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revision 1.80 by adcroft, Fri Aug 17 18:40:30 2001 UTC revision 1.91 by heimbach, Fri Nov 15 03:01:21 2002 UTC
# Line 3  C $Name$ Line 3  C $Name$
3    
4  #include "CPP_OPTIONS.h"  #include "CPP_OPTIONS.h"
5    
6    CBOP
7    C     !ROUTINE: DYNAMICS
8    C     !INTERFACE:
9        SUBROUTINE DYNAMICS(myTime, myIter, myThid)        SUBROUTINE DYNAMICS(myTime, myIter, myThid)
10  C     /==========================================================\  C     !DESCRIPTION: \bv
11  C     | SUBROUTINE DYNAMICS                                      |  C     *==========================================================*
12  C     | o Controlling routine for the explicit part of the model |  C     | SUBROUTINE DYNAMICS                                      
13  C     |   dynamics.                                              |  C     | o Controlling routine for the explicit part of the model  
14  C     |==========================================================|  C     |   dynamics.                                              
15  C     | This routine evaluates the "dynamics" terms for each     |  C     *==========================================================*
16  C     | block of ocean in turn. Because the blocks of ocean have |  C     | This routine evaluates the "dynamics" terms for each      
17  C     | overlap regions they are independent of one another.     |  C     | block of ocean in turn. Because the blocks of ocean have  
18  C     | If terms involving lateral integrals are needed in this  |  C     | overlap regions they are independent of one another.      
19  C     | routine care will be needed. Similarly finite-difference |  C     | If terms involving lateral integrals are needed in this  
20  C     | operations with stencils wider than the overlap region   |  C     | routine care will be needed. Similarly finite-difference  
21  C     | require special consideration.                           |  C     | operations with stencils wider than the overlap region    
