linear interpolation purposes. |
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C Note: The weight as chosen here is 1. - fac of the "old" |
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C MITgcm's estimation program. |
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fac = 1. - fldsecs/fldperiod |
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DO iTracer=1,PTRACERS_numInUse |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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surfaceTendencyPtr(i,j,bi,bj,iTracer) = |
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& pTracerMasks(i,j,iTracer,bi,bj) * ( |
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& pTracerTakahashi(I,J,count0,bi,bj) * fac + |
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& pTracerTakahashi(I,J,count1,bi,bj) * (1-fac) ) * |
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& recip_drF(1) * recip_hFacC(i,j,1,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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#endif /* ALLOW_PTRACERS */ |
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RETURN |
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END |
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