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revision 1.14 by cnh, Tue Sep 29 18:57:53 1998 UTC revision 1.785 by dimitri, Wed Apr 11 00:00:47 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
8      vertical diffusivity, similar to that in MOM4; vertical diffusivity is
9      specified using diffKrBL79* diffKrBLEQ* and KbryanLewisLatTransition
10    o Added capability for 3D specification of background vertical diffusion
11      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
12      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
13      "data" file that contains the 3D vertical diffusivity coefficients.
14    o ice dynamics (pkg/seaice) with thsice thermodynamics:
15      - add code within pkg thsice to advect & diffuse sea-ice fields
16      similar to (and will replace) what has been added in  seaice_advdiff.F,
17      but: - conserving Mass, Heat & Salt.
18           - better when using non-linear advection scheme (not yet fully tested)
19           - can also be used in atmospheric set-up (for now, only the diffusion).
20    
21    checkpoint58x_post
22    o IO option for global-file compact format:
23      - add options when generating topology (utils/exch2/matlab-topology-generator)
24      - add I/O capability (pkg/mdsio).
25      - adapt utils/matlab/rdmds.m to read this format.
26      for now long-line format not yet supported by pkg/mdsio (& exch2).
27    o shelfice: add a few diagnostics
28    
29    checkpoint58w_post
30    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
31      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
32      (and replace horiVertRatio in NH code).
33      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
34                         and tutorial_plume_on_slope (sensitive to truncation)
35    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
36      directly to drive seaice model (C-grid only)
37    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
38     - reintroduce computation of wind from stress,
39     - compute tau (in exf_bulkformulae.F) from windstress averaged to
40       mass points to avoid tau = 0
41     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
42    o rdmnc.m: make it work with "global" files created with gluemnc
43    o rdmnc.m : some improvements in dealing with singleton dimension
44      (tested on all testreport mnc output files).
45    o genmake2: disable pkg/profiles if netcdf test fails.
46    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
47    o move call to cal_readparms up to make calendar parameters/variable available
48      to all packages
49    
50    checkpoint58v_post
51    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
52      useDynP_inEos_Zc tested.
53    o pkg/exf: changes to properly interpolate/mask/scale initial fields
54    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
55      and portions thereof.  See read_cs.txt for description and examples.
56    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
57      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
58      following the great-circle arc between those 2 points.
59    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
60      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
61    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
62     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
63     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
64     - still needs work (not working with some options ; efficiency to improve)
65       and serious testing.
66     - use this scheme for temperature & salinity in 2 advection test exp.:
67       advect_xy & advect_xz, respectively.
68    
69    checkpoint58u_post
70    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
71    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
72    o testreport: add option "-skipdir" to skip some test.
73    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
74      momentum calculation.
75    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
76    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
77      remove checkpoint.F and the_correction_step.F (no longer used);
78      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
79    o add option (linFSConserveTr) to correct for tracer source/sink due to
80      Linear Free surface
81    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
82    o pkg/thsice: fix reading mnc-pickups
83    
84    checkpoint58t_post
85    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
86    o pkg/mdsio:
87     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
88       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
89       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
90     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
91     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
92       either MDS_READ_FIELD or MDS_WRITE_FIELD )
93     - new S/R (to replace MDSWRITEMETA), which allows to write more
94       informations (variable names, time ...) to meta files.
95     - modify rdmds.m to give back the meta file content.
96    o pkg/diagnostics: change vertical interpolation to be safer, and more
97       flexible (define p-levels to interpolate to in data.diagnostics);
98      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
99       diagnostic pointer.
100    o pkg/seaice: more cleaning up of seaice_growth, added many comments
101    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
102    o fix multi-category seaice:
103     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
104       SEAICE_MULTICATEGORY
105     - fix short wave heat flux
106    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
107       and allow to use EVP solver. Change forward lab_sea: test both EVP
108       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
109    o Initial check-in of lab_sea adjoint
110      (very similar to natl_box_adjoint/code_seaice)
111      * used C-grid and EVP solver
112      * used KPP, GM/Redi
113      * uses inAdExact=.TRUE.
114      * gradient checks fail for both ADM and TLM
115        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
116        f.d. gradients actually seem more problematic than ADM, TLM gradients;
117        issue is related to forward mismatch between g77 an ifort
118    o pkg/seaice: overhaul of thermodynamics
119     - growth.F and groatb.F are replaced by new routine seaice_growth.F
120     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
121     - move a few global fields out of SEAICE.h into seaice_growth.F and
122       make them 2D (FICE/QNETO/ ...)
123     - remove FO (it is the same as QNETO)
124     - introduce a few local fields to avoid modifying external fields such
125       as atemp, etc.
126    
127    checkpoint58s_post
128    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
129      changed exf_set_gen.F so that
130        genperiod=0 means input file is one time-constant field and
131        genperiod=-12 means input file contains 12 monthly means
132    o CG2D: use pre-computed solver main-diagonal (stored in common block);
133      this affects truncation error ; generate new output file for exp. which
134      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
135        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
136        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
137        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
138        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
139        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
140    o start implementation of deep-atmosphere and anelastic formulation
141    o verification: remove 2nd copy of input files and use script "prepare_run"
142      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
143    o mom_common/vecinv/fluxform: fix a few initialisation isssues
144    o profiles: fix for multithreaded case
145    
146    o diagnostics: rename few diags:
147      s/'PRESSURE'/'RCENTER '/g
148      s/'TICE    '/'oceFreez'/g
149      s/'TAUX    '/'oceTAUX '/g
150      s/'TAUY    '/'oceTAUY '/g
151      s/'SWFLUX  '/'oceQsw  '/g
152      s/DIFx/DFxE/g
153      s/DIFy/DFyE/g
154      and add few ocean-forcing diagnostics:
155      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
156    o modifications to pkg/seaice/growth.F and budget.F, which change results of
157      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
158      as actual snow thickness.  It now refers everywhere to effective snow
159      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
160    
161    checkpoint58r_post
162    o modifications to pkg/seaice/growth.F, which change results of
163      lab_sea experiment: fixes pertain to melting snow over open water, to
164      masking EVAP under sea ice, and to using the correct AREA variable for
165      computations of EVAP, PRECIP, HSNOW, and GHEFF
166    o add ability to read bathy, salt, and theta using MNC (off by def)
167    o add flooding algorithm and advection of HSNOW for pkg/seaice;
168      both are turned off by default and do no change any results
169    o seaice advection with pkg/thsice: a step toward the use of non-linear
170      advection scheme, but #ifdef or commented out for now (requires more EXCH).
171    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
172      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
173      in natl_box (affects results @ truncation level: update output.txt)
174    o multi-threading and IO:
175      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
176      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
177        (needed to work with SingleCpuIO): tested in all verif. exp.
178    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
179      affects the results (but none of the verification test uses this scheme).
180    o Adding some pkg/diagnostics capability to pkg/seaice
181      (will certainly be subject to changes)
182    o ctrl: adding new control variables:
183      lwflux, lwdown, evap, snowprecip, apressure, runoff
184    
185    checkpoint58q_post
186    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
187      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
188      high_res_cube configuration by 4% on Columbia.
189    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
190      add (in global_with_exf/code) a version of EXF_INTERP_READ without
191      dynamical allocation (seems to work in multi-threaded).
192    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
193      single CPU io) so that TAF does not have to see EESUPPORT.h
194    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
195    
196    checkpoint58p_post
197    o obcs: stop if obcs is used with useCDscheme = .true.
198    o shelfice:
199     - fix a sign error so that no slip at shelfice interface works
200     - remove stop for combination non-hydrostatic code and shelfice. That does
201       not mean, that the results are correct, but at least they are numerically
202       stable
203    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
204    o added adjoint exch routined for all exch*3d* routines
205      and updated flow directives
206    
207    checkpoint58o_post
208    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
209      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
210    o change controling S/R for writing pickup file (new S/R do_write_pickup)
211      and clean-up reading/writing of pickup files.
212    o fix local version of read/write pickup (NH part) in rotating_tank/code
213    o simplify EXCH interface:
214     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
215     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
216    o added the regrid package
217    o shelfice:
218     - add a simple boundary layer scheme to reduce noise
219     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
220    
221    checkpoint58n_post
222    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
223       local variable (not in common block).
224    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
225      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
226      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
227        to work with SingleCpuIO.
228    o add "_d 0" to real constant of pkg/cfc subroutines ;
229       update exp. cfc_exemple & tutorial_cfc_offline output files.
230    o multi-threading and IO:
231      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
232        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
233      - barrier before and after reading.
234      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
235      - avoid using MDS_WRITELOCAL for LAND pkg output.
236      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
237        common-block variables ; Allows multi-threading with master-thread IO.
238    o change default MAX_NO_THREADS from 32 to 4 ;
239      and stop cleanly when MAX_NO_THREADS is too small.
240    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
241    
242    checkpoint58m_post
243    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
244       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
245    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
246       keep global_ocean.90x40x15 (for AD testing) with former secondary test
247       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
248    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
249        add MITgcm_tutorials (= code + all the tutorials)
250    o ecco, option to compute cost for total ssh (mean+anom)
251    o consistent with addition of ptracer and ssh in pkg/profiles
252    o profiles: adding ptracer and ssh
253    o testreport: change multi-test output-file name
254      (from output.txt.{name} to output.{name}.txt)
255    o profiles: now ok for mutli-tiles case
256    o seaice: add 4 parameters for different advection schemes for area,
257      (effective) seaice thickness, enthalphy, and snow height. Their default
258      is the standard parameter SEAICEadvScheme
259    o calc_gw:
260     - add cosFacU in zonal viscous flux (harmonic.visc.).
261     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
262       of tutorial_plume_on_slope.
263    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
264    o calc_gw: true flux-form, account for horizontal grid spacing.
265      update rotating_tank results, but not plume_on_slope (affected at
266      truncation level, 11 digits).
267    
268    checkpoint58l_post
269    o calc_gw:
270     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
271     - remove side-drag for now (need to fix it); update plume_on_slope results.
272     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
273    o commit code to make SST/SSS weights spatially variable
274      (based on either variable in-situ or variable initial T/S weights)
275    o pkg/ecco:
276      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
277        now based on horizontally varying weights wthetaLev, wsaltLev
278      * cost_averagesflags now returns year indices in addition to day, month
279      * sflux balance is performed on annual basis
280        (sflxumm, sfluxmm2, bal_sfluxmm)
281      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
282        including separate counting and multipliers
283    o pkg/rbcs
284      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
285    
286    checkpoint58k_post
287    o testreport:
288     - always build in dir. "build" (if not there, mkdir build instead of building
289       & running in input)
290     - run in dir run (if it exists), in build otherwise.
291     - call prepare_run (if input/prepare_run exists)
292     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
293    o pkg/exf modifications to interpolation and rotation routines for more
294       reasonable treatment of North Pole singularity: for tracers North Pole
295       value is set to northernmost zonal-mean value, for zonal velocity it is
296       set to zero, and for meridional velocity it is set to northernmost value.
297    o pkg/exf/exf_check_range.F
298     - add tile index to diagnostics and move stop statement to the very
299       end of the routine.
300    o pkg/diagnostics: (diagnostics_main_init.F)
301      define title of isomorphic variables according to the current config.
302    o pkg/thsice with pkg/seaice dynamics:
303    - fix domain of computation (interior only, required for exf) and do exchanges
304    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
305    o towards a standard way of dealing with multi-threading in MONITOR
306      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
307    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
308       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
309    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
310    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
311    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
312       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
313    o tracer advection:
314     - clean-up and simplify calc_common_factors.F
315     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
316       advection subroutine (but still not used within DST advection S/R)
317    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
318    
319    checkpoint58j_post
320    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
321      from file (collects calls previously in FORWARD_STEP)
322    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
323    o adjoint store dir. adjusted accordingly
324    o genmake2
325      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
326    
327    checkpoint58i_post
328    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
329      on wind stress (SEAICEstressFactor defaults to 1.)
330    o Total number of Timers is finite (<=40): comment out 2 non-essential one
331      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
332    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
333      on CS-grid: no longer loosing mass.
334    o exf & curvilinear-grid: no longer modify longitude xC & xG.
335    o pkg/ggl90: fix sloppy output and fix a bug
336    o pkg/seaice: added SEAICEuseEVPpickup parameter
337      - Set to false in order to start EVP solver with
338        non-EVP pickup files when using SEAICEuseEVP
339      - fix sign error in diffusion in seaice_calc_rhs
340    
341    checkpoint58h_post
342    * Modifications for bottom topography control
343      o replace hFacC by _hFacC at various places
344      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
345      o add non-self-adjoint cg2d_nsa
346      o update autodiff support routines
347      o re-initialise hfac after ctrl_depth_ini
348      o works for 5x5 box, doesnt work for global_ocean.90x40x15
349    * Adding verification for 5x5 box (4-layer) bottom topography control
350    
351    checkpoint58g_post
352    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
353       used for mean seasonal cycle, mean diurnal cycle); add an example
354       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
355    o pkg/ggl90:
356      - add parameter (minimum surface kinetic energy)
357      - fix bug (avoiding division by zero)
358    o couple pkg/thsice to pkg/seaice:
359      - modify advection in seaice to accomodate new scalar fields to be advected
360      - only muliDimAdection scheme work with seaice/thsice
361      - mapping of thsice-variables to seaice-variables, back and forth
362      - does not break the verification experiments, but does not give the
363        desired results either
364    o pkg/seaice
365      - make (default) second order advection a bit less confusing?
366    
367    checkpoint58f_post
368    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
369      to pkg/seaice):
370      - new routines thsice_map_exf and thsice_get_exf provide the interface
371      - add an additional formal parameter to thsice_solve4temp
372    o pkg/exf:
373      - add new fields wspeed, snowprecip (to be able to couple to thsice)
374      - correct Stefan-Boltzmann constant
375      - new parameter for longwave surface emittance
376      - separate some stuff from exf_bulkformulae into new routines  
377        exf_radiation, exf_wind
378      - add new parameters and constants: longwave emissivity for ocean, ice
379        and snow, evaporation parameters over ice
380      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
381        either wind from stress or stress from wind
382    o pkg/thSIce:
383    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
384    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
385       and THSICE_CALC_THICKN
386    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
387    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
388      to make debugging easier.
389    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
390    o pkg/bulk_force:
391      - clean-up comments and parameters ;
392      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
393    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
394      generate new output for test-experiment: aim.5l_cs.thSI
395    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
396      testreport accordingly
397    
398    checkpoint58e_post
399    o SEAICE_CGRID adjoint done
400    o R_STAR adjoint implemented.
401      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
402      * need to sort out init. of h0facc, etc.
403    o Make pkg/profile fully independent of ecco,cost, etc. stuff
404      to be able to use it in pure forward.
405    
406    checkpoint58d_post
407    o upgrade simple test-experiment to tutorial example:
408     step.1: duplicate the experiment and (step.2) will remove the old copy.
409      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
410      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
411      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
412      tutorial_global_oce_biogeo    <- copy of dic_example
413      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
414      tutorial_plume_on_slope       <- copy of plume_on_slope
415      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
416      tutorial_global_oce_optim     <- empty for now (David ?)
