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revision 1.32 by adcroft, Thu Nov 30 16:51:40 2000 UTC revision 1.836 by gforget, Fri Jun 15 20:49:59 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o dependencies: pkg/profiles requires pkg/cal
8    o pkg/profiles:
9     - added option ALLOW_PROFILES_GENERICGRID
10         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
11         that interpolation information (grid points and coefficients) is provided
12         within the netcdf input files.
13         -> sample matlab scripts can be found in MITgcm_contrib/gael
14         that allow you to prepare netcdf input files.
15     - also modified: cleaner include statements, cleaner error print statements,
16       cleaner stops when error, and more tests of the netcdf input files consistency.
17    
18    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
19    o pkg/seaice:
20     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
21       requires a new routine: seaice_diagnostics_fill.F
22     - make sure that seaice does not move if not forced (pressure replacement
23       method, Hibler and Ip, 1995), changes results
24     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
25     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
26       It is turned off by default (=-1.), because it changes the results.
27     - make it possible to read AREA from a file, too.
28    
29    checkpoint59c
30    o add S/R and diagnostics for oceanic mixed-layer depth
31    o move GMRedi call after all vertical mixing schemes (including KPP)
32    o pkg/thsice:
33     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
34      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
35    o pkg/obcs:
36     - bug fix for balance code
37    o pkg/seaice:
38      - allow values of SEAICE_elasticParm > 1
39      - add new parameter SEAICE_evpTauRelax as an alternative
40        to SEAICE_elasticParm
41      - make lsr boundary conditions free slip (by default), changes result
42      - add code for no slip boundary conditions for lsr
43      - set minimum of zeta to zero (and not 4e8) (changes results)
44      - add a cap on AREA after advecting AREA if seaice_growth is not called
45    o change calculation of Visbeck K:
46      - no longer depend on tapering scheme; instead, compute slope (limited
47        by GM_maxSlope). this is equivalent to what was comuted before with
48        clipping or linear tappering.
49      - fix vertical averaging (wrong by 1/2 level)
50      - leave the old version (but will not be maintained) within
51        #ifdef OLD_VISBECK_CALC / #endif
52      - update output of exp. ideal_2D_oce
53    o change error catch in calc_r_star to improve vectorization
54    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
55      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
56    o adjoint:
57      Re-organized adjoint checkpointing according to Matt Mazloff
58      (but with modifs/completions/cleanups)
59      Storing is now bundled into large arrays to optimized I/O
60      (and second step in cleanup of the_main_loop)
61    
62    checkpoint59b
63    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
64      - export/import (between ocean & coupler) fields needed for ocean DIC.
65    o pkg/seaice:
66      - get rid of three more exchanges seaice_calc_viscosities (required
67        different loop boundaries in seaice_lsr and seaice_ocean_stress)
68      - bug fix in seaice_ocean_stress (update of lab_sea required)
69      - reduce loop boundaries to necessary minimum also in seaice_evp
70      - go back to the old way of computing deltaC/Z as the adjoint likes that
71        better
72    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
73      passive tracer to an Age Tracer) + update output.txt
74    o pkg/exf:
75      - implement A-grid / C-grid selection for wind-stress input files.
76      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
77      for now, in exf_bulk_largeyeager04.F only :
78      - change implementation for case where windspeed + 2. components wind-stress
79        are read-in. AND use rhoConstFresh to convert evap.
80    o pkg/seaice:
81      - use correct EXCH_UV for wind-forcing (on A-grid).
82      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
83        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
84    o pkg/exf:
85      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
86      EXF_INTERPOLATION:
87      - merge global_with_exf/code version of exf_interp_read.F
88        to the main code ;
89      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
90        reading the file ; Important: This options needs to be defined to recover
91        previous code.
92        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
93      - no longer loose real*8 precision along the way when using exf_iprec=64.
94    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
95      - change discretisation of evp-solver in order to avoid another exchange
96        (changes lab_sea) and clean up a little
97      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
98        help the adjoint (this also changes the results slightly)
99      - add a few "_d 0" where they had been missing in seaice_evp.F
100      - cleaning up: remove unused seaice_calc_rhs.F
101    o pkg/exf: some cleaning-up:
102      - change various "constants" into runtime parameters
103      - cleaned-up Large&Yeager04 routine which should eventually
104        replace exf_bulkformulae.F (changed names of S/R and CPP)
105        and merged various ALLOW_ATM_WIND options
106     only used with thsice pkg (in thsice_get_exf.F):
107      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
108        which are used when useStabilityFct_overIce=TRUE (= the default)
109      - change default values of ice & snow emissivity and scale downward LW
110        by ice & snow emissivity.
111    o pkg/thsice:
112     fix few little problems, in thsice_calc_thickn.F:
113      - growth vertically (and not laterally) if iceFrac == iceMaskMax
114      - melt only laterally if hIce < hThinIce (as the comments say)
115      and in thsice_extend.F:
116      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
117      - start to form ice as soon as the minimum ice-volume is reachable.
118     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
119      and cpl_aim+ocn
120    o pkg/kpp
121     - move computation of surface related input fields to KPP into a new
122       subroutine kpp_forcing_surf.F
123     - remove wrong (within bi,bj loops) EXCH calls.
124     - little cleaning (add argument myThid in last position, cvs header ...)
125     - for now, fix conservation problem by exchanging KPPviscAz (may not
126       be the best fix)
127    o pkg/seaice
128     - check for inconsistent evp parameter/cpp-flag combination
129     - remove leftover errIO flat for obsolete name list error handling
130    o OpenAD
131     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
132    
133    checkpoint59a
134    o pkg/seaice: some parameter clarifications and a little bit of clean up
135    o pkg/thsice: rename run-time parameters:
136       himin       -> hIceMin
137       himin0      -> hThinIce
138       hihig       -> hThickIce
139       i0          -> i0swFrac
140       transCoef   -> bMeltCoef
141       frac_energy -> fracMelting
142      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
143       with default values (for now) that do not change the results.
