/[MITgcm]/MITgcm/model/src/forward_step.F
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revision 1.32 by heimbach, Thu May 30 02:32:14 2002 UTC revision 1.83 by molod, Mon Feb 23 22:54:54 2004 UTC
# Line 1  Line 1 
1  C $Header$  C $eader: /u/u3/gcmpack/MITgcm/model/src/forward_step.F,v 1.79 2003/12/15 23:00:44 molod Exp $
2  C $Name$  C $Name$
3    
4    #include "PACKAGES_CONFIG.h"
5  #include "CPP_OPTIONS.h"  #include "CPP_OPTIONS.h"
6    
7    cswdptr -- add --
8    #ifdef ALLOW_GCHEM
9    # include "GCHEM_OPTIONS.h"
10    #endif
11    cswdptr -- end add ---
12    
13  CBOP  CBOP
14  C     !ROUTINE: FORWARD_STEP  C     !ROUTINE: FORWARD_STEP
15  C     !INTERFACE:  C     !INTERFACE:
# Line 49  C     == Global variables == Line 56  C     == Global variables ==
56  # include "ctrl.h"  # include "ctrl.h"
57  # include "ctrl_dummy.h"  # include "ctrl_dummy.h"
58  # include "cost.h"  # include "cost.h"
59  # ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE  # include "EOS.h"
60    # ifdef ALLOW_EXF
61  #  include "exf_fields.h"  #  include "exf_fields.h"
62  #  ifdef ALLOW_BULKFORMULAE  #  ifdef ALLOW_BULKFORMULAE
63  #   include "exf_constants.h"  #   include "exf_constants.h"
# Line 58  C     == Global variables == Line 66  C     == Global variables ==
66  # ifdef ALLOW_OBCS  # ifdef ALLOW_OBCS
67  #  include "OBCS.h"  #  include "OBCS.h"
68  # endif  # endif
69  #endif  # ifdef ALLOW_PTRACERS
70    #  include "PTRACERS.h"
71    # endif
72    # ifdef ALLOW_CD_CODE
73    #  include "CD_CODE_VARS.h"
74    # endif
75    #endif /* ALLOW_AUTODIFF_TAMC */
76    
77  C     !LOCAL VARIABLES:  C     !LOCAL VARIABLES:
78  C     == Routine arguments ==  C     == Routine arguments ==
# Line 74  C     mythid - thread number for this in Line 88  C     mythid - thread number for this in
88        integer mythid        integer mythid
89        integer myiter        integer myiter
90        _RL     mytime        _RL     mytime
       INTEGER bi,bj  
91    
92          integer i,L
93  CEOP  CEOP
94    
95    #ifdef ALLOW_DEBUG
96          IF ( debugLevel .GE. debLevB )
97         &    CALL DEBUG_ENTER('FORWARD_STEP',myThid)
98    #endif
99    
100  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
101  C--     Reset the model iteration counter and the model time.  C--   Reset the model iteration counter and the model time.
102          myiter = nIter0 + (iloop-1)        myiter = nIter0 + (iloop-1)
103          mytime = startTime + float(iloop-1)*deltaTclock        mytime = startTime + float(iloop-1)*deltaTclock
104  #endif  #endif
105    
106  #if (defined (ALLOW_AUTODIFF_TAMC) && defined (ALLOW_AUTODIFF_MONITOR))  #if (defined (ALLOW_AUTODIFF_TAMC) && defined (ALLOW_AUTODIFF_MONITOR))
107  C       Include call to a dummy routine. Its adjoint will be  C     Include call to a dummy routine. Its adjoint will be
108  C       called at the proper place in the adjoint code.  C     called at the proper place in the adjoint code.
109  C       The adjoint routine will print out adjoint values  C     The adjoint routine will print out adjoint values
110  C       if requested. The location of the call is important,  C     if requested. The location of the call is important,
111  C       it has to be after the adjoint of the exchanges  C     it has to be after the adjoint of the exchanges
112  C       (DO_GTERM_BLOCKING_EXCHANGES).  C     (DO_GTERM_BLOCKING_EXCHANGES).
113          CALL DUMMY_IN_STEPPING( myTime, myIter, myThid )        CALL DUMMY_IN_STEPPING( myTime, myIter, myThid )
114          CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )  cph   I've commented this line since it may conflict with MITgcm's adjoint
115    cph   However, need to check whether that's still consistent
116    cph   with the ecco-branch (it should).
