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revision 1.15 by cnh, Wed Oct 28 03:23:17 1998 UTC revision 1.156 by adcroft, Thu May 15 16:15:57 2003 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6     o added missing .cvsignores and made uniform across expts
7     o changed configuration of tidal_basin_2d expt
8     o added pkg/debug functions for tracing code in fatal crashes
9     o tidied pkg/monitor to use MONITOR_OPTIONS.h
10     o new fn in pkg/monitor to stop model if solution grows too big
11     o removed lots of single quotes from comments
12     o fixed gather/scatter inital MPI dialogue in ini_procs.F
13    
14    checkpoint50e_post
15    o make KPP work with PTRACERS
16     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
17       nearly a copy of kpp_transport_s
18     - there is no analogue to SurfaceTendencyS, so I have to use
19       gPtr(of the surface layer) instead
20    o add a new platform SunFire+mpi (SunFire 15000) to genmake
21    checkpoint50e_pre
22    
23    checkpoint50d_post
24    o change kpp output from multiple-record state files to single-record state
25      files analogous to write_state.F
26    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
27      analogous to the cg2d-related output.
28    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
29      so that writing to internal file fn (with length 512) fails.
30    checkpoint50d_pre
31    
32    checkpoint50c_post
33    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
34    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
35    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
36    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
37    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
38    
39    checkpoint50c_pre
40    Merging from release1_p13:
41    o bug fix for pkg/seaice dynamic solver
42    o Added SEAICE_initialHEFF to pkg/seaice
43    
44    checkpoint50b_post
45    o store u*,v* in gU,V instead of in guNm1,gvNm1
46    o in order to put the momForcing out of the Adams-Bashforth:
47      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
48      to timestep.F
49    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
50    o re-generate output for highly sensitive test-exp:
51       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
52    
53    checkpoint50b_pre
54    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
55    o corrected CPP option mismatch in exf_Bulk... functions for case
56      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
57    
58    checkpoint50a_post
59    o Bug fix for merging between c50 and KPP.
60      ikey was passed from thermodynamics to kpp_calc via
61      common block rather than being recomputed in kpp_calc,
62      in contradiction with new key itdkey.
63      New key ikppkey created, and tamc.h headers updated.
64    
65    checkpoint50
66    - 2nd step of merge with ecco-branch:
67      merge changes in ecco-branch back into main trunk
68    - bug fix in find_alpha
69    - more storing in gmredi_calc_tensor.F, kpp_routines.F
70    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
71    - merged some sliced AD support routines
72    
73    checkpoint49
74    merged from ecco-branch:
75    o exf:
76      - Enable initialisation of forcing fields to constant
77        (runtime) values.
78      - in exf_getffields.F
79        Reduce i-/j-loop to interior domain, discarding overlaps.
80        That also fixes wrong TAF-key computations for key_1, key_2
81        with bulf formulae.
82      - exf_init.F modify #ifdef for exf_init_evap
83      - exf_getffieldrec.F, ctrl_getrec.F
84        The following INT-usages are not safe:
85          fldsecs  = int(fldsecs/fldperiod)*fldperiod
86          fldcount = int(fldsecs/fldperiod) + 1
87        and were modified.
88    o autodiff: checkpoint_lev...
89      - updated storing for bulk formulae (some arrays were missing)
90      - added state for seaice package
91      - synchronized with main branch
92    o DIVA:
93      Modif.s in
94      - the_main_loop.F
95      - the_model_main.F
96      and added cost_final_restore.F cost_final_store.F
97      o With these changes, it is possible to fully separate
98        the first forward run to compute the cost function (mdthe_main_loop)
99        and adjoint runs over individual DIVA intervals (adthe_main_loop)
100        into separate model executions.
101        This enables better tuning of DIVA to given queue sizes.
102      o Loss of cost function value in consecutive DIVA runs is
103        fixed by storing to 'costfinal' file.
104      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
105        beginning/end of adjoint integration is accounted for.
106      The current changes apply to TAF-1.4.26.
107      TAF has one remaining bug, requiring one manual change
108      (see MITgcm manual).
109    o cal: synchronized between MAIN and ecco-branch
110    
111    checkpoint48i_post
112    o Changes to restore differentiability of code w.r.t. previous tag
113      (mostly adding new routines to make list and replacing
114      pressure by totPhiHyd).
115    o Updated and merged grdchk package
116      - has both ADM and TLM checks
117      - works for single- and multi-proc.
118      - output cleaned
119      - worked successfully for parallel DIVA
120    o genmake:
121      - Adding -platform=SP4
122      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
123    o Modif. for DIVA:
124      ctrl_unpack should not be called in intermediate DIVA interval.
125      (similar thing would apply for active files such as
126      tbar, sbar, psbar, which should not be reinitialised;
127      only relevant for ecco-branch)
128    
129    checkpoint48h_post
130    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
131    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
132    o Added SEAICE_initialHEFF to pkg/seaice
133    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
134    
135    checkpoint48g_post
136    --- EOS:
137    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
138      store total Potential in totPhyHyd for diagnostics & EOS.
139    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
140    --- Pressure/geopotential gradient:
141    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
142    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
143      ( changes results of global_ocean_pressure )
144    o NLFS + z-coord.: add eta*Rho' contribution.
