model/src/grad_sigma.F

C $Header: /u/gcmpack/models/MITgcmUV/model/src/grad_sigma.F,v 1.1 2000/06/21 18:58:25 adcroft Exp $
C $Name: $

#include "CPP_OPTIONS.h"

      SUBROUTINE GRAD_SIGMA(
     I             bi, bj, iMin, iMax, jMin, jMax, K,
     I             rhoK, sigKm1, sigKp1,
     O             sigmaX, sigmaY, sigmaR,
     I             myThid )
C     /==========================================================\
C     | SUBROUTINE CALC_ISOSLOPES                                |
C     | o Calculate isoneutral gradients                         |
C     |==========================================================|
C     \==========================================================/
      IMPLICIT NONE

C     == Global variables ==
#include "SIZE.h"
#include "GRID.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C     == Routine arguments ==
C
      INTEGER bi,bj,iMin,iMax,jMin,jMax,K
      _RL rhoK(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
      _RL sigKm1(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
      _RL sigKp1(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
      _RL sigmaX(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
      _RL sigmaY(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
      _RL sigmaR(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
      INTEGER myThid

C     == Local variables ==
      INTEGER i,j

      DO j=1-Oly,sNy+Oly
       DO i=1-Olx+1,sNx+Olx
        sigmaX(i,j,k)=_maskW(i,j,k,bi,bj)
     &        *_recip_dxC(i,j,bi,bj)
     &        *(rhoK(i,j)-rhoK(i-1,j))
       ENDDO
      ENDDO

      DO j=1-Oly+1,sNy+Oly
       DO i=1-Olx,sNx+Olx
        sigmaY(i,j,k)=_maskS(i,j,k,bi,bj)
     &        *_recip_dyC(i,j,bi,bj)
     &        *(rhoK(i,j)-rhoK(i,j-1))
       ENDDO
      ENDDO

      DO j=1-Oly,sNy+Oly
       DO i=1-Olx,sNx+Olx
        IF (K.NE.1 .AND. hfacC(i,j,k,bi,bj).NE.0.) THEN
         sigmaR(i,j,k)=recip_drC(k)*rkFac*(sigKm1(i,j)-sigKp1(i,j))
        ELSE
         sigmaR(i,j,k)=0.
        ENDIF
       ENDDO
      ENDDO

      RETURN
      END
1	C $Header: /u/gcmpack/models/MITgcmUV/model/src/grad_sigma.F,v 1.1 2000/06/21 18:58:25 adcroft Exp $
2	C $Name: $
3
4	#include "CPP_OPTIONS.h"
5
6	SUBROUTINE GRAD_SIGMA(
7	I bi, bj, iMin, iMax, jMin, jMax, K,
8	I rhoK, sigKm1, sigKp1,
9	O sigmaX, sigmaY, sigmaR,
10	I myThid )
11	C /==========================================================\
12	C \| SUBROUTINE CALC_ISOSLOPES \|
13	C \| o Calculate isoneutral gradients \|
14	C \|==========================================================\|
15	C \==========================================================/
16	IMPLICIT NONE
17
18	C == Global variables ==
19	#include "SIZE.h"
20	#include "GRID.h"
21	#include "EEPARAMS.h"
22	#include "PARAMS.h"
23
24	C == Routine arguments ==
25	C
26	INTEGER bi,bj,iMin,iMax,jMin,jMax,K
27	_RL rhoK(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
28	_RL sigKm1(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
29	_RL sigKp1(1-Olx:sNx+Olx,1-Oly:sNy+Oly)
30	_RL sigmaX(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
31	_RL sigmaY(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
32	_RL sigmaR(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
33	INTEGER myThid
34
35	C == Local variables ==
36	INTEGER i,j
37
38	DO j=1-Oly,sNy+Oly
39	DO i=1-Olx+1,sNx+Olx
40	sigmaX(i,j,k)=_maskW(i,j,k,bi,bj)
41	& *_recip_dxC(i,j,bi,bj)
42	& *(rhoK(i,j)-rhoK(i-1,j))
43	ENDDO
44	ENDDO
45
46	DO j=1-Oly+1,sNy+Oly
47	DO i=1-Olx,sNx+Olx
48	sigmaY(i,j,k)=_maskS(i,j,k,bi,bj)
49	& *_recip_dyC(i,j,bi,bj)
50	& *(rhoK(i,j)-rhoK(i,j-1))
51	ENDDO
52	ENDDO
53
54	DO j=1-Oly,sNy+Oly
55	DO i=1-Olx,sNx+Olx
56	IF (K.NE.1 .AND. hfacC(i,j,k,bi,bj).NE.0.) THEN
57	sigmaR(i,j,k)=recip_drC(k)rkFac(sigKm1(i,j)-sigKp1(i,j))
58	ELSE
59	sigmaR(i,j,k)=0.
60	ENDIF
61	ENDDO
62	ENDDO
63
64	RETURN
65	END