/[MITgcm]/MITgcm/pkg/mom_fluxform/mom_calc_rtrans.F
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Revision 1.1 - (hide annotations) (download)
Sun Jan 26 21:18:50 2003 UTC (21 years, 4 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint50c_post, checkpoint48e_post, checkpoint50c_pre, checkpoint48i_post, checkpoint50d_pre, checkpoint51, checkpoint50, checkpoint50d_post, checkpoint50b_pre, checkpoint51f_post, checkpoint48b_post, checkpoint51d_post, checkpoint48d_pre, checkpoint51j_post, checkpoint48d_post, checkpoint48f_post, checkpoint48h_post, checkpoint51b_pre, checkpoint51h_pre, checkpoint50f_post, checkpoint50a_post, checkpoint50f_pre, branchpoint-genmake2, checkpoint51b_post, checkpoint51c_post, checkpoint50g_post, checkpoint50h_post, checkpoint50e_pre, checkpoint50i_post, checkpoint51i_pre, checkpoint50e_post, checkpoint51e_post, checkpoint49, checkpoint51f_pre, checkpoint48g_post, checkpoint51g_post, checkpoint50b_post, checkpoint51a_post
Branch point for: branch-genmake2, ecco-branch 
change vertical advection of momentum, now in 2 steps:
 1) compute vertical transport: new S/R mom_calc_rtrans.F
    that includes r* specific calculation.
 2) compute vertical advection of momentum using vertical transport.
1 jmc 1.1 C $Header: $
2     C $Name: $
3    
4     #include "CPP_OPTIONS.h"
5    
6     CBOP
7     C !ROUTINE: MOM_CALC_RTRANS
8     C !INTERFACE:
9     SUBROUTINE MOM_CALC_RTRANS(
10     I k, bi, bj,
11     O rTransU, rTransV,
12     I myTime, myIter, myThid)
13     C !DESCRIPTION: \bv
14     C *==========================================================*
15     C | SUBROUTINE MOM_CALC_RTRANS
16     C | o Calculate vertical transports at interface k
17     C | above U & V points (West & South face)
18     C *==========================================================*
19     C | r coordinate (z or p):
20     C | is simply half of the 2 vert. Transp at Center location
21     C | r* coordinate: less simple since
22     C | d.eta/dt / H has to be evaluated locally at U & V points
23     C *==========================================================*
24     C \ev
25    
26     C !USES:
27     IMPLICIT NONE
28     C == GLobal variables ==
29     #include "SIZE.h"
30     #include "DYNVARS.h"
31     #include "EEPARAMS.h"
32     #include "PARAMS.h"
33     #include "GRID.h"
34     #include "SURFACE.h"
35    
36     C !INPUT/OUTPUT PARAMETERS:
37     C == Routine arguments ==
38     C k :: vertical level
39     C bi,bj :: tile indices
40     C rTransU :: vertical transport (above U point)
41     C rTransV :: vertical transport (above V point)
42     C myTime :: current time
43     C myIter :: current iteration number
44     C myThid :: thread number
45     C
46     INTEGER k, bi, bj, myIter, myThid
47     _RL myTime
48     _RL rTransU(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
49     _RL rTransV(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
50    
51     C !LOCAL VARIABLES:
52     #ifdef NONLIN_FRSURF
53     C == Local variables in common block ==
54     C dWtransC :: vertical transp. difference between r & r* coordinates
55     C dWtransU :: same but above u.point location (West face)
56     C dWtransV :: same but above v.point location (South face)
57     COMMON /LOCAL_MOM_CALC_RTRANS/
58     & dWtransC, dWtransU, dWtransV
59     _RL dWtransC(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
60     _RL dWtransU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
61     _RL dWtransV(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
62     #endif /* NONLIN_FRSURF */
63     C == Local variables ==
64     C I, J :: Loop counters
65     INTEGER i,j
66     CEOP
67    
68     #ifdef NONLIN_FRSURF
69     IF ( k.EQ.Nr+1 .AND.
70     & useRealFreshWaterFlux .AND.