145    o accurate phiHyd when using interface-W at the middle between 2 centers
146     ( changes results of ideal_2D_oce )
147    o includes r* 2nd term in potential gradient.
148    
149    checkpoint48f_post
150    Merging from release1_p12:
151    o Modifications for using pkg/exf with pkg/seaice
152      - improved description of the various forcing configurations
153      - added basic radiation bulk formulae to pkg/exf
154      - units/sign fix for evap computation in exf_getffields.F
155      - updated verification/global_with_exf/results/output.txt
156    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
157      (SBO) core products, including oceanic mass, center-of-mass,
158      angular, and bottom pressure (see pkg/sbo/README.sbo).
159    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
160      to avoid negative values in shallow regions.
161      - updated verification/natl_box/results/output.txt
162      - updated verification/lab_sea/results/output.txt
163    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
164    o Added useSingleCpuIO option (see PARAMS.h).
165    o Updated useSingleCpuIO option in mdsio_writefield.F to
166      work with multi-field files, e.g., for single-file pickup.
167    o pkg/seaice:
168      - bug fix in growth.F: QNET for no shortwave case
169      - added HeffFile for specifying initial sea-ice thickness
170      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
171    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
172      kpp_transport_t.F, forward_step.F, and the_main_loop.F
173    o pkg/seaice:
174      - adjoint-friendly modifications
175      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
176    
177    checkpoint48e_post
178    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
179    o dynamics: change definition of computational domain & adapt mom_fluxform
180      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
181    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
182        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
183        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
184        global_ocean.90x40x15 global_with_exf global_ocean_pressure
185        inverted_barometer solid-body.cs-32x32x1
186      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
187    
188    checkpoint48d_post
189    o in preparation for r*:
190     a) use pre-computed gradient of hydrostatic potential:
191        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
192     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
193        => affects results of glob_oce_pressure (different truncation error)  
194      update output.txt of ideal_2D_oce & global_ocean_pressure
195    
196    checkpoint48d_pre
197    o in preparation for r*:
198      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
199      pass the 2 comp. of the grad. as arguments to momentum S/R.
200      but for the moment, only used if it does not change the results.
201    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
202    
203    checkpoint48c_post
204    Modifications in treatment of initial flux forcing controls
205    to avoid extra storing of flux fields.
206    
207    checkpoint48c_pre
208    o Added tidal_basin_2d experiment (currently 1D!)
209    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
210    
211    checkpoint48b_post
212    o r* coordinate added in #ifdef NONLIN_FRSURF block.
213     (modification to pressure gradient not yet implemented)
214    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
215      (for U & V) that are used for vertical advection of momentum.
216    
217    checkpoint48a_post
218    o In preparation for r*, use temp. array to compute vertical transport
219       in flux-form momentum pkg. => change results of few test-exp.
220      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
221                        lab_sea, natl_box & plume_on_slope
222    
223    checkpoint48
224    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
225    
226    checkpoint47j_post
227    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
228    o moved adexch from forward_step to addummy_in_stepping
229    o added exch in ctrl_map_...
230    o aveFreq.=0. at end of cost_final to avoid overwrite in
231      reverse checkpointing loop
232    o Yet more changes in gmredi:
233      * adgmredi_calc_tensor
234        avoiding all recomputation of gmredi_slope_limit
235      * adgmredi_x/y/rtransport
236        added flag for excessive storing to avoid recomp. of
237        u/v/rtans, dTdx/y/z
238        -> this is not really necessary and very memory-consuming
239      * adgmredi_slope_psi:
240        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
241      * gmredi_slope_limit
242        re-activated full calculation of taperfct for case 'ac02'
243    o updating verification/ adjoints of carbon, global_ocean.90x40x15
244    
245    checkpoint47i_post
246    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
247    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
248      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
249    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
250    o gmredi: fix few bugs.
251    
252    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
253    This will be a good checkpoint to plug into the ecco-branch.
254    o few modif.'s to get latest version adjointed
255      (mainly kick out code in ini_linear_phisurf)
256    o modif's to run adjoint with exactConserv
257    o case GM_BOLUS_ADVEC should be cleaned
258      S/R gmredi_slope_psi should be cleaned
259    o verification/carbon now has exactConserv=.TRUE.
260    
261    checkpoint47g_post
262    o time-average AIM output: becomes independent from statvars time-average
263      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
264    o After TAF bug fix:
265      Tested adjoint of gmredi package.
266      Tests were done with checkpoint47 rather than with latest
267      checkpoint47f_post since the latter is broken for the adjoint
268      verification/carbon/ contains both ADM and TLM gradient checks.
