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Revision 1.46 - (hide annotations) (download)
Wed Sep 18 16:38:02 2002 UTC (21 years, 8 months ago) by mlosch
Branch: MAIN
CVS Tags: checkpoint46h_pre, checkpoint46g_post
Changes since 1.45: +2 -1 lines
o Include a new diagnostic variable phiHydLow for the ocean model
  - in z-coordinates, it is the bottom pressure anomaly
  - in p-coordinates, it is the sea surface elevation
  - in both cases, these variable have global drift, reflecting the mass
    drift in z-coordinates and the volume drift in p-coordinates
  - included time averaging for phiHydLow, be aware of the drift!
o depth-dependent computation of Bo_surf for pressure coordinates
  in the ocean (buoyancyRelation='OCEANICP')
  - requires a new routine (FIND_RHO_SCALAR) to compute density with only
    Theta, Salinity, and Pressure in the parameter list. This routine is
    presently contained in find_rho.F. This routine does not give the
    correct density for 'POLY3', which would be a z-dependent reference
    density.
o cleaned up find_rho
  - removed obsolete 'eqn' from the parameter list.
o added two new verification experiments: gop and goz
  (4x4 degree global ocean, 15 layers in pressure and height coordinates)

1 mlosch 1.46 C $Header: /u/gcmpack/MITgcm/model/src/the_model_main.F,v 1.45 2002/09/16 18:11:58 heimbach Exp $
2 cnh 1.41 C $Name: $
3    
4     CBOI
5     C
6     C !TITLE: MITGCM KERNEL CODE SYNOPSIS
7     C !AUTHORS: mitgcm developers ( support@mitgcm.org )
8     C !AFFILIATION: Massachussetts Institute of Technology
9     C !DATE:
10 adcroft 1.43 C !INTRODUCTION: Kernel dynamical routines
11 cnh 1.42 C This document summarises MITgcm code under the model/ subdirectory.
