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revision 1.29 by adcroft, Thu Jul 13 14:22:58 2000 UTC revision 1.439 by jmc, Fri Jan 28 01:32:09 2005 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o move state variable diagnostics to the beginning of the time step ;
7      (note: still needs some work specially for snap-shot diagnostics)
8      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
9    
10    checkpoint57c_post
11    o Change testing option (-ieee) to get closer agreement between g77 & ifort
12    o generate new output.txt files on faulks with g77 & the new -ieee option
13    checkpoint57c_pre
14    
15    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
16      update output.txt of exp. global_ocean.90x40x15
17    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
18      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
19    o add saltFlux(+File) forcing capability with periodicExternalForcing
20    o allow to use pkg diagnostics for GM-Redi & ThSIce output
21    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
22    o improvements for the MNC output from DIAGNOSTICS:
23      - correct handling of the unlimitied dimension
24      - all dims now have associated coordinate variables
25      - variables located at U, V, and Corner ("Z") points are now written
26        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
27        *all* data points are output
28    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
29    o added pkg/seaice/seaice_monitor.F
30    o mdsio_readfield.F can now read files visible only to master MPI process.
31    o pkg/seaice: some test code for ice-modified ocean stress
32    o exf_getffields interpolation defaults to bilinear for all scalar forcing
33      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
34      spurious negative numbers for precipitation and humidity.  Will cause
35      some small numerical differences for integrations using pkg/exf/exf_interp.F.
36    o pkg/ctrl/
37      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
38        May be enabled via doPackDiag
39      *  introduce z-scaling of
40         + gradient (doZscalePack) and
41         + control (doZscaleUnpack)
42    o pkg/mdsio/
43      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
44      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
45    
46    checkpoint57b_post
47    o simplify options in diagnostics_fill arguments (remove weird combinations)
48    o fix MNC coordinate variables so that they now contain per-face index
49      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
50      general, EXCH2 grids are only aligned to a "local" coordinate system
51    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
52    o Implement instantaneous output within pkg diagnostics:
53      setting a negative frequency in data.diagnostics produces
54     "snap-shot" output (as opposed to time-average if freq > 0)
55    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
56      NOTE: change ptracer diagnostics name: use 2 characters to work with
57            more than 9 tracers. Add also diagnostics of advect & diffus flux.
58    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
59      becomes the coordinate variable for the 'T' dimension
60    o add CF-style coordinate variables to MNC
61      - just a first cut:  numbers are meaningless on the cubesphere and
62        missing along the T axis but otherwise it works!
63    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
64    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
65    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
66      this is based directly on what the model compute, so that the content of
67      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
68    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
69    o clean up build options files for SunOS, in particular
70      - remove -traditional from xmakedepend
71      - change -xarch=v9 to -xarch=native for f77
72      - restore use of make (not gmake)
73      - add CC=gcc if using g77
74    o changes per discussion of AM, JMC, & EH3 today:
75      - move redundant "grid" variables out of "state" -- in preparation of
76        creating proper CF-style coordinate variables and in recognition
77        that any/all grid variables can be easily copied (eg. w/NCO) from
78        the grid files into any of the other NetCDF files
79      - *always* output grid variables with MDSIO (this will eventually be
80        changed)
81      - output MNC grid file if useMNC is true
82    o every instance of _END_MASTER() has been found and replaced with
83      _END_MASTER( myThid ) in order to satisfy certain picky Sun
84      preprocessors
85    o re-arrange diagnostics pkg initialisation:
86     - allow each package to extend the available diagnostics list
87     - add some checking and fix small problems (multi-threaded, ...)
88     - new S/R diagnostics_fill (replace fill_diagnostics):
89       look through the short list of active diag. (instead of the long list)
90       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
91    
92    checkpoint57a_post
93    o this set of changes restores TAMC compatibility
94      tested for global_ocean.90x40x15 adjoint on trough
95      (what a pain)
96    
97    checkpoint57a_pre
98    o some modifs in tools/build_options for sunos
99    o call ctrl_pack for ctrl at end for optimcycle=0
100    
101    checkpoint57
102    o add horizontal bi-harmonic viscosity for vertical velocity
103      - new parameter viscA4W (defaults to viscA4)
104      - affects only non-hydrostatic code
105      - to be done: no-slip lateral boundary conditions
106    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
107    o implement Implicit Vertical advection for pTracers
108    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
109      (implemented also for implicit vertical diffusion & advection)
110    o OBCS: extend application of tracer open boundary conditions
111      to a strip beyond the boundary of width Olx/Oly
112    o add call monitor to TAF set of required calls (flow directives)
113      and include in natl_box_adjoint
114    o untangle a few ifdefs related to cost, ctrl, autodiff
115      untangel a few ALLOW_ECCO_OPTIMIZATION
116    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
117      (theta2, salt2 in ecco_cost_weights)
118    
119    checkpoint56c_post
120    o OBCS as control variables
121      - update ctrl_ad_diff.list, obcs_ad_diff.list
122      - remove balance of obcs controls from default
123      - fix index bug nobcs in ctrl_init
124      - fix dummy fields filen in ctrl_pack
125      - add dummy weights for obcs
126    o lsopt: comment out fort.94 output
127    o optim:
128      - remove unnecessary header files
129      - adjusted namelists
130      - add xerbla.F to Makefile
131    o exf:
132      - multiple modifications of exf_check_range
133      - unit change in exf_init_runoff from [m/year] to [m/s]
134    o mdsio:
135      - i/o-vector change debugLevel from debLevA to debLevB
136    
137    checkpoint56b_post
138    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
139      is called from DO_THE_MODEL_IO
140      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
141      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
142      - clean up PTRACERS_WRITE_TIMEAVE a little
143    o add another verification experiment that tests both the cfc-pkg and
144      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
145      reactive tendencies treated inline with regular timestepping
146    o testreport previously did a lousy job of comparing small numbers, so
147      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
148      implemented in the little c-progam tmp_cmpnum.c which is embedded in
149      testreport.
150    o ptracers_monitor: bug fix for MPI
151    
152    checkpoint56a_post
153    o GCHEM: finish reorganizating the package
154      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
155        (introduces another 3D-array for each passive tracer, but only if
156        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
157        gchemTendency is not needed because the timestep is done separately)
158      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
159      - GCHEM is now---more or less cleanly---separate from PTRACERS
160      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
161        so clear to me how that should be done in a general way.
162    o CFC: improve formatting of output in CFC_ATMOS
163    o PTRACERS:
164      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
165        that ALL experiments with ptracers enable can be checked. This makes
166        GCHEM_MONITOR obsolete.
167      - include a runtime parameter PTRACERS_monitorFreq that defaults to
168        monitorFreq
169      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
170    o add PTRACERS (PTR0[1-5]) to testreport output
171    o exf_check_range:
172      * default changed to .TRUE.
173      * will check values for niter0 if debLevA, every timestep if debLevB
174      * STOP in exf_check_range if 'out of range'
175      * range chosen generous to allow for potential extema
176      TBD: a version with stricter range
177           permitted range would be runtime parameters
178    o GMredi:
179      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
180      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
181      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
182    o GCHEM:
183      - move call to GCHEM_FORCING_SEP, so that it is now called before
184        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
185      - introduced a useGCHEM runtime flag and applied it everywhere.
186      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
187        this flag is now only visible within GCHEM-pkg routines.
188      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
189        be replaced by a 3D array that is computed before thermodynamics; for
190        this, the tracer ID iTracer had to be included into the parameter list
191        of ptracers_forcing
192      - set up forward_step to call gchem_forcing, that will replace
193        gchem_forcing_int in ptracers_forcing
194      - cleaning up
195    o small cleaning of exch2: remove files that are also in eesupp/src
196    
197    checkpoint56
198    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
199    o mnc: cleanup "full" files--fixes out-of-memory problem
200    o ECCO-GODAE
201      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
202      * fully merged and updated from SIO code
203        windstress sign change affects
204        - exf_inscal_[u/v]stress
205        - sign of xx_tau[u/v] adjustments
206        - signs in cost_scat
207      * ctrl_get_gen: avoid update of tau[u/v] for first few days
208      * natl_box_adjoint updated and compressed
209      * 2-level checkpoint switch added
210        (tested in EXP. 1 of natl_box_adjoint)
211      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
212    o SVD
213      * first complete, non-hacked version for SVD calculations
214      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
215        performed via direct access files admtlm_vector.it????
216        (via ctrl_[un]pack)
217      * optimcycle is used for ARPACK iteration counter
218        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
219      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
220        and add linear transforms where necessary
221      * controls are initial/final SST, SSS (can be extended; need to check
222        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
223    o mdsio: filename info to both stderr, stdout
224    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
225      from sign change
226    
227    checkpoint55j_post
228    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
229      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
230    o add consistent build directories and .cvsignore files to verification
231    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
232    o make all subroutines 30 or less characters in length for certain older
233      compilers to work (a thorough search only turns up two routines in
234      pkg/ptracers)
235    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
236      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
237    
238    checkpoint55i_post
239    o change arrays for total vertical diffusivity (2.D if explicit,
240      3.D if implicit) ; each ptracer uses its own background value.
241    o added mnc/NetCDF output capability to ocn_compon_interf
242      - added bits to verification/cpl_aim+ocn so that it can run on
243        ITRDA and other clusters without the mpirun "-wd" option
244    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
245      configuration
246    o give MNC the ability to create additional files rather than
247      exceeding a specified file size limit "MNC_MAX_FILESIZE"
248      - the default is just less than 2GB which is a practical limit
249        on many systems
250    o Compute the non-local term using either KPP vertical diffusivity (=default)
251       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
252    
253    checkpoint55h_post
254    o add verification test "vermix"
255    o remove all the *_ioinc flags and replace with the single global
256      outputTypesInclusive flag
257    o allow to set a vertical profile of vertical diffusivity for T & S
258    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
259    o useMNC moved from data.mnc to data.pkg
260    
261    checkpoint55g_post
262    o Renaming carbon AD experiments to comply with testreport conventions
263    o Updating adjoint of Held-Suarez hs94.1x64x5
264    o Fixing directives for non-ECCO forward_step, after ECCO directives
265      have been fixed to avoid recomp. of do_oceanic_phys
266      Works well for global_ocean.90x40x15,
267      but recomp. issue remains for carbon
268    o Updating adjoint output for natl_box_adjoint after
269      pkg/ecco has been modified (see taga c55d_post)
270    
271    checkpoint55f_post
272    o rename to timeave_init_fixed
273    
274    checkpoint55e_post
275    o some delicate re-shuffle of store directives to avoid one
276      extra call of do_oceanic_physics
277      affects ecco_the_main_loop.F, do_oceanic_physics.F
278      checkpoint_lev1_directives.h
279    o NB: this may break global_ocean adjoint temporarily,
280      but it is clear how to fix it. Will do later, need this now.
281    
282    checkpoint55d_post
283    o ECCO specific cost function terms (up-to-date with 1x1 runs)
284    o ecco_cost_weights is modified to 1x1 runs
285    o modifs to allow observations to be read in as
286      single file or yearly files
287    o enable to read exf forcing fields as either
288      single file or yearly files (flag useExfYearlyFields)
289    checkpoint55d_pre
290    
291    o switch between 2-level and 3-level checkpointing
292    o add ability of MNC to write local and "partial" (eg. 2D slices where
293      the full 3D field is never actually stored) arrays to NetCDF files
294      with the correct (that is, the complete multi-dimensional) set of
295      array indicies
296      - used in mom_vecinv() to write the diagFreq output
297      - tested (demonstrated) in verification/aim.5l_cs
298    o further mnc-ification
299      - add verification/lab_sea to the list with mnc setups
300      - fix undefined mnc v-names in cd_code
301      - add kpp to mnc output (both snapshot and timeave)
302    o non-hydrostatic code
303      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
304        in calc_gw.F
305      - defaults to viscAh
306      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
307        friction or Leith) in non-hydrostatic mode, as long as there is
308        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
309    o pkg/cost
310      extend simple cost functions to treat time mean quantities
311      (T,U,V) via cost_accumulate_state from cost_tile
312    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
313        be 2 times larger than the minimum size the advection scheme requires.
314        now get a perfect conservation of salt in advect_cs test-exp (updated)
315    o GGL90 (Gaspar's TKE mixed layer)
316      - add horizontal diffusion of TKE, requires exchanges in
317        do_fields_blocking_exchanges, horizontal diffusivity is zero by
318        default. In OPA there is no horizontal diffusion of TKE but the
319        mixing coefficients are computed from a horizontal average of TKE of
320        6 points or so. I think that diffusion has a little more physical
321        justification.
322      - clean up ggl90_calc in the hope of reducing memory usage (this hope
323        was in vain)
324      - mask tke-variable in ggl90_init
325    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
326    o fix biharmonic diffusion on CS-grid.
327    o more obcs stuff
328      - added obcs_external_fields_load as an alternative to the EXF-pkg option
329        for reading boundary values. This routine is called from
330        obcs_prescribe_read
331      - updated obcs_check
332      - changed sponge layer relaxation parameter units for days to seconds
333      - turned off sponge layer by default
334      - changed argument list of OBCS_CALC to myTime+deltaTclock
335      - fixed about 35 bugs in obcs_external_fields_load
336    
337    checkpoint55c_post
338    o obcs stuff
339      - new runtime flags useOBCSprescribe, useOBCSbalance
340      - re-arranged obcs_calc
341      - moved exf_getobcs to obcs_prescibe_read
342        obcs_prescibe_read is called after ORLANSKI stuff
343        and independent of it (executable can contain all).
344      - updated obcs_check
345      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
346        These may be necessary only if tangential velocities are
347        prescribed at OB, not sure, needs testing.
348    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
349      which simplifies the calls and passes the ifc check-bounds test
350    
351    checkpoint55b_post
352    o add a 2D scalar, Z location, exchange_2 routine.
353    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
354      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
355      affects advect_cs results (for the wrong reason): update output.txt
356    o use a more standard discretization for biharmonic viscosity ;
357     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
358      affects results of dome set-up: update output.txt
359    o fix gad_advection.F (CubedSphere part), back to version 1.23
360    o fix bug in mom_vi_del2uv.F (CubedSphere part).
361    
362    checkpoint55a_post
363    o merged code to
364      * prescribe/read time-dependent open boundaries
365        (works in conjunction with exf, cal)
366      * sponge layer code for open boundaries
367      * each boundary N/S/E/W now has its own CPP option
368        (healthy for the adjoint)
369    
370    checkpoint55
371    o up-to-date adjoint of previous breaks
372      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
373      - global_ocean_ebm: adjoint still needs fix (TLM ok)
374      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
375      - carbon: * remove tr1-related adjoint verification
376                * add ptracer as control variable
377    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
378      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
379    
380    checkpoint54f_post
381    o in verification/carbin/ remove experiment related to
382      ALLOW_PASSIVE_TRACER (array tr1 etc)
383      code_ad/ input_ad/ results_ad
384    
385    o add two new packages
386      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
387        + subject to optimization (memory)
388      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
389        + subject to reordering (many GOTOs in the original code)
390        + so far opps is called for every (i,j) point, and then operates in
391          the vertical; one may want to reorder the scheme in order operate in
392          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
393          fields)
394    o overhaul of IO so that we now have flags for MDSIO and/or MNC
395      - all verification tests compile and run with linux_ia32_g77
396      - defaults are compatible with current input files--nothing
397        should change if you were not previously using MNC
398      - MNC output has been added in numerous places (eg. timeave)
399        but there are still a few writes not yet do-able with MNC
400        (this is in progress)
401      - flags now allow for either/or/both use of MDSIO and MNC and
402        documentation will soon follow
403      - numerous small formatting cleanups for ProTeX
404    o add version info (via BUILD_INFO.h) to MNC and stdout
405    
406    checkpoint54e_post
407    o add two new packages
408      - pp81 (Packanowski and Philander, 1981), Richardson number and
409        stratification dependent mixing
410      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
411      - these scheme operate in a similar manner as KPP (without ghat, of
412        course), however there is only one diffusivity that is used for both
413        temperature and salinity (and passive tracers)ç
414    o add offline package
415    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
416      provided by Stephanie Dutkiewicz
417    o genmake2: add ability to search for C compilers and cleanup test output
418      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
419    
420    checkpoint54d_post
421    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
422    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
423      leading to additional shift by 5 days each year of integration
424       (i.e. leading to considerable offset over the years)
425    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
426    o start with no AB and no initial filtering (staggerTimeStep):
427      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
428    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
429      (external loading & cpl import/export stay in forward_step.F)
430    o update coupling interface to work with new staggerTimeStep
431    o change MDSIO ptracers_pickup.
432    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
433    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
434    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
435    
436    checkpoint54c_post
437    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
438      this affects (truncation error) output.txt of test-exp:
439       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
440    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
441    o change Qnet to always be the net heat flux, (+upward).
442      affects (truncation error) output of natl_box exp.: updated
443    o define the max number of passive tracers in PTRACERS_SIZE.h
444    o start to test mnc routinely in exp0
445    o add sea-ice loading (sIceLoad) as a new forcing field.
446    
447    checkpoint54b_post
448    o add testreport "-j JOBS" option for parallel builds (tested and pretty
449       impressive on Altix and Opteron systems)
450    o diagnostics can now write NetCDF files through the mnc package
451    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
452    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
453    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
454      affects (truncation error) output of lab_sea & natl_box exp.: updated
455    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
456    
457    checkpoint54a_post
458    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
459    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
460    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
461    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
462      + internal_wave (shift in writing cg2d_ini_res)
463    checkpoint54a_pre
464    
465    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
466      - modified verification/lab_sea and natl_box_adjoint accordingly
467    
468    checkpoint54
469    checkpoint53g_post
470    o prepare splitting of thermodynamics: store convect.counter in common block
471    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
472      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
473    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
474    o new parameter "nShapS": allow to treat differently S from T (nShapT)
475    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
476    o restore adjointability
477    
478    checkpoint53f_post
479    o modifications that affect AIM experiment results (update output.txt):
480      - no advection of S at top interface Nr (pkg/generic_advdiff)
481      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
482    o AIM pkg:
483      - include stability function into surf.Flux derivative relative to Tsurf
484      - calculate clear-sky radiation & surface temp. change (for diagnostics)
485    
486    checkpoint53e_post
487    o merged cylindrical coord configuration
488    o added rotating_tank experiment
489    checkpoint53e_pre
490    
491    checkpoint53d_post
492    o faulks upgraded: re-generate output.txt that have changed:
493       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
494    o Added Bryan and Lewis, 1979, vertical diffusivity profile
495    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
496    o added Sadourny discretization of Coriolis
497      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
498      - re-enabled use of omega3 (useAbsVorticity)
499    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
500      vector-invariant equations
501      - note: does *NOT* yet use same variable visc. for no-slip BC's.
502    o recoded the lateral boundary conditions for non-hydrostatic w, this time
503      hopefully without new bugs
504      - still to do: biharmonic friction for non-hydrostatic w
505    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
506    o regenerated output for global_ocean_ebm (using -ieee)
507    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
508      of mom_common/
509      - simple re-arrangement of instructions within computing loop
510    checkpoint53d_pre
511    
512    checkpoint53c_post
513    o new version of coupler for AIM+thSIce and Ocean models
514     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
515     - land: change Evaporation of snow
516     - aim with thSIce: fix bug in snow-precip.
517    o changes to calc_gw.F
518     - bug fix for w^2 term near the bottom boundary
519     - (hopefully) improve the lateral slip boundary condtions for use with
520        partial/looped cells
521      - because the bug fix changes two verification experiments anyway (exp5
522        and plume on slope), change the lateral boundary condition from half slip
523        to the value of no_slip_sides
524    o ebm package wasnt quite up to the parallel task. Fixed that.
525    o Adjoint of EBM package + verification
526      * TLM OK
527      * ADM not sufficient accuracy yet (needs further testing)
528    
529    checkpoint53b_post
530    o Commiting new energy balance model to repository
531      * package is pkg/ebm
532      * verif. is verification/global_ocean_ebm
533      * references are in ebm_driver.F
534    C      * X. Wang, P. Stone and J. Marotzke, 1999:
535    C        Global thermohaline circulation. Part I:
536    C        Sensitivity to atmospheric moisture transport.
537    C        J. Climate 12(1), 71-82
538    C      * X. Wang, P. Stone and J. Marotzke, 1999:
539    C        Global thermohaline circulation. Part II:
540    C        Sensitivity with interactive transport.
541    C        J. Climate 12(1), 83-91
542    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
543    C        Destabilization of the thermohaline circulation
544    C        by atmospheric eddy transports.
545    C        J. Climate 7(12), 1870-1882
546    o Will need long integration testing.
547    checkpoint53b_pre
548    
549    o created pkg/mom_common in preparation for variable viscosity code
550    o renamed and split ini_mnc_io
551    o pkg/land: only liquid water can diffuse or run-off
552    o AIM using land: soil wetness availability account for snow
553    o added printMapIncludesZeros to EEPARMS namelist
554    
555    checkpoint53a_post
556    o restore TAMC compatiility for exf_constants.h
557      (no usage of _d in .h)
558    o Additional storing in KPP in an attempt to fix
559      TAMC problem with adjoint of KPP code.
560      (no success...)
561      Identical code works fine with TAF.
562    o Fixed verification/natl_box_adjoint experiments.
563      Initial conditions for Experiments 4 and 5 are now
564      set to "SEAICE_initialHEFF=0", which is more reasonable,
565      and hence gives results closer to that of Experiment 2.
566      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
567    
568    checkpoint53
569    o stable checkpoint with up to date adjoint
570      TLM tests only run for 1st grdchk at the moment. Its unclear if
571      this is a code problem or a problem with resetting code for g_
572      variables that is being autogenerated wrong.
573      Otherwise:
574       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
575       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
576         are both still in chaos following their security messes.
577    
578    checkpoint52n_post
579    o various build (mostly genmake2) changes including:
580      - ability to build/run more easily within Cygwin and MacOS X
581      - more complicated Makefiles with a stronger dependence on Gnu Make
582    o pkg/seaice modifications
583      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
584        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
585        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
586      - changed proxy for geostrophic velocity and updated
587        verification/lab_sea/results/* accordingly
588      - removed ADI dynamic solver from pkg/seaice
589      - replaced all occurrences of 1/CSTICE or 1/CSUICE
590        they caused a segmentation fault under certain circumstances
591      - removed unused field WATR
592    o bug fix in exf-package:
593      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
594         now reflect that.
595    o small fixes in the cal-package:
596      - set reference date to first of January for the 'model'-calendar
597      - failing of cal_CheckDate in cal_FullDate now actually results in a
598        warning
599    o small modifications in exf-package to increase flexibility:
600      - change climtempfreeze from a constant to a runtime parameter that
601        is specified in data.exf_clim (default = -1.9)
602      - introduce runtime parameter windstressmax (default = 2.0) that is
603        specified in data.exf
604    o fix in pkg/thsice:
605      - update Evap (Tsf changes) to be consistent with Latent heat flux
606      - maintain snow precipitation unchanged (even if Tsf >=0).
607     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
608    
609    checkpoint52m_post
610    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
611      this does not change any of the results, because myIter=0 in swfrac always
612      lead to jwtype=2 (the default anyway), but the call makes little sense
613      as a default
614    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
615    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
616      atmospheric model (AIM) to use it ; add a "slab ocean" component.
617    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
618    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
619    o extending useSingleCpuIO option to work with new exch2 I/O format
620      - old-style, missing-tile I/O is still accessible by defining CPP
621        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
622    o monitor package can write to NetCDF files and/or STDOUT
623    o fix re-definition bug in MNC_GRID_INIT_ALL()
624    o doc/api_reference added
625      - a framework for building an API Reference Manual using all
626        the "protex" comments embedded in the code
627      - see pkg/generic_advdiff, pkg/mnc for examples
628    o MNC:
629      - make myThid the last argument for all subroutines
630      - new default for the grid files: NO halos
631      - add useMNC and other run-time flags
632      - separate per-file-group handling of the unlimited dimension
633      - early initialization of MNC w/ flags read at the eeboot stage
634        and lookup tables set in initialize_fixed
635      - write all MNC output to a freshly-created directory
636    o thermodynamics sea-ice (thsice) is now tested with testreport.
637    o test exp. advect_cs: use the standard cs32 grid ; update output.
638    o Added functionality to grdchk:
639      pick global i,j,k position (or nearest wet) where to perform check.
640    
641    checkpoint52l_post
642    o new land formulation:
643      a) use ground enthalpy as prognostic variable to ensure exact
644         energy conservation.
645      b) account for water temperature and for latent heat of freezing
646         in all processes (rain, run-off, ground storage)
647      c) compute surface and ground temperature implicitly.
648    o aim_v23 modification for new land model:
649      a) Treat separately land / ocean / sea-ice surface fluxes
650         to allow implicit computation of land & sea-ice surface temp.
651      b) add snow precipitation.
652    checkpoint52l_pre
653    
654    o fix problem (when 1 tile is empty) in min/max monitor.
655    o fix bug in timeAve (u,vZetatave in common block)
656    o no restoring terms under ice for pkg/seaice
657    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
658    o bug fix for pkg/seaice pickups
659    o change MNC call locations and add coordinate attributes
660    o mask vorticity at the corner ; affects global_ocean.cs output
661    o fix ini_curvilinear_grid ; test CS experiments with mpi
662    o aim.5l_cs: modify sea-ice fraction input file ; update output
663    o exf: Adding simple range check routine for exf fields after read
664    
665    checkpoint52k_post
666    o removed top-level directory "diags"
667      - we migrated these functions to pkg/timeave a long time ago
668    o fixed bug introduced in pkg/monitor
669    o accuracy ctrlprec = 32 insuffient for gradient checks using
670      averaged fields (I/O via cost_averages)
671      -> use ctrl.h in active_file*.F to control I/O precision.
672    o paramter list of CALL ADTHE_MAIN_LOOP
673    o added initial do_the_model_io to ecco
674    o set all ...Freq to zero after cost_final
675      taveFreq, dumpFreq, pChkptFreq
676    o MAIN and ECCO differentiability restored
677    
678    checkpoint52j_post
679    o fix nchklev in tamc.h for global_ocean...
680    o Bringing flow and store directives up-to-date
681    o Really weird thing!
682      call do_the_model_io from the_main_loop with parameters
683      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
684      TAF places a faulty re-call of initialise_varia
685      after cost_final call which should not be there!
686    checkpoint52j_pre
687    
688    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
689      error messages
690    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
691    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
692      debug output
693    o modfied mdsio_writefield.F to handle non-global files under exch2
694    o update AIM Cubed-Sphere exp (aim.5l_cs):
695      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
696    o update AIM Equatorial Channel exp:
697      use standard aim_v23 pkg and change the SST fields to be more realistic.
698    o globalFile now works with exch2
699    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
700      mon_vort3.F to make exch2 friendly with >1 tile per cube face
701    o limit timeave output for hi-res integrations
702    
703    checkpoint52i_post
704    o removed CPP_EEOPTIONS.h from verification/*/code
705    o updated the tiling for global_ocean_pressure
706    checkpoint52i_pre
707    
708    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
709      the old pkg/aim).
710    
711    checkpoint52h_pre
712    o shortened offending lines in exch2_send_rx?.template
713    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
714    o genmake2: add build & execute test for NetCDF code
715    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
716      old grid files, moved CPP_EEMACROS.h to pkg/exch2
717    o added useSingleCPUIO flag to monitor.F and mon_out.F
718    o added temporary hack for sea-ice dynamics on the cube:
719      metric terms are ignored and it is assumed that
720      there is no sea-ice on cube faces 1, 2, 4, and 5.
721    
722    checkpoint52f_post
723    o added exch2 cube routines to pkg/exch2
724    o modified hs94.cs-32x32x5 to use it
725    o added new grid files to hs94.cs-32x32x5
726    checkpoint52f_pre
727    
728    checkpoint52e_post
729    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
730      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
731    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
732      to work with implicit vertical advection and AB ;
733    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
734    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
735     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
736    checkpoint52e_pre
737    
738    o fix bug in impldiff when Nr=1 or Nr=2.
739    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
740    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
741    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
742      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
743    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
744    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
745    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
746    
747    checkpoint52d_post
748    o re-tiled many expts to allow comparison in multi-processor mode
749      - updated output accordingly
750      - changed hs94.128x64x5 to use intial T from file rather than use the
751        random number generator
752    o add infrastructure in model routines for fizhi and gridalt packages
753    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
754    o changes to permit hi-res, cubed-sphere, configuration
755      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
756      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
757      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
758        of surface winds for the cube
759      (A verification experiment, based on global_ocean.cs32x15, but with
760       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
761       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
762       complete with example surface forcing files and matlab scripts to look
763       at the output and compare it with that of global_ocean.cs32x15.)
764    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
765       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
766       to conform to the common rule.
767    o check-in the first version of the coupler + interfaces for multi-components
768       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
769       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
770       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
771       - ocean and atmos. share the same horizontal grid (no interpolation).
772       - exchanges between component and coupler is done in forward_step
773    o new verification experiment, cpl_aim+ocn:
774       coupled ocean - AIM atmosphere on cs32 grid.
775    
776    checkpoint52d_pre
777    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
778    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
779    
780    checkpoint52c_post
781    o Fixing OPTIONS files for use of exf:
782      - ALLOW_ECCO not needed
783      - ECCO_CPPOPTIONS.h should not be included from
784        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
785        as has been the case in the past
786      - All cal/exf related options are currently set in
787        single header file. Should remain so until we
788        agree on a consistent new policy.
789    o Removed all CPP options for cal package.
790      cal has no more CPP options.
791    o modified STOREs in GAD_ADVECTION
792    o corrected key comp. for passkey
793    
794    checkpoint52b_post
795    o new version: "thsice" of thermodynamic sea-ice pkg:
796     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
797     - modify fluxes but do not change theta directly;
798     - light cleaning of bulk_force pkg (still needed with thsice).
799     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
800       + output_thsice.txt to test thsice & bulk_force pkgs.
801    o put back grid & coriolis monitor output.
802    checkpoint52b_pre
803    
804    o call "do_the_model_io" at the beginning (=> dump initial state)
805    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
806    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
807      (need info on NUMBER_OF_PTRACERS)
808    o missing PTRACERS headers in some routines
809    o default tamc.h in pkg/autodiff supposed to crash
810      to ensure proper customization
811    
812    checkpoint52a_post
813    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
814      - moved surfaceTendencyTice from pkg/seaice to main code
815      - subroutine FREEZE_SURFACE now limits only surface temperature
816        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
817        => new output.txt for global_ocean.cs32x15 & global_with_exf
818      - keep the old version of FREEZE for backward compatibility;
819        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
820      - corresponding modifs for TAF directives
821    o added surface flux output variables to TIMEAVE_STATVARS
822    o time-averaged output for pkg/ptracers
823    o fix problem with ECCO-related divided adjoint
824      snapshot file was missing some ad-variables,
825      but no warning issued by TAF
826    
827    checkpoint52a_pre
828    o some bug fixes for #undef REAL4_IS_SLOW
829    
830    checkpoint52 = ecco_c52_e35
831    o after testing adjoints of checkpoint51u_post
832    
833    checkpoint51u_post
834    o this is the post-merge tag of the ecco-branch
835      (needs another clean checkout and re-testing)
836    o various natl_box_adjoint configs and results
837      but no input fields
838    o obcs adjoint not yet merged!
839    o adding ECCO global 1x1 and 2x2 degree configs
840    o updated/extended some store directives for seaice
841    o pkg/ecco now containes ecco-specific part of cost function
842    o top level routines the_main_loop, forward_step
843      supersede those in model/src/
844      previous input data.cost now in data.ecco
845      (new namelist ecco_cost_nml)
846    o in ctrl/ cleaned some cross-dependencies and updated CPP options
847    
848    checkpoint51t_post
849    o this is the pre-merge tag of the ecco-branch
850    
851    checkpoint51s_post
852    o cleanup: removed various obsolete #define-s
853    o pkg/grdchk
854      - renamed 'ph-grd 3' to 'grad-res'
855      - merged from ecco-branch
856        (remaining bug fixes for obcs gradient checks)
857      - additional high-precision output for testreport
858        (grep for 'precision_grdchk_result')
859    
860    checkpoint51r_post
861    o cleaned up or removed CPP_OPTIONS.h files
862    o updated results for some of the tests to reflect the new
863      optfiles (-ieee: -O0 instead of -O3)
864    
865    checkpoint51q_post
866    o cd_code:
867      - moved cd_scheme.F -> cd_code_scheme.F
868      - separate read_checkpoint from cd_code_ini_vars.F
869      - separated cd_code part from write_checkpoint
870      - updated AD_SOURCE, generated .flow
871      - added CD_CODE_VARS.h to the_main_loop
872      - Moving cd_code specific store dir.s to pkg/cd_code
873    o ctrl package totally restructured
874      - pack/unpack now optional and decoupled from
875        xx_/adxx_ I/O
876      - ctrl_pack/unpack cleaned
877        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
878      - confined inclusion of AD_CONFIG.h to where necessary.
879    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
880    
881    checkpoint51p_post
882    o create initial cd_code package
883      - WARNING: the initialization of fields within packages
884        is broken because INI_FIELDS (where READ_CHECKPOINT is
885        called) is called *before* PACKAGES_INIT_VARIABLES.
886        This seems to be backwards since
887        1) its important to initially zero the entire field including
888           the "halo" region
889        2) zeroing needs to be done *before* reading pickup info
890           and the pickup call might or might not happen in any
891           particular run
892      - this needs an overhaul for R2
893    o cleanup verification/*/code/GMREDI_OPTIONS.h
894    o cleanup testreport
895    
896    checkpoint51o_post
897    o bringing AD-related verif's up to date with genmake2
898      - carbon/
899      - global_ocean.90x40x15/
900      - hs.94.1x64x5/
901      - (front_relax/ )
902    o (more) consistent directory structure for AD-related verif.'s
903    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
904    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
905    o bug fix in find_alpha.F for MDJWF:
906      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
907        change rho -> rho-rhoConst
908      - replace call find_rho to find_rhonum
909    o initialisation of rFlx extended to full array (required by TAF)
910      and shifted to thermodynamics
911    o removed PTRACERS.h in ptracers routine
912    o added surfacetendencyPtr to S/R parameter list pracers_forcing
913    o Correcting initialisations for fVerU, fVerV.
914    o helping TAF to recognize dependency on kUp for
915      fVerU, fVerV
916    o Replacing delZ by delR in pkg/ctrl/
917    checkpoint51o_pre
918    
919    o undid all of cp51 pending some cleanups and discussion
920    o added the [#include "AD_CONFIG.h"] statement to all files that need
921       it for adjoint/tl #defines
922     o re-worked the build logic in genmake2 to support AD_CONFIG.h
923     o removed tools/genmake since it no longer works
924    
925    checkpoint51n_post
926    o modifications to make FREEZE flux visible to pkg/kpp
927      - moved surfaceTendencyTice from pkg/seaice to main code
928      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
929      - subroutine FREEZE now limits only surface temperature
930        (this means new output.txt for global_ocean.90x40x15,
931         global_ocean.cs32x15, and global_with_exf)
932    o added surface flux output variables to TIMEAVE_STATVARS
933    
934    checkpoint51n_pre
935    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
936    o added [#include "AD_CONFIG.h"] to all files that use the following
937      defines:
938      - ALLOW_ADJOINT_RUN
939      - ALLOW_TANGENTLINEAR_RUN
940      - ALLOW_ECCO_OPTIMIZATION
941    
942    checkpoint51m_post
943    o incorporating changes to get TAMC/TAF working in genmake2
944      - added new TAMC/TAF targets to the Makefile
945      - various cleanups related to package handling
946      - these changes should have no impact on the forward model
947    
948    checkpoint51l_post
949    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
950     - faster algorithm for cal_addtime.F
951     - higher precision arithmetic, where needed
952     - pkg/exf *startdate variables changed from calendar date to
953       model integration time
954    
955    checkpoint51l_pre
956    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
957    o enable to apply restoring on S & T only in a latitude band.
958    o update output (external_forcing_surf modif. change truncation errors)
959       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
960    
961    checkpoint51k_post
962    o change default to: useNHMTerms=.FALSE.
963     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
964       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
965     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
966        exp1, ideal_2D_oce
967     - change data file of oceanic exp (leave the results unchanged for now)
968       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
969    o set gravitySign automatically according to the vertical coordinate used
970      (and change sign: back to "logical" value: +1 when R increases downward)
971    o added an include barrier to the default CPP_OPTIONS.h and
972      removed the #include "PACKAGES_CONFIG.h" from it
973    o fix a bug in mom_fluxform (from chk51j_post)
974    
975    checkpoint51j_post
976    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
977    o adjusted some flow directives (dynamics, thermodynamics)
978    o added cubed-sphere case to test cost function
979    o heckpoint_lev?_directives.h now include
980      pkg-specific directives, whenever those are enabled.
981    o Moving pkg-specific flow directives to corresponding pkg
982      Moving pkg-specific differentiation list to corresponding pkg
983      Moving pkg-specific checkpoint-lev storing to corresponding pkg
984      ---> conventions are
985           - pkg_ad.flow
986           - pkg_ad_diff.list
987           - pkg_ad_check_lev?_dir.h
988    
989    checkpoint51i_post
990    o merge of the branch-genmake2
991      - knowingly breaks the older genmake
992      - automatic generation of all ALLOW_${PKG_NAME} defines
993      - new testreport supersedes older testscript
994    o large number of package inclusion and header cleanups
995    checkpoint51i_pre
996    
997    o new output for adjoin of global ocean vector invariant
998    o fix for checkpoint of thermodynamic seaice and bulk_force
999    o Steph gchem various cleanups
1000    
1001    checkpoint 51h_pre
1002    o fixed some single quotes
1003    o modify gchem pkg to be more versatile
1004    o modifications to clean up dic pkg
1005    o add pkg/cfc
1006    
1007    checkpoint51g_post
1008    o provide links for ARPACK and ADM*TLM
1009    o start removing verification/vero/
1010    o update AD-related stuff
1011      (in particular some IF-statements in model/src/ routines)
1012    o adding to verification/global_ocean.90x40x15/ adjoint of
1013      vector invariant setup
1014    
1015    checkpoint51f_post
1016    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1017    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1018      of tracer Green's fucntions for ocean inversion project.
1019    
1020    checkpoint51f_pre
1021    o Added on-the-fly spatial interpolation capability
1022        "USE_EXF_INTERPOLATION" to pkg/exf.
1023      - This is a temporary Cartesian-grid hack until
1024        the super-duper ESMF coupler becomes available.
1025      - See verification/global_with_exf/README for usage example.
1026      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1027        flags and modified pkg/seaice accordingly.
1028    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1029        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1030        non-local transport term.
1031    
1032    checkpoint51e_post
1033    o pkg/mom_vecinv:
1034      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1035      - add time-ave diagnostic of vorticity advection.
1036    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1037    o atmospheric geopotential: - include water vapor effect;
1038                                - use p^kappa in p* scaling.
1039    o land pkg: read initial state from files.
1040    o AIM : add stratospheric drag in the upper level
1041    
1042    checkpoint51d_post
1043    o change function ILNBLNK (=> last non-blank char.) to return zero
1044      (instead of the string length) when the string. char is empty
1045    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1046    o modif's to restore TAMC compatibility
1047      - avoid "_d" constructs in PARAMETER declarations
1048      - avoid interrupting lines by comment lines
1049    o Use cluster local disks for purely local I/O
1050      vs. globally visible disks needed for ctrl stuff
1051      (merged from ecco-branch)
1052      - new active_file_loc... and mdsio_..._loc routines
1053      - affected packages: autodiff, ctrl, grdchk, mdsio
1054    
1055    checkpoint51c_post
1056    o introducing integer flag debugLevel
1057      - debLevZero: suppress all output
1058      - debLevA: standard
1059      - debLevB: equivalent to current debugMode=.TRUE.
1060    o introducing pathname variable mdsioLocalDir for mdsio
1061      that can be specified at runtime
1062      (relevant for cluster I/O to local disk)
1063    `
1064    >>>checkpoint51b_post
1065    adjoint of ptracers
1066    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1067    o extended state in checkpoint_lev?, etc.
1068    o alternative ctrl/cost with tr1 or ptracer
1069    o new comlev1_bibj_ptracers
1070    o new ptracers.flow
1071    o made ptracers_forcing same as external_forcing_s
1072    o added verification for adjoint with ptracers
1073      - adm. grdchk fail so far
1074      - tlm. grdchk OK
1075      - checked tapelev/comlev recomputations: OK
1076    <<<checkpoint51b_pre
1077    
1078    checkpoint51a_post
1079    o added code for biogeochemistry package
1080      - new pkgs: dic, gchem
1081      - new subroutine in ptracers
1082    o modify code for biogeo packages
1083      - in model/src and pkg/ptracers
1084    
1085    checkpoint51
1086    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1087      - autodiff, ctrl, exf, grdchk, seaice
1088      kept separate packages
1089      - cost, ecco, obcs
1090    o updating verification/internal_wave, verification/lab_sea
1091      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1092    
1093    checkpoint50i_post
1094    o Preparing next differentiable checkpoint and sync
1095      of MAIN vs. ecco-branch
1096      - 1st step: this one is differentiable
1097      - 2nd step: next(! not this) checkpoint will have updated packages
1098                  from ecco-branch)
1099    
1100    checkpoint50h_post
1101    o new package "land": provide surface BC for AIM.
1102    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1103    o AIM: use true log-P extrapolation for near surface temp (= as in
1104        F.Molteni paper) ; update aim.5l_cs output.
1105    o New variable in PARM03 for more flexible pickups
1106    o somewhat cleaned package initialisation sequence for
1107      ctrl/ cost/ ecco/ in packages_... routines
1108    
1109    checkpoint50g_post
1110    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1111      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1112      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1113        made the default because of faster convergence than ADI
1114    
1115    checkpoint50f_post
1116    o exf totally restructured
1117      - replaced all exf_set_ routines by one generic exf_set_gen.F
1118        and made sure it's still differentiable
1119      - split exf_getffields.F into new exf_bulkformulae.F
1120      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1121      - updated adjoint/makefile and relevant verif. accordingly
1122    
1123    checkpoint50f_pre
1124     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1125          + change Evap over land. (update aim.5l_cs output)
1126     o added missing .cvsignores and made uniform across expts
1127     o changed configuration of tidal_basin_2d expt
1128     o added pkg/debug functions for tracing code in fatal crashes
1129     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1130     o new fn in pkg/monitor to stop model if solution grows too big
1131     o removed lots of single quotes from comments
1132    
1133    checkpoint50e_post
1134    o make KPP work with PTRACERS
1135     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1136       nearly a copy of kpp_transport_s
1137     - there is no analogue to SurfaceTendencyS, so I have to use
1138       gPtr(of the surface layer) instead
1139    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1140    checkpoint50e_pre
1141    
1142    checkpoint50d_post
1143    o change kpp output from multiple-record state files to single-record state
1144      files analogous to write_state.F
1145    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1146      analogous to the cg2d-related output.
1147    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1148      so that writing to internal file fn (with length 512) fails.
1149    checkpoint50d_pre
1150    
1151    checkpoint50c_post
1152    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1153    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1154    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1155    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1156    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1157    
1158    checkpoint50c_pre
1159    Merging from release1_p13:
1160    o bug fix for pkg/seaice dynamic solver
1161    o Added SEAICE_initialHEFF to pkg/seaice
1162    
1163    checkpoint50b_post
1164    o store u*,v* in gU,V instead of in guNm1,gvNm1
1165    o in order to put the momForcing out of the Adams-Bashforth:
1166      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1167      to timestep.F
1168    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1169    o re-generate output for highly sensitive test-exp:
1170       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1171    
1172    checkpoint50b_pre
1173    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1174    o corrected CPP option mismatch in exf_Bulk... functions for case
1175      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1176    
1177    checkpoint50a_post
1178    o Bug fix for merging between c50 and KPP.
1179      ikey was passed from thermodynamics to kpp_calc via
1180      common block rather than being recomputed in kpp_calc,
1181      in contradiction with new key itdkey.
1182      New key ikppkey created, and tamc.h headers updated.
1183    
1184    checkpoint50
1185    - 2nd step of merge with ecco-branch:
1186      merge changes in ecco-branch back into main trunk
1187    - bug fix in find_alpha
1188    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1189    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1190    - merged some sliced AD support routines
1191    
1192    checkpoint49
1193    merged from ecco-branch:
1194    o exf:
1195      - Enable initialisation of forcing fields to constant
1196        (runtime) values.
1197      - in exf_getffields.F
1198        Reduce i-/j-loop to interior domain, discarding overlaps.
1199        That also fixes wrong TAF-key computations for key_1, key_2
1200        with bulf formulae.
1201      - exf_init.F modify #ifdef for exf_init_evap
1202      - exf_getffieldrec.F, ctrl_getrec.F
1203        The following INT-usages are not safe:
1204          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1205          fldcount = int(fldsecs/fldperiod) + 1
1206        and were modified.
1207    o autodiff: checkpoint_lev...
1208      - updated storing for bulk formulae (some arrays were missing)
1209      - added state for seaice package
1210      - synchronized with main branch
1211    o DIVA:
1212      Modif.s in
1213      - the_main_loop.F
1214      - the_model_main.F
1215      and added cost_final_restore.F cost_final_store.F
1216      o With these changes, it is possible to fully separate
1217        the first forward run to compute the cost function (mdthe_main_loop)
1218        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1219        into separate model executions.
1220        This enables better tuning of DIVA to given queue sizes.
1221      o Loss of cost function value in consecutive DIVA runs is
1222        fixed by storing to 'costfinal' file.
1223      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1224        beginning/end of adjoint integration is accounted for.
1225      The current changes apply to TAF-1.4.26.
1226      TAF has one remaining bug, requiring one manual change
1227      (see MITgcm manual).
1228    o cal: synchronized between MAIN and ecco-branch
1229    
1230    checkpoint48i_post
1231    o Changes to restore differentiability of code w.r.t. previous tag
1232      (mostly adding new routines to make list and replacing
1233      pressure by totPhiHyd).
1234    o Updated and merged grdchk package
1235      - has both ADM and TLM checks
1236      - works for single- and multi-proc.
1237      - output cleaned
1238      - worked successfully for parallel DIVA
1239    o genmake:
1240      - Adding -platform=SP4
1241      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1242    o Modif. for DIVA:
1243      ctrl_unpack should not be called in intermediate DIVA interval.
1244      (similar thing would apply for active files such as
1245      tbar, sbar, psbar, which should not be reinitialised;
1246      only relevant for ecco-branch)
1247    
1248    checkpoint48h_post
1249    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1250    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1251    o Added SEAICE_initialHEFF to pkg/seaice
1252    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1253    
1254    checkpoint48g_post
1255    --- EOS:
1256    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1257      store total Potential in totPhyHyd for diagnostics & EOS.
1258    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1259    --- Pressure/geopotential gradient:
1260    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1261    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1262      ( changes results of global_ocean_pressure )
1263    o NLFS + z-coord.: add eta*Rho' contribution.
1264    o accurate phiHyd when using interface-W at the middle between 2 centers
1265     ( changes results of ideal_2D_oce )
1266    o includes r* 2nd term in potential gradient.
1267    
1268    checkpoint48f_post
1269    Merging from release1_p12:
1270    o Modifications for using pkg/exf with pkg/seaice
1271      - improved description of the various forcing configurations
1272      - added basic radiation bulk formulae to pkg/exf
1273      - units/sign fix for evap computation in exf_getffields.F
1274      - updated verification/global_with_exf/results/output.txt
1275    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1276      (SBO) core products, including oceanic mass, center-of-mass,
1277      angular, and bottom pressure (see pkg/sbo/README.sbo).
1278    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1279      to avoid negative values in shallow regions.
1280      - updated verification/natl_box/results/output.txt
1281      - updated verification/lab_sea/results/output.txt
1282    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1283    o Added useSingleCpuIO option (see PARAMS.h).
1284    o Updated useSingleCpuIO option in mdsio_writefield.F to
1285      work with multi-field files, e.g., for single-file pickup.
1286    o pkg/seaice:
1287      - bug fix in growth.F: QNET for no shortwave case
1288      - added HeffFile for specifying initial sea-ice thickness
1289      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1290    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1291      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1292    o pkg/seaice:
1293      - adjoint-friendly modifications
1294      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1295    
1296    checkpoint48e_post
1297    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1298    o dynamics: change definition of computational domain & adapt mom_fluxform
1299      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1300    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1301        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1302        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1303        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1304        inverted_barometer solid-body.cs-32x32x1
1305      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1306    
1307    checkpoint48d_post
1308    o in preparation for r*:
1309     a) use pre-computed gradient of hydrostatic potential:
1310        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1311     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1312        => affects results of glob_oce_pressure (different truncation error)  
1313      update output.txt of ideal_2D_oce & global_ocean_pressure
1314    
1315    checkpoint48d_pre
1316    o in preparation for r*:
1317      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1318      pass the 2 comp. of the grad. as arguments to momentum S/R.
1319      but for the moment, only used if it does not change the results.
1320    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1321    
1322    checkpoint48c_post
1323    Modifications in treatment of initial flux forcing controls
1324    to avoid extra storing of flux fields.
1325    
1326    checkpoint48c_pre
1327    o Added tidal_basin_2d experiment (currently 1D!)
1328    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1329    
1330    checkpoint48b_post
1331    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1332     (modification to pressure gradient not yet implemented)
1333    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1334      (for U & V) that are used for vertical advection of momentum.
1335    
1336    checkpoint48a_post
1337    o In preparation for r*, use temp. array to compute vertical transport
1338       in flux-form momentum pkg. => change results of few test-exp.
1339      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1340                        lab_sea, natl_box & plume_on_slope
1341    
1342    checkpoint48
1343    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1344    
1345    checkpoint47j_post
1346    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1347    o moved adexch from forward_step to addummy_in_stepping
1348    o added exch in ctrl_map_...
1349    o aveFreq.=0. at end of cost_final to avoid overwrite in
1350      reverse checkpointing loop
1351    o Yet more changes in gmredi:
1352      * adgmredi_calc_tensor
1353        avoiding all recomputation of gmredi_slope_limit
1354      * adgmredi_x/y/rtransport
1355        added flag for excessive storing to avoid recomp. of
1356        u/v/rtans, dTdx/y/z
1357        -> this is not really necessary and very memory-consuming
1358      * adgmredi_slope_psi:
1359        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1360      * gmredi_slope_limit
1361        re-activated full calculation of taperfct for case 'ac02'
1362    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1363    
1364    checkpoint47i_post
1365    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1366    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1367      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1368    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1369    o gmredi: fix few bugs.
1370    
1371    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1372    This will be a good checkpoint to plug into the ecco-branch.
1373    o few modif.'s to get latest version adjointed
1374      (mainly kick out code in ini_linear_phisurf)
1375    o modif's to run adjoint with exactConserv
1376    o case GM_BOLUS_ADVEC should be cleaned
1377      S/R gmredi_slope_psi should be cleaned
1378    o verification/carbon now has exactConserv=.TRUE.
1379    
1380    checkpoint47g_post
1381    o time-average AIM output: becomes independent from statvars time-average
1382      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1383    o After TAF bug fix:
1384      Tested adjoint of gmredi package.
1385      Tests were done with checkpoint47 rather than with latest
1386      checkpoint47f_post since the latter is broken for the adjoint
1387      verification/carbon/ contains both ADM and TLM gradient checks.
1388    Here they are, before they get changed/lost/stolen.
1389    Mostly modif.'s to fix numerical sensitivities.
1390    Gradient checks OK for
1391    - GM_taper_scheme:
1392      * clipping
1393      * ac02
1394      * linear
1395      * glw91
1396      * dm95
1397      * ldd97
1398    - GMREDI_OPTIONS:
1399      * GM_VISBECK_VARIABLE_K
1400      * GM_NON_UNITY_DIAGONAL
1401      * GM_EXTRA_DIAGONAL
1402      * GM_BOLUS_ADVEC
1403    in conjunction with data.gmredi parameters to be checked in
1404    in a few minutes under verification/carbon/code/
1405    
1406    checkpoint47f_post
1407    Merging from release1_p10:
1408    o modifications for using pkg/exf with pkg/seaice
1409      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1410        and SEAICE_EXTERNAL_FLUXES
1411      - pkg/exf CPP options EXF_READ_EVAP and
1412        EXF_NO_BULK_COMPUTATIONS
1413      - usage examples are Experiments 8 and 9 in
1414        verification/lab_sea/README
1415      - verification/lab_sea default experiment now uses
1416        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1417    
1418    checkpoint47e_post
1419    o created a tag prior to creating a branch
1420    
1421    checkpoint47d_post
1422    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1423      at the bottom boundary had an erroneous half slip boundary condition
1424    o added bottom drag and no slip boundary condition capabilities to
1425      oceanic pressure coordinates code
1426    o added new verification experiment global_ocean_pressure, this experiment is
1427      also described in the tutorial section of the manual
1428    checkpoint47d_pre
1429    
1430    checkpoint47c_post
1431    o Added a verification experiment for a global cubed-sphere ocean run
1432      -  verification/global_ocean.cubed32x32x30
1433      -  uses pkg/therm_seaice and pkg/bulk_forcing
1434    
1435    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1436    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1437      when using P-coordinate; only implemented for atmospheric config.
1438    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1439      NOTES: requires option NONLIN_FRSURF to be "#define".
1440    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1441    
1442    checkpoint47b_post
1443    Merging from release1_p9:
1444    o pkg/seaice
1445      - removed GOTO's and added taf directives
1446      - double precision constants to reduce the g77 (Linux)
1447        to F77 (SGI) differences reported in release1_p8
1448    o tools/genmake
1449      - added SGI options
1450    o verification/testscript
1451      - updated to that of checkpoint47a_post
1452    o verification/global_ocean.90x40x15/input/eedata
1453      - modified for SGI f77 compatibility
1454    o verification/lab_sea
1455      - added description of sea-ice model
1456      - added missing matlab routines
1457      - added test of thermodynamics parallelization
1458    
1459    checkpoint47a_post
1460    o new pkg: aim_v23
1461     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1462       for now, keep the same surface forcing as before.
1463     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1464     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1465     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1466    o add diagnostic of surface correction term in monitor output
1467    
1468    o bulk_force and therm_seaice
1469    - Two packages:  bulk_force (Bulk forcing)
1470      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1471    - Earlier integration from Stephaine Dutkiewicz
1472      and Patrick Heimbach.
1473    - Two ifdef statements for compile time,
1474       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1475    
1476    checkpoint47
1477    differentiable version of checkpoint46n_post
1478    o bug fix in quasihydrostaticterms
1479    o * "clean" adjoint code (in terms of extensive recomputations)
1480        can now be obtained for all GMREDI options (i.e. for
1481        - GM_VISBECK_VARIABLE_K
1482        - GM_NON_UNITY_DIAGONAL
1483        - GM_EXTRA_DIAGONAL
1484        - GM_BOLUS_ADVEC )
1485      * However, wrong gradient check problem remains unsolved.
1486      * New CPP options have been introduced for different
1487        tapering schemes
1488    o external_fields_load now part of differentiation list
1489    o pressure needs multiple storing;
1490      would be nice to have store_pressure at beginning or
1491      end of forward_step, e.g. by having phiHyd global (5-dim.)
1492      (NB: pressure is needed for certain cases in find_rho,
1493      which is also invoked through convective_adjustment).
1494    o recomputations in find_rho for cases
1495     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1496    o #define ATMOSPHERIC_LOADING should be differentiable
1497    o ini_forcing shifted to begining of initialise_varia
1498    o Incorporating QNVS line search routines into MITgcm
1499      (this is separate code, and therefore not under pkg)
1500      lsopt/, optim/
1501    o Updated verification/carbon/
1502      - #define GM_VISBECK_VARIABLE_K
1503      - GM_taper_scheme    = 'ldd97'    
1504    
1505    checkpoint46n_post
1506    Merging from release1_p8:
1507    o verification/natl_box:
1508      updating new external_fields_load routine
1509    o New package: pkg/seaice
1510      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1511      The sea-ice code is based on Hibler (1979-1980).
1512      Two sea-ice dynamic solvers, ADI and LSR, are included.
1513      In addition to computing prognostic sea-ice variables and diagnosing
1514      the forcing/external data fields that drive the ocean model,
1515      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1516      The implied surface heat flux is then stored in variable
1517      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1518      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1519      non-local transport term.  Because this call precedes model
1520      thermodynamics, temperature under sea-ice may not be "exactly" at
1521      the freezing point by the time theta is dumped or time-averaged.
1522      N.B.: fairly large differences in accuracy occur across
1523            different platforms/compilers; comparison between
1524            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1525            generated output gives:
1526       T           S           U           V
1527      C D M    c        m  s        m  s        m  s        m  s
1528      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1529      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1530      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1531    
1532      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1533    o GAD:
1534      - generated new common blocks to account for call of
1535        same gad routines with differing traceridentities
1536        (needed to modify tracerIdentity indices in GAD.h)
1537      - generated separate common blocks for case useCubedSphereExchange
1538        (Department of Futurology)
1539      - parameter lists to gmredi_?transport: added tracerIdentity
1540      - added new key indices to tamc.h
1541    o external_fields_load:
1542      - added this routine to TAF list
1543      - needed to make some common blocks global and additional storing
1544        along the same lines as exf package (checkpoint_lev?_directives.h)
1545    o exf:
1546      updated external forcing package
1547      - bug fixes carried over from ecco-branch
1548        (missing OBCS_OPTIONS.h in two routines)
1549      - enable easy to use "no forcing".
1550      - added exf I/O for atmospheric loading
1551      - added exf I/O for runoff data
1552      - transfered scaling between exf <-> MITgcm to exf namelist
1553    o Adding new verification experiment global_with_exf.
1554      This verification experiment is almost identical to the
1555      global_ocean.90x40x15 experiment, except that it uses
1556      the exf (and cal) package instead of the
1557      external_fields_load routine (cf README file).
1558    
1559    checkpoint46m_post
1560    o modified testscript to return -- when there are no lines of "%MON" output
1561    o added new flag "quasiHydrostatic" for QH mode
1562      and new routine quasihydrostaticterms()
1563    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1564      New routine: mom_u_coriolis_nh()
1565    o fixed sign of non-hydrostatic metric terms in u and v equations.
1566      Depend on correct sign of gravitySign.
1567    o added work.pc* to .cvsignore in aim directories using ifc
1568    o introduced flag for controllin non-hydrostatic metric terms
1569    o removed gravitySign from PARM04
1570    o switched to g77/ifc from pgf77 in aim experiments
1571    
1572    checkpoint46l_post
1573    o made convective adjustment work with pressure coordinates:
1574     - changed the direction of k-loop in convective_adjustment.F for the
1575       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1576     - adjusted the reference pressure k-index in convective_adjustment.F
1577     - adjusted the convection condition in convect.F (in analogy to
1578       calc_ivdc.F)
1579     - convective_adjustment no longer computes anything on the halos
1580     - removed the warnings about negative salinity from find_rho.F and
1581       find_alpha.F; instead the new routine look_for_neg_salinity, called
1582       at the beginning of find_rho, find_alpha, and find_beta, does a
1583       check of the entire slice, if CPP-option
1584       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1585    checkpoint46l_pre
1586    
1587    checkpoint46k_post
1588    o fixed the verification/global_ocean.90x40x15 experiment:
1589     - new bathymetry (the world according to A., JMC, and M.)