22  C     | Notes                                                    |  C     | require special consideration.                            
23  C     | =====                                                    |  C     | The algorithm...
24  C     | C*P* comments indicating place holders for which code is |  C     |
25  C     |      presently being developed.                          |  C     | "Correction Step"
26  C     \==========================================================/  C     | =================
27    C     | Here we update the horizontal velocities with the surface
28    C     | pressure such that the resulting flow is either consistent
29    C     | with the free-surface evolution or the rigid-lid:
30    C     |   U[n] = U* + dt x d/dx P
31    C     |   V[n] = V* + dt x d/dy P
32    C     |
33    C     | "Calculation of Gs"
34    C     | ===================
35    C     | This is where all the accelerations and tendencies (ie.
36    C     | physics, parameterizations etc...) are calculated
37    C     |   rho = rho ( theta[n], salt[n] )
38    C     |   b   = b(rho, theta)
39    C     |   K31 = K31 ( rho )
40    C     |   Gu[n] = Gu( u[n], v[n], wVel, b, ... )
41    C     |   Gv[n] = Gv( u[n], v[n], wVel, b, ... )
42    C     |   Gt[n] = Gt( theta[n], u[n], v[n], wVel, K31, ... )
43    C     |   Gs[n] = Gs( salt[n], u[n], v[n], wVel, K31, ... )
44    C     |
45    C     | "Time-stepping" or "Prediction"
46    C     | ================================
47    C     | The models variables are stepped forward with the appropriate
48    C     | time-stepping scheme (currently we use Adams-Bashforth II)
49    C     | - For momentum, the result is always *only* a "prediction"
50    C     | in that the flow may be divergent and will be "corrected"
51    C     | later with a surface pressure gradient.
52    C     | - Normally for tracers the result is the new field at time
53    C     | level [n+1} *BUT* in the case of implicit diffusion the result
54    C     | is also *only* a prediction.
55    C     | - We denote "predictors" with an asterisk (*).
56    C     |   U* = U[n] + dt x ( 3/2 Gu[n] - 1/2 Gu[n-1] )
57    C     |   V* = V[n] + dt x ( 3/2 Gv[n] - 1/2 Gv[n-1] )
58    C     |   theta[n+1] = theta[n] + dt x ( 3/2 Gt[n] - 1/2 atG[n-1] )
59    C     |   salt[n+1] = salt[n] + dt x ( 3/2 Gt[n] - 1/2 atG[n-1] )
60    C     | With implicit diffusion:
61    C     |   theta* = theta[n] + dt x ( 3/2 Gt[n] - 1/2 atG[n-1] )
62    C     |   salt* = salt[n] + dt x ( 3/2 Gt[n] - 1/2 atG[n-1] )
63    C     |   (1 + dt * K * d_zz) theta[n] = theta*
64    C     |   (1 + dt * K * d_zz) salt[n] = salt*
65    C     |
66    C     *==========================================================*
67    C     \ev
68    C     !USES:
69        IMPLICIT NONE        IMPLICIT NONE
   
70  C     == Global variables ===  C     == Global variables ===
71  #include "SIZE.h"  #include "SIZE.h"
72  #include "EEPARAMS.h"  #include "EEPARAMS.h"
# Line 32  C     == Global variables === Line 76  C     == Global variables ===
76  #ifdef ALLOW_PASSIVE_TRACER  #ifdef ALLOW_PASSIVE_TRACER
77  #include "TR1.h"  #include "TR1.h"
78  #endif  #endif
   
79  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
80  # include "tamc.h"  # include "tamc.h"
81  # include "tamc_keys.h"  # include "tamc_keys.h"
82  # include "FFIELDS.h"  # include "FFIELDS.h"
83    # include "EOS.h"
84  # ifdef ALLOW_KPP  # ifdef ALLOW_KPP
85  #  include "KPP.h"  #  include "KPP.h"
86  # endif  # endif
 # ifdef ALLOW_GMREDI  
 #  include "GMREDI.h"  
 # endif  
87  #endif /* ALLOW_AUTODIFF_TAMC */  #endif /* ALLOW_AUTODIFF_TAMC */
   
88  #ifdef ALLOW_TIMEAVE  #ifdef ALLOW_TIMEAVE
89  #include "TIMEAVE_STATV.h"  #include "TIMEAVE_STATV.h"
90  #endif  #endif
91    
92    C     !CALLING SEQUENCE:
93    C     DYNAMICS()
94    C      |
95    C      |-- CALC_GRAD_PHI_SURF
96    C      |
97    C      |-- CALC_VISCOSITY
98    C      |
99    C      |-- CALC_PHI_HYD  
100    C      |
101    C      |-- STORE_PRESSURE
102    C      |
103    C      |-- MOM_FLUXFORM  
104    C      |
105    C      |-- MOM_VECINV    
106    C      |
107    C      |-- TIMESTEP      
108    C      |
109    C      |-- OBCS_APPLY_UV
110    C      |
111    C      |-- IMPLDIFF      
112    C      |
113    C      |-- OBCS_APPLY_UV
114    C      |
115    C      |-- CALL TIMEAVE_CUMUL_1T
116    C      |-- CALL DEBUG_STATS_RL
117    
118    C     !INPUT/OUTPUT PARAMETERS:
119  C     == Routine arguments ==  C     == Routine arguments ==
120  C     myTime - Current time in simulation  C     myTime - Current time in simulation
121  C     myIter - Current iteration number in simulation  C     myIter - Current iteration number in simulation
# Line 57  C     myThid - Thread number for this in Line 124  C     myThid - Thread number for this in
124        INTEGER myIter        INTEGER myIter
125        INTEGER myThid        INTEGER myThid
126    
127    C     !LOCAL VARIABLES:
128  C     == Local variables  C     == Local variables
129  C     fVer[STUV]               o fVer: Vertical flux term - note fVer  C     fVer[STUV]               o fVer: Vertical flux term - note fVer
130  C                                      is "pipelined" in the vertical  C                                      is "pipelined" in the vertical
# Line 85  C                      index into fVerTe Line 153  C                      index into fVerTe
153        _RL phiSurfY(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL phiSurfY(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
154        _RL KappaRU (1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)        _RL KappaRU (1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
155        _RL KappaRV (1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)        _RL KappaRV (1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr)
       _RL sigmaX  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)  
       _RL sigmaY  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)  
       _RL sigmaR  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)  
   
 C This is currently used by IVDC and Diagnostics  
       _RL ConvectCount (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)  
156    
157        INTEGER iMin, iMax        INTEGER iMin, iMax
158        INTEGER jMin, jMax        INTEGER jMin, jMax
# Line 99  C This is currently used by IVDC and Dia Line 161  C This is currently used by IVDC and Dia
161        INTEGER k, km1, kp1, kup, kDown        INTEGER k, km1, kp1, kup, kDown
162    
163  Cjmc : add for phiHyd output <- but not working if multi tile per CPU  Cjmc : add for phiHyd output <- but not working if multi tile per CPU