144      remove old version of thsice vars advection in pkg/seaice.
145    o in FFIELDS.h:
146      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
147      - make pLoad & sIceLoad always available (but still only used if
148         ATMOSPHERIC_LOADING is #define).
149    o pkg/kpp: replaced _KPP_RL with _RL
150    o bug fixes for vertical diffusivity computations when both KPP and
151        3D diffusivity arrays are used.
152    o pkg/seaice: fix bug in evp solver, while doing that
153      - change (improve?) discretization of stress computations for both
154        cgrid-lsr and evp solver
155      - add a new routine to compute strain rates
156      - the above changes lab_sea results
157      - add no slip conditions for evp solver (off by default), lsr-version
158        may follow
159      - fix exchange for shear at Z-points (does not change lab_sea)
160      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
161        (to force the user to pick a time step since there is not "safe" way
162        of choosing it)
163      - add principal stress diagnostics
164      - rearrange fields for evp a little to avoid having to call a: too many
165        exchanges and b: exchanges for stress trensor components which we do
166        not have.
167      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
168        of evp, complete rewrite for lsr case (latter is does not yet work
169        in all cases)
170    o pkg/kpp: add code to have mixing in shelf ice caverns
171      - add myThid to all kpp routines (long overdue)
172    
173    checkpoint59
174    o pkg/exf:
175      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
176        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
177      - move exf header files from lower_case.h to UPPER_CASE.h ;
178        add missing cvs Header & Name
179      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
180      - add namelist param. selectStressGridPosition, exf_monFreq
181      - retire many _CLIM routines, and remove data.exf_clim
182        + params moved to data.exf
183        + climsst, climsss now handled by exf_set_gen, i.e.
184          climss?period=0 refers to constant field,
185          climss?period=-12 to monthly forcing
186      - split up namelists in data.exf
187    o pkg/seaice:
188      - remove seaice_exch and seaice_exch_uv
189      - remove superfluous exchange of theta
190      - add myThid to seaice_budget_ocean/ice
191      - add new interface for atmospheric wind forcing (C-grid only)
192        + new routine
193        + two new field (taux, tauy for stress over ice)
194        + removed one global field (DAIRN) for C-grid case only
195    o pkg/thsise
196      - 2nd set of modifs for thsice adjoint in conjunction with exf
197    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
198    
199    checkpoint58y_post
200    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
201      vertical diffusivity, similar to that in MOM4; turned on using
202      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
203      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
204    o Added capability for 3D specification of background vertical diffusion
205      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
206      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
207      "data" file that contains the 3D vertical diffusivity coefficients.
208    o ice dynamics (pkg/seaice) with thsice thermodynamics:
209      - add code within pkg thsice to advect & diffuse sea-ice fields
210      similar to (and will replace) what has been added in  seaice_advdiff.F,
211      but: - conserving Mass, Heat & Salt.
212           - better when using non-linear advection scheme (not yet fully tested)
213           - can also be used in atmospheric set-up (for now, only the diffusion).
214    
215    checkpoint58x_post
216    o IO option for global-file compact format:
217      - add options when generating topology (utils/exch2/matlab-topology-generator)
218      - add I/O capability (pkg/mdsio).
219      - adapt utils/matlab/rdmds.m to read this format.
220      for now long-line format not yet supported by pkg/mdsio (& exch2).
221    o shelfice: add a few diagnostics
222    
223    checkpoint58w_post
224    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
225      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
226      (and replace horiVertRatio in NH code).
227      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
228                         and tutorial_plume_on_slope (sensitive to truncation)
229    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
230      directly to drive seaice model (C-grid only)
231    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
232     - reintroduce computation of wind from stress,
233     - compute tau (in exf_bulkformulae.F) from windstress averaged to
234       mass points to avoid tau = 0
235     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
236    o rdmnc.m: make it work with "global" files created with gluemnc
237    o rdmnc.m : some improvements in dealing with singleton dimension
238      (tested on all testreport mnc output files).
239    o genmake2: disable pkg/profiles if netcdf test fails.
240    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
241    o move call to cal_readparms up to make calendar parameters/variable available
242      to all packages
243    
244    checkpoint58v_post
245    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
246      useDynP_inEos_Zc tested.
247    o pkg/exf: changes to properly interpolate/mask/scale initial fields
248    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
249      and portions thereof.  See read_cs.txt for description and examples.
250    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
251      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
252      following the great-circle arc between those 2 points.
253    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
254      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
255    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
256     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
257     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
258     - still needs work (not working with some options ; efficiency to improve)
259       and serious testing.
260     - use this scheme for temperature & salinity in 2 advection test exp.:
261       advect_xy & advect_xz, respectively.
262    
263    checkpoint58u_post
264    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
265    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
266    o testreport: add option "-skipdir" to skip some test.
267    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
268      momentum calculation.
269    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
270    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
271      remove checkpoint.F and the_correction_step.F (no longer used);
272      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
273    o add option (linFSConserveTr) to correct for tracer source/sink due to
274      Linear Free surface
275    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
276    o pkg/thsice: fix reading mnc-pickups
277    
278    checkpoint58t_post
279    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
280    o pkg/mdsio:
281     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
282       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
283       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
284     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
285     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
286       either MDS_READ_FIELD or MDS_WRITE_FIELD )
287     - new S/R (to replace MDSWRITEMETA), which allows to write more
288       informations (variable names, time ...) to meta files.
289     - modify rdmds.m to give back the meta file content.
290    o pkg/diagnostics: change vertical interpolation to be safer, and more
291       flexible (define p-levels to interpolate to in data.diagnostics);
292      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
293       diagnostic pointer.