269    Here they are, before they get changed/lost/stolen.
270    Mostly modif.'s to fix numerical sensitivities.
271    Gradient checks OK for
272    - GM_taper_scheme:
273      * clipping
274      * ac02
275      * linear
276      * glw91
277      * dm95
278      * ldd97
279    - GMREDI_OPTIONS:
280      * GM_VISBECK_VARIABLE_K
281      * GM_NON_UNITY_DIAGONAL
282      * GM_EXTRA_DIAGONAL
283      * GM_BOLUS_ADVEC
284    in conjunction with data.gmredi parameters to be checked in
285    in a few minutes under verification/carbon/code/
286    
287    checkpoint47f_post
288    Merging from release1_p10:
289    o modifications for using pkg/exf with pkg/seaice
290      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
291        and SEAICE_EXTERNAL_FLUXES
292      - pkg/exf CPP options EXF_READ_EVAP and
293        EXF_NO_BULK_COMPUTATIONS
294      - usage examples are Experiments 8 and 9 in
295        verification/lab_sea/README
296      - verification/lab_sea default experiment now uses
297        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
298    
299    checkpoint47e_post
300    o created a tag prior to creating a branch
301    
302    checkpoint47d_post
303    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
304      at the bottom boundary had an erroneous half slip boundary condition
305    o added bottom drag and no slip boundary condition capabilities to
306      oceanic pressure coordinates code
307    o added new verification experiment global_ocean_pressure, this experiment is
308      also described in the tutorial section of the manual
309    checkpoint47d_pre
310    
311    checkpoint47c_post
312    o Added a verification experiment for a global cubed-sphere ocean run
313      -  verification/global_ocean.cubed32x32x30
314      -  uses pkg/therm_seaice and pkg/bulk_forcing
315    
316    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
317    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
318      when using P-coordinate; only implemented for atmospheric config.
319    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
320      NOTES: requires option NONLIN_FRSURF to be "#define".
321    o update advect_xz/results/output.txt (left from checkpoint44g_post)
322    
323    checkpoint47b_post
324    Merging from release1_p9:
325    o pkg/seaice
326      - removed GOTO's and added taf directives
327      - double precision constants to reduce the g77 (Linux)
328        to F77 (SGI) differences reported in release1_p8
329    o tools/genmake
330      - added SGI options
331    o verification/testscript
332      - updated to that of checkpoint47a_post
333    o verification/global_ocean.90x40x15/input/eedata
334      - modified for SGI f77 compatibility
335    o verification/lab_sea
336      - added description of sea-ice model
337      - added missing matlab routines
338      - added test of thermodynamics parallelization
339    
340    checkpoint47a_post
341    o new pkg: aim_v23
342     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
343       for now, keep the same surface forcing as before.
344     - Part-Cell implemented into AIM; check that Heat & Water are conserved
345     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
346     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
347    o add diagnostic of surface correction term in monitor output
348    
349    o bulk_force and therm_seaice
350    - Two packages:  bulk_force (Bulk forcing)
351      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
352    - Earlier integration from Stephaine Dutkiewicz
353      and Patrick Heimbach.
354    - Two ifdef statements for compile time,
355       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
356    
357    checkpoint47
358    differentiable version of checkpoint46n_post
359    o bug fix in quasihydrostaticterms
360    o * "clean" adjoint code (in terms of extensive recomputations)
361        can now be obtained for all GMREDI options (i.e. for
362        - GM_VISBECK_VARIABLE_K
363        - GM_NON_UNITY_DIAGONAL
364        - GM_EXTRA_DIAGONAL
365        - GM_BOLUS_ADVEC )
366      * However, wrong gradient check problem remains unsolved.
367      * New CPP options have been introduced for different
368        tapering schemes
369    o external_fields_load now part of differentiation list
370    o pressure needs multiple storing;
371      would be nice to have store_pressure at beginning or
372      end of forward_step, e.g. by having phiHyd global (5-dim.)
373      (NB: pressure is needed for certain cases in find_rho,
374      which is also invoked through convective_adjustment).
375    o recomputations in find_rho for cases
376     'JMD95'/'UNESCO' or 'MDJWF' are OK.
377    o #define ATMOSPHERIC_LOADING should be differentiable
378    o ini_forcing shifted to begining of initialise_varia
379    o Incorporating QNVS line search routines into MITgcm
380      (this is separate code, and therefore not under pkg)
381      lsopt/, optim/
382    o Updated verification/carbon/
383      - #define GM_VISBECK_VARIABLE_K
384      - GM_taper_scheme    = 'ldd97'    
385    
386    checkpoint46n_post
387    Merging from release1_p8:
388    o verification/natl_box:
389      updating new external_fields_load routine
390    o New package: pkg/seaice
391      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
392      The sea-ice code is based on Hibler (1979-1980).
393      Two sea-ice dynamic solvers, ADI and LSR, are included.
394      In addition to computing prognostic sea-ice variables and diagnosing
395      the forcing/external data fields that drive the ocean model,
396      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
397      The implied surface heat flux is then stored in variable
398      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
399      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
400      non-local transport term.  Because this call precedes model
401      thermodynamics, temperature under sea-ice may not be "exactly" at
402      the freezing point by the time theta is dumped or time-averaged.
