/[MITgcm]/MITgcm/model/src/calc_gs.F
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revision 1.8 by cnh, Mon Jun 15 05:13:55 1998 UTC revision 1.17 by cnh, Fri Nov 6 22:44:44 1998 UTC
# Line 1  Line 1 
1  C $Header$  C $Header$
2    
3  #include "CPP_EEOPTIONS.h"  #include "CPP_OPTIONS.h"
4    
5  CStartOfInterFace  CStartOfInterFace
6        SUBROUTINE CALC_GS(        SUBROUTINE CALC_GS(
7       I           bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown,       I           bi,bj,iMin,iMax,jMin,jMax,k,kM1,kUp,kDown,
8       I           xA,yA,uTrans,vTrans,wTrans,maskup,       I           xA,yA,uTrans,vTrans,rTrans,maskup,maskC,
9       I           K13,K23,KappaZS,KapGM,       I           K13,K23,KappaRS,KapGM,
10       U           af,df,fZon,fMer,fVerS,       U           af,df,fZon,fMer,fVerS,
11       I           myThid )       I           myCurrentTime, myThid )
12  C     /==========================================================\  C     /==========================================================\
13  C     | SUBROUTINE CALC_GS                                       |  C     | SUBROUTINE CALC_GS                                       |
14  C     | o Calculate the salt tendency terms.                     |  C     | o Calculate the salt tendency terms.                     |
# Line 52  C               direction at the south f Line 52  C               direction at the south f
52  C     fVerS   - Flux of salt (S) in the vertical  C     fVerS   - Flux of salt (S) in the vertical
53  C               direction at the upper(U) and lower(D) faces of a cell.  C               direction at the upper(U) and lower(D) faces of a cell.
54  C     maskUp  - Land mask used to denote base of the domain.  C     maskUp  - Land mask used to denote base of the domain.
55    C     maskC   - Land mask for salt cells (used in TOP_LAYER only)
56  C     xA      - Tracer cell face area normal to X  C     xA      - Tracer cell face area normal to X
57  C     yA      - Tracer cell face area normal to X  C     yA      - Tracer cell face area normal to X
58  C     uTrans  - Zonal volume transport through cell face  C     uTrans  - Zonal volume transport through cell face
# Line 69  C     myThid - Instance number for this Line 70  C     myThid - Instance number for this
70        _RS yA    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RS yA    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
71        _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
72        _RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
73        _RL wTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL rTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
74        _RS maskUp(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RS maskUp(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
75        _RL K13   (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nz)        _RS maskC (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
76        _RL K23   (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nz)        _RL K13   (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
77        _RL KappaZS(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nz)        _RL K23   (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
78          _RL KappaRS(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
79        _RL KapGM (1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL KapGM (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
80        _RL af    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL af    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
81        _RL df    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL df    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
82        INTEGER k,kUp,kDown,kM1        INTEGER k,kUp,kDown,kM1
83        INTEGER bi,bj,iMin,iMax,jMin,jMax        INTEGER bi,bj,iMin,iMax,jMin,jMax
84        INTEGER myThid        INTEGER myThid
85          _RL     myCurrentTime
86  CEndOfInterface  CEndOfInterface
87    
88  C     == Local variables ==  C     == Local variables ==