294    o pkg/seaice: more cleaning up of seaice_growth, added many comments
295    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
296    o fix multi-category seaice:
297     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
298       SEAICE_MULTICATEGORY
299     - fix short wave heat flux
300    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
301       and allow to use EVP solver. Change forward lab_sea: test both EVP
302       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
303    o Initial check-in of lab_sea adjoint
304      (very similar to natl_box_adjoint/code_seaice)
305      * used C-grid and EVP solver
306      * used KPP, GM/Redi
307      * uses inAdExact=.TRUE.
308      * gradient checks fail for both ADM and TLM
309        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
310        f.d. gradients actually seem more problematic than ADM, TLM gradients;
311        issue is related to forward mismatch between g77 an ifort
312    o pkg/seaice: overhaul of thermodynamics
313     - growth.F and groatb.F are replaced by new routine seaice_growth.F
314     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
315     - move a few global fields out of SEAICE.h into seaice_growth.F and
316       make them 2D (FICE/QNETO/ ...)
317     - remove FO (it is the same as QNETO)
318     - introduce a few local fields to avoid modifying external fields such
319       as atemp, etc.
320    
321    checkpoint58s_post
322    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
323      changed exf_set_gen.F so that
324        genperiod=0 means input file is one time-constant field and
325        genperiod=-12 means input file contains 12 monthly means
326    o CG2D: use pre-computed solver main-diagonal (stored in common block);
327      this affects truncation error ; generate new output file for exp. which
328      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
329        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
330        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
331        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
332        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
333        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
334    o start implementation of deep-atmosphere and anelastic formulation
335    o verification: remove 2nd copy of input files and use script "prepare_run"
336      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
337    o mom_common/vecinv/fluxform: fix a few initialisation isssues
338    o profiles: fix for multithreaded case
339    
340    o diagnostics: rename few diags:
341      s/'PRESSURE'/'RCENTER '/g
342      s/'TICE    '/'oceFreez'/g
343      s/'TAUX    '/'oceTAUX '/g
344      s/'TAUY    '/'oceTAUY '/g
345      s/'SWFLUX  '/'oceQsw  '/g
346      s/DIFx/DFxE/g
347      s/DIFy/DFyE/g
348      and add few ocean-forcing diagnostics:
349      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
350    o modifications to pkg/seaice/growth.F and budget.F, which change results of
351      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
352      as actual snow thickness.  It now refers everywhere to effective snow
353      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
354    
355    checkpoint58r_post
356    o modifications to pkg/seaice/growth.F, which change results of
357      lab_sea experiment: fixes pertain to melting snow over open water, to
358      masking EVAP under sea ice, and to using the correct AREA variable for
359      computations of EVAP, PRECIP, HSNOW, and GHEFF
360    o add ability to read bathy, salt, and theta using MNC (off by def)
361    o add flooding algorithm and advection of HSNOW for pkg/seaice;
362      both are turned off by default and do no change any results
363    o seaice advection with pkg/thsice: a step toward the use of non-linear
364      advection scheme, but #ifdef or commented out for now (requires more EXCH).
365    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
366      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
367      in natl_box (affects results @ truncation level: update output.txt)
368    o multi-threading and IO:
369      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
370      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
371        (needed to work with SingleCpuIO): tested in all verif. exp.
372    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
373      affects the results (but none of the verification test uses this scheme).
374    o Adding some pkg/diagnostics capability to pkg/seaice
375      (will certainly be subject to changes)
376    o ctrl: adding new control variables:
377      lwflux, lwdown, evap, snowprecip, apressure, runoff
378    
379    checkpoint58q_post
380    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
381      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
382      high_res_cube configuration by 4% on Columbia.
383    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
384      add (in global_with_exf/code) a version of EXF_INTERP_READ without
385      dynamical allocation (seems to work in multi-threaded).
386    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
387      single CPU io) so that TAF does not have to see EESUPPORT.h
388    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
389    
390    checkpoint58p_post
391    o obcs: stop if obcs is used with useCDscheme = .true.
392    o shelfice:
393     - fix a sign error so that no slip at shelfice interface works
394     - remove stop for combination non-hydrostatic code and shelfice. That does
395       not mean, that the results are correct, but at least they are numerically
396       stable
397    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
398    o added adjoint exch routined for all exch*3d* routines
399      and updated flow directives
400    
401    checkpoint58o_post
402    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
403      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
404    o change controling S/R for writing pickup file (new S/R do_write_pickup)
405      and clean-up reading/writing of pickup files.
406    o fix local version of read/write pickup (NH part) in rotating_tank/code
407    o simplify EXCH interface:
408     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
409     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
410    o added the regrid package
411    o shelfice:
412     - add a simple boundary layer scheme to reduce noise
413     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
414    
415    checkpoint58n_post
416    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
417       local variable (not in common block).
418    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
419      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
420      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
421        to work with SingleCpuIO.
422    o add "_d 0" to real constant of pkg/cfc subroutines ;
423       update exp. cfc_exemple & tutorial_cfc_offline output files.
424    o multi-threading and IO:
425      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
426        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
427      - barrier before and after reading.
428      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
429      - avoid using MDS_WRITELOCAL for LAND pkg output.
430      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
431        common-block variables ; Allows multi-threading with master-thread IO.
432    o change default MAX_NO_THREADS from 32 to 4 ;
433      and stop cleanly when MAX_NO_THREADS is too small.
434    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
435    
436    checkpoint58m_post
437    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
438       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
439    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
440       keep global_ocean.90x40x15 (for AD testing) with former secondary test
441       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
442    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
443        add MITgcm_tutorials (= code + all the tutorials)
444    o ecco, option to compute cost for total ssh (mean+anom)
445    o consistent with addition of ptracer and ssh in pkg/profiles
446    o profiles: adding ptracer and ssh
447    o testreport: change multi-test output-file name
448      (from output.txt.{name} to output.{name}.txt)
449    o profiles: now ok for mutli-tiles case
450    o seaice: add 4 parameters for different advection schemes for area,
451      (effective) seaice thickness, enthalphy, and snow height. Their default
452      is the standard parameter SEAICEadvScheme
453    o calc_gw:
454     - add cosFacU in zonal viscous flux (harmonic.visc.).
455     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
456       of tutorial_plume_on_slope.
457    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
458    o calc_gw: true flux-form, account for horizontal grid spacing.
459      update rotating_tank results, but not plume_on_slope (affected at
460      truncation level, 11 digits).
461    
462    checkpoint58l_post
463    o calc_gw:
464     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
465     - remove side-drag for now (need to fix it); update plume_on_slope results.
466     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
467    o commit code to make SST/SSS weights spatially variable
468      (based on either variable in-situ or variable initial T/S weights)
469    o pkg/ecco:
470      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
471        now based on horizontally varying weights wthetaLev, wsaltLev
472      * cost_averagesflags now returns year indices in addition to day, month
473      * sflux balance is performed on annual basis
474        (sflxumm, sfluxmm2, bal_sfluxmm)
475      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
476        including separate counting and multipliers
477    o pkg/rbcs
478      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
479    
480    checkpoint58k_post
481    o testreport:
482     - always build in dir. "build" (if not there, mkdir build instead of building
483       & running in input)
484     - run in dir run (if it exists), in build otherwise.
485     - call prepare_run (if input/prepare_run exists)
486     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
487    o pkg/exf modifications to interpolation and rotation routines for more
488       reasonable treatment of North Pole singularity: for tracers North Pole
489       value is set to northernmost zonal-mean value, for zonal velocity it is
490       set to zero, and for meridional velocity it is set to northernmost value.
491    o pkg/exf/exf_check_range.F
492     - add tile index to diagnostics and move stop statement to the very
493       end of the routine.
494    o pkg/diagnostics: (diagnostics_main_init.F)
495      define title of isomorphic variables according to the current config.
496    o pkg/thsice with pkg/seaice dynamics:
497    - fix domain of computation (interior only, required for exf) and do exchanges
498    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
499    o towards a standard way of dealing with multi-threading in MONITOR
500      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
501    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
502       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
503    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
504    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
505    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
506       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
507    o tracer advection:
508     - clean-up and simplify calc_common_factors.F
509     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
510       advection subroutine (but still not used within DST advection S/R)
511    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
512    
513    checkpoint58j_post
514    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
515      from file (collects calls previously in FORWARD_STEP)
516    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
517    o adjoint store dir. adjusted accordingly
518    o genmake2
519      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
520    
521    checkpoint58i_post
522    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
523      on wind stress (SEAICEstressFactor defaults to 1.)
524    o Total number of Timers is finite (<=40): comment out 2 non-essential one
525      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
526    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
527      on CS-grid: no longer loosing mass.
528    o exf & curvilinear-grid: no longer modify longitude xC & xG.
529    o pkg/ggl90: fix sloppy output and fix a bug
530    o pkg/seaice: added SEAICEuseEVPpickup parameter
531      - Set to false in order to start EVP solver with
532        non-EVP pickup files when using SEAICEuseEVP
533      - fix sign error in diffusion in seaice_calc_rhs
534    
535    checkpoint58h_post
536    * Modifications for bottom topography control
537      o replace hFacC by _hFacC at various places
538      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
539      o add non-self-adjoint cg2d_nsa
540      o update autodiff support routines
541      o re-initialise hfac after ctrl_depth_ini
542      o works for 5x5 box, doesnt work for global_ocean.90x40x15
543    * Adding verification for 5x5 box (4-layer) bottom topography control
544    
545    checkpoint58g_post
546    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
547       used for mean seasonal cycle, mean diurnal cycle); add an example
548       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
549    o pkg/ggl90:
550      - add parameter (minimum surface kinetic energy)
551      - fix bug (avoiding division by zero)
552    o couple pkg/thsice to pkg/seaice:
553      - modify advection in seaice to accomodate new scalar fields to be advected
554      - only muliDimAdection scheme work with seaice/thsice
555      - mapping of thsice-variables to seaice-variables, back and forth
556      - does not break the verification experiments, but does not give the
557        desired results either
558    o pkg/seaice
559      - make (default) second order advection a bit less confusing?
560    
561    checkpoint58f_post
562    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
563      to pkg/seaice):
564      - new routines thsice_map_exf and thsice_get_exf provide the interface
565      - add an additional formal parameter to thsice_solve4temp
566    o pkg/exf:
567      - add new fields wspeed, snowprecip (to be able to couple to thsice)
568      - correct Stefan-Boltzmann constant
569      - new parameter for longwave surface emittance
570      - separate some stuff from exf_bulkformulae into new routines  
571        exf_radiation, exf_wind
572      - add new parameters and constants: longwave emissivity for ocean, ice
573        and snow, evaporation parameters over ice
574      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
575        either wind from stress or stress from wind
576    o pkg/thSIce:
577    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
578    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
579       and THSICE_CALC_THICKN
580    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
581    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
582      to make debugging easier.
583    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
584    o pkg/bulk_force:
585      - clean-up comments and parameters ;
586      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
587    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
588      generate new output for test-experiment: aim.5l_cs.thSI
589    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
590      testreport accordingly
591    
592    checkpoint58e_post
593    o SEAICE_CGRID adjoint done
594    o R_STAR adjoint implemented.
595      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
596      * need to sort out init. of h0facc, etc.
597    o Make pkg/profile fully independent of ecco,cost, etc. stuff
598      to be able to use it in pure forward.
599    
600    checkpoint58d_post
601    o upgrade simple test-experiment to tutorial example:
602     step.1: duplicate the experiment and (step.2) will remove the old copy.
