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revision 1.13 by cnh, Wed Sep 9 15:24:19 1998 UTC revision 1.152 by jmc, Fri May 2 22:42:39 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 add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
7    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
8    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
9    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
10    
11    checkpoint50c_pre
12    Merging from release1_p13:
13    o bug fix for pkg/seaice dynamic solver
14    o Added SEAICE_initialHEFF to pkg/seaice
15    
16    checkpoint50b_post
17    o store u*,v* in gU,V instead of in guNm1,gvNm1
18    o in order to put the momForcing out of the Adams-Bashforth:
19      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
20      to timestep.F
21    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
22    o re-generate output for highly sensitive test-exp:
23       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
24    
25    checkpoint50b_pre
26    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
27    o corrected CPP option mismatch in exf_Bulk... functions for case
28      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
29    
30    checkpoint50a_post
31    o Bug fix for merging between c50 and KPP.
32      ikey was passed from thermodynamics to kpp_calc via
33      common block rather than being recomputed in kpp_calc,
34      in contradiction with new key itdkey.
35      New key ikppkey created, and tamc.h headers updated.
36    
37    checkpoint50
38    - 2nd step of merge with ecco-branch:
39      merge changes in ecco-branch back into main trunk
40    - bug fix in find_alpha
41    - more storing in gmredi_calc_tensor.F, kpp_routines.F
42    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
43    - merged some sliced AD support routines
44    
45    checkpoint49
46    merged from ecco-branch:
47    o exf:
48      - Enable initialisation of forcing fields to constant
49        (runtime) values.
50      - in exf_getffields.F
51        Reduce i-/j-loop to interior domain, discarding overlaps.
52        That also fixes wrong TAF-key computations for key_1, key_2
53        with bulf formulae.
54      - exf_init.F modify #ifdef for exf_init_evap
55      - exf_getffieldrec.F, ctrl_getrec.F
56        The following INT-usages are not safe:
57          fldsecs  = int(fldsecs/fldperiod)*fldperiod
58          fldcount = int(fldsecs/fldperiod) + 1
59        and were modified.
60    o autodiff: checkpoint_lev...
61      - updated storing for bulk formulae (some arrays were missing)
62      - added state for seaice package
63      - synchronized with main branch
64    o DIVA:
65      Modif.s in
66      - the_main_loop.F
67      - the_model_main.F
68      and added cost_final_restore.F cost_final_store.F
69      o With these changes, it is possible to fully separate
70        the first forward run to compute the cost function (mdthe_main_loop)
71        and adjoint runs over individual DIVA intervals (adthe_main_loop)
72        into separate model executions.
73        This enables better tuning of DIVA to given queue sizes.
74      o Loss of cost function value in consecutive DIVA runs is
75        fixed by storing to 'costfinal' file.
76      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
77        beginning/end of adjoint integration is accounted for.
78      The current changes apply to TAF-1.4.26.
79      TAF has one remaining bug, requiring one manual change
80      (see MITgcm manual).
81    o cal: synchronized between MAIN and ecco-branch
82    
83    checkpoint48i_post
84    o Changes to restore differentiability of code w.r.t. previous tag
85      (mostly adding new routines to make list and replacing
86      pressure by totPhiHyd).
87    o Updated and merged grdchk package
88      - has both ADM and TLM checks
89      - works for single- and multi-proc.
90      - output cleaned
91      - worked successfully for parallel DIVA
92    o genmake:
93      - Adding -platform=SP4
94      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
95    o Modif. for DIVA:
96      ctrl_unpack should not be called in intermediate DIVA interval.
97      (similar thing would apply for active files such as
98      tbar, sbar, psbar, which should not be reinitialised;
99      only relevant for ecco-branch)
100    
101    checkpoint48h_post
102    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
103    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
104    o Added SEAICE_initialHEFF to pkg/seaice
105    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
106    
107    checkpoint48g_post
108    --- EOS:
109    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
110      store total Potential in totPhyHyd for diagnostics & EOS.
111    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
112    --- Pressure/geopotential gradient:
113    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
114    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
115      ( changes results of global_ocean_pressure )
116    o NLFS + z-coord.: add eta*Rho' contribution.
117    o accurate phiHyd when using interface-W at the middle between 2 centers
118     ( changes results of ideal_2D_oce )
119    o includes r* 2nd term in potential gradient.
120    
121    checkpoint48f_post
122    Merging from release1_p12:
123    o Modifications for using pkg/exf with pkg/seaice
124      - improved description of the various forcing configurations
125      - added basic radiation bulk formulae to pkg/exf
126      - units/sign fix for evap computation in exf_getffields.F
127      - updated verification/global_with_exf/results/output.txt
128    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
129      (SBO) core products, including oceanic mass, center-of-mass,
130      angular, and bottom pressure (see pkg/sbo/README.sbo).
131    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
132      to avoid negative values in shallow regions.
133      - updated verification/natl_box/results/output.txt
134      - updated verification/lab_sea/results/output.txt
135    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
136    o Added useSingleCpuIO option (see PARAMS.h).
137    o Updated useSingleCpuIO option in mdsio_writefield.F to
138      work with multi-field files, e.g., for single-file pickup.