117    cph      CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )
118  #endif  #endif
119    
120  #ifdef EXACT_CONSERV  #ifdef EXACT_CONSERV
121        IF (exactConserv) THEN        IF (exactConserv) THEN
122  C--   Update etaH(n+1) :  C--   Update etaH(n+1) :
123          DO bj=myByLo(myThid),myByHi(myThid)           CALL TIMER_START('UPDATE_ETAH        [FORWARD_STEP]',mythid)
124           DO bi=myBxLo(myThid),myBxHi(myThid)           CALL UPDATE_ETAH( myTime, myIter, myThid )
125             CALL CALC_EXACT_ETA( .FALSE., bi,bj, uVel,vVel,           CALL TIMER_STOP ('UPDATE_ETAH        [FORWARD_STEP]',mythid)
      I                          myTime, myIter, myThid )  
          ENDDO  
         ENDDO  
         IF (implicDiv2Dflow .NE. 1. _d 0 .OR. useOBCS )  
      &     _EXCH_XY_R8(etaH, myThid )  
126        ENDIF        ENDIF
127  #endif /* EXACT_CONSERV */  #endif /* EXACT_CONSERV */
128    
129  #ifdef NONLIN_FRSURF  #ifdef NONLIN_FRSURF
130  C--   compute the future surface level thickness        IF ( select_rStar.NE.0 ) THEN
131  C      according to etaH(n+1)  C--   r* : compute the future level thickness according to etaH(n+1)
132          IF ( nonlinFreeSurf.GT.0) THEN            CALL TIMER_START('CALC_R_STAR       [FORWARD_STEP]',mythid)
133              CALL CALC_R_STAR(etaH, myTime, myIter, myThid )
134              CALL TIMER_STOP ('CALC_R_STAR       [FORWARD_STEP]',mythid)
135          ELSEIF ( nonlinFreeSurf.GT.0) THEN
136    C--   compute the future surface level thickness according to etaH(n+1)
137              CALL TIMER_START('CALC_SURF_DR      [FORWARD_STEP]',mythid)
138            CALL CALC_SURF_DR(etaH, myTime, myIter, myThid )            CALL CALC_SURF_DR(etaH, myTime, myIter, myThid )
139          ENDIF            CALL TIMER_STOP ('CALC_SURF_DR      [FORWARD_STEP]',mythid)
140          ENDIF
141  #endif /* NONLIN_FRSURF */  #endif /* NONLIN_FRSURF */
142    
 C--     Load forcing/external data fields.  
 #ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE  
 C       NOTE, that although the exf package is part of the  
 C       distribution, it is not currently maintained, i.e.  
 C       exf is disabled by default in genmake.  
143  #ifdef ALLOW_AUTODIFF_TAMC  #ifdef ALLOW_AUTODIFF_TAMC
144  c**************************************  c**************************************
145  #include "checkpoint_lev1_directives.h"  #include "checkpoint_lev1_directives.h"
146  c**************************************  c**************************************
147  #endif  #endif
148          CALL EXF_GETFORCING( mytime, myiter, mythid )  
149  #else  C--   Call external forcing package
150          CALL TIMER_START('EXTERNAL_FIELDS_LOAD[THE_MAIN_LOOP]',mythid)  #ifdef ALLOW_BULK_FORCE
151          CALL EXTERNAL_FIELDS_LOAD( mytime, myiter, mythid )        IF ( useBulkForce ) THEN
152          CALL TIMER_STOP ('EXTERNAL_FIELDS_LOAD[THE_MAIN_LOOP]',mythid)  #ifdef ALLOW_DEBUG
153           IF ( debugLevel .GE. debLevB )
154         &    CALL DEBUG_CALL('BULKF_FIELDS_LOAD',myThid)
155    #endif
156           CALL TIMER_START('BULKF_FORCING      [FORWARD_STEP]',mythid)
157    C-    load all forcing fields at current time
158           CALL BULKF_FIELDS_LOAD( myTime, myIter, myThid )
159    C-    calculate qnet and empmr (and wind stress)
160           CALL BULKF_FORCING( myTime, myIter, myThid )
161           CALL TIMER_STOP ('BULKF_FORCING      [FORWARD_STEP]',mythid)
162          ELSE
163    #endif /* ALLOW_BULK_FORCE */
164    
165    # ifdef ALLOW_EXF
166    #  ifdef ALLOW_DEBUG
167          IF ( debugLevel .GE. debLevB )
168         &    CALL DEBUG_CALL('EXF_GETFORCING',myThid)
169    #  endif
170          CALL TIMER_START('EXF_GETFORCING     [FORWARD_STEP]',mythid)
171          CALL EXF_GETFORCING( mytime, myiter, mythid )
172          CALL TIMER_STOP ('EXF_GETFORCING     [FORWARD_STEP]',mythid)
173    # else /* ALLOW_EXF undef */
174    cph The following IF-statement creates an additional dependency
175    cph for the forcing fields requiring additional storing.
