/[MITgcm]/MITgcm/model/src/forward_step.F
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Revision 1.59 - (hide annotations) (download)
Sun Aug 3 03:17:39 2003 UTC (20 years, 10 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint51e_post, checkpoint51f_pre
Changes since 1.58: +6 -5 lines
little modification to synchronize shapiro-filter diagnostic.

1 jmc 1.59 C $Header: /u/gcmpack/MITgcm/model/src/forward_step.F,v 1.58 2003/07/10 16:09:01 jmc Exp $
2 adcroft 1.15 C $Name: $
3 adcroft 1.1
4     #include "CPP_OPTIONS.h"
5 heimbach 1.56 #ifdef ALLOW_AUTODIFF_TAMC
6     # ifdef ALLOW_PTRACERS
7     # include "PTRACERS_OPTIONS.h"
8     # endif
9     #endif /* ALLOW_AUTODIFF_TAMC */
10 stephd 1.55 cswdptr -- add --
11 heimbach 1.56 #ifdef ALLOW_GCHEM
12     # include "GCHEM_OPTIONS.h"
13 stephd 1.55 #endif
14     cswdptr -- end add ---
15 adcroft 1.1
16 cnh 1.22 CBOP
17     C !ROUTINE: FORWARD_STEP
18     C !INTERFACE:
19 adcroft 1.13 SUBROUTINE FORWARD_STEP( iloop, myTime, myIter, myThid )
20 heimbach 1.12
21 cnh 1.22 C !DESCRIPTION: \bv
22     C *==================================================================
23     C | SUBROUTINE forward_step
24     C | o Run the ocean model and, optionally, evaluate a cost function.
25     C *==================================================================
26     C |
27     C | THE_MAIN_LOOP is the toplevel routine for the Tangent Linear and
28     C | Adjoint Model Compiler (TAMC). For this purpose the initialization
29     C | of the model was split into two parts. Those parameters that do
30     C | not depend on a specific model run are set in INITIALISE_FIXED,
31     C | whereas those that do depend on the specific realization are
32     C | initialized in INITIALISE_VARIA.
33     C |
34     C *==================================================================
35     C \ev
36 adcroft 1.1
37 cnh 1.22 C !USES:
38     IMPLICIT NONE
39     C == Global variables ==
40 adcroft 1.1 #include "SIZE.h"
41     #include "EEPARAMS.h"
42     #include "PARAMS.h"
43     #include "DYNVARS.h"
44 heimbach 1.12 #include "FFIELDS.h"
45    
46 adcroft 1.1 #ifdef ALLOW_NONHYDROSTATIC
47     #include "CG3D.h"
48     #endif
49    
50 jmc 1.27 #ifdef ALLOW_SHAP_FILT
51     #include "SHAP_FILT.h"
52     #endif
53     #ifdef ALLOW_ZONAL_FILT
54     #include "ZONAL_FILT.h"
55     #endif
56    
57 heimbach 1.12 #ifdef ALLOW_AUTODIFF_TAMC
58 heimbach 1.30 # include "tamc.h"
59     # include "ctrl.h"
60     # include "ctrl_dummy.h"
61     # include "cost.h"
62 heimbach 1.37 # include "EOS.h"
63 heimbach 1.30 # ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE
64     # include "exf_fields.h"
65 dimitri 1.45 # if (defined (ALLOW_BULKFORMULAE) || defined (ALLOW_BULK_FORCE))
66 heimbach 1.30 # include "exf_constants.h"
67     # endif
68     # endif
69     # ifdef ALLOW_OBCS
70     # include "OBCS.h"
71     # endif
72 heimbach 1.56 # ifdef ALLOW_PTRACERS
73     # include "PTRACERS.h"
74     # endif
75     #endif /* ALLOW_AUTODIFF_TAMC */
76 heimbach 1.12
77 cnh 1.22 C !LOCAL VARIABLES:
78     C == Routine arguments ==
79 adcroft 1.13 C note: under the multi-threaded model myiter and
80     C mytime are local variables passed around as routine
81     C arguments. Although this is fiddly it saves the need to
82     C impose additional synchronisation points when they are
83     C updated.
84     C myiter - iteration counter for this thread
85     C mytime - time counter for this thread
86     C mythid - thread number for this instance of the routine.
87 heimbach 1.12 integer iloop
88     integer mythid
89     integer myiter
90     _RL mytime
91 dimitri 1.45 #ifdef ALLOW_BULK_FORCE
92 jmc 1.21 INTEGER bi,bj
93 dimitri 1.50 #endif
94 heimbach 1.12
95 cnh 1.22 CEOP
96 heimbach 1.12
97 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
98 heimbach 1.57 IF ( debugLevel .GE. debLevB )
99     & CALL DEBUG_ENTER('FORWARD_STEP',myThid)
100 adcroft 1.53 #endif
101    
102 heimbach 1.12 #ifdef ALLOW_AUTODIFF_TAMC
103 dimitri 1.45 C-- Reset the model iteration counter and the model time.
104     myiter = nIter0 + (iloop-1)
105     mytime = startTime + float(iloop-1)*deltaTclock
106 heimbach 1.12 #endif
107    
108 heimbach 1.32 #if (defined (ALLOW_AUTODIFF_TAMC) && defined (ALLOW_AUTODIFF_MONITOR))
109 dimitri 1.45 C Include call to a dummy routine. Its adjoint will be
110     C called at the proper place in the adjoint code.
111     C The adjoint routine will print out adjoint values
112     C if requested. The location of the call is important,
113     C it has to be after the adjoint of the exchanges
114     C (DO_GTERM_BLOCKING_EXCHANGES).
115     CALL DUMMY_IN_STEPPING( myTime, myIter, myThid )
116 heimbach 1.46 cph I've commented this line since it may conflict with MITgcm's adjoint
117     cph However, need to check whether that's still consistent
118     cph with the ecco-branch (it should).
119     cph CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )
120 heimbach 1.16 #endif
121    
122 jmc 1.21 #ifdef EXACT_CONSERV
123     IF (exactConserv) THEN
124     C-- Update etaH(n+1) :
125 heimbach 1.36 CALL TIMER_START('UPDATE_ETAH [FORWARD_STEP]',mythid)
126 jmc 1.35 CALL UPDATE_ETAH( myTime, myIter, myThid )
127 heimbach 1.36 CALL TIMER_STOP ('UPDATE_ETAH [FORWARD_STEP]',mythid)
128 jmc 1.21 ENDIF
129     #endif /* EXACT_CONSERV */
130    
131 jmc 1.18 #ifdef NONLIN_FRSURF
132 jmc 1.48 IF ( select_rStar.NE.0 ) THEN
133     C-- r* : compute the future level thickness according to etaH(n+1)
134     CALL TIMER_START('CALC_R_STAR [FORWARD_STEP]',mythid)
135     CALL CALC_R_STAR(etaH, myTime, myIter, myThid )
136     CALL TIMER_STOP ('CALC_R_STAR [FORWARD_STEP]',mythid)
137     ELSEIF ( nonlinFreeSurf.GT.0) THEN
138     C-- compute the future surface level thickness according to etaH(n+1)
139 heimbach 1.36 CALL TIMER_START('CALC_SURF_DR [FORWARD_STEP]',mythid)
140 jmc 1.21 CALL CALC_SURF_DR(etaH, myTime, myIter, myThid )
141 heimbach 1.36 CALL TIMER_STOP ('CALC_SURF_DR [FORWARD_STEP]',mythid)
142 jmc 1.48 ENDIF
143 jmc 1.21 #endif /* NONLIN_FRSURF */
144 jmc 1.18
145 dimitri 1.45 C-- Load forcing/external data fields.