139    o pkg/seaice:
140      - bug fix in growth.F: QNET for no shortwave case
141      - added HeffFile for specifying initial sea-ice thickness
142      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
143    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
144      kpp_transport_t.F, forward_step.F, and the_main_loop.F
145    o pkg/seaice:
146      - adjoint-friendly modifications
147      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
148    
149    checkpoint48e_post
150    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
151    o dynamics: change definition of computational domain & adapt mom_fluxform
152      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
153    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
154        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
155        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
156        global_ocean.90x40x15 global_with_exf global_ocean_pressure
157        inverted_barometer solid-body.cs-32x32x1
158      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
159    
160    checkpoint48d_post
161    o in preparation for r*:
162     a) use pre-computed gradient of hydrostatic potential:
163        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
164     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
165        => affects results of glob_oce_pressure (different truncation error)  
166      update output.txt of ideal_2D_oce & global_ocean_pressure
167    
168    checkpoint48d_pre
169    o in preparation for r*:
170      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
171      pass the 2 comp. of the grad. as arguments to momentum S/R.
172      but for the moment, only used if it does not change the results.
173    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
174    
175    checkpoint48c_post
176    Modifications in treatment of initial flux forcing controls
177    to avoid extra storing of flux fields.
178    
179    checkpoint48c_pre
180    o Added tidal_basin_2d experiment (currently 1D!)
181    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
182    
183    checkpoint48b_post
184    o r* coordinate added in #ifdef NONLIN_FRSURF block.
185     (modification to pressure gradient not yet implemented)
186    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
187      (for U & V) that are used for vertical advection of momentum.
188    
189    checkpoint48a_post
190    o In preparation for r*, use temp. array to compute vertical transport
191       in flux-form momentum pkg. => change results of few test-exp.
192      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
193                        lab_sea, natl_box & plume_on_slope
194    
195    checkpoint48
196    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
197    
198    checkpoint47j_post
199    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
200    o moved adexch from forward_step to addummy_in_stepping
201    o added exch in ctrl_map_...
202    o aveFreq.=0. at end of cost_final to avoid overwrite in
203      reverse checkpointing loop
204    o Yet more changes in gmredi:
205      * adgmredi_calc_tensor
206        avoiding all recomputation of gmredi_slope_limit
207      * adgmredi_x/y/rtransport
208        added flag for excessive storing to avoid recomp. of
209        u/v/rtans, dTdx/y/z
210        -> this is not really necessary and very memory-consuming
211      * adgmredi_slope_psi:
212        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
213      * gmredi_slope_limit
214        re-activated full calculation of taperfct for case 'ac02'
215    o updating verification/ adjoints of carbon, global_ocean.90x40x15
216    
217    checkpoint47i_post
218    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
219    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
220      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
221    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
222    o gmredi: fix few bugs.
223    
224    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
225    This will be a good checkpoint to plug into the ecco-branch.
226    o few modif.'s to get latest version adjointed
227      (mainly kick out code in ini_linear_phisurf)
228    o modif's to run adjoint with exactConserv
229    o case GM_BOLUS_ADVEC should be cleaned
230      S/R gmredi_slope_psi should be cleaned
231    o verification/carbon now has exactConserv=.TRUE.
232    
233    checkpoint47g_post
234    o time-average AIM output: becomes independent from statvars time-average
235      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
236    o After TAF bug fix:
237      Tested adjoint of gmredi package.
238      Tests were done with checkpoint47 rather than with latest
239      checkpoint47f_post since the latter is broken for the adjoint
240      verification/carbon/ contains both ADM and TLM gradient checks.
241    Here they are, before they get changed/lost/stolen.
242    Mostly modif.'s to fix numerical sensitivities.
243    Gradient checks OK for
244    - GM_taper_scheme:
245      * clipping
246      * ac02
247      * linear
248      * glw91
249      * dm95
250      * ldd97
251    - GMREDI_OPTIONS:
252      * GM_VISBECK_VARIABLE_K
253      * GM_NON_UNITY_DIAGONAL
254      * GM_EXTRA_DIAGONAL
255      * GM_BOLUS_ADVEC
256    in conjunction with data.gmredi parameters to be checked in
257    in a few minutes under verification/carbon/code/
258    
259    checkpoint47f_post
260    Merging from release1_p10:
261    o modifications for using pkg/exf with pkg/seaice
262      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
263        and SEAICE_EXTERNAL_FLUXES
264      - pkg/exf CPP options EXF_READ_EVAP and
265        EXF_NO_BULK_COMPUTATIONS
266      - usage examples are Experiments 8 and 9 in
267        verification/lab_sea/README
268      - verification/lab_sea default experiment now uses
269        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
270    
271    checkpoint47e_post
272    o created a tag prior to creating a branch
273    
274    checkpoint47d_post
275    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
276      at the bottom boundary had an erroneous half slip boundary condition
277    o added bottom drag and no slip boundary condition capabilities to
278      oceanic pressure coordinates code
279    o added new verification experiment global_ocean_pressure, this experiment is
280      also described in the tutorial section of the manual
281    checkpoint47d_pre
282    
283    checkpoint47c_post
284    o Added a verification experiment for a global cubed-sphere ocean run
285      -  verification/global_ocean.cubed32x32x30
286      -  uses pkg/therm_seaice and pkg/bulk_forcing
287    
288    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
289    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
290      when using P-coordinate; only implemented for atmospheric config.
