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revision 1.9 by adcroft, Thu Jul 2 14:20:04 1998 UTC revision 1.155 by mlosch, Wed May 14 09:22:09 2003 UTC
# Line 2  $Header$ Line 2  $Header$
2    
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    checkpoint50e_post
6    o make KPP work with PTRACERS
7     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
8       nearly a copy of kpp_transport_s
9     - there is no analogue to SurfaceTendencyS, so I have to use
10       gPtr(of the surface layer) instead
11    o add a new platform SunFire+mpi (SunFire 15000) to genmake
12    checkpoint50e_pre
13    
14    checkpoint50d_post
15    o change kpp output from multiple-record state files to single-record state
16      files analogous to write_state.F
17    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
18      analogous to the cg2d-related output.
19    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
20      so that writing to internal file fn (with length 512) fails.
21    checkpoint50d_pre
22    
23    checkpoint50c_post
24    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
25    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
26    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
27    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
28    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
29    
30    checkpoint50c_pre
31    Merging from release1_p13:
32    o bug fix for pkg/seaice dynamic solver
33    o Added SEAICE_initialHEFF to pkg/seaice
34    
35    checkpoint50b_post
36    o store u*,v* in gU,V instead of in guNm1,gvNm1
37    o in order to put the momForcing out of the Adams-Bashforth:
38      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
39      to timestep.F
40    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
41    o re-generate output for highly sensitive test-exp:
42       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
43    
44    checkpoint50b_pre
45    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
46    o corrected CPP option mismatch in exf_Bulk... functions for case
47      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
48    
49    checkpoint50a_post
50    o Bug fix for merging between c50 and KPP.
51      ikey was passed from thermodynamics to kpp_calc via
52      common block rather than being recomputed in kpp_calc,
53      in contradiction with new key itdkey.
54      New key ikppkey created, and tamc.h headers updated.
55    
56    checkpoint50
57    - 2nd step of merge with ecco-branch:
58      merge changes in ecco-branch back into main trunk
59    - bug fix in find_alpha
60    - more storing in gmredi_calc_tensor.F, kpp_routines.F
61    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
62    - merged some sliced AD support routines
63    
64    checkpoint49
65    merged from ecco-branch:
66    o exf:
67      - Enable initialisation of forcing fields to constant
68        (runtime) values.
69      - in exf_getffields.F
70        Reduce i-/j-loop to interior domain, discarding overlaps.
71        That also fixes wrong TAF-key computations for key_1, key_2
72        with bulf formulae.
73      - exf_init.F modify #ifdef for exf_init_evap
74      - exf_getffieldrec.F, ctrl_getrec.F
75        The following INT-usages are not safe:
76          fldsecs  = int(fldsecs/fldperiod)*fldperiod
77          fldcount = int(fldsecs/fldperiod) + 1
78        and were modified.
79    o autodiff: checkpoint_lev...
80      - updated storing for bulk formulae (some arrays were missing)
81      - added state for seaice package
82      - synchronized with main branch
83    o DIVA:
84      Modif.s in
85      - the_main_loop.F
86      - the_model_main.F
87      and added cost_final_restore.F cost_final_store.F
88      o With these changes, it is possible to fully separate
89        the first forward run to compute the cost function (mdthe_main_loop)
90        and adjoint runs over individual DIVA intervals (adthe_main_loop)
91        into separate model executions.
92        This enables better tuning of DIVA to given queue sizes.
93      o Loss of cost function value in consecutive DIVA runs is
94        fixed by storing to 'costfinal' file.
95      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
96        beginning/end of adjoint integration is accounted for.
97      The current changes apply to TAF-1.4.26.
98      TAF has one remaining bug, requiring one manual change
99      (see MITgcm manual).
100    o cal: synchronized between MAIN and ecco-branch
101    
102    checkpoint48i_post
103    o Changes to restore differentiability of code w.r.t. previous tag
104      (mostly adding new routines to make list and replacing
105      pressure by totPhiHyd).
106    o Updated and merged grdchk package
107      - has both ADM and TLM checks
108      - works for single- and multi-proc.
109      - output cleaned
110      - worked successfully for parallel DIVA
111    o genmake:
112      - Adding -platform=SP4
113      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
114    o Modif. for DIVA:
115      ctrl_unpack should not be called in intermediate DIVA interval.
116      (similar thing would apply for active files such as
117      tbar, sbar, psbar, which should not be reinitialised;
118      only relevant for ecco-branch)
119    
120    checkpoint48h_post
121    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
122    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
123    o Added SEAICE_initialHEFF to pkg/seaice
124    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
125    
126    checkpoint48g_post
127    --- EOS:
128    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
129      store total Potential in totPhyHyd for diagnostics & EOS.
130    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
131    --- Pressure/geopotential gradient:
132    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
133    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
134      ( changes results of global_ocean_pressure )
135    o NLFS + z-coord.: add eta*Rho' contribution.
136    o accurate phiHyd when using interface-W at the middle between 2 centers
137     ( changes results of ideal_2D_oce )
138    o includes r* 2nd term in potential gradient.
139    
140    checkpoint48f_post
141    Merging from release1_p12:
142    o Modifications for using pkg/exf with pkg/seaice
143      - improved description of the various forcing configurations
144      - added basic radiation bulk formulae to pkg/exf
145      - units/sign fix for evap computation in exf_getffields.F
146      - updated verification/global_with_exf/results/output.txt
147    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
148      (SBO) core products, including oceanic mass, center-of-mass,
149      angular, and bottom pressure (see pkg/sbo/README.sbo).