12     C The code under model/ ( src/ and inc/ ) contains most of
13     C the driver routines for the baseline forms of the kernel equations in the
14     C MITgcm algorithm. Numerical code for much of the baseline forms of
15     C these equations is also under the model/ directory. Other numerical code
16     C used for the kernel equations is contained in packages in the pkg/
17     C directory tree.
18     C Code for auxilliary equations and alternate dicretizations of the kernel
19     C equations and algorithm can also be found in the pkg/ directory tree.
20     C
21     C \subsection{Getting Help and Reporting Errors and Problems}
22     C If you have questions please e-mail support@mitgcm.org. We also welcome
23     C reports of errors and inconsistencies in the code or in the accompanying
24     C documentation. Please feel free to send these
25     C to support@mitgcm.org. For further information and to review
26     C problems reported to support@mitgcm.org please visit http://mitgcm.org.
27     C
28     C \subsection{MITgcm Kernel Code Calling Sequence}
29     C \bv
30     C
31     C Invocation from WRAPPER level...
32     C :
33     C :
34     C |
35     C |-THE_MODEL_MAIN :: Primary driver for the MITgcm algorithm
36     C | :: Called from WRAPPER level numerical
37     C | :: code innvocation routine. On entry
38     C | :: to THE_MODEL_MAIN separate thread and
39     C | :: separate processes will have been established.
40     C | :: Each thread and process will have a unique ID
41     C | :: but as yet it will not be associated with a
42     C | :: specific region in decomposed discrete space.
43     C |
44     C |-INITIALISE_FIXED :: Set fixed model arrays such as topography,
45     C | | :: grid, solver matrices etc..
46     C | |
47     C | |-INI_PARMS :: Routine to set kernel model parameters.
48     C | | :: By default kernel parameters are read from file
49     C | | :: "data" in directory in which code executes.
50     C | |
51     C | |-MON_INIT :: Initialises monitor pacakge ( see pkg/monitor )
52     C | |
53     C | |-INI_GRID :: Control grid array (vert. and hori.) initialisation.
54     C | | | :: Grid arrays are held and described in GRID.h.
55     C | | |
56     C | | |-INI_VERTICAL_GRID :: Initialise vertical grid arrays.
57     C | | |
58     C | | |-INI_CARTESIAN_GRID :: Cartesian horiz. grid initialisation
59     C | | | :: (calculate grid from kernel parameters).
60     C | | |
61     C | | |-INI_SPHERICAL_POLAR_GRID :: Spherical polar horiz. grid
62     C | | | :: initialisation (calculate grid from
63     C | | | :: kernel parameters).
64     C | | |
65     C | | |-INI_CURVILINEAR_GRID :: General orthogonal, structured horiz.
66     C | | :: grid initialisations. ( input from raw
67     C | | :: grid files, LONC.bin, DXF.bin etc... )
68     C | |
69     C | |-INI_DEPTHS :: Read (from "bathyFile") or set bathymetry/orgography.
70     C | |
71     C | |-INI_MASKS_ETC :: Derive horizontal and vertical cell fractions and
72     C | | :: land masking for solid-fluid boundaries.
73     C | |
74     C | |-INI_LINEAR_PHSURF :: Set ref. surface Bo_surf
75     C | |
76     C | |-INI_CORI :: Set coriolis term. zero, f-plane, beta-plane,
77     C | | :: sphere optins are coded.
78     C | |
79     C | |-PACAKGES_BOOT :: Start up the optional package environment.
80     C | | :: Runtime selection of active packages.
81     C | |
82     C | |-PACKAGES_READPARMS :: Call active package internal parameter load.
83     C | | |
84     C | | |-GMREDI_READPARMS :: GM Package. see pkg/gmredi
85     C | | |-KPP_READPARMS :: KPP Package. see pkg/kpp
86     C | | |-SHAP_FILT_READPARMS :: Shapiro filter package. see pkg/shap_filt
87     C | | |-OBCS_READPARMS :: Open bndy package. see pkg/obcs
88     C | | |-AIM_READPARMS :: Intermediate Atmos. pacakage. see pkg/aim
89     C | | |-COST_READPARMS :: Cost function package. see pkg/cost
90     C | | |-CTRL_INIT :: Control vector support package. see pkg/ctrl
91     C | | |-OPTIM_READPARMS :: Optimisation support package. see pkg/ctrl
92     C | | |-GRDCHK_READPARMS :: Gradient check package. see pkg/grdchk
93     C | | |-ECCO_READPARMS :: ECCO Support Package. see pkg/ecco
94     C | |
95     C | |-PACKAGES_CHECK
96     C | | |
97     C | | |-KPP_CHECK :: KPP Package. pkg/kpp
98     C | | |-OBCS_CHECK :: Open bndy Pacakge. pkg/obcs
99     C | | |-GMREDI_CHECK :: GM Package. pkg/gmredi
100     C | |
101     C | |-PACKAGES_INIT_FIXED
102     C | | |-OBCS_INIT_FIXED :: Open bndy Package. see pkg/obcs
103     C | | |-FLT_INIT :: Floats Package. see pkg/flt
104     C | |
105     C | |-ZONAL_FILT_INIT :: FFT filter Package. see pkg/zonal_filt
106     C | |
107     C | |-INI_CG2D :: 2d con. grad solver initialisation.
108     C | |
109     C | |-INI_CG3D :: 3d con. grad solver initialisation.
110     C | |
111     C | |-CONFIG_SUMMARY :: Provide synopsis of kernel setup.
112     C | :: Includes annotated table of kernel
113     C | :: parameter settings.
114     C |
115     C |-CTRL_UNPACK :: Control vector support package. see pkg/ctrl
116     C |
117     C |-ADTHE_MAIN_LOOP :: Derivative evaluating form of main time stepping loop
118     C ! :: Auotmatically gerenrated by TAMC/TAF.
119     C |
120     C |-CTRL_PACK :: Control vector support package. see pkg/ctrl
121     C |
122     C |-GRDCHK_MAIN :: Gradient check package. see pkg/grdchk
123     C |
124     C |-THE_MAIN_LOOP :: Main timestepping loop routine.
125     C | |
126     C | |-INITIALISE_VARIA :: Set the initial conditions for time evolving
127     C | | | :: variables
128     C | | |
129     C | | |-INI_LINEAR_PHISURF :: Set ref. surface Bo_surf
130     C | | |
131     C | | |-INI_CORI :: Set coriolis term. zero, f-plane, beta-plane,
132     C | | | :: sphere optins are coded.
133     C | | |
134     C | | |-INI_CG2D :: 2d con. grad solver initialisation.
135     C | | |-INI_CG3D :: 3d con. grad solver initialisation.
136     C | | |-INI_MIXING :: Initialise diapycnal diffusivity.
137     C | | |-INI_DYNVARS :: Initialise to zero all DYNVARS.h arrays (dynamical
138     C | | | :: fields).
139     C | | |
140     C | | |-INI_FIELDS :: Control initialising model fields to non-zero
141     C | | | |-INI_VEL :: Initialize 3D flow field.
142     C | | | |-INI_THETA :: Set model initial temperature field.
143     C | | | |-INI_SALT :: Set model initial salinity field.
144     C | | | |-INI_PSURF :: Set model initial free-surface height/pressure.
145 mlosch 1.46 C | | | |-INI_PRESSURE :: Compute model initial hydrostatic pressure