291    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
292      NOTES: requires option NONLIN_FRSURF to be "#define".
293    o update advect_xz/results/output.txt (left from checkpoint44g_post)
294    
295    checkpoint47b_post
296    Merging from release1_p9:
297    o pkg/seaice
298      - removed GOTO's and added taf directives
299      - double precision constants to reduce the g77 (Linux)
300        to F77 (SGI) differences reported in release1_p8
301    o tools/genmake
302      - added SGI options
303    o verification/testscript
304      - updated to that of checkpoint47a_post
305    o verification/global_ocean.90x40x15/input/eedata
306      - modified for SGI f77 compatibility
307    o verification/lab_sea
308      - added description of sea-ice model
309      - added missing matlab routines
310      - added test of thermodynamics parallelization
311    
312    checkpoint47a_post
313    o new pkg: aim_v23
314     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
315       for now, keep the same surface forcing as before.
316     - Part-Cell implemented into AIM; check that Heat & Water are conserved
317     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
318     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
319    o add diagnostic of surface correction term in monitor output
320    
321    o bulk_force and therm_seaice
322    - Two packages:  bulk_force (Bulk forcing)
323      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
324    - Earlier integration from Stephaine Dutkiewicz
325      and Patrick Heimbach.
326    - Two ifdef statements for compile time,
327       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
328    
329    checkpoint47
330    differentiable version of checkpoint46n_post
331    o bug fix in quasihydrostaticterms
332    o * "clean" adjoint code (in terms of extensive recomputations)
333        can now be obtained for all GMREDI options (i.e. for
334        - GM_VISBECK_VARIABLE_K
335        - GM_NON_UNITY_DIAGONAL
336        - GM_EXTRA_DIAGONAL
337        - GM_BOLUS_ADVEC )
338      * However, wrong gradient check problem remains unsolved.
339      * New CPP options have been introduced for different
340        tapering schemes
341    o external_fields_load now part of differentiation list
342    o pressure needs multiple storing;
343      would be nice to have store_pressure at beginning or
344      end of forward_step, e.g. by having phiHyd global (5-dim.)
345      (NB: pressure is needed for certain cases in find_rho,
346      which is also invoked through convective_adjustment).
347    o recomputations in find_rho for cases
348     'JMD95'/'UNESCO' or 'MDJWF' are OK.
349    o #define ATMOSPHERIC_LOADING should be differentiable
350    o ini_forcing shifted to begining of initialise_varia
351    o Incorporating QNVS line search routines into MITgcm
352      (this is separate code, and therefore not under pkg)
353      lsopt/, optim/
354    o Updated verification/carbon/
355      - #define GM_VISBECK_VARIABLE_K
356      - GM_taper_scheme    = 'ldd97'    
357    
358    checkpoint46n_post
359    Merging from release1_p8:
360    o verification/natl_box:
361      updating new external_fields_load routine
362    o New package: pkg/seaice
363      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
364      The sea-ice code is based on Hibler (1979-1980).
365      Two sea-ice dynamic solvers, ADI and LSR, are included.
366      In addition to computing prognostic sea-ice variables and diagnosing
367      the forcing/external data fields that drive the ocean model,
368      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
369      The implied surface heat flux is then stored in variable
370      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
371      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
372      non-local transport term.  Because this call precedes model
373      thermodynamics, temperature under sea-ice may not be "exactly" at
374      the freezing point by the time theta is dumped or time-averaged.
375      N.B.: fairly large differences in accuracy occur across
376            different platforms/compilers; comparison between
377            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
378            generated output gives:
379       T           S           U           V
380      C D M    c        m  s        m  s        m  s        m  s
381      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
382      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
383      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
384    
385      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
386    o GAD:
387      - generated new common blocks to account for call of
388        same gad routines with differing traceridentities
389        (needed to modify tracerIdentity indices in GAD.h)
390      - generated separate common blocks for case useCubedSphereExchange
391        (Department of Futurology)
392      - parameter lists to gmredi_?transport: added tracerIdentity
393      - added new key indices to tamc.h
394    o external_fields_load:
395      - added this routine to TAF list
396      - needed to make some common blocks global and additional storing
397        along the same lines as exf package (checkpoint_lev?_directives.h)
398    o exf:
399      updated external forcing package
400      - bug fixes carried over from ecco-branch
401        (missing OBCS_OPTIONS.h in two routines)
402      - enable easy to use "no forcing".
403      - added exf I/O for atmospheric loading
404      - added exf I/O for runoff data
405      - transfered scaling between exf <-> MITgcm to exf namelist
406    o Adding new verification experiment global_with_exf.
407      This verification experiment is almost identical to the
408      global_ocean.90x40x15 experiment, except that it uses
409      the exf (and cal) package instead of the
410      external_fields_load routine (cf README file).