176    cph Therefore, the IF-statement will be put between CPP-OPTIONS,
177    cph assuming that ALLOW_SEAICE has not yet been differentiated.
178    #  ifdef ALLOW_SEAICE
179          IF ( .NOT. useSEAICE ) THEN
180    #  endif
181    #ifdef ALLOW_DEBUG
182           IF ( debugLevel .GE. debLevB )
183         &    CALL DEBUG_CALL('EXTERNAL_FIELDS_LOAD',myThid)
184    #endif
185           CALL TIMER_START('EXTERNAL_FIELDS_LOAD[FORWARD_STEP]',mythid)
186           CALL EXTERNAL_FIELDS_LOAD( mytime, myiter, mythid )
187           CALL TIMER_STOP ('EXTERNAL_FIELDS_LOAD[FORWARD_STEP]',mythid)
188    #  ifdef ALLOW_SEAICE
189          ENDIF
190    #  endif
191    # endif /* ALLOW_EXF */
192    #ifdef ALLOW_BULK_FORCE
193    C--   end of if/else block useBulfforce --
194          ENDIF
195    #endif /* ALLOW_BULK_FORCE */
196    
197    #ifdef ALLOW_AUTODIFF
198    c--   Add control vector for forcing and parameter fields
199          if ( myiter .EQ. nIter0 )
200         &     CALL CTRL_MAP_FORCING (mythid)
201    #endif
202    
203    #ifdef ALLOW_THSICE
204          IF (useThSIce) THEN
205    #ifdef ALLOW_DEBUG
206            IF ( debugLevel .GE. debLevB )
207         &    CALL DEBUG_CALL('THSICE_MAIN',myThid)
208    #endif
209    C--     Step forward Therm.Sea-Ice variables
210    C       and modify forcing terms including effects from ice
211            CALL TIMER_START('THSICE_MAIN        [FORWARD_STEP]', myThid)
212            CALL THSICE_MAIN( myTime, myIter, myThid )
213            CALL TIMER_STOP( 'THSICE_MAIN        [FORWARD_STEP]', myThid)
214          ENDIF
215    #endif /* ALLOW_THSICE */
216    
217    # ifdef ALLOW_SEAICE
218    C--   Call sea ice model to compute forcing/external data fields.  In
219    C     addition to computing prognostic sea-ice variables and diagnosing the
220    C     forcing/external data fields that drive the ocean model, SEAICE_MODEL
221    C     also sets theta to the freezing point under sea-ice.  The implied
222    C     surface heat flux is then stored in variable surfaceTendencyTice,
223    C     which is needed by KPP package (kpp_calc.F and kpp_transport_t.F)
224    C     to diagnose surface buoyancy fluxes and for the non-local transport
225    C     term.  Because this call precedes model thermodynamics, temperature
226    C     under sea-ice may not be "exactly" at the freezing point by the time
227    C     theta is dumped or time-averaged.
228          IF ( useSEAICE ) THEN
229    #ifdef ALLOW_DEBUG
230             IF ( debugLevel .GE. debLevB )
231         &    CALL DEBUG_CALL('SEAICE_MODEL',myThid)
