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revision 1.34 by heimbach, Tue Jan 30 20:51:26 2001 UTC revision 1.429 by dimitri, Mon Dec 27 20:34:11 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
7    o added pkg/seaice/seaice_monitor.F
8    o mdsio_readfield.F can now read files visible only to master MPI process.
9    o pkg/seaice: some test code for ice-modified ocean stress
10    o exf_getffields interpolation defaults to bilinear for all scalar forcing
11      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
12      spurious negative numbers for precipitation and humidity.  Will cause
13      some small numerical differences for integrations using pkg/exf/exf_interp.F.
14    
15    checkpoint57b_post
16    o simplify options in diagnostics_fill arguments (remove weird combinations)
17    o fix MNC coordinate variables so that they now contain per-face index
18      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
19      general, EXCH2 grids are only aligned to a "local" coordinate system
20    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
21    o Implement instantaneous output within pkg diagnostics:
22      setting a negative frequency in data.diagnostics produces
23     "snap-shot" output (as opposed to time-average if freq > 0)
24    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
25      NOTE: change ptracer diagnostics name: use 2 characters to work with
26            more than 9 tracers. Add also diagnostics of advect & diffus flux.
27    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
28      becomes the coordinate variable for the 'T' dimension
29    o add CF-style coordinate variables to MNC
30      - just a first cut:  numbers are meaningless on the cubesphere and
31        missing along the T axis but otherwise it works!
32    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
33    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
34    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
35      this is based directly on what the model compute, so that the content of
36      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
37    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
38    o clean up build options files for SunOS, in particular
39      - remove -traditional from xmakedepend
40      - change -xarch=v9 to -xarch=native for f77
41      - restore use of make (not gmake)
42      - add CC=gcc if using g77
43    o changes per discussion of AM, JMC, & EH3 today:
44      - move redundant "grid" variables out of "state" -- in preparation of
45        creating proper CF-style coordinate variables and in recognition
46        that any/all grid variables can be easily copied (eg. w/NCO) from
47        the grid files into any of the other NetCDF files
48      - *always* output grid variables with MDSIO (this will eventually be
49        changed)
50      - output MNC grid file if useMNC is true
51    o every instance of _END_MASTER() has been found and replaced with
52      _END_MASTER( myThid ) in order to satisfy certain picky Sun
53      preprocessors
54    o re-arrange diagnostics pkg initialisation:
55     - allow each package to extend the available diagnostics list
56     - add some checking and fix small problems (multi-threaded, ...)
57     - new S/R diagnostics_fill (replace fill_diagnostics):
58       look through the short list of active diag. (instead of the long list)
59       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
60    
61    checkpoint57a_post
62    o this set of changes restores TAMC compatibility
63      tested for global_ocean.90x40x15 adjoint on trough
64      (what a pain)
65    
66    checkpoint57a_pre
67    o some modifs in tools/build_options for sunos
68    o call ctrl_pack for ctrl at end for optimcycle=0
69    
70    checkpoint57
71    o add horizontal bi-harmonic viscosity for vertical velocity
72      - new parameter viscA4W (defaults to viscA4)
73      - affects only non-hydrostatic code
74      - to be done: no-slip lateral boundary conditions
75    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
76    o implement Implicit Vertical advection for pTracers
77    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
78      (implemented also for implicit vertical diffusion & advection)
79    o OBCS: extend application of tracer open boundary conditions
80      to a strip beyond the boundary of width Olx/Oly
81    o add call monitor to TAF set of required calls (flow directives)
82      and include in natl_box_adjoint
83    o untangle a few ifdefs related to cost, ctrl, autodiff
84      untangel a few ALLOW_ECCO_OPTIMIZATION
85    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
86      (theta2, salt2 in ecco_cost_weights)
87    
88    checkpoint56c_post
89    o OBCS as control variables
90      - update ctrl_ad_diff.list, obcs_ad_diff.list
91      - remove balance of obcs controls from default
92      - fix index bug nobcs in ctrl_init
93      - fix dummy fields filen in ctrl_pack
94      - add dummy weights for obcs
95    o lsopt: comment out fort.94 output
96    o optim:
97      - remove unnecessary header files
98      - adjusted namelists
99      - add xerbla.F to Makefile
100    o exf:
101      - multiple modifications of exf_check_range
102      - unit change in exf_init_runoff from [m/year] to [m/s]
103    o mdsio:
104      - i/o-vector change debugLevel from debLevA to debLevB
105    
106    checkpoint56b_post
107    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
108      is called from DO_THE_MODEL_IO
109      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
110      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
111      - clean up PTRACERS_WRITE_TIMEAVE a little
112    o add another verification experiment that tests both the cfc-pkg and
113      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
114      reactive tendencies treated inline with regular timestepping
115    o testreport previously did a lousy job of comparing small numbers, so
116      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
117      implemented in the little c-progam tmp_cmpnum.c which is embedded in
118      testreport.
119    o ptracers_monitor: bug fix for MPI
120    
121    checkpoint56a_post
122    o GCHEM: finish reorganizating the package
123      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
124        (introduces another 3D-array for each passive tracer, but only if
125        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
126        gchemTendency is not needed because the timestep is done separately)
127      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
128      - GCHEM is now---more or less cleanly---separate from PTRACERS
129      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
130        so clear to me how that should be done in a general way.
131    o CFC: improve formatting of output in CFC_ATMOS
132    o PTRACERS:
133      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
134        that ALL experiments with ptracers enable can be checked. This makes
135        GCHEM_MONITOR obsolete.
136      - include a runtime parameter PTRACERS_monitorFreq that defaults to
137        monitorFreq
138      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
139    o add PTRACERS (PTR0[1-5]) to testreport output
140    o exf_check_range:
141      * default changed to .TRUE.
142      * will check values for niter0 if debLevA, every timestep if debLevB
143      * STOP in exf_check_range if 'out of range'
144      * range chosen generous to allow for potential extema
145      TBD: a version with stricter range
146           permitted range would be runtime parameters
147    o GMredi:
148      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
149      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
150      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
151    o GCHEM:
152      - move call to GCHEM_FORCING_SEP, so that it is now called before
153        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
154      - introduced a useGCHEM runtime flag and applied it everywhere.
155      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
156        this flag is now only visible within GCHEM-pkg routines.
157      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
158        be replaced by a 3D array that is computed before thermodynamics; for
159        this, the tracer ID iTracer had to be included into the parameter list
160        of ptracers_forcing
161      - set up forward_step to call gchem_forcing, that will replace
162        gchem_forcing_int in ptracers_forcing
163      - cleaning up
164    o small cleaning of exch2: remove files that are also in eesupp/src
165    
166    checkpoint56
167    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
168    o mnc: cleanup "full" files--fixes out-of-memory problem
169    o ECCO-GODAE
170      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
171      * fully merged and updated from SIO code
172        windstress sign change affects
173        - exf_inscal_[u/v]stress
174        - sign of xx_tau[u/v] adjustments
175        - signs in cost_scat
176      * ctrl_get_gen: avoid update of tau[u/v] for first few days
177      * natl_box_adjoint updated and compressed
178      * 2-level checkpoint switch added
179        (tested in EXP. 1 of natl_box_adjoint)
180      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
181    o SVD
182      * first complete, non-hacked version for SVD calculations
183      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
184        performed via direct access files admtlm_vector.it????
185        (via ctrl_[un]pack)
186      * optimcycle is used for ARPACK iteration counter
187        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
188      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
189        and add linear transforms where necessary
190      * controls are initial/final SST, SSS (can be extended; need to check
191        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
192    o mdsio: filename info to both stderr, stdout
193    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
194      from sign change
195    
196    checkpoint55j_post
197    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
198      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
199    o add consistent build directories and .cvsignore files to verification
200    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
201    o make all subroutines 30 or less characters in length for certain older
202      compilers to work (a thorough search only turns up two routines in
203      pkg/ptracers)
204    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
205      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
206    
207    checkpoint55i_post
208    o change arrays for total vertical diffusivity (2.D if explicit,
209      3.D if implicit) ; each ptracer uses its own background value.
210    o added mnc/NetCDF output capability to ocn_compon_interf
211      - added bits to verification/cpl_aim+ocn so that it can run on
212        ITRDA and other clusters without the mpirun "-wd" option
213    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
214      configuration
215    o give MNC the ability to create additional files rather than
216      exceeding a specified file size limit "MNC_MAX_FILESIZE"
217      - the default is just less than 2GB which is a practical limit
218        on many systems
219    o Compute the non-local term using either KPP vertical diffusivity (=default)
220       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
221    
222    checkpoint55h_post
223    o add verification test "vermix"
224    o remove all the *_ioinc flags and replace with the single global
225      outputTypesInclusive flag
226    o allow to set a vertical profile of vertical diffusivity for T & S
227    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
228    o useMNC moved from data.mnc to data.pkg
229    
230    checkpoint55g_post
231    o Renaming carbon AD experiments to comply with testreport conventions
232    o Updating adjoint of Held-Suarez hs94.1x64x5
233    o Fixing directives for non-ECCO forward_step, after ECCO directives
234      have been fixed to avoid recomp. of do_oceanic_phys
235      Works well for global_ocean.90x40x15,
236      but recomp. issue remains for carbon
237    o Updating adjoint output for natl_box_adjoint after
238      pkg/ecco has been modified (see taga c55d_post)
239    
240    checkpoint55f_post
241    o rename to timeave_init_fixed
242    
243    checkpoint55e_post
244    o some delicate re-shuffle of store directives to avoid one
245      extra call of do_oceanic_physics
246      affects ecco_the_main_loop.F, do_oceanic_physics.F
247      checkpoint_lev1_directives.h
248    o NB: this may break global_ocean adjoint temporarily,
249      but it is clear how to fix it. Will do later, need this now.