150    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
151      to avoid negative values in shallow regions.
152      - updated verification/natl_box/results/output.txt
153      - updated verification/lab_sea/results/output.txt
154    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
155    o Added useSingleCpuIO option (see PARAMS.h).
156    o Updated useSingleCpuIO option in mdsio_writefield.F to
157      work with multi-field files, e.g., for single-file pickup.
158    o pkg/seaice:
159      - bug fix in growth.F: QNET for no shortwave case
160      - added HeffFile for specifying initial sea-ice thickness
161      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
162    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
163      kpp_transport_t.F, forward_step.F, and the_main_loop.F
164    o pkg/seaice:
165      - adjoint-friendly modifications
166      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
167    
168    checkpoint48e_post
169    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
170    o dynamics: change definition of computational domain & adapt mom_fluxform
171      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
172    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
173        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
174        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
175        global_ocean.90x40x15 global_with_exf global_ocean_pressure
176        inverted_barometer solid-body.cs-32x32x1
177      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
178    
179    checkpoint48d_post
180    o in preparation for r*:
181     a) use pre-computed gradient of hydrostatic potential:
182        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
183     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
184        => affects results of glob_oce_pressure (different truncation error)  
185      update output.txt of ideal_2D_oce & global_ocean_pressure
186    
187    checkpoint48d_pre
188    o in preparation for r*:
189      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
190      pass the 2 comp. of the grad. as arguments to momentum S/R.
191      but for the moment, only used if it does not change the results.
192    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
193    
194    checkpoint48c_post
195    Modifications in treatment of initial flux forcing controls
196    to avoid extra storing of flux fields.
197    
198    checkpoint48c_pre
199    o Added tidal_basin_2d experiment (currently 1D!)
200    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
201    
202    checkpoint48b_post
203    o r* coordinate added in #ifdef NONLIN_FRSURF block.
204     (modification to pressure gradient not yet implemented)
205    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
206      (for U & V) that are used for vertical advection of momentum.
207    
208    checkpoint48a_post
209    o In preparation for r*, use temp. array to compute vertical transport
210       in flux-form momentum pkg. => change results of few test-exp.
211      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
212                        lab_sea, natl_box & plume_on_slope
213    
214    checkpoint48
215    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
216    
217    checkpoint47j_post
218    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
219    o moved adexch from forward_step to addummy_in_stepping
220    o added exch in ctrl_map_...
221    o aveFreq.=0. at end of cost_final to avoid overwrite in
222      reverse checkpointing loop
223    o Yet more changes in gmredi:
224      * adgmredi_calc_tensor
225        avoiding all recomputation of gmredi_slope_limit
226      * adgmredi_x/y/rtransport
227        added flag for excessive storing to avoid recomp. of
228        u/v/rtans, dTdx/y/z
229        -> this is not really necessary and very memory-consuming
230      * adgmredi_slope_psi:
231        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
232      * gmredi_slope_limit
233        re-activated full calculation of taperfct for case 'ac02'
234    o updating verification/ adjoints of carbon, global_ocean.90x40x15
235    
236    checkpoint47i_post
237    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
238    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
239      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
240    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
241    o gmredi: fix few bugs.
242    
243    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
244    This will be a good checkpoint to plug into the ecco-branch.
245    o few modif.'s to get latest version adjointed
246      (mainly kick out code in ini_linear_phisurf)
247    o modif's to run adjoint with exactConserv
248    o case GM_BOLUS_ADVEC should be cleaned
249      S/R gmredi_slope_psi should be cleaned
250    o verification/carbon now has exactConserv=.TRUE.
251    
252    checkpoint47g_post
253    o time-average AIM output: becomes independent from statvars time-average
254      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
255    o After TAF bug fix:
256      Tested adjoint of gmredi package.
257      Tests were done with checkpoint47 rather than with latest
258      checkpoint47f_post since the latter is broken for the adjoint
259      verification/carbon/ contains both ADM and TLM gradient checks.
260    Here they are, before they get changed/lost/stolen.
261    Mostly modif.'s to fix numerical sensitivities.
262    Gradient checks OK for
263    - GM_taper_scheme:
264      * clipping
265      * ac02
266      * linear
267      * glw91
268      * dm95
269      * ldd97
270    - GMREDI_OPTIONS:
271      * GM_VISBECK_VARIABLE_K
272      * GM_NON_UNITY_DIAGONAL
273      * GM_EXTRA_DIAGONAL
274      * GM_BOLUS_ADVEC
275    in conjunction with data.gmredi parameters to be checked in
276    in a few minutes under verification/carbon/code/
277    
278    checkpoint47f_post
279    Merging from release1_p10:
280    o modifications for using pkg/exf with pkg/seaice
281      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
282        and SEAICE_EXTERNAL_FLUXES
283      - pkg/exf CPP options EXF_READ_EVAP and
284        EXF_NO_BULK_COMPUTATIONS
285      - usage examples are Experiments 8 and 9 in
286        verification/lab_sea/README
287      - verification/lab_sea default experiment now uses
288        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
289    
290    checkpoint47e_post
291    o created a tag prior to creating a branch
292    
293    checkpoint47d_post
294    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
295      at the bottom boundary had an erroneous half slip boundary condition
296    o added bottom drag and no slip boundary condition capabilities to
297      oceanic pressure coordinates code
298    o added new verification experiment global_ocean_pressure, this experiment is
299      also described in the tutorial section of the manual
300    checkpoint47d_pre
301    
302    checkpoint47c_post
303    o Added a verification experiment for a global cubed-sphere ocean run
304      -  verification/global_ocean.cubed32x32x30
305      -  uses pkg/therm_seaice and pkg/bulk_forcing
306    
307    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
308    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
309      when using P-coordinate; only implemented for atmospheric config.
