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C $Header: /u/gcmpack/MITgcm/model/src/plumefrac.F,v 1.00 2007/09/13 16:41:00 atn Exp $ |
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C $Name: $ |
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_OPTIONS.h" |
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CBOP |
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C !ROUTINE: PLUMEFRAC |
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C !INTERFACE: |
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SUBROUTINE PLUMEFRAC( |
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I imax, fact,SPDepth, |
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U plumek, |
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I myTime, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE PLUMEFRAC |
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C | o Compute saltplume penetration. |
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C *==========================================================* |
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C | Compute fraction of saltplume (flux) penetrating to |
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C | specified depth, plumek, due to rejected salt |
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C | during freezing. |
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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 | PLUMEFRAC will report plumek = 4/5 on output if the input |
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C | plumek = 1. Else, output plumek = 0. |
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C | Reference : Duffy et al, (GRL 1999) |
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C | |
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C | |
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C | ===== |
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C | Written by : ATN (based on SWFRAC) |
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C | Date : Sep 13, 2007 |
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C *==========================================================* |
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C \ev |
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C !USES: |
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IMPLICIT NONE |
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C !INPUT/OUTPUT PARAMETERS: |
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C === Routine arguments === |
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C input arguments |
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C imax :: number of vertical grid points |
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C fact :: scale factor to apply to depth array |
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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 imax |
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_RL fact |
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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 plumek :: on input: vertical depth for desired plume fraction |
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C (fact*plumek) is negative distance (m) from surface |
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C plumek :: on output: saltplume contribution fraction |
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_RL plumek(imax), SPDepth(imax) |
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C !LOCAL VARIABLES: |
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C === Local variables === |
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_RL facz |
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INTEGER i |
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_RL tinee |
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parameter( tinee = 1.e-1) |
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#ifdef ALLOW_CAL |
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LOGICAL first, changed |
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INTEGER count0, count1 |
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#endif /* ALLOW_CAL */ |
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CEOP |
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#ifdef ALLOW_CAL |
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ceh3 this should have an IF ( useCALENDAR ) THEN |
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CML( |
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C myIter = 0 makes cal_getMonthsRec always return count0=12 |
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C so that jerl(count0) = 2. |
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C The following lines are meant to be an example of how to |
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C include time dependent water types. However, it would probably |
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C make more sense to first think about a regionally varying |
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C water type before implementing a time dependence. |
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CML CALL cal_GetMonthsRec( |
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CML O fac, first, changed, count0, count1, |
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CML I myTime, myIter, myThid ) |
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CML jwtype=jerl(count0) |
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CML) |
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#else /* ALLOW_CAL undef */ |
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#endif /* ALLOW_CAL */ |
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DO i = 1,imax |
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facz = abs(fact*plumek(i)) |
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IF (SPDepth(i).GT.facz .AND. SPDepth(i).GT.tinee) THEN |
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!plumek(i) = min(plumedk(i),SPDepth(i)+facz)/SPDepth(i) |
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plumek(i) = 1.0 - min(1.0,facz/abs(SPDepth(i))) |
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ELSE |
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plumek(i) = 0. |
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ENDIF |
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ENDDO |
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RETURN |
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END |
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