403      N.B.: fairly large differences in accuracy occur across
404            different platforms/compilers; comparison between
405            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
406            generated output gives:
407       T           S           U           V
408      C D M    c        m  s        m  s        m  s        m  s
409      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
410      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
411      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
412    
413      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
414    o GAD:
415      - generated new common blocks to account for call of
416        same gad routines with differing traceridentities
417        (needed to modify tracerIdentity indices in GAD.h)
418      - generated separate common blocks for case useCubedSphereExchange
419        (Department of Futurology)
420      - parameter lists to gmredi_?transport: added tracerIdentity
421      - added new key indices to tamc.h
422    o external_fields_load:
423      - added this routine to TAF list
424      - needed to make some common blocks global and additional storing
425        along the same lines as exf package (checkpoint_lev?_directives.h)
426    o exf:
427      updated external forcing package
428      - bug fixes carried over from ecco-branch
429        (missing OBCS_OPTIONS.h in two routines)
430      - enable easy to use "no forcing".
431      - added exf I/O for atmospheric loading
432      - added exf I/O for runoff data
433      - transfered scaling between exf <-> MITgcm to exf namelist
434    o Adding new verification experiment global_with_exf.
435      This verification experiment is almost identical to the
436      global_ocean.90x40x15 experiment, except that it uses
437      the exf (and cal) package instead of the
438      external_fields_load routine (cf README file).
439    
440    checkpoint46m_post
441    o modified testscript to return -- when there are no lines of "%MON" output
442    o added new flag "quasiHydrostatic" for QH mode
443      and new routine quasihydrostaticterms()
444    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
445      New routine: mom_u_coriolis_nh()
446    o fixed sign of non-hydrostatic metric terms in u and v equations.
447      Depend on correct sign of gravitySign.
448    o added work.pc* to .cvsignore in aim directories using ifc
449    o introduced flag for controllin non-hydrostatic metric terms
450    o removed gravitySign from PARM04
451    o switched to g77/ifc from pgf77 in aim experiments
452    
453    checkpoint46l_post
454    o made convective adjustment work with pressure coordinates:
455     - changed the direction of k-loop in convective_adjustment.F for the
456       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
457     - adjusted the reference pressure k-index in convective_adjustment.F
458     - adjusted the convection condition in convect.F (in analogy to
459       calc_ivdc.F)
460     - convective_adjustment no longer computes anything on the halos
461     - removed the warnings about negative salinity from find_rho.F and
462       find_alpha.F; instead the new routine look_for_neg_salinity, called
463       at the beginning of find_rho, find_alpha, and find_beta, does a
464       check of the entire slice, if CPP-option
465       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
466    checkpoint46l_pre
467    
468    checkpoint46k_post
469    o fixed the verification/global_ocean.90x40x15 experiment:
470     - new bathymetry (the world according to A., JMC, and M.)
471     - new initial fields and forcing fields (*.bin files)
472     - new POLY3.COEFFS (for the next release one should switch to a full
473       equation of state: JMD95P or MDJWF)
474     - fixed several errors and redundancies in the data file
475     - experiment uses looped cells
476     - added matlab directory with diagnostic scripts for plotting of output
477    
478    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
479     - read AIM physics parameters from a file (data.aimphys)
480     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
481    
482    checkpoint46j_post
483    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
484    o move wVel computation at the end of the time step, in S/R integr_continuity
485    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
486    o update timeave pkg for wVel diagnostic.
487    checkpoint46j_pre
488    
489    checkpoint46i_post
490    o Clean up AIM package (and keep the results unchanged):
491      include CPP_OPTION and use IMPLICT NONE in all routines ;
492      declare all the variables _RL ; use _d 0 for all numerical constants.
493      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
494    
495    checkpoint46h_post
496    o cleaned up the use of rhoNil and rhoConst.
497      - rhoNil should only appear in the LINEAR equation of state, everywhere
498        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
499        and the dynamical equations are all divided by rhoConst
500    o introduced new parameter rhoConstFresh, a reference density of fresh
501      water, to remove the fresh water flux's dependence on rhoNil. The default
502      value is 999.8 kg/m^3
503    o cleanup up external_forcing.F and external_forcing_surf.F
504      - can now be used by both OCEANIC and OCEANICP
505    checkpoint46h_pre
506    
507     Added code to convert surface volume flux (fresh water) into
508     a mass flux when using P coordinates in the ocean (OCEANICP).
509     Note: It assumes you have set rho0=rhoConst=density of fresh water.
510    
511    checkpoint46g_post
512    o Include a new diagnostic variable phiHydLow for the ocean model
513      - in z-coordinates, it is the bottom pressure anomaly
514      - in p-coordinates, it is the sea surface elevation
515      - in both cases, these variable have global drift, reflecting the mass
516        drift in z-coordinates and the volume drift in p-coordinates
517      - included time averaging for phiHydLow, be aware of the drift!
518    o depth-dependent computation of Bo_surf for pressure coordinates
519      in the ocean (buoyancyRelation='OCEANICP')
520      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
521        Theta, Salinity, and Pressure in the parameter list. This routine is
522        presently contained in find_rho.F. This routine does not give the
523        correct density for 'POLY3', which would be a z-dependent reference
524        density.
525    o cleaned up find_rho
526      - removed obsolete 'eqn' from the parameter list.