411    
412    checkpoint46m_post
413    o modified testscript to return -- when there are no lines of "%MON" output
414    o added new flag "quasiHydrostatic" for QH mode
415      and new routine quasihydrostaticterms()
416    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
417      New routine: mom_u_coriolis_nh()
418    o fixed sign of non-hydrostatic metric terms in u and v equations.
419      Depend on correct sign of gravitySign.
420    o added work.pc* to .cvsignore in aim directories using ifc
421    o introduced flag for controllin non-hydrostatic metric terms
422    o removed gravitySign from PARM04
423    o switched to g77/ifc from pgf77 in aim experiments
424    
425    checkpoint46l_post
426    o made convective adjustment work with pressure coordinates:
427     - changed the direction of k-loop in convective_adjustment.F for the
428       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
429     - adjusted the reference pressure k-index in convective_adjustment.F
430     - adjusted the convection condition in convect.F (in analogy to
431       calc_ivdc.F)
432     - convective_adjustment no longer computes anything on the halos
433     - removed the warnings about negative salinity from find_rho.F and
434       find_alpha.F; instead the new routine look_for_neg_salinity, called
435       at the beginning of find_rho, find_alpha, and find_beta, does a
436       check of the entire slice, if CPP-option
437       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
438    checkpoint46l_pre
439    
440    checkpoint46k_post
441    o fixed the verification/global_ocean.90x40x15 experiment:
442     - new bathymetry (the world according to A., JMC, and M.)
443     - new initial fields and forcing fields (*.bin files)
444     - new POLY3.COEFFS (for the next release one should switch to a full
445       equation of state: JMD95P or MDJWF)
446     - fixed several errors and redundancies in the data file
447     - experiment uses looped cells
448     - added matlab directory with diagnostic scripts for plotting of output
449    
450    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
451     - read AIM physics parameters from a file (data.aimphys)
452     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
453    
454    checkpoint46j_post
455    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
456    o move wVel computation at the end of the time step, in S/R integr_continuity
457    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
458    o update timeave pkg for wVel diagnostic.
459    checkpoint46j_pre
460    
461    checkpoint46i_post
462    o Clean up AIM package (and keep the results unchanged):
463      include CPP_OPTION and use IMPLICT NONE in all routines ;
464      declare all the variables _RL ; use _d 0 for all numerical constants.
465      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
466    
467    checkpoint46h_post
468    o cleaned up the use of rhoNil and rhoConst.
469      - rhoNil should only appear in the LINEAR equation of state, everywhere
470        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
471        and the dynamical equations are all divided by rhoConst
472    o introduced new parameter rhoConstFresh, a reference density of fresh
473      water, to remove the fresh water flux's dependence on rhoNil. The default
474      value is 999.8 kg/m^3
475    o cleanup up external_forcing.F and external_forcing_surf.F
476      - can now be used by both OCEANIC and OCEANICP
477    checkpoint46h_pre
478    
479     Added code to convert surface volume flux (fresh water) into
480     a mass flux when using P coordinates in the ocean (OCEANICP).
481     Note: It assumes you have set rho0=rhoConst=density of fresh water.
482    
483    checkpoint46g_post
484    o Include a new diagnostic variable phiHydLow for the ocean model
485      - in z-coordinates, it is the bottom pressure anomaly
486      - in p-coordinates, it is the sea surface elevation
487      - in both cases, these variable have global drift, reflecting the mass
488        drift in z-coordinates and the volume drift in p-coordinates
489      - included time averaging for phiHydLow, be aware of the drift!
490    o depth-dependent computation of Bo_surf for pressure coordinates
491      in the ocean (buoyancyRelation='OCEANICP')
492      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
493        Theta, Salinity, and Pressure in the parameter list. This routine is
494        presently contained in find_rho.F. This routine does not give the
495        correct density for 'POLY3', which would be a z-dependent reference
496        density.
497    o cleaned up find_rho
498      - removed obsolete 'eqn' from the parameter list.
499    o added two new verification experiments: gop and goz
500      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
501    checkpoint46g_pre
502    
503    checkpoint46f_post
504    o Enable tangent linear (forward mode) gradient checks:
505      - extended active file handling to g_... files
506      - added TANGENT_SIMULATION to theSimulationMode
507      - extended grdchk package accordingly
508    o added tangent linear setup in verification/carbon/code_ftl
509    o added adjoint setup in verification/front_relax/code_ad
510    
511    checkpoint46e_post
512    o Added new equation of state -> MDJWF
513      - EOS of McDougall et al., 2002, JAOT, submitted
514      - caveat: the equation of state is only valid for a smaller (more
515        realistic?) range of values than JMD95P/Z and UNESCO
516      - added masks to the calculation of pressure in store_pressure
517      - added more check values for density in check_eos (ini_eos.F), some of
518        the old check values are out of the range of the MDJWF-eos, so don't
519        expect perfect matches for those
520    checkpoint46e_pre
521    
522    checkpoint46d_post
523    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
524      'OCEANICP', also initialised field pressure correctly in ini_eos in the
525      case of pressure coordinates. eosType='JMD95Z' in
526      combination with buoyancyRelation='OCEANICP' now causes an error.