1590     - new initial fields and forcing fields (*.bin files)
1591     - new POLY3.COEFFS (for the next release one should switch to a full
1592       equation of state: JMD95P or MDJWF)
1593     - fixed several errors and redundancies in the data file
1594     - experiment uses looped cells
1595     - added matlab directory with diagnostic scripts for plotting of output
1596    
1597    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1598     - read AIM physics parameters from a file (data.aimphys)
1599     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1600    
1601    checkpoint46j_post
1602    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1603    o move wVel computation at the end of the time step, in S/R integr_continuity
1604    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1605    o update timeave pkg for wVel diagnostic.
1606    checkpoint46j_pre
1607    
1608    checkpoint46i_post
1609    o Clean up AIM package (and keep the results unchanged):
1610      include CPP_OPTION and use IMPLICT NONE in all routines ;
1611      declare all the variables _RL ; use _d 0 for all numerical constants.
1612      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1613    
1614    checkpoint46h_post
1615    o cleaned up the use of rhoNil and rhoConst.
1616      - rhoNil should only appear in the LINEAR equation of state, everywhere
1617        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1618        and the dynamical equations are all divided by rhoConst
1619    o introduced new parameter rhoConstFresh, a reference density of fresh
1620      water, to remove the fresh water flux's dependence on rhoNil. The default
1621      value is 999.8 kg/m^3
1622    o cleanup up external_forcing.F and external_forcing_surf.F
1623      - can now be used by both OCEANIC and OCEANICP
1624    checkpoint46h_pre
1625    
1626     Added code to convert surface volume flux (fresh water) into
1627     a mass flux when using P coordinates in the ocean (OCEANICP).
1628     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1629    
1630    checkpoint46g_post
1631    o Include a new diagnostic variable phiHydLow for the ocean model
1632      - in z-coordinates, it is the bottom pressure anomaly
1633      - in p-coordinates, it is the sea surface elevation
1634      - in both cases, these variable have global drift, reflecting the mass
1635        drift in z-coordinates and the volume drift in p-coordinates
1636      - included time averaging for phiHydLow, be aware of the drift!
1637    o depth-dependent computation of Bo_surf for pressure coordinates
1638      in the ocean (buoyancyRelation='OCEANICP')
1639      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1640        Theta, Salinity, and Pressure in the parameter list. This routine is
1641        presently contained in find_rho.F. This routine does not give the
1642        correct density for 'POLY3', which would be a z-dependent reference
1643        density.
1644    o cleaned up find_rho
1645      - removed obsolete 'eqn' from the parameter list.
1646    o added two new verification experiments: gop and goz
1647      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1648    checkpoint46g_pre
1649    
1650    checkpoint46f_post
1651    o Enable tangent linear (forward mode) gradient checks:
1652      - extended active file handling to g_... files
1653      - added TANGENT_SIMULATION to theSimulationMode
1654      - extended grdchk package accordingly
1655    o added tangent linear setup in verification/carbon/code_ftl
1656    o added adjoint setup in verification/front_relax/code_ad
1657    
1658    checkpoint46e_post
1659    o Added new equation of state -> MDJWF
1660      - EOS of McDougall et al., 2002, JAOT, submitted
1661      - caveat: the equation of state is only valid for a smaller (more
1662        realistic?) range of values than JMD95P/Z and UNESCO
1663      - added masks to the calculation of pressure in store_pressure
1664      - added more check values for density in check_eos (ini_eos.F), some of
1665        the old check values are out of the range of the MDJWF-eos, so don't
1666        expect perfect matches for those
1667    checkpoint46e_pre
1668    
1669    checkpoint46d_post
1670    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1671      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1672      case of pressure coordinates. eosType='JMD95Z' in
1673      combination with buoyancyRelation='OCEANICP' now causes an error.
1674    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1675      in find_alpha/beta.
1676    checkpoint46d_pre
1677    
1678    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1679      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1680    
1681    checkpoint46c_post
1682    o Changes necessary for ocean in p-coordinates
1683     -  Added new buoyancy relation = 'OCEANICP'
1684     -  Added new parameters = gravitySign (this used to be contained inside
1685        the factor dRdZ which I added when we first switched to R coordinates).
1686     X GM/Redi is not compatible (yet)
1687     X bottom drag and no-slip need to be debugged.
1688    checkpoint46c_pre
1689    
1690    checkpoint46b_post
1691    o Added new equation of state -> JMD95Z and JMD95P
1692      - EOS of Jackett and McDougall, 1995, JAOT
1693      - moved all EOS parameters into EOS.h
1694      - new routines ini_eos.F, store_pressure.F
1695    o Added UNESCO EOS, but not recommended because it requires
1696      in-situ temperature (see JMD95)
1697    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1698      unesco.f to be used with POLY3
1699    checkpoint46b_pre
1700    
1701    checkpoint46a_post
1702    o Added (atmospheric) pressure loading
1703      - new field in FFIELDS.h, etc...
1704      - new cpp flag ATMOSPHERIC_LOADING
1705    o Changed hFacC to _hFacC in calc_phi_hyd.F
1706    o Added SHORTWAVE_HEATING to some files for consistency
1707    checkpoint46a_pre
1708    
1709    checkpoint46
1710    further merges from release1_p5
1711    o new ctrl package
1712      - adopted from ECCO environment to enable optimization
1713      - added Eliassen Palm fluxes to controls
1714    o added Eliassen Palm flux controls to gradient check package
1715    o cost package
1716      - Compatible with new ctrl package
1717      - added Eliassen Palm cost hooks
1718      - modif's of existing cost functions
1719    o Adjoint-related bug fixes in kpp:
1720      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1721      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1722    o autodiff package
1723      - flow directives:
1724        + new for S/R do_the_model_io
1725        + enhanced for S/R checkpoint
1726        + new gmredi.flow
1727      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1728        disable adcommon.h/g_common.h by default.
1729      - fixed problem for adjoint of global_max
1730    o modified verification/carbon/
1731    o New setup for adjoint of global_ocean
1732    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1733    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1734    o incorporated hooks for sponge layer code (external_forcing.F)
1735    
1736    checkpoint45d_post
1737    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1738    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1739      (affects plume_on_slope "cg2d" output)
1740    o add new parameter deltaTfreesurf for free-surface time stepping
1741    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1742    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1743    o change phiMin in exp1 (to agree with documentation)
1744    o add new flags:
1745     - T,S forcing inside/outside Adams-Bashforth
1746     - turn off temp,salt advection and/or forcing
1747     - for each tracer, define internal flag for multiDimAdvection & A-B
1748    o monitor: change definition of KE to check conservation of Energy
1749    
1750    checkpoint45c_post
1751    o Removed f90 comments ("!")
1752    o Modified initialisations to enable exf package for MITgcm
1753      (without invoking ECCO_PACKAGE).
1754    o modifications to gradient check package (Martin Losch)
1755      - enable centered differences
1756      - modified format of standard output
1757    
1758    checkpoint45b_post
1759    o cleaned exchange calls in cg2d
1760    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1761    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1762      to configure barotropic setup (Martin Losch)
1763    o moved some initialisations within bi,bj loop in dynamics
1764      (TAF flow dependency)
1765    o in initialise_varia, moved call packages_init_variables
1766      before convective_adjustment_init
1767      (corresponding adjustment of TAF tape initialisation).
1768    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1769    
1770    checkpoint45a_post
1771    o compute Rho over the whole domain (extend iMin,jMin indices)
1772    o specific exchange for X-slice domain (case Ny=1)
1773    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1774    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1775    
1776    checkpoint44h_post = checkpoint45
1777    o Fix to restore differentiability:
1778      place at which packages_init_variables is called in
1779      initialise_varia is crucial for reverse control flow.
1780    o modifications in GMRedi to enable stable adjoint
1781      (corresponding modif's in thermodynamics, dynamics)
1782    o added missing hook for sponge layer code in external_forcing
1783    o modified test cost functions
1784    o storing in gad_advection (plus removal of write(0,*)!
1785    o missing headers TR1.h added in convective_adjustment routines
1786    o errorMessageUnit set non-equal zero in eeboot
1787      (conflict on some platforms, e.g. IBM SP3)
1788    o modified carbon verif.
1789    
1790    checkpoint44h_pre
1791    o vertical grid option: allow to put the Interface at the middle between
1792      2 cell-centers ; replace delZ in pkg/kpp by drF.
1793    o GM Advective form: Tracers are advected using the residual transport (=
1794      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1795    
1796    checkpoint44g_post
1797    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1798      results) ; ifdef missing in thermodynamics.F
1799    
1800    checkpoint44f_pre,checkpoint44f_post
1801    o added PTRACERS package
1802      This allows an arbitrary number of passive tracers to be integrated
1803      forward simultaneously with the dynamicaly model.
1804      + Implemented so far:
1805        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1806        - I/O and checkpointing
1807        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1808      + Not implemented so far:
1809        - KPP
1810        - OBCS
1811      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1812        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1813        line in data.pkg.
1814      + This package is disabled by default since it increases storage.
1815    
1816    
1817    o testscript: added -cleanup option
1818    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1819                 b) enable to filter 2D fields.
1820    
1821    checkpoint44e_pre,post
1822    o re-wrote convective adjustment to use pre-calculated weights
1823      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1824      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1825      Original calls to convect() still in place.
1826    
1827    chkpt44d_pre,post
1828    o added missing EXCLUDE_MONITOR flags
1829    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1830      (incompatible typ in MIN/MAX expressions caused problems
1831      on IBM SP3)
1832    o in genmake added variable MAKEDEPEND
1833      plus resetting for case SunOS
1834    o added timer_stats.c routine for IBM SP3
1835    o removed variables in dynamics
1836    !!! I forgot to create tag chkpt44d_pre !!!
1837    !!! But chkpt44d_pre = chkpt44c_post    !!!