164  c     CHARACTER*(MAX_LEN_MBUF) suff  c      CHARACTER*(MAX_LEN_MBUF) suff
165  c     LOGICAL  DIFFERENT_MULTIPLE  c      LOGICAL  DIFFERENT_MULTIPLE
166  c     EXTERNAL DIFFERENT_MULTIPLE  c      EXTERNAL DIFFERENT_MULTIPLE
167  Cjmc(end)  Cjmc(end)
168    
169  C---    The algorithm...  C---    The algorithm...
# Line 147  C         salt* = salt[n] + dt x ( 3/2 G Line 209  C         salt* = salt[n] + dt x ( 3/2 G
209  C         (1 + dt * K * d_zz) theta[n] = theta*  C         (1 + dt * K * d_zz) theta[n] = theta*
210  C         (1 + dt * K * d_zz) salt[n] = salt*  C         (1 + dt * K * d_zz) salt[n] = salt*
211  C---  C---
212    CEOP
213    
214  C--   Set up work arrays with valid (i.e. not NaN) values  C--   Set up work arrays with valid (i.e. not NaN) values
215  C     These inital values do not alter the numerical results. They  C     These inital values do not alter the numerical results. They
# Line 155  C     point numbers. This prevents spuri Line 218  C     point numbers. This prevents spuri
218  C     uninitialised but inert locations.  C     uninitialised but inert locations.
219        DO j=1-OLy,sNy+OLy        DO j=1-OLy,sNy+OLy
220         DO i=1-OLx,sNx+OLx         DO i=1-OLx,sNx+OLx
         DO k=1,Nr  
          phiHyd(i,j,k)  = 0. _d 0  
          KappaRU(i,j,k) = 0. _d 0  
          KappaRV(i,j,k) = 0. _d 0  
          sigmaX(i,j,k) = 0. _d 0  
          sigmaY(i,j,k) = 0. _d 0  
          sigmaR(i,j,k) = 0. _d 0  
         ENDDO  
221          rhoKM1 (i,j) = 0. _d 0          rhoKM1 (i,j) = 0. _d 0
222          rhok   (i,j) = 0. _d 0          rhok   (i,j) = 0. _d 0
223          phiSurfX(i,j) = 0. _d 0          phiSurfX(i,j) = 0. _d 0
# Line 170  C     uninitialised but inert locations. Line 225  C     uninitialised but inert locations.
225         ENDDO         ENDDO
226        ENDDO        ENDDO
227    
228    C-- Call to routine for calculation of
229    C   Eliassen-Palm-flux-forced U-tendency,
230    C   if desired:
231    #ifdef INCLUDE_EP_FORCING_CODE
232          CALL CALC_EP_FORCING(myThid)
233    #endif
234    
235  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
236  C--   HPF directive to help TAMC  C--   HPF directive to help TAMC
237  CHPF$ INDEPENDENT  CHPF$ INDEPENDENT
# Line 190  CHPF$&                  ) Line 252  CHPF$&                  )
252  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
253            act1 = bi - myBxLo(myThid)            act1 = bi - myBxLo(myThid)
254            max1 = myBxHi(myThid) - myBxLo(myThid) + 1            max1 = myBxHi(myThid) - myBxLo(myThid) + 1
   
255            act2 = bj - myByLo(myThid)            act2 = bj - myByLo(myThid)
256            max2 = myByHi(myThid) - myByLo(myThid) + 1            max2 = myByHi(myThid) - myByLo(myThid) + 1
   
257            act3 = myThid - 1            act3 = myThid - 1
258            max3 = nTx*nTy            max3 = nTx*nTy
   
259            act4 = ikey_dynamics - 1            act4 = ikey_dynamics - 1
260              idynkey = (act1 + 1) + act2*max1
           ikey = (act1 + 1) + act2*max1  
261       &                      + act3*max1*max2       &                      + act3*max1*max2
262       &                      + act4*max1*max2*max3       &                      + act4*max1*max2*max3
263  #endif /* ALLOW_AUTODIFF_TAMC */  #endif /* ALLOW_AUTODIFF_TAMC */
# Line 207  CHPF$&                  ) Line 265  CHPF$&                  )
265  C--     Set up work arrays that need valid initial values  C--     Set up work arrays that need valid initial values
266          DO j=1-OLy,sNy+OLy          DO j=1-OLy,sNy+OLy
267           DO i=1-OLx,sNx+OLx           DO i=1-OLx,sNx+OLx
268              DO k=1,Nr