310    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
311      NOTES: requires option NONLIN_FRSURF to be "#define".
312    o update advect_xz/results/output.txt (left from checkpoint44g_post)
313    
314    checkpoint47b_post
315    Merging from release1_p9:
316    o pkg/seaice
317      - removed GOTO's and added taf directives
318      - double precision constants to reduce the g77 (Linux)
319        to F77 (SGI) differences reported in release1_p8
320    o tools/genmake
321      - added SGI options
322    o verification/testscript
323      - updated to that of checkpoint47a_post
324    o verification/global_ocean.90x40x15/input/eedata
325      - modified for SGI f77 compatibility
326    o verification/lab_sea
327      - added description of sea-ice model
328      - added missing matlab routines
329      - added test of thermodynamics parallelization
330    
331    checkpoint47a_post
332    o new pkg: aim_v23
333     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
334       for now, keep the same surface forcing as before.
335     - Part-Cell implemented into AIM; check that Heat & Water are conserved
336     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
337     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
338    o add diagnostic of surface correction term in monitor output
339    
340    o bulk_force and therm_seaice
341    - Two packages:  bulk_force (Bulk forcing)
342      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
343    - Earlier integration from Stephaine Dutkiewicz
344      and Patrick Heimbach.
345    - Two ifdef statements for compile time,
346       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
347    
348    checkpoint47
349    differentiable version of checkpoint46n_post
350    o bug fix in quasihydrostaticterms
351    o * "clean" adjoint code (in terms of extensive recomputations)
352        can now be obtained for all GMREDI options (i.e. for
353        - GM_VISBECK_VARIABLE_K
354        - GM_NON_UNITY_DIAGONAL
355        - GM_EXTRA_DIAGONAL
356        - GM_BOLUS_ADVEC )
357      * However, wrong gradient check problem remains unsolved.
358      * New CPP options have been introduced for different
359        tapering schemes
360    o external_fields_load now part of differentiation list
361    o pressure needs multiple storing;
362      would be nice to have store_pressure at beginning or
363      end of forward_step, e.g. by having phiHyd global (5-dim.)
364      (NB: pressure is needed for certain cases in find_rho,
365      which is also invoked through convective_adjustment).
366    o recomputations in find_rho for cases
367     'JMD95'/'UNESCO' or 'MDJWF' are OK.
368    o #define ATMOSPHERIC_LOADING should be differentiable
369    o ini_forcing shifted to begining of initialise_varia
370    o Incorporating QNVS line search routines into MITgcm
371      (this is separate code, and therefore not under pkg)
372      lsopt/, optim/
373    o Updated verification/carbon/
374      - #define GM_VISBECK_VARIABLE_K
375      - GM_taper_scheme    = 'ldd97'    
376    
377    checkpoint46n_post
378    Merging from release1_p8:
379    o verification/natl_box:
380      updating new external_fields_load routine
381    o New package: pkg/seaice
382      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
383      The sea-ice code is based on Hibler (1979-1980).
384      Two sea-ice dynamic solvers, ADI and LSR, are included.
385      In addition to computing prognostic sea-ice variables and diagnosing
386      the forcing/external data fields that drive the ocean model,
387      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
388      The implied surface heat flux is then stored in variable
389      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
390      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
391      non-local transport term.  Because this call precedes model
392      thermodynamics, temperature under sea-ice may not be "exactly" at
393      the freezing point by the time theta is dumped or time-averaged.
394      N.B.: fairly large differences in accuracy occur across
395            different platforms/compilers; comparison between
396            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
397            generated output gives:
398       T           S           U           V
399      C D M    c        m  s        m  s        m  s        m  s
400      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
401      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
402      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
403    
404      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
405    o GAD:
406      - generated new common blocks to account for call of
407        same gad routines with differing traceridentities
408        (needed to modify tracerIdentity indices in GAD.h)
409      - generated separate common blocks for case useCubedSphereExchange
410        (Department of Futurology)
411      - parameter lists to gmredi_?transport: added tracerIdentity
412      - added new key indices to tamc.h
413    o external_fields_load:
414      - added this routine to TAF list
415      - needed to make some common blocks global and additional storing
416        along the same lines as exf package (checkpoint_lev?_directives.h)
417    o exf:
418      updated external forcing package
419      - bug fixes carried over from ecco-branch
420        (missing OBCS_OPTIONS.h in two routines)
421      - enable easy to use "no forcing".
422      - added exf I/O for atmospheric loading
423      - added exf I/O for runoff data
424      - transfered scaling between exf <-> MITgcm to exf namelist
425    o Adding new verification experiment global_with_exf.
