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C $Header: /u/gcmpack/models/MITgcmUV/model/src/ini_masks_etc.F,v 1.1 1998/07/02 14:17:11 adcroft Exp $ |
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#include "CPP_EEOPTIONS.h" |
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CStartOfInterface |
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SUBROUTINE INI_MASKS_ETC( myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE INI_MASKS_ETC | |
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C | o Initialise masks and topography factors | |
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C |==========================================================| |
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C | These arrays are used throughout the code and describe | |
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C | the topography of the domain through masks (0s and 1s) | |
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C | and fractional height factors (0<hFac<1). The latter | |
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C | distinguish between the lopped-cell and full-step | |
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C | topographic representations. | |
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C \==========================================================/ |
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C === Global variables === |
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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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C == Routine arguments == |
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C myThid - Number of this instance of INI_CARTESIAN_GRID |
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INTEGER myThid |
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CEndOfInterface |
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C == Local variables == |
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C bi,bj - Loop counters |
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C I,J,K |
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INTEGER bi, bj |
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INTEGER I, J, K |
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C Calculate quantities derived from XY depth map |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO J=1,sNy |
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DO I=1,sNx |
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C Inverse of depth |
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IF ( h(i,j,bi,bj) .EQ. 0. _d 0 ) THEN |
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rH(i,j,bi,bj) = 0. _d 0 |
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ELSE |
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rH(i,j,bi,bj) = 1. _d 0 / H(i,j,bi,bj) |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_EXCH_XY_R4( rH, myThid ) |
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|
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C Calculate lopping factor hFacC |
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DO bj=myByLo(myThid), myByHi(myThid) |
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DO bi=myBxLo(myThid), myBxHi(myThid) |
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DO K=1, Nz |
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DO J=1,sNy |
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DO I=1,sNx |
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IF ( H(I,J,bi,bj) .LE. zFace(K) ) THEN |
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C Below base of domain |
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hFacC(I,J,K,bi,bj) = 0. |
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ELSEIF ( H(I,J,bi,bj) .GT. zFace(K+1) ) THEN |
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C Base of domain is below this cell |
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hFacC(I,J,K,bi,bj) = 1. |
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ELSE |
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C Base of domain is in this cell |
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C Set hFac tp the fraction of the cell that is open. |
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hFacC(I,J,K,bi,bj) = |
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& (zFace(K)-H(I,J,bi,bj))/(zFace(K)-zFace(K+1)) |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_EXCH_XYZ_R4(hFacC , myThid ) |
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C hFacW and hFacS (at U and V points) |
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DO bj=myByLo(myThid), myByHi(myThid) |
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DO bi=myBxLo(myThid), myBxHi(myThid) |
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DO K=1, Nz |
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DO J=1,sNy |
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DO I=1,sNx |
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hFacW(I,J,K,bi,bj)= |
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& MIN(hFacC(I,J,K,bi,bj),hFacC(I-1,J,K,bi,bj)) |
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hFacS(I,J,K,bi,bj)= |
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& MIN(hFacC(I,J,K,bi,bj),hFacC(I,J-1,K,bi,bj)) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_EXCH_XYZ_R4(hFacW , myThid ) |
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_EXCH_XYZ_R4(hFacS , myThid ) |
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|
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C Masks and reciprocals of hFac[CWS] |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO K=1,Nz |
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DO J=1,sNy |
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DO I=1,sNx |
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IF (HFacC(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
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rHFacC(I,J,K,bi,bj) = 1. D0 / HFacC(I,J,K,bi,bj) |
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ELSE |
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rHFacC(I,J,K,bi,bj) = 0. D0 |
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ENDIF |
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IF (HFacW(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
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rHFacW(I,J,K,bi,bj) = 1. D0 / HFacW(I,J,K,bi,bj) |
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maskW(I,J,K,bi,bj) = 1. D0 |
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ELSE |
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rHFacW(I,J,K,bi,bj) = 0. D0 |
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maskW(I,J,K,bi,bj) = 0.0 D0 |
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ENDIF |
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IF (HFacS(I,J,K,bi,bj) .NE. 0. D0 ) THEN |
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rHFacS(I,J,K,bi,bj) = 1. D0 / HFacS(I,J,K,bi,bj) |
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maskS(I,J,K,bi,bj) = 1. D0 |
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ELSE |
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rHFacS(I,J,K,bi,bj) = 0. D0 |
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maskS(I,J,K,bi,bj) = 0. D0 |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_EXCH_XYZ_R4(rHFacC , myThid ) |
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_EXCH_XYZ_R4(rHFacW , myThid ) |
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_EXCH_XYZ_R4(rHFacS , myThid ) |
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_EXCH_XYZ_R4(maskW , myThid ) |
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_EXCH_XYZ_R4(maskS , myThid ) |
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|
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C Calculate recipricols grid lengths |
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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO J=1,sNy |
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DO I=1,sNx |
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rDxG(I,J,bi,bj)=1.d0/dxG(I,J,bi,bj) |
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rDyG(I,J,bi,bj)=1.d0/dyG(I,J,bi,bj) |
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rDxC(I,J,bi,bj)=1.d0/dxC(I,J,bi,bj) |
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rDyC(I,J,bi,bj)=1.d0/dyC(I,J,bi,bj) |
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rDxF(I,J,bi,bj)=1.d0/dxF(I,J,bi,bj) |
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rDyF(I,J,bi,bj)=1.d0/dyF(I,J,bi,bj) |
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rDxV(I,J,bi,bj)=1.d0/dxV(I,J,bi,bj) |
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rDyU(I,J,bi,bj)=1.d0/dyU(I,J,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_EXCH_XY_R4(rDxG, myThid ) |
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_EXCH_XY_R4(rDyG, myThid ) |
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_EXCH_XY_R4(rDxC, myThid ) |
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_EXCH_XY_R4(rDyC, myThid ) |
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_EXCH_XY_R4(rDxF, myThid ) |
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_EXCH_XY_R4(rDyF, myThid ) |
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_EXCH_XY_R4(rDxV, myThid ) |
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_EXCH_XY_R4(rDyU, myThid ) |
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|
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C |
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RETURN |
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END |
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