527    o added two new verification experiments: gop and goz
528      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
529    checkpoint46g_pre
530    
531    checkpoint46f_post
532    o Enable tangent linear (forward mode) gradient checks:
533      - extended active file handling to g_... files
534      - added TANGENT_SIMULATION to theSimulationMode
535      - extended grdchk package accordingly
536    o added tangent linear setup in verification/carbon/code_ftl
537    o added adjoint setup in verification/front_relax/code_ad
538    
539    checkpoint46e_post
540    o Added new equation of state -> MDJWF
541      - EOS of McDougall et al., 2002, JAOT, submitted
542      - caveat: the equation of state is only valid for a smaller (more
543        realistic?) range of values than JMD95P/Z and UNESCO
544      - added masks to the calculation of pressure in store_pressure
545      - added more check values for density in check_eos (ini_eos.F), some of
546        the old check values are out of the range of the MDJWF-eos, so don't
547        expect perfect matches for those
548    checkpoint46e_pre
549    
550    checkpoint46d_post
551    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
552      'OCEANICP', also initialised field pressure correctly in ini_eos in the
553      case of pressure coordinates. eosType='JMD95Z' in
554      combination with buoyancyRelation='OCEANICP' now causes an error.
555    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
556      in find_alpha/beta.
557    checkpoint46d_pre
558    
559    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
560      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
561    
562    checkpoint46c_post
563    o Changes necessary for ocean in p-coordinates
564     -  Added new buoyancy relation = 'OCEANICP'
565     -  Added new parameters = gravitySign (this used to be contained inside
566        the factor dRdZ which I added when we first switched to R coordinates).
567     X GM/Redi is not compatible (yet)
568     X bottom drag and no-slip need to be debugged.
569    checkpoint46c_pre
570    
571    checkpoint46b_post
572    o Added new equation of state -> JMD95Z and JMD95P
573      - EOS of Jackett and McDougall, 1995, JAOT
574      - moved all EOS parameters into EOS.h
575      - new routines ini_eos.F, store_pressure.F
576    o Added UNESCO EOS, but not recommended because it requires
577      in-situ temperature (see JMD95)
578    o Modified formatting for knudsen2.f in utils/knudsen2 and added
579      unesco.f to be used with POLY3
580    checkpoint46b_pre
581    
582    checkpoint46a_post
583    o Added (atmospheric) pressure loading
584      - new field in FFIELDS.h, etc...
585      - new cpp flag ATMOSPHERIC_LOADING
586    o Changed hFacC to _hFacC in calc_phi_hyd.F
587    o Added SHORTWAVE_HEATING to some files for consistency
588    checkpoint46a_pre
589    
590    checkpoint46
591    further merges from release1_p5
592    o new ctrl package
593      - adopted from ECCO environment to enable optimization
594      - added Eliassen Palm fluxes to controls
595    o added Eliassen Palm flux controls to gradient check package
596    o cost package
597      - Compatible with new ctrl package
598      - added Eliassen Palm cost hooks
599      - modif's of existing cost functions
600    o Adjoint-related bug fixes in kpp:
601      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
602      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
603    o autodiff package
604      - flow directives:
605        + new for S/R do_the_model_io
606        + enhanced for S/R checkpoint
607        + new gmredi.flow
608      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
609        disable adcommon.h/g_common.h by default.
610      - fixed problem for adjoint of global_max
611    o modified verification/carbon/
612    o New setup for adjoint of global_ocean
613    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
614    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
615    o incorporated hooks for sponge layer code (external_forcing.F)
616    
617    checkpoint45d_post
618    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
619    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
620      (affects plume_on_slope "cg2d" output)
621    o add new parameter deltaTfreesurf for free-surface time stepping
622    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
623    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
624    o change phiMin in exp1 (to agree with documentation)
625    o add new flags:
626     - T,S forcing inside/outside Adams-Bashforth
627     - turn off temp,salt advection and/or forcing
628     - for each tracer, define internal flag for multiDimAdvection & A-B
629    o monitor: change definition of KE to check conservation of Energy
630    
631    checkpoint45c_post
632    o Removed f90 comments ("!")
633    o Modified initialisations to enable exf package for MITgcm
634      (without invoking ECCO_PACKAGE).
635    o modifications to gradient check package (Martin Losch)
636      - enable centered differences
637      - modified format of standard output
638    
639    checkpoint45b_post
640    o cleaned exchange calls in cg2d
641    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
642    o included CPP option SINGLE_LAYER_MODE in thermodynamics
643      to configure barotropic setup (Martin Losch)
644    o moved some initialisations within bi,bj loop in dynamics
645      (TAF flow dependency)
646    o in initialise_varia, moved call packages_init_variables
647      before convective_adjustment_init
648      (corresponding adjustment of TAF tape initialisation).
649    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
650    
651    checkpoint45a_post
652    o compute Rho over the whole domain (extend iMin,jMin indices)
653    o specific exchange for X-slice domain (case Ny=1)
654    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
655    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
656    
657    checkpoint44h_post = checkpoint45
658    o Fix to restore differentiability:
659      place at which packages_init_variables is called in
660      initialise_varia is crucial for reverse control flow.
661    o modifications in GMRedi to enable stable adjoint
662      (corresponding modif's in thermodynamics, dynamics)
663    o added missing hook for sponge layer code in external_forcing
664    o modified test cost functions
665    o storing in gad_advection (plus removal of write(0,*)!