426      This verification experiment is almost identical to the
427      global_ocean.90x40x15 experiment, except that it uses
428      the exf (and cal) package instead of the
429      external_fields_load routine (cf README file).
430    
431    checkpoint46m_post
432    o modified testscript to return -- when there are no lines of "%MON" output
433    o added new flag "quasiHydrostatic" for QH mode
434      and new routine quasihydrostaticterms()
435    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
436      New routine: mom_u_coriolis_nh()
437    o fixed sign of non-hydrostatic metric terms in u and v equations.
438      Depend on correct sign of gravitySign.
439    o added work.pc* to .cvsignore in aim directories using ifc
440    o introduced flag for controllin non-hydrostatic metric terms
441    o removed gravitySign from PARM04
442    o switched to g77/ifc from pgf77 in aim experiments
443    
444    checkpoint46l_post
445    o made convective adjustment work with pressure coordinates:
446     - changed the direction of k-loop in convective_adjustment.F for the
447       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
448     - adjusted the reference pressure k-index in convective_adjustment.F
449     - adjusted the convection condition in convect.F (in analogy to
450       calc_ivdc.F)
451     - convective_adjustment no longer computes anything on the halos
452     - removed the warnings about negative salinity from find_rho.F and
453       find_alpha.F; instead the new routine look_for_neg_salinity, called
454       at the beginning of find_rho, find_alpha, and find_beta, does a
455       check of the entire slice, if CPP-option
456       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
457    checkpoint46l_pre
458    
459    checkpoint46k_post
460    o fixed the verification/global_ocean.90x40x15 experiment:
461     - new bathymetry (the world according to A., JMC, and M.)
462     - new initial fields and forcing fields (*.bin files)
463     - new POLY3.COEFFS (for the next release one should switch to a full
464       equation of state: JMD95P or MDJWF)
465     - fixed several errors and redundancies in the data file
466     - experiment uses looped cells
467     - added matlab directory with diagnostic scripts for plotting of output
468    
469    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
470     - read AIM physics parameters from a file (data.aimphys)
471     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
472    
473    checkpoint46j_post
474    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
475    o move wVel computation at the end of the time step, in S/R integr_continuity
476    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
477    o update timeave pkg for wVel diagnostic.
478    checkpoint46j_pre
479    
480    checkpoint46i_post
481    o Clean up AIM package (and keep the results unchanged):
482      include CPP_OPTION and use IMPLICT NONE in all routines ;
483      declare all the variables _RL ; use _d 0 for all numerical constants.
484      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
485    
486    checkpoint46h_post
487    o cleaned up the use of rhoNil and rhoConst.
488      - rhoNil should only appear in the LINEAR equation of state, everywhere
489        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
490        and the dynamical equations are all divided by rhoConst
491    o introduced new parameter rhoConstFresh, a reference density of fresh
492      water, to remove the fresh water flux's dependence on rhoNil. The default
493      value is 999.8 kg/m^3
494    o cleanup up external_forcing.F and external_forcing_surf.F
495      - can now be used by both OCEANIC and OCEANICP
496    checkpoint46h_pre
497    
498     Added code to convert surface volume flux (fresh water) into
499     a mass flux when using P coordinates in the ocean (OCEANICP).
500     Note: It assumes you have set rho0=rhoConst=density of fresh water.
501    
502    checkpoint46g_post
503    o Include a new diagnostic variable phiHydLow for the ocean model
504      - in z-coordinates, it is the bottom pressure anomaly
505      - in p-coordinates, it is the sea surface elevation
506      - in both cases, these variable have global drift, reflecting the mass
507        drift in z-coordinates and the volume drift in p-coordinates
508      - included time averaging for phiHydLow, be aware of the drift!
509    o depth-dependent computation of Bo_surf for pressure coordinates
510      in the ocean (buoyancyRelation='OCEANICP')
511      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
512        Theta, Salinity, and Pressure in the parameter list. This routine is
513        presently contained in find_rho.F. This routine does not give the
514        correct density for 'POLY3', which would be a z-dependent reference
515        density.
516    o cleaned up find_rho
517      - removed obsolete 'eqn' from the parameter list.
518    o added two new verification experiments: gop and goz
519      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
520    checkpoint46g_pre
521    
522    checkpoint46f_post
523    o Enable tangent linear (forward mode) gradient checks:
524      - extended active file handling to g_... files
525      - added TANGENT_SIMULATION to theSimulationMode
526      - extended grdchk package accordingly
527    o added tangent linear setup in verification/carbon/code_ftl
528    o added adjoint setup in verification/front_relax/code_ad
529    
530    checkpoint46e_post
531    o Added new equation of state -> MDJWF
532      - EOS of McDougall et al., 2002, JAOT, submitted
533      - caveat: the equation of state is only valid for a smaller (more
534        realistic?) range of values than JMD95P/Z and UNESCO
535      - added masks to the calculation of pressure in store_pressure
536      - added more check values for density in check_eos (ini_eos.F), some of
537        the old check values are out of the range of the MDJWF-eos, so don't
538        expect perfect matches for those
539    checkpoint46e_pre
540    
541    checkpoint46d_post
542    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
543      'OCEANICP', also initialised field pressure correctly in ini_eos in the
544      case of pressure coordinates. eosType='JMD95Z' in
545      combination with buoyancyRelation='OCEANICP' now causes an error.
546    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
547      in find_alpha/beta.
