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C $Header: /u/gcmpack/models/MITgcmUV/model/src/ini_masks_etc.F,v 1.16 1999/05/05 18:32:34 adcroft Exp $ |
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#include "CPP_OPTIONS.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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IMPLICIT NONE |
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|
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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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|
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C == Routine arguments == |
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C myThid - Number of this instance of INI_MASKS_ETC |
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INTEGER myThid |
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CEndOfInterface |
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|
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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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#ifdef ALLOW_NONHYDROSTATIC |
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INTEGER Km1 |
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_RL hFacUpper,hFacLower |
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#endif |
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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, Nr |
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DO J=1,sNy |
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DO I=1,sNx |
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C Round depths within a small fraction of layer depth to that |
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C layer depth. |
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IF ( ABS(H(I,J,bi,bj)-rF(K)) .LT. |
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& 1. _d -6*ABS(rF(K)) .AND. |
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& ABS(H(I,J,bi,bj)-rF(K)) .LT. |
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& 1. _d -6*ABS(H(I,J,bi,bj)) )THEN |
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H(I,J,bi,bj) = rF(K) |
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ENDIF |
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IF ( H(I,J,bi,bj)*rkFac .GE. rF(K)*rkFac ) THEN |
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C Top of cell is 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)*rkFac .LE. rF(K+1)*rkFac ) THEN |
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C Base of domain is below bottom of 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 to the fraction of the cell that is open. |
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hFacC(I,J,K,bi,bj) = |
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& (rF(K)*rkFac-H(I,J,bi,bj)*rkFac)*recip_drF(K) |
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ENDIF |
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C Impose minimum fraction |
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IF (hFacC(I,J,K,bi,bj).LT.hFacMin) THEN |
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IF (hFacC(I,J,K,bi,bj).LT.hFacMin*0.5) THEN |
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hFacC(I,J,K,bi,bj)=0. |
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ELSE |
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hFacC(I,J,K,bi,bj)=hFacMin |
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ENDIF |
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ENDIF |
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C Impose minimum size (dimensional) |
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IF (drF(k)*hFacC(I,J,K,bi,bj).LT.hFacMinDr) THEN |
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IF (drF(k)*hFacC(I,J,K,bi,bj).LT.hFacMinDr*0.5) THEN |
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hFacC(I,J,K,bi,bj)=0. |
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ELSE |
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hFacC(I,J,K,bi,bj)=hFacMinDr*recip_drF(k) |
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ENDIF |
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ENDIF |
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depthInK(i,j,bi,bj) = depthInK(i,j,bi,bj) + 1. |
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Crg & +hFacC(i,j,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(hFacC , myThid ) |
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_EXCH_XY_R4( depthInK, myThid ) |
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|
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CALL PLOT_FIELD_XYRS( depthInK, |
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& 'Model Depths K Index' , 1, myThid ) |
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|
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C Re-calculate depth of ocean, taking into account 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 J=1,sNy |
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DO I=1,sNx |
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H(I,J,bi,bj)=0. |
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DO K=1,Nr |
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H(I,J,bi,bj)=H(I,J,bi,bj)- |
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& rkFac*drF(k)*hFacC(I,J,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_XY_R4(H , myThid ) |
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CALL WRITE_FLD_XY_RS( 'Depth',' ',H,0,myThid) |
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C CALL MDSWRITEFIELD( 'Depth', writeBinaryPrec, .TRUE., |
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C & 'RS', 1, H, 1, -1, myThid ) |
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|
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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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recip_H(i,j,bi,bj) = 0. _d 0 |
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ELSE |
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recip_H(i,j,bi,bj) = 1. _d 0 / abs( H(i,j,bi,bj) ) |
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ENDIF |
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depthInK(i,j,bi,bj) = 0. |
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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( recip_H, myThid ) |
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|
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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, Nr |
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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,Nr |
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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. _d 0 ) THEN |
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recip_HFacC(I,J,K,bi,bj) = 1. _d 0 / HFacC(I,J,K,bi,bj) |
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ELSE |
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recip_HFacC(I,J,K,bi,bj) = 0. _d 0 |
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ENDIF |
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IF (HFacW(I,J,K,bi,bj) .NE. 0. _d 0 ) THEN |
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recip_HFacW(I,J,K,bi,bj) = 1. _d 0 / HFacW(I,J,K,bi,bj) |
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maskW(I,J,K,bi,bj) = 1. _d 0 |
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ELSE |
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recip_HFacW(I,J,K,bi,bj) = 0. _d 0 |
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maskW(I,J,K,bi,bj) = 0.0 _d 0 |
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ENDIF |
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IF (HFacS(I,J,K,bi,bj) .NE. 0. _d 0 ) THEN |
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recip_HFacS(I,J,K,bi,bj) = 1. _d 0 / HFacS(I,J,K,bi,bj) |
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maskS(I,J,K,bi,bj) = 1. _d 0 |
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ELSE |
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recip_HFacS(I,J,K,bi,bj) = 0. _d 0 |
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maskS(I,J,K,bi,bj) = 0. _d 0 |
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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(recip_HFacC , myThid ) |
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_EXCH_XYZ_R4(recip_HFacW , myThid ) |
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_EXCH_XYZ_R4(recip_HFacS , 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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recip_dxG(I,J,bi,bj)=1.d0/dxG(I,J,bi,bj) |
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recip_dyG(I,J,bi,bj)=1.d0/dyG(I,J,bi,bj) |
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recip_dxC(I,J,bi,bj)=1.d0/dxC(I,J,bi,bj) |
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recip_dyC(I,J,bi,bj)=1.d0/dyC(I,J,bi,bj) |
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recip_dxF(I,J,bi,bj)=1.d0/dxF(I,J,bi,bj) |
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recip_dyF(I,J,bi,bj)=1.d0/dyF(I,J,bi,bj) |
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recip_dxV(I,J,bi,bj)=1.d0/dxV(I,J,bi,bj) |
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recip_dyU(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(recip_dxG, myThid ) |
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_EXCH_XY_R4(recip_dyG, myThid ) |
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_EXCH_XY_R4(recip_dxC, myThid ) |
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_EXCH_XY_R4(recip_dyC, myThid ) |
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_EXCH_XY_R4(recip_dxF, myThid ) |
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_EXCH_XY_R4(recip_dyF, myThid ) |
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_EXCH_XY_R4(recip_dxV, myThid ) |
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_EXCH_XY_R4(recip_dyU, myThid ) |
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|
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#ifdef ALLOW_NONHYDROSTATIC |
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C-- Calculate the reciprocal hfac distance/volume for W cells |
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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,Nr |
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Km1=max(K-1,1) |
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hFacUpper=drF(Km1)/(drF(Km1)+drF(K)) |
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IF (Km1.EQ.K) hFacUpper=0. |
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hFacLower=drF(K)/(drF(Km1)+drF(K)) |
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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.) THEN |
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IF (hFacC(I,J,K,bi,bj).LE.0.5) THEN |
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recip_hFacU(I,J,K,bi,bj)= |
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& hFacUpper+hFacLower*hFacC(I,J,K,bi,bj) |
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ELSE |
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recip_hFacU(I,J,K,bi,bj)=1. |
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ENDIF |
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ELSE |
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recip_hFacU(I,J,K,bi,bj)=0. |
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ENDIF |
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IF (recip_hFacU(I,J,K,bi,bj).NE.0.) |
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& recip_hFacU(I,J,K,bi,bj)=1./recip_hFacU(I,J,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_XY_R4(recip_hFacU, myThid ) |
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#endif |
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C |
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RETURN |
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END |
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