# Line 107  C     Advective component of zonal flux Line 110  C     Advective component of zonal flux
110  C     Zonal tracer gradient  C     Zonal tracer gradient
111        DO j=jMin,jMax        DO j=jMin,jMax
112         DO i=iMin,iMax         DO i=iMin,iMax
113          dSdx(i,j) = _rdxC(i,j,bi,bj)*          dSdx(i,j) = _recip_dxC(i,j,bi,bj)*
114       &  (salt(i,j,k,bi,bj)-salt(i-1,j,k,bi,bj))       &  (salt(i,j,k,bi,bj)-salt(i-1,j,k,bi,bj))
115         ENDDO         ENDDO
116        ENDDO        ENDDO
# Line 137  C       Advective component of meridiona Line 140  C       Advective component of meridiona
140  C     Zonal tracer gradient  C     Zonal tracer gradient
141        DO j=jMin,jMax        DO j=jMin,jMax
142         DO i=iMin,iMax         DO i=iMin,iMax
143          dSdy(i,j) = _rdyC(i,j,bi,bj)*          dSdy(i,j) = _recip_dyC(i,j,bi,bj)*
144       &  (salt(i,j,k,bi,bj)-salt(i,j-1,k,bi,bj))       &  (salt(i,j,k,bi,bj)-salt(i,j-1,k,bi,bj))
145         ENDDO         ENDDO
146        ENDDO        ENDDO
# Line 159  C--   Interpolate terms for Redi/GM sche Line 162  C--   Interpolate terms for Redi/GM sche
162        DO j=jMin,jMax        DO j=jMin,jMax
163         DO i=iMin,iMax         DO i=iMin,iMax
164          dSdx(i,j) = 0.5*(          dSdx(i,j) = 0.5*(
165       &   +0.5*(_maskW(i+1,j,k,bi,bj)*_rdxC(i+1,j,bi,bj)*       &   +0.5*(_maskW(i+1,j,k,bi,bj)
166         &         *_recip_dxC(i+1,j,bi,bj)*
167       &           (salt(i+1,j,k,bi,bj)-salt(i,j,k,bi,bj))       &           (salt(i+1,j,k,bi,bj)-salt(i,j,k,bi,bj))
168       &        +_maskW(i,j,k,bi,bj)*_rdxC(i,j,bi,bj)*       &        +_maskW(i,j,k,bi,bj)
169         &         *_recip_dxC(i,j,bi,bj)*
170       &           (salt(i,j,k,bi,bj)-salt(i-1,j,k,bi,bj)))       &           (salt(i,j,k,bi,bj)-salt(i-1,j,k,bi,bj)))
171       &   +0.5*(_maskW(i+1,j,km1,bi,bj)*_rdxC(i+1,j,bi,bj)*       &   +0.5*(_maskW(i+1,j,km1,bi,bj)
172         &         *_recip_dxC(i+1,j,bi,bj)*
173       &           (salt(i+1,j,km1,bi,bj)-salt(i,j,km1,bi,bj))       &           (salt(i+1,j,km1,bi,bj)-salt(i,j,km1,bi,bj))
174       &        +_maskW(i,j,km1,bi,bj)*_rdxC(i,j,bi,bj)*       &        +_maskW(i,j,km1,bi,bj)
175         &         *_recip_dxC(i,j,bi,bj)*
176       &           (salt(i,j,km1,bi,bj)-salt(i-1,j,km1,bi,bj)))       &           (salt(i,j,km1,bi,bj)-salt(i-1,j,km1,bi,bj)))
177       &       )       &       )
178         ENDDO         ENDDO
# Line 173  C--   Interpolate terms for Redi/GM sche Line 180  C--   Interpolate terms for Redi/GM sche
180        DO j=jMin,jMax        DO j=jMin,jMax
181         DO i=iMin,iMax         DO i=iMin,iMax
182          dSdy(i,j) = 0.5*(          dSdy(i,j) = 0.5*(
183       &   +0.5*(_maskS(i,j,k,bi,bj)*_rdyC(i,j,bi,bj)*       &   +0.5*(_maskS(i,j,k,bi,bj)
184         &         *_recip_dyC(i,j,bi,bj)*
185       &           (salt(i,j,k,bi,bj)-salt(i,j-1,k,bi,bj))       &           (salt(i,j,k,bi,bj)-salt(i,j-1,k,bi,bj))
186       &        +_maskS(i,j+1,k,bi,bj)*_rdyC(i,j+1,bi,bj)*       &        +_maskS(i,j+1,k,bi,bj)
187         &         *_recip_dyC(i,j+1,bi,bj)*
188       &           (salt(i,j+1,k,bi,bj)-salt(i,j,k,bi,bj)))       &           (salt(i,j+1,k,bi,bj)-salt(i,j,k,bi,bj)))
189       &   +0.5*(_maskS(i,j,km1,bi,bj)*_rdyC(i,j,bi,bj)*       &   +0.5*(_maskS(i,j,km1,bi,bj)
190         &         *_recip_dyC(i,j,bi,bj)*
191       &           (salt(i,j,km1,bi,bj)-salt(i,j-1,km1,bi,bj))       &           (salt(i,j,km1,bi,bj)-salt(i,j-1,km1,bi,bj))
192       &        +_maskS(i,j+1,km1,bi,bj)*_rdyC(i,j+1,bi,bj)*       &        +_maskS(i,j+1,km1,bi,bj)
193         &         *_recip_dyC(i,j+1,bi,bj)*
194       &           (salt(i,j+1,km1,bi,bj)-salt(i,j,km1,bi,bj)))       &           (salt(i,j+1,km1,bi,bj)-salt(i,j,km1,bi,bj)))
195       &       )       &       )
196         ENDDO         ENDDO
# Line 192  C     (this plays the role of the free-s Line 203  C     (this plays the role of the free-s
203        DO j=jMin,jMax        DO j=jMin,jMax
204         DO i=iMin,iMax         DO i=iMin,iMax
205          af(i,j) =          af(i,j) =
206       &   wTrans(i,j)*(salt(i,j,k,bi,bj)+salt(i,j,kM1,bi,bj))*0.5 _d 0       &   rTrans(i,j)*(salt(i,j,k,bi,bj)+salt(i,j,kM1,bi,bj))*0.5 _d 0