146 heimbach 1.28 #ifdef ALLOW_AUTODIFF_TAMC
147     c**************************************
148     #include "checkpoint_lev1_directives.h"
149     c**************************************
150 heimbach 1.23 #endif
151 cheisey 1.38
152    
153 heimbach 1.37 C-- Call external forcing package
154 cheisey 1.40 #ifdef ALLOW_BULK_FORCE
155 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
156 jmc 1.58 IF ( useBulkforce ) THEN
157     IF ( debugLevel .GE. debLevB )
158 heimbach 1.57 & CALL DEBUG_CALL('BULKF_FIELDS_LOAD',myThid)
159 adcroft 1.53 #endif
160 cheisey 1.38 CALL TIMER_START('BULKF_FIELDS_LOAD[THE_MAIN_LOOP]',mythid)
161     CALL BULKF_FIELDS_LOAD( mytime, myiter, mythid )
162     CALL TIMER_STOP ('BULKF_FIELDS_LOAD[THE_MAIN_LOOP]',mythid)
163     c calculate qnet and empmr (and wind stress)
164     DO bj=myByLo(myThid),myByHi(myThid)
165     DO bi=myBxLo(myThid),myBxHi(myThid)
166     CALL BULKF_FORCING( bi,bj, mytime, myiter, mythid )
167     ENDDO
168     ENDDO
169     c Update the tile edges.
170     _EXCH_XY_R8(Qnet, mythid)
171     _EXCH_XY_R8(EmPmR, mythid)
172 cheisey 1.43 CALL EXCH_UV_XY_RS(fu, fv, .TRUE., myThid)
173     C _EXCH_XY_R8(fu , mythid)
174     C _EXCH_XY_R8(fv , mythid)
175 jmc 1.58 ELSE
176 heimbach 1.49 #else /* ALLOW_BULK_FORCE undef */
177 jmc 1.58 IF ( .TRUE. ) THEN
178     #endif /* ALLOW_BULK_FORCE */
179 heimbach 1.49 # ifdef INCLUDE_EXTERNAL_FORCING_PACKAGE
180 dimitri 1.45 C NOTE, that although the exf package is part of the
181     C distribution, it is not currently maintained, i.e.
182     C exf is disabled by default in genmake.
183 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
184 heimbach 1.57 IF ( debugLevel .GE. debLevB )
185     & CALL DEBUG_CALL('EXF_GETFORCING',myThid)
186 adcroft 1.53 #endif
187 dimitri 1.45 CALL TIMER_START('EXF_GETFORCING [FORWARD_STEP]',mythid)
188     CALL EXF_GETFORCING( mytime, myiter, mythid )
189     CALL TIMER_STOP ('EXF_GETFORCING [FORWARD_STEP]',mythid)
190 heimbach 1.49 # else /* INCLUDE_EXTERNAL_FORCING_PACKAGE undef */
191     cph The following IF-statement creates an additional dependency
192     cph for the forcing fields requiring additional storing.
193     cph Therefore, the IF-statement will be put between CPP-OPTIONS,
194     cph assuming that ALLOW_SEAICE has not yet been differentiated.
195     # ifdef ALLOW_SEAICE
196 dimitri 1.45 IF ( .NOT. useSEAICE ) THEN
197 heimbach 1.49 # endif
198 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
199 heimbach 1.57 IF ( debugLevel .GE. debLevB )
200     & CALL DEBUG_CALL('EXTERNAL_FIELDS_LOAD',myThid)
201 adcroft 1.53 #endif
202 dimitri 1.45 CALL TIMER_START('EXTERNAL_FIELDS_LOAD[FORWARD_STEP]',mythid)
203     CALL EXTERNAL_FIELDS_LOAD( mytime, myiter, mythid )
204     CALL TIMER_STOP ('EXTERNAL_FIELDS_LOAD[FORWARD_STEP]',mythid)
205 heimbach 1.49 # ifdef ALLOW_SEAICE
206 dimitri 1.45 ENDIF
207 heimbach 1.49 # endif
208     # endif /* INCLUDE_EXTERNAL_FORCING_PACKAGE */
209 jmc 1.58 C-- end of if/else block useBulfforce --
210     ENDIF
211 heimbach 1.49
212     #if (defined (ALLOW_ADJOINT_RUN) || defined (ALLOW_TANGENTLINEAR_RUN))
213     c-- Add control vector for forcing and parameter fields
214     if ( myiter .EQ. nIter0 )
215     & CALL CTRL_MAP_FORCING (mythid)
216     #endif
217 cheisey 1.38
218 heimbach 1.49 # ifdef ALLOW_SEAICE
219 dimitri 1.45 C-- Call sea ice model to compute forcing/external data fields. In