527    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
528      in find_alpha/beta.
529    checkpoint46d_pre
530    
531    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
532      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
533    
534    checkpoint46c_post
535    o Changes necessary for ocean in p-coordinates
536     -  Added new buoyancy relation = 'OCEANICP'
537     -  Added new parameters = gravitySign (this used to be contained inside
538        the factor dRdZ which I added when we first switched to R coordinates).
539     X GM/Redi is not compatible (yet)
540     X bottom drag and no-slip need to be debugged.
541    checkpoint46c_pre
542    
543    checkpoint46b_post
544    o Added new equation of state -> JMD95Z and JMD95P
545      - EOS of Jackett and McDougall, 1995, JAOT
546      - moved all EOS parameters into EOS.h
547      - new routines ini_eos.F, store_pressure.F
548    o Added UNESCO EOS, but not recommended because it requires
549      in-situ temperature (see JMD95)
550    o Modified formatting for knudsen2.f in utils/knudsen2 and added
551      unesco.f to be used with POLY3
552    checkpoint46b_pre
553    
554    checkpoint46a_post
555    o Added (atmospheric) pressure loading
556      - new field in FFIELDS.h, etc...
557      - new cpp flag ATMOSPHERIC_LOADING
558    o Changed hFacC to _hFacC in calc_phi_hyd.F
559    o Added SHORTWAVE_HEATING to some files for consistency
560    checkpoint46a_pre
561    
562    checkpoint46
563    further merges from release1_p5
564    o new ctrl package
565      - adopted from ECCO environment to enable optimization
566      - added Eliassen Palm fluxes to controls
567    o added Eliassen Palm flux controls to gradient check package
568    o cost package
569      - Compatible with new ctrl package
570      - added Eliassen Palm cost hooks
571      - modif's of existing cost functions
572    o Adjoint-related bug fixes in kpp:
573      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
574      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
575    o autodiff package
576      - flow directives:
577        + new for S/R do_the_model_io
578        + enhanced for S/R checkpoint
579        + new gmredi.flow
580      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
581        disable adcommon.h/g_common.h by default.
582      - fixed problem for adjoint of global_max
583    o modified verification/carbon/
584    o New setup for adjoint of global_ocean
585    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
586    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
587    o incorporated hooks for sponge layer code (external_forcing.F)
588    
589    checkpoint45d_post
590    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
591    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
592      (affects plume_on_slope "cg2d" output)
593    o add new parameter deltaTfreesurf for free-surface time stepping
594    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
595    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
596    o change phiMin in exp1 (to agree with documentation)
597    o add new flags:
598     - T,S forcing inside/outside Adams-Bashforth
599     - turn off temp,salt advection and/or forcing
600     - for each tracer, define internal flag for multiDimAdvection & A-B
601    o monitor: change definition of KE to check conservation of Energy
602    
603    checkpoint45c_post
604    o Removed f90 comments ("!")
605    o Modified initialisations to enable exf package for MITgcm
606      (without invoking ECCO_PACKAGE).
607    o modifications to gradient check package (Martin Losch)
608      - enable centered differences
609      - modified format of standard output
610    
611    checkpoint45b_post
612    o cleaned exchange calls in cg2d
613    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
614    o included CPP option SINGLE_LAYER_MODE in thermodynamics
615      to configure barotropic setup (Martin Losch)
616    o moved some initialisations within bi,bj loop in dynamics
617      (TAF flow dependency)
618    o in initialise_varia, moved call packages_init_variables
619      before convective_adjustment_init
620      (corresponding adjustment of TAF tape initialisation).
621    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
622    
623    checkpoint45a_post
624    o compute Rho over the whole domain (extend iMin,jMin indices)
625    o specific exchange for X-slice domain (case Ny=1)
626    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
627    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
628    
629    checkpoint44h_post = checkpoint45
630    o Fix to restore differentiability:
631      place at which packages_init_variables is called in
632      initialise_varia is crucial for reverse control flow.
633    o modifications in GMRedi to enable stable adjoint
634      (corresponding modif's in thermodynamics, dynamics)
635    o added missing hook for sponge layer code in external_forcing
636    o modified test cost functions
637    o storing in gad_advection (plus removal of write(0,*)!
638    o missing headers TR1.h added in convective_adjustment routines
639    o errorMessageUnit set non-equal zero in eeboot
640      (conflict on some platforms, e.g. IBM SP3)
641    o modified carbon verif.
642    
643    checkpoint44h_pre
644    o vertical grid option: allow to put the Interface at the middle between
645      2 cell-centers ; replace delZ in pkg/kpp by drF.
646    o GM Advective form: Tracers are advected using the residual transport (=
647      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
648    
649    checkpoint44g_post
650    o fix surface correction term in multiDimAdvection (affects plume_on_slope
651      results) ; ifdef missing in thermodynamics.F
652    
653    checkpoint44f_pre,checkpoint44f_post
654    o added PTRACERS package
655      This allows an arbitrary number of passive tracers to be integrated
656      forward simultaneously with the dynamicaly model.