250    
251    checkpoint55d_post
252    o ECCO specific cost function terms (up-to-date with 1x1 runs)
253    o ecco_cost_weights is modified to 1x1 runs
254    o modifs to allow observations to be read in as
255      single file or yearly files
256    o enable to read exf forcing fields as either
257      single file or yearly files (flag useExfYearlyFields)
258    checkpoint55d_pre
259    
260    o switch between 2-level and 3-level checkpointing
261    o add ability of MNC to write local and "partial" (eg. 2D slices where
262      the full 3D field is never actually stored) arrays to NetCDF files
263      with the correct (that is, the complete multi-dimensional) set of
264      array indicies
265      - used in mom_vecinv() to write the diagFreq output
266      - tested (demonstrated) in verification/aim.5l_cs
267    o further mnc-ification
268      - add verification/lab_sea to the list with mnc setups
269      - fix undefined mnc v-names in cd_code
270      - add kpp to mnc output (both snapshot and timeave)
271    o non-hydrostatic code
272      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
273        in calc_gw.F
274      - defaults to viscAh
275      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
276        friction or Leith) in non-hydrostatic mode, as long as there is
277        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
278    o pkg/cost
279      extend simple cost functions to treat time mean quantities
280      (T,U,V) via cost_accumulate_state from cost_tile
281    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
282        be 2 times larger than the minimum size the advection scheme requires.
283        now get a perfect conservation of salt in advect_cs test-exp (updated)
284    o GGL90 (Gaspar's TKE mixed layer)
285      - add horizontal diffusion of TKE, requires exchanges in
286        do_fields_blocking_exchanges, horizontal diffusivity is zero by
287        default. In OPA there is no horizontal diffusion of TKE but the
288        mixing coefficients are computed from a horizontal average of TKE of
289        6 points or so. I think that diffusion has a little more physical
290        justification.
291      - clean up ggl90_calc in the hope of reducing memory usage (this hope
292        was in vain)
293      - mask tke-variable in ggl90_init
294    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
295    o fix biharmonic diffusion on CS-grid.
296    o more obcs stuff
297      - added obcs_external_fields_load as an alternative to the EXF-pkg option
298        for reading boundary values. This routine is called from
299        obcs_prescribe_read
300      - updated obcs_check
301      - changed sponge layer relaxation parameter units for days to seconds
302      - turned off sponge layer by default
303      - changed argument list of OBCS_CALC to myTime+deltaTclock
304      - fixed about 35 bugs in obcs_external_fields_load
305    
306    checkpoint55c_post
307    o obcs stuff
308      - new runtime flags useOBCSprescribe, useOBCSbalance
309      - re-arranged obcs_calc
310      - moved exf_getobcs to obcs_prescibe_read
311        obcs_prescibe_read is called after ORLANSKI stuff
312        and independent of it (executable can contain all).
313      - updated obcs_check
314      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
315        These may be necessary only if tangential velocities are
316        prescribed at OB, not sure, needs testing.
317    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
318      which simplifies the calls and passes the ifc check-bounds test
319    
320    checkpoint55b_post
321    o add a 2D scalar, Z location, exchange_2 routine.
322    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
323      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
324      affects advect_cs results (for the wrong reason): update output.txt
325    o use a more standard discretization for biharmonic viscosity ;
326     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
327      affects results of dome set-up: update output.txt
328    o fix gad_advection.F (CubedSphere part), back to version 1.23
329    o fix bug in mom_vi_del2uv.F (CubedSphere part).
330    
331    checkpoint55a_post
332    o merged code to
333      * prescribe/read time-dependent open boundaries
334        (works in conjunction with exf, cal)
335      * sponge layer code for open boundaries
336      * each boundary N/S/E/W now has its own CPP option
337        (healthy for the adjoint)
338    
339    checkpoint55
340    o up-to-date adjoint of previous breaks
341      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
342      - global_ocean_ebm: adjoint still needs fix (TLM ok)
343      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
344      - carbon: * remove tr1-related adjoint verification
345                * add ptracer as control variable
346    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
347      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
348    
349    checkpoint54f_post
350    o in verification/carbin/ remove experiment related to
351      ALLOW_PASSIVE_TRACER (array tr1 etc)
352      code_ad/ input_ad/ results_ad
353    
354    o add two new packages
355      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
356        + subject to optimization (memory)
357      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
358        + subject to reordering (many GOTOs in the original code)
359        + so far opps is called for every (i,j) point, and then operates in
360          the vertical; one may want to reorder the scheme in order operate in
361          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
362          fields)
363    o overhaul of IO so that we now have flags for MDSIO and/or MNC
364      - all verification tests compile and run with linux_ia32_g77
365      - defaults are compatible with current input files--nothing
366        should change if you were not previously using MNC
367      - MNC output has been added in numerous places (eg. timeave)
368        but there are still a few writes not yet do-able with MNC
369        (this is in progress)
370      - flags now allow for either/or/both use of MDSIO and MNC and
371        documentation will soon follow
372      - numerous small formatting cleanups for ProTeX
373    o add version info (via BUILD_INFO.h) to MNC and stdout
374    
375    checkpoint54e_post
376    o add two new packages
377      - pp81 (Packanowski and Philander, 1981), Richardson number and
378        stratification dependent mixing
379      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
380      - these scheme operate in a similar manner as KPP (without ghat, of
381        course), however there is only one diffusivity that is used for both
382        temperature and salinity (and passive tracers)ç
383    o add offline package
384    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
385      provided by Stephanie Dutkiewicz
386    o genmake2: add ability to search for C compilers and cleanup test output
387      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
388    
389    checkpoint54d_post
390    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
391    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
392      leading to additional shift by 5 days each year of integration
393       (i.e. leading to considerable offset over the years)
394    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
395    o start with no AB and no initial filtering (staggerTimeStep):
396      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
397    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
398      (external loading & cpl import/export stay in forward_step.F)
399    o update coupling interface to work with new staggerTimeStep
400    o change MDSIO ptracers_pickup.
401    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
402    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
403    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
404    
405    checkpoint54c_post
406    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
407      this affects (truncation error) output.txt of test-exp:
408       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
409    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
410    o change Qnet to always be the net heat flux, (+upward).
411      affects (truncation error) output of natl_box exp.: updated
412    o define the max number of passive tracers in PTRACERS_SIZE.h
413    o start to test mnc routinely in exp0
414    o add sea-ice loading (sIceLoad) as a new forcing field.
415    
416    checkpoint54b_post
417    o add testreport "-j JOBS" option for parallel builds (tested and pretty
418       impressive on Altix and Opteron systems)
419    o diagnostics can now write NetCDF files through the mnc package
420    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
421    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
422    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
423      affects (truncation error) output of lab_sea & natl_box exp.: updated
424    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
425    
426    checkpoint54a_post
427    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
428    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
429    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
430    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
431      + internal_wave (shift in writing cg2d_ini_res)
432    checkpoint54a_pre
433    
434    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
435      - modified verification/lab_sea and natl_box_adjoint accordingly
436    
437    checkpoint54
438    checkpoint53g_post
439    o prepare splitting of thermodynamics: store convect.counter in common block
440    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
441      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
442    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
443    o new parameter "nShapS": allow to treat differently S from T (nShapT)
444    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
445    o restore adjointability
446    
447    checkpoint53f_post
448    o modifications that affect AIM experiment results (update output.txt):
449      - no advection of S at top interface Nr (pkg/generic_advdiff)
450      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
451    o AIM pkg:
452      - include stability function into surf.Flux derivative relative to Tsurf
453      - calculate clear-sky radiation & surface temp. change (for diagnostics)
454    
455    checkpoint53e_post
456    o merged cylindrical coord configuration
457    o added rotating_tank experiment
458    checkpoint53e_pre
459    
460    checkpoint53d_post
461    o faulks upgraded: re-generate output.txt that have changed:
462       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
463    o Added Bryan and Lewis, 1979, vertical diffusivity profile
464    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
465    o added Sadourny discretization of Coriolis
466      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
467      - re-enabled use of omega3 (useAbsVorticity)
468    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
469      vector-invariant equations
470      - note: does *NOT* yet use same variable visc. for no-slip BC's.
471    o recoded the lateral boundary conditions for non-hydrostatic w, this time
472      hopefully without new bugs
473      - still to do: biharmonic friction for non-hydrostatic w
474    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
475    o regenerated output for global_ocean_ebm (using -ieee)
476    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
477      of mom_common/
478      - simple re-arrangement of instructions within computing loop
479    checkpoint53d_pre
480    
481    checkpoint53c_post
482    o new version of coupler for AIM+thSIce and Ocean models
483     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
484     - land: change Evaporation of snow
485     - aim with thSIce: fix bug in snow-precip.
486    o changes to calc_gw.F
487     - bug fix for w^2 term near the bottom boundary
488     - (hopefully) improve the lateral slip boundary condtions for use with
489        partial/looped cells
490      - because the bug fix changes two verification experiments anyway (exp5
491        and plume on slope), change the lateral boundary condition from half slip
492        to the value of no_slip_sides
493    o ebm package wasnt quite up to the parallel task. Fixed that.
494    o Adjoint of EBM package + verification
495      * TLM OK
496      * ADM not sufficient accuracy yet (needs further testing)
497    
498    checkpoint53b_post
499    o Commiting new energy balance model to repository
500      * package is pkg/ebm
501      * verif. is verification/global_ocean_ebm
502      * references are in ebm_driver.F
503    C      * X. Wang, P. Stone and J. Marotzke, 1999:
504    C        Global thermohaline circulation. Part I:
505    C        Sensitivity to atmospheric moisture transport.
506    C        J. Climate 12(1), 71-82
507    C      * X. Wang, P. Stone and J. Marotzke, 1999:
508    C        Global thermohaline circulation. Part II:
509    C        Sensitivity with interactive transport.
510    C        J. Climate 12(1), 83-91
511    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
512    C        Destabilization of the thermohaline circulation
513    C        by atmospheric eddy transports.
514    C        J. Climate 7(12), 1870-1882
515    o Will need long integration testing.
516    checkpoint53b_pre
517    
518    o created pkg/mom_common in preparation for variable viscosity code
519    o renamed and split ini_mnc_io
520    o pkg/land: only liquid water can diffuse or run-off
521    o AIM using land: soil wetness availability account for snow
522    o added printMapIncludesZeros to EEPARMS namelist
523    
524    checkpoint53a_post
525    o restore TAMC compatiility for exf_constants.h
526      (no usage of _d in .h)
527    o Additional storing in KPP in an attempt to fix
528      TAMC problem with adjoint of KPP code.
529      (no success...)
530      Identical code works fine with TAF.
531    o Fixed verification/natl_box_adjoint experiments.
532      Initial conditions for Experiments 4 and 5 are now
533      set to "SEAICE_initialHEFF=0", which is more reasonable,
534      and hence gives results closer to that of Experiment 2.
535      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
536    
537    checkpoint53
538    o stable checkpoint with up to date adjoint
539      TLM tests only run for 1st grdchk at the moment. Its unclear if
540      this is a code problem or a problem with resetting code for g_
541      variables that is being autogenerated wrong.
542      Otherwise:
543       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
544       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
545         are both still in chaos following their security messes.
546    
547    checkpoint52n_post
548    o various build (mostly genmake2) changes including:
549      - ability to build/run more easily within Cygwin and MacOS X
550      - more complicated Makefiles with a stronger dependence on Gnu Make
551    o pkg/seaice modifications
552      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
553        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
554        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
555      - changed proxy for geostrophic velocity and updated
556        verification/lab_sea/results/* accordingly
557      - removed ADI dynamic solver from pkg/seaice
558      - replaced all occurrences of 1/CSTICE or 1/CSUICE
559        they caused a segmentation fault under certain circumstances
560      - removed unused field WATR
561    o bug fix in exf-package:
562      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
563         now reflect that.
564    o small fixes in the cal-package:
565      - set reference date to first of January for the 'model'-calendar
566      - failing of cal_CheckDate in cal_FullDate now actually results in a
567        warning
568    o small modifications in exf-package to increase flexibility:
569      - change climtempfreeze from a constant to a runtime parameter that
570        is specified in data.exf_clim (default = -1.9)
571      - introduce runtime parameter windstressmax (default = 2.0) that is
572        specified in data.exf
573    o fix in pkg/thsice:
574      - update Evap (Tsf changes) to be consistent with Latent heat flux
575      - maintain snow precipitation unchanged (even if Tsf >=0).
576     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
577    
578    checkpoint52m_post
579    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
580      this does not change any of the results, because myIter=0 in swfrac always
581      lead to jwtype=2 (the default anyway), but the call makes little sense
582      as a default
583    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
584    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
585      atmospheric model (AIM) to use it ; add a "slab ocean" component.
586    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
587    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
588    o extending useSingleCpuIO option to work with new exch2 I/O format
589      - old-style, missing-tile I/O is still accessible by defining CPP
590        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
591    o monitor package can write to NetCDF files and/or STDOUT
592    o fix re-definition bug in MNC_GRID_INIT_ALL()
593    o doc/api_reference added
594      - a framework for building an API Reference Manual using all
595        the "protex" comments embedded in the code
596      - see pkg/generic_advdiff, pkg/mnc for examples
597    o MNC:
598      - make myThid the last argument for all subroutines
599      - new default for the grid files: NO halos
600      - add useMNC and other run-time flags
601      - separate per-file-group handling of the unlimited dimension
602      - early initialization of MNC w/ flags read at the eeboot stage
603        and lookup tables set in initialize_fixed
604      - write all MNC output to a freshly-created directory
605    o thermodynamics sea-ice (thsice) is now tested with testreport.
606    o test exp. advect_cs: use the standard cs32 grid ; update output.
607    o Added functionality to grdchk:
608      pick global i,j,k position (or nearest wet) where to perform check.
609    
610    checkpoint52l_post
611    o new land formulation:
612      a) use ground enthalpy as prognostic variable to ensure exact
613         energy conservation.
614      b) account for water temperature and for latent heat of freezing
615         in all processes (rain, run-off, ground storage)
616      c) compute surface and ground temperature implicitly.
617    o aim_v23 modification for new land model:
618      a) Treat separately land / ocean / sea-ice surface fluxes
619         to allow implicit computation of land & sea-ice surface temp.
620      b) add snow precipitation.
621    checkpoint52l_pre
622    
623    o fix problem (when 1 tile is empty) in min/max monitor.
624    o fix bug in timeAve (u,vZetatave in common block)
625    o no restoring terms under ice for pkg/seaice
626    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
627    o bug fix for pkg/seaice pickups
628    o change MNC call locations and add coordinate attributes
629    o mask vorticity at the corner ; affects global_ocean.cs output
630    o fix ini_curvilinear_grid ; test CS experiments with mpi
631    o aim.5l_cs: modify sea-ice fraction input file ; update output
632    o exf: Adding simple range check routine for exf fields after read
633    
634    checkpoint52k_post
635    o removed top-level directory "diags"
636      - we migrated these functions to pkg/timeave a long time ago
637    o fixed bug introduced in pkg/monitor
638    o accuracy ctrlprec = 32 insuffient for gradient checks using
639      averaged fields (I/O via cost_averages)
640      -> use ctrl.h in active_file*.F to control I/O precision.
641    o paramter list of CALL ADTHE_MAIN_LOOP
642    o added initial do_the_model_io to ecco
643    o set all ...Freq to zero after cost_final
644      taveFreq, dumpFreq, pChkptFreq
645    o MAIN and ECCO differentiability restored
646    
647    checkpoint52j_post
648    o fix nchklev in tamc.h for global_ocean...
649    o Bringing flow and store directives up-to-date
650    o Really weird thing!
651      call do_the_model_io from the_main_loop with parameters
652      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
653      TAF places a faulty re-call of initialise_varia
654      after cost_final call which should not be there!
655    checkpoint52j_pre
656    
657    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
658      error messages
659    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
660    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
661      debug output
662    o modfied mdsio_writefield.F to handle non-global files under exch2
663    o update AIM Cubed-Sphere exp (aim.5l_cs):
664      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
665    o update AIM Equatorial Channel exp:
666      use standard aim_v23 pkg and change the SST fields to be more realistic.
667    o globalFile now works with exch2
668    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
669      mon_vort3.F to make exch2 friendly with >1 tile per cube face
670    o limit timeave output for hi-res integrations
671    
672    checkpoint52i_post
673    o removed CPP_EEOPTIONS.h from verification/*/code
674    o updated the tiling for global_ocean_pressure
675    checkpoint52i_pre
676    
677    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
678      the old pkg/aim).
679    
680    checkpoint52h_pre
681    o shortened offending lines in exch2_send_rx?.template
682    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
683    o genmake2: add build & execute test for NetCDF code
684    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
685      old grid files, moved CPP_EEMACROS.h to pkg/exch2
686    o added useSingleCPUIO flag to monitor.F and mon_out.F
687    o added temporary hack for sea-ice dynamics on the cube:
688      metric terms are ignored and it is assumed that
689      there is no sea-ice on cube faces 1, 2, 4, and 5.
690    
691    checkpoint52f_post
692    o added exch2 cube routines to pkg/exch2
693    o modified hs94.cs-32x32x5 to use it
694    o added new grid files to hs94.cs-32x32x5
695    checkpoint52f_pre
696    
697    checkpoint52e_post
698    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
699      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
700    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
701      to work with implicit vertical advection and AB ;
702    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
703    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
704     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
705    checkpoint52e_pre
706    
707    o fix bug in impldiff when Nr=1 or Nr=2.
708    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
709    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
710    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
711      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
712    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
713    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
714    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
715    
716    checkpoint52d_post
717    o re-tiled many expts to allow comparison in multi-processor mode
718      - updated output accordingly
719      - changed hs94.128x64x5 to use intial T from file rather than use the
720        random number generator
721    o add infrastructure in model routines for fizhi and gridalt packages
722    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
723    o changes to permit hi-res, cubed-sphere, configuration
724      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
725      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
726      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
727        of surface winds for the cube
728      (A verification experiment, based on global_ocean.cs32x15, but with
729       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
730       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
731       complete with example surface forcing files and matlab scripts to look
732       at the output and compare it with that of global_ocean.cs32x15.)
733    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
734       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
735       to conform to the common rule.
736    o check-in the first version of the coupler + interfaces for multi-components
737       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
738       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
739       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
740       - ocean and atmos. share the same horizontal grid (no interpolation).
741       - exchanges between component and coupler is done in forward_step
742    o new verification experiment, cpl_aim+ocn:
743       coupled ocean - AIM atmosphere on cs32 grid.
744    
745    checkpoint52d_pre
746    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
747    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
748    
749    checkpoint52c_post
750    o Fixing OPTIONS files for use of exf:
751      - ALLOW_ECCO not needed
752      - ECCO_CPPOPTIONS.h should not be included from
753        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
754        as has been the case in the past
755      - All cal/exf related options are currently set in
756        single header file. Should remain so until we
757        agree on a consistent new policy.
758    o Removed all CPP options for cal package.
759      cal has no more CPP options.
760    o modified STOREs in GAD_ADVECTION
761    o corrected key comp. for passkey
762    
763    checkpoint52b_post
764    o new version: "thsice" of thermodynamic sea-ice pkg:
765     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
766     - modify fluxes but do not change theta directly;
767     - light cleaning of bulk_force pkg (still needed with thsice).
768     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
769       + output_thsice.txt to test thsice & bulk_force pkgs.
770    o put back grid & coriolis monitor output.
771    checkpoint52b_pre
772    
773    o call "do_the_model_io" at the beginning (=> dump initial state)
774    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
775    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
776      (need info on NUMBER_OF_PTRACERS)
777    o missing PTRACERS headers in some routines
778    o default tamc.h in pkg/autodiff supposed to crash
779      to ensure proper customization
780    
781    checkpoint52a_post
782    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
783      - moved surfaceTendencyTice from pkg/seaice to main code
784      - subroutine FREEZE_SURFACE now limits only surface temperature
785        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
786        => new output.txt for global_ocean.cs32x15 & global_with_exf
787      - keep the old version of FREEZE for backward compatibility;
788        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
789      - corresponding modifs for TAF directives
790    o added surface flux output variables to TIMEAVE_STATVARS
791    o time-averaged output for pkg/ptracers
792    o fix problem with ECCO-related divided adjoint
793      snapshot file was missing some ad-variables,
794      but no warning issued by TAF
795    
796    checkpoint52a_pre
797    o some bug fixes for #undef REAL4_IS_SLOW
798    
799    checkpoint52 = ecco_c52_e35
800    o after testing adjoints of checkpoint51u_post
801    
802    checkpoint51u_post
803    o this is the post-merge tag of the ecco-branch
804      (needs another clean checkout and re-testing)
805    o various natl_box_adjoint configs and results
806      but no input fields
807    o obcs adjoint not yet merged!
808    o adding ECCO global 1x1 and 2x2 degree configs
809    o updated/extended some store directives for seaice
810    o pkg/ecco now containes ecco-specific part of cost function
811    o top level routines the_main_loop, forward_step
812      supersede those in model/src/
813      previous input data.cost now in data.ecco
814      (new namelist ecco_cost_nml)
815    o in ctrl/ cleaned some cross-dependencies and updated CPP options
816    
817    checkpoint51t_post
818    o this is the pre-merge tag of the ecco-branch
819    
820    checkpoint51s_post
821    o cleanup: removed various obsolete #define-s
822    o pkg/grdchk
823      - renamed 'ph-grd 3' to 'grad-res'
824      - merged from ecco-branch
825        (remaining bug fixes for obcs gradient checks)
826      - additional high-precision output for testreport
827        (grep for 'precision_grdchk_result')
828    
829    checkpoint51r_post
830    o cleaned up or removed CPP_OPTIONS.h files
831    o updated results for some of the tests to reflect the new
832      optfiles (-ieee: -O0 instead of -O3)
833    
834    checkpoint51q_post
835    o cd_code:
836      - moved cd_scheme.F -> cd_code_scheme.F
837      - separate read_checkpoint from cd_code_ini_vars.F
838      - separated cd_code part from write_checkpoint
839      - updated AD_SOURCE, generated .flow
840      - added CD_CODE_VARS.h to the_main_loop
841      - Moving cd_code specific store dir.s to pkg/cd_code
842    o ctrl package totally restructured
843      - pack/unpack now optional and decoupled from
844        xx_/adxx_ I/O
845      - ctrl_pack/unpack cleaned
846        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
847      - confined inclusion of AD_CONFIG.h to where necessary.
848    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
849    
850    checkpoint51p_post
851    o create initial cd_code package
852      - WARNING: the initialization of fields within packages
853        is broken because INI_FIELDS (where READ_CHECKPOINT is
854        called) is called *before* PACKAGES_INIT_VARIABLES.
855        This seems to be backwards since
856        1) its important to initially zero the entire field including
857           the "halo" region
858        2) zeroing needs to be done *before* reading pickup info
859           and the pickup call might or might not happen in any
860           particular run
861      - this needs an overhaul for R2
862    o cleanup verification/*/code/GMREDI_OPTIONS.h
863    o cleanup testreport
864    
865    checkpoint51o_post
866    o bringing AD-related verif's up to date with genmake2
867      - carbon/
868      - global_ocean.90x40x15/
869      - hs.94.1x64x5/
870      - (front_relax/ )
871    o (more) consistent directory structure for AD-related verif.'s
872    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
873    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
874    o bug fix in find_alpha.F for MDJWF:
875      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
876        change rho -> rho-rhoConst
877      - replace call find_rho to find_rhonum
878    o initialisation of rFlx extended to full array (required by TAF)
879      and shifted to thermodynamics
880    o removed PTRACERS.h in ptracers routine
881    o added surfacetendencyPtr to S/R parameter list pracers_forcing
882    o Correcting initialisations for fVerU, fVerV.
883    o helping TAF to recognize dependency on kUp for
884      fVerU, fVerV
885    o Replacing delZ by delR in pkg/ctrl/
886    checkpoint51o_pre
887    
888    o undid all of cp51 pending some cleanups and discussion
889    o added the [#include "AD_CONFIG.h"] statement to all files that need
890       it for adjoint/tl #defines
891     o re-worked the build logic in genmake2 to support AD_CONFIG.h
892     o removed tools/genmake since it no longer works
893    
894    checkpoint51n_post
895    o modifications to make FREEZE flux visible to pkg/kpp
896      - moved surfaceTendencyTice from pkg/seaice to main code
897      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
898      - subroutine FREEZE now limits only surface temperature
899        (this means new output.txt for global_ocean.90x40x15,
900         global_ocean.cs32x15, and global_with_exf)
901    o added surface flux output variables to TIMEAVE_STATVARS
902    
903    checkpoint51n_pre
904    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
905    o added [#include "AD_CONFIG.h"] to all files that use the following
906      defines:
907      - ALLOW_ADJOINT_RUN
908      - ALLOW_TANGENTLINEAR_RUN
909      - ALLOW_ECCO_OPTIMIZATION
910    
911    checkpoint51m_post
912    o incorporating changes to get TAMC/TAF working in genmake2
913      - added new TAMC/TAF targets to the Makefile
914      - various cleanups related to package handling
915      - these changes should have no impact on the forward model
916    
917    checkpoint51l_post
918    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
919     - faster algorithm for cal_addtime.F
920     - higher precision arithmetic, where needed
921     - pkg/exf *startdate variables changed from calendar date to
922       model integration time
923    
924    checkpoint51l_pre
925    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
926    o enable to apply restoring on S & T only in a latitude band.
927    o update output (external_forcing_surf modif. change truncation errors)
928       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
929    
930    checkpoint51k_post
931    o change default to: useNHMTerms=.FALSE.
932     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
933       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
934     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
935        exp1, ideal_2D_oce
936     - change data file of oceanic exp (leave the results unchanged for now)
937       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
938    o set gravitySign automatically according to the vertical coordinate used
939      (and change sign: back to "logical" value: +1 when R increases downward)
940    o added an include barrier to the default CPP_OPTIONS.h and
941      removed the #include "PACKAGES_CONFIG.h" from it
942    o fix a bug in mom_fluxform (from chk51j_post)
943    
944    checkpoint51j_post
945    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
946    o adjusted some flow directives (dynamics, thermodynamics)
947    o added cubed-sphere case to test cost function
948    o heckpoint_lev?_directives.h now include
949      pkg-specific directives, whenever those are enabled.
950    o Moving pkg-specific flow directives to corresponding pkg
951      Moving pkg-specific differentiation list to corresponding pkg
952      Moving pkg-specific checkpoint-lev storing to corresponding pkg
953      ---> conventions are
954           - pkg_ad.flow
955           - pkg_ad_diff.list
956           - pkg_ad_check_lev?_dir.h
957    
958    checkpoint51i_post
959    o merge of the branch-genmake2
960      - knowingly breaks the older genmake
961      - automatic generation of all ALLOW_${PKG_NAME} defines
962      - new testreport supersedes older testscript
963    o large number of package inclusion and header cleanups
964    checkpoint51i_pre
965    
966    o new output for adjoin of global ocean vector invariant
967    o fix for checkpoint of thermodynamic seaice and bulk_force
968    o Steph gchem various cleanups
969    
970    checkpoint 51h_pre
971    o fixed some single quotes
972    o modify gchem pkg to be more versatile
973    o modifications to clean up dic pkg
974    o add pkg/cfc
975    
976    checkpoint51g_post
977    o provide links for ARPACK and ADM*TLM
978    o start removing verification/vero/
979    o update AD-related stuff
980      (in particular some IF-statements in model/src/ routines)
981    o adding to verification/global_ocean.90x40x15/ adjoint of
982      vector invariant setup
983    
984    checkpoint51f_post
985    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
986    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
987      of tracer Green's fucntions for ocean inversion project.
988    
989    checkpoint51f_pre
990    o Added on-the-fly spatial interpolation capability
991        "USE_EXF_INTERPOLATION" to pkg/exf.
992      - This is a temporary Cartesian-grid hack until
993        the super-duper ESMF coupler becomes available.
994      - See verification/global_with_exf/README for usage example.
995      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
996        flags and modified pkg/seaice accordingly.
997    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
998        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
999        non-local transport term.
1000    
1001    checkpoint51e_post
1002    o pkg/mom_vecinv:
1003      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1004      - add time-ave diagnostic of vorticity advection.
1005    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1006    o atmospheric geopotential: - include water vapor effect;
1007                                - use p^kappa in p* scaling.
1008    o land pkg: read initial state from files.
1009    o AIM : add stratospheric drag in the upper level
1010    
1011    checkpoint51d_post
1012    o change function ILNBLNK (=> last non-blank char.) to return zero
1013      (instead of the string length) when the string. char is empty
1014    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1015    o modif's to restore TAMC compatibility
1016      - avoid "_d" constructs in PARAMETER declarations
1017      - avoid interrupting lines by comment lines
1018    o Use cluster local disks for purely local I/O
1019      vs. globally visible disks needed for ctrl stuff
1020      (merged from ecco-branch)
1021      - new active_file_loc... and mdsio_..._loc routines
1022      - affected packages: autodiff, ctrl, grdchk, mdsio
1023    
1024    checkpoint51c_post
1025    o introducing integer flag debugLevel
1026      - debLevZero: suppress all output
1027      - debLevA: standard
1028      - debLevB: equivalent to current debugMode=.TRUE.
1029    o introducing pathname variable mdsioLocalDir for mdsio
1030      that can be specified at runtime
1031      (relevant for cluster I/O to local disk)
1032    `
1033    >>>checkpoint51b_post
1034    adjoint of ptracers
1035    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1036    o extended state in checkpoint_lev?, etc.
1037    o alternative ctrl/cost with tr1 or ptracer
1038    o new comlev1_bibj_ptracers
1039    o new ptracers.flow
1040    o made ptracers_forcing same as external_forcing_s
1041    o added verification for adjoint with ptracers
1042      - adm. grdchk fail so far
1043      - tlm. grdchk OK
1044      - checked tapelev/comlev recomputations: OK
1045    <<<checkpoint51b_pre
1046    
1047    checkpoint51a_post
1048    o added code for biogeochemistry package
1049      - new pkgs: dic, gchem
1050      - new subroutine in ptracers
1051    o modify code for biogeo packages
1052      - in model/src and pkg/ptracers
1053    
1054    checkpoint51
1055    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1056      - autodiff, ctrl, exf, grdchk, seaice
1057      kept separate packages
1058      - cost, ecco, obcs
1059    o updating verification/internal_wave, verification/lab_sea
1060      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1061    
1062    checkpoint50i_post
1063    o Preparing next differentiable checkpoint and sync
1064      of MAIN vs. ecco-branch
1065      - 1st step: this one is differentiable
1066      - 2nd step: next(! not this) checkpoint will have updated packages
1067                  from ecco-branch)
1068    
1069    checkpoint50h_post
1070    o new package "land": provide surface BC for AIM.
1071    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1072    o AIM: use true log-P extrapolation for near surface temp (= as in
1073        F.Molteni paper) ; update aim.5l_cs output.
1074    o New variable in PARM03 for more flexible pickups
1075    o somewhat cleaned package initialisation sequence for
1076      ctrl/ cost/ ecco/ in packages_... routines
1077    
1078    checkpoint50g_post
1079    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1080      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1081      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1082        made the default because of faster convergence than ADI
1083    
1084    checkpoint50f_post
1085    o exf totally restructured
1086      - replaced all exf_set_ routines by one generic exf_set_gen.F
1087        and made sure it's still differentiable
1088      - split exf_getffields.F into new exf_bulkformulae.F
1089      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1090      - updated adjoint/makefile and relevant verif. accordingly
1091    
1092    checkpoint50f_pre
1093     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1094          + change Evap over land. (update aim.5l_cs output)
1095     o added missing .cvsignores and made uniform across expts
1096     o changed configuration of tidal_basin_2d expt
1097     o added pkg/debug functions for tracing code in fatal crashes
1098     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1099     o new fn in pkg/monitor to stop model if solution grows too big
1100     o removed lots of single quotes from comments
1101    
1102    checkpoint50e_post
1103    o make KPP work with PTRACERS
1104     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1105       nearly a copy of kpp_transport_s
1106     - there is no analogue to SurfaceTendencyS, so I have to use
1107       gPtr(of the surface layer) instead
1108    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1109    checkpoint50e_pre
1110    
1111    checkpoint50d_post
1112    o change kpp output from multiple-record state files to single-record state
1113      files analogous to write_state.F
1114    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1115      analogous to the cg2d-related output.
1116    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1117      so that writing to internal file fn (with length 512) fails.
1118    checkpoint50d_pre
1119    
1120    checkpoint50c_post
1121    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1122    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1123    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1124    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1125    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1126    
1127    checkpoint50c_pre
1128    Merging from release1_p13:
1129    o bug fix for pkg/seaice dynamic solver
1130    o Added SEAICE_initialHEFF to pkg/seaice
1131    
1132    checkpoint50b_post
1133    o store u*,v* in gU,V instead of in guNm1,gvNm1
1134    o in order to put the momForcing out of the Adams-Bashforth:
1135      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1136      to timestep.F
1137    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1138    o re-generate output for highly sensitive test-exp:
1139       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1140    
1141    checkpoint50b_pre
1142    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1143    o corrected CPP option mismatch in exf_Bulk... functions for case
1144      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1145    
1146    checkpoint50a_post
1147    o Bug fix for merging between c50 and KPP.
1148      ikey was passed from thermodynamics to kpp_calc via
1149      common block rather than being recomputed in kpp_calc,
1150      in contradiction with new key itdkey.
1151      New key ikppkey created, and tamc.h headers updated.
1152    
1153    checkpoint50
1154    - 2nd step of merge with ecco-branch:
1155      merge changes in ecco-branch back into main trunk
1156    - bug fix in find_alpha
1157    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1158    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1159    - merged some sliced AD support routines
1160    
1161    checkpoint49
1162    merged from ecco-branch:
1163    o exf:
1164      - Enable initialisation of forcing fields to constant
1165        (runtime) values.
1166      - in exf_getffields.F
1167        Reduce i-/j-loop to interior domain, discarding overlaps.
1168        That also fixes wrong TAF-key computations for key_1, key_2
1169        with bulf formulae.
1170      - exf_init.F modify #ifdef for exf_init_evap
1171      - exf_getffieldrec.F, ctrl_getrec.F
1172        The following INT-usages are not safe:
1173          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1174          fldcount = int(fldsecs/fldperiod) + 1
1175        and were modified.
1176    o autodiff: checkpoint_lev...
1177      - updated storing for bulk formulae (some arrays were missing)
1178      - added state for seaice package
1179      - synchronized with main branch
1180    o DIVA:
1181      Modif.s in
1182      - the_main_loop.F
1183      - the_model_main.F
1184      and added cost_final_restore.F cost_final_store.F
1185      o With these changes, it is possible to fully separate
1186        the first forward run to compute the cost function (mdthe_main_loop)
1187        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1188        into separate model executions.
1189        This enables better tuning of DIVA to given queue sizes.
1190      o Loss of cost function value in consecutive DIVA runs is
1191        fixed by storing to 'costfinal' file.
1192      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1193        beginning/end of adjoint integration is accounted for.
1194      The current changes apply to TAF-1.4.26.
1195      TAF has one remaining bug, requiring one manual change
1196      (see MITgcm manual).
1197    o cal: synchronized between MAIN and ecco-branch
1198    
1199    checkpoint48i_post
1200    o Changes to restore differentiability of code w.r.t. previous tag
1201      (mostly adding new routines to make list and replacing
1202      pressure by totPhiHyd).
1203    o Updated and merged grdchk package
1204      - has both ADM and TLM checks
1205      - works for single- and multi-proc.
1206      - output cleaned
1207      - worked successfully for parallel DIVA
1208    o genmake:
1209      - Adding -platform=SP4
1210      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1211    o Modif. for DIVA:
1212      ctrl_unpack should not be called in intermediate DIVA interval.
1213      (similar thing would apply for active files such as
1214      tbar, sbar, psbar, which should not be reinitialised;
1215      only relevant for ecco-branch)
1216    
1217    checkpoint48h_post
1218    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1219    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1220    o Added SEAICE_initialHEFF to pkg/seaice
1221    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1222    
1223    checkpoint48g_post
1224    --- EOS:
1225    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1226      store total Potential in totPhyHyd for diagnostics & EOS.
1227    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1228    --- Pressure/geopotential gradient:
1229    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1230    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1231      ( changes results of global_ocean_pressure )
1232    o NLFS + z-coord.: add eta*Rho' contribution.
1233    o accurate phiHyd when using interface-W at the middle between 2 centers
1234     ( changes results of ideal_2D_oce )
1235    o includes r* 2nd term in potential gradient.
1236    
1237    checkpoint48f_post
1238    Merging from release1_p12:
1239    o Modifications for using pkg/exf with pkg/seaice
1240      - improved description of the various forcing configurations
1241      - added basic radiation bulk formulae to pkg/exf
1242      - units/sign fix for evap computation in exf_getffields.F
1243      - updated verification/global_with_exf/results/output.txt
1244    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1245      (SBO) core products, including oceanic mass, center-of-mass,
1246      angular, and bottom pressure (see pkg/sbo/README.sbo).
1247    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1248      to avoid negative values in shallow regions.
1249      - updated verification/natl_box/results/output.txt
1250      - updated verification/lab_sea/results/output.txt
1251    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1252    o Added useSingleCpuIO option (see PARAMS.h).
1253    o Updated useSingleCpuIO option in mdsio_writefield.F to
1254      work with multi-field files, e.g., for single-file pickup.
1255    o pkg/seaice:
1256      - bug fix in growth.F: QNET for no shortwave case
1257      - added HeffFile for specifying initial sea-ice thickness
1258      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1259    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1260      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1261    o pkg/seaice:
1262      - adjoint-friendly modifications
1263      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1264    
1265    checkpoint48e_post
1266    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1267    o dynamics: change definition of computational domain & adapt mom_fluxform
1268      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1269    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1270        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1271        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1272        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1273        inverted_barometer solid-body.cs-32x32x1
1274      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1275    
1276    checkpoint48d_post
1277    o in preparation for r*:
1278     a) use pre-computed gradient of hydrostatic potential:
1279        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1280     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1281        => affects results of glob_oce_pressure (different truncation error)  
1282      update output.txt of ideal_2D_oce & global_ocean_pressure
1283    
1284    checkpoint48d_pre
1285    o in preparation for r*:
1286      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1287      pass the 2 comp. of the grad. as arguments to momentum S/R.
1288      but for the moment, only used if it does not change the results.
1289    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1290    
1291    checkpoint48c_post
1292    Modifications in treatment of initial flux forcing controls
1293    to avoid extra storing of flux fields.
1294    
1295    checkpoint48c_pre
1296    o Added tidal_basin_2d experiment (currently 1D!)
1297    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1298    
1299    checkpoint48b_post
1300    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1301     (modification to pressure gradient not yet implemented)
1302    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1303      (for U & V) that are used for vertical advection of momentum.
1304    
1305    checkpoint48a_post
1306    o In preparation for r*, use temp. array to compute vertical transport
1307       in flux-form momentum pkg. => change results of few test-exp.
1308      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1309                        lab_sea, natl_box & plume_on_slope
1310    
1311    checkpoint48
1312    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1313    
1314    checkpoint47j_post
1315    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1316    o moved adexch from forward_step to addummy_in_stepping
1317    o added exch in ctrl_map_...
1318    o aveFreq.=0. at end of cost_final to avoid overwrite in
1319      reverse checkpointing loop
1320    o Yet more changes in gmredi:
1321      * adgmredi_calc_tensor
1322        avoiding all recomputation of gmredi_slope_limit
1323      * adgmredi_x/y/rtransport
1324        added flag for excessive storing to avoid recomp. of
1325        u/v/rtans, dTdx/y/z
1326        -> this is not really necessary and very memory-consuming
1327      * adgmredi_slope_psi:
1328        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1329      * gmredi_slope_limit
1330        re-activated full calculation of taperfct for case 'ac02'
1331    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1332    
1333    checkpoint47i_post
1334    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1335    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1336      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1337    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1338    o gmredi: fix few bugs.
1339    
1340    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1341    This will be a good checkpoint to plug into the ecco-branch.
1342    o few modif.'s to get latest version adjointed
1343      (mainly kick out code in ini_linear_phisurf)
1344    o modif's to run adjoint with exactConserv
1345    o case GM_BOLUS_ADVEC should be cleaned
1346      S/R gmredi_slope_psi should be cleaned
1347    o verification/carbon now has exactConserv=.TRUE.
1348    
1349    checkpoint47g_post
1350    o time-average AIM output: becomes independent from statvars time-average
1351      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1352    o After TAF bug fix:
1353      Tested adjoint of gmredi package.
1354      Tests were done with checkpoint47 rather than with latest
1355      checkpoint47f_post since the latter is broken for the adjoint
1356      verification/carbon/ contains both ADM and TLM gradient checks.
1357    Here they are, before they get changed/lost/stolen.
1358    Mostly modif.'s to fix numerical sensitivities.
1359    Gradient checks OK for
1360    - GM_taper_scheme:
1361      * clipping
1362      * ac02
1363      * linear
1364      * glw91
1365      * dm95
1366      * ldd97
1367    - GMREDI_OPTIONS:
1368      * GM_VISBECK_VARIABLE_K
1369      * GM_NON_UNITY_DIAGONAL
1370      * GM_EXTRA_DIAGONAL
1371      * GM_BOLUS_ADVEC
1372    in conjunction with data.gmredi parameters to be checked in
1373    in a few minutes under verification/carbon/code/
1374    
1375    checkpoint47f_post
1376    Merging from release1_p10:
1377    o modifications for using pkg/exf with pkg/seaice
1378      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1379        and SEAICE_EXTERNAL_FLUXES
1380      - pkg/exf CPP options EXF_READ_EVAP and
1381        EXF_NO_BULK_COMPUTATIONS
1382      - usage examples are Experiments 8 and 9 in
1383        verification/lab_sea/README
1384      - verification/lab_sea default experiment now uses
1385        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1386    
1387    checkpoint47e_post
1388    o created a tag prior to creating a branch
1389    
1390    checkpoint47d_post
1391    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1392      at the bottom boundary had an erroneous half slip boundary condition
1393    o added bottom drag and no slip boundary condition capabilities to
1394      oceanic pressure coordinates code
1395    o added new verification experiment global_ocean_pressure, this experiment is
1396      also described in the tutorial section of the manual
1397    checkpoint47d_pre
1398    
1399    checkpoint47c_post
1400    o Added a verification experiment for a global cubed-sphere ocean run
1401      -  verification/global_ocean.cubed32x32x30
1402      -  uses pkg/therm_seaice and pkg/bulk_forcing
1403    
1404    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1405    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1406      when using P-coordinate; only implemented for atmospheric config.
1407    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1408      NOTES: requires option NONLIN_FRSURF to be "#define".
1409    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1410    
1411    checkpoint47b_post
1412    Merging from release1_p9:
1413    o pkg/seaice
1414      - removed GOTO's and added taf directives
1415      - double precision constants to reduce the g77 (Linux)
1416        to F77 (SGI) differences reported in release1_p8
1417    o tools/genmake
1418      - added SGI options
1419    o verification/testscript
1420      - updated to that of checkpoint47a_post
1421    o verification/global_ocean.90x40x15/input/eedata
1422      - modified for SGI f77 compatibility
1423    o verification/lab_sea
1424      - added description of sea-ice model
1425      - added missing matlab routines
1426      - added test of thermodynamics parallelization
1427    
1428    checkpoint47a_post
1429    o new pkg: aim_v23
1430     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1431       for now, keep the same surface forcing as before.
1432     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1433     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1434     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1435    o add diagnostic of surface correction term in monitor output
1436    
1437    o bulk_force and therm_seaice
1438    - Two packages:  bulk_force (Bulk forcing)
1439      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1440    - Earlier integration from Stephaine Dutkiewicz
1441      and Patrick Heimbach.
1442    - Two ifdef statements for compile time,
1443       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1444    
1445    checkpoint47
1446    differentiable version of checkpoint46n_post
1447    o bug fix in quasihydrostaticterms
1448    o * "clean" adjoint code (in terms of extensive recomputations)
1449        can now be obtained for all GMREDI options (i.e. for
1450        - GM_VISBECK_VARIABLE_K
1451        - GM_NON_UNITY_DIAGONAL
1452        - GM_EXTRA_DIAGONAL
1453        - GM_BOLUS_ADVEC )
1454      * However, wrong gradient check problem remains unsolved.
1455      * New CPP options have been introduced for different
1456        tapering schemes
1457    o external_fields_load now part of differentiation list
1458    o pressure needs multiple storing;
1459      would be nice to have store_pressure at beginning or
1460      end of forward_step, e.g. by having phiHyd global (5-dim.)
1461      (NB: pressure is needed for certain cases in find_rho,
1462      which is also invoked through convective_adjustment).
1463    o recomputations in find_rho for cases
1464     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1465    o #define ATMOSPHERIC_LOADING should be differentiable
1466    o ini_forcing shifted to begining of initialise_varia
1467    o Incorporating QNVS line search routines into MITgcm
1468      (this is separate code, and therefore not under pkg)
1469      lsopt/, optim/
1470    o Updated verification/carbon/
1471      - #define GM_VISBECK_VARIABLE_K
1472      - GM_taper_scheme    = 'ldd97'    
1473    
1474    checkpoint46n_post
1475    Merging from release1_p8:
1476    o verification/natl_box:
1477      updating new external_fields_load routine
1478    o New package: pkg/seaice
1479      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1480      The sea-ice code is based on Hibler (1979-1980).
1481      Two sea-ice dynamic solvers, ADI and LSR, are included.
1482      In addition to computing prognostic sea-ice variables and diagnosing
1483      the forcing/external data fields that drive the ocean model,
1484      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1485      The implied surface heat flux is then stored in variable
1486      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1487      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1488      non-local transport term.  Because this call precedes model
1489      thermodynamics, temperature under sea-ice may not be "exactly" at
1490      the freezing point by the time theta is dumped or time-averaged.
1491      N.B.: fairly large differences in accuracy occur across
1492            different platforms/compilers; comparison between
1493            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1494            generated output gives:
1495       T           S           U           V
1496      C D M    c        m  s        m  s        m  s        m  s
1497      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1498      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1499      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1500    
1501      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1502    o GAD:
1503      - generated new common blocks to account for call of
1504        same gad routines with differing traceridentities
1505        (needed to modify tracerIdentity indices in GAD.h)
1506      - generated separate common blocks for case useCubedSphereExchange
1507        (Department of Futurology)
1508      - parameter lists to gmredi_?transport: added tracerIdentity
1509      - added new key indices to tamc.h
1510    o external_fields_load:
1511      - added this routine to TAF list
1512      - needed to make some common blocks global and additional storing
1513        along the same lines as exf package (checkpoint_lev?_directives.h)
1514    o exf:
1515      updated external forcing package
1516      - bug fixes carried over from ecco-branch
1517        (missing OBCS_OPTIONS.h in two routines)
1518      - enable easy to use "no forcing".