548    checkpoint46d_pre
549    
550    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
551      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
552    
553    checkpoint46c_post
554    o Changes necessary for ocean in p-coordinates
555     -  Added new buoyancy relation = 'OCEANICP'
556     -  Added new parameters = gravitySign (this used to be contained inside
557        the factor dRdZ which I added when we first switched to R coordinates).
558     X GM/Redi is not compatible (yet)
559     X bottom drag and no-slip need to be debugged.
560    checkpoint46c_pre
561    
562    checkpoint46b_post
563    o Added new equation of state -> JMD95Z and JMD95P
564      - EOS of Jackett and McDougall, 1995, JAOT
565      - moved all EOS parameters into EOS.h
566      - new routines ini_eos.F, store_pressure.F
567    o Added UNESCO EOS, but not recommended because it requires
568      in-situ temperature (see JMD95)
569    o Modified formatting for knudsen2.f in utils/knudsen2 and added
570      unesco.f to be used with POLY3
571    checkpoint46b_pre
572    
573    checkpoint46a_post
574    o Added (atmospheric) pressure loading
575      - new field in FFIELDS.h, etc...
576      - new cpp flag ATMOSPHERIC_LOADING
577    o Changed hFacC to _hFacC in calc_phi_hyd.F
578    o Added SHORTWAVE_HEATING to some files for consistency
579    checkpoint46a_pre
580    
581    checkpoint46
582    further merges from release1_p5
583    o new ctrl package
584      - adopted from ECCO environment to enable optimization
585      - added Eliassen Palm fluxes to controls
586    o added Eliassen Palm flux controls to gradient check package
587    o cost package
588      - Compatible with new ctrl package
589      - added Eliassen Palm cost hooks
590      - modif's of existing cost functions
591    o Adjoint-related bug fixes in kpp:
592      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
593      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
594    o autodiff package
595      - flow directives:
596        + new for S/R do_the_model_io
597        + enhanced for S/R checkpoint
598        + new gmredi.flow
599      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
600        disable adcommon.h/g_common.h by default.
601      - fixed problem for adjoint of global_max
602    o modified verification/carbon/
603    o New setup for adjoint of global_ocean
604    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
605    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
606    o incorporated hooks for sponge layer code (external_forcing.F)
607    
608    checkpoint45d_post
609    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
610    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
611      (affects plume_on_slope "cg2d" output)
612    o add new parameter deltaTfreesurf for free-surface time stepping
613    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
614    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
615    o change phiMin in exp1 (to agree with documentation)
616    o add new flags:
617     - T,S forcing inside/outside Adams-Bashforth
618     - turn off temp,salt advection and/or forcing
619     - for each tracer, define internal flag for multiDimAdvection & A-B
620    o monitor: change definition of KE to check conservation of Energy
621    
622    checkpoint45c_post
623    o Removed f90 comments ("!")
624    o Modified initialisations to enable exf package for MITgcm
625      (without invoking ECCO_PACKAGE).
626    o modifications to gradient check package (Martin Losch)
627      - enable centered differences
628      - modified format of standard output
629    
630    checkpoint45b_post
631    o cleaned exchange calls in cg2d
632    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
633    o included CPP option SINGLE_LAYER_MODE in thermodynamics
634      to configure barotropic setup (Martin Losch)
635    o moved some initialisations within bi,bj loop in dynamics
636      (TAF flow dependency)
637    o in initialise_varia, moved call packages_init_variables
638      before convective_adjustment_init
639      (corresponding adjustment of TAF tape initialisation).
640    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
641    
642    checkpoint45a_post
643    o compute Rho over the whole domain (extend iMin,jMin indices)
644    o specific exchange for X-slice domain (case Ny=1)
645    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
646    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
647    
648    checkpoint44h_post = checkpoint45
649    o Fix to restore differentiability:
650      place at which packages_init_variables is called in
651      initialise_varia is crucial for reverse control flow.
652    o modifications in GMRedi to enable stable adjoint
653      (corresponding modif's in thermodynamics, dynamics)
654    o added missing hook for sponge layer code in external_forcing
655    o modified test cost functions
656    o storing in gad_advection (plus removal of write(0,*)!
657    o missing headers TR1.h added in convective_adjustment routines
658    o errorMessageUnit set non-equal zero in eeboot
659      (conflict on some platforms, e.g. IBM SP3)
660    o modified carbon verif.
661    
662    checkpoint44h_pre
663    o vertical grid option: allow to put the Interface at the middle between
664      2 cell-centers ; replace delZ in pkg/kpp by drF.
665    o GM Advective form: Tracers are advected using the residual transport (=
666      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
667    
668    checkpoint44g_post
669    o fix surface correction term in multiDimAdvection (affects plume_on_slope
670      results) ; ifdef missing in thermodynamics.F
671    
672    checkpoint44f_pre,checkpoint44f_post
673    o added PTRACERS package
674      This allows an arbitrary number of passive tracers to be integrated
675      forward simultaneously with the dynamicaly model.
676      + Implemented so far:
677        - basic forward algorithm (time-stepping, advection, diffusion, convection)
678        - I/O and checkpointing
679        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
680      + Not implemented so far:
681        - KPP
682        - OBCS
683      + No specific example supplied (yet) but global_ocean.90x40x15 has the
684        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
685        line in data.pkg.
686      + This package is disabled by default since it increases storage.