657      + Implemented so far:
658        - basic forward algorithm (time-stepping, advection, diffusion, convection)
659        - I/O and checkpointing
660        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
661      + Not implemented so far:
662        - KPP
663        - OBCS
664      + No specific example supplied (yet) but global_ocean.90x40x15 has the
665        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
666        line in data.pkg.
667      + This package is disabled by default since it increases storage.
668    
669    
670    o testscript: added -cleanup option
671    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
672                 b) enable to filter 2D fields.
673    
674    checkpoint44e_pre,post
675    o re-wrote convective adjustment to use pre-calculated weights
676      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
677      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
678      Original calls to convect() still in place.
679    
680    chkpt44d_pre,post
681    o added missing EXCLUDE_MONITOR flags
682    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
683      (incompatible typ in MIN/MAX expressions caused problems
684      on IBM SP3)
685    o in genmake added variable MAKEDEPEND
686      plus resetting for case SunOS
687    o added timer_stats.c routine for IBM SP3
688    o removed variables in dynamics
689    !!! I forgot to create tag chkpt44d_pre !!!
690    !!! But chkpt44d_pre = chkpt44c_post    !!!
691    
692    o real fresh water flux implemented with non-linear free-surface.
693    
694    chkpt44c_pre,post
695    o few fix (mask in shap_s2, EmPmR in external_field_load,
696      USE_NATURAL_BCS in solve_for_P);
697    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
698    
699    checkpoint44b_pre/_post
700    o merge of relevant stuff from the ecco-branch:
701      - genmake: removed $S64 overwrite for case SunOS
702      - pkg/exf: update and corrections for field swapping and obcs
703      - pkg/ecco: parameter lists for the_model_main, the_main_loop
704                  harmonized between ECCO and MITgcm
705      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
706                      updated checkpointing_lev... lists for obcs
707      - model/src: minor changes in forward_step, plot_field
708                   added directive for divided adjoint in the_main_loop
709      - pkg/mdsio: added mdsio_gl_slice
710    
711    o check parameters & config (chkpt44a_pre,post)
712    o OBC and NonLin_FrSurf.
713    
714    checkpoint44
715    o fix bug in mom_vi_del2uv
716    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
717    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
718    o update AIM experiments (NCEP input files)
719    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
720    o added some stuff for AD
721    
722    checkpoint43
723    o added two new advection tests
724    o added global 4x4 degree ocean test
725    o added test of H&S94 with free surface on cube
726    o some final mods for gradient check, adjoint,...
727    
728    checkpoint42
729      Fixed AD-related problems:
730    o Store directives up-to-date with re-arranged Adams-Bashforth
731      (mainly thermodynamics.F)
732    o New store directives for multi-dim. advection schemes
733      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
734      * new common block and key passkey
735      (mainly gad_advection.F)
736    o Modified store directives for split of dynamics/thermodynamics
737      for the case ALLOW_KPP
738    o Cleaned argument list for timestep_tracer.F
739    
740    checkpoint41
741    o re-formatted/added comments in prologues of key subroutines
742      to work with protex
743    
744    checkpoint40
745    o moved calc_gs, calc_gt and calc_tr1 back to model/src
746    o added FLT (floats) package from Arne along with demo. experiment
747    o re-arranged Adams-Bashforth scheme for tracers to allow easier
748      implementation of forward-in-time forcing terms
749    o more mods for non-linear free-surface including new variable
750    o modified multi-dim method to work on cube
751    o bug fix in KPP (from DM)
752    
753    checkpoint40pre9
754    o added DST advection schemes
755    o fix MPI bug on SGI's
756    o modifications for non-linear free-surface
757    o fixed conditionals for fixed flow/passive tracer only mode
758    o added tension/strain form of stress tensor
759    o changes to commenting of arguments for TAF/TAMC
760    o added/updated many matlab scripts
761    o added multi-dimensional advection method for tracers
762      
763    checkpoint40pre8
764    o new package rw/
765      Added method for dumping intermediate local arrays:
766      mdsio_writetile - same as mdsio_writefield except works from inside
767                        bi,bj loop
768      mdsio_writelocal - same as mdsio_writetile except works for local
769                         arrays
770      write_local_r? - higher-level wrapper for mdsio_writelocal
771      Controlled by diagFreq. Defaults to zero (ie. no dumps)
772      Example given at end of mom_vecinv.F that dumps some local arrays.
773    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
774      control flux-form versus vector invariant code.
775      Switch is runtime flag vectorInvariantMomentum (defaults to false)
776      or genmake -DISABLE ...
777    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
778      (additional storing is now needed for case vecinv;
779      currently nothing implemented to switch this storing off
780      in case fluxform is used since no CPP flag available).
781    
782    checkpoint40pre7
783    o bug fix in dynamics.F
784      calc_viscosity called before k=1,Nr loop.
785    o added some #ifdef's ALLOW_PASSIVE_TRACER
786    o cleaned initialisations in ctrl_map_ini
787      related to TAF
788    
789    checkpoint40pre6
790    o split dynamics into thermodynamics & dynamics
791    o corresponding split of calc_diffusivity into
792      calc_diffusivity, calc_viscosity
793      (kpp_calc_diff, kpp_calc_visc).