146 cnh 1.42 C | | |
147     C | | |-INI_TR1 :: Set initial tracer 1 distribution.
148     C | | |
149     C | | |-THE_CORRECTION_STEP :: Step forward to next time step.
150     C | | | | :: Here applied to move restart conditions
151     C | | | | :: (saved in mid timestep) to correct level in
152     C | | | | :: time (only used for pre-c35).
153     C | | | |
154     C | | | |-CALC_GRAD_PHI_SURF :: Return DDx and DDy of surface pressure
155     C | | | |-CORRECTION_STEP :: Pressure correction to momentum
156     C | | | |-CYCLE_TRACER :: Move tracers forward in time.
157     C | | | |-OBCS_APPLY :: Open bndy package. see pkg/obcs
158     C | | | |-SHAP_FILT_APPLY :: Shapiro filter package. see pkg/shap_filt
159     C | | | |-ZONAL_FILT_APPLY :: FFT filter package. see pkg/zonal_filt
160     C | | | |-CONVECTIVE_ADJUSTMENT :: Control static instability mixing.
161     C | | | | |-FIND_RHO :: Find adjacent densities.
162     C | | | | |-CONVECT :: Mix static instability.
163     C | | | | |-TIMEAVE_CUMULATE :: Update convection statistics.
164     C | | | |
165     C | | | |-CALC_EXACT_ETA :: Change SSH to flow divergence.
166     C | | |
167     C | | |-CONVECTIVE_ADJUSTMENT_INI :: Control static instability mixing
168     C | | | | :: Extra time history interactions.
169     C | | | |
170     C | | | |-FIND_RHO :: Find adjacent densities.
171     C | | | |-CONVECT :: Mix static instability.
172     C | | | |-TIMEAVE_CUMULATE :: Update convection statistics.
173     C | | |
174     C | | |-PACKAGES_INIT_VARIABLES :: Does initialisation of time evolving
175     C | | | | :: package data.
176     C | | | |
177     C | | | |-GMREDI_INIT :: GM package. ( see pkg/gmredi )
178     C | | | |-KPP_INIT :: KPP package. ( see pkg/kpp )
179     C | | | |-KPP_OPEN_DIAGS
180     C | | | |-OBCS_INIT_VARIABLES :: Open bndy. package. ( see pkg/obcs )
181     C | | | |-AIM_INIT :: Interm. atmos package. ( see pkg/aim )
182     C | | | |-CTRL_MAP_INI :: Control vector package.( see pkg/ctrl )
183     C | | | |-COST_INIT :: Cost function package. ( see pkg/cost )
184     C | | | |-ECCO_INIT :: ECCO support package. ( see pkg/ecco )
185     C | | | |-INI_FORCING :: Set model initial forcing fields.
186     C | | | | :: Either set in-line or from file as shown.
187     C | | | |-READ_FLD_XY_RS(zonalWindFile)
188     C | | | |-READ_FLD_XY_RS(meridWindFile)
189     C | | | |-READ_FLD_XY_RS(surfQFile)
190     C | | | |-READ_FLD_XY_RS(EmPmRfile)
191     C | | | |-READ_FLD_XY_RS(thetaClimFile)
192     C | | | |-READ_FLD_XY_RS(saltClimFile)
193     C | | | |-READ_FLD_XY_RS(surfQswFile)
194     C | | |
195     C | | |-CALC_SURF_DR :: Calculate the new surface level thickness.
196     C | | |-UPDATE_SURF_DR :: Update the surface-level thickness fraction.
197     C | | |-UPDATE_CG2D :: Update 2d conjugate grad. for Free-Surf.
198     C | | |-STATE_SUMMARY :: Summarize model prognostic variables.
199     C | | |-TIMEAVE_STATVARS :: Time averaging package ( see pkg/timeave ).
200     C | |