1838    
1839    o real fresh water flux implemented with non-linear free-surface.
1840    
1841    chkpt44c_pre,post
1842    o few fix (mask in shap_s2, EmPmR in external_field_load,
1843      USE_NATURAL_BCS in solve_for_P);
1844    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1845    
1846    checkpoint44b_pre/_post
1847    o merge of relevant stuff from the ecco-branch:
1848      - genmake: removed $S64 overwrite for case SunOS
1849      - pkg/exf: update and corrections for field swapping and obcs
1850      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1851                  harmonized between ECCO and MITgcm
1852      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1853                      updated checkpointing_lev... lists for obcs
1854      - model/src: minor changes in forward_step, plot_field
1855                   added directive for divided adjoint in the_main_loop
1856      - pkg/mdsio: added mdsio_gl_slice
1857    
1858    o check parameters & config (chkpt44a_pre,post)
1859    o OBC and NonLin_FrSurf.
1860    
1861    checkpoint44
1862    o fix bug in mom_vi_del2uv
1863    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1864    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1865    o update AIM experiments (NCEP input files)
1866    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1867    o added some stuff for AD
1868    
1869    checkpoint43
1870    o added two new advection tests
1871    o added global 4x4 degree ocean test
1872    o added test of H&S94 with free surface on cube
1873    o some final mods for gradient check, adjoint,...
1874    
1875    checkpoint42
1876      Fixed AD-related problems:
1877    o Store directives up-to-date with re-arranged Adams-Bashforth
1878      (mainly thermodynamics.F)
1879    o New store directives for multi-dim. advection schemes
1880      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1881      * new common block and key passkey
1882      (mainly gad_advection.F)
1883    o Modified store directives for split of dynamics/thermodynamics
1884      for the case ALLOW_KPP
1885    o Cleaned argument list for timestep_tracer.F
1886    
1887    checkpoint41
1888    o re-formatted/added comments in prologues of key subroutines
1889      to work with protex
1890    
1891    checkpoint40
1892    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1893    o added FLT (floats) package from Arne along with demo. experiment
1894    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1895      implementation of forward-in-time forcing terms
1896    o more mods for non-linear free-surface including new variable
1897    o modified multi-dim method to work on cube
1898    o bug fix in KPP (from DM)
1899    
1900    checkpoint40pre9
1901    o added DST advection schemes
1902    o fix MPI bug on SGI's
1903    o modifications for non-linear free-surface
1904    o fixed conditionals for fixed flow/passive tracer only mode
1905    o added tension/strain form of stress tensor
1906    o changes to commenting of arguments for TAF/TAMC
1907    o added/updated many matlab scripts
1908    o added multi-dimensional advection method for tracers
1909      
1910    checkpoint40pre8
1911    o new package rw/
1912      Added method for dumping intermediate local arrays:
1913      mdsio_writetile - same as mdsio_writefield except works from inside
1914                        bi,bj loop
1915      mdsio_writelocal - same as mdsio_writetile except works for local
1916                         arrays
1917      write_local_r? - higher-level wrapper for mdsio_writelocal
1918      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1919      Example given at end of mom_vecinv.F that dumps some local arrays.
1920    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1921      control flux-form versus vector invariant code.
1922      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1923      or genmake -DISABLE ...
1924    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1925      (additional storing is now needed for case vecinv;
1926      currently nothing implemented to switch this storing off
1927      in case fluxform is used since no CPP flag available).
1928    
1929    checkpoint40pre7
1930    o bug fix in dynamics.F
1931      calc_viscosity called before k=1,Nr loop.
1932    o added some #ifdef's ALLOW_PASSIVE_TRACER
1933    o cleaned initialisations in ctrl_map_ini
1934      related to TAF
1935    
1936    checkpoint40pre6
1937    o split dynamics into thermodynamics & dynamics
1938    o corresponding split of calc_diffusivity into
1939      calc_diffusivity, calc_viscosity
1940      (kpp_calc_diff, kpp_calc_visc).
1941    o Added diffkr, kapgm to control variables
1942    o bug fix in gmredi_slope_limit for ldd97
1943    
1944    checkpoint40pre5
1945    o proper initialization of Adams-Bashforth time stepping
1946      + uses forward step for very first step of model (iter=0)
1947    o re-generated *all* output since almost all output is modified by this
1948      change (sorry but we've been putting this one off for about 2 years)
1949      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1950        *not* regenerated since they are already out of date and I don't
1951        want to create the impression that they are suddenly working.
1952    o removed KAP stuff for DEC's
1953    o modified/added many .cvsignore files in */code and */input
1954    o added new expt "solid-body.cs-32x32x1"
1955      + this uses an alternative form of ini_curvilinear_grid.F which
1956        is not necessarily any better than the current one...
1957    
1958    checkpoint40pre4
1959    o added re-initialisations of utrans,vtrans,rtrans in
1960      calc_common_factors which are crucial for TAF.
1961    o extended iMin,jMin range for calc_common_factors,
1962      calc_diffusivity
1963    o added option ALLOW_PASSIVE_TRACER
1964    o a few minor updates and fixes
1965    
1966    checkpoint40pre3
1967    o created calc_gtr1.F for gad package
1968    o split the_main_loop and re-introduced forward_step
1969    o some recomputations of nIter0 for TAMC
1970    
1971    checkpoint40pre2
1972    o Updated to latest branch of AJA, JMC
1973    o Added gradient check package
1974    o Added routines for passive tracer handling
1975    o Added carbon sequestration sensitivity experiment
1976    
1977    checkpoint39
1978     o Modifications and fixes to support TAMC
1979       (mainly missing or wrong directives)
1980     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1981       in addummy_in_stepping
1982     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1983     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1984     o Included following packages:
1985       cal: calendar
1986       exf: external forcing
1987       ecco: essential routines to control use of cal, exf
1988             (NB: this is not the full ECCO environment)
1989     o disabled some packages by default in genmake
1990    
1991    checkpoint38
1992     o see notes_c37_adj.txt
1993     o corrected wrong layer index in external_forcing_t
1994     o replaced the_main_loop/forward_step by the_main_loop
1995     o removed forceoutput from write_state
1996       (replaced criteria for initial/final state)
1997     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1998    
1999    checkpoint37
2000     o mdsio.F routine split and packaged in pkg/mdsio
2001       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2002        used unless genmake -disable=mdsio)
2003     o allow a more precise surface-geopotential gradient for the atmosphere
2004       taking into account the change in space of Alpha (=1/rho) at the surface.
2005     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2006       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2007     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2008       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2009       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2010     o Time-Average diagnostics defined as a pseudo package "timeave".
2011     o pickup files : old pickup (before c35) did not work with new code (c35
2012       and after) unless activating 2 commented lines in initialise-varia.
2013     o Non-Hydrostatic pickup file Pb fixed.
2014     o bug with Rigid-lid version (since c35) fixed.  
2015    
2016    checkpoint36
2017     o implement Crank-Nickelson barotropic time-stepping
2018     o recover Time-Average diagnostics
2019     o fix Pb in checkpoint (PR#19)
2020     o AIM become a standard package ; clean unused CPP_kees
2021    
2022    checkpoint35
2023     o subtantial rewrite of dynamics.f
2024     o allows staggered time-stepping
2025     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2026     o added bottom drag (linear + quadratic)
2027    
2028    checkpoint34
2029     o Modified exchange routines for correct reverse simulation.
2030     o Added verification output to comply with bug fix in impldiff.F
2031       as of c33 (exp2, natl_box).
2032     o Corrected store directives in dynamics.F
2033     o Corrected array boundaries in impldiff.F
2034     o Corrected array dimensions in gmredi.
2035       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2036     o Added routine GLOBAL_SUM_INT to global_sum.F
2037     o Added mdsio_gl.F for ECCO purposes.
2038    
2039    checkpoint33
2040     o Fixed bug in lower BC in impldiff.F
2041     o Fixed confusion about units of forcing arrays in FFIELDS.h
2042       namely Fu,Fv,Qnet,Qsw,EmPmR:
2043       - Removed verification/natl_box/code/external_fields_scale.F
2044         (did not differ from that in model/src)
2045       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2046         (see FFIELDS.h for description)
2047       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2048         kpp_calc.F and kpp_transport_t.F
2049       - Removed model/src/external_fields_scale.F and calls to it
2050       - verification/natl_box uses flux data with "atmospheric" sign so
2051         a special version of external_fields_load.F is used to
2052         change the data as it's read in. This way, the arrays
2053         have the right units and signs at all times tha a user could
2054         possibly use them.
2055     o Corrected genmake to delete a temporary file during configuration
2056    
2057    checkpoint32
2058     o Scaling of forcing fields moved from external_forcing.F to
2059       external_fields_scale.F, called directly after loading fields.
2060     o Surface relaxation terms added to surface tendency fields in
2061       extra subroutine.
2062     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2063       fields.
2064     o Changes in GMRedi to comply with packaging structure.
2065     o Modifications and bug fixes in KPP package.
2066     o Verification experiment for KPP added (verification/nat_box/)
2067    
2068    checkpoint31
2069     o Packages interface brought in line with defined standard
2070       -> new routines packages_...F
2071       -> changes in initialise_fixed.F, initialise_varia.F
2072       -> enables initialisation interface for ECCO package
2073     o Rescaling of external forcing fields immediately after read
2074       (removed from external_forcing.F)
2075       -> new: surface_fields_scale.F
2076       -> affects ini_foorcing.F, external_fields_load.F
2077     o Computation of surface tendencies before tendency updates.
2078       -> new: external_forcing_surf.F
2079     o Change of variable names useGMRedi, useKPP, useECCO
2080     o Further changes in dynamics.F, impldiff.F for TAMC
2081     o Tested for experiments 0, 2, 4.
2082       - not yet tested for GMRedi.
2083       - not yet tested for KPP.
2084    
2085  checkpoint30  checkpoint30
2086   o Updates for OBCs   o Updates for OBCs
2087   o New experiment for test OBCs (internal_wave)   o New experiment for test OBCs (internal_wave)

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