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C $Header: /u/gcmpack/MITgcm/model/src/convective_weights.F,v 1.3 2002/08/15 17:25:31 adcroft Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: CONVECTIVE_WEIGHTS |
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C !INTERFACE: |
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SUBROUTINE CONVECTIVE_WEIGHTS( |
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I bi,bj,k,rhoKm1,rhoK, |
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O weightA,weightB,ConvectCount, |
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I myThid) |
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C !DESCRIPTION: |
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C Calculates the weights used to represent convective mixing |
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C between two layers. |
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C |
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C Mixing is represented by: |
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C T(k-1) = T(k-1) + B * ( T(k) - T(k-1) ) |
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C T(k) = T(k) + A * ( T(k-1) - T(k) ) |
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C |
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C In the stable case, A = B = 0 |
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C In the unstable case, A and B are non-zero and are chosen so as to |
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C conserve total volume of T. |
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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 "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C bi,bj,k - indices |
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C rhoKm1 - rho in layer above |
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C rhoK - rho in layer below |
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C weightA - weight for level K |
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C weightB - weight for level K+1 |
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C ConvectCount - counter to diagnose where convection occurs |
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C myThid - thread number |
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INTEGER bi,bj,k |
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_RL rhoKm1(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL rhoK(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL weightA(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL weightB(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL ConvectCount(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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INTEGER myThid |
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|
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#ifdef INCLUDE_CONVECT_CALL |
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|
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C !LOCAL VARIABLES: |
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C i,j :: Loop counter |
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C dS,d1,d2 :: Layer thicknesses |
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INTEGER i,j |
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_RL dS,d1,d2 |
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CEOP |
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|
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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IF ( _hFacC(i,j,k-1,bi,bj) |
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& *_hFacC(i,j,k,bi,bj) .GT. 0. |
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& .AND. (rhokm1(i,j)-rhok(i,j))*rKfac*gravitySign .GT. 0. |
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& ) THEN |
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|
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C Where statically unstable, mix the tracers conserving volume |
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d1 = _hFacC(i,j,k-1,bi,bj)*drF(k-1) |
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d2 = _hFacC(i,j, k ,bi,bj)*drF( k ) |
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dS = d1+d2 |
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weightA(i,j) = d2/dS |
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weightB(i,j) = d1/dS |
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ConvectCount(i,j,k) = ConvectCount(i,j,k) + 1. |
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ELSE |
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C Where statically stable, do nothing |
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weightA(i,j) = 0. |
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weightB(i,j) = 0. |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#endif /* INCLUDE_CONVECT_CALL */ |
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|
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RETURN |
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END |
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