201     C | |-WRITE_STATE :: Controlling routine for IO to dump model state.
202     C | | |-WRITE_REC_XYZ_RL :: Single file I/O
203     C | | |-WRITE_FLD_XYZ_RL :: Multi-file I/O
204     C | |
205     C | |-MONITOR :: Monitor state ( see pkg/monitor )
206     C | |-CTRL_MAP_FORCING :: Control vector support package. ( see pkg/ctrl )
207     C====|>|
208     C====|>| ****************************
209     C====|>| BEGIN MAIN TIMESTEPPING LOOP
210     C====|>| ****************************
211     C====|>|
212     C/\ | |-FORWARD_STEP :: Step forward a time-step ( AT LAST !!! )
213     C/\ | | |
214     C/\ | | |-DUMMY_IN_STEPPING :: autodiff package ( pkg/autoduff ).
215     C/\ | | |-CALC_EXACT_ETA :: Change SSH to flow divergence.
216     C/\ | | |-CALC_SURF_DR :: Calculate the new surface level thickness.
217     C/\ | | |-EXF_GETFORCING :: External forcing package. ( pkg/exf )
218     C/\ | | |-EXTERNAL_FIELDS_LOAD :: Control loading time dep. external data.
219     C/\ | | | | :: Simple interpolcation between end-points
220     C/\ | | | | :: for forcing datasets.
221     C/\ | | | |
222     C/\ | | | |-EXCH :: Sync forcing. in overlap regions.
223     C/\ | | |
224     C/\ | | |-THERMODYNAMICS :: theta, salt + tracer equations driver.
225     C/\ | | | |
226     C/\ | | | |-INTEGRATE_FOR_W :: Integrate for vertical velocity.
227     C/\ | | | |-OBCS_APPLY_W :: Open bndy. package ( see pkg/obcs ).
228     C/\ | | | |-FIND_RHO :: Calculates [rho(S,T,z)-Rhonil] of a slice
229     C/\ | | | |-GRAD_SIGMA :: Calculate isoneutral gradients
230     C/\ | | | |-CALC_IVDC :: Set Implicit Vertical Diffusivity for Convection
231     C/\ | | | |
232     C/\ | | | |-OBCS_CALC :: Open bndy. package ( see pkg/obcs ).
233     C/\ | | | |-EXTERNAL_FORCING_SURF:: Accumulates appropriately dimensioned
234     C/\ | | | | :: forcing terms.
235     C/\ | | | |
236     C/\ | | | |-GMREDI_CALC_TENSOR :: GM package ( see pkg/gmredi ).
237     C/\ | | | |-GMREDI_CALC_TENSOR_DUMMY :: GM package ( see pkg/gmredi ).
238     C/\ | | | |-KPP_CALC :: KPP package ( see pkg/kpp ).
239     C/\ | | | |-KPP_CALC_DUMMY :: KPP package ( see pkg/kpp ).
240     C/\ | | | |-AIM_DO_ATMOS_PHYSICS :: Intermed. atmos package ( see pkg/aim ).
241     C/\ | | | |-GAD_ADVECTION :: Generalised advection driver (multi-dim
242     C/\ | | | | advection case) (see pkg/gad).
243     C/\ | | | |-CALC_COMMON_FACTORS :: Calculate common data (such as volume flux)
244     C/\ | | | |-CALC_DIFFUSIVITY :: Calculate net vertical diffusivity
245     C/\ | | | | |
246     C/\ | | | | |-GMREDI_CALC_DIFF :: GM package ( see pkg/gmredi ).
247     C/\ | | | | |-KPP_CALC_DIFF :: KPP package ( see pkg/kpp ).
248     C/\ | | | |
249     C/\ | | | |-CALC_GT :: Calculate the temperature tendency terms
250     C/\ | | | | |
251     C/\ | | | | |-GAD_CALC_RHS :: Generalised advection package
252     C/\ | | | | | :: ( see pkg/gad )
253     C/\ | | | | |-EXTERNAL_FORCING_T :: Problem specific forcing for temperature.
254     C/\ | | | | |-ADAMS_BASHFORTH2 :: Extrapolate tendencies forward in time.