417      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
418     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
419    o correct a sign problem in cost_scat.F
420    o obcs and ptracers: fix boundary conditions for advections schemes
421      with larger stencil
422    o thsice adjoint: start
423    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
424      completeness
425    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
426      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
427    o ptracers adjoint:
428      * avoid extensive recomputatations
429      * fix missing re-init. of gptr (missed by TAF)
430    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
431      me to turn off the excessive output to STDOUT that this package produces
432    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
433      and add those terms in Vector-Invariant formulation.
434    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
435      if the control period (xx_hfluxperiod etc) is 0
436    o in profiles pkg, clean routines and fix details
437    o in ecco pkg, reading ssh data:
438      fix problem in case the model does not start at iter0=0
439    o fix mnc-pickup/restart for ptracers
440    o new package prifiles:
441      code to compute profile-based cost by Gael Forget
442      (modifs in ecco, ctrl, autodiff)
443    o Benign bug fix in initialization (spotted by M. Mazloff) of
444      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
445    
446    checkpoint58c_post
447    o adjoint: finish NLFS adjoint and provide reference output in
448      verification/global_ocean.90x40x15/results_ad_nlfs
449    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
450      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
451      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
452      with SEAICE_CGRID defined.
453    o move calendarDumps from "data" to "data.cal" and clean-up the code
454      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
455    o add useEXF & useCAL flags (for now, set in hard-coded way)
456    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
457      (were missing in NH mode, and wrong in quasihydrostatic mode).
458      waiting for Chris updated version of calc_gw to add those CALLs.
459    o fix bug in quasihydrostatic S/R ;
460      add a test for this option: global_ocean.90x40x15.qshyd
461    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
462      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
463    o add on/off flag useOffLine for package OFFLINE
464    o seaice:
465      - modify advection so that it works also on the C-grid
466      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
467        problem in multi-tile runs with C-grid
468      - add flags for clipping ice velocities and/or masking solver forcing
469      - fix drag (ocean on ice) formulation and a bug that caused noise in the
470        C-grid solver
471      - added a few comments to seaice_diffusion.F
472      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
473        are now exclusive)
474      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
475        required re-ordering the code a little:
476       + make DAIRN global variable (defined in SEAICE)
477       + move computation of the viscosities eta and zeta into a new separate
478         routine (because I need to recompute them in seaice_ocean_stress.F)
479    
480    checkpoint58b_post
481    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
482      update output.txt of exp. aim.5l_cs.thSI
483    o various mnc cleanups and improvements:
484      + shrink lookup tables by factor of ~4
485      + better error reporting when running out of lookup space
486      + able to handle longer path/file names (up to 500 chars)
487    o adjoint:
488      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
489      - TBD: "hidden" mom_vecinv recomp. in dynamics
490    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
491     (allow to differentiate between forcing components using new integer flags:
492      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
493     and add new flag to put Dissipation tendency out of Adams-Bashforth.
494    o ecco
495      - enable trend removal from SSH anomaly obs.
496    o adjoint
497      - a fix for PmEpR when #undef EXACT_CONSERV
498      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
499      - try to fix "hidden" recomp. in forward_step for NLFS
500        (NLFS seems broken sometimes after I checked it in)
501    o seaice:
502     - add c-grid version of the dynamic solver:
503       + three new routines that are the c-grid substitute lsr, dynsolver
504         and ostres
505       + put a few fields that were local to dynsolver into global common
506         blocks, so that I can move the computation of stresses etc into
507         seaice_lsr (saves coding but may break the adjoint).
508     - replace more hardwired parameters by runtime parameters
509     - add ice masks that mask the rhs of the implicit solvers where there
510       is no ice (commented out in seaice_dynsolver, because i am not sure
511       if this works properly), eventually this should replace the clipping
512       of ice velocities in seaice_dynsolver to +/-40cm/s.
513    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
514      include it only where its needed
515    o move balancing of fluxes before the call of external_forcing_surf
516    o seaice:
517      - correct units of turning angles (now they are really in degrees)
518      - move computation of GWATX/Y out of main routine into dynsolver
519      - initialize GWATX/Y in seaice_init
520    o Apply mask on Fresh-Water flux (needed for SSH forcing).
521      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
522    o seaice: add runtime flags for turning angles (default to zero)
523    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
524      and trend from exf forcing and ctrl control adjustments
525    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
526      (since checkpoint57x_post)
527    o change the default rotation period to 86164.s = the Earth rotation
528    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
529      and based on a reference stratification. Tested within hs94.cs-32x32x5.
530    o seaice advection: add code for choosing between the default (2nd order
531      central differences) and multiDim advection schemes provided by
532      pkg/generic_advdiff
533    o seaice:
534      - removed all references to SEAICE_GRID.h fields from
535        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
536        (cubed-sphere configuration will change a little)
537      - grid computations in seaice_init are obsolete now.
538      - cleaned up code a little so that is easier to read (hopefully).
539      - added new (better?) discretizations of default advection and diffusion
540        (turn on with SEAICEuseFluxForm)
541      - replace 1 in 3d global fields by kSurface in growth.F
542      
543    checkpoint58a_post
544    o seaice:
545      - bug fix in advect.F
546    o shelfice:
547      - separate shelfice load anomaly from pload (breaks with time
548        dependent forcing), => introduce constant field shelficeLoadAnomaly.
549        Its default is 0., but it may be computed more cleverly from (unknown)
550        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
551        done offline. A good approximation of the pressure load anomaly is
552        necessary to avoid large initial adjustment processes underneath
553        deep-reaching shelfice.
554      - small fix in ISOMIP shelfice_thermodynamics
555      - add more sophisticated thermodynamics of Hellmer (1989), this is
556        now the default
557      - give a few constants more intuitive names
558    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
559      if bulk formulae are used in long integration (especially EmPmR). Turn
560      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
561      if balancePrintMean, the imbalance that is substracted is printed to
562      STDOUT.
563    o fix bug (typo) in obcs_apply_eta.F
564    o add a new package shelfice which enables us to model the circulation
565      underneath shelf-ice with draughts of hundreds of meters.
566     - works
567     - to do: + include improved thermodynamics
568              + check whether kSurfC (from model/inc/SURFACE.h) can be used
569                instead of new field kTopC
570              + can we use topoFile, Ro_surf and existing code in ini_depth.F
571                instead of new field R_shelfIce and new code in ini_depth.F
572                and ini_mask_etc.F?
573              + adjust vertical mixing schemes?
574    o seaice pkg:
575     - add a cpp-flag to include a simple formula for a salinity dependent
576       freezing point of sea water at the surface
577     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
578       meridional stresses are now different (and hopefully correct)
579    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
580       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
581       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
582    o pkg/diagnostics: add options and parameters for regional-statistics
583       diagnostics ; define regions by reading a region-mask from a file
584       (might add other options later)
585    o pkg/bulk_force:
586     - add option and parameters to use AIM surface-flux formulae.
587     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
588       others forcing fields (defined in PARM05, parameter file "data") are loaded
589       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
590     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
591     - use the right EXCH call for uwind,vwind (to work on CS-grid).
592     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
593       and parameters (note: calcWindStress replaces .NOT.readwindstress).
594     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
595    
596    checkpoint58
597    o add "--embed-source" option to genmake2 which, when the supporting
598      tools can be compiled (as determined by genmake2) will turn on the
599      embed_files package which then embeds the entire MITgcm source code
600      (*.[fFhc] + Makefile) used for the build within the executable
601      - requested by CNH but off by default
602      - adds a paltry <9MB to the mitgcmuv executable in most cases
603      - only writes the output when useEMBEDSRC in eedata is true
604    o clean up 3-dim. relaxation codes:
605      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
606      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
607      * Thanks to Tom Haine for testing!
608    
609    checkpoint57z_post
610    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
611      affects output (@ truncation level) of exp. plume_on_slope ; updated.
612    o fix the pickup behavior for obcs in combination with ptracers
613    o fix a bug in ptracers_external_fields_load
614    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
615      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
616    o transfered surface NH pressure to eta field (if exactConserv).
617    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
618         and update lab_sea output.txt file.
619    o completing 3-dim. relaxation code: additional term
620         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
621      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
622      * At compile time, in "EXF_OPTIONS.h" set
623          #define  ALLOW_CLIMTEMP_RELAXATION
624          #define  ALLOW_CLIMSALT_RELAXATION
625      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
626          tauThetaClimRelax3Dim = 15552000.0,
627          tauSaltClimRelax3Dim  = 15552000.0,
628      * 3 cases:
629          1) Use a constant-in-time 3-dim. field
630          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
631          3) Real-time relax. to time-evolving prescribed field
632    o Adding Laplacian-type smoothness constraint on
633      initial and boundary (forcing) controls (ic, bc)
634      * enable at compile-time via
635        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
636      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
637      * Absolute scale somewhat unclear so far
638      * no area weighting was included since no other cost term does so far
639    
640    checkpoint57y_post
641    First step for a NLFS adjoint
642    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
643    o new init. routines for calc_r_star, calc_surf_dr
644    o still need to deal with ini_masks_etc
645    o testreport seemed happy
646    checkpoint57y_pre
647    
648    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
649    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
650    o add new offset feature to offline pkg (plus minor cleanup)
651    o cfc fixes for final year of integration
652    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
653      be in GCHEM_OPTIONS).
654    
655    checkpoint57x_post
656    o fix testreport Pb in multiple test experiment.
657    o cleanup our namelist syntax in verification:
658      - make it more F95 standards compliant (some work still needed)
659      - allows the vast majority of our tests to work with gfortran
660    o Non-Hydrostatic:
661     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
662     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
663    o Allow to apply AB on T,S rather than on AB(gT,gS):
664     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
665     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
666       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
667     - need a "clever" read_pickup to restart from the other AB formulation
668    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
669    o remove some unused variables (reduces number of compiler warnings)
670    o adjoint
671      * Disable useVariableViscosity for adjoint for time being
672        (there are a number of extensive recomputations)
673      * Initialize certain variables needed for adjoint
674    
675    checkpoint57w_post
676    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
677                 fix the singleCpuIO RS version of MDSWRITEFIELD
678       and add a WARNING if using globalFiles=T with multi-processors.
679    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
680      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
681    o tracer advection scheme:
682      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
683       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
684       was not very convenient).
685      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
686       (further tests needed for the implicit DST & Flux-Limiter schemes).
687    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
688      and sRef for convenience, handy, when you want to initialize
689      ptracers in a large domain with a constant non-zero value. Also,
690      untangle ptracers_init.F a little.
691    
692    checkpoint57v_post
693    o change dome exp. to use variable viscosity in side-drag terms.
694    o remove all the files from the cfc_offline test since they are now
695      incorporated into tutorial_cfc_offline which has been producing
696      identical results for a few days of testing
697    o add new parameter: sideDragFactor to enable half-slip-side BC
698      and change side-drag S/R to use viscosity from mom_calc_visc
699      (can switch back by setting sideDragFactor=0.); affects results at
700      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
701       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
702    o vorticity & strain are now computed without masking, to account for
703      no-slip-side BC in variable viscosity calculation ; mask is applied
704      anyway later on, before computing advection/coriolis terms.
705    o modify exp4 to test new obcs support for reading from external files
706      and for passive tracers
707    o fix behavior of ptracers_monitor when monitor output is written to a
708      netcdf-file; still not independent of monitor.F (writes in the same
709      file).
710    o change default value of tRef (put a uniform, meaningful value for ocean
711      & atmos) and initialize sRef (was missing, as Martin mentioned).
712    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
713      to be proportional to enstrophy dissipation length.  Thus,
714       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
715      This is now consistent with Smagorinsky and with the manual.
716    
717    checkpoint57u_post
718    o OBCS and PTRACERS: add open boundary support for passive tracers
719      - either use homogenous (pseudo) v.Neumann conditions or prescribe
720        OB-values from file; this is not different from the way theta and salinity
721        are treated
722      - however, Orlanski-radiation conditions are not supported, and the model
723        will stop if you use pTracers and Orlanski at the same time.
724      - beefed up the rountine obcs_external_fields_load: now only those open
725        boundary values are overwritten with values from files for which there
726        are really files, otherwise the OB-fields remain untouched. This makes
727        it possible to use different OBs at different ends of the domain (as
728        with EXF)
729    o reduce number of exch calls in shap_filt (s2).
730    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
731      truncation level) 4/5 MLAdjust test results (11&12 digits match).
732    
733    checkpoint57t_post
734    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
735    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
736      same truncation, independent of the face number: affects affects several
737      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
738    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
739      note that biharmonic viscosity + no-slip was not tested in any experiment.
740    o fix bug in non-linear free-surf side-drag ; generate new output for
741      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
742    o make mnc honor the writeBinaryPrec flag for most kinds of output
743    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
744    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
745      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
746    o add brackets in multi-terms sum to get same truncation, independent of
747      the face number (manage to get exactly same value of gU,gV at the cs-edge)
748      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
749    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
750      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
751      a maximum grid-scale Reynolds number.  Also, changes all length calculations
752      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
753      Suggested values of viscosity parameters found in mom_calc_visc.
754      Many new viscosity diagnostics available.
755    
756    checkpoint57s_post
757    o Add clearing-house for viscosity calculations, mom_calc_visc and
758      correct numerous bugs in LeithD and Smagorinsky discretizations.  
759      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
760      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
761      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
762      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
763      The Strain-Tension form is now called with useStrainTensonVisc=.true.
764      ViscAhStrain and viscAhTension are now retired.
765    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
766    o In response to JMC's bug report, genmake2 now ignores any soft-links
767      that it finds in the *current* directory when searching for files.
768      Soft-links found in any other source directories will still work as
769      they did before.
770    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
771      a C routine to unlimit the stack size
772    o mnc-ify pkg/aim snapshot vars
773    o mnc-ify pkg/land as requested by Daniel
774    o various changes to mnc including:
775      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
776      - output can now be grouped so that all files within a group
777          change the ITER portion of their names in lock-step together
778      - can now read ("global") PER-FACE (in addition to PER-TILE) files
779          and works with both EXCH1 and EXCH2 (but needs more testing)
780      - writing works for all verification test cases w/ g77 on Linux
781    
782    checkpoint57r_post
783    o make MNC variable initialization happen earlier
784    o add diagnostics for (almost) each term of the momentum Eq.
785    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
786    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
787    o remove MINIMAL_TAVE_OUTPUT option ;
788      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
789    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
790      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
791    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
792    o add time-dependent SST, SSS control
793    o cost terms in ecco/ modularized (new cost_generic.F)
794    o cost_averages routines are modularized (new cost_averagesgeneric.F)
795    o new infrastructure for seaice model vs. obs misfits in seaice/
796      * driver from the_main_loop.F is seaice_cost_driver.F
797      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
798      * gradient check in Exp. 6a of natl_box_adjoint/
799    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
800      (see README file)
801    
802    checkpoint57q_post
803    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
804    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
805      - bug was reported by Jean-Michel and Ian Fenty
806    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
807      update exp. cpl_aim+ocn output.