603      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
604      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
605      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
606      tutorial_global_oce_biogeo    <- copy of dic_example
607      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
608      tutorial_plume_on_slope       <- copy of plume_on_slope
609      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
610      tutorial_global_oce_optim     <- empty for now (David ?)
611      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
612     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
613    o correct a sign problem in cost_scat.F
614    o obcs and ptracers: fix boundary conditions for advections schemes
615      with larger stencil
616    o thsice adjoint: start
617    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
618      completeness
619    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
620      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
621    o ptracers adjoint:
622      * avoid extensive recomputatations
623      * fix missing re-init. of gptr (missed by TAF)
624    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
625      me to turn off the excessive output to STDOUT that this package produces
626    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
627      and add those terms in Vector-Invariant formulation.
628    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
629      if the control period (xx_hfluxperiod etc) is 0
630    o in profiles pkg, clean routines and fix details
631    o in ecco pkg, reading ssh data:
632      fix problem in case the model does not start at iter0=0
633    o fix mnc-pickup/restart for ptracers
634    o new package prifiles:
635      code to compute profile-based cost by Gael Forget
636      (modifs in ecco, ctrl, autodiff)
637    o Benign bug fix in initialization (spotted by M. Mazloff) of
638      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
639    
640    checkpoint58c_post
641    o adjoint: finish NLFS adjoint and provide reference output in
642      verification/global_ocean.90x40x15/results_ad_nlfs
643    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
644      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
645      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
646      with SEAICE_CGRID defined.
647    o move calendarDumps from "data" to "data.cal" and clean-up the code
648      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
649    o add useEXF & useCAL flags (for now, set in hard-coded way)
650    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
651      (were missing in NH mode, and wrong in quasihydrostatic mode).
652      waiting for Chris updated version of calc_gw to add those CALLs.
653    o fix bug in quasihydrostatic S/R ;
654      add a test for this option: global_ocean.90x40x15.qshyd
655    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
656      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
657    o add on/off flag useOffLine for package OFFLINE
658    o seaice:
659      - modify advection so that it works also on the C-grid
660      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
661        problem in multi-tile runs with C-grid
662      - add flags for clipping ice velocities and/or masking solver forcing
663      - fix drag (ocean on ice) formulation and a bug that caused noise in the
664        C-grid solver
665      - added a few comments to seaice_diffusion.F
666      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
667        are now exclusive)
668      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
669        required re-ordering the code a little:
670       + make DAIRN global variable (defined in SEAICE)
671       + move computation of the viscosities eta and zeta into a new separate
672         routine (because I need to recompute them in seaice_ocean_stress.F)
673    
674    checkpoint58b_post
675    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
676      update output.txt of exp. aim.5l_cs.thSI
677    o various mnc cleanups and improvements:
678      + shrink lookup tables by factor of ~4
679      + better error reporting when running out of lookup space
680      + able to handle longer path/file names (up to 500 chars)
681    o adjoint:
682      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
683      - TBD: "hidden" mom_vecinv recomp. in dynamics
684    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
685     (allow to differentiate between forcing components using new integer flags:
686      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
687     and add new flag to put Dissipation tendency out of Adams-Bashforth.
688    o ecco
689      - enable trend removal from SSH anomaly obs.
690    o adjoint
691      - a fix for PmEpR when #undef EXACT_CONSERV
692      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
693      - try to fix "hidden" recomp. in forward_step for NLFS
694        (NLFS seems broken sometimes after I checked it in)
695    o seaice:
696     - add c-grid version of the dynamic solver:
697       + three new routines that are the c-grid substitute lsr, dynsolver
698         and ostres
699       + put a few fields that were local to dynsolver into global common
700         blocks, so that I can move the computation of stresses etc into
701         seaice_lsr (saves coding but may break the adjoint).
702     - replace more hardwired parameters by runtime parameters
703     - add ice masks that mask the rhs of the implicit solvers where there
704       is no ice (commented out in seaice_dynsolver, because i am not sure
705       if this works properly), eventually this should replace the clipping
706       of ice velocities in seaice_dynsolver to +/-40cm/s.
707    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
708      include it only where its needed
709    o move balancing of fluxes before the call of external_forcing_surf
710    o seaice:
711      - correct units of turning angles (now they are really in degrees)
712      - move computation of GWATX/Y out of main routine into dynsolver
713      - initialize GWATX/Y in seaice_init
714    o Apply mask on Fresh-Water flux (needed for SSH forcing).
715      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
716    o seaice: add runtime flags for turning angles (default to zero)
717    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
718      and trend from exf forcing and ctrl control adjustments
719    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
720      (since checkpoint57x_post)
721    o change the default rotation period to 86164.s = the Earth rotation
722    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
723      and based on a reference stratification. Tested within hs94.cs-32x32x5.
724    o seaice advection: add code for choosing between the default (2nd order
725      central differences) and multiDim advection schemes provided by
726      pkg/generic_advdiff
727    o seaice:
728      - removed all references to SEAICE_GRID.h fields from
729        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
730        (cubed-sphere configuration will change a little)
731      - grid computations in seaice_init are obsolete now.
732      - cleaned up code a little so that is easier to read (hopefully).
733      - added new (better?) discretizations of default advection and diffusion
734        (turn on with SEAICEuseFluxForm)
735      - replace 1 in 3d global fields by kSurface in growth.F
736      
737    checkpoint58a_post
738    o seaice:
739      - bug fix in advect.F
740    o shelfice:
741      - separate shelfice load anomaly from pload (breaks with time
742        dependent forcing), => introduce constant field shelficeLoadAnomaly.
743        Its default is 0., but it may be computed more cleverly from (unknown)
744        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
745        done offline. A good approximation of the pressure load anomaly is
746        necessary to avoid large initial adjustment processes underneath
747        deep-reaching shelfice.