687    
688    
689    o testscript: added -cleanup option
690    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
691                 b) enable to filter 2D fields.
692    
693    checkpoint44e_pre,post
694    o re-wrote convective adjustment to use pre-calculated weights
695      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
696      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
697      Original calls to convect() still in place.
698    
699    chkpt44d_pre,post
700    o added missing EXCLUDE_MONITOR flags
701    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
702      (incompatible typ in MIN/MAX expressions caused problems
703      on IBM SP3)
704    o in genmake added variable MAKEDEPEND
705      plus resetting for case SunOS
706    o added timer_stats.c routine for IBM SP3
707    o removed variables in dynamics
708    !!! I forgot to create tag chkpt44d_pre !!!
709    !!! But chkpt44d_pre = chkpt44c_post    !!!
710    
711    o real fresh water flux implemented with non-linear free-surface.
712    
713    chkpt44c_pre,post
714    o few fix (mask in shap_s2, EmPmR in external_field_load,
715      USE_NATURAL_BCS in solve_for_P);
716    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
717    
718    checkpoint44b_pre/_post
719    o merge of relevant stuff from the ecco-branch:
720      - genmake: removed $S64 overwrite for case SunOS
721      - pkg/exf: update and corrections for field swapping and obcs
722      - pkg/ecco: parameter lists for the_model_main, the_main_loop
723                  harmonized between ECCO and MITgcm
724      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
725                      updated checkpointing_lev... lists for obcs
726      - model/src: minor changes in forward_step, plot_field
727                   added directive for divided adjoint in the_main_loop
728      - pkg/mdsio: added mdsio_gl_slice
729    
730    o check parameters & config (chkpt44a_pre,post)
731    o OBC and NonLin_FrSurf.
732    
733    checkpoint44
734    o fix bug in mom_vi_del2uv
735    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
736    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
737    o update AIM experiments (NCEP input files)
738    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
739    o added some stuff for AD
740    
741    checkpoint43
742    o added two new advection tests
743    o added global 4x4 degree ocean test
744    o added test of H&S94 with free surface on cube
745    o some final mods for gradient check, adjoint,...
746    
747    checkpoint42
748      Fixed AD-related problems:
749    o Store directives up-to-date with re-arranged Adams-Bashforth
750      (mainly thermodynamics.F)
751    o New store directives for multi-dim. advection schemes
752      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
753      * new common block and key passkey
754      (mainly gad_advection.F)
755    o Modified store directives for split of dynamics/thermodynamics
756      for the case ALLOW_KPP
757    o Cleaned argument list for timestep_tracer.F
758    
759    checkpoint41
760    o re-formatted/added comments in prologues of key subroutines
761      to work with protex
762    
763    checkpoint40
764    o moved calc_gs, calc_gt and calc_tr1 back to model/src
765    o added FLT (floats) package from Arne along with demo. experiment
766    o re-arranged Adams-Bashforth scheme for tracers to allow easier
767      implementation of forward-in-time forcing terms
768    o more mods for non-linear free-surface including new variable
769    o modified multi-dim method to work on cube
770    o bug fix in KPP (from DM)
771    
772    checkpoint40pre9
773    o added DST advection schemes
774    o fix MPI bug on SGI's
775    o modifications for non-linear free-surface
776    o fixed conditionals for fixed flow/passive tracer only mode
777    o added tension/strain form of stress tensor
778    o changes to commenting of arguments for TAF/TAMC
779    o added/updated many matlab scripts
780    o added multi-dimensional advection method for tracers
781      
782    checkpoint40pre8
783    o new package rw/
784      Added method for dumping intermediate local arrays:
785      mdsio_writetile - same as mdsio_writefield except works from inside
786                        bi,bj loop
787      mdsio_writelocal - same as mdsio_writetile except works for local
788                         arrays
789      write_local_r? - higher-level wrapper for mdsio_writelocal
790      Controlled by diagFreq. Defaults to zero (ie. no dumps)
791      Example given at end of mom_vecinv.F that dumps some local arrays.
792    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
793      control flux-form versus vector invariant code.
794      Switch is runtime flag vectorInvariantMomentum (defaults to false)
795      or genmake -DISABLE ...
796    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
797      (additional storing is now needed for case vecinv;
798      currently nothing implemented to switch this storing off
799      in case fluxform is used since no CPP flag available).
800    
801    checkpoint40pre7
802    o bug fix in dynamics.F
803      calc_viscosity called before k=1,Nr loop.
804    o added some #ifdef's ALLOW_PASSIVE_TRACER
805    o cleaned initialisations in ctrl_map_ini
806      related to TAF
807    
808    checkpoint40pre6
809    o split dynamics into thermodynamics & dynamics
810    o corresponding split of calc_diffusivity into
811      calc_diffusivity, calc_viscosity
812      (kpp_calc_diff, kpp_calc_visc).
813    o Added diffkr, kapgm to control variables
814    o bug fix in gmredi_slope_limit for ldd97
815    
816    checkpoint40pre5
817    o proper initialization of Adams-Bashforth time stepping
818      + uses forward step for very first step of model (iter=0)
819    o re-generated *all* output since almost all output is modified by this
820      change (sorry but we've been putting this one off for about 2 years)
821      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
822        *not* regenerated since they are already out of date and I don't
823        want to create the impression that they are suddenly working.