220     C addition to computing prognostic sea-ice variables and diagnosing the
221     C forcing/external data fields that drive the ocean model, SEAICE_MODEL
222     C also sets theta to the freezing point under sea-ice. The implied
223     C surface heat flux is then stored in variable surfaceTendencyTice,
224     C which is needed by KPP package (kpp_calc.F and kpp_transport_t.F)
225     C to diagnose surface buoyancy fluxes and for the non-local transport
226     C term. Because this call precedes model thermodynamics, temperature
227     C under sea-ice may not be "exactly" at the freezing point by the time
228     C theta is dumped or time-averaged.
229     IF ( useSEAICE ) THEN
230 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
231 heimbach 1.57 IF ( debugLevel .GE. debLevB )
232     & CALL DEBUG_CALL('SEAICE_MODEL',myThid)
233 adcroft 1.53 #endif
234 heimbach 1.36 CALL TIMER_START('SEAICE_MODEL [FORWARD_STEP]',myThid)
235 jmc 1.41 CALL SEAICE_MODEL( myTime, myIter, myThid )
236 heimbach 1.36 CALL TIMER_STOP ('SEAICE_MODEL [FORWARD_STEP]',myThid)
237 dimitri 1.45 ENDIF
238 dimitri 1.50 # endif /* ALLOW_SEAICE */
239 adcroft 1.15
240 heimbach 1.56 #ifdef ALLOW_AUTODIFF_TAMC
241     # ifdef ALLOW_PTRACERS
242     cph this replaces _bibj storing of ptracer within thermodynamics
243     CADJ STORE ptracer = comlev1, key = ikey_dynamics
244     # endif
245     #endif
246 adcroft 1.15 C-- Step forward fields and calculate time tendency terms.
247 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
248 heimbach 1.57 IF ( debugLevel .GE. debLevB )
249     & CALL DEBUG_CALL('THERMODYNAMICS',myThid)
250 adcroft 1.53 #endif
251 heimbach 1.36 CALL TIMER_START('THERMODYNAMICS [FORWARD_STEP]',mythid)
252 adcroft 1.15 CALL THERMODYNAMICS( myTime, myIter, myThid )
253 heimbach 1.36 CALL TIMER_STOP ('THERMODYNAMICS [FORWARD_STEP]',mythid)
254 jmc 1.35
255     C-- do exchanges (needed for DYNAMICS) when using stagger time-step :
256 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
257 heimbach 1.57 IF ( debugLevel .GE. debLevB )
258     & CALL DEBUG_CALL('DO_STAGGER_FIELDS_EXCH.',myThid)
259 adcroft 1.53 #endif
260 heimbach 1.36 CALL TIMER_START('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
261 jmc 1.35 CALL DO_STAGGER_FIELDS_EXCHANGES( myTime, myIter, myThid )
262 heimbach 1.36 CALL TIMER_STOP ('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
263 jmc 1.24
264     #ifdef ALLOW_SHAP_FILT
265 dimitri 1.45 IF (useSHAP_FILT .AND.
266 jmc 1.27 & staggerTimeStep .AND. shap_filt_TrStagg ) THEN
267 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
268 heimbach 1.57 IF ( debugLevel .GE. debLevB )
269     & CALL DEBUG_CALL('SHAP_FILT_APPLY_TS',myThid)
270 adcroft 1.53 #endif
271 heimbach 1.36 CALL TIMER_START('SHAP_FILT [FORWARD_STEP]',myThid)
272 jmc 1.59 CALL SHAP_FILT_APPLY_TS(gT,gS,myTime+deltaT,myIter+1,myThid)
273 heimbach 1.36 CALL TIMER_STOP ('SHAP_FILT [FORWARD_STEP]',myThid)
274 dimitri 1.45 ENDIF
275 jmc 1.24 #endif
276 jmc 1.27 #ifdef ALLOW_ZONAL_FILT
277 dimitri 1.45 IF (useZONAL_FILT .AND.