255     C/\ | | | | |-FREESURF_RESCALE_G :: Re-scale Gt for free-surface height.
256     C/\ | | | |
257     C/\ | | | |-TIMESTEP_TRACER :: Step tracer field forward in time
258     C/\ | | | |
259     C/\ | | | |-CALC_GS :: Calculate the salinity tendency terms
260     C/\ | | | | |
261     C/\ | | | | |-GAD_CALC_RHS :: Generalised advection package
262     C/\ | | | | | :: ( see pkg/gad )
263     C/\ | | | | |-EXTERNAL_FORCING_S :: Problem specific forcing for salt.
264     C/\ | | | | |-ADAMS_BASHFORTH2 :: Extrapolate tendencies forward in time.
265     C/\ | | | | |-FREESURF_RESCALE_G :: Re-scale Gs for free-surface height.
266     C/\ | | | |
267     C/\ | | | |-TIMESTEP_TRACER :: Step tracer field forward in time
268     C/\ | | | |
269     C/\ | | | |-CALC_GTR1 :: Calculate other tracer(s) tendency terms
270     C/\ | | | | |
271     C/\ | | | | |-GAD_CALC_RHS :: Generalised advection package
272     C/\ | | | | | :: ( see pkg/gad )
273     C/\ | | | | |-EXTERNAL_FORCING_TR:: Problem specific forcing for tracer.
274     C/\ | | | | |-ADAMS_BASHFORTH2 :: Extrapolate tendencies forward in time.
275     C/\ | | | | |-FREESURF_RESCALE_G :: Re-scale Gs for free-surface height.
276     C/\ | | | |
277     C/\ | | | |-TIMESTEP_TRACER :: Step tracer field forward in time
278     C/\ | | | |-OBCS_APPLY_TS :: Open bndy. package (see pkg/obcs ).
279     C/\ | | | |-FREEZE :: Limit range of temperature.
280     C/\ | | | |
281     C/\ | | | |-IMPLDIFF :: Solve vertical implicit diffusion equation.
282     C/\ | | | |-OBCS_APPLY_TS :: Open bndy. package (see pkg/obcs ).
283     C/\ | | | |
284     C/\ | | | |-AIM_AIM2DYN_EXCHANGES :: Inetermed. atmos (see pkg/aim).
285     C/\ | | | |-EXCH :: Update overlaps
286     C/\ | | |
287     C/\ | | |-DYNAMICS :: Momentum equations driver.
288     C/\ | | | |
289     C/\ | | | |-CALC_GRAD_PHI_SURF :: Calculate the gradient of the surface
290     C/\ | | | | Potential anomaly.
291     C/\ | | | |-CALC_VISCOSITY :: Calculate net vertical viscosity
292     C/\ | | | | |-KPP_CALC_VISC :: KPP package ( see pkg/kpp ).
293     C/\ | | | |
294     C/\ | | | |-CALC_PHI_HYD :: Integrate the hydrostatic relation.
295     C/\ | | | |-MOM_FLUXFORM :: Flux form mom eqn. package ( see
296     C/\ | | | | pkg/mom_fluxform ).
297     C/\ | | | |-MOM_VECINV :: Vector invariant form mom eqn. package ( see
298     C/\ | | | | pkg/mom_vecinv ).
299     C/\ | | | |-TIMESTEP :: Step momentum fields forward in time
300     C/\ | | | |-OBCS_APPLY_UV :: Open bndy. package (see pkg/obcs ).
301     C/\ | | | |
302     C/\ | | | |-IMPLDIFF :: Solve vertical implicit diffusion equation.
303     C/\ | | | |-OBCS_APPLY_UV :: Open bndy. package (see pkg/obcs ).
304     C/\ | | | |
305     C/\ | | | |-TIMEAVE_CUMUL_1T :: Time averaging package ( see pkg/timeave ).
306     C/\ | | | |-TIMEAVE_CUMUATE :: Time averaging package ( see pkg/timeave ).
307     C/\ | | | |-DEBUG_STATS_RL :: Quick debug package ( see pkg/debug ).
308     C/\ | | |