207         ENDDO         ENDDO
208        ENDDO        ENDDO
209  C     Diffusive component of vertical flux  C     Diffusive component of vertical flux
# Line 200  C     Note: For K=1 then KM1=1 this give Line 211  C     Note: For K=1 then KM1=1 this give
211  C           boundary condition.  C           boundary condition.
212        DO j=jMin,jMax        DO j=jMin,jMax
213         DO i=iMin,iMax         DO i=iMin,iMax
214          df(i,j) = _zA(i,j,bi,bj)*(          df(i,j) = _rA(i,j,bi,bj)*(
215       &   -KapGM(i,j)*K13(i,j,k)*dSdx(i,j)       &   -KapGM(i,j)*K13(i,j,k)*dSdx(i,j)
216       &   -KapGM(i,j)*K23(i,j,k)*dSdy(i,j)       &   -KapGM(i,j)*K23(i,j,k)*dSdy(i,j)
217       &   )       &   )
# Line 209  C           boundary condition. Line 220  C           boundary condition.
220        IF (.NOT.implicitDiffusion) THEN        IF (.NOT.implicitDiffusion) THEN
221         DO j=jMin,jMax         DO j=jMin,jMax
222          DO i=iMin,iMax          DO i=iMin,iMax
223           df(i,j) = df(i,j) + _zA(i,j,bi,bj)*(           df(i,j) = df(i,j) + _rA(i,j,bi,bj)*(
224       &    -KappaZS(i,j,k)*rdzC(k)       &    -KappaRS(i,j,k)*recip_drC(k)
225       &    *(salt(i,j,kM1,bi,bj)-salt(i,j,k,bi,bj))       &    *(salt(i,j,kM1,bi,bj)-salt(i,j,k,bi,bj))*rkFac
226       &    )       &    )
227          ENDDO          ENDDO
228         ENDDO         ENDDO
# Line 238  C           they are not algorithmically Line 249  C           they are not algorithmically
249  C           are not used.  C           are not used.
250        DO j=jMin,jMax        DO j=jMin,jMax
251         DO i=iMin,iMax         DO i=iMin,iMax
252  C    &   -_rhFacC(i,j,k,bi,bj)*rdzF(k)*_rdxF(i,j,bi,bj)*_rdyF(i,j,bi,bj)  #define _recip_VolS1(i,j,k,bi,bj) _recip_hFacC(i,j,k,bi,bj)*recip_drF(k)
253  C    &   -_rhFacC(i,j,k,bi,bj)*rdzF(k)/_zA(i,j,bi,bj)  #define _recip_VolS2(i,j,k,bi,bj) /_rA(i,j,bi,bj)
 C #define _rVolS(i,j,k,bi,bj) _rhFacC(i,j,k,bi,bj)*rdzF(k)*_rdxF(i,j,bi,bj)*_rdyF(i,j,bi,bj)  
 #define _rVolS(i,j,k,bi,bj) _rhFacC(i,j,k,bi,bj)*rdzF(k)/_zA(i,j,bi,bj)  
254          gS(i,j,k,bi,bj)=          gS(i,j,k,bi,bj)=
255       &   -_rVolS(i,j,k,bi,bj)       &   -_recip_VolS1(i,j,k,bi,bj)
256         &    _recip_VolS2(i,j,k,bi,bj)
257       &   *(       &   *(
258       &    +( fZon(i+1,j)-fZon(i,j) )       &    +( fZon(i+1,j)-fZon(i,j) )
259       &    +( fMer(i,j+1)-fMer(i,j) )       &    +( fMer(i,j+1)-fMer(i,j) )
260       &    +( fVerS(i,j,kUp)-fVerS(i,j,kDown) )       &    +( fVerS(i,j,kUp)-fVerS(i,j,kDown) )*rkFac
261       &    )       &    )
262         ENDDO         ENDDO
263        ENDDO        ENDDO
264    
265  C--   External P-E forcing term(s)  C--   External forcing term(s)
266  C     o Surface relaxation term        CALL EXTERNAL_FORCING_S(
267        IF ( TOP_LAYER ) THEN       I     iMin,iMax,jMin,jMax,bi,bj,k,
268         DO j=jMin,jMax       I     maskC,
269          DO i=iMin,iMax       I     myCurrentTime,myThid)
270           gS(i,j,k,bi,bj)=gS(i,j,k,bi,bj)  
271       &   -lambdaSaltClimRelax*(salt(i,j,k,bi,bj)-saltClim(i,j,k,bi,bj))  #ifdef INCLUDE_LAT_CIRC_FFT_FILTER_CODE
272          ENDDO  C--
273         ENDDO        CALL FILTER_LATCIRCS_FFT_APPLY( gS, 1, sNy, k, k, bi, bj, 1, myThid)
274        ENDIF  #endif
   
275    
276        RETURN        RETURN
277        END        END
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