278 jmc 1.27 & staggerTimeStep .AND. zonal_filt_TrStagg ) THEN
279 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
280 heimbach 1.57 IF ( debugLevel .GE. debLevB )
281     & CALL DEBUG_CALL('ZONAL_FILT_APPLY_TS',myThid)
282 adcroft 1.53 #endif
283 heimbach 1.36 CALL TIMER_START('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
284 jmc 1.27 CALL ZONAL_FILT_APPLY_TS( gT, gS, myThid )
285 heimbach 1.36 CALL TIMER_STOP ('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
286 jmc 1.27 ENDIF
287     #endif
288 heimbach 1.12
289 dimitri 1.45 C-- Step forward fields and calculate time tendency terms.
290     IF ( momStepping ) THEN
291 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
292 heimbach 1.57 IF ( debugLevel .GE. debLevB )
293     & CALL DEBUG_CALL('DYNAMICS',myThid)
294 adcroft 1.53 #endif
295 heimbach 1.36 CALL TIMER_START('DYNAMICS [FORWARD_STEP]',mythid)
296 heimbach 1.12 CALL DYNAMICS( myTime, myIter, myThid )
297 heimbach 1.36 CALL TIMER_STOP ('DYNAMICS [FORWARD_STEP]',mythid)
298 dimitri 1.45 ENDIF
299 heimbach 1.12
300 adcroft 1.1 #ifdef ALLOW_NONHYDROSTATIC
301     C-- Step forward W field in N-H algorithm
302 dimitri 1.45 IF ( momStepping .AND. nonHydrostatic ) THEN
303 adcroft 1.53 #ifndef DISABLE_DEBUGMODE
304 heimbach 1.57 IF ( debugLevel .GE. debLevB )
305     & CALL DEBUG_CALL('CALC_GW',myThid)
306 adcroft 1.53 #endif
307 dimitri 1.45 CALL TIMER_START('CALC_GW [FORWARD_STEP]',myThid)
308     CALL CALC_GW(myThid)
309     CALL TIMER_STOP ('CALC_GW [FORWARD_STEP]',myThid)
310     ENDIF
311 adcroft 1.1 #endif
312 jmc 1.18
313     #ifdef NONLIN_FRSURF
314 jmc 1.21 C-- update hfacC,W,S and recip_hFac according to etaH(n+1) :
315 jmc 1.18 IF ( nonlinFreeSurf.GT.0) THEN
316 jmc 1.48 IF ( select_rStar.GT.0 ) THEN
317     CALL TIMER_START('UPDATE_R_STAR [FORWARD_STEP]',myThid)
318     CALL UPDATE_R_STAR( myTime, myIter, myThid )
319     CALL TIMER_STOP ('UPDATE_R_STAR [FORWARD_STEP]',myThid)
320     ELSE
321 dimitri 1.45 CALL TIMER_START('UPDATE_SURF_DR [FORWARD_STEP]',myThid)
322 jmc 1.18 CALL UPDATE_SURF_DR( myTime, myIter, myThid )
323 heimbach 1.36 CALL TIMER_STOP ('UPDATE_SURF_DR [FORWARD_STEP]',myThid)
324 jmc 1.48 ENDIF
325 jmc 1.18 ENDIF
326     C- update also CG2D matrix (and preconditioner)
327 jmc 1.33 IF ( momStepping .AND. nonlinFreeSurf.GT.2 ) THEN
328 dimitri 1.45 CALL TIMER_START('UPDATE_CG2D [FORWARD_STEP]',myThid)
329 jmc 1.18 CALL UPDATE_CG2D( myTime, myIter, myThid )
330 jmc 1.47 CALL TIMER_STOP ('UPDATE_CG2D [FORWARD_STEP]',myThid)
331 adcroft 1.19 ENDIF
332 jmc 1.18 #endif
333 adcroft 1.1
334 jmc 1.27 C-- Apply Filters to u*,v* before SOLVE_FOR_PRESSURE
335     #ifdef ALLOW_SHAP_FILT
336     IF (useSHAP_FILT .AND. shap_filt_uvStar) THEN
