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C $Header: /u/gcmpack/models/MITgcmUV/model/src/ini_depths.F,v 1.3 1998/06/08 21:43:01 cnh Exp $ |
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#include "CPP_EEOPTIONS.h" |
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|
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CStartOfInterface |
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SUBROUTINE INI_DEPTHS( myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE INI_DEPTHS | |
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C | o Initialise map of model depths | |
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C |==========================================================| |
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C | The depths of the bottom of the model is specified in | |
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C | terms of an XY map with one depth for each column of | |
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C | grid cells. Depths do not have to coincide with the | |
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C | model levels. The model's lopping algorithm makes it | |
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C | possible to represent arbitrary depths. | |
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C | The mode depths map also influences the models topology | |
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C | By default the model domain wraps around in X and Y. | |
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C | This default doubly periodic topology is "supressed" | |
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C | if a depth map is defined which closes off all wrap | |
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C | around flow. | |
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C \==========================================================/ |
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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_DEPTHS |
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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 xG, yG - Global coordinate location. |
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C zG |
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C zUpper - Work arrays for upper and lower |
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C zLower cell-face heights. |
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C phi - Temporary scalar |
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C iG, jG - Global coordinate index |
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C bi,bj - Loop counters |
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C zUpper - Temporary arrays holding z coordinates of |
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C zLower upper and lower faces. |
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C I,J,K |
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_RL xG, yG, zG |
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_RL phi |
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_RL zUpper(Nz), zLower(Nz) |
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INTEGER iG, jG |
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INTEGER bi, bj |
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INTEGER I, J, K |
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|
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_BARRIER |
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IF ( bathyFile .EQ. ' ' ) THEN |
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C Set up a flat bottom box with doubly periodic topology. |
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C H is the basic variable from which other terms are derived. It |
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C is the term that would be set from an external file for a |
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C realistic problem. |
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phi = 0. D0 |
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DO K=1,Nz |
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phi = phi+delZ(K) |
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ENDDO |
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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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iG = myXGlobalLo-1+(bi-1)*sNx+I |
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jG = myYGlobalLo-1+(bj-1)*sNy+J |
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C Default depth of full domain |
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H(i,j,bi,bj) = phi |
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C Test for eastern edge |
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IF ( iG .EQ. nX ) H(i,j,bi,bj) = 0. |
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C Test for northern edge |
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IF ( jG .EQ. nY ) H(i,j,bi,bj) = 0. |
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C Island |
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IF ( iG .EQ. 1 .AND. |
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& jG .EQ. 24 ) H(i,j,bi,bj) = 0.75*phi |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ELSE |
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_BEGIN_MASTER( myThid ) |
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CALL READ_FLD_XY_RS( bathyFile, ' ', H, 0, myThid ) |
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_END_MASTER(myThid) |
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ENDIF |
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_EXCH_XY_R4( H, myThid ) |
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|
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C-- Cacluate 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-- Now calculate "lopping" factors hFac. |
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zG = delZ(1)*0.5 D0 |
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zFace(1) = 0 |
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rDzC(1) = 2. _d 0/delZ(1) |
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DO K=1,Nz-1 |
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saFac(K) = 1. D0 |
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zC(K) = zG |
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zG = zG + (delZ(K)+delZ(K+1))*0.5 D0 |
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zFace(K+1) = zFace(K)+delZ(K) |
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rDzC(K+1) = 2. _d 0/(delZ(K)+delZ(K+1)) |
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ENDDO |
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zC(Nz) = zG |
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zFace(Nz+1) = zFace(Nz)+delZ(Nz) |
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DO K=1,Nz |
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zUpper(K) = zFace(K) |
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zLower(K) = zFace(K+1) |
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dzF(K) = delz(K) |
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rdzF(K) = 1.d0/dzF(K) |
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ENDDO |
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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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hFacC(I,J,K,bi,bj) = 1. |
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IF ( H(I,J,bi,bj) .LE. zUpper(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. zLower(K) ) 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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phi = zUpper(K)-H(I,J,bi,bj) |
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hFacC(I,J,K,bi,bj) = phi/(zUpper(K)-zLower(K)) |
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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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|
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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-- Calculate recipricols of hFacC, hFacW and hFacS |
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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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rhFacC(I,J,K,bi,bj)=0. D0 |
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if (hFacC(I,J,K,bi,bj).ne.0.) |
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& rhFacC(I,J,K,bi,bj)=1. D0 /hFacC(I,J,K,bi,bj) |
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rhFacW(I,J,K,bi,bj)=0. D0 |
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if (hFacW(I,J,K,bi,bj).ne.0.) |
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& rhFacW(I,J,K,bi,bj)=1. D0 /hFacW(I,J,K,bi,bj) |
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rhFacS(I,J,K,bi,bj)=0. D0 |
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if (hFacS(I,J,K,bi,bj).ne.0.) |
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& rhFacS(I,J,K,bi,bj)=1. D0 /hFacS(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(rhFacC , myThid ) |
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_EXCH_XYZ_R4(rhFacW , myThid ) |
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_EXCH_XYZ_R4(rhFacS , myThid ) |
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C |
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RETURN |
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END |
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