748      - small fix in ISOMIP shelfice_thermodynamics
749      - add more sophisticated thermodynamics of Hellmer (1989), this is
750        now the default
751      - give a few constants more intuitive names
752    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
753      if bulk formulae are used in long integration (especially EmPmR). Turn
754      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
755      if balancePrintMean, the imbalance that is substracted is printed to
756      STDOUT.
757    o fix bug (typo) in obcs_apply_eta.F
758    o add a new package shelfice which enables us to model the circulation
759      underneath shelf-ice with draughts of hundreds of meters.
760     - works
761     - to do: + include improved thermodynamics
762              + check whether kSurfC (from model/inc/SURFACE.h) can be used
763                instead of new field kTopC
764              + can we use topoFile, Ro_surf and existing code in ini_depth.F
765                instead of new field R_shelfIce and new code in ini_depth.F
766                and ini_mask_etc.F?
767              + adjust vertical mixing schemes?
768    o seaice pkg:
769     - add a cpp-flag to include a simple formula for a salinity dependent
770       freezing point of sea water at the surface
771     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
772       meridional stresses are now different (and hopefully correct)
773    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
774       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
775       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
776    o pkg/diagnostics: add options and parameters for regional-statistics
777       diagnostics ; define regions by reading a region-mask from a file
778       (might add other options later)
779    o pkg/bulk_force:
780     - add option and parameters to use AIM surface-flux formulae.
781     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
782       others forcing fields (defined in PARM05, parameter file "data") are loaded
783       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
784     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
785     - use the right EXCH call for uwind,vwind (to work on CS-grid).
786     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
787       and parameters (note: calcWindStress replaces .NOT.readwindstress).
788     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
789    
790    checkpoint58
791    o add "--embed-source" option to genmake2 which, when the supporting
792      tools can be compiled (as determined by genmake2) will turn on the
793      embed_files package which then embeds the entire MITgcm source code
794      (*.[fFhc] + Makefile) used for the build within the executable
795      - requested by CNH but off by default
796      - adds a paltry <9MB to the mitgcmuv executable in most cases
797      - only writes the output when useEMBEDSRC in eedata is true
798    o clean up 3-dim. relaxation codes:
799      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
800      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
801      * Thanks to Tom Haine for testing!
802    
803    checkpoint57z_post
804    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
805      affects output (@ truncation level) of exp. plume_on_slope ; updated.
806    o fix the pickup behavior for obcs in combination with ptracers
807    o fix a bug in ptracers_external_fields_load
808    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
809      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
810    o transfered surface NH pressure to eta field (if exactConserv).
811    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
812         and update lab_sea output.txt file.
813    o completing 3-dim. relaxation code: additional term
814         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
815      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
816      * At compile time, in "EXF_OPTIONS.h" set
817          #define  ALLOW_CLIMTEMP_RELAXATION
818          #define  ALLOW_CLIMSALT_RELAXATION
819      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
820          tauThetaClimRelax3Dim = 15552000.0,
821          tauSaltClimRelax3Dim  = 15552000.0,
822      * 3 cases:
823          1) Use a constant-in-time 3-dim. field
824          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
825          3) Real-time relax. to time-evolving prescribed field
826    o Adding Laplacian-type smoothness constraint on
827      initial and boundary (forcing) controls (ic, bc)
828      * enable at compile-time via
829        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
830      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
831      * Absolute scale somewhat unclear so far
832      * no area weighting was included since no other cost term does so far
833    
834    checkpoint57y_post
835    First step for a NLFS adjoint
836    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
837    o new init. routines for calc_r_star, calc_surf_dr
838    o still need to deal with ini_masks_etc
839    o testreport seemed happy
840    checkpoint57y_pre
841    
842    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
843    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
844    o add new offset feature to offline pkg (plus minor cleanup)
845    o cfc fixes for final year of integration
846    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
847      be in GCHEM_OPTIONS).
848    
849    checkpoint57x_post
850    o fix testreport Pb in multiple test experiment.
851    o cleanup our namelist syntax in verification:
852      - make it more F95 standards compliant (some work still needed)
853      - allows the vast majority of our tests to work with gfortran
854    o Non-Hydrostatic:
855     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
856     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
857    o Allow to apply AB on T,S rather than on AB(gT,gS):
858     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
859     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
860       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
861     - need a "clever" read_pickup to restart from the other AB formulation
862    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
863    o remove some unused variables (reduces number of compiler warnings)
864    o adjoint
865      * Disable useVariableViscosity for adjoint for time being
866        (there are a number of extensive recomputations)
867      * Initialize certain variables needed for adjoint
868    
869    checkpoint57w_post
870    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
871                 fix the singleCpuIO RS version of MDSWRITEFIELD
872       and add a WARNING if using globalFiles=T with multi-processors.
873    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
874      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
875    o tracer advection scheme:
876      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
877       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
878       was not very convenient).
879      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
880       (further tests needed for the implicit DST & Flux-Limiter schemes).
881    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
882      and sRef for convenience, handy, when you want to initialize
883      ptracers in a large domain with a constant non-zero value. Also,
884      untangle ptracers_init.F a little.
885    
886    checkpoint57v_post
887    o change dome exp. to use variable viscosity in side-drag terms.
888    o remove all the files from the cfc_offline test since they are now
889      incorporated into tutorial_cfc_offline which has been producing
890      identical results for a few days of testing
891    o add new parameter: sideDragFactor to enable half-slip-side BC
892      and change side-drag S/R to use viscosity from mom_calc_visc
893      (can switch back by setting sideDragFactor=0.); affects results at
894      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
895       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
896    o vorticity & strain are now computed without masking, to account for
897      no-slip-side BC in variable viscosity calculation ; mask is applied
898      anyway later on, before computing advection/coriolis terms.