71     & buoyancyRelation .EQ. 'OCEANICP' ) THEN
72     DO j=1-OLy+1,sNy+OLy
73     DO i=1-OLx+1,sNx+OLx
74     rTransU(i,j) = convertEmP2rUnit*
75     & 0.5 _d 0*( PmEpR( i ,j,bi,bj)*rA( i ,j,bi,bj)
76     & +PmEpR(i-1,j,bi,bj)*rA(i-1,j,bi,bj) )
77     rTransV(i,j) = convertEmP2rUnit*
78     & 0.5 _d 0*( PmEpR(i, j ,bi,bj)*rA(i, j ,bi,bj)
79     & +PmEpR(i,j-1,bi,bj)*rA(i,j-1,bi,bj) )
80     ENDDO
81     ENDDO
82     ELSEIF ( k.GT.Nr ) THEN
83     #else /* NONLIN_FRSURF */
84     IF ( k.GT.Nr ) THEN
85     #endif /* NONLIN_FRSURF */
86     DO j=1-OLy+1,sNy+OLy
87     DO i=1-OLx+1,sNx+OLx
88     rTransU(i,j) = 0.
89     rTransV(i,j) = 0.
90     ENDDO
91     ENDDO
92     ELSE
93     C- Calculate vertical transports above U & V points (West & South face):
94     DO j=1-OLy+1,sNy+OLy
95     DO i=1-OLx+1,sNx+OLx
96     rTransU(i,j) =
97     & 0.5 _d 0*( wVel(i-1,j,k,bi,bj)*rA(i-1,j,bi,bj)
98     & +wVel( i ,j,k,bi,bj)*rA( i ,j,bi,bj) )
99     rTransV(i,j) =
100     & 0.5 _d 0*( wVel(i,j-1,k,bi,bj)*rA(i,j-1,bi,bj)
101     & +wVel(i, j ,k,bi,bj)*rA(i, j ,bi,bj) )
102     ENDDO
103     ENDDO
104     ENDIF
105    
106     #ifdef NONLIN_FRSURF
107     C--- Modify rTransU & rTransV when using r* coordinate:
108     IF ( select_rStar.NE.0 ) THEN
109    
110     IF ( k.EQ.1) THEN
111     C- Initialise dWtrans :
112     DO j=1-OLy,sNy+OLy
113     DO i=1-OLx,sNx+OLx
114     dWtransC(i,j,bi,bj) = rStarDhCDt(i,j,bi,bj)
115     & *(Ro_surf(i,j,bi,bj)-R_low(i,j,bi,bj))
116     & *rA(i,j,bi,bj)
117     ENDDO
118     ENDDO
119     DO j=1-OLy+1,sNy+OLy
120     DO i=1-OLx+1,sNx+OLx
121     dWtransU(i,j,bi,bj) =
122     & 0.5 _d 0*(dWtransC(i-1,j,bi,bj)+dWtransC(i,j,bi,bj))
123     dWtransV(i,j,bi,bj) =
124     & 0.5 _d 0*(dWtransC(i,j-1,bi,bj)+dWtransC(i,j,bi,bj))
125     ENDDO
126     ENDDO
127    
128     ELSEIF (k.LE.Nr) THEN
129     C- Update dWtrans from previous value (interface k-1):
130     DO j=1-OLy,sNy+OLy
131     DO i=1-OLx,sNx+OLx
132     dWtransC(i,j,bi,bj) = dWtransC(i,j,bi,bj)
133     & - rStarDhCDt(i,j,bi,bj)*drF(k-1)*h0FacC(i,j,k-1,bi,bj)
134     & *rA(i,j,bi,bj)
135     ENDDO
136     ENDDO
137     DO j=1-OLy+1,sNy+OLy
138     DO i=1-OLx+1,sNx+OLx
139     dWtransU(i,j,bi,bj) = dWtransU(i,j,bi,bj)
140     & - rStarDhWDt(i,j,bi,bj)*drF(k-1)*h0FacW(i,j,k-1,bi,bj)
141     & *rAw(i,j,bi,bj)
142     dWtransV(i,j,bi,bj) = dWtransV(i,j,bi,bj)
143     & - rStarDhSDt(i,j,bi,bj)*drF(k-1)*h0FacS(i,j,k-1,bi,bj)
144     & *rAs(i,j,bi,bj)
145     ENDDO
146     ENDDO
147     C- Modify rTransU & rTransV :
148     DO j=1-OLy+1,sNy+OLy
149     DO i=1-OLx+1,sNx+OLx
150     rTransU(i,j) = rTransU(i,j)-dWtransU(i,j,bi,bj)
151     & + (dWtransC(i-1,j,bi,bj)+dWtransC(i,j,bi,bj))*0.5 _d 0
152     rTransV(i,j) = rTransV(i,j)-dWtransV(i,j,bi,bj)
153     & + (dWtransC(i,j-1,bi,bj)+dWtransC(i,j,bi,bj))*0.5 _d 0
154     ENDDO
155     ENDDO
156    
157     ENDIF
158    
159     ENDIF
160     #endif /* NONLIN_FRSURF */
161    
162     RETURN
163     END
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