1519      - added exf I/O for atmospheric loading
1520      - added exf I/O for runoff data
1521      - transfered scaling between exf <-> MITgcm to exf namelist
1522    o Adding new verification experiment global_with_exf.
1523      This verification experiment is almost identical to the
1524      global_ocean.90x40x15 experiment, except that it uses
1525      the exf (and cal) package instead of the
1526      external_fields_load routine (cf README file).
1527    
1528    checkpoint46m_post
1529    o modified testscript to return -- when there are no lines of "%MON" output
1530    o added new flag "quasiHydrostatic" for QH mode
1531      and new routine quasihydrostaticterms()
1532    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1533      New routine: mom_u_coriolis_nh()
1534    o fixed sign of non-hydrostatic metric terms in u and v equations.
1535      Depend on correct sign of gravitySign.
1536    o added work.pc* to .cvsignore in aim directories using ifc
1537    o introduced flag for controllin non-hydrostatic metric terms
1538    o removed gravitySign from PARM04
1539    o switched to g77/ifc from pgf77 in aim experiments
1540    
1541    checkpoint46l_post
1542    o made convective adjustment work with pressure coordinates:
1543     - changed the direction of k-loop in convective_adjustment.F for the
1544       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1545     - adjusted the reference pressure k-index in convective_adjustment.F
1546     - adjusted the convection condition in convect.F (in analogy to
1547       calc_ivdc.F)
1548     - convective_adjustment no longer computes anything on the halos
1549     - removed the warnings about negative salinity from find_rho.F and
1550       find_alpha.F; instead the new routine look_for_neg_salinity, called
1551       at the beginning of find_rho, find_alpha, and find_beta, does a
1552       check of the entire slice, if CPP-option
1553       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1554    checkpoint46l_pre
1555    
1556    checkpoint46k_post
1557    o fixed the verification/global_ocean.90x40x15 experiment:
1558     - new bathymetry (the world according to A., JMC, and M.)
1559     - new initial fields and forcing fields (*.bin files)
1560     - new POLY3.COEFFS (for the next release one should switch to a full
1561       equation of state: JMD95P or MDJWF)
1562     - fixed several errors and redundancies in the data file
1563     - experiment uses looped cells
1564     - added matlab directory with diagnostic scripts for plotting of output
1565    
1566    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1567     - read AIM physics parameters from a file (data.aimphys)
1568     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1569    
1570    checkpoint46j_post
1571    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1572    o move wVel computation at the end of the time step, in S/R integr_continuity
1573    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1574    o update timeave pkg for wVel diagnostic.
1575    checkpoint46j_pre
1576    
1577    checkpoint46i_post
1578    o Clean up AIM package (and keep the results unchanged):
1579      include CPP_OPTION and use IMPLICT NONE in all routines ;
1580      declare all the variables _RL ; use _d 0 for all numerical constants.
1581      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1582    
1583    checkpoint46h_post
1584    o cleaned up the use of rhoNil and rhoConst.
1585      - rhoNil should only appear in the LINEAR equation of state, everywhere
1586        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1587        and the dynamical equations are all divided by rhoConst
1588    o introduced new parameter rhoConstFresh, a reference density of fresh
1589      water, to remove the fresh water flux's dependence on rhoNil. The default
1590      value is 999.8 kg/m^3
1591    o cleanup up external_forcing.F and external_forcing_surf.F
1592      - can now be used by both OCEANIC and OCEANICP
1593    checkpoint46h_pre
1594    
1595     Added code to convert surface volume flux (fresh water) into
1596     a mass flux when using P coordinates in the ocean (OCEANICP).
1597     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1598    
1599    checkpoint46g_post
1600    o Include a new diagnostic variable phiHydLow for the ocean model
1601      - in z-coordinates, it is the bottom pressure anomaly
1602      - in p-coordinates, it is the sea surface elevation
1603      - in both cases, these variable have global drift, reflecting the mass
1604        drift in z-coordinates and the volume drift in p-coordinates
1605      - included time averaging for phiHydLow, be aware of the drift!
1606    o depth-dependent computation of Bo_surf for pressure coordinates
1607      in the ocean (buoyancyRelation='OCEANICP')
1608      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1609        Theta, Salinity, and Pressure in the parameter list. This routine is
1610        presently contained in find_rho.F. This routine does not give the
1611        correct density for 'POLY3', which would be a z-dependent reference
1612        density.
1613    o cleaned up find_rho
1614      - removed obsolete 'eqn' from the parameter list.
1615    o added two new verification experiments: gop and goz
1616      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1617    checkpoint46g_pre
1618    
1619    checkpoint46f_post
1620    o Enable tangent linear (forward mode) gradient checks:
1621      - extended active file handling to g_... files
1622      - added TANGENT_SIMULATION to theSimulationMode
1623      - extended grdchk package accordingly
1624    o added tangent linear setup in verification/carbon/code_ftl
1625    o added adjoint setup in verification/front_relax/code_ad
1626    
1627    checkpoint46e_post
1628    o Added new equation of state -> MDJWF
1629      - EOS of McDougall et al., 2002, JAOT, submitted
1630      - caveat: the equation of state is only valid for a smaller (more
1631        realistic?) range of values than JMD95P/Z and UNESCO
1632      - added masks to the calculation of pressure in store_pressure
1633      - added more check values for density in check_eos (ini_eos.F), some of
1634        the old check values are out of the range of the MDJWF-eos, so don't
1635        expect perfect matches for those
1636    checkpoint46e_pre
1637    
1638    checkpoint46d_post
1639    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1640      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1641      case of pressure coordinates. eosType='JMD95Z' in
1642      combination with buoyancyRelation='OCEANICP' now causes an error.
1643    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1644      in find_alpha/beta.
1645    checkpoint46d_pre
1646    
1647    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1648      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1649    
1650    checkpoint46c_post
1651    o Changes necessary for ocean in p-coordinates
1652     -  Added new buoyancy relation = 'OCEANICP'
1653     -  Added new parameters = gravitySign (this used to be contained inside
1654        the factor dRdZ which I added when we first switched to R coordinates).
1655     X GM/Redi is not compatible (yet)
1656     X bottom drag and no-slip need to be debugged.
1657    checkpoint46c_pre
1658    
1659    checkpoint46b_post
1660    o Added new equation of state -> JMD95Z and JMD95P
1661      - EOS of Jackett and McDougall, 1995, JAOT
1662      - moved all EOS parameters into EOS.h
1663      - new routines ini_eos.F, store_pressure.F
1664    o Added UNESCO EOS, but not recommended because it requires
1665      in-situ temperature (see JMD95)
1666    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1667      unesco.f to be used with POLY3
1668    checkpoint46b_pre
1669    
1670    checkpoint46a_post
1671    o Added (atmospheric) pressure loading
1672      - new field in FFIELDS.h, etc...
1673      - new cpp flag ATMOSPHERIC_LOADING
1674    o Changed hFacC to _hFacC in calc_phi_hyd.F
1675    o Added SHORTWAVE_HEATING to some files for consistency
1676    checkpoint46a_pre
1677    
1678    checkpoint46
1679    further merges from release1_p5
1680    o new ctrl package
1681      - adopted from ECCO environment to enable optimization
1682      - added Eliassen Palm fluxes to controls
1683    o added Eliassen Palm flux controls to gradient check package
1684    o cost package
1685      - Compatible with new ctrl package
1686      - added Eliassen Palm cost hooks
1687      - modif's of existing cost functions
1688    o Adjoint-related bug fixes in kpp:
1689      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1690      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1691    o autodiff package
1692      - flow directives:
1693        + new for S/R do_the_model_io
1694        + enhanced for S/R checkpoint
1695        + new gmredi.flow
1696      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1697        disable adcommon.h/g_common.h by default.
1698      - fixed problem for adjoint of global_max
1699    o modified verification/carbon/
1700    o New setup for adjoint of global_ocean
1701    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1702    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1703    o incorporated hooks for sponge layer code (external_forcing.F)
1704    
1705    checkpoint45d_post
1706    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1707    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1708      (affects plume_on_slope "cg2d" output)
1709    o add new parameter deltaTfreesurf for free-surface time stepping
1710    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1711    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1712    o change phiMin in exp1 (to agree with documentation)
1713    o add new flags:
1714     - T,S forcing inside/outside Adams-Bashforth
1715     - turn off temp,salt advection and/or forcing
1716     - for each tracer, define internal flag for multiDimAdvection & A-B
1717    o monitor: change definition of KE to check conservation of Energy
1718    
1719    checkpoint45c_post
1720    o Removed f90 comments ("!")
1721    o Modified initialisations to enable exf package for MITgcm
1722      (without invoking ECCO_PACKAGE).
1723    o modifications to gradient check package (Martin Losch)
1724      - enable centered differences
1725      - modified format of standard output
1726    
1727    checkpoint45b_post
1728    o cleaned exchange calls in cg2d
1729    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1730    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1731      to configure barotropic setup (Martin Losch)
1732    o moved some initialisations within bi,bj loop in dynamics
1733      (TAF flow dependency)
1734    o in initialise_varia, moved call packages_init_variables
1735      before convective_adjustment_init
1736      (corresponding adjustment of TAF tape initialisation).
1737    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1738    
1739    checkpoint45a_post
1740    o compute Rho over the whole domain (extend iMin,jMin indices)
1741    o specific exchange for X-slice domain (case Ny=1)
1742    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1743    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1744    
1745    checkpoint44h_post = checkpoint45
1746    o Fix to restore differentiability:
1747      place at which packages_init_variables is called in
1748      initialise_varia is crucial for reverse control flow.