232    #endif
233             CALL TIMER_START('SEAICE_MODEL       [FORWARD_STEP]',myThid)
234             CALL SEAICE_MODEL( myTime, myIter, myThid )
235             CALL TIMER_STOP ('SEAICE_MODEL       [FORWARD_STEP]',myThid)
236          ENDIF
237    # endif /* ALLOW_SEAICE */
238    
239    C--   Freeze water at the surface
240    #ifdef ALLOW_AUTODIFF_TAMC
241    CADJ STORE theta = comlev1, key = ikey_dynamics
242  #endif  #endif
243          IF ( allowFreezing .AND. .NOT. useSEAICE
244         &                   .AND. .NOT. useThSIce ) THEN
245            CALL FREEZE_SURFACE(  myTime, myIter, myThid )
246          ENDIF
247    
248    #ifdef ALLOW_AUTODIFF_TAMC
249    # ifdef ALLOW_PTRACERS
250    cph this replaces _bibj storing of ptracer within thermodynamics
251    CADJ STORE ptracer  = comlev1, key = ikey_dynamics
252    # endif
253    #endif
254    
255    #ifdef ALLOW_PTRACERS
256    # ifdef ALLOW_GCHEM
257             CALL GCHEM_FIELDS_LOAD( mytime, myiter, mythid )
258    # endif
259    #endif
260    
261    #ifdef COMPONENT_MODULE
262           IF ( useCoupler ) THEN
263    C      Post coupling data that I export.
264    C      Read in coupling data that I import.
265             CALL TIMER_START('CPL_EXPORT-IMPORT  [FORWARD_STEP]',myThid)
266             CALL CPL_EXPORT_MY_DATA(       myIter, myTime, myThid )
267             CALL CPL_IMPORT_EXTERNAL_DATA( myIter, myTime, myThid )
268             CALL TIMER_STOP ('CPL_EXPORT-IMPORT  [FORWARD_STEP]',myThid)
269           ENDIF
270    #endif /* COMPONENT_MODULE */
271    
272    #ifdef COMPONENT_MODULE
273    # ifndef ALLOW_AIM
274    C jmc: don't know precisely where to put this call. leave it here for now.
275           IF ( useCoupler ) THEN
276             CALL OCN_APPLY_IMPORT( myTime, myIter, myThid )
277           ENDIF
278    # endif
279    #endif /* COMPONENT_MODULE */
280    
281  C--     Step forward fields and calculate time tendency terms.  C--     Step forward fields and calculate time tendency terms.
282          CALL TIMER_START('THERMODYNAMICS      [THE_MAIN_LOOP]',mythid)  
283    C AMM
284    #ifdef ALLOW_FIZHI
285            if( useFIZHI) then
286             CALL UPDATE_OCEAN_EXPORTS ( myTime, myIter, myThid )
287             CALL UPDATE_EARTH_EXPORTS ( myTime, myIter, myThid )
288             CALL UPDATE_CHEMISTRY_EXPORTS ( myTime, myIter, myThid )
289             CALL TIMER_START('FIZHI_WRAPPER       [FORWARD_STEP]',mythid)
290             CALL FIZHI_WRAPPER ( myTime, myIter, myThid )
291             CALL TIMER_STOP ('FIZHI_WRAPPER       [FORWARD_STEP]',mythid)
292             CALL STEP_FIZHI_FG ( myTime, myIter, myThid, deltaTtracer )
293            endif
294    #endif
295    C AMM
296    
297    #ifdef ALLOW_DEBUG
298          IF ( debugLevel .GE. debLevB )
299         &    CALL DEBUG_CALL('THERMODYNAMICS',myThid)
300    #endif
301            CALL TIMER_START('THERMODYNAMICS      [FORWARD_STEP]',mythid)
302          CALL THERMODYNAMICS( myTime, myIter, myThid )          CALL THERMODYNAMICS( myTime, myIter, myThid )
303          CALL TIMER_STOP ('THERMODYNAMICS      [THE_MAIN_LOOP]',mythid)          CALL TIMER_STOP ('THERMODYNAMICS      [FORWARD_STEP]',mythid)
304    
305    C--   do exchanges (needed for DYNAMICS) when using stagger time-step :
306    #ifdef ALLOW_DEBUG
307          IF ( debugLevel .GE. debLevB )
308         &    CALL DEBUG_CALL('DO_STAGGER_FIELDS_EXCH.',myThid)
309    #endif
310            CALL TIMER_START('BLOCKING_EXCHANGES  [FORWARD_STEP]',myThid)
311            CALL DO_STAGGER_FIELDS_EXCHANGES( myTime, myIter, myThid )
312            CALL TIMER_STOP ('BLOCKING_EXCHANGES  [FORWARD_STEP]',myThid)
313    
314  #ifdef ALLOW_SHAP_FILT  #ifdef ALLOW_SHAP_FILT
315         IF (useSHAP_FILT .AND.        IF (useSHAP_FILT .AND.
316       &     staggerTimeStep .AND. shap_filt_TrStagg ) THEN       &     staggerTimeStep .AND. shap_filt_TrStagg ) THEN
317          CALL TIMER_START('SHAP_FILT           [THE_MAIN_LOOP]',myThid)  #ifdef ALLOW_DEBUG
318          CALL SHAP_FILT_APPLY_TS( gT, gS, myTime, myIter, myThid )          IF ( debugLevel .GE. debLevB )
319          CALL TIMER_STOP ('SHAP_FILT           [THE_MAIN_LOOP]',myThid)       &    CALL DEBUG_CALL('SHAP_FILT_APPLY_TS',myThid)
320         ENDIF  #endif
321            CALL TIMER_START('SHAP_FILT           [FORWARD_STEP]',myThid)
322            CALL SHAP_FILT_APPLY_TS(gT,gS,myTime+deltaT,myIter+1,myThid)
323            CALL TIMER_STOP ('SHAP_FILT           [FORWARD_STEP]',myThid)
324          ENDIF
325  #endif  #endif
326    
327  #ifdef ALLOW_ZONAL_FILT  #ifdef ALLOW_ZONAL_FILT
328         IF (useZONAL_FILT .AND.        IF (useZONAL_FILT .AND.
329       &     staggerTimeStep .AND. zonal_filt_TrStagg ) THEN       &     staggerTimeStep .AND. zonal_filt_TrStagg ) THEN
330          CALL TIMER_START('ZONAL_FILT_APPLY    [THE_MAIN_LOOP]',myThid)  #ifdef ALLOW_DEBUG
331            IF ( debugLevel .GE. debLevB )
332         &    CALL DEBUG_CALL('ZONAL_FILT_APPLY_TS',myThid)
333    #endif
334            CALL TIMER_START('ZONAL_FILT_APPLY    [FORWARD_STEP]',myThid)
335          CALL ZONAL_FILT_APPLY_TS( gT, gS, myThid )          CALL ZONAL_FILT_APPLY_TS( gT, gS, myThid )
336          CALL TIMER_STOP ('ZONAL_FILT_APPLY    [THE_MAIN_LOOP]',myThid)          CALL TIMER_STOP ('ZONAL_FILT_APPLY    [FORWARD_STEP]',myThid)
337        ENDIF        ENDIF
338  #endif    #endif  
339    
340  C--     Step forward fields and calculate time tendency terms.  C--   Step forward fields and calculate time tendency terms.
341          IF ( momStepping ) THEN  #ifndef ALLOW_AUTODIFF_TAMC
342          CALL TIMER_START('DYNAMICS            [THE_MAIN_LOOP]',mythid)        IF ( momStepping ) THEN
343    #endif
344    #ifdef ALLOW_DEBUG
345            IF ( debugLevel .GE. debLevB )
346         &    CALL DEBUG_CALL('DYNAMICS',myThid)
347    #endif
348            CALL TIMER_START('DYNAMICS            [FORWARD_STEP]',mythid)
349          CALL DYNAMICS( myTime, myIter, myThid )          CALL DYNAMICS( myTime, myIter, myThid )
350          CALL TIMER_STOP ('DYNAMICS            [THE_MAIN_LOOP]',mythid)          CALL TIMER_STOP ('DYNAMICS            [FORWARD_STEP]',mythid)
351          ENDIF  #ifndef ALLOW_AUTODIFF_TAMC
352          ENDIF
353    #endif
354    
355  #ifdef ALLOW_NONHYDROSTATIC  #ifdef ALLOW_NONHYDROSTATIC
356  C--   Step forward W field in N-H algorithm  C--   Step forward W field in N-H algorithm
357          IF ( momStepping .AND. nonHydrostatic ) THEN        IF ( momStepping .AND. nonHydrostatic ) THEN
358            CALL TIMER_START('CALC_GW          [THE_MAIN_LOOP]',myThid)  #ifdef ALLOW_DEBUG
359            CALL CALC_GW(myThid)            IF ( debugLevel .GE. debLevB )
360            CALL TIMER_STOP ('CALC_GW          [THE_MAIN_LOOP]',myThid)       &     CALL DEBUG_CALL('CALC_GW',myThid)
361          ENDIF  #endif
362             CALL TIMER_START('CALC_GW          [FORWARD_STEP]',myThid)
363             CALL CALC_GW(myThid)
364             CALL TIMER_STOP ('CALC_GW          [FORWARD_STEP]',myThid)
365          ENDIF
366  #endif  #endif
367    