269               phiHyd(i,j,k)  = 0. _d 0
270               KappaRU(i,j,k) = 0. _d 0
271               KappaRV(i,j,k) = 0. _d 0
272              ENDDO
273            fVerU  (i,j,1) = 0. _d 0            fVerU  (i,j,1) = 0. _d 0
274            fVerU  (i,j,2) = 0. _d 0            fVerU  (i,j,2) = 0. _d 0
275            fVerV  (i,j,1) = 0. _d 0            fVerV  (i,j,1) = 0. _d 0
# Line 221  C--     Start computation of dynamics Line 284  C--     Start computation of dynamics
284          jMax = sNy+OLy-1          jMax = sNy+OLy-1
285    
286  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
287  CADJ STORE uvel (:,:,:,bi,bj) = comlev1_bibj, key = ikey, byte = isbyte  CADJ STORE wvel (:,:,:,bi,bj) =
288  CADJ STORE vvel (:,:,:,bi,bj) = comlev1_bibj, key = ikey, byte = isbyte  CADJ &     comlev1_bibj, key = idynkey, byte = isbyte
 CADJ STORE wvel (:,:,:,bi,bj) = comlev1_bibj, key = ikey, byte = isbyte  
289  #endif /* ALLOW_AUTODIFF_TAMC */  #endif /* ALLOW_AUTODIFF_TAMC */
290    
291  C--     Explicit part of the Surface Potentiel Gradient (add in TIMESTEP)  C--     Explicit part of the Surface Potentiel Gradient (add in TIMESTEP)
# Line 236  C       (note: this loop will be replace Line 298  C       (note: this loop will be replace
298       I         myThid )                               I         myThid )                        
299          ENDIF          ENDIF
300    
301    #ifdef ALLOW_AUTODIFF_TAMC
302    CADJ STORE uvel (:,:,:,bi,bj) = comlev1_bibj, key=idynkey, byte=isbyte
303    CADJ STORE vvel (:,:,:,bi,bj) = comlev1_bibj, key=idynkey, byte=isbyte
304    #ifdef ALLOW_KPP
305    CADJ STORE KPPviscAz (:,:,:,bi,bj)
306    CADJ &                 = comlev1_bibj, key=idynkey, byte=isbyte
307    #endif /* ALLOW_KPP */
308    #endif /* ALLOW_AUTODIFF_TAMC */
309    
310  #ifdef  INCLUDE_CALC_DIFFUSIVITY_CALL  #ifdef  INCLUDE_CALC_DIFFUSIVITY_CALL
311  C--      Calculate the total vertical diffusivity  C--      Calculate the total vertical diffusivity
312          DO k=1,Nr          DO k=1,Nr
# Line 259  C--       kDown  Cycles through 2,1 to p Line 330  C--       kDown  Cycles through 2,1 to p
330            kDown= 1+MOD(k,2)            kDown= 1+MOD(k,2)
331    
332  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
333           kkey = (ikey-1)*Nr + k           kkey = (idynkey-1)*Nr + k
334    CADJ STORE pressure(:,:,k,bi,bj) = comlev1_bibj_k ,
335    CADJ &     key=kkey , byte=isbyte
336  #endif /* ALLOW_AUTODIFF_TAMC */  #endif /* ALLOW_AUTODIFF_TAMC */
337    
338  C--      Integrate hydrostatic balance for phiHyd with BC of  C--      Integrate hydrostatic balance for phiHyd with BC of
# Line 268  C        distinguishe between Stagger an Line 341  C        distinguishe between Stagger an
341           IF (staggerTimeStep) THEN           IF (staggerTimeStep) THEN
342             CALL CALC_PHI_HYD(             CALL CALC_PHI_HYD(
343       I        bi,bj,iMin,iMax,jMin,jMax,k,       I        bi,bj,iMin,iMax,jMin,jMax,k,
344       I        gTnm1, gSnm1,       I        gT, gS,
345       U        phiHyd,       U        phiHyd,
346       I        myThid )       I        myThid )
347           ELSE           ELSE
# Line 279  C        distinguishe between Stagger an Line 352  C        distinguishe between Stagger an
352       I        myThid )       I        myThid )
353           ENDIF           ENDIF
354    
355    C        calculate pressure from phiHyd and store it on common block
356    C        variable pressure
357             CALL STORE_PRESSURE( bi, bj, k, phiHyd, myThid )
358    
359  C--      Calculate accelerations in the momentum equations (gU, gV, ...)  C--      Calculate accelerations in the momentum equations (gU, gV, ...)