808    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
809      Needed for high-res. runs with large global files
810      to be able to limit tapelev size
811    o Changed some tests for adjoint:
812      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
813      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
814      * global_ocean.90x40x15/ back to default 3-level checkpointing
815    o Modifications to enable scripted COMMON to MODULE conversion
816      * verification/OpenAD/code/ has necessary scripts and description;
817      * converts, compiles and runs successfully;
818    
819    checkpoint57p_post
820    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
821    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
822      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
823    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
824    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
825      (was already the case for dissipation with mom_vecinv,
826       and also the case for grad.PhiHyd when staggered-timeStep)
827      This will allow to put dissipation out-off the AB time-stepping.
828     Unfortunately, affects truncation error. Update output of exp. that "fails"
829      (cg2d matching number) and leave the others for later: front_relax(10),
830      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
831      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
832    
833    checkpoint57o_post
834    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
835      (2) its ready to be documented during the 20050801 DocFest
836    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
837      for ideal_2D_oce and lab_sea on linux_ia32_g77
838    o set to #undef CTRL_SET_OLD_MAXCVARS_30
839      in global1x1_tot/code_seaice_adj to access indices 32, 33
840      (worth another tag)
841    
842    checkpoint57n_post
843    o adding precip control xx_precip 32
844    o adding swflux control xx_swflux 33
845    o Replacing 10 forcing penalty cost routines by 1 generic.
846    o Implementing partitioning in time-mean and variable adjustment
847      for atmos. state.
848    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
849    o in natl_box_adjoint:
850      * updated exp 1 to 10
851        (but does not have time-mean vs. variable split results yet)
852    o updated global1x1/*_seaice_adj/
853      to incorporate latest changes
854    o enable useSingleCpuIO for mdsio vector routines
855      (applies in particular to tapelev I/O)
856    o removed inefficient K-loop in all active_file*control*.F
857    
858    checkpoint57m_post
859    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
860      and advect_cs (use EXCH-2 and standard cs-32 grid files).
861    o pkg/exch2: filling of face-corner halo regions is optional
862      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
863    
864    checkpoint57l_post
865     tag before updating tutorials (pre-release-2)
866    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
867       for output and interpolation of input fields onto model grid)
868    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
869       Affects results of exp. rotating_tank ; update output.txt.
870    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
871          and taking the square quantity and/or using a fraction-weight field.
872    o fix aim_diagnostics_init.F mate numbers.
873    o add mnc output capability to diagnostics/diagstat and update
874      our cvsignore files for the ACSII output generated
875    
876    checkpoint57k_post
877    o lab_sea now uses diagnostics package and provides a suite of
878      new EXF diagnostics output.
879    
880    checkpoint57j_post
881    o exf
882      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
883        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
884        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
885      * extended diagnostics output
886        - now includes all EXF variables
887        - hs, hl moved to common block
888        - separate S/R for diagnostics, called after ctrl vector is added
889        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
890        - EXFqnet contains true Qnet (i.e. includes qsw)
891      * updated verif. lab_sea, global_with_exf
892      * Rearranging hflux (exf_mapfields -> exf_getforcing)
893        to ensure that diagnostics sees a true EXFqnet
894    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
895    o diagnostics pkg: change pointers so that 1 diagnostic can be used
896      several times with different frequencies.
897    o mnc-ify the thsice package as requested by Daniel Enderton
898      - the monitor--MNC output needs work
899      - many attributes need to be added (most are currently blank)
900    o mnc-ify theaim_v23 package as requested by Daniel Enderton
901      - many attributes need to be added (most are currently blank)
902    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
903    o add Sadourny like discretization to the 4th.O vorticity advection scheme
904    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
905      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
906         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
907    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
908     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
909    
910    checkpoint57i_post
911    o Diagnostics package was changed: diagnostic allocation is now deactivated
912      by setting an empty file name in the namelist (used to be by setting 0 frequency)
913    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
914      add 1rst Order upwind vertical Shear.
915    o add a quick fix for A/B checkpointing in OFFLINE mode
916    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
917      end-run around the C/Fortran linking horror in eesup/src/timers.F
918    o added pkg/runclock: allows user to terminate run based on wall clock
919    o added non-hydrostatic scaling parameter: nh_am2
920    o pkg/my82: futile attempt to make results compiler-independent by adding
921      some "_d 0", etc. no effect.
922    o for mnc output, fill the 'T' coordinate var with myTime and create a
923      separate 'iter' variable for iteration count
924    o pkg/diagnostics:
925      add new capability: output of Global/Regional & per-level statistics ;
926      tested against monitor output (including land & thSIce) on various exp.
927    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
928    
929    checkpoint57h_done
930      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
931      data.diagnostics, data.gchem, data.ptracers) is done.
932    
933    o pkg/diagnostics: prepare for Global/Regional statistics.
934      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
935    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
936      and rename it: DIFFERENT_MULTIPLE
937    
938    checkpoint57h_post
939    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
940    o pkg/diagnostics: change output frequency, now in seconds (instead
941      of Nb of iterations). This requires to change data.diagnostics.
942    checkpoint57h_pre
943    
944    o in mnc, let the user create the output dir if both mnc_outdir_date
945      and mnc_outdir_num are false
946    o add fflags() to pkg/diagnostics which allows one to specify, on a
947      per-file basis, the file precision [default behavior is unchanged]
948    o added diagnostics to pkg/kpp, including computation of mixed layer
949      depth based on a temperature/density criterion
950    o updated verification/natl_box to test the new pkg/kpp diagnostics
951    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
952    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
953    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
954      not mnc -- this mistake was found by JMC and is now corrected
955    
956    checkpoint57g_post
957    o add Adams-Bashforth 3rd Order time stepping:
958      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
959      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
960    checkpoint57g_pre
961    
962    o make lambda[Theta,Salt]ClimRelax spatially varying
963      (default remains spatially uniform constant based on tau)
964    o added new control variables
965      * init. uVel, vVel, etanN
966      * lambda[Theta,Salt]ClimRelax
967    o separate masks used for ctrl_pack/unpack 'from write_grid' output
968      (suggested by G. Forget)
969    
970    checkpoint57f_post
971    o add parameter "baseTime" = model base time = time at iteration zero
972      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
973      account for baseTime shift
974    o move Coriolis arrays from PARAMS.h to GRID.h
975    checkpoint57f_pre
976    
977    o mnc-ifying the seaice package
978    o introduced an alternative length scale calculation for use in the limiting
979      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
980    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
981    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
982      as well as grad(vort3).  Made it compatible with both approximate form
983      for the cubed sphere and full form of these gradients.  Added flag
984      useFullLeith to select between approximate and full form.  
985    o add "d0" in getcon.F to reduce differences between compilers/platforms
986      update output.txt of exp. fizhi-gridalt-hs
987    o change port_rand funtion to allow to set the seed.
988    o fix obscure MNC bug involving conversion between reals and integers
989      - it caused no problems with certain (eg. gcc, ifc) compilers but the
990        new version is now more standards-compliant
991    o adjoint-related modifications
992      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
993      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
994      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
995    
996    checkpoint57e_post
997    o Adding eddy stress controls a la Ferreira et al.
998    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
999    
1000    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1001      update output.txt of exp. fizhi-gridalt-hs
1002    o add more "Z" dimensions and associated coordinate vars to MNC
1003    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1004    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1005      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1006      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1007      months and years.  Requires pkg/cal.
1008    o diagnostics: add pickup functionality
1009      - off by default for backwards compatibility
1010      - current version only uses MDSIO -- MNC will be added
1011    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1012    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1013    
1014    checkpoint57d_post
1015    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1016    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1017      output from the diagnostics package
1018    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1019    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1020      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1021    o add coordinate variables to the MNC output from the diagnostics package
1022    o change MNC-flags default value: true when useMNC=TRUE
1023    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1024      the ability (off by default) to read the grid information using MNC
1025    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1026    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1027    o do snap-shot diagnostics at the middle of the time-interval (instead of
1028      at the end).
1029    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1030      new test for AIM with thSIce + slab-ocean
1031    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1032    o move state variable diagnostics to the beginning of the time step ;
1033      (note: still needs some work specially for snap-shot diagnostics)
1034      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1035    
1036    checkpoint57c_post
1037    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1038    o generate new output.txt files on faulks with g77 & the new -ieee option
1039    checkpoint57c_pre
1040    
1041    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1042      update output.txt of exp. global_ocean.90x40x15
1043    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1044      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1045    o add saltFlux(+File) forcing capability with periodicExternalForcing
1046    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1047    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1048    o improvements for the MNC output from DIAGNOSTICS:
1049      - correct handling of the unlimitied dimension
1050      - all dims now have associated coordinate variables
1051      - variables located at U, V, and Corner ("Z") points are now written
1052        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1053        *all* data points are output
1054    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1055    o added pkg/seaice/seaice_monitor.F
1056    o mdsio_readfield.F can now read files visible only to master MPI process.
1057    o pkg/seaice: some test code for ice-modified ocean stress
1058    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1059      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1060      spurious negative numbers for precipitation and humidity.  Will cause
1061      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1062    o pkg/ctrl/
1063      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1064        May be enabled via doPackDiag
1065      *  introduce z-scaling of
1066         + gradient (doZscalePack) and
1067         + control (doZscaleUnpack)
1068    o pkg/mdsio/
1069      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1070      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1071    
1072    checkpoint57b_post
1073    o simplify options in diagnostics_fill arguments (remove weird combinations)
1074    o fix MNC coordinate variables so that they now contain per-face index
1075      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1076      general, EXCH2 grids are only aligned to a "local" coordinate system
1077    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1078    o Implement instantaneous output within pkg diagnostics:
1079      setting a negative frequency in data.diagnostics produces
1080     "snap-shot" output (as opposed to time-average if freq > 0)
1081    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1082      NOTE: change ptracer diagnostics name: use 2 characters to work with
1083            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1084    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1085      becomes the coordinate variable for the 'T' dimension
1086    o add CF-style coordinate variables to MNC
1087      - just a first cut:  numbers are meaningless on the cubesphere and
1088        missing along the T axis but otherwise it works!
1089    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1090    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1091    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1092      this is based directly on what the model compute, so that the content of
1093      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1094    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1095    o clean up build options files for SunOS, in particular
1096      - remove -traditional from xmakedepend
1097      - change -xarch=v9 to -xarch=native for f77
1098      - restore use of make (not gmake)
1099      - add CC=gcc if using g77
1100    o changes per discussion of AM, JMC, & EH3 today:
1101      - move redundant "grid" variables out of "state" -- in preparation of
1102        creating proper CF-style coordinate variables and in recognition
1103        that any/all grid variables can be easily copied (eg. w/NCO) from
1104        the grid files into any of the other NetCDF files
1105      - *always* output grid variables with MDSIO (this will eventually be
1106        changed)
1107      - output MNC grid file if useMNC is true
1108    o every instance of _END_MASTER() has been found and replaced with
1109      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1110      preprocessors
1111    o re-arrange diagnostics pkg initialisation:
1112     - allow each package to extend the available diagnostics list
1113     - add some checking and fix small problems (multi-threaded, ...)
1114     - new S/R diagnostics_fill (replace fill_diagnostics):
1115       look through the short list of active diag. (instead of the long list)
1116       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1117    
1118    checkpoint57a_post
1119    o this set of changes restores TAMC compatibility
1120      tested for global_ocean.90x40x15 adjoint on trough
1121      (what a pain)
1122    
1123    checkpoint57a_pre
1124    o some modifs in tools/build_options for sunos
1125    o call ctrl_pack for ctrl at end for optimcycle=0
1126    
1127    checkpoint57
1128    o add horizontal bi-harmonic viscosity for vertical velocity
1129      - new parameter viscA4W (defaults to viscA4)
1130      - affects only non-hydrostatic code
1131      - to be done: no-slip lateral boundary conditions
1132    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1133    o implement Implicit Vertical advection for pTracers
1134    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1135      (implemented also for implicit vertical diffusion & advection)
1136    o OBCS: extend application of tracer open boundary conditions
1137      to a strip beyond the boundary of width Olx/Oly
1138    o add call monitor to TAF set of required calls (flow directives)
1139      and include in natl_box_adjoint
1140    o untangle a few ifdefs related to cost, ctrl, autodiff
1141      untangel a few ALLOW_ECCO_OPTIMIZATION
1142    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1143      (theta2, salt2 in ecco_cost_weights)
1144    
1145    checkpoint56c_post
1146    o OBCS as control variables
1147      - update ctrl_ad_diff.list, obcs_ad_diff.list
1148      - remove balance of obcs controls from default
1149      - fix index bug nobcs in ctrl_init
1150      - fix dummy fields filen in ctrl_pack
1151      - add dummy weights for obcs
1152    o lsopt: comment out fort.94 output
1153    o optim:
1154      - remove unnecessary header files
1155      - adjusted namelists
1156      - add xerbla.F to Makefile
1157    o exf:
1158      - multiple modifications of exf_check_range
1159      - unit change in exf_init_runoff from [m/year] to [m/s]
1160    o mdsio:
1161      - i/o-vector change debugLevel from debLevA to debLevB
1162    
1163    checkpoint56b_post
1164    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1165      is called from DO_THE_MODEL_IO
1166      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1167      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1168      - clean up PTRACERS_WRITE_TIMEAVE a little
1169    o add another verification experiment that tests both the cfc-pkg and
1170      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1171      reactive tendencies treated inline with regular timestepping
1172    o testreport previously did a lousy job of comparing small numbers, so
1173      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1174      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1175      testreport.
1176    o ptracers_monitor: bug fix for MPI
1177    
1178    checkpoint56a_post
1179    o GCHEM: finish reorganizating the package
1180      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1181        (introduces another 3D-array for each passive tracer, but only if
1182        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1183        gchemTendency is not needed because the timestep is done separately)
1184      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1185      - GCHEM is now---more or less cleanly---separate from PTRACERS
1186      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1187        so clear to me how that should be done in a general way.
1188    o CFC: improve formatting of output in CFC_ATMOS
1189    o PTRACERS:
1190      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1191        that ALL experiments with ptracers enable can be checked. This makes
1192        GCHEM_MONITOR obsolete.
1193      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1194        monitorFreq
1195      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1196    o add PTRACERS (PTR0[1-5]) to testreport output
1197    o exf_check_range:
1198      * default changed to .TRUE.
1199      * will check values for niter0 if debLevA, every timestep if debLevB
1200      * STOP in exf_check_range if 'out of range'
1201      * range chosen generous to allow for potential extema
1202      TBD: a version with stricter range
1203           permitted range would be runtime parameters
1204    o GMredi:
1205      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1206      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1207      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1208    o GCHEM:
1209      - move call to GCHEM_FORCING_SEP, so that it is now called before
1210        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1211      - introduced a useGCHEM runtime flag and applied it everywhere.
1212      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1213        this flag is now only visible within GCHEM-pkg routines.
1214      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1215        be replaced by a 3D array that is computed before thermodynamics; for
1216        this, the tracer ID iTracer had to be included into the parameter list
1217        of ptracers_forcing
1218      - set up forward_step to call gchem_forcing, that will replace
1219        gchem_forcing_int in ptracers_forcing
1220      - cleaning up
1221    o small cleaning of exch2: remove files that are also in eesupp/src
1222    
1223    checkpoint56
1224    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1225    o mnc: cleanup "full" files--fixes out-of-memory problem
1226    o ECCO-GODAE
1227      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1228      * fully merged and updated from SIO code
1229        windstress sign change affects
1230        - exf_inscal_[u/v]stress
1231        - sign of xx_tau[u/v] adjustments
1232        - signs in cost_scat
1233      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1234      * natl_box_adjoint updated and compressed
1235      * 2-level checkpoint switch added
1236        (tested in EXP. 1 of natl_box_adjoint)
1237      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1238    o SVD
1239      * first complete, non-hacked version for SVD calculations
1240      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1241        performed via direct access files admtlm_vector.it????
