| 1 |
C $Header: /u/gcmpack/MITgcm/model/src/grad_sigma.F,v 1.5 2004/11/22 16:27:05 jmc Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "CPP_OPTIONS.h" |
| 5 |
|
| 6 |
CBOP |
| 7 |
C !ROUTINE: GRAD_SIGMA |
| 8 |
C !INTERFACE: |
| 9 |
SUBROUTINE GRAD_SIGMA( |
| 10 |
I bi, bj, iMin, iMax, jMin, jMax, K, |
| 11 |
I rhoK, sigKm1, sigKp1, |
| 12 |
O sigmaX, sigmaY, sigmaR, |
| 13 |
I myThid ) |
| 14 |
C !DESCRIPTION: \bv |
| 15 |
C *==========================================================* |
| 16 |
C | SUBROUTINE CALC_ISOSLOPES |
| 17 |
C | o Calculate isoneutral gradients |
| 18 |
C *==========================================================* |
| 19 |
C \ev |
| 20 |
|
| 21 |
C !USES: |
| 22 |
IMPLICIT NONE |
| 23 |
C == Global variables == |
| 24 |
#include "SIZE.h" |
| 25 |
#include "GRID.h" |
| 26 |
#include "EEPARAMS.h" |
| 27 |
#include "PARAMS.h" |
| 28 |
|
| 29 |
C !INPUT/OUTPUT PARAMETERS: |
| 30 |
C == Routine arguments == |
| 31 |
C rhoK :: density at level k |
| 32 |
C sigKm1 :: upper level density computed at current pressure |
| 33 |
C sigKp1 :: lower level density computed at current pressure |
| 34 |
C sigmaX,Y,R :: iso-neutral gradient of density in 3 directions X,Y,R |
| 35 |
INTEGER bi,bj,iMin,iMax,jMin,jMax,K |
| 36 |
_RL rhoK(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 37 |
_RL sigKm1(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 38 |
_RL sigKp1(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 39 |
_RL sigmaX(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
| 40 |
_RL sigmaY(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
| 41 |
_RL sigmaR(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
| 42 |
INTEGER myThid |
| 43 |
|
| 44 |
C !LOCAL VARIABLES: |
| 45 |
C == Local variables == |
| 46 |
C rhoLoc :: local copy of rhoK |
| 47 |
INTEGER i,j |
| 48 |
_RL rhoLoc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
| 49 |
CEOP |
| 50 |
|
| 51 |
C- safer to work on a local copy of rhoK (before a partial update) |
| 52 |
DO j=1-Oly,sNy+Oly |
| 53 |
DO i=1-Olx,sNx+Olx |
| 54 |
rhoLoc(i,j) = rhoK(i,j) |
| 55 |
ENDDO |
| 56 |
ENDDO |
| 57 |
|
| 58 |
C- Internal exchange for calculations in X |
| 59 |
#ifndef ALLOW_AUTODIFF_TAMC |
| 60 |
IF ( useCubedSphereExchange ) THEN |
| 61 |
CALL FILL_CS_CORNER_TR_RL( .TRUE., rhoLoc, bi,bj, myThid ) |
| 62 |
ENDIF |
| 63 |
#endif |
| 64 |
DO j=1-Oly,sNy+Oly |
| 65 |
DO i=1-Olx+1,sNx+Olx |
| 66 |
sigmaX(i,j,k)=_maskW(i,j,k,bi,bj) |
| 67 |
& *_recip_dxC(i,j,bi,bj) |
| 68 |
& *(rhoLoc(i,j)-rhoLoc(i-1,j)) |
| 69 |
ENDDO |
| 70 |
ENDDO |
| 71 |
|
| 72 |
C- Internal exchange for calculations in Y |
| 73 |
#ifndef ALLOW_AUTODIFF_TAMC |
| 74 |
IF ( useCubedSphereExchange ) THEN |
| 75 |
CALL FILL_CS_CORNER_TR_RL( .FALSE., rhoLoc, bi,bj, myThid ) |
| 76 |
ENDIF |
| 77 |
#endif |
| 78 |
DO j=1-Oly+1,sNy+Oly |
| 79 |
DO i=1-Olx,sNx+Olx |
| 80 |
sigmaY(i,j,k)=_maskS(i,j,k,bi,bj) |
| 81 |
& *_recip_dyC(i,j,bi,bj) |
| 82 |
& *(rhoLoc(i,j)-rhoLoc(i,j-1)) |
| 83 |
ENDDO |
| 84 |
ENDDO |
| 85 |
|
| 86 |
IF (K.EQ.1) THEN |
| 87 |
DO j=1-Oly,sNy+Oly |
| 88 |
DO i=1-Olx,sNx+Olx |
| 89 |
sigmaR(i,j,k)=0. |
| 90 |
ENDDO |
| 91 |
ENDDO |
| 92 |
ELSE |
| 93 |
DO j=1-Oly,sNy+Oly |
| 94 |
DO i=1-Olx,sNx+Olx |
| 95 |
sigmaR(i,j,k)= maskC(i,j,k,bi,bj) |
| 96 |
& *recip_drC(k)*rkSign |
| 97 |
& *(sigKp1(i,j)-sigKm1(i,j)) |
| 98 |
ENDDO |
| 99 |
ENDDO |
| 100 |
ENDIF |
| 101 |
|
| 102 |
RETURN |
| 103 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph