pkg/mom_fluxform/mom_u_coriolis.F

6d54cf9ca1 Ed H*0001 #include "MOM_FLUXFORM_OPTIONS.h"
aea29c8517 Alis*0002
71207ba845 Alis*0003 CBOP
                0004 C !ROUTINE: MOM_U_CORIOLIS
                0005
                0006 C !INTERFACE: ==========================================================
010a91abcf Jean*0007       SUBROUTINE MOM_U_CORIOLIS(
31fb0e0e6d Jean*0008      I        bi, bj, k, vFld,
aea29c8517 Alis*0009      U        uCoriolisTerm,
31fb0e0e6d Jean*0010      I        myThid )
aea29c8517 Alis*0011
71207ba845 Alis*0012 C !DESCRIPTION:
                0013 C Calculates the horizontal Coriolis term in the zonal equation:
                0014 C \begin{equation*}
                0015 C \overline{f}^i \overline{v}^{ij}
                0016 C \end{equation*}
aea29c8517 Alis*0017
71207ba845 Alis*0018 C !USES: ===============================================================
                0019       IMPLICIT NONE
aea29c8517 Alis*0020 #include "SIZE.h"
                0021 #include "EEPARAMS.h"
                0022 #include "PARAMS.h"
                0023 #include "GRID.h"
                0024 #include "SURFACE.h"
                0025
71207ba845 Alis*0026 C !INPUT PARAMETERS: ===================================================
31fb0e0e6d Jean*0027 C  bi, bj               :: tile indices
71207ba845 Alis*0028 C  k                    :: vertical level
                0029 C  vFld                 :: meridional flow
                0030 C  myThid               :: thread number
31fb0e0e6d Jean*0031       INTEGER bi, bj, k
aea29c8517 Alis*0032       _RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0033       INTEGER myThid
                0034
71207ba845 Alis*0035 C !OUTPUT PARAMETERS: ==================================================
                0036 C  uCoriolisTerm        :: Coriolis term
                0037       _RL uCoriolisTerm(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
                0038
                0039 C !LOCAL VARIABLES: ====================================================
                0040 C  i,j                  :: loop indices
31fb0e0e6d Jean*0041       INTEGER i, j
71207ba845 Alis*0042 CEOP
aea29c8517 Alis*0043
31fb0e0e6d Jean*0044       IF ( selectCoriScheme.LE.1 ) THEN
                0045 C-    Original discretization
7843dde2de jm-c 0046        DO j=1-OLy,sNy+OLy-1
                0047         DO i=1-OLx+1,sNx+OLx
31fb0e0e6d Jean*0048          uCoriolisTerm(i,j) = halfRL
                0049      &   *( _fCori( i ,j,bi,bj) + _fCori(i-1,j,bi,bj) )
                0050      &   *0.25 _d 0*( vFld( i ,j) + vFld( i ,j+1)
                0051      &              + vFld(i-1,j) + vFld(i-1,j+1)
                0052      &              )
                0053         ENDDO
                0054        ENDDO
                0055       ELSEIF ( selectCoriScheme.LE.3 ) THEN
                0056 C-    Energy conserving discretization
                0057        DO j=1-OLy,sNy+OLy-1
                0058         DO i=1-OLx+1,sNx+OLx
                0059          uCoriolisTerm(i,j) = halfRL
                0060      &        *( _fCori( i ,j,bi,bj)
                0061      &          *halfRL*( vFld( i ,j) + vFld( i ,j+1) )
04a64662e0 Alis*0062      &         + _fCori(i-1,j,bi,bj)
31fb0e0e6d Jean*0063      &          *halfRL*( vFld(i-1,j) + vFld(i-1,j+1) ) )
04a64662e0 Alis*0064         ENDDO
                0065        ENDDO
                0066       ELSE
31fb0e0e6d Jean*0067 C-    Using averaged transport:
7843dde2de jm-c 0068        DO j=1-OLy,sNy+OLy-1
                0069         DO i=1-OLx+1,sNx+OLx
31fb0e0e6d Jean*0070          uCoriolisTerm(i,j) = halfRL
                0071      &   *( _fCori( i ,j,bi,bj) + _fCori(i-1,j,bi,bj) )
                0072      &   *( vFld( i , j )*dxG( i , j ,bi,bj)*hFacS( i , j ,k,bi,bj)
                0073      &    + vFld( i ,j+1)*dxG( i ,j+1,bi,bj)*hFacS( i ,j+1,k,bi,bj)
                0074      &    + vFld(i-1, j )*dxG(i-1, j ,bi,bj)*hFacS(i-1, j ,k,bi,bj)
                0075      &    + vFld(i-1,j+1)*dxG(i-1,j+1,bi,bj)*hFacS(i-1,j+1,k,bi,bj)
                0076      &    )*0.25 _d 0*recip_dxC(i,j,bi,bj)*recip_hFacW(i,j,k,bi,bj)
04a64662e0 Alis*0077         ENDDO
aea29c8517 Alis*0078        ENDDO
04a64662e0 Alis*0079       ENDIF
aea29c8517 Alis*0080
7843dde2de jm-c 0081       IF ( selectCoriScheme.EQ.1 .OR. selectCoriScheme.EQ.3 ) THEN
31fb0e0e6d Jean*0082 C-    Scale term so that only "wet" points are used
                0083 C     Due to: Jamart and Ozer, 1986, JGR 91 (C9), 10,621-10,631
8088b71082 Alis*0084 C         "Numerical Boundary Layers and Spurious Residual Flows"
7843dde2de jm-c 0085        DO j=1-OLy,sNy+OLy-1
                0086         DO i=1-OLx+1,sNx+OLx
8088b71082 Alis*0087          uCoriolisTerm(i,j) = uCoriolisTerm(i,j)
31fb0e0e6d Jean*0088      &   *4. _d 0/MAX( oneRS,
010a91abcf Jean*0089      &                 maskS( i , j ,k,bi,bj)+maskS( i ,j+1,k,bi,bj)
                0090      &                +maskS(i-1, j ,k,bi,bj)+maskS(i-1,j+1,k,bi,bj) )
8088b71082 Alis*0091         ENDDO
                0092        ENDDO
                0093       ENDIF
                0094
aea29c8517 Alis*0095       RETURN
                0096       END