1749    o modifications in GMRedi to enable stable adjoint
1750      (corresponding modif's in thermodynamics, dynamics)
1751    o added missing hook for sponge layer code in external_forcing
1752    o modified test cost functions
1753    o storing in gad_advection (plus removal of write(0,*)!
1754    o missing headers TR1.h added in convective_adjustment routines
1755    o errorMessageUnit set non-equal zero in eeboot
1756      (conflict on some platforms, e.g. IBM SP3)
1757    o modified carbon verif.
1758    
1759    checkpoint44h_pre
1760    o vertical grid option: allow to put the Interface at the middle between
1761      2 cell-centers ; replace delZ in pkg/kpp by drF.
1762    o GM Advective form: Tracers are advected using the residual transport (=
1763      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1764    
1765    checkpoint44g_post
1766    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1767      results) ; ifdef missing in thermodynamics.F
1768    
1769    checkpoint44f_pre,checkpoint44f_post
1770    o added PTRACERS package
1771      This allows an arbitrary number of passive tracers to be integrated
1772      forward simultaneously with the dynamicaly model.
1773      + Implemented so far:
1774        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1775        - I/O and checkpointing
1776        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1777      + Not implemented so far:
1778        - KPP
1779        - OBCS
1780      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1781        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1782        line in data.pkg.
1783      + This package is disabled by default since it increases storage.
1784    
1785    
1786    o testscript: added -cleanup option
1787    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1788                 b) enable to filter 2D fields.
1789    
1790    checkpoint44e_pre,post
1791    o re-wrote convective adjustment to use pre-calculated weights
1792      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1793      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1794      Original calls to convect() still in place.
1795    
1796    chkpt44d_pre,post
1797    o added missing EXCLUDE_MONITOR flags
1798    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1799      (incompatible typ in MIN/MAX expressions caused problems
1800      on IBM SP3)
1801    o in genmake added variable MAKEDEPEND
1802      plus resetting for case SunOS
1803    o added timer_stats.c routine for IBM SP3
1804    o removed variables in dynamics
1805    !!! I forgot to create tag chkpt44d_pre !!!
1806    !!! But chkpt44d_pre = chkpt44c_post    !!!
1807    
1808    o real fresh water flux implemented with non-linear free-surface.
1809    
1810    chkpt44c_pre,post
1811    o few fix (mask in shap_s2, EmPmR in external_field_load,
1812      USE_NATURAL_BCS in solve_for_P);
1813    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1814    
1815    checkpoint44b_pre/_post
1816    o merge of relevant stuff from the ecco-branch:
1817      - genmake: removed $S64 overwrite for case SunOS
1818      - pkg/exf: update and corrections for field swapping and obcs
1819      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1820                  harmonized between ECCO and MITgcm
1821      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1822                      updated checkpointing_lev... lists for obcs
1823      - model/src: minor changes in forward_step, plot_field
1824                   added directive for divided adjoint in the_main_loop
1825      - pkg/mdsio: added mdsio_gl_slice
1826    
1827    o check parameters & config (chkpt44a_pre,post)
1828    o OBC and NonLin_FrSurf.
1829    
1830    checkpoint44
1831    o fix bug in mom_vi_del2uv
1832    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1833    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1834    o update AIM experiments (NCEP input files)
1835    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1836    o added some stuff for AD
1837    
1838    checkpoint43
1839    o added two new advection tests
1840    o added global 4x4 degree ocean test
1841    o added test of H&S94 with free surface on cube
1842    o some final mods for gradient check, adjoint,...
1843    
1844    checkpoint42
1845      Fixed AD-related problems:
1846    o Store directives up-to-date with re-arranged Adams-Bashforth
1847      (mainly thermodynamics.F)
1848    o New store directives for multi-dim. advection schemes
1849      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1850      * new common block and key passkey
1851      (mainly gad_advection.F)
1852    o Modified store directives for split of dynamics/thermodynamics
1853      for the case ALLOW_KPP
1854    o Cleaned argument list for timestep_tracer.F
1855    
1856    checkpoint41
1857    o re-formatted/added comments in prologues of key subroutines
1858      to work with protex
1859    
1860    checkpoint40
1861    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1862    o added FLT (floats) package from Arne along with demo. experiment
1863    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1864      implementation of forward-in-time forcing terms
1865    o more mods for non-linear free-surface including new variable
1866    o modified multi-dim method to work on cube
1867    o bug fix in KPP (from DM)
1868    
1869    checkpoint40pre9
1870    o added DST advection schemes
1871    o fix MPI bug on SGI's
1872    o modifications for non-linear free-surface
1873    o fixed conditionals for fixed flow/passive tracer only mode
1874    o added tension/strain form of stress tensor
1875    o changes to commenting of arguments for TAF/TAMC
1876    o added/updated many matlab scripts
1877    o added multi-dimensional advection method for tracers
1878      
1879    checkpoint40pre8
1880    o new package rw/
1881      Added method for dumping intermediate local arrays:
1882      mdsio_writetile - same as mdsio_writefield except works from inside
1883                        bi,bj loop
1884      mdsio_writelocal - same as mdsio_writetile except works for local
1885                         arrays
1886      write_local_r? - higher-level wrapper for mdsio_writelocal
1887      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1888      Example given at end of mom_vecinv.F that dumps some local arrays.
1889    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1890      control flux-form versus vector invariant code.
1891      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1892      or genmake -DISABLE ...
1893    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1894      (additional storing is now needed for case vecinv;
1895      currently nothing implemented to switch this storing off
1896      in case fluxform is used since no CPP flag available).
1897    
1898    checkpoint40pre7
1899    o bug fix in dynamics.F
1900      calc_viscosity called before k=1,Nr loop.
1901    o added some #ifdef's ALLOW_PASSIVE_TRACER
1902    o cleaned initialisations in ctrl_map_ini
1903      related to TAF
1904    
1905    checkpoint40pre6
1906    o split dynamics into thermodynamics & dynamics
1907    o corresponding split of calc_diffusivity into
1908      calc_diffusivity, calc_viscosity
1909      (kpp_calc_diff, kpp_calc_visc).
1910    o Added diffkr, kapgm to control variables
1911    o bug fix in gmredi_slope_limit for ldd97
1912    
1913    checkpoint40pre5
1914    o proper initialization of Adams-Bashforth time stepping
1915      + uses forward step for very first step of model (iter=0)
1916    o re-generated *all* output since almost all output is modified by this
1917      change (sorry but we've been putting this one off for about 2 years)
1918      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1919        *not* regenerated since they are already out of date and I don't
1920        want to create the impression that they are suddenly working.
1921    o removed KAP stuff for DEC's
1922    o modified/added many .cvsignore files in */code and */input
1923    o added new expt "solid-body.cs-32x32x1"
1924      + this uses an alternative form of ini_curvilinear_grid.F which
1925        is not necessarily any better than the current one...
1926    
1927    checkpoint40pre4
1928    o added re-initialisations of utrans,vtrans,rtrans in
1929      calc_common_factors which are crucial for TAF.
1930    o extended iMin,jMin range for calc_common_factors,
1931      calc_diffusivity
1932    o added option ALLOW_PASSIVE_TRACER
1933    o a few minor updates and fixes
1934    
1935    checkpoint40pre3
1936    o created calc_gtr1.F for gad package
1937    o split the_main_loop and re-introduced forward_step
1938    o some recomputations of nIter0 for TAMC
1939    
1940    checkpoint40pre2
1941    o Updated to latest branch of AJA, JMC
1942    o Added gradient check package
1943    o Added routines for passive tracer handling
1944    o Added carbon sequestration sensitivity experiment
1945    
1946    checkpoint39
1947     o Modifications and fixes to support TAMC
1948       (mainly missing or wrong directives)
1949     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1950       in addummy_in_stepping
1951     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1952     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1953     o Included following packages:
1954       cal: calendar
1955       exf: external forcing
1956       ecco: essential routines to control use of cal, exf
1957             (NB: this is not the full ECCO environment)
1958     o disabled some packages by default in genmake
1959    
1960    checkpoint38
1961     o see notes_c37_adj.txt
1962     o corrected wrong layer index in external_forcing_t
1963     o replaced the_main_loop/forward_step by the_main_loop
1964     o removed forceoutput from write_state
1965       (replaced criteria for initial/final state)
1966     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1967    
1968    checkpoint37
1969     o mdsio.F routine split and packaged in pkg/mdsio
1970       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1971        used unless genmake -disable=mdsio)
1972     o allow a more precise surface-geopotential gradient for the atmosphere
1973       taking into account the change in space of Alpha (=1/rho) at the surface.
1974     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1975       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1976     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1977       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1978       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1979     o Time-Average diagnostics defined as a pseudo package "timeave".
1980     o pickup files : old pickup (before c35) did not work with new code (c35
1981       and after) unless activating 2 commented lines in initialise-varia.
1982     o Non-Hydrostatic pickup file Pb fixed.
1983     o bug with Rigid-lid version (since c35) fixed.  
1984    
1985    checkpoint36
1986     o implement Crank-Nickelson barotropic time-stepping
1987     o recover Time-Average diagnostics
1988     o fix Pb in checkpoint (PR#19)
1989     o AIM become a standard package ; clean unused CPP_kees
1990    
1991    checkpoint35
1992     o subtantial rewrite of dynamics.f
1993     o allows staggered time-stepping
1994     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1995     o added bottom drag (linear + quadratic)
1996    
1997  checkpoint34  checkpoint34
1998   o Modified exchange routines for correct reverse simulation.   o Modified exchange routines for correct reverse simulation.
1999   o Added verification output to comply with bug fix in impldiff.F   o Added verification output to comply with bug fix in impldiff.F

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