666    o missing headers TR1.h added in convective_adjustment routines
667    o errorMessageUnit set non-equal zero in eeboot
668      (conflict on some platforms, e.g. IBM SP3)
669    o modified carbon verif.
670    
671    checkpoint44h_pre
672    o vertical grid option: allow to put the Interface at the middle between
673      2 cell-centers ; replace delZ in pkg/kpp by drF.
674    o GM Advective form: Tracers are advected using the residual transport (=
675      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
676    
677    checkpoint44g_post
678    o fix surface correction term in multiDimAdvection (affects plume_on_slope
679      results) ; ifdef missing in thermodynamics.F
680    
681    checkpoint44f_pre,checkpoint44f_post
682    o added PTRACERS package
683      This allows an arbitrary number of passive tracers to be integrated
684      forward simultaneously with the dynamicaly model.
685      + Implemented so far:
686        - basic forward algorithm (time-stepping, advection, diffusion, convection)
687        - I/O and checkpointing
688        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
689      + Not implemented so far:
690        - KPP
691        - OBCS
692      + No specific example supplied (yet) but global_ocean.90x40x15 has the
693        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
694        line in data.pkg.
695      + This package is disabled by default since it increases storage.
696    
697    
698    o testscript: added -cleanup option
699    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
700                 b) enable to filter 2D fields.
701    
702    checkpoint44e_pre,post
703    o re-wrote convective adjustment to use pre-calculated weights
704      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
705      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
706      Original calls to convect() still in place.
707    
708    chkpt44d_pre,post
709    o added missing EXCLUDE_MONITOR flags
710    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
711      (incompatible typ in MIN/MAX expressions caused problems
712      on IBM SP3)
713    o in genmake added variable MAKEDEPEND
714      plus resetting for case SunOS
715    o added timer_stats.c routine for IBM SP3
716    o removed variables in dynamics
717    !!! I forgot to create tag chkpt44d_pre !!!
718    !!! But chkpt44d_pre = chkpt44c_post    !!!
719    
720    o real fresh water flux implemented with non-linear free-surface.
721    
722    chkpt44c_pre,post
723    o few fix (mask in shap_s2, EmPmR in external_field_load,
724      USE_NATURAL_BCS in solve_for_P);
725    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
726    
727    checkpoint44b_pre/_post
728    o merge of relevant stuff from the ecco-branch:
729      - genmake: removed $S64 overwrite for case SunOS
730      - pkg/exf: update and corrections for field swapping and obcs
731      - pkg/ecco: parameter lists for the_model_main, the_main_loop
732                  harmonized between ECCO and MITgcm
733      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
734                      updated checkpointing_lev... lists for obcs
735      - model/src: minor changes in forward_step, plot_field
736                   added directive for divided adjoint in the_main_loop
737      - pkg/mdsio: added mdsio_gl_slice
738    
739    o check parameters & config (chkpt44a_pre,post)
740    o OBC and NonLin_FrSurf.
741    
742    checkpoint44
743    o fix bug in mom_vi_del2uv
744    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
745    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
746    o update AIM experiments (NCEP input files)
747    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
748    o added some stuff for AD
749    
750    checkpoint43
751    o added two new advection tests
752    o added global 4x4 degree ocean test
753    o added test of H&S94 with free surface on cube
754    o some final mods for gradient check, adjoint,...
755    
756    checkpoint42
757      Fixed AD-related problems:
758    o Store directives up-to-date with re-arranged Adams-Bashforth
759      (mainly thermodynamics.F)
760    o New store directives for multi-dim. advection schemes
761      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
762      * new common block and key passkey
763      (mainly gad_advection.F)
764    o Modified store directives for split of dynamics/thermodynamics
765      for the case ALLOW_KPP
766    o Cleaned argument list for timestep_tracer.F
767    
768    checkpoint41
769    o re-formatted/added comments in prologues of key subroutines
770      to work with protex
771    
772    checkpoint40
773    o moved calc_gs, calc_gt and calc_tr1 back to model/src
774    o added FLT (floats) package from Arne along with demo. experiment
775    o re-arranged Adams-Bashforth scheme for tracers to allow easier
776      implementation of forward-in-time forcing terms
777    o more mods for non-linear free-surface including new variable
778    o modified multi-dim method to work on cube
779    o bug fix in KPP (from DM)
780    
781    checkpoint40pre9
782    o added DST advection schemes
783    o fix MPI bug on SGI's
784    o modifications for non-linear free-surface
785    o fixed conditionals for fixed flow/passive tracer only mode
786    o added tension/strain form of stress tensor
787    o changes to commenting of arguments for TAF/TAMC
788    o added/updated many matlab scripts
789    o added multi-dimensional advection method for tracers
790      
791    checkpoint40pre8
792    o new package rw/
793      Added method for dumping intermediate local arrays:
794      mdsio_writetile - same as mdsio_writefield except works from inside
795                        bi,bj loop
796      mdsio_writelocal - same as mdsio_writetile except works for local
797                         arrays
798      write_local_r? - higher-level wrapper for mdsio_writelocal
799      Controlled by diagFreq. Defaults to zero (ie. no dumps)
800      Example given at end of mom_vecinv.F that dumps some local arrays.
801    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
802      control flux-form versus vector invariant code.