360  C        and step forward storing the result in gUnm1, gVnm1, etc...  C        and step forward storing the result in gUnm1, gVnm1, etc...
361           IF ( momStepping ) THEN           IF ( momStepping ) THEN
# Line 325  C--      Apply open boundary conditions Line 402  C--      Apply open boundary conditions
402  C--     end of dynamics k loop (1:Nr)  C--     end of dynamics k loop (1:Nr)
403          ENDDO          ENDDO
404    
   
   
405  C--     Implicit viscosity  C--     Implicit viscosity
406          IF (implicitViscosity.AND.momStepping) THEN          IF (implicitViscosity.AND.momStepping) THEN
407  #ifdef    ALLOW_AUTODIFF_TAMC  #ifdef    ALLOW_AUTODIFF_TAMC
408            idkey = iikey + 3  CADJ STORE gUNm1(:,:,:,bi,bj) = comlev1_bibj , key=idynkey, byte=isbyte
 CADJ STORE gUNm1(:,:,:,bi,bj) = comlev1_bibj , key=ikey, byte=isbyte  
409  #endif    /* ALLOW_AUTODIFF_TAMC */  #endif    /* ALLOW_AUTODIFF_TAMC */
410            CALL IMPLDIFF(            CALL IMPLDIFF(
411       I         bi, bj, iMin, iMax, jMin, jMax,       I         bi, bj, iMin, iMax, jMin, jMax,
# Line 339  CADJ STORE gUNm1(:,:,:,bi,bj) = comlev1_ Line 413  CADJ STORE gUNm1(:,:,:,bi,bj) = comlev1_
413       U         gUNm1,       U         gUNm1,
414       I         myThid )       I         myThid )
415  #ifdef    ALLOW_AUTODIFF_TAMC  #ifdef    ALLOW_AUTODIFF_TAMC
416            idkey = iikey + 4  CADJ STORE gVNm1(:,:,:,bi,bj) = comlev1_bibj , key=idynkey, byte=isbyte
 CADJ STORE gVNm1(:,:,:,bi,bj) = comlev1_bibj , key=ikey, byte=isbyte  
417  #endif    /* ALLOW_AUTODIFF_TAMC */  #endif    /* ALLOW_AUTODIFF_TAMC */
418            CALL IMPLDIFF(            CALL IMPLDIFF(
419       I         bi, bj, iMin, iMax, jMin, jMax,       I         bi, bj, iMin, iMax, jMin, jMax,
# Line 359  C--      Apply open boundary conditions Line 432  C--      Apply open boundary conditions
432    
433  #ifdef    INCLUDE_CD_CODE  #ifdef    INCLUDE_CD_CODE
434  #ifdef    ALLOW_AUTODIFF_TAMC  #ifdef    ALLOW_AUTODIFF_TAMC
435            idkey = iikey + 5  CADJ STORE vVelD(:,:,:,bi,bj) = comlev1_bibj , key=idynkey, byte=isbyte
 CADJ STORE vVelD(:,:,:,bi,bj) = comlev1_bibj , key=ikey, byte=isbyte  
436  #endif    /* ALLOW_AUTODIFF_TAMC */  #endif    /* ALLOW_AUTODIFF_TAMC */
437            CALL IMPLDIFF(            CALL IMPLDIFF(
438       I         bi, bj, iMin, iMax, jMin, jMax,       I         bi, bj, iMin, iMax, jMin, jMax,
# Line 368  CADJ STORE vVelD(:,:,:,bi,bj) = comlev1_ Line 440  CADJ STORE vVelD(:,:,:,bi,bj) = comlev1_
440       U         vVelD,       U         vVelD,
441       I         myThid )       I         myThid )
442  #ifdef    ALLOW_AUTODIFF_TAMC  #ifdef    ALLOW_AUTODIFF_TAMC