309     C/\ | | |-CALC_GW :: vert. momentum tendency terms ( NH, QH only ).
310     C/\ | | |
311     C/\ | | |-UPDATE_SURF_DR :: Update the surface-level thickness fraction.
312     C/\ | | |
313     C/\ | | |-UPDATE_CG2D :: Update 2d conjugate grad. for Free-Surf.
314     C/\ | | |
315     C/\ | | |-SOLVE_FOR_PRESSURE :: Find surface pressure.
316     C/\ | | | |-CALC_DIV_GHAT :: Form the RHS of the surface pressure eqn.
317     C/\ | | | |-CG2D :: Two-dim pre-con. conjugate-gradient.
318     C/\ | | | |-CG3D :: Three-dim pre-con. conjugate-gradient solver.
319     C/\ | | |
320     C/\ | | |-THE_CORRECTION_STEP :: Step forward to next time step.
321     C/\ | | | |
322     C/\ | | | |-CALC_GRAD_PHI_SURF :: Return DDx and DDy of surface pressure
323     C/\ | | | |-CORRECTION_STEP :: Pressure correction to momentum
324     C/\ | | | |-CYCLE_TRACER :: Move tracers forward in time.
325     C/\ | | | |-OBCS_APPLY :: Open bndy package. see pkg/obcs
326     C/\ | | | |-SHAP_FILT_APPLY :: Shapiro filter package. see pkg/shap_filt
327     C/\ | | | |-ZONAL_FILT_APPLY :: FFT filter package. see pkg/zonal_filt
328     C/\ | | | |-CONVECTIVE_ADJUSTMENT :: Control static instability mixing.
329     C/\ | | | | |-FIND_RHO :: Find adjacent densities.
330     C/\ | | | | |-CONVECT :: Mix static instability.
331     C/\ | | | | |-TIMEAVE_CUMULATE :: Update convection statistics.
332     C/\ | | | |
333     C/\ | | | |-CALC_EXACT_ETA :: Change SSH to flow divergence.
334     C/\ | | |
335     C/\ | | |-DO_FIELDS_BLOCKING_EXCHANGES :: Sync up overlap regions.
336     C/\ | | | |-EXCH
337     C/\ | | |
338     C/\ | | |-FLT_MAIN :: Float package ( pkg/flt ).
339     C/\ | | |
340     C/\ | | |-MONITOR :: Monitor package ( pkg/monitor ).
341     C/\ | | |
342     C/\ | | |-DO_THE_MODEL_IO :: Standard diagnostic I/O.
343     C/\ | | | |-WRITE_STATE :: Core state I/O
344     C/\ | | | |-TIMEAVE_STATV_WRITE :: Time averages. see pkg/timeave
345     C/\ | | | |-AIM_WRITE_DIAGS :: Intermed. atmos diags. see pkg/aim
346     C/\ | | | |-GMREDI_DIAGS :: GM diags. see pkg/gmredi
347     C/\ | | | |-KPP_DO_DIAGS :: KPP diags. see pkg/kpp
348     C/\ | | |
349     C/\ | | |-WRITE_CHECKPOINT :: Do I/O for restart files.
350     C/\ | |
351     C/\ | |-COST_TILE :: Cost function package. ( see pkg/cost )
352     C<===|=|
353     C<===|=| **************************
354     C<===|=| END MAIN TIMESTEPPING LOOP
355     C<===|=| **************************
356     C<===|=|
357     C | |-COST_FINAL :: Cost function package. ( see pkg/cost )
358     C |
359     C |-WRITE_CHECKPOINT :: Final state storage, for restart.
360     C |
361     C |-TIMER_PRINTALL :: Computational timing summary
362     C |
363     C |-COMM_STATS :: Summarise inter-proc and inter-thread communication
364     C :: events.
365     C \ev
366     C
367 cnh 1.41 C
368     CEOI
369    
370 cnh 1.1
371 adcroft 1.18 #include "CPP_OPTIONS.h"
372 cnh 1.1
373 cnh 1.41 CBOP
374    
375     C !ROUTINE: THE_MODEL_MAIN
376    
377     C !INTERFACE:
378 cnh 1.1 SUBROUTINE THE_MODEL_MAIN(myThid)