803      Switch is runtime flag vectorInvariantMomentum (defaults to false)
804      or genmake -DISABLE ...
805    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
806      (additional storing is now needed for case vecinv;
807      currently nothing implemented to switch this storing off
808      in case fluxform is used since no CPP flag available).
809    
810    checkpoint40pre7
811    o bug fix in dynamics.F
812      calc_viscosity called before k=1,Nr loop.
813    o added some #ifdef's ALLOW_PASSIVE_TRACER
814    o cleaned initialisations in ctrl_map_ini
815      related to TAF
816    
817    checkpoint40pre6
818    o split dynamics into thermodynamics & dynamics
819    o corresponding split of calc_diffusivity into
820      calc_diffusivity, calc_viscosity
821      (kpp_calc_diff, kpp_calc_visc).
822    o Added diffkr, kapgm to control variables
823    o bug fix in gmredi_slope_limit for ldd97
824    
825    checkpoint40pre5
826    o proper initialization of Adams-Bashforth time stepping
827      + uses forward step for very first step of model (iter=0)
828    o re-generated *all* output since almost all output is modified by this
829      change (sorry but we've been putting this one off for about 2 years)
830      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
831        *not* regenerated since they are already out of date and I don't
832        want to create the impression that they are suddenly working.
833    o removed KAP stuff for DEC's
834    o modified/added many .cvsignore files in */code and */input
835    o added new expt "solid-body.cs-32x32x1"
836      + this uses an alternative form of ini_curvilinear_grid.F which
837        is not necessarily any better than the current one...
838    
839    checkpoint40pre4
840    o added re-initialisations of utrans,vtrans,rtrans in
841      calc_common_factors which are crucial for TAF.
842    o extended iMin,jMin range for calc_common_factors,
843      calc_diffusivity
844    o added option ALLOW_PASSIVE_TRACER
845    o a few minor updates and fixes
846    
847    checkpoint40pre3
848    o created calc_gtr1.F for gad package
849    o split the_main_loop and re-introduced forward_step
850    o some recomputations of nIter0 for TAMC
851    
852    checkpoint40pre2
853    o Updated to latest branch of AJA, JMC
854    o Added gradient check package
855    o Added routines for passive tracer handling
856    o Added carbon sequestration sensitivity experiment
857    
858    checkpoint39
859     o Modifications and fixes to support TAMC
860       (mainly missing or wrong directives)
861     o Corrected common blocks when fooling TAMC to produce adjoint I/O
862       in addummy_in_stepping
863     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
864     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
865     o Included following packages:
866       cal: calendar
867       exf: external forcing
868       ecco: essential routines to control use of cal, exf
869             (NB: this is not the full ECCO environment)
870     o disabled some packages by default in genmake
871    
872    checkpoint38
873     o see notes_c37_adj.txt
874     o corrected wrong layer index in external_forcing_t
875     o replaced the_main_loop/forward_step by the_main_loop
876     o removed forceoutput from write_state
877       (replaced criteria for initial/final state)
878     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
879    
880    checkpoint37
881     o mdsio.F routine split and packaged in pkg/mdsio
882       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
883        used unless genmake -disable=mdsio)
884     o allow a more precise surface-geopotential gradient for the atmosphere
885       taking into account the change in space of Alpha (=1/rho) at the surface.
886     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
887       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
888     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
889       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
890       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
891     o Time-Average diagnostics defined as a pseudo package "timeave".
892     o pickup files : old pickup (before c35) did not work with new code (c35
893       and after) unless activating 2 commented lines in initialise-varia.
894     o Non-Hydrostatic pickup file Pb fixed.
895     o bug with Rigid-lid version (since c35) fixed.  
896    
897    checkpoint36
898     o implement Crank-Nickelson barotropic time-stepping
899     o recover Time-Average diagnostics
900     o fix Pb in checkpoint (PR#19)
901     o AIM become a standard package ; clean unused CPP_kees
902    
903    checkpoint35
904     o subtantial rewrite of dynamics.f
905     o allows staggered time-stepping
906     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
907     o added bottom drag (linear + quadratic)
908    
909    checkpoint34
910     o Modified exchange routines for correct reverse simulation.
911     o Added verification output to comply with bug fix in impldiff.F
912       as of c33 (exp2, natl_box).
913     o Corrected store directives in dynamics.F
914     o Corrected array boundaries in impldiff.F
915     o Corrected array dimensions in gmredi.
916       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
917     o Added routine GLOBAL_SUM_INT to global_sum.F
918     o Added mdsio_gl.F for ECCO purposes.
919    
920    checkpoint33
921     o Fixed bug in lower BC in impldiff.F
922     o Fixed confusion about units of forcing arrays in FFIELDS.h
923       namely Fu,Fv,Qnet,Qsw,EmPmR:
924       - Removed verification/natl_box/code/external_fields_scale.F
925         (did not differ from that in model/src)
926       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
927         (see FFIELDS.h for description)
928       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
929         kpp_calc.F and kpp_transport_t.F
930       - Removed model/src/external_fields_scale.F and calls to it
931       - verification/natl_box uses flux data with "atmospheric" sign so
932         a special version of external_fields_load.F is used to
933         change the data as it's read in. This way, the arrays
934         have the right units and signs at all times tha a user could
935         possibly use them.
