pkg/mom_vecinv/mom_calc_strain.F

C $Header: $
C $Name: $

#include "CPP_OPTIONS.h"

      SUBROUTINE MOM_CALC_STRAIN( 
     I        bi,bj,k,
     I        uFld, vFld, hFacZ,
     O        strain,
     I        myThid)
      IMPLICIT NONE
C     /==========================================================\
C     | S/R MOM_CALC_STRAIN                                      |
C     |==========================================================|
C     \==========================================================/

C     == Global variables ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
C     == Routine arguments ==
C     myThid - Instance number for this innvocation of CALC_MOM_RHS
      INTEGER bi,bj,k
      _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RS hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL strain(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      INTEGER myThid

C     == Local variables ==
      INTEGER i,j

      DO J=2-Oly,sNy+Oly
       DO I=2-Olx,sNx+Olx

C       Horizontal curl of flow field - ignoring lopping factors
        strain(I,J)=
     &    dyu(I,J,bi,bj)*recip_dxv(I,J,bi,bj)*(
     &              vFld( I , J )*recip_dyc( I , J ,bi,bj)
     &             -vFld(I-1, J )*recip_dyc(I-1, J ,bi,bj) )
     &   +dxv(I,J,bi,bj)*recip_dyu(I,J,bi,bj)*(
     &             +uFld( I , J )*recip_dxc( I , J ,bi,bj)
     &             -uFld( I ,J-1)*recip_dxc( I ,J-1,bi,bj) )

C       Horizontal curl of flow field - including lopping factors
        IF (hFacZ(i,j).EQ.0.) THEN
         strain(I,J)=0.
        ENDIF

       ENDDO
      ENDDO
        
C     Special stuff for Cubed Sphere
      IF (useCubedSphereExchange) THEN
        I=1
        J=1
        strain(I,J)=0.
        I=sNx+1
        J=1
        strain(I,J)=0.
        I=1
        J=sNy+1
        strain(I,J)=0.
        I=sNx+1
        J=sNy+1
        strain(I,J)=0.
      ENDIF

      RETURN
      END
1	C $Header: $
2	C $Name: $
3
4	#include "CPP_OPTIONS.h"
5
6	SUBROUTINE MOM_CALC_STRAIN(
7	I bi,bj,k,
8	I uFld, vFld, hFacZ,
9	O strain,
10	I myThid)
11	IMPLICIT NONE
12	C /==========================================================\
13	C \| S/R MOM_CALC_STRAIN \|
14	C \|==========================================================\|
15	C \==========================================================/
16
17	C == Global variables ==
18	#include "SIZE.h"
19	#include "EEPARAMS.h"
20	#include "PARAMS.h"
21	#include "GRID.h"
22	C == Routine arguments ==
23	C myThid - Instance number for this innvocation of CALC_MOM_RHS
24	INTEGER bi,bj,k
25	_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
26	_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
27	_RS hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28	_RL strain(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29	INTEGER myThid
30
31	C == Local variables ==
32	INTEGER i,j
33
34	DO J=2-Oly,sNy+Oly
35	DO I=2-Olx,sNx+Olx
36
37	C Horizontal curl of flow field - ignoring lopping factors
38	strain(I,J)=
39	& dyu(I,J,bi,bj)recip_dxv(I,J,bi,bj)(
40	& vFld( I , J )*recip_dyc( I , J ,bi,bj)
41	& -vFld(I-1, J )*recip_dyc(I-1, J ,bi,bj) )
42	& +dxv(I,J,bi,bj)recip_dyu(I,J,bi,bj)(
43	& +uFld( I , J )*recip_dxc( I , J ,bi,bj)
44	& -uFld( I ,J-1)*recip_dxc( I ,J-1,bi,bj) )
45
46	C Horizontal curl of flow field - including lopping factors
47	IF (hFacZ(i,j).EQ.0.) THEN
48	strain(I,J)=0.
49	ENDIF
50
51	ENDDO
52	ENDDO
53
54	C Special stuff for Cubed Sphere
55	IF (useCubedSphereExchange) THEN
56	I=1
57	J=1
58	strain(I,J)=0.
59	I=sNx+1
60	J=1
61	strain(I,J)=0.
62	I=1
63	J=sNy+1
64	strain(I,J)=0.
65	I=sNx+1
66	J=sNy+1
67	strain(I,J)=0.
68	ENDIF
69
70	RETURN
71	END