379 adcroft 1.24 IMPLICIT NONE
380 cnh 1.41
381     C !DESCRIPTION: \bv
382     C *==========================================================*
383     C | SUBROUTINE THE_MODEL_MAIN
384     C | o Master controlling routine for model using the MITgcm
385     C | UV parallel wrapper.
386     C *==========================================================*
387     C | THE_MODEL_MAIN is invoked by the MITgcm UV parallel
388     C | wrapper with a single integer argument "myThid". This
389     C | variable identifies the thread number of an instance of
390     C | THE_MODEL_MAIN. Each instance of THE_MODEL_MAIN works
391     C | on a particular region of the models domain and
392     C | synchronises with other instances as necessary. The
393     C | routine has to "understand" the MITgcm parallel
394     C | environment and the numerical algorithm. Editing this
395     C | routine is best done with some knowledge of both aspects.
396     C | Notes
397     C | =====
398     C | C*P* comments indicating place holders for which code is
399     C | presently being developed.
400     C *==========================================================*
401     C \ev
402    
403     C !CALLING SEQUENCE:
404     C THE_MODEL_MAIN()
405     C |
406     C |
407     C |--INITIALISE_FIXED
408     C | o Set model configuration (fixed arrays)
409     C | Topography, hydrography, timestep, grid, etc..
410     C |
411     C |--CTRL_UNPACK o Derivative mode. Unpack control vector.
412     C |
413     C |--ADTHE_MAIN_LOOP o Main timestepping loop for combined
414     C | prognostic and reverse mode integration.
415     C |
416     C |--CTRL_PACK o Derivative mode. Unpack control vector.
417     C |
418     C |--GRDCHK_MAIN o Gradient check control routine.
419     C |
420     C |--THE_MAIN_LOOP o Main timestepping loop for pure prognostic
421     C | integration.
422     C |
423     C |--WRITE_CHECKPOINT o Write retsart information.
424     C |
425     C |--TIMER_PRINTALL o Print out timing statistics.
426     C |
427     C |--COMM_STATS o Print out communication statistics.
428    
429     C !USES:
430 cnh 1.1 C == Global variables ===
431     #include "SIZE.h"
432     #include "EEPARAMS.h"
433     #include "PARAMS.h"
434 adcroft 1.26 #include "DYNVARS.h"
435 adcroft 1.27 #ifdef ALLOW_NONHYDROSTATIC
436 adcroft 1.26 #include "CG3D.h"
437 adcroft 1.27 #endif
438 cnh 1.1
439 heimbach 1.37 #ifdef ALLOW_AUTODIFF_TAMC
440     #include "tamc.h"
441     #endif
442    
443 cnh 1.41 C !INPUT/OUTPUT PARAMETERS:
444 cnh 1.1 C == Routine arguments ==
445     C myThid - Thread number for this instance of the routine.
446 cnh 1.6 INTEGER myThid
447 cnh 1.1
448 cnh 1.41 C !LOCAL VARIABLES:
449 cnh 1.1 C == Local variables ==
450 cnh 1.7 C Note: Under the multi-threaded model myCurrentIter and
451     C myCurrentTime are local variables passed around as routine
452     C arguments. Although this is fiddly it saves the need to
453     C impose additional synchronisation points when they are
454     C updated.
455 jmc 1.34 C myCurrentTime - Time counter for this thread
456     C myCurrentIter - Iteration counter for this thread
457 heimbach 1.44 INTEGER I
458     INTEGER bi,bj
459 jmc 1.34 INTEGER myCurrentIter
460     _RL myCurrentTime
461 cnh 1.41 CEOP
462 cnh 1.1
463 adcroft 1.19 C-- This timer encompasses the whole code
464 heimbach 1.45 CALL TIMER_START('ALL [THE_MODEL_MAIN]',myThid)
465 adcroft 1.19
466 adcroft 1.32 C-- Set model configuration (fixed arrays)