899    o modify exp4 to test new obcs support for reading from external files
900      and for passive tracers
901    o fix behavior of ptracers_monitor when monitor output is written to a
902      netcdf-file; still not independent of monitor.F (writes in the same
903      file).
904    o change default value of tRef (put a uniform, meaningful value for ocean
905      & atmos) and initialize sRef (was missing, as Martin mentioned).
906    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
907      to be proportional to enstrophy dissipation length.  Thus,
908       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
909      This is now consistent with Smagorinsky and with the manual.
910    
911    checkpoint57u_post
912    o OBCS and PTRACERS: add open boundary support for passive tracers
913      - either use homogenous (pseudo) v.Neumann conditions or prescribe
914        OB-values from file; this is not different from the way theta and salinity
915        are treated
916      - however, Orlanski-radiation conditions are not supported, and the model
917        will stop if you use pTracers and Orlanski at the same time.
918      - beefed up the rountine obcs_external_fields_load: now only those open
919        boundary values are overwritten with values from files for which there
920        are really files, otherwise the OB-fields remain untouched. This makes
921        it possible to use different OBs at different ends of the domain (as
922        with EXF)
923    o reduce number of exch calls in shap_filt (s2).
924    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
925      truncation level) 4/5 MLAdjust test results (11&12 digits match).
926    
927    checkpoint57t_post
928    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
929    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
930      same truncation, independent of the face number: affects affects several
931      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
932    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
933      note that biharmonic viscosity + no-slip was not tested in any experiment.
934    o fix bug in non-linear free-surf side-drag ; generate new output for
935      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
936    o make mnc honor the writeBinaryPrec flag for most kinds of output
937    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
938    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
939      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
940    o add brackets in multi-terms sum to get same truncation, independent of
941      the face number (manage to get exactly same value of gU,gV at the cs-edge)
942      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
943    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
944      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
945      a maximum grid-scale Reynolds number.  Also, changes all length calculations
946      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
947      Suggested values of viscosity parameters found in mom_calc_visc.
948      Many new viscosity diagnostics available.
949    
950    checkpoint57s_post
951    o Add clearing-house for viscosity calculations, mom_calc_visc and
952      correct numerous bugs in LeithD and Smagorinsky discretizations.  
953      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
954      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
955      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
956      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
957      The Strain-Tension form is now called with useStrainTensonVisc=.true.
958      ViscAhStrain and viscAhTension are now retired.
959    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
960    o In response to JMC's bug report, genmake2 now ignores any soft-links
961      that it finds in the *current* directory when searching for files.
962      Soft-links found in any other source directories will still work as
963      they did before.
964    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
965      a C routine to unlimit the stack size
966    o mnc-ify pkg/aim snapshot vars
967    o mnc-ify pkg/land as requested by Daniel
968    o various changes to mnc including:
969      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
970      - output can now be grouped so that all files within a group
971          change the ITER portion of their names in lock-step together
972      - can now read ("global") PER-FACE (in addition to PER-TILE) files
973          and works with both EXCH1 and EXCH2 (but needs more testing)
974      - writing works for all verification test cases w/ g77 on Linux
975    
976    checkpoint57r_post
977    o make MNC variable initialization happen earlier
978    o add diagnostics for (almost) each term of the momentum Eq.
979    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
980    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
981    o remove MINIMAL_TAVE_OUTPUT option ;
982      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
983    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
984      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
985    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
986    o add time-dependent SST, SSS control
987    o cost terms in ecco/ modularized (new cost_generic.F)
988    o cost_averages routines are modularized (new cost_averagesgeneric.F)
989    o new infrastructure for seaice model vs. obs misfits in seaice/
990      * driver from the_main_loop.F is seaice_cost_driver.F
991      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
992      * gradient check in Exp. 6a of natl_box_adjoint/
993    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
994      (see README file)
995    
996    checkpoint57q_post
997    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
998    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
999      - bug was reported by Jean-Michel and Ian Fenty
1000    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1001      update exp. cpl_aim+ocn output.
1002    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1003      Needed for high-res. runs with large global files
1004      to be able to limit tapelev size
1005    o Changed some tests for adjoint:
1006      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1007      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1008      * global_ocean.90x40x15/ back to default 3-level checkpointing
1009    o Modifications to enable scripted COMMON to MODULE conversion
1010      * verification/OpenAD/code/ has necessary scripts and description;
1011      * converts, compiles and runs successfully;
1012    
1013    checkpoint57p_post
1014    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1015    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1016      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1017    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1018    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1019      (was already the case for dissipation with mom_vecinv,
1020       and also the case for grad.PhiHyd when staggered-timeStep)
1021      This will allow to put dissipation out-off the AB time-stepping.
1022     Unfortunately, affects truncation error. Update output of exp. that "fails"
1023      (cg2d matching number) and leave the others for later: front_relax(10),
1024      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1025      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1026    
1027    checkpoint57o_post
1028    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1029      (2) its ready to be documented during the 20050801 DocFest
1030    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1031      for ideal_2D_oce and lab_sea on linux_ia32_g77
1032    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1033      in global1x1_tot/code_seaice_adj to access indices 32, 33
1034      (worth another tag)
1035    
1036    checkpoint57n_post
1037    o adding precip control xx_precip 32
1038    o adding swflux control xx_swflux 33
1039    o Replacing 10 forcing penalty cost routines by 1 generic.
1040    o Implementing partitioning in time-mean and variable adjustment
1041      for atmos. state.