1242        (via ctrl_[un]pack)
1243      * optimcycle is used for ARPACK iteration counter
1244        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1245      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1246        and add linear transforms where necessary
1247      * controls are initial/final SST, SSS (can be extended; need to check
1248        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1249    o mdsio: filename info to both stderr, stdout
1250    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1251      from sign change
1252    
1253    checkpoint55j_post
1254    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1255      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1256    o add consistent build directories and .cvsignore files to verification
1257    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1258    o make all subroutines 30 or less characters in length for certain older
1259      compilers to work (a thorough search only turns up two routines in
1260      pkg/ptracers)
1261    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1262      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1263    
1264    checkpoint55i_post
1265    o change arrays for total vertical diffusivity (2.D if explicit,
1266      3.D if implicit) ; each ptracer uses its own background value.
1267    o added mnc/NetCDF output capability to ocn_compon_interf
1268      - added bits to verification/cpl_aim+ocn so that it can run on
1269        ITRDA and other clusters without the mpirun "-wd" option
1270    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1271      configuration
1272    o give MNC the ability to create additional files rather than
1273      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1274      - the default is just less than 2GB which is a practical limit
1275        on many systems
1276    o Compute the non-local term using either KPP vertical diffusivity (=default)
1277       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1278    
1279    checkpoint55h_post
1280    o add verification test "vermix"
1281    o remove all the *_ioinc flags and replace with the single global
1282      outputTypesInclusive flag
1283    o allow to set a vertical profile of vertical diffusivity for T & S
1284    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1285    o useMNC moved from data.mnc to data.pkg
1286    
1287    checkpoint55g_post
1288    o Renaming carbon AD experiments to comply with testreport conventions
1289    o Updating adjoint of Held-Suarez hs94.1x64x5
1290    o Fixing directives for non-ECCO forward_step, after ECCO directives
1291      have been fixed to avoid recomp. of do_oceanic_phys
1292      Works well for global_ocean.90x40x15,
1293      but recomp. issue remains for carbon
1294    o Updating adjoint output for natl_box_adjoint after
1295      pkg/ecco has been modified (see taga c55d_post)
1296    
1297    checkpoint55f_post
1298    o rename to timeave_init_fixed
1299    
1300    checkpoint55e_post
1301    o some delicate re-shuffle of store directives to avoid one
1302      extra call of do_oceanic_physics
1303      affects ecco_the_main_loop.F, do_oceanic_physics.F
1304      checkpoint_lev1_directives.h
1305    o NB: this may break global_ocean adjoint temporarily,
1306      but it is clear how to fix it. Will do later, need this now.
1307    
1308    checkpoint55d_post
1309    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1310    o ecco_cost_weights is modified to 1x1 runs
1311    o modifs to allow observations to be read in as
1312      single file or yearly files
1313    o enable to read exf forcing fields as either
1314      single file or yearly files (flag useExfYearlyFields)
1315    checkpoint55d_pre
1316    
1317    o switch between 2-level and 3-level checkpointing
1318    o add ability of MNC to write local and "partial" (eg. 2D slices where
1319      the full 3D field is never actually stored) arrays to NetCDF files
1320      with the correct (that is, the complete multi-dimensional) set of
1321      array indicies
1322      - used in mom_vecinv() to write the diagFreq output
1323      - tested (demonstrated) in verification/aim.5l_cs
1324    o further mnc-ification
1325      - add verification/lab_sea to the list with mnc setups
1326      - fix undefined mnc v-names in cd_code
1327      - add kpp to mnc output (both snapshot and timeave)
1328    o non-hydrostatic code
1329      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1330        in calc_gw.F
1331      - defaults to viscAh
1332      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1333        friction or Leith) in non-hydrostatic mode, as long as there is
1334        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1335    o pkg/cost
1336      extend simple cost functions to treat time mean quantities
1337      (T,U,V) via cost_accumulate_state from cost_tile
1338    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1339        be 2 times larger than the minimum size the advection scheme requires.
1340        now get a perfect conservation of salt in advect_cs test-exp (updated)
1341    o GGL90 (Gaspar's TKE mixed layer)
1342      - add horizontal diffusion of TKE, requires exchanges in
1343        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1344        default. In OPA there is no horizontal diffusion of TKE but the
1345        mixing coefficients are computed from a horizontal average of TKE of
1346        6 points or so. I think that diffusion has a little more physical
1347        justification.
1348      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1349        was in vain)
1350      - mask tke-variable in ggl90_init
1351    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1352    o fix biharmonic diffusion on CS-grid.
1353    o more obcs stuff
1354      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1355        for reading boundary values. This routine is called from
1356        obcs_prescribe_read
1357      - updated obcs_check
1358      - changed sponge layer relaxation parameter units for days to seconds
1359      - turned off sponge layer by default
1360      - changed argument list of OBCS_CALC to myTime+deltaTclock
1361      - fixed about 35 bugs in obcs_external_fields_load
1362    
1363    checkpoint55c_post
1364    o obcs stuff
1365      - new runtime flags useOBCSprescribe, useOBCSbalance
1366      - re-arranged obcs_calc
1367      - moved exf_getobcs to obcs_prescibe_read
1368        obcs_prescibe_read is called after ORLANSKI stuff
1369        and independent of it (executable can contain all).
1370      - updated obcs_check
1371      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1372        These may be necessary only if tangential velocities are
1373        prescribed at OB, not sure, needs testing.
1374    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1375      which simplifies the calls and passes the ifc check-bounds test
1376    
1377    checkpoint55b_post
1378    o add a 2D scalar, Z location, exchange_2 routine.
1379    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1380      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1381      affects advect_cs results (for the wrong reason): update output.txt
1382    o use a more standard discretization for biharmonic viscosity ;
1383     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1384      affects results of dome set-up: update output.txt
1385    o fix gad_advection.F (CubedSphere part), back to version 1.23
1386    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1387    
1388    checkpoint55a_post
1389    o merged code to
1390      * prescribe/read time-dependent open boundaries
1391        (works in conjunction with exf, cal)
1392      * sponge layer code for open boundaries
1393      * each boundary N/S/E/W now has its own CPP option
1394        (healthy for the adjoint)
1395    
1396    checkpoint55
1397    o up-to-date adjoint of previous breaks
1398      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1399      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1400      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1401      - carbon: * remove tr1-related adjoint verification
1402                * add ptracer as control variable
1403    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1404      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1405    
1406    checkpoint54f_post
1407    o in verification/carbin/ remove experiment related to
1408      ALLOW_PASSIVE_TRACER (array tr1 etc)
1409      code_ad/ input_ad/ results_ad
1410    
1411    o add two new packages
1412      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1413        + subject to optimization (memory)
1414      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1415        + subject to reordering (many GOTOs in the original code)
1416        + so far opps is called for every (i,j) point, and then operates in
1417          the vertical; one may want to reorder the scheme in order operate in
1418          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1419          fields)
1420    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1421      - all verification tests compile and run with linux_ia32_g77
1422      - defaults are compatible with current input files--nothing
1423        should change if you were not previously using MNC
1424      - MNC output has been added in numerous places (eg. timeave)
1425        but there are still a few writes not yet do-able with MNC
1426        (this is in progress)
1427      - flags now allow for either/or/both use of MDSIO and MNC and
1428        documentation will soon follow
1429      - numerous small formatting cleanups for ProTeX
1430    o add version info (via BUILD_INFO.h) to MNC and stdout
1431    
1432    checkpoint54e_post
1433    o add two new packages
1434      - pp81 (Packanowski and Philander, 1981), Richardson number and
1435        stratification dependent mixing
1436      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1437      - these scheme operate in a similar manner as KPP (without ghat, of
1438        course), however there is only one diffusivity that is used for both
1439        temperature and salinity (and passive tracers)ç
1440    o add offline package
1441    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1442      provided by Stephanie Dutkiewicz
1443    o genmake2: add ability to search for C compilers and cleanup test output
1444      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1445    
1446    checkpoint54d_post
1447    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1448    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1449      leading to additional shift by 5 days each year of integration
1450       (i.e. leading to considerable offset over the years)
1451    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1452    o start with no AB and no initial filtering (staggerTimeStep):
1453      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1454    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1455      (external loading & cpl import/export stay in forward_step.F)
1456    o update coupling interface to work with new staggerTimeStep
1457    o change MDSIO ptracers_pickup.
1458    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1459    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1460    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1461    
1462    checkpoint54c_post
1463    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1464      this affects (truncation error) output.txt of test-exp:
1465       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1466    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1467    o change Qnet to always be the net heat flux, (+upward).
1468      affects (truncation error) output of natl_box exp.: updated
1469    o define the max number of passive tracers in PTRACERS_SIZE.h
1470    o start to test mnc routinely in exp0
1471    o add sea-ice loading (sIceLoad) as a new forcing field.
1472    
1473    checkpoint54b_post
1474    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1475       impressive on Altix and Opteron systems)
1476    o diagnostics can now write NetCDF files through the mnc package
1477    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1478    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1479    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1480      affects (truncation error) output of lab_sea & natl_box exp.: updated
1481    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1482    
1483    checkpoint54a_post
1484    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1485    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1486    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1487    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1488      + internal_wave (shift in writing cg2d_ini_res)
1489    checkpoint54a_pre
1490    
1491    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1492      - modified verification/lab_sea and natl_box_adjoint accordingly
1493    
1494    checkpoint54
1495    checkpoint53g_post
1496    o prepare splitting of thermodynamics: store convect.counter in common block
1497    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1498      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1499    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1500    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1501    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1502    o restore adjointability
1503    
1504    checkpoint53f_post
1505    o modifications that affect AIM experiment results (update output.txt):
1506      - no advection of S at top interface Nr (pkg/generic_advdiff)
1507      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1508    o AIM pkg:
1509      - include stability function into surf.Flux derivative relative to Tsurf
1510      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1511    
1512    checkpoint53e_post
1513    o merged cylindrical coord configuration
1514    o added rotating_tank experiment
1515    checkpoint53e_pre
1516    
1517    checkpoint53d_post
1518    o faulks upgraded: re-generate output.txt that have changed:
1519       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1520    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1521    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1522    o added Sadourny discretization of Coriolis
1523      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1524      - re-enabled use of omega3 (useAbsVorticity)
1525    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1526      vector-invariant equations
1527      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1528    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1529      hopefully without new bugs
1530      - still to do: biharmonic friction for non-hydrostatic w
1531    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1532    o regenerated output for global_ocean_ebm (using -ieee)
1533    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1534      of mom_common/
1535      - simple re-arrangement of instructions within computing loop
1536    checkpoint53d_pre
1537    
1538    checkpoint53c_post
1539    o new version of coupler for AIM+thSIce and Ocean models
1540     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1541     - land: change Evaporation of snow
1542     - aim with thSIce: fix bug in snow-precip.
1543    o changes to calc_gw.F
1544     - bug fix for w^2 term near the bottom boundary
1545     - (hopefully) improve the lateral slip boundary condtions for use with
1546        partial/looped cells
1547      - because the bug fix changes two verification experiments anyway (exp5
1548        and plume on slope), change the lateral boundary condition from half slip
1549        to the value of no_slip_sides
1550    o ebm package wasnt quite up to the parallel task. Fixed that.
1551    o Adjoint of EBM package + verification
1552      * TLM OK
1553      * ADM not sufficient accuracy yet (needs further testing)
1554    
1555    checkpoint53b_post
1556    o Commiting new energy balance model to repository
1557      * package is pkg/ebm
1558      * verif. is verification/global_ocean_ebm
1559      * references are in ebm_driver.F
1560    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1561    C        Global thermohaline circulation. Part I:
1562    C        Sensitivity to atmospheric moisture transport.
1563    C        J. Climate 12(1), 71-82
1564    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1565    C        Global thermohaline circulation. Part II:
1566    C        Sensitivity with interactive transport.
1567    C        J. Climate 12(1), 83-91
1568    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1569    C        Destabilization of the thermohaline circulation
1570    C        by atmospheric eddy transports.
1571    C        J. Climate 7(12), 1870-1882
1572    o Will need long integration testing.
1573    checkpoint53b_pre
1574    
1575    o created pkg/mom_common in preparation for variable viscosity code
1576    o renamed and split ini_mnc_io
1577    o pkg/land: only liquid water can diffuse or run-off
1578    o AIM using land: soil wetness availability account for snow
1579    o added printMapIncludesZeros to EEPARMS namelist
1580    
1581    checkpoint53a_post
1582    o restore TAMC compatiility for exf_constants.h
1583      (no usage of _d in .h)
1584    o Additional storing in KPP in an attempt to fix
1585      TAMC problem with adjoint of KPP code.
1586      (no success...)
1587      Identical code works fine with TAF.
1588    o Fixed verification/natl_box_adjoint experiments.
1589      Initial conditions for Experiments 4 and 5 are now
1590      set to "SEAICE_initialHEFF=0", which is more reasonable,
1591      and hence gives results closer to that of Experiment 2.
1592      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1593    
1594    checkpoint53
1595    o stable checkpoint with up to date adjoint
1596      TLM tests only run for 1st grdchk at the moment. Its unclear if
1597      this is a code problem or a problem with resetting code for g_
1598      variables that is being autogenerated wrong.
1599      Otherwise:
1600       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1601       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1602         are both still in chaos following their security messes.
1603    
1604    checkpoint52n_post
1605    o various build (mostly genmake2) changes including:
1606      - ability to build/run more easily within Cygwin and MacOS X
1607      - more complicated Makefiles with a stronger dependence on Gnu Make
1608    o pkg/seaice modifications
1609      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1610        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1611        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1612      - changed proxy for geostrophic velocity and updated
1613        verification/lab_sea/results/* accordingly
1614      - removed ADI dynamic solver from pkg/seaice
1615      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1616        they caused a segmentation fault under certain circumstances
1617      - removed unused field WATR
1618    o bug fix in exf-package:
1619      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1620         now reflect that.
1621    o small fixes in the cal-package:
1622      - set reference date to first of January for the 'model'-calendar
1623      - failing of cal_CheckDate in cal_FullDate now actually results in a
1624        warning
1625    o small modifications in exf-package to increase flexibility:
1626      - change climtempfreeze from a constant to a runtime parameter that
1627        is specified in data.exf_clim (default = -1.9)
1628      - introduce runtime parameter windstressmax (default = 2.0) that is
1629        specified in data.exf
1630    o fix in pkg/thsice:
1631      - update Evap (Tsf changes) to be consistent with Latent heat flux
1632      - maintain snow precipitation unchanged (even if Tsf >=0).
