model/src/calc_div_ghat.F

C $Header: /u/gcmpack/models/MITgcmUV/model/src/calc_div_ghat.F,v 1.9 1999/05/18 17:42:01 adcroft Exp $

#include "CPP_OPTIONS.h"

C     /==========================================================\
C     | S/R CALC_DIV_GHAT                                        |
C     | o Form the right hand-side of the surface pressure eqn.  |
C     |==========================================================|
C     \==========================================================/
      SUBROUTINE CALC_DIV_GHAT( 
     I        bi,bj,iMin,iMax,jMin,jMax,
     I        K,
     I        xA,yA,
     I        myThid)

      IMPLICIT NONE

C     == Global variables ==
#include "SIZE.h"
#include "DYNVARS.h"
#include "FFIELDS.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "CG2D.h"
#ifdef ALLOW_NONHYDROSTATIC
#include "CG3D.h"
#endif

C     == Routine arguments ==
C     bi, bj, iMin, iMax, jMin, jMax - Range of points for which calculation
C                                      results will be set.
C     k                              - Index of layer.
C     xA, yA                         - Cell face areas
C     myThid - Instance number for this innvocation of CALC_MOM_RHS
      INTEGER bi,bj,iMin,iMax,jMin,jMax
      INTEGER K
      _RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RS yA (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      INTEGER myThid

C     == Local variables ==
      INTEGER i,j
      _RL pf (1-OLx:sNx+OLx,1-OLy:sNy+OLy)

C--   Pressure equation source term
C     Term is the vertical integral of the divergence of the 
C     time tendency terms along with a relaxation term that
C     pulls div(U) + dh/dt back toward zero.

      IF ( k .EQ. Nr ) THEN
C      Initialise source term on first pass
       DO j=1,sNy
        DO i=1,sNx
C Note: The source term containing cg2d_x and cg3d_x (at k=1)
C       has been moved to solve_for_pressure.F for convenience.
         cg2d_b(i,j,bi,bj) =
     &     freeSurfFac*_rA(i,j,bi,bj)*horiVertRatio*( 0.
#ifdef USE_NATURAL_BCS
     &      +EmPmR(I,J,bi,bj)/deltaTMom
#endif
     &     )
        ENDDO
       ENDDO
      ENDIF

      DO j=1,sNy
       DO i=1,sNx+1
        pf(i,j) = xA(i,j)*gUNm1(i,j,k,bi,bj) / deltaTmom
       ENDDO
      ENDDO
      DO j=1,sNy
       DO i=1,sNx
        cg2d_b(i,j,bi,bj) = cg2d_b(i,j,bi,bj) +
     &   pf(i+1,j)-pf(i,j)
       ENDDO
      ENDDO

#ifdef ALLOW_NONHYDROSTATIC
      IF (nonHydrostatic) THEN
       DO j=1,sNy
        DO i=1,sNx
         cg3d_b(i,j,k,bi,bj) = pf(i+1,j)-pf(i,j)
        ENDDO
       ENDDO
      ENDIF
#endif

      DO j=1,sNy+1
       DO i=1,sNx
        pf(i,j) = yA(i,j)*gVNm1(i,j,k,bi,bj) / deltatmom
       ENDDO
      ENDDO

      DO j=1,sNy
       DO i=1,sNx
        cg2d_b(i,j,bi,bj) = cg2d_b(i,j,bi,bj) +
     &   pf(i,j+1)-pf(i,j)
       ENDDO
      ENDDO

#ifdef ALLOW_NONHYDROSTATIC
      IF (nonHydrostatic) THEN
       DO j=1,sNy
        DO i=1,sNx
         cg3d_b(i,j,k,bi,bj) = cg3d_b(i,j,k,bi,bj) +
     &    pf(i,j+1)-pf(i,j)
        ENDDO
       ENDDO
      ENDIF
#endif