936     o Corrected genmake to delete a temporary file during configuration
937    
938    checkpoint32
939     o Scaling of forcing fields moved from external_forcing.F to
940       external_fields_scale.F, called directly after loading fields.
941     o Surface relaxation terms added to surface tendency fields in
942       extra subroutine.
943     o impldiff.F changed to avoid storing by TAMC of huge intermediate
944       fields.
945     o Changes in GMRedi to comply with packaging structure.
946     o Modifications and bug fixes in KPP package.
947     o Verification experiment for KPP added (verification/nat_box/)
948    
949    checkpoint31
950     o Packages interface brought in line with defined standard
951       -> new routines packages_...F
952       -> changes in initialise_fixed.F, initialise_varia.F
953       -> enables initialisation interface for ECCO package
954     o Rescaling of external forcing fields immediately after read
955       (removed from external_forcing.F)
956       -> new: surface_fields_scale.F
957       -> affects ini_foorcing.F, external_fields_load.F
958     o Computation of surface tendencies before tendency updates.
959       -> new: external_forcing_surf.F
960     o Change of variable names useGMRedi, useKPP, useECCO
961     o Further changes in dynamics.F, impldiff.F for TAMC
962     o Tested for experiments 0, 2, 4.
963       - not yet tested for GMRedi.
964       - not yet tested for KPP.
965    
966    checkpoint30
967     o Updates for OBCs
968     o New experiment for test OBCs (internal_wave)
969     o New output.txt in verification/exp4/results/
970     o Updates for KPP: calculation of viscosity corrected, new variables
971       kpp_dumpFreq and kpp_taveFreq
972     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
973       and entry for T90 in genmake
974    
975    checkpoint29
976     o packaged KPP and GM/Redi
977    
978    checkpoint28
979     o Corrected initialization of hFacMin for difference vertical coordinates
980     o Modified calculation of partial cell thickness to more robust algorithm
981     o config_summary.F: replaced write_1D_... by write_0D_...
982       read_write.F: added subroutines write_0D_...
983     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
984       included some initialisations required for TAMC.
985     o routine calc_isoslopes: modified sqrt computation to make it
986       differentiable for zero argument.
987     o routines dynamics, impldiff:
988       included store directives and tape key computations required for TAMC.
989     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
990    
991    checkpoint27
992     o fixed calc_isoslopes() to so that cancellation of terms in tensor
993       formulation works properly with variable resolution.
994     o restructured the calling tree between the_model_main() and dynamics()
995     o split initialise() into initialise_fixed() and initialise_varia()
996     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
997       in new routine ini_psurf()
998    
999    checkpoint26
1000     o moved some #ifdef in optional routines to encompass everything
1001       except the argument declarations. This was using up some memory.
1002     o fixed macros like _ADT to work with both versions of Linux cpp
1003     o cleaned up some unused and uninitialized variables
1004       (helps when debugging with strict compile options)
1005     o split up CPP_EEOPTIONS.h into options and macros
1006       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1007     o patch for 2 processor JAM mode
1008    
1009    checkpoint25
1010     o updates for OBCs and NH
1011     o dramatically reduced memory usage
1012     o added "JAM" routines for use on Artic network
1013     o parameterization of convection by implicit vertical diffusion
1014     o added a diagnostic of convective index
1015     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1016       (this is was partly for OBCs and NH but also in anticipation of
1017        an explicit free-surface option)
1018     o initial state input files for U and V
1019    
1020    checkpoint24
1021     o Removed some spurious "REAL"s
1022     o Updated KPP to latest version from JPL
1023     o Added a COS(latitude) in horizontal viscosity
1024    
1025    checkpoint23
1026     o Added del^4 diffusion for salt and temperature
1027     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1028    
1029    checkpoint22
1030     o Made many small changes: implicit none, format(i5), etc...
1031     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1032    
1033    checkpoint21
1034     o Introduced new I/O package that supports direct-access records (mdsio.F)
1035     o Split-up mid-level I/O routines
1036     o Updated input data for experiments 0,1,2,4 and 5
1037     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1038    
1039    checkpoint20
1040     o Tidied up open-boundaries some more
1041     o Added non-hydrostatic code
1042     o Fixed some input data
1043     o Modified MPI start-up to work in "coupled" context.
1044    
1045    checkpoint19
1046     o Tidied up directory structure for verification experiments.
1047     o Added new code for open boundaries.
1048     o Corrected advective terms near boundaries.
1049     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1050     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1051     o Split default parameters out of ini_parms.F into set_defaults.F.
1052    
1053    checkpoint18
1054     o Further changes for optional code generation with
1055       CPP - ugh!
1056    
1057    checkpoint17
1058     o Beginning to incorporating modularity
1059       for supporting atmos. and ocean configs.
1060     o Small changes for TAMC complinace
1061     o New ultra simple test case. Barotropic box
1062       configuration "exp0".
1063    
1064  checkpoint16  checkpoint16
1065   o Minor changes to exchange routines to support   o Minor changes to exchange routines to support
1066     accumulation in reverse mode. Adjoint of an     accumulation in reverse mode. Adjoint of an

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