794    o Added diffkr, kapgm to control variables
795    o bug fix in gmredi_slope_limit for ldd97
796    
797    checkpoint40pre5
798    o proper initialization of Adams-Bashforth time stepping
799      + uses forward step for very first step of model (iter=0)
800    o re-generated *all* output since almost all output is modified by this
801      change (sorry but we've been putting this one off for about 2 years)
802      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
803        *not* regenerated since they are already out of date and I don't
804        want to create the impression that they are suddenly working.
805    o removed KAP stuff for DEC's
806    o modified/added many .cvsignore files in */code and */input
807    o added new expt "solid-body.cs-32x32x1"
808      + this uses an alternative form of ini_curvilinear_grid.F which
809        is not necessarily any better than the current one...
810    
811    checkpoint40pre4
812    o added re-initialisations of utrans,vtrans,rtrans in
813      calc_common_factors which are crucial for TAF.
814    o extended iMin,jMin range for calc_common_factors,
815      calc_diffusivity
816    o added option ALLOW_PASSIVE_TRACER
817    o a few minor updates and fixes
818    
819    checkpoint40pre3
820    o created calc_gtr1.F for gad package
821    o split the_main_loop and re-introduced forward_step
822    o some recomputations of nIter0 for TAMC
823    
824    checkpoint40pre2
825    o Updated to latest branch of AJA, JMC
826    o Added gradient check package
827    o Added routines for passive tracer handling
828    o Added carbon sequestration sensitivity experiment
829    
830    checkpoint39
831     o Modifications and fixes to support TAMC
832       (mainly missing or wrong directives)
833     o Corrected common blocks when fooling TAMC to produce adjoint I/O
834       in addummy_in_stepping
835     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
836     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
837     o Included following packages:
838       cal: calendar
839       exf: external forcing
840       ecco: essential routines to control use of cal, exf
841             (NB: this is not the full ECCO environment)
842     o disabled some packages by default in genmake
843    
844    checkpoint38
845     o see notes_c37_adj.txt
846     o corrected wrong layer index in external_forcing_t
847     o replaced the_main_loop/forward_step by the_main_loop
848     o removed forceoutput from write_state
849       (replaced criteria for initial/final state)
850     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
851    
852    checkpoint37
853     o mdsio.F routine split and packaged in pkg/mdsio
854       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
855        used unless genmake -disable=mdsio)
856     o allow a more precise surface-geopotential gradient for the atmosphere
857       taking into account the change in space of Alpha (=1/rho) at the surface.
858     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
859       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
860     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
861       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
862       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
863     o Time-Average diagnostics defined as a pseudo package "timeave".
864     o pickup files : old pickup (before c35) did not work with new code (c35
865       and after) unless activating 2 commented lines in initialise-varia.
866     o Non-Hydrostatic pickup file Pb fixed.
867     o bug with Rigid-lid version (since c35) fixed.  
868    
869    checkpoint36
870     o implement Crank-Nickelson barotropic time-stepping
871     o recover Time-Average diagnostics
872     o fix Pb in checkpoint (PR#19)
873     o AIM become a standard package ; clean unused CPP_kees
874    
875    checkpoint35
876     o subtantial rewrite of dynamics.f
877     o allows staggered time-stepping
878     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
879     o added bottom drag (linear + quadratic)
880    
881    checkpoint34
882     o Modified exchange routines for correct reverse simulation.
883     o Added verification output to comply with bug fix in impldiff.F
884       as of c33 (exp2, natl_box).
885     o Corrected store directives in dynamics.F
886     o Corrected array boundaries in impldiff.F
887     o Corrected array dimensions in gmredi.
888       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
889     o Added routine GLOBAL_SUM_INT to global_sum.F
890     o Added mdsio_gl.F for ECCO purposes.
891    
892    checkpoint33
893     o Fixed bug in lower BC in impldiff.F
894     o Fixed confusion about units of forcing arrays in FFIELDS.h
895       namely Fu,Fv,Qnet,Qsw,EmPmR:
896       - Removed verification/natl_box/code/external_fields_scale.F
897         (did not differ from that in model/src)
898       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
899         (see FFIELDS.h for description)
900       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
901         kpp_calc.F and kpp_transport_t.F
902       - Removed model/src/external_fields_scale.F and calls to it
903       - verification/natl_box uses flux data with "atmospheric" sign so
904         a special version of external_fields_load.F is used to
905         change the data as it's read in. This way, the arrays
906         have the right units and signs at all times tha a user could
907         possibly use them.
908     o Corrected genmake to delete a temporary file during configuration
909    
910    checkpoint32
911     o Scaling of forcing fields moved from external_forcing.F to
912       external_fields_scale.F, called directly after loading fields.
913     o Surface relaxation terms added to surface tendency fields in
914       extra subroutine.
915     o impldiff.F changed to avoid storing by TAMC of huge intermediate
916       fields.
917     o Changes in GMRedi to comply with packaging structure.
918     o Modifications and bug fixes in KPP package.