824    o removed KAP stuff for DEC's
825    o modified/added many .cvsignore files in */code and */input
826    o added new expt "solid-body.cs-32x32x1"
827      + this uses an alternative form of ini_curvilinear_grid.F which
828        is not necessarily any better than the current one...
829    
830    checkpoint40pre4
831    o added re-initialisations of utrans,vtrans,rtrans in
832      calc_common_factors which are crucial for TAF.
833    o extended iMin,jMin range for calc_common_factors,
834      calc_diffusivity
835    o added option ALLOW_PASSIVE_TRACER
836    o a few minor updates and fixes
837    
838    checkpoint40pre3
839    o created calc_gtr1.F for gad package
840    o split the_main_loop and re-introduced forward_step
841    o some recomputations of nIter0 for TAMC
842    
843    checkpoint40pre2
844    o Updated to latest branch of AJA, JMC
845    o Added gradient check package
846    o Added routines for passive tracer handling
847    o Added carbon sequestration sensitivity experiment
848    
849    checkpoint39
850     o Modifications and fixes to support TAMC
851       (mainly missing or wrong directives)
852     o Corrected common blocks when fooling TAMC to produce adjoint I/O
853       in addummy_in_stepping
854     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
855     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
856     o Included following packages:
857       cal: calendar
858       exf: external forcing
859       ecco: essential routines to control use of cal, exf
860             (NB: this is not the full ECCO environment)
861     o disabled some packages by default in genmake
862    
863    checkpoint38
864     o see notes_c37_adj.txt
865     o corrected wrong layer index in external_forcing_t
866     o replaced the_main_loop/forward_step by the_main_loop
867     o removed forceoutput from write_state
868       (replaced criteria for initial/final state)
869     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
870    
871    checkpoint37
872     o mdsio.F routine split and packaged in pkg/mdsio
873       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
874        used unless genmake -disable=mdsio)
875     o allow a more precise surface-geopotential gradient for the atmosphere
876       taking into account the change in space of Alpha (=1/rho) at the surface.
877     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
878       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
879     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
880       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
881       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
882     o Time-Average diagnostics defined as a pseudo package "timeave".
883     o pickup files : old pickup (before c35) did not work with new code (c35
884       and after) unless activating 2 commented lines in initialise-varia.
885     o Non-Hydrostatic pickup file Pb fixed.
886     o bug with Rigid-lid version (since c35) fixed.  
887    
888    checkpoint36
889     o implement Crank-Nickelson barotropic time-stepping
890     o recover Time-Average diagnostics
891     o fix Pb in checkpoint (PR#19)
892     o AIM become a standard package ; clean unused CPP_kees
893    
894    checkpoint35
895     o subtantial rewrite of dynamics.f
896     o allows staggered time-stepping
897     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
898     o added bottom drag (linear + quadratic)
899    
900    checkpoint34
901     o Modified exchange routines for correct reverse simulation.
902     o Added verification output to comply with bug fix in impldiff.F
903       as of c33 (exp2, natl_box).
904     o Corrected store directives in dynamics.F
905     o Corrected array boundaries in impldiff.F
906     o Corrected array dimensions in gmredi.
907       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
908     o Added routine GLOBAL_SUM_INT to global_sum.F
909     o Added mdsio_gl.F for ECCO purposes.
910    
911    checkpoint33
912     o Fixed bug in lower BC in impldiff.F
913     o Fixed confusion about units of forcing arrays in FFIELDS.h
914       namely Fu,Fv,Qnet,Qsw,EmPmR:
915       - Removed verification/natl_box/code/external_fields_scale.F
916         (did not differ from that in model/src)
917       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
918         (see FFIELDS.h for description)
919       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
920         kpp_calc.F and kpp_transport_t.F
921       - Removed model/src/external_fields_scale.F and calls to it
922       - verification/natl_box uses flux data with "atmospheric" sign so
923         a special version of external_fields_load.F is used to
924         change the data as it's read in. This way, the arrays
925         have the right units and signs at all times tha a user could
926         possibly use them.
927     o Corrected genmake to delete a temporary file during configuration
928    
929    checkpoint32
930     o Scaling of forcing fields moved from external_forcing.F to
931       external_fields_scale.F, called directly after loading fields.
932     o Surface relaxation terms added to surface tendency fields in
933       extra subroutine.
934     o impldiff.F changed to avoid storing by TAMC of huge intermediate
935       fields.
936     o Changes in GMRedi to comply with packaging structure.
937     o Modifications and bug fixes in KPP package.
938     o Verification experiment for KPP added (verification/nat_box/)
939    
940    checkpoint31
941     o Packages interface brought in line with defined standard
942       -> new routines packages_...F
943       -> changes in initialise_fixed.F, initialise_varia.F
944       -> enables initialisation interface for ECCO package
945     o Rescaling of external forcing fields immediately after read
946       (removed from external_forcing.F)
947       -> new: surface_fields_scale.F
948       -> affects ini_foorcing.F, external_fields_load.F
949     o Computation of surface tendencies before tendency updates.
950       -> new: external_forcing_surf.F
951     o Change of variable names useGMRedi, useKPP, useECCO
952     o Further changes in dynamics.F, impldiff.F for TAMC
953     o Tested for experiments 0, 2, 4.
954       - not yet tested for GMRedi.
955       - not yet tested for KPP.