368  #ifdef NONLIN_FRSURF  #ifdef NONLIN_FRSURF
369  C--   update hfacC,W,S and recip_hFac according to etaH(n+1) :  C--   update hfacC,W,S and recip_hFac according to etaH(n+1) :
       IF ( momStepping ) THEN  
370        IF ( nonlinFreeSurf.GT.0) THEN        IF ( nonlinFreeSurf.GT.0) THEN
371           IF ( select_rStar.GT.0 ) THEN
372            CALL TIMER_START('UPDATE_R_STAR      [FORWARD_STEP]',myThid)
373            CALL UPDATE_R_STAR( myTime, myIter, myThid )
374            CALL TIMER_STOP ('UPDATE_R_STAR      [FORWARD_STEP]',myThid)
375           ELSE
376            CALL TIMER_START('UPDATE_SURF_DR     [FORWARD_STEP]',myThid)
377          CALL UPDATE_SURF_DR( myTime, myIter, myThid )          CALL UPDATE_SURF_DR( myTime, myIter, myThid )
378            CALL TIMER_STOP ('UPDATE_SURF_DR     [FORWARD_STEP]',myThid)
379           ENDIF
380        ENDIF        ENDIF
381  C-    update also CG2D matrix (and preconditioner)  C-    update also CG2D matrix (and preconditioner)
382        IF ( nonlinFreeSurf.GT.2) THEN        IF ( momStepping .AND. nonlinFreeSurf.GT.2 ) THEN
383            CALL TIMER_START('UPDATE_CG2D        [FORWARD_STEP]',myThid)
384          CALL UPDATE_CG2D( myTime, myIter, myThid )          CALL UPDATE_CG2D( myTime, myIter, myThid )
385        ENDIF          CALL TIMER_STOP ('UPDATE_CG2D        [FORWARD_STEP]',myThid)
386        ENDIF        ENDIF
387  #endif  #endif
388    
389  C--   Apply Filters to u*,v* before SOLVE_FOR_PRESSURE  C--   Apply Filters to u*,v* before SOLVE_FOR_PRESSURE
390  #ifdef ALLOW_SHAP_FILT  #ifdef ALLOW_SHAP_FILT
391        IF (useSHAP_FILT .AND. shap_filt_uvStar) THEN        IF (useSHAP_FILT .AND. shap_filt_uvStar) THEN
392          CALL TIMER_START('SHAP_FILT           [THE_MAIN_LOOP]',myThid)          CALL TIMER_START('SHAP_FILT           [FORWARD_STEP]',myThid)
         CALL SHAP_FILT_APPLY_UV( gUnm1,gVnm1, myTime,myIter,myThid )  
393          IF (implicDiv2Dflow.LT.1.) THEN          IF (implicDiv2Dflow.LT.1.) THEN
394  C--   Explicit+Implicit part of the Barotropic Flow Divergence  C--   Explicit+Implicit part of the Barotropic Flow Divergence
395  C      => Filtering of uVel,vVel is necessary  C      => Filtering of uVel,vVel is necessary
396            CALL SHAP_FILT_APPLY_UV( uVel,vVel, myTime,myIter,myThid )            CALL SHAP_FILT_APPLY_UV( uVel,vVel,
397         &                             myTime+deltaT, myIter+1, myThid )
398          ENDIF          ENDIF
399          CALL TIMER_STOP ('SHAP_FILT           [THE_MAIN_LOOP]',myThid)          CALL SHAP_FILT_APPLY_UV( gU,gV,myTime+deltaT,myIter+1,myThid)
400            CALL TIMER_STOP ('SHAP_FILT           [FORWARD_STEP]',myThid)
401        ENDIF        ENDIF
402  #endif  #endif
403  #ifdef ALLOW_ZONAL_FILT  #ifdef ALLOW_ZONAL_FILT
404        IF (useZONAL_FILT .AND. zonal_filt_uvStar) THEN        IF (useZONAL_FILT .AND. zonal_filt_uvStar) THEN
405          CALL TIMER_START('ZONAL_FILT_APPLY    [THE_MAIN_LOOP]',myThid)          CALL TIMER_START('ZONAL_FILT_APPLY    [FORWARD_STEP]',myThid)
         CALL ZONAL_FILT_APPLY_UV( gUnm1, gVnm1, myThid )  
406          IF (implicDiv2Dflow.LT.1.) THEN          IF (implicDiv2Dflow.LT.1.) THEN
407  C--   Explicit+Implicit part of the Barotropic Flow Divergence  C--   Explicit+Implicit part of the Barotropic Flow Divergence
408  C      => Filtering of uVel,vVel is necessary  C      => Filtering of uVel,vVel is necessary
409            CALL ZONAL_FILT_APPLY_UV( uVel, vVel, myThid )            CALL ZONAL_FILT_APPLY_UV( uVel, vVel, myThid )
410          ENDIF          ENDIF
411          CALL TIMER_STOP ('ZONAL_FILT_APPLY    [THE_MAIN_LOOP]',myThid)          CALL ZONAL_FILT_APPLY_UV( gU, gV, myThid )