919     o Verification experiment for KPP added (verification/nat_box/)
920    
921    checkpoint31
922     o Packages interface brought in line with defined standard
923       -> new routines packages_...F
924       -> changes in initialise_fixed.F, initialise_varia.F
925       -> enables initialisation interface for ECCO package
926     o Rescaling of external forcing fields immediately after read
927       (removed from external_forcing.F)
928       -> new: surface_fields_scale.F
929       -> affects ini_foorcing.F, external_fields_load.F
930     o Computation of surface tendencies before tendency updates.
931       -> new: external_forcing_surf.F
932     o Change of variable names useGMRedi, useKPP, useECCO
933     o Further changes in dynamics.F, impldiff.F for TAMC
934     o Tested for experiments 0, 2, 4.
935       - not yet tested for GMRedi.
936       - not yet tested for KPP.
937    
938    checkpoint30
939     o Updates for OBCs
940     o New experiment for test OBCs (internal_wave)
941     o New output.txt in verification/exp4/results/
942     o Updates for KPP: calculation of viscosity corrected, new variables
943       kpp_dumpFreq and kpp_taveFreq
944     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
945       and entry for T90 in genmake
946    
947    checkpoint29
948     o packaged KPP and GM/Redi
949    
950    checkpoint28
951     o Corrected initialization of hFacMin for difference vertical coordinates
952     o Modified calculation of partial cell thickness to more robust algorithm
953     o config_summary.F: replaced write_1D_... by write_0D_...
954       read_write.F: added subroutines write_0D_...
955     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
956       included some initialisations required for TAMC.
957     o routine calc_isoslopes: modified sqrt computation to make it
958       differentiable for zero argument.
959     o routines dynamics, impldiff:
960       included store directives and tape key computations required for TAMC.
961     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
962    
963    checkpoint27
964     o fixed calc_isoslopes() to so that cancellation of terms in tensor
965       formulation works properly with variable resolution.
966     o restructured the calling tree between the_model_main() and dynamics()
967     o split initialise() into initialise_fixed() and initialise_varia()
968     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
969       in new routine ini_psurf()
970    
971    checkpoint26
972     o moved some #ifdef in optional routines to encompass everything
973       except the argument declarations. This was using up some memory.
974     o fixed macros like _ADT to work with both versions of Linux cpp
975     o cleaned up some unused and uninitialized variables
976       (helps when debugging with strict compile options)
977     o split up CPP_EEOPTIONS.h into options and macros
978       (macros are now in eesupp/inc/CPP_EEMACROS.h)
979     o patch for 2 processor JAM mode
980    
981    checkpoint25
982     o updates for OBCs and NH
983     o dramatically reduced memory usage
984     o added "JAM" routines for use on Artic network
985     o parameterization of convection by implicit vertical diffusion
986     o added a diagnostic of convective index
987     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
988       (this is was partly for OBCs and NH but also in anticipation of
989        an explicit free-surface option)
990     o initial state input files for U and V
991    
992    checkpoint24
993     o Removed some spurious "REAL"s
994     o Updated KPP to latest version from JPL
995     o Added a COS(latitude) in horizontal viscosity
996    
997    checkpoint23
998     o Added del^4 diffusion for salt and temperature
999     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1000    
1001    checkpoint22
1002     o Made many small changes: implicit none, format(i5), etc...
1003     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1004    
1005    checkpoint21
1006     o Introduced new I/O package that supports direct-access records (mdsio.F)
1007     o Split-up mid-level I/O routines
1008     o Updated input data for experiments 0,1,2,4 and 5
1009     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1010    
1011    checkpoint20
1012     o Tidied up open-boundaries some more
1013     o Added non-hydrostatic code
1014     o Fixed some input data
1015     o Modified MPI start-up to work in "coupled" context.
1016    
1017    checkpoint19
1018     o Tidied up directory structure for verification experiments.
1019     o Added new code for open boundaries.
1020     o Corrected advective terms near boundaries.
1021     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1022     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1023     o Split default parameters out of ini_parms.F into set_defaults.F.
1024    
1025    checkpoint18
1026     o Further changes for optional code generation with
1027       CPP - ugh!
1028    
1029    checkpoint17
1030     o Beginning to incorporating modularity
1031       for supporting atmos. and ocean configs.
1032     o Small changes for TAMC complinace
1033     o New ultra simple test case. Barotropic box
1034       configuration "exp0".
1035    
1036    checkpoint16
1037     o Minor changes to exchange routines to support
1038       accumulation in reverse mode. Adjoint of an
1039       assignment is an addition.
1040     o Changes to support compilation by TAMC (LR(1)
1041       syntax) and by g77 under Linux ( 72 character
1042       limit ).
1043    
1044    checkpoint15
1045     Rewrote exchange routines to allow
1046     o General tile <-> tile connectivity.
1047     o TAMC reverse mode flag ( is this really needed? )
1048     o Variable width overlap and exchange region widths.
1049     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1050       shmput/shmget, VIA, SYSV shmem and every other cool
1051       communication method.
1052    
1053  checkpoint14  checkpoint14
1054   Consistent isomorphism chages made. These allow dynamical core   Consistent isomorphism chages made. These allow dynamical core
1055   to support both pressure and meters as a vertical coordinate.   to support both pressure and meters as a vertical coordinate.

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