443            idkey = iikey + 6  CADJ STORE uVelD(:,:,:,bi,bj) = comlev1_bibj , key=idynkey, byte=isbyte
 CADJ STORE uVelD(:,:,:,bi,bj) = comlev1_bibj , key=ikey, byte=isbyte  
444  #endif    /* ALLOW_AUTODIFF_TAMC */  #endif    /* ALLOW_AUTODIFF_TAMC */
445            CALL IMPLDIFF(            CALL IMPLDIFF(
446       I         bi, bj, iMin, iMax, jMin, jMax,       I         bi, bj, iMin, iMax, jMin, jMax,
# Line 381  C--     End If implicitViscosity.AND.mom Line 452  C--     End If implicitViscosity.AND.mom
452          ENDIF          ENDIF
453    
454  Cjmc : add for phiHyd output <- but not working if multi tile per CPU  Cjmc : add for phiHyd output <- but not working if multi tile per CPU
455  c       IF ( DIFFERENT_MULTIPLE(dumpFreq,myTime+deltaTClock,myTime)  c        IF ( DIFFERENT_MULTIPLE(dumpFreq,myTime+deltaTClock,myTime)
456  c    &  .AND. buoyancyRelation .eq. 'ATMOSPHERIC' ) THEN  c     &       .AND. buoyancyRelation .ne. 'OCEANIC' ) THEN
457  c         WRITE(suff,'(I10.10)') myIter+1  c           WRITE(suff,'(I10.10)') myIter+1
458  c         CALL WRITE_FLD_XYZ_RL('PH.',suff,phiHyd,myIter+1,myThid)  c           CALL WRITE_FLD_XYZ_RL('PH.',suff,phiHyd,myIter+1,myThid)
459  c       ENDIF  c        ENDIF
460  Cjmc(end)  Cjmc(end)
461    
462  #ifdef ALLOW_TIMEAVE  #ifdef ALLOW_TIMEAVE
463          IF (taveFreq.GT.0.) THEN          IF (taveFreq.GT.0.) THEN
464            CALL TIMEAVE_CUMUL_1T(phiHydtave, phiHyd, Nr,            CALL TIMEAVE_CUMUL_1T(phiHydtave, phiHyd, Nr,
465       I                              deltaTclock, bi, bj, myThid)       I                              deltaTclock, bi, bj, myThid)
           IF (ivdc_kappa.NE.0.) THEN  
             CALL TIMEAVE_CUMULATE(ConvectCountTave, ConvectCount, Nr,  
      I                              deltaTclock, bi, bj, myThid)  
           ENDIF  
466          ENDIF          ENDIF
467  #endif /* ALLOW_TIMEAVE */  #endif /* ALLOW_TIMEAVE */
468    
469         ENDDO         ENDDO
470        ENDDO        ENDDO
471    
472    Cml(
473    C     In order to compare the variance of phiHydLow of a p/z-coordinate
474    C     run with etaH of a z/p-coordinate run the drift of phiHydLow
475    C     has to be removed by something like the following subroutine:
476    C      CALL REMOVE_MEAN_RL( 1, phiHydLow, maskH, maskH, rA, drF,
477    C     &                'phiHydLow', myThid )
478    Cml)
479    
480  #ifndef DISABLE_DEBUGMODE  #ifndef DISABLE_DEBUGMODE
481        If (debugMode) THEN        If (debugMode) THEN
482         CALL DEBUG_STATS_RL(1,EtaN,'EtaN (DYNAMICS)',myThid)         CALL DEBUG_STATS_RL(1,EtaN,'EtaN (DYNAMICS)',myThid)

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