337 heimbach 1.36 CALL TIMER_START('SHAP_FILT [FORWARD_STEP]',myThid)
338 jmc 1.27 IF (implicDiv2Dflow.LT.1.) THEN
339     C-- Explicit+Implicit part of the Barotropic Flow Divergence
340     C => Filtering of uVel,vVel is necessary
341 jmc 1.59 CALL SHAP_FILT_APPLY_UV( uVel,vVel,
342     & myTime+deltaT, myIter+1, myThid )
343 jmc 1.27 ENDIF
344 jmc 1.59 CALL SHAP_FILT_APPLY_UV( gU,gV,myTime+deltaT,myIter+1,myThid)
345 heimbach 1.36 CALL TIMER_STOP ('SHAP_FILT [FORWARD_STEP]',myThid)
346 jmc 1.27 ENDIF
347     #endif
348     #ifdef ALLOW_ZONAL_FILT
349     IF (useZONAL_FILT .AND. zonal_filt_uvStar) THEN
350 heimbach 1.36 CALL TIMER_START('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
351 jmc 1.27 IF (implicDiv2Dflow.LT.1.) THEN
352     C-- Explicit+Implicit part of the Barotropic Flow Divergence
353     C => Filtering of uVel,vVel is necessary
354     CALL ZONAL_FILT_APPLY_UV( uVel, vVel, myThid )
355     ENDIF
356 jmc 1.59 CALL ZONAL_FILT_APPLY_UV( gU, gV, myThid )
357 heimbach 1.36 CALL TIMER_STOP ('ZONAL_FILT_APPLY [FORWARD_STEP]',myThid)
358 jmc 1.27 ENDIF
359     #endif
360 heimbach 1.12
361 adcroft 1.1 C-- Solve elliptic equation(s).
362     C Two-dimensional only for conventional hydrostatic or
363     C three-dimensional for non-hydrostatic and/or IGW scheme.
364 adcroft 1.19 IF ( momStepping ) THEN
365 heimbach 1.36 CALL TIMER_START('SOLVE_FOR_PRESSURE [FORWARD_STEP]',myThid)
366 jmc 1.31 CALL SOLVE_FOR_PRESSURE(myTime, myIter, myThid)
367 heimbach 1.36 CALL TIMER_STOP ('SOLVE_FOR_PRESSURE [FORWARD_STEP]',myThid)
368 adcroft 1.19 ENDIF
369 adcroft 1.1
370 heimbach 1.37 #ifdef ALLOW_AUTODIFF_TAMC
371     cph This is needed because convective_adjustment calls
372     cph find_rho which may use pressure()
373 heimbach 1.51 CADJ STORE totphihyd = comlev1, key = ikey_dynamics
374 heimbach 1.37 #endif
375 adcroft 1.5 C-- Correct divergence in flow field and cycle time-stepping
376 jmc 1.7 C arrays (for all fields) ; update time-counter
377 heimbach 1.12 myIter = nIter0 + iLoop
378     myTime = startTime + deltaTClock * float(iLoop)
379 heimbach 1.36 CALL TIMER_START('THE_CORRECTION_STEP [FORWARD_STEP]',myThid)
380 heimbach 1.12 CALL THE_CORRECTION_STEP(myTime, myIter, myThid)
381 heimbach 1.36 CALL TIMER_STOP ('THE_CORRECTION_STEP [FORWARD_STEP]',myThid)
382 adcroft 1.5
383 adcroft 1.1 C-- Do "blocking" sends and receives for tendency "overlap" terms
384 heimbach 1.36 c CALL TIMER_START('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
385 jmc 1.7 c CALL DO_GTERM_BLOCKING_EXCHANGES( myThid )
386 heimbach 1.36 c CALL TIMER_STOP ('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
387 adcroft 1.5
388     C-- Do "blocking" sends and receives for field "overlap" terms