467 heimbach 1.45 CALL TIMER_START('INITIALISE_FIXED [THE_MODEL_MAIN]',myThid)
468 adcroft 1.32 CALL INITIALISE_FIXED( myThid )
469 heimbach 1.45 CALL TIMER_STOP ('INITIALISE_FIXED [THE_MODEL_MAIN]',myThid)
470 adcroft 1.26
471 jmc 1.34 myCurrentTime = startTime
472     myCurrentIter = nIter0
473    
474 heimbach 1.40 #if ( defined (ALLOW_ADJOINT_RUN) || \
475 heimbach 1.45 defined (ALLOW_TANGENTLINEAR_RUN) || \
476 heimbach 1.40 defined (ALLOW_GRADIENT_CHECK) || \
477     defined (ALLOW_ECCO_OPTIMIZATION) )
478 heimbach 1.37
479     _BEGIN_MASTER( mythid )
480     IF (myProcId .eq. 0) THEN
481 heimbach 1.45 CALL TIMER_START('CTRL_UNPACK [THE_MODEL_MAIN]',mythid)
482 heimbach 1.37 CALL CTRL_UNPACK( mycurrentiter, mycurrenttime, mythid )
483 heimbach 1.45 CALL TIMER_STOP ('CTRL_UNPACK [THE_MODEL_MAIN]',mythid)
484 heimbach 1.37 ENDIF
485     _END_MASTER( mythid )
486     _BARRIER
487    
488 heimbach 1.44 CALL COST_DEPENDENT_INIT ( mythid )
489     _BARRIER
490    
491 heimbach 1.45 #if ( defined (ALLOW_ADJOINT_RUN) || \
492     defined (ALLOW_ECCO_OPTIMIZATION) )
493     CALL TIMER_START('ADTHE_MAIN_LOOP [ADJOINT RUN]',mythid)
494 heimbach 1.39 CALL ADTHE_MAIN_LOOP ( mythid )
495 heimbach 1.45 CALL TIMER_STOP ('ADTHE_MAIN_LOOP [ADJOINT RUN]',mythid)
496 heimbach 1.37 _BARRIER
497 heimbach 1.44 #elif (defined (ALLOW_TANGENTLINEAR_RUN))
498 heimbach 1.45 CALL TIMER_START('G_THE_MAIN_LOOP [TANGENT RUN]',mythid)
499 heimbach 1.44 CALL G_THE_MAIN_LOOP ( myCurrentTime, myCurrentIter, myThid )
500 heimbach 1.45 CALL TIMER_STOP ('G_THE_MAIN_LOOP [TANGENT RUN]',mythid)
501 heimbach 1.44 _BARRIER
502 heimbach 1.45 #endif
503 heimbach 1.44
504     _BEGIN_MASTER( mythid )
505     IF (myProcId .eq. 0) THEN
506 heimbach 1.45 CALL TIMER_START('CTLR_PACK [THE_MODEL_MAIN]',mythid)
507 heimbach 1.44 call CTRL_PACK( mycurrentiter, mycurrenttime, mythid )
508 heimbach 1.45 CALL TIMER_STOP ('CTLR_PACK [THE_MODEL_MAIN]',mythid)
509 heimbach 1.44 ENDIF
510     _END_MASTER( mythid )
511     _BARRIER
512    
513 heimbach 1.39 #else /* ALLOW_ADJOINT_RUN undef */
514 heimbach 1.37
515 adcroft 1.32 C-- Call time stepping loop of full model
516 heimbach 1.45 CALL TIMER_START('THE_MAIN_LOOP [THE_MODEL_MAIN]',myThid)
517 heimbach 1.44 CALL THE_MAIN_LOOP( myCurrentTime, myCurrentIter, myThid )
518 heimbach 1.45 CALL TIMER_STOP ('THE_MAIN_LOOP [THE_MODEL_MAIN]',myThid)
519 adcroft 1.12
520 heimbach 1.39 #endif /* ALLOW_ADJOINT_RUN */
521 heimbach 1.38
522 heimbach 1.45 #ifdef ALLOW_GRADIENT_CHECK
523     if (useGrdchk) then
524     CALL TIMER_START('GRDCHK_MAIN [THE_MODEL_MAIN]',mythid)
525     CALL GRDCHK_MAIN( mythid )
526     CALL TIMER_STOP ('GRDCHK_MAIN [THE_MODEL_MAIN]',mythid)
527     _BARRIER
528     end if
529     #endif
530    
531 heimbach 1.38 C-- Final checkpoint (incase the in-loop checkpoint was missed)
532 heimbach 1.45 CALL TIMER_START('WRITE_CHECKPOINT [THE_MODEL_MAIN]',myThid)
533 heimbach 1.38 CALL WRITE_CHECKPOINT(
534     & .TRUE., myCurrentTime, myCurrentIter, myThid )
535 heimbach 1.45 CALL TIMER_STOP ('WRITE_CHECKPOINT [THE_MODEL_MAIN]',myThid)
536 adcroft 1.19
537 heimbach 1.45 CALL TIMER_STOP ('ALL [THE_MODEL_MAIN]',myThid)
538 cnh 1.7
539 adcroft 1.19 C-- Write timer statistics
540 cnh 1.20 IF ( myThid .EQ. 1 ) THEN
541     CALL TIMER_PRINTALL( myThid )
542     CALL COMM_STATS
543     ENDIF
544 cnh 1.1
545     RETURN
546     END

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