412            CALL TIMER_STOP ('ZONAL_FILT_APPLY    [FORWARD_STEP]',myThid)
413        ENDIF        ENDIF
414  #endif    #endif  
415    
# Line 216  C--   Solve elliptic equation(s). Line 417  C--   Solve elliptic equation(s).
417  C     Two-dimensional only for conventional hydrostatic or  C     Two-dimensional only for conventional hydrostatic or
418  C     three-dimensional for non-hydrostatic and/or IGW scheme.  C     three-dimensional for non-hydrostatic and/or IGW scheme.
419        IF ( momStepping ) THEN        IF ( momStepping ) THEN
420        CALL TIMER_START('SOLVE_FOR_PRESSURE  [THE_MAIN_LOOP]',myThid)        CALL TIMER_START('SOLVE_FOR_PRESSURE  [FORWARD_STEP]',myThid)
421        CALL SOLVE_FOR_PRESSURE(myTime, myIter, myThid)        CALL SOLVE_FOR_PRESSURE(myTime, myIter, myThid)
422        CALL TIMER_STOP ('SOLVE_FOR_PRESSURE  [THE_MAIN_LOOP]',myThid)        CALL TIMER_STOP ('SOLVE_FOR_PRESSURE  [FORWARD_STEP]',myThid)
423        ENDIF        ENDIF
424    
425    #ifdef ALLOW_AUTODIFF_TAMC
426    cph This is needed because convective_adjustment calls
427    cph find_rho which may use pressure()
428    CADJ STORE totphihyd  = comlev1, key = ikey_dynamics
429    #endif
430  C--   Correct divergence in flow field and cycle time-stepping  C--   Correct divergence in flow field and cycle time-stepping
431  C     arrays (for all fields) ; update time-counter  C     arrays (for all fields) ; update time-counter
432        myIter = nIter0 + iLoop        myIter = nIter0 + iLoop
433        myTime = startTime + deltaTClock * float(iLoop)        myTime = startTime + deltaTClock * float(iLoop)
434        CALL TIMER_START('THE_CORRECTION_STEP [THE_MAIN_LOOP]',myThid)        CALL TIMER_START('THE_CORRECTION_STEP [FORWARD_STEP]',myThid)
435        CALL THE_CORRECTION_STEP(myTime, myIter, myThid)        CALL THE_CORRECTION_STEP(myTime, myIter, myThid)
436        CALL TIMER_STOP ('THE_CORRECTION_STEP [THE_MAIN_LOOP]',myThid)        CALL TIMER_STOP ('THE_CORRECTION_STEP [FORWARD_STEP]',myThid)
437    
438  C--   Do "blocking" sends and receives for tendency "overlap" terms  C--   Do "blocking" sends and receives for tendency "overlap" terms
439  c     CALL TIMER_START('BLOCKING_EXCHANGES  [THE_MAIN_LOOP]',myThid)  c     CALL TIMER_START('BLOCKING_EXCHANGES  [FORWARD_STEP]',myThid)
440  c     CALL DO_GTERM_BLOCKING_EXCHANGES( myThid )  c     CALL DO_GTERM_BLOCKING_EXCHANGES( myThid )
441  c     CALL TIMER_STOP ('BLOCKING_EXCHANGES  [THE_MAIN_LOOP]',myThid)  c     CALL TIMER_STOP ('BLOCKING_EXCHANGES  [FORWARD_STEP]',myThid)
442    
443  C--   Do "blocking" sends and receives for field "overlap" terms  C--   Do "blocking" sends and receives for field "overlap" terms
444        CALL TIMER_START('BLOCKING_EXCHANGES  [THE_MAIN_LOOP]',myThid)        CALL TIMER_START('BLOCKING_EXCHANGES  [FORWARD_STEP]',myThid)
445        CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )        CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )
446        CALL TIMER_STOP ('BLOCKING_EXCHANGES  [THE_MAIN_LOOP]',myThid)        CALL TIMER_STOP ('BLOCKING_EXCHANGES  [FORWARD_STEP]',myThid)
447    
448    cswdptr -- add for seperate timestepping of chemical/biological/forcing
449    cswdptr    of ptracers ---
450    #ifdef ALLOW_GCHEM
451    ceh3 This is broken -- this ifdef should not be visible!