389 heimbach 1.36 CALL TIMER_START('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
390 adcroft 1.5 CALL DO_FIELDS_BLOCKING_EXCHANGES( myThid )
391 heimbach 1.36 CALL TIMER_STOP ('BLOCKING_EXCHANGES [FORWARD_STEP]',myThid)
392 stephd 1.54
393     cswdptr -- add for seperate timestepping of chemical/biological/forcing
394     cswdptr of ptracers ---
395 heimbach 1.56 #ifdef ALLOW_GCHEM
396 stephd 1.54 #ifdef PTRACERS_SEPERATE_FORCING
397     call GCHEM_FORCING( myTime,myIter,myThid )
398     #endif
399     #endif
400     cswdptr -- end add ---
401    
402 adcroft 1.20
403     #ifdef ALLOW_FLT
404     C-- Calculate float trajectories
405     IF (useFLT) THEN
406 heimbach 1.36 CALL TIMER_START('FLOATS [FORWARD_STEP]',myThid)
407 adcroft 1.20 CALL FLT_MAIN(myIter,myTime, myThid)
408 heimbach 1.36 CALL TIMER_STOP ('FLOATS [FORWARD_STEP]',myThid)
409 adcroft 1.20 ENDIF
410     #endif
411 heimbach 1.12
412     #ifndef EXCLUDE_MONITOR
413     C-- Check status of solution (statistics, cfl, etc...)
414 dimitri 1.45 CALL TIMER_START('MONITOR [FORWARD_STEP]',myThid)
415 heimbach 1.12 CALL MONITOR( myIter, myTime, myThid )
416 heimbach 1.36 CALL TIMER_STOP ('MONITOR [FORWARD_STEP]',myThid)
417 heimbach 1.12 #endif /* EXCLUDE_MONITOR */
418 adcroft 1.1
419 jmc 1.7 C-- Do IO if needed.
420 heimbach 1.36 CALL TIMER_START('DO_THE_MODEL_IO [FORWARD_STEP]',myThid)
421 heimbach 1.12 CALL DO_THE_MODEL_IO( myTime, myIter, myThid )
422 heimbach 1.36 CALL TIMER_STOP ('DO_THE_MODEL_IO [FORWARD_STEP]',myThid)
423 adcroft 1.1
424     C-- Save state for restarts
425 jmc 1.7 C Note: (jmc: is it still the case after ckp35 ?)
426 adcroft 1.1 C =====
427     C Because of the ordering of the timestepping code and
428     C tendency term code at end of loop model arrays hold
429     C U,V,T,S at "time-level" N but gu, gv, gs, gt, guNM1,...
430     C at "time-level" N+1/2 (guNM1 at "time-level" N+1/2 is
431 jmc 1.10 C gu at "time-level" N-1/2) and etaN at "time-level" N+1/2.
432 adcroft 1.1 C where N = I+timeLevBase-1
433     C Thus a checkpoint contains U.0000000000, GU.0000000001 and
434 jmc 1.10 C etaN.0000000001 in the indexing scheme used for the model
435 adcroft 1.1 C "state" files. This example is referred to as a checkpoint
436     C at time level 1
437 heimbach 1.36 CALL TIMER_START('WRITE_CHECKPOINT [FORWARD_STEP]',myThid)
438 adcroft 1.1 CALL WRITE_CHECKPOINT(
439 heimbach 1.12 & .FALSE., myTime, myIter, myThid )
440 heimbach 1.36 CALL TIMER_STOP ('WRITE_CHECKPOINT [FORWARD_STEP]',myThid)
441 adcroft 1.53
442     #ifndef DISABLE_DEBUGMODE
443 heimbach 1.57 IF ( debugLevel .GE. debLevB )
444     & CALL DEBUG_LEAVE('FORWARD_STEP',myThid)
445 adcroft 1.53 #endif
446 adcroft 1.1
447     END

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