1633     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1634    
1635    checkpoint52m_post
1636    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1637      this does not change any of the results, because myIter=0 in swfrac always
1638      lead to jwtype=2 (the default anyway), but the call makes little sense
1639      as a default
1640    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1641    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1642      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1643    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1644    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1645    o extending useSingleCpuIO option to work with new exch2 I/O format
1646      - old-style, missing-tile I/O is still accessible by defining CPP
1647        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1648    o monitor package can write to NetCDF files and/or STDOUT
1649    o fix re-definition bug in MNC_GRID_INIT_ALL()
1650    o doc/api_reference added
1651      - a framework for building an API Reference Manual using all
1652        the "protex" comments embedded in the code
1653      - see pkg/generic_advdiff, pkg/mnc for examples
1654    o MNC:
1655      - make myThid the last argument for all subroutines
1656      - new default for the grid files: NO halos
1657      - add useMNC and other run-time flags
1658      - separate per-file-group handling of the unlimited dimension
1659      - early initialization of MNC w/ flags read at the eeboot stage
1660        and lookup tables set in initialize_fixed
1661      - write all MNC output to a freshly-created directory
1662    o thermodynamics sea-ice (thsice) is now tested with testreport.
1663    o test exp. advect_cs: use the standard cs32 grid ; update output.
1664    o Added functionality to grdchk:
1665      pick global i,j,k position (or nearest wet) where to perform check.
1666    
1667    checkpoint52l_post
1668    o new land formulation:
1669      a) use ground enthalpy as prognostic variable to ensure exact
1670         energy conservation.
1671      b) account for water temperature and for latent heat of freezing
1672         in all processes (rain, run-off, ground storage)
1673      c) compute surface and ground temperature implicitly.
1674    o aim_v23 modification for new land model:
1675      a) Treat separately land / ocean / sea-ice surface fluxes
1676         to allow implicit computation of land & sea-ice surface temp.
1677      b) add snow precipitation.
1678    checkpoint52l_pre
1679    
1680    o fix problem (when 1 tile is empty) in min/max monitor.
1681    o fix bug in timeAve (u,vZetatave in common block)
1682    o no restoring terms under ice for pkg/seaice
1683    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1684    o bug fix for pkg/seaice pickups
1685    o change MNC call locations and add coordinate attributes
1686    o mask vorticity at the corner ; affects global_ocean.cs output
1687    o fix ini_curvilinear_grid ; test CS experiments with mpi
1688    o aim.5l_cs: modify sea-ice fraction input file ; update output
1689    o exf: Adding simple range check routine for exf fields after read
1690    
1691    checkpoint52k_post
1692    o removed top-level directory "diags"
1693      - we migrated these functions to pkg/timeave a long time ago
1694    o fixed bug introduced in pkg/monitor
1695    o accuracy ctrlprec = 32 insuffient for gradient checks using
1696      averaged fields (I/O via cost_averages)
1697      -> use ctrl.h in active_file*.F to control I/O precision.
1698    o paramter list of CALL ADTHE_MAIN_LOOP
1699    o added initial do_the_model_io to ecco
1700    o set all ...Freq to zero after cost_final
1701      taveFreq, dumpFreq, pChkptFreq
1702    o MAIN and ECCO differentiability restored
1703    
1704    checkpoint52j_post
1705    o fix nchklev in tamc.h for global_ocean...
1706    o Bringing flow and store directives up-to-date
1707    o Really weird thing!
1708      call do_the_model_io from the_main_loop with parameters
1709      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1710      TAF places a faulty re-call of initialise_varia
1711      after cost_final call which should not be there!
1712    checkpoint52j_pre
1713    
1714    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1715      error messages
1716    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1717    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1718      debug output
1719    o modfied mdsio_writefield.F to handle non-global files under exch2
1720    o update AIM Cubed-Sphere exp (aim.5l_cs):
1721      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1722    o update AIM Equatorial Channel exp:
1723      use standard aim_v23 pkg and change the SST fields to be more realistic.
1724    o globalFile now works with exch2
1725    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1726      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1727    o limit timeave output for hi-res integrations
1728    
1729    checkpoint52i_post
1730    o removed CPP_EEOPTIONS.h from verification/*/code
1731    o updated the tiling for global_ocean_pressure
1732    checkpoint52i_pre
1733    
1734    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1735      the old pkg/aim).
1736    
1737    checkpoint52h_pre
1738    o shortened offending lines in exch2_send_rx?.template
1739    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1740    o genmake2: add build & execute test for NetCDF code
1741    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1742      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1743    o added useSingleCPUIO flag to monitor.F and mon_out.F
1744    o added temporary hack for sea-ice dynamics on the cube:
1745      metric terms are ignored and it is assumed that
1746      there is no sea-ice on cube faces 1, 2, 4, and 5.
1747    
1748    checkpoint52f_post
1749    o added exch2 cube routines to pkg/exch2
1750    o modified hs94.cs-32x32x5 to use it
1751    o added new grid files to hs94.cs-32x32x5
1752    checkpoint52f_pre
1753    
1754    checkpoint52e_post
1755    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1756      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1757    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1758      to work with implicit vertical advection and AB ;
1759    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1760    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1761     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1762    checkpoint52e_pre
1763    
1764    o fix bug in impldiff when Nr=1 or Nr=2.
1765    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1766    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1767    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1768      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1769    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1770    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1771    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1772    
1773    checkpoint52d_post
1774    o re-tiled many expts to allow comparison in multi-processor mode
1775      - updated output accordingly
1776      - changed hs94.128x64x5 to use intial T from file rather than use the
1777        random number generator
1778    o add infrastructure in model routines for fizhi and gridalt packages
1779    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1780    o changes to permit hi-res, cubed-sphere, configuration
1781      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1782      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1783      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1784        of surface winds for the cube
1785      (A verification experiment, based on global_ocean.cs32x15, but with
1786       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1787       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1788       complete with example surface forcing files and matlab scripts to look
1789       at the output and compare it with that of global_ocean.cs32x15.)
1790    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1791       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1792       to conform to the common rule.
1793    o check-in the first version of the coupler + interfaces for multi-components
1794       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1795       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1796       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1797       - ocean and atmos. share the same horizontal grid (no interpolation).
1798       - exchanges between component and coupler is done in forward_step
1799    o new verification experiment, cpl_aim+ocn:
1800       coupled ocean - AIM atmosphere on cs32 grid.
1801    
1802    checkpoint52d_pre
1803    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1804    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1805    
1806    checkpoint52c_post
1807    o Fixing OPTIONS files for use of exf:
1808      - ALLOW_ECCO not needed
1809      - ECCO_CPPOPTIONS.h should not be included from
1810        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1811        as has been the case in the past
1812      - All cal/exf related options are currently set in
1813        single header file. Should remain so until we
1814        agree on a consistent new policy.
1815    o Removed all CPP options for cal package.
1816      cal has no more CPP options.
1817    o modified STOREs in GAD_ADVECTION
1818    o corrected key comp. for passkey
1819    
1820    checkpoint52b_post
1821    o new version: "thsice" of thermodynamic sea-ice pkg:
1822     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1823     - modify fluxes but do not change theta directly;
1824     - light cleaning of bulk_force pkg (still needed with thsice).
1825     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1826       + output_thsice.txt to test thsice & bulk_force pkgs.
1827    o put back grid & coriolis monitor output.
1828    checkpoint52b_pre
1829    
1830    o call "do_the_model_io" at the beginning (=> dump initial state)
1831    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1832    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1833      (need info on NUMBER_OF_PTRACERS)
1834    o missing PTRACERS headers in some routines
1835    o default tamc.h in pkg/autodiff supposed to crash
1836      to ensure proper customization
1837    
1838    checkpoint52a_post
1839    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1840      - moved surfaceTendencyTice from pkg/seaice to main code
1841      - subroutine FREEZE_SURFACE now limits only surface temperature
1842        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1843        => new output.txt for global_ocean.cs32x15 & global_with_exf
1844      - keep the old version of FREEZE for backward compatibility;
1845        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1846      - corresponding modifs for TAF directives
1847    o added surface flux output variables to TIMEAVE_STATVARS
1848    o time-averaged output for pkg/ptracers
1849    o fix problem with ECCO-related divided adjoint
1850      snapshot file was missing some ad-variables,
1851      but no warning issued by TAF
1852    
1853    checkpoint52a_pre
1854    o some bug fixes for #undef REAL4_IS_SLOW
1855    
1856    checkpoint52 = ecco_c52_e35
1857    o after testing adjoints of checkpoint51u_post
1858    
1859    checkpoint51u_post
1860    o this is the post-merge tag of the ecco-branch
1861      (needs another clean checkout and re-testing)
1862    o various natl_box_adjoint configs and results
1863      but no input fields
1864    o obcs adjoint not yet merged!
1865    o adding ECCO global 1x1 and 2x2 degree configs
1866    o updated/extended some store directives for seaice
1867    o pkg/ecco now containes ecco-specific part of cost function
1868    o top level routines the_main_loop, forward_step
1869      supersede those in model/src/
1870      previous input data.cost now in data.ecco
1871      (new namelist ecco_cost_nml)
1872    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1873    
1874    checkpoint51t_post
1875    o this is the pre-merge tag of the ecco-branch
1876    
1877    checkpoint51s_post
1878    o cleanup: removed various obsolete #define-s
1879    o pkg/grdchk
1880      - renamed 'ph-grd 3' to 'grad-res'
1881      - merged from ecco-branch
1882        (remaining bug fixes for obcs gradient checks)
1883      - additional high-precision output for testreport
1884        (grep for 'precision_grdchk_result')
1885    
1886    checkpoint51r_post
1887    o cleaned up or removed CPP_OPTIONS.h files
1888    o updated results for some of the tests to reflect the new
1889      optfiles (-ieee: -O0 instead of -O3)
1890    
1891    checkpoint51q_post
1892    o cd_code:
1893      - moved cd_scheme.F -> cd_code_scheme.F
1894      - separate read_checkpoint from cd_code_ini_vars.F
1895      - separated cd_code part from write_checkpoint
1896      - updated AD_SOURCE, generated .flow
1897      - added CD_CODE_VARS.h to the_main_loop
1898      - Moving cd_code specific store dir.s to pkg/cd_code
1899    o ctrl package totally restructured
1900      - pack/unpack now optional and decoupled from
1901        xx_/adxx_ I/O
1902      - ctrl_pack/unpack cleaned
1903        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1904      - confined inclusion of AD_CONFIG.h to where necessary.
1905    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1906    
1907    checkpoint51p_post
1908    o create initial cd_code package
1909      - WARNING: the initialization of fields within packages
1910        is broken because INI_FIELDS (where READ_CHECKPOINT is
1911        called) is called *before* PACKAGES_INIT_VARIABLES.
1912        This seems to be backwards since
1913        1) its important to initially zero the entire field including
1914           the "halo" region
1915        2) zeroing needs to be done *before* reading pickup info
1916           and the pickup call might or might not happen in any
1917           particular run
1918      - this needs an overhaul for R2
1919    o cleanup verification/*/code/GMREDI_OPTIONS.h
1920    o cleanup testreport
1921    
1922    checkpoint51o_post
1923    o bringing AD-related verif's up to date with genmake2
1924      - carbon/
1925      - global_ocean.90x40x15/
1926      - hs.94.1x64x5/
1927      - (front_relax/ )
1928    o (more) consistent directory structure for AD-related verif.'s
1929    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1930    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1931    o bug fix in find_alpha.F for MDJWF:
1932      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1933        change rho -> rho-rhoConst
1934      - replace call find_rho to find_rhonum
1935    o initialisation of rFlx extended to full array (required by TAF)
1936      and shifted to thermodynamics
1937    o removed PTRACERS.h in ptracers routine
1938    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1939    o Correcting initialisations for fVerU, fVerV.
1940    o helping TAF to recognize dependency on kUp for
1941      fVerU, fVerV
1942    o Replacing delZ by delR in pkg/ctrl/
1943    checkpoint51o_pre
1944    
1945    o undid all of cp51 pending some cleanups and discussion
1946    o added the [#include "AD_CONFIG.h"] statement to all files that need
1947       it for adjoint/tl #defines
1948     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1949     o removed tools/genmake since it no longer works
1950    
1951    checkpoint51n_post
1952    o modifications to make FREEZE flux visible to pkg/kpp
1953      - moved surfaceTendencyTice from pkg/seaice to main code
1954      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1955      - subroutine FREEZE now limits only surface temperature
1956        (this means new output.txt for global_ocean.90x40x15,
1957         global_ocean.cs32x15, and global_with_exf)
1958    o added surface flux output variables to TIMEAVE_STATVARS
1959    
1960    checkpoint51n_pre
1961    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1962    o added [#include "AD_CONFIG.h"] to all files that use the following
1963      defines:
1964      - ALLOW_ADJOINT_RUN
1965      - ALLOW_TANGENTLINEAR_RUN
1966      - ALLOW_ECCO_OPTIMIZATION
1967    
1968    checkpoint51m_post
1969    o incorporating changes to get TAMC/TAF working in genmake2
1970      - added new TAMC/TAF targets to the Makefile
1971      - various cleanups related to package handling
1972      - these changes should have no impact on the forward model
1973    
1974    checkpoint51l_post
1975    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1976     - faster algorithm for cal_addtime.F
1977     - higher precision arithmetic, where needed
1978     - pkg/exf *startdate variables changed from calendar date to
1979       model integration time
1980    
1981    checkpoint51l_pre
1982    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1983    o enable to apply restoring on S & T only in a latitude band.
1984    o update output (external_forcing_surf modif. change truncation errors)
1985       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1986    
1987    checkpoint51k_post
1988    o change default to: useNHMTerms=.FALSE.
1989     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1990       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1991     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1992        exp1, ideal_2D_oce
1993     - change data file of oceanic exp (leave the results unchanged for now)
1994       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1995    o set gravitySign automatically according to the vertical coordinate used
1996      (and change sign: back to "logical" value: +1 when R increases downward)
1997    o added an include barrier to the default CPP_OPTIONS.h and
1998      removed the #include "PACKAGES_CONFIG.h" from it
1999    o fix a bug in mom_fluxform (from chk51j_post)
2000    
2001    checkpoint51j_post
2002    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2003    o adjusted some flow directives (dynamics, thermodynamics)
2004    o added cubed-sphere case to test cost function
2005    o heckpoint_lev?_directives.h now include
2006      pkg-specific directives, whenever those are enabled.
2007    o Moving pkg-specific flow directives to corresponding pkg
2008      Moving pkg-specific differentiation list to corresponding pkg
2009      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2010      ---> conventions are
2011           - pkg_ad.flow
2012           - pkg_ad_diff.list
2013           - pkg_ad_check_lev?_dir.h
2014    
2015    checkpoint51i_post
2016    o merge of the branch-genmake2
2017      - knowingly breaks the older genmake
2018      - automatic generation of all ALLOW_${PKG_NAME} defines
2019      - new testreport supersedes older testscript
2020    o large number of package inclusion and header cleanups
2021    checkpoint51i_pre
2022    
2023    o new output for adjoin of global ocean vector invariant
2024    o fix for checkpoint of thermodynamic seaice and bulk_force
2025    o Steph gchem various cleanups
2026    
2027    checkpoint 51h_pre
2028    o fixed some single quotes
2029    o modify gchem pkg to be more versatile
2030    o modifications to clean up dic pkg
2031    o add pkg/cfc
2032    
2033    checkpoint51g_post
2034    o provide links for ARPACK and ADM*TLM
2035    o start removing verification/vero/
2036    o update AD-related stuff
2037      (in particular some IF-statements in model/src/ routines)
2038    o adding to verification/global_ocean.90x40x15/ adjoint of
2039      vector invariant setup
2040    
2041    checkpoint51f_post
2042    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2043    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2044      of tracer Green's fucntions for ocean inversion project.