452    #ifdef PTRACERS_SEPARATE_FORCING
453    ceh3 needs an IF ( use GCHEM ) THEN
454            call GCHEM_FORCING_SEP( myTime,myIter,myThid )
455    #endif /* PTRACERS_SEPARATE_FORCING */
456    #endif /* ALLOW_GCHEM */
457    cswdptr -- end add ---
458    
459    C AMM
460    #ifdef ALLOW_GRIDALT
461            if (useGRIDALT) CALL GRIDALT_UPDATE(myThid)
462    #endif
463    C AMM
464    
465    C AMM
466    #ifdef ALLOW_FIZHI
467            CALL STEP_FIZHI_CORR ( myTime, myIter, myThid )
468    #endif
469    C AMM
470    
471  #ifdef ALLOW_FLT  #ifdef ALLOW_FLT
472  C--   Calculate float trajectories  C--   Calculate float trajectories
473        IF (useFLT) THEN        IF (useFLT) THEN
474          CALL TIMER_START('FLOATS            [THE_MAIN_LOOP]',myThid)          CALL TIMER_START('FLOATS            [FORWARD_STEP]',myThid)
475          CALL FLT_MAIN(myIter,myTime, myThid)          CALL FLT_MAIN(myIter,myTime, myThid)
476          CALL TIMER_STOP ('FLOATS            [THE_MAIN_LOOP]',myThid)          CALL TIMER_STOP ('FLOATS            [FORWARD_STEP]',myThid)
477        ENDIF        ENDIF
478  #endif  #endif
479    
480  #ifndef EXCLUDE_MONITOR  #ifdef ALLOW_MONITOR
481  C--   Check status of solution (statistics, cfl, etc...)  C--   Check status of solution (statistics, cfl, etc...)
482          CALL TIMER_START('MONITOR             [FORWARD_STEP]',myThid)
483        CALL MONITOR( myIter, myTime, myThid )        CALL MONITOR( myIter, myTime, myThid )
484  #endif /* EXCLUDE_MONITOR */        CALL TIMER_STOP ('MONITOR             [FORWARD_STEP]',myThid)
485    #endif /* ALLOW_MONITOR */
486    
 #ifndef ALLOW_AUTODIFF_TAMC  
487  C--   Do IO if needed.  C--   Do IO if needed.
488        CALL TIMER_START('DO_THE_MODEL_IO     [THE_MAIN_LOOP]',myThid)        CALL TIMER_START('DO_THE_MODEL_IO     [FORWARD_STEP]',myThid)
489        CALL DO_THE_MODEL_IO( myTime, myIter, myThid )        CALL DO_THE_MODEL_IO( myTime, myIter, myThid )
490        CALL TIMER_STOP ('DO_THE_MODEL_IO     [THE_MAIN_LOOP]',myThid)        CALL TIMER_STOP ('DO_THE_MODEL_IO     [FORWARD_STEP]',myThid)
491    
492  C--   Save state for restarts  C--   Save state for restarts
493  C     Note:    (jmc: is it still the case after ckp35 ?)  C     Note:    (jmc: is it still the case after ckp35 ?)
# Line 272  C     Thus a checkpoint contains U.00000 Line 502  C     Thus a checkpoint contains U.00000
502  C     etaN.0000000001 in the indexing scheme used for the model  C     etaN.0000000001 in the indexing scheme used for the model
503  C     "state" files. This example is referred to as a checkpoint  C     "state" files. This example is referred to as a checkpoint
504  C     at time level 1  C     at time level 1
505        CALL TIMER_START('WRITE_CHECKPOINT    [THE_MAIN_LOOP]',myThid)        CALL TIMER_START('WRITE_CHECKPOINT    [FORWARD_STEP]',myThid)
506          CALL PACKAGES_WRITE_PICKUP(
507         I               .FALSE., myTime, myIter, myThid )
508        CALL WRITE_CHECKPOINT(        CALL WRITE_CHECKPOINT(
509       &        .FALSE., myTime, myIter, myThid )       I               .FALSE., myTime, myIter, myThid )  
510        CALL TIMER_STOP ('WRITE_CHECKPOINT    [THE_MAIN_LOOP]',myThid)        CALL TIMER_STOP ('WRITE_CHECKPOINT    [FORWARD_STEP]',myThid)
511    
512  #endif /* ALLOW_AUTODIFF_TAMC */  #ifdef ALLOW_DEBUG
513          IF ( debugLevel .GE. debLevB )
514         &    CALL DEBUG_LEAVE('FORWARD_STEP',myThid)
515    #endif
516    
517          RETURN
518        END        END
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