      RETURN
      END
1	C $Header: /u/gcmpack/models/MITgcmUV/model/src/calc_div_ghat.F,v 1.9 1999/05/18 17:42:01 adcroft Exp $
2
3	#include "CPP_OPTIONS.h"
4
5	C /==========================================================\
6	C \| S/R CALC_DIV_GHAT \|
7	C \| o Form the right hand-side of the surface pressure eqn. \|
8	C \|==========================================================\|
9	C \==========================================================/
10	SUBROUTINE CALC_DIV_GHAT(
11	I bi,bj,iMin,iMax,jMin,jMax,
12	I K,
13	I xA,yA,
14	I myThid)
15
16	IMPLICIT NONE
17
18	C == Global variables ==
19	#include "SIZE.h"
20	#include "DYNVARS.h"
21	#include "FFIELDS.h"
22	#include "EEPARAMS.h"
23	#include "PARAMS.h"
24	#include "GRID.h"
25	#include "CG2D.h"
26	#ifdef ALLOW_NONHYDROSTATIC
27	#include "CG3D.h"
28	#endif
29
30	C == Routine arguments ==
31	C bi, bj, iMin, iMax, jMin, jMax - Range of points for which calculation
32	C results will be set.
33	C k - Index of layer.
34	C xA, yA - Cell face areas
35	C myThid - Instance number for this innvocation of CALC_MOM_RHS
36	INTEGER bi,bj,iMin,iMax,jMin,jMax
37	INTEGER K
38	_RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
39	_RS yA (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
40	INTEGER myThid
41
42	C == Local variables ==
43	INTEGER i,j
44	_RL pf (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
45
46	C-- Pressure equation source term
47	C Term is the vertical integral of the divergence of the
48	C time tendency terms along with a relaxation term that
49	C pulls div(U) + dh/dt back toward zero.
50
51	IF ( k .EQ. Nr ) THEN
52	C Initialise source term on first pass
53	DO j=1,sNy
54	DO i=1,sNx
55	C Note: The source term containing cg2d_x and cg3d_x (at k=1)
56	C has been moved to solve_for_pressure.F for convenience.
57	cg2d_b(i,j,bi,bj) =
58	& freeSurfFac_rA(i,j,bi,bj)horiVertRatio*( 0.
59	#ifdef USE_NATURAL_BCS
60	& +EmPmR(I,J,bi,bj)/deltaTMom
61	#endif
62	& )
63	ENDDO
64	ENDDO
65	ENDIF
66
67	DO j=1,sNy
68	DO i=1,sNx+1
69	pf(i,j) = xA(i,j)*gUNm1(i,j,k,bi,bj) / deltaTmom
70	ENDDO
71	ENDDO
72	DO j=1,sNy
73	DO i=1,sNx
74	cg2d_b(i,j,bi,bj) = cg2d_b(i,j,bi,bj) +
75	& pf(i+1,j)-pf(i,j)
76	ENDDO
77	ENDDO
78
79	#ifdef ALLOW_NONHYDROSTATIC
80	IF (nonHydrostatic) THEN
81	DO j=1,sNy
82	DO i=1,sNx
83	cg3d_b(i,j,k,bi,bj) = pf(i+1,j)-pf(i,j)
84	ENDDO
85	ENDDO
86	ENDIF
87	#endif
88
89	DO j=1,sNy+1
90	DO i=1,sNx
91	pf(i,j) = yA(i,j)*gVNm1(i,j,k,bi,bj) / deltatmom
92	ENDDO
93	ENDDO
94
95	DO j=1,sNy
96	DO i=1,sNx
97	cg2d_b(i,j,bi,bj) = cg2d_b(i,j,bi,bj) +
98	& pf(i,j+1)-pf(i,j)
99	ENDDO
100	ENDDO
101
102	#ifdef ALLOW_NONHYDROSTATIC
103	IF (nonHydrostatic) THEN
104	DO j=1,sNy
105	DO i=1,sNx
106	cg3d_b(i,j,k,bi,bj) = cg3d_b(i,j,k,bi,bj) +
107	& pf(i,j+1)-pf(i,j)
108	ENDDO
109	ENDDO
110	ENDIF
111	#endif
112
113	RETURN
114	END