2045    
2046    checkpoint51f_pre
2047    o Added on-the-fly spatial interpolation capability
2048        "USE_EXF_INTERPOLATION" to pkg/exf.
2049      - This is a temporary Cartesian-grid hack until
2050        the super-duper ESMF coupler becomes available.
2051      - See verification/global_with_exf/README for usage example.
2052      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2053        flags and modified pkg/seaice accordingly.
2054    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2055        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2056        non-local transport term.
2057    
2058    checkpoint51e_post
2059    o pkg/mom_vecinv:
2060      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2061      - add time-ave diagnostic of vorticity advection.
2062    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2063    o atmospheric geopotential: - include water vapor effect;
2064                                - use p^kappa in p* scaling.
2065    o land pkg: read initial state from files.
2066    o AIM : add stratospheric drag in the upper level
2067    
2068    checkpoint51d_post
2069    o change function ILNBLNK (=> last non-blank char.) to return zero
2070      (instead of the string length) when the string. char is empty
2071    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2072    o modif's to restore TAMC compatibility
2073      - avoid "_d" constructs in PARAMETER declarations
2074      - avoid interrupting lines by comment lines
2075    o Use cluster local disks for purely local I/O
2076      vs. globally visible disks needed for ctrl stuff
2077      (merged from ecco-branch)
2078      - new active_file_loc... and mdsio_..._loc routines
2079      - affected packages: autodiff, ctrl, grdchk, mdsio
2080    
2081    checkpoint51c_post
2082    o introducing integer flag debugLevel
2083      - debLevZero: suppress all output
2084      - debLevA: standard
2085      - debLevB: equivalent to current debugMode=.TRUE.
2086    o introducing pathname variable mdsioLocalDir for mdsio
2087      that can be specified at runtime
2088      (relevant for cluster I/O to local disk)
2089    `
2090    >>>checkpoint51b_post
2091    adjoint of ptracers
2092    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2093    o extended state in checkpoint_lev?, etc.
2094    o alternative ctrl/cost with tr1 or ptracer
2095    o new comlev1_bibj_ptracers
2096    o new ptracers.flow
2097    o made ptracers_forcing same as external_forcing_s
2098    o added verification for adjoint with ptracers
2099      - adm. grdchk fail so far
2100      - tlm. grdchk OK
2101      - checked tapelev/comlev recomputations: OK
2102    <<<checkpoint51b_pre
2103    
2104    checkpoint51a_post
2105    o added code for biogeochemistry package
2106      - new pkgs: dic, gchem
2107      - new subroutine in ptracers
2108    o modify code for biogeo packages
2109      - in model/src and pkg/ptracers
2110    
2111    checkpoint51
2112    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2113      - autodiff, ctrl, exf, grdchk, seaice
2114      kept separate packages
2115      - cost, ecco, obcs
2116    o updating verification/internal_wave, verification/lab_sea
2117      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2118    
2119    checkpoint50i_post
2120    o Preparing next differentiable checkpoint and sync
2121      of MAIN vs. ecco-branch
2122      - 1st step: this one is differentiable
2123      - 2nd step: next(! not this) checkpoint will have updated packages
2124                  from ecco-branch)
2125    
2126    checkpoint50h_post
2127    o new package "land": provide surface BC for AIM.
2128    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2129    o AIM: use true log-P extrapolation for near surface temp (= as in
2130        F.Molteni paper) ; update aim.5l_cs output.
2131    o New variable in PARM03 for more flexible pickups
2132    o somewhat cleaned package initialisation sequence for
2133      ctrl/ cost/ ecco/ in packages_... routines
2134    
2135    checkpoint50g_post
2136    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2137      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2138      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2139        made the default because of faster convergence than ADI
2140    
2141    checkpoint50f_post
2142    o exf totally restructured
2143      - replaced all exf_set_ routines by one generic exf_set_gen.F
2144        and made sure it's still differentiable
2145      - split exf_getffields.F into new exf_bulkformulae.F
2146      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2147      - updated adjoint/makefile and relevant verif. accordingly
2148    
2149    checkpoint50f_pre
2150     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2151          + change Evap over land. (update aim.5l_cs output)
2152     o added missing .cvsignores and made uniform across expts
2153     o changed configuration of tidal_basin_2d expt
2154     o added pkg/debug functions for tracing code in fatal crashes
2155     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2156     o new fn in pkg/monitor to stop model if solution grows too big
2157     o removed lots of single quotes from comments
2158    
2159    checkpoint50e_post
2160    o make KPP work with PTRACERS
2161     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2162       nearly a copy of kpp_transport_s
2163     - there is no analogue to SurfaceTendencyS, so I have to use
2164       gPtr(of the surface layer) instead
2165    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2166    checkpoint50e_pre
2167    
2168    checkpoint50d_post
2169    o change kpp output from multiple-record state files to single-record state
2170      files analogous to write_state.F
2171    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2172      analogous to the cg2d-related output.
2173    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2174      so that writing to internal file fn (with length 512) fails.
2175    checkpoint50d_pre
2176    
2177    checkpoint50c_post
2178    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2179    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2180    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2181    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2182    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2183    
2184    checkpoint50c_pre
2185    Merging from release1_p13:
2186    o bug fix for pkg/seaice dynamic solver
2187    o Added SEAICE_initialHEFF to pkg/seaice
2188    
2189    checkpoint50b_post
2190    o store u*,v* in gU,V instead of in guNm1,gvNm1
2191    o in order to put the momForcing out of the Adams-Bashforth:
2192      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2193      to timestep.F
2194    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2195    o re-generate output for highly sensitive test-exp:
2196       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2197    
2198    checkpoint50b_pre
2199    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2200    o corrected CPP option mismatch in exf_Bulk... functions for case
2201      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2202    
2203    checkpoint50a_post
2204    o Bug fix for merging between c50 and KPP.
2205      ikey was passed from thermodynamics to kpp_calc via
2206      common block rather than being recomputed in kpp_calc,
2207      in contradiction with new key itdkey.
2208      New key ikppkey created, and tamc.h headers updated.
2209    
2210    checkpoint50
2211    - 2nd step of merge with ecco-branch:
2212      merge changes in ecco-branch back into main trunk
2213    - bug fix in find_alpha
2214    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2215    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2216    - merged some sliced AD support routines
2217    
2218    checkpoint49
2219    merged from ecco-branch:
2220    o exf:
2221      - Enable initialisation of forcing fields to constant
2222        (runtime) values.
2223      - in exf_getffields.F
2224        Reduce i-/j-loop to interior domain, discarding overlaps.
2225        That also fixes wrong TAF-key computations for key_1, key_2
2226        with bulf formulae.
2227      - exf_init.F modify #ifdef for exf_init_evap
2228      - exf_getffieldrec.F, ctrl_getrec.F
2229        The following INT-usages are not safe:
2230          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2231          fldcount = int(fldsecs/fldperiod) + 1
2232        and were modified.
2233    o autodiff: checkpoint_lev...
2234      - updated storing for bulk formulae (some arrays were missing)
2235      - added state for seaice package
2236      - synchronized with main branch
2237    o DIVA:
2238      Modif.s in
2239      - the_main_loop.F
2240      - the_model_main.F
2241      and added cost_final_restore.F cost_final_store.F
2242      o With these changes, it is possible to fully separate
2243        the first forward run to compute the cost function (mdthe_main_loop)
2244        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2245        into separate model executions.
2246        This enables better tuning of DIVA to given queue sizes.
2247      o Loss of cost function value in consecutive DIVA runs is
2248        fixed by storing to 'costfinal' file.
2249      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2250        beginning/end of adjoint integration is accounted for.
2251      The current changes apply to TAF-1.4.26.
2252      TAF has one remaining bug, requiring one manual change
2253      (see MITgcm manual).
2254    o cal: synchronized between MAIN and ecco-branch
2255    
2256    checkpoint48i_post
2257    o Changes to restore differentiability of code w.r.t. previous tag
2258      (mostly adding new routines to make list and replacing
2259      pressure by totPhiHyd).
2260    o Updated and merged grdchk package
2261      - has both ADM and TLM checks
2262      - works for single- and multi-proc.
2263      - output cleaned
2264      - worked successfully for parallel DIVA
2265    o genmake:
2266      - Adding -platform=SP4
2267      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2268    o Modif. for DIVA:
2269      ctrl_unpack should not be called in intermediate DIVA interval.
2270      (similar thing would apply for active files such as
2271      tbar, sbar, psbar, which should not be reinitialised;
2272      only relevant for ecco-branch)
2273    
2274    checkpoint48h_post
2275    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2276    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2277    o Added SEAICE_initialHEFF to pkg/seaice
2278    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2279    
2280    checkpoint48g_post
2281    --- EOS:
2282    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2283      store total Potential in totPhyHyd for diagnostics & EOS.
2284    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2285    --- Pressure/geopotential gradient:
2286    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2287    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2288      ( changes results of global_ocean_pressure )
2289    o NLFS + z-coord.: add eta*Rho' contribution.
2290    o accurate phiHyd when using interface-W at the middle between 2 centers
2291     ( changes results of ideal_2D_oce )
2292    o includes r* 2nd term in potential gradient.
2293    
2294    checkpoint48f_post
2295    Merging from release1_p12:
2296    o Modifications for using pkg/exf with pkg/seaice
2297      - improved description of the various forcing configurations
2298      - added basic radiation bulk formulae to pkg/exf
2299      - units/sign fix for evap computation in exf_getffields.F
2300      - updated verification/global_with_exf/results/output.txt
2301    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2302      (SBO) core products, including oceanic mass, center-of-mass,
2303      angular, and bottom pressure (see pkg/sbo/README.sbo).
2304    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2305      to avoid negative values in shallow regions.
2306      - updated verification/natl_box/results/output.txt
2307      - updated verification/lab_sea/results/output.txt
2308    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2309    o Added useSingleCpuIO option (see PARAMS.h).
2310    o Updated useSingleCpuIO option in mdsio_writefield.F to
2311      work with multi-field files, e.g., for single-file pickup.
2312    o pkg/seaice:
2313      - bug fix in growth.F: QNET for no shortwave case
2314      - added HeffFile for specifying initial sea-ice thickness
2315      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2316    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2317      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2318    o pkg/seaice:
2319      - adjoint-friendly modifications
2320      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2321    
2322    checkpoint48e_post
2323    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2324    o dynamics: change definition of computational domain & adapt mom_fluxform
2325      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2326    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2327        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2328        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2329        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2330        inverted_barometer solid-body.cs-32x32x1
2331      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2332    
2333    checkpoint48d_post
2334    o in preparation for r*:
2335     a) use pre-computed gradient of hydrostatic potential:
2336        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2337     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2338        => affects results of glob_oce_pressure (different truncation error)  
2339      update output.txt of ideal_2D_oce & global_ocean_pressure
2340    
2341    checkpoint48d_pre
2342    o in preparation for r*:
2343      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2344      pass the 2 comp. of the grad. as arguments to momentum S/R.
2345      but for the moment, only used if it does not change the results.
2346    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2347    
2348    checkpoint48c_post
2349    Modifications in treatment of initial flux forcing controls
2350    to avoid extra storing of flux fields.
2351    
2352    checkpoint48c_pre
2353    o Added tidal_basin_2d experiment (currently 1D!)
2354    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2355    
2356    checkpoint48b_post
2357    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2358     (modification to pressure gradient not yet implemented)
2359    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2360      (for U & V) that are used for vertical advection of momentum.
2361    
2362    checkpoint48a_post
2363    o In preparation for r*, use temp. array to compute vertical transport
2364       in flux-form momentum pkg. => change results of few test-exp.
2365      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2366                        lab_sea, natl_box & plume_on_slope
2367    
2368    checkpoint48
2369    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2370    
2371    checkpoint47j_post
2372    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2373    o moved adexch from forward_step to addummy_in_stepping
2374    o added exch in ctrl_map_...
2375    o aveFreq.=0. at end of cost_final to avoid overwrite in
2376      reverse checkpointing loop
2377    o Yet more changes in gmredi:
2378      * adgmredi_calc_tensor
2379        avoiding all recomputation of gmredi_slope_limit
2380      * adgmredi_x/y/rtransport
2381        added flag for excessive storing to avoid recomp. of
2382        u/v/rtans, dTdx/y/z
2383        -> this is not really necessary and very memory-consuming
2384      * adgmredi_slope_psi:
2385        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2386      * gmredi_slope_limit
2387        re-activated full calculation of taperfct for case 'ac02'
2388    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2389    
2390    checkpoint47i_post
2391    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2392    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2393      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2394    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2395    o gmredi: fix few bugs.
2396    
2397    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2398    This will be a good checkpoint to plug into the ecco-branch.
2399    o few modif.'s to get latest version adjointed
2400      (mainly kick out code in ini_linear_phisurf)
2401    o modif's to run adjoint with exactConserv
2402    o case GM_BOLUS_ADVEC should be cleaned
2403      S/R gmredi_slope_psi should be cleaned
2404    o verification/carbon now has exactConserv=.TRUE.
2405    
2406    checkpoint47g_post
2407    o time-average AIM output: becomes independent from statvars time-average
2408      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2409    o After TAF bug fix:
2410      Tested adjoint of gmredi package.
2411      Tests were done with checkpoint47 rather than with latest
2412      checkpoint47f_post since the latter is broken for the adjoint
2413      verification/carbon/ contains both ADM and TLM gradient checks.
2414    Here they are, before they get changed/lost/stolen.
2415    Mostly modif.'s to fix numerical sensitivities.
2416    Gradient checks OK for
2417    - GM_taper_scheme:
2418      * clipping
2419      * ac02
2420      * linear
2421      * glw91
2422      * dm95
2423      * ldd97
2424    - GMREDI_OPTIONS:
2425      * GM_VISBECK_VARIABLE_K
2426      * GM_NON_UNITY_DIAGONAL
2427      * GM_EXTRA_DIAGONAL
2428      * GM_BOLUS_ADVEC
2429    in conjunction with data.gmredi parameters to be checked in
2430    in a few minutes under verification/carbon/code/
2431    
2432    checkpoint47f_post
2433    Merging from release1_p10:
2434    o modifications for using pkg/exf with pkg/seaice
2435      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2436        and SEAICE_EXTERNAL_FLUXES
2437      - pkg/exf CPP options EXF_READ_EVAP and
2438        EXF_NO_BULK_COMPUTATIONS
2439      - usage examples are Experiments 8 and 9 in
2440        verification/lab_sea/README
2441      - verification/lab_sea default experiment now uses
2442        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2443    
2444    checkpoint47e_post
2445    o created a tag prior to creating a branch
2446    
2447    checkpoint47d_post
2448    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2449      at the bottom boundary had an erroneous half slip boundary condition
2450    o added bottom drag and no slip boundary condition capabilities to
2451      oceanic pressure coordinates code
2452    o added new verification experiment global_ocean_pressure, this experiment is
2453      also described in the tutorial section of the manual
2454    checkpoint47d_pre
2455    
2456    checkpoint47c_post
2457    o Added a verification experiment for a global cubed-sphere ocean run
2458      -  verification/global_ocean.cubed32x32x30
2459      -  uses pkg/therm_seaice and pkg/bulk_forcing
2460    
2461    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2462    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2463      when using P-coordinate; only implemented for atmospheric config.