956    
957    checkpoint30
958     o Updates for OBCs
959     o New experiment for test OBCs (internal_wave)
960     o New output.txt in verification/exp4/results/
961     o Updates for KPP: calculation of viscosity corrected, new variables
962       kpp_dumpFreq and kpp_taveFreq
963     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
964       and entry for T90 in genmake
965    
966    checkpoint29
967     o packaged KPP and GM/Redi
968    
969    checkpoint28
970     o Corrected initialization of hFacMin for difference vertical coordinates
971     o Modified calculation of partial cell thickness to more robust algorithm
972     o config_summary.F: replaced write_1D_... by write_0D_...
973       read_write.F: added subroutines write_0D_...
974     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
975       included some initialisations required for TAMC.
976     o routine calc_isoslopes: modified sqrt computation to make it
977       differentiable for zero argument.
978     o routines dynamics, impldiff:
979       included store directives and tape key computations required for TAMC.
980     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
981    
982    checkpoint27
983     o fixed calc_isoslopes() to so that cancellation of terms in tensor
984       formulation works properly with variable resolution.
985     o restructured the calling tree between the_model_main() and dynamics()
986     o split initialise() into initialise_fixed() and initialise_varia()
987     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
988       in new routine ini_psurf()
989    
990    checkpoint26
991     o moved some #ifdef in optional routines to encompass everything
992       except the argument declarations. This was using up some memory.
993     o fixed macros like _ADT to work with both versions of Linux cpp
994     o cleaned up some unused and uninitialized variables
995       (helps when debugging with strict compile options)
996     o split up CPP_EEOPTIONS.h into options and macros
997       (macros are now in eesupp/inc/CPP_EEMACROS.h)
998     o patch for 2 processor JAM mode
999    
1000    checkpoint25
1001     o updates for OBCs and NH
1002     o dramatically reduced memory usage
1003     o added "JAM" routines for use on Artic network
1004     o parameterization of convection by implicit vertical diffusion
1005     o added a diagnostic of convective index
1006     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1007       (this is was partly for OBCs and NH but also in anticipation of
1008        an explicit free-surface option)
1009     o initial state input files for U and V
1010    
1011    checkpoint24
1012     o Removed some spurious "REAL"s
1013     o Updated KPP to latest version from JPL
1014     o Added a COS(latitude) in horizontal viscosity
1015    
1016    checkpoint23
1017     o Added del^4 diffusion for salt and temperature
1018     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1019    
1020    checkpoint22
1021     o Made many small changes: implicit none, format(i5), etc...
1022     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1023    
1024    checkpoint21
1025     o Introduced new I/O package that supports direct-access records (mdsio.F)
1026     o Split-up mid-level I/O routines
1027     o Updated input data for experiments 0,1,2,4 and 5
1028     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1029    
1030    checkpoint20
1031     o Tidied up open-boundaries some more
1032     o Added non-hydrostatic code
1033     o Fixed some input data
1034     o Modified MPI start-up to work in "coupled" context.
1035    
1036    checkpoint19
1037     o Tidied up directory structure for verification experiments.
1038     o Added new code for open boundaries.
1039     o Corrected advective terms near boundaries.
1040     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1041     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1042     o Split default parameters out of ini_parms.F into set_defaults.F.
1043    
1044    checkpoint18
1045     o Further changes for optional code generation with
1046       CPP - ugh!
1047    
1048    checkpoint17
1049     o Beginning to incorporating modularity
1050       for supporting atmos. and ocean configs.
1051     o Small changes for TAMC complinace
1052     o New ultra simple test case. Barotropic box
1053       configuration "exp0".
1054    
1055    checkpoint16
1056     o Minor changes to exchange routines to support
1057       accumulation in reverse mode. Adjoint of an
1058       assignment is an addition.
1059     o Changes to support compilation by TAMC (LR(1)
1060       syntax) and by g77 under Linux ( 72 character
1061       limit ).
1062    
1063    checkpoint15
1064     Rewrote exchange routines to allow
1065     o General tile <-> tile connectivity.
1066     o TAMC reverse mode flag ( is this really needed? )
1067     o Variable width overlap and exchange region widths.
1068     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1069       shmput/shmget, VIA, SYSV shmem and every other cool
1070       communication method.
1071    
1072    checkpoint14
1073     Consistent isomorphism chages made. These allow dynamical core
1074     to support both pressure and meters as a vertical coordinate.
1075    
1076    checkpoint13
1077     Release which corrects global_max problem and a couple
1078     of KGM time-averaging diagnostic errors. Also contains
1079     a double-gyre experiment setup as well as the baseline
1080     4 degree global template. The double gyre template is
1081     organised to allow it to be applied automatically to
1082     the baseline configuration.
1083    
1084    branch-point-rdot
1085     A few tidy-ups have been made bt the real point of this
1086     check-point (excuse the pun) is to allow a branch to be
1087     made for the purposes of adding the rDot alterations.
1088     I don't want to commit the rDot to the main-trunk until
1089     we've actually tested it...
1090    
1091    checkpoint12
1092     Tidy up and added generic genmake script (formerly
1093     configure script).
1094     Released to testers.
1095    
1096  checkpoint11  checkpoint11
1097   Re-arranged initialise() and introduced ini_vertical_grid()   Re-arranged initialise() and introduced ini_vertical_grid()

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