2464    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2465      NOTES: requires option NONLIN_FRSURF to be "#define".
2466    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2467    
2468    checkpoint47b_post
2469    Merging from release1_p9:
2470    o pkg/seaice
2471      - removed GOTO's and added taf directives
2472      - double precision constants to reduce the g77 (Linux)
2473        to F77 (SGI) differences reported in release1_p8
2474    o tools/genmake
2475      - added SGI options
2476    o verification/testscript
2477      - updated to that of checkpoint47a_post
2478    o verification/global_ocean.90x40x15/input/eedata
2479      - modified for SGI f77 compatibility
2480    o verification/lab_sea
2481      - added description of sea-ice model
2482      - added missing matlab routines
2483      - added test of thermodynamics parallelization
2484    
2485    checkpoint47a_post
2486    o new pkg: aim_v23
2487     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2488       for now, keep the same surface forcing as before.
2489     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2490     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2491     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2492    o add diagnostic of surface correction term in monitor output
2493    
2494    o bulk_force and therm_seaice
2495    - Two packages:  bulk_force (Bulk forcing)
2496      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2497    - Earlier integration from Stephaine Dutkiewicz
2498      and Patrick Heimbach.
2499    - Two ifdef statements for compile time,
2500       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2501    
2502    checkpoint47
2503    differentiable version of checkpoint46n_post
2504    o bug fix in quasihydrostaticterms
2505    o * "clean" adjoint code (in terms of extensive recomputations)
2506        can now be obtained for all GMREDI options (i.e. for
2507        - GM_VISBECK_VARIABLE_K
2508        - GM_NON_UNITY_DIAGONAL
2509        - GM_EXTRA_DIAGONAL
2510        - GM_BOLUS_ADVEC )
2511      * However, wrong gradient check problem remains unsolved.
2512      * New CPP options have been introduced for different
2513        tapering schemes
2514    o external_fields_load now part of differentiation list
2515    o pressure needs multiple storing;
2516      would be nice to have store_pressure at beginning or
2517      end of forward_step, e.g. by having phiHyd global (5-dim.)
2518      (NB: pressure is needed for certain cases in find_rho,
2519      which is also invoked through convective_adjustment).
2520    o recomputations in find_rho for cases
2521     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2522    o #define ATMOSPHERIC_LOADING should be differentiable
2523    o ini_forcing shifted to begining of initialise_varia
2524    o Incorporating QNVS line search routines into MITgcm
2525      (this is separate code, and therefore not under pkg)
2526      lsopt/, optim/
2527    o Updated verification/carbon/
2528      - #define GM_VISBECK_VARIABLE_K
2529      - GM_taper_scheme    = 'ldd97'    
2530    
2531    checkpoint46n_post
2532    Merging from release1_p8:
2533    o verification/natl_box:
2534      updating new external_fields_load routine
2535    o New package: pkg/seaice
2536      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2537      The sea-ice code is based on Hibler (1979-1980).
2538      Two sea-ice dynamic solvers, ADI and LSR, are included.
2539      In addition to computing prognostic sea-ice variables and diagnosing
2540      the forcing/external data fields that drive the ocean model,
2541      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2542      The implied surface heat flux is then stored in variable
2543      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2544      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2545      non-local transport term.  Because this call precedes model
2546      thermodynamics, temperature under sea-ice may not be "exactly" at
2547      the freezing point by the time theta is dumped or time-averaged.
2548      N.B.: fairly large differences in accuracy occur across
2549            different platforms/compilers; comparison between
2550            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2551            generated output gives:
2552       T           S           U           V
2553      C D M    c        m  s        m  s        m  s        m  s
2554      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2555      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2556      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2557    
2558      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2559    o GAD:
2560      - generated new common blocks to account for call of
2561        same gad routines with differing traceridentities
2562        (needed to modify tracerIdentity indices in GAD.h)
2563      - generated separate common blocks for case useCubedSphereExchange
2564        (Department of Futurology)
2565      - parameter lists to gmredi_?transport: added tracerIdentity
2566      - added new key indices to tamc.h
2567    o external_fields_load:
2568      - added this routine to TAF list
2569      - needed to make some common blocks global and additional storing
2570        along the same lines as exf package (checkpoint_lev?_directives.h)
2571    o exf:
2572      updated external forcing package
2573      - bug fixes carried over from ecco-branch
2574        (missing OBCS_OPTIONS.h in two routines)
2575      - enable easy to use "no forcing".
2576      - added exf I/O for atmospheric loading
2577      - added exf I/O for runoff data
2578      - transfered scaling between exf <-> MITgcm to exf namelist
2579    o Adding new verification experiment global_with_exf.
2580      This verification experiment is almost identical to the
2581      global_ocean.90x40x15 experiment, except that it uses
2582      the exf (and cal) package instead of the
2583      external_fields_load routine (cf README file).
2584    
2585    checkpoint46m_post
2586    o modified testscript to return -- when there are no lines of "%MON" output
2587    o added new flag "quasiHydrostatic" for QH mode
2588      and new routine quasihydrostaticterms()
2589    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2590      New routine: mom_u_coriolis_nh()
2591    o fixed sign of non-hydrostatic metric terms in u and v equations.
2592      Depend on correct sign of gravitySign.
2593    o added work.pc* to .cvsignore in aim directories using ifc
2594    o introduced flag for controllin non-hydrostatic metric terms
2595    o removed gravitySign from PARM04
2596    o switched to g77/ifc from pgf77 in aim experiments
2597    
2598    checkpoint46l_post
2599    o made convective adjustment work with pressure coordinates:
2600     - changed the direction of k-loop in convective_adjustment.F for the
2601       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2602     - adjusted the reference pressure k-index in convective_adjustment.F
2603     - adjusted the convection condition in convect.F (in analogy to
2604       calc_ivdc.F)
2605     - convective_adjustment no longer computes anything on the halos
2606     - removed the warnings about negative salinity from find_rho.F and
2607       find_alpha.F; instead the new routine look_for_neg_salinity, called
2608       at the beginning of find_rho, find_alpha, and find_beta, does a
2609       check of the entire slice, if CPP-option
2610       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2611    checkpoint46l_pre
2612    
2613    checkpoint46k_post
2614    o fixed the verification/global_ocean.90x40x15 experiment:
2615     - new bathymetry (the world according to A., JMC, and M.)
2616     - new initial fields and forcing fields (*.bin files)
2617     - new POLY3.COEFFS (for the next release one should switch to a full
2618       equation of state: JMD95P or MDJWF)
2619     - fixed several errors and redundancies in the data file
2620     - experiment uses looped cells
2621     - added matlab directory with diagnostic scripts for plotting of output
2622    
2623    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2624     - read AIM physics parameters from a file (data.aimphys)
2625     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2626    
2627    checkpoint46j_post
2628    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2629    o move wVel computation at the end of the time step, in S/R integr_continuity
2630    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2631    o update timeave pkg for wVel diagnostic.
2632    checkpoint46j_pre
2633    
2634    checkpoint46i_post
2635    o Clean up AIM package (and keep the results unchanged):
2636      include CPP_OPTION and use IMPLICT NONE in all routines ;
2637      declare all the variables _RL ; use _d 0 for all numerical constants.
2638      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2639    
2640    checkpoint46h_post
2641    o cleaned up the use of rhoNil and rhoConst.
2642      - rhoNil should only appear in the LINEAR equation of state, everywhere
2643        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2644        and the dynamical equations are all divided by rhoConst
2645    o introduced new parameter rhoConstFresh, a reference density of fresh
2646      water, to remove the fresh water flux's dependence on rhoNil. The default
2647      value is 999.8 kg/m^3
2648    o cleanup up external_forcing.F and external_forcing_surf.F
2649      - can now be used by both OCEANIC and OCEANICP
2650    checkpoint46h_pre
2651    
2652     Added code to convert surface volume flux (fresh water) into
2653     a mass flux when using P coordinates in the ocean (OCEANICP).
2654     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2655    
2656    checkpoint46g_post
2657    o Include a new diagnostic variable phiHydLow for the ocean model
2658      - in z-coordinates, it is the bottom pressure anomaly
2659      - in p-coordinates, it is the sea surface elevation
2660      - in both cases, these variable have global drift, reflecting the mass
2661        drift in z-coordinates and the volume drift in p-coordinates
2662      - included time averaging for phiHydLow, be aware of the drift!
2663    o depth-dependent computation of Bo_surf for pressure coordinates
2664      in the ocean (buoyancyRelation='OCEANICP')
2665      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2666        Theta, Salinity, and Pressure in the parameter list. This routine is
2667        presently contained in find_rho.F. This routine does not give the
2668        correct density for 'POLY3', which would be a z-dependent reference
2669        density.
2670    o cleaned up find_rho
2671      - removed obsolete 'eqn' from the parameter list.
2672    o added two new verification experiments: gop and goz
2673      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2674    checkpoint46g_pre
2675    
2676    checkpoint46f_post
2677    o Enable tangent linear (forward mode) gradient checks:
2678      - extended active file handling to g_... files
2679      - added TANGENT_SIMULATION to theSimulationMode
2680      - extended grdchk package accordingly
2681    o added tangent linear setup in verification/carbon/code_ftl
2682    o added adjoint setup in verification/front_relax/code_ad
2683    
2684    checkpoint46e_post
2685    o Added new equation of state -> MDJWF
2686      - EOS of McDougall et al., 2002, JAOT, submitted
2687      - caveat: the equation of state is only valid for a smaller (more
2688        realistic?) range of values than JMD95P/Z and UNESCO
2689      - added masks to the calculation of pressure in store_pressure
2690      - added more check values for density in check_eos (ini_eos.F), some of
2691        the old check values are out of the range of the MDJWF-eos, so don't
2692        expect perfect matches for those
2693    checkpoint46e_pre
2694    
2695    checkpoint46d_post
2696    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2697      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2698      case of pressure coordinates. eosType='JMD95Z' in
2699      combination with buoyancyRelation='OCEANICP' now causes an error.
2700    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2701      in find_alpha/beta.
2702    checkpoint46d_pre
2703    
2704    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2705      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2706    
2707    checkpoint46c_post
2708    o Changes necessary for ocean in p-coordinates
2709     -  Added new buoyancy relation = 'OCEANICP'
2710     -  Added new parameters = gravitySign (this used to be contained inside
2711        the factor dRdZ which I added when we first switched to R coordinates).
2712     X GM/Redi is not compatible (yet)
2713     X bottom drag and no-slip need to be debugged.
2714    checkpoint46c_pre
2715    
2716    checkpoint46b_post
2717    o Added new equation of state -> JMD95Z and JMD95P
2718      - EOS of Jackett and McDougall, 1995, JAOT
2719      - moved all EOS parameters into EOS.h
2720      - new routines ini_eos.F, store_pressure.F
2721    o Added UNESCO EOS, but not recommended because it requires
2722      in-situ temperature (see JMD95)
2723    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2724      unesco.f to be used with POLY3
2725    checkpoint46b_pre
2726    
2727    checkpoint46a_post
2728    o Added (atmospheric) pressure loading
2729      - new field in FFIELDS.h, etc...
2730      - new cpp flag ATMOSPHERIC_LOADING
2731    o Changed hFacC to _hFacC in calc_phi_hyd.F
2732    o Added SHORTWAVE_HEATING to some files for consistency
2733    checkpoint46a_pre
2734    
2735    checkpoint46
2736    further merges from release1_p5
2737    o new ctrl package
2738      - adopted from ECCO environment to enable optimization
2739      - added Eliassen Palm fluxes to controls
2740    o added Eliassen Palm flux controls to gradient check package
2741    o cost package
2742      - Compatible with new ctrl package
2743      - added Eliassen Palm cost hooks
2744      - modif's of existing cost functions
2745    o Adjoint-related bug fixes in kpp:
2746      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2747      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2748    o autodiff package
2749      - flow directives:
2750        + new for S/R do_the_model_io
2751        + enhanced for S/R checkpoint
2752        + new gmredi.flow
2753      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2754        disable adcommon.h/g_common.h by default.
2755      - fixed problem for adjoint of global_max
2756    o modified verification/carbon/
2757    o New setup for adjoint of global_ocean
2758    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2759    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2760    o incorporated hooks for sponge layer code (external_forcing.F)
2761    
2762    checkpoint45d_post
2763    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2764    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2765      (affects plume_on_slope "cg2d" output)
2766    o add new parameter deltaTfreesurf for free-surface time stepping
2767    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2768    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2769    o change phiMin in exp1 (to agree with documentation)
2770    o add new flags:
2771     - T,S forcing inside/outside Adams-Bashforth
2772     - turn off temp,salt advection and/or forcing
2773     - for each tracer, define internal flag for multiDimAdvection & A-B
2774    o monitor: change definition of KE to check conservation of Energy
2775    
2776    checkpoint45c_post
2777    o Removed f90 comments ("!")
2778    o Modified initialisations to enable exf package for MITgcm
2779      (without invoking ECCO_PACKAGE).
2780    o modifications to gradient check package (Martin Losch)
2781      - enable centered differences
2782      - modified format of standard output
2783    
2784    checkpoint45b_post
2785    o cleaned exchange calls in cg2d
2786    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2787    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2788      to configure barotropic setup (Martin Losch)
2789    o moved some initialisations within bi,bj loop in dynamics
2790      (TAF flow dependency)
2791    o in initialise_varia, moved call packages_init_variables
2792      before convective_adjustment_init
2793      (corresponding adjustment of TAF tape initialisation).
2794    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2795    
2796    checkpoint45a_post
2797    o compute Rho over the whole domain (extend iMin,jMin indices)
2798    o specific exchange for X-slice domain (case Ny=1)
2799    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2800    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2801    
2802    checkpoint44h_post = checkpoint45
2803    o Fix to restore differentiability:
2804      place at which packages_init_variables is called in
2805      initialise_varia is crucial for reverse control flow.
2806    o modifications in GMRedi to enable stable adjoint
2807      (corresponding modif's in thermodynamics, dynamics)
2808    o added missing hook for sponge layer code in external_forcing
2809    o modified test cost functions
2810    o storing in gad_advection (plus removal of write(0,*)!
2811    o missing headers TR1.h added in convective_adjustment routines
2812    o errorMessageUnit set non-equal zero in eeboot
2813      (conflict on some platforms, e.g. IBM SP3)
2814    o modified carbon verif.
2815    
2816    checkpoint44h_pre
2817    o vertical grid option: allow to put the Interface at the middle between
2818      2 cell-centers ; replace delZ in pkg/kpp by drF.
2819    o GM Advective form: Tracers are advected using the residual transport (=
2820      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2821    
2822    checkpoint44g_post
2823    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2824      results) ; ifdef missing in thermodynamics.F
2825    
2826    checkpoint44f_pre,checkpoint44f_post
2827    o added PTRACERS package
2828      This allows an arbitrary number of passive tracers to be integrated
2829      forward simultaneously with the dynamicaly model.
2830      + Implemented so far:
2831        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2832        - I/O and checkpointing
2833        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2834      + Not implemented so far:
2835        - KPP
2836        - OBCS
2837      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2838        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2839        line in data.pkg.
2840      + This package is disabled by default since it increases storage.
2841    
2842    
2843    o testscript: added -cleanup option
2844    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2845                 b) enable to filter 2D fields.
2846    
2847    checkpoint44e_pre,post
2848    o re-wrote convective adjustment to use pre-calculated weights
2849      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2850      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2851      Original calls to convect() still in place.
2852    
2853    chkpt44d_pre,post
2854    o added missing EXCLUDE_MONITOR flags
2855    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2856      (incompatible typ in MIN/MAX expressions caused problems
2857      on IBM SP3)
2858    o in genmake added variable MAKEDEPEND
2859      plus resetting for case SunOS
2860    o added timer_stats.c routine for IBM SP3
2861    o removed variables in dynamics
2862    !!! I forgot to create tag chkpt44d_pre !!!
2863    !!! But chkpt44d_pre = chkpt44c_post    !!!
2864    
2865    o real fresh water flux implemented with non-linear free-surface.
2866    
2867    chkpt44c_pre,post
2868    o few fix (mask in shap_s2, EmPmR in external_field_load,
2869      USE_NATURAL_BCS in solve_for_P);
2870    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2871    
2872    checkpoint44b_pre/_post
2873    o merge of relevant stuff from the ecco-branch:
2874      - genmake: removed $S64 overwrite for case SunOS
2875      - pkg/exf: update and corrections for field swapping and obcs
2876      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2877                  harmonized between ECCO and MITgcm
2878      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2879                      updated checkpointing_lev... lists for obcs
2880      - model/src: minor changes in forward_step, plot_field
2881                   added directive for divided adjoint in the_main_loop
2882      - pkg/mdsio: added mdsio_gl_slice
2883    
2884    o check parameters & config (chkpt44a_pre,post)
2885    o OBC and NonLin_FrSurf.
2886    
2887    checkpoint44
2888    o fix bug in mom_vi_del2uv
2889    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2890    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2891    o update AIM experiments (NCEP input files)
2892    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2893    o added some stuff for AD
2894    
2895    checkpoint43
2896    o added two new advection tests
2897    o added global 4x4 degree ocean test
2898    o added test of H&S94 with free surface on cube
2899    o some final mods for gradient check, adjoint,...
2900    
2901    checkpoint42
2902      Fixed AD-related problems:
2903    o Store directives up-to-date with re-arranged Adams-Bashforth
2904      (mainly thermodynamics.F)
2905    o New store directives for multi-dim. advection schemes
2906      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2907      * new common block and key passkey
2908      (mainly gad_advection.F)
2909    o Modified store directives for split of dynamics/thermodynamics
2910      for the case ALLOW_KPP
2911    o Cleaned argument list for timestep_tracer.F
2912    
2913    checkpoint41
2914    o re-formatted/added comments in prologues of key subroutines
2915      to work with protex
2916    
2917    checkpoint40
2918    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2919    o added FLT (floats) package from Arne along with demo. experiment
2920    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2921      implementation of forward-in-time forcing terms
2922    o more mods for non-linear free-surface including new variable
2923    o modified multi-dim method to work on cube
2924    o bug fix in KPP (from DM)
2925    
2926    checkpoint40pre9
2927    o added DST advection schemes
2928    o fix MPI bug on SGI's
2929    o modifications for non-linear free-surface
2930    o fixed conditionals for fixed flow/passive tracer only mode
2931    o added tension/strain form of stress tensor
2932    o changes to commenting of arguments for TAF/TAMC
2933    o added/updated many matlab scripts
2934    o added multi-dimensional advection method for tracers
2935      
2936    checkpoint40pre8
2937    o new package rw/
2938      Added method for dumping intermediate local arrays:
2939      mdsio_writetile - same as mdsio_writefield except works from inside
2940                        bi,bj loop
2941      mdsio_writelocal - same as mdsio_writetile except works for local
2942                         arrays
2943      write_local_r? - higher-level wrapper for mdsio_writelocal
2944      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2945      Example given at end of mom_vecinv.F that dumps some local arrays.
2946    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2947      control flux-form versus vector invariant code.
2948      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2949      or genmake -DISABLE ...
2950    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2951      (additional storing is now needed for case vecinv;
2952      currently nothing implemented to switch this storing off
2953      in case fluxform is used since no CPP flag available).
2954    
2955    checkpoint40pre7
2956    o bug fix in dynamics.F
2957      calc_viscosity called before k=1,Nr loop.
2958    o added some #ifdef's ALLOW_PASSIVE_TRACER
2959    o cleaned initialisations in ctrl_map_ini
2960      related to TAF
2961    
2962    checkpoint40pre6
2963    o split dynamics into thermodynamics & dynamics
2964    o corresponding split of calc_diffusivity into
2965      calc_diffusivity, calc_viscosity
2966      (kpp_calc_diff, kpp_calc_visc).
2967    o Added diffkr, kapgm to control variables
2968    o bug fix in gmredi_slope_limit for ldd97
2969    
2970    checkpoint40pre5
2971    o proper initialization of Adams-Bashforth time stepping
2972      + uses forward step for very first step of model (iter=0)
2973    o re-generated *all* output since almost all output is modified by this
2974      change (sorry but we've been putting this one off for about 2 years)
2975      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2976        *not* regenerated since they are already out of date and I don't
2977        want to create the impression that they are suddenly working.
2978    o removed KAP stuff for DEC's
2979    o modified/added many .cvsignore files in */code and */input
2980    o added new expt "solid-body.cs-32x32x1"
2981      + this uses an alternative form of ini_curvilinear_grid.F which
2982        is not necessarily any better than the current one...
2983    
2984    checkpoint40pre4
2985    o added re-initialisations of utrans,vtrans,rtrans in
2986      calc_common_factors which are crucial for TAF.
2987    o extended iMin,jMin range for calc_common_factors,
2988      calc_diffusivity
2989    o added option ALLOW_PASSIVE_TRACER
2990    o a few minor updates and fixes
2991    
2992    checkpoint40pre3
2993    o created calc_gtr1.F for gad package
2994    o split the_main_loop and re-introduced forward_step
2995    o some recomputations of nIter0 for TAMC
2996    
2997    checkpoint40pre2
2998    o Updated to latest branch of AJA, JMC
2999    o Added gradient check package
3000    o Added routines for passive tracer handling
3001    o Added carbon sequestration sensitivity experiment
3002    
3003    checkpoint39
3004     o Modifications and fixes to support TAMC
3005       (mainly missing or wrong directives)
3006     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3007       in addummy_in_stepping
3008     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3009     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3010     o Included following packages:
3011       cal: calendar
3012       exf: external forcing
3013       ecco: essential routines to control use of cal, exf
3014             (NB: this is not the full ECCO environment)
3015     o disabled some packages by default in genmake
3016    
3017    checkpoint38
3018     o see notes_c37_adj.txt
3019     o corrected wrong layer index in external_forcing_t
3020     o replaced the_main_loop/forward_step by the_main_loop
3021     o removed forceoutput from write_state
3022       (replaced criteria for initial/final state)
3023     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
3024    
3025    checkpoint37
3026     o mdsio.F routine split and packaged in pkg/mdsio
3027       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
3028        used unless genmake -disable=mdsio)
3029     o allow a more precise surface-geopotential gradient for the atmosphere
3030       taking into account the change in space of Alpha (=1/rho) at the surface.
3031     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
3032       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
3033     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
3034       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
3035       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
3036     o Time-Average diagnostics defined as a pseudo package "timeave".
3037     o pickup files : old pickup (before c35) did not work with new code (c35
3038       and after) unless activating 2 commented lines in initialise-varia.
3039     o Non-Hydrostatic pickup file Pb fixed.
3040     o bug with Rigid-lid version (since c35) fixed.  
3041    
3042    checkpoint36
3043     o implement Crank-Nickelson barotropic time-stepping
3044     o recover Time-Average diagnostics
3045     o fix Pb in checkpoint (PR#19)
3046     o AIM become a standard package ; clean unused CPP_kees
3047    
3048    checkpoint35
3049     o subtantial rewrite of dynamics.f
3050     o allows staggered time-stepping
3051     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
3052     o added bottom drag (linear + quadratic)
3053    
3054    checkpoint34
3055     o Modified exchange routines for correct reverse simulation.
3056     o Added verification output to comply with bug fix in impldiff.F
3057       as of c33 (exp2, natl_box).
3058     o Corrected store directives in dynamics.F
3059     o Corrected array boundaries in impldiff.F
3060     o Corrected array dimensions in gmredi.
3061       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
3062     o Added routine GLOBAL_SUM_INT to global_sum.F
3063     o Added mdsio_gl.F for ECCO purposes.
3064    
3065    checkpoint33
3066     o Fixed bug in lower BC in impldiff.F
3067     o Fixed confusion about units of forcing arrays in FFIELDS.h
3068       namely Fu,Fv,Qnet,Qsw,EmPmR:
3069       - Removed verification/natl_box/code/external_fields_scale.F
3070         (did not differ from that in model/src)
3071       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
3072         (see FFIELDS.h for description)
3073       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
3074         kpp_calc.F and kpp_transport_t.F
3075       - Removed model/src/external_fields_scale.F and calls to it
3076       - verification/natl_box uses flux data with "atmospheric" sign so
3077         a special version of external_fields_load.F is used to
3078         change the data as it's read in. This way, the arrays
3079         have the right units and signs at all times tha a user could
3080         possibly use them.
3081     o Corrected genmake to delete a temporary file during configuration
3082    
3083    checkpoint32
3084     o Scaling of forcing fields moved from external_forcing.F to
3085       external_fields_scale.F, called directly after loading fields.
3086     o Surface relaxation terms added to surface tendency fields in
3087       extra subroutine.
3088     o impldiff.F changed to avoid storing by TAMC of huge intermediate
3089       fields.
3090     o Changes in GMRedi to comply with packaging structure.
3091     o Modifications and bug fixes in KPP package.
3092     o Verification experiment for KPP added (verification/nat_box/)
3093    
3094    checkpoint31
3095     o Packages interface brought in line with defined standard
3096       -> new routines packages_...F
3097       -> changes in initialise_fixed.F, initialise_varia.F
3098       -> enables initialisation interface for ECCO package
3099     o Rescaling of external forcing fields immediately after read
3100       (removed from external_forcing.F)
3101       -> new: surface_fields_scale.F
3102       -> affects ini_foorcing.F, external_fields_load.F
3103     o Computation of surface tendencies before tendency updates.
3104       -> new: external_forcing_surf.F
3105     o Change of variable names useGMRedi, useKPP, useECCO
3106     o Further changes in dynamics.F, impldiff.F for TAMC
3107     o Tested for experiments 0, 2, 4.
3108       - not yet tested for GMRedi.
3109       - not yet tested for KPP.
3110    
3111    checkpoint30
3112     o Updates for OBCs
3113     o New experiment for test OBCs (internal_wave)
3114     o New output.txt in verification/exp4/results/
3115     o Updates for KPP: calculation of viscosity corrected, new variables
3116       kpp_dumpFreq and kpp_taveFreq
3117     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
3118       and entry for T90 in genmake
3119    
3120    checkpoint29
3121     o packaged KPP and GM/Redi
3122    
3123    checkpoint28
3124     o Corrected initialization of hFacMin for difference vertical coordinates
3125     o Modified calculation of partial cell thickness to more robust algorithm
3126     o config_summary.F: replaced write_1D_... by write_0D_...
3127       read_write.F: added subroutines write_0D_...
3128     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
3129       included some initialisations required for TAMC.
3130     o routine calc_isoslopes: modified sqrt computation to make it
3131       differentiable for zero argument.
3132     o routines dynamics, impldiff:
3133       included store directives and tape key computations required for TAMC.
3134     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
3135    
3136    checkpoint27
3137     o fixed calc_isoslopes() to so that cancellation of terms in tensor
3138       formulation works properly with variable resolution.
3139     o restructured the calling tree between the_model_main() and dynamics()
3140     o split initialise() into initialise_fixed() and initialise_varia()
3141     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
3142       in new routine ini_psurf()
3143    
3144    checkpoint26
3145     o moved some #ifdef in optional routines to encompass everything
3146       except the argument declarations. This was using up some memory.
3147     o fixed macros like _ADT to work with both versions of Linux cpp
3148     o cleaned up some unused and uninitialized variables
3149       (helps when debugging with strict compile options)
3150     o split up CPP_EEOPTIONS.h into options and macros
3151       (macros are now in eesupp/inc/CPP_EEMACROS.h)
3152     o patch for 2 processor JAM mode
3153    
3154    checkpoint25
3155     o updates for OBCs and NH
3156     o dramatically reduced memory usage
3157     o added "JAM" routines for use on Artic network
3158     o parameterization of convection by implicit vertical diffusion
3159     o added a diagnostic of convective index
3160     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
3161       (this is was partly for OBCs and NH but also in anticipation of
3162        an explicit free-surface option)
3163     o initial state input files for U and V
3164    
3165    checkpoint24
3166     o Removed some spurious "REAL"s
3167     o Updated KPP to latest version from JPL
3168     o Added a COS(latitude) in horizontal viscosity
3169    
3170    checkpoint23
3171     o Added del^4 diffusion for salt and temperature
3172     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
3173    
3174    checkpoint22
3175     o Made many small changes: implicit none, format(i5), etc...
3176     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
3177    
3178    checkpoint21
3179     o Introduced new I/O package that supports direct-access records (mdsio.F)
3180     o Split-up mid-level I/O routines
3181     o Updated input data for experiments 0,1,2,4 and 5
3182     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
3183    
3184    checkpoint20
3185     o Tidied up open-boundaries some more
3186     o Added non-hydrostatic code
3187     o Fixed some input data
3188     o Modified MPI start-up to work in "coupled" context.
3189    
3190    checkpoint19
3191     o Tidied up directory structure for verification experiments.
3192     o Added new code for open boundaries.
3193     o Corrected advective terms near boundaries.
3194     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
3195     o Implemented free-slip/no-slip BCs and del^4 dissipation.
3196     o Split default parameters out of ini_parms.F into set_defaults.F.
3197    
3198    checkpoint18
3199     o Further changes for optional code generation with
3200       CPP - ugh!
3201    
3202    checkpoint17
3203     o Beginning to incorporating modularity
3204       for supporting atmos. and ocean configs.
3205     o Small changes for TAMC complinace
3206     o New ultra simple test case. Barotropic box
3207       configuration "exp0".
3208    
3209    checkpoint16
3210     o Minor changes to exchange routines to support
3211       accumulation in reverse mode. Adjoint of an
3212       assignment is an addition.
3213     o Changes to support compilation by TAMC (LR(1)
3214       syntax) and by g77 under Linux ( 72 character
3215       limit ).
3216    
3217  checkpoint15  checkpoint15
3218   Rewrote exchange routines to allow   Rewrote exchange routines to allow
3219   o General tile <-> tile connectivity.   o General tile <-> tile connectivity.

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