1042    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1043    o in natl_box_adjoint:
1044      * updated exp 1 to 10
1045        (but does not have time-mean vs. variable split results yet)
1046    o updated global1x1/*_seaice_adj/
1047      to incorporate latest changes
1048    o enable useSingleCpuIO for mdsio vector routines
1049      (applies in particular to tapelev I/O)
1050    o removed inefficient K-loop in all active_file*control*.F
1051    
1052    checkpoint57m_post
1053    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1054      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1055    o pkg/exch2: filling of face-corner halo regions is optional
1056      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1057    
1058    checkpoint57l_post
1059     tag before updating tutorials (pre-release-2)
1060    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1061       for output and interpolation of input fields onto model grid)
1062    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1063       Affects results of exp. rotating_tank ; update output.txt.
1064    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1065          and taking the square quantity and/or using a fraction-weight field.
1066    o fix aim_diagnostics_init.F mate numbers.
1067    o add mnc output capability to diagnostics/diagstat and update
1068      our cvsignore files for the ACSII output generated
1069    
1070    checkpoint57k_post
1071    o lab_sea now uses diagnostics package and provides a suite of
1072      new EXF diagnostics output.
1073    
1074    checkpoint57j_post
1075    o exf
1076      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1077        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1078        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1079      * extended diagnostics output
1080        - now includes all EXF variables
1081        - hs, hl moved to common block
1082        - separate S/R for diagnostics, called after ctrl vector is added
1083        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1084        - EXFqnet contains true Qnet (i.e. includes qsw)
1085      * updated verif. lab_sea, global_with_exf
1086      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1087        to ensure that diagnostics sees a true EXFqnet
1088    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1089    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1090      several times with different frequencies.
1091    o mnc-ify the thsice package as requested by Daniel Enderton
1092      - the monitor--MNC output needs work
1093      - many attributes need to be added (most are currently blank)
1094    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1095      - many attributes need to be added (most are currently blank)
1096    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1097    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1098    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1099      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1100         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1101    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1102     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1103    
1104    checkpoint57i_post
1105    o Diagnostics package was changed: diagnostic allocation is now deactivated
1106      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1107    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1108      add 1rst Order upwind vertical Shear.
1109    o add a quick fix for A/B checkpointing in OFFLINE mode
1110    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1111      end-run around the C/Fortran linking horror in eesup/src/timers.F
1112    o added pkg/runclock: allows user to terminate run based on wall clock
1113    o added non-hydrostatic scaling parameter: nh_am2
1114    o pkg/my82: futile attempt to make results compiler-independent by adding
1115      some "_d 0", etc. no effect.
1116    o for mnc output, fill the 'T' coordinate var with myTime and create a
1117      separate 'iter' variable for iteration count
1118    o pkg/diagnostics:
1119      add new capability: output of Global/Regional & per-level statistics ;
1120      tested against monitor output (including land & thSIce) on various exp.
1121    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1122    
1123    checkpoint57h_done
1124      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1125      data.diagnostics, data.gchem, data.ptracers) is done.
1126    
1127    o pkg/diagnostics: prepare for Global/Regional statistics.
1128      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1129    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1130      and rename it: DIFFERENT_MULTIPLE
1131    
1132    checkpoint57h_post
1133    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1134    o pkg/diagnostics: change output frequency, now in seconds (instead
1135      of Nb of iterations). This requires to change data.diagnostics.
1136    checkpoint57h_pre
1137    
1138    o in mnc, let the user create the output dir if both mnc_outdir_date
1139      and mnc_outdir_num are false
1140    o add fflags() to pkg/diagnostics which allows one to specify, on a
1141      per-file basis, the file precision [default behavior is unchanged]
1142    o added diagnostics to pkg/kpp, including computation of mixed layer
1143      depth based on a temperature/density criterion
1144    o updated verification/natl_box to test the new pkg/kpp diagnostics
1145    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1146    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1147    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1148      not mnc -- this mistake was found by JMC and is now corrected
1149    
1150    checkpoint57g_post
1151    o add Adams-Bashforth 3rd Order time stepping:
1152      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1153      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1154    checkpoint57g_pre
1155    
1156    o make lambda[Theta,Salt]ClimRelax spatially varying
1157      (default remains spatially uniform constant based on tau)
1158    o added new control variables
1159      * init. uVel, vVel, etanN
1160      * lambda[Theta,Salt]ClimRelax
1161    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1162      (suggested by G. Forget)
1163    
1164    checkpoint57f_post
1165    o add parameter "baseTime" = model base time = time at iteration zero
1166      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1167      account for baseTime shift
1168    o move Coriolis arrays from PARAMS.h to GRID.h
1169    checkpoint57f_pre
1170    
1171    o mnc-ifying the seaice package
1172    o introduced an alternative length scale calculation for use in the limiting
1173      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1174    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1175    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1176      as well as grad(vort3).  Made it compatible with both approximate form
1177      for the cubed sphere and full form of these gradients.  Added flag
1178      useFullLeith to select between approximate and full form.  
1179    o add "d0" in getcon.F to reduce differences between compilers/platforms
1180      update output.txt of exp. fizhi-gridalt-hs
1181    o change port_rand funtion to allow to set the seed.
1182    o fix obscure MNC bug involving conversion between reals and integers
1183      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1184        new version is now more standards-compliant
1185    o adjoint-related modifications
1186      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1187      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1188      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1189    
1190    checkpoint57e_post
1191    o Adding eddy stress controls a la Ferreira et al.
1192    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1193    
1194    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1195      update output.txt of exp. fizhi-gridalt-hs
1196    o add more "Z" dimensions and associated coordinate vars to MNC
1197    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1198    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1199      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1200      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1201      months and years.  Requires pkg/cal.
1202    o diagnostics: add pickup functionality
1203      - off by default for backwards compatibility
1204      - current version only uses MDSIO -- MNC will be added
1205    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1206    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1207    
1208    checkpoint57d_post
1209    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1210    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1211      output from the diagnostics package
1212    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1213    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1214      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1215    o add coordinate variables to the MNC output from the diagnostics package
1216    o change MNC-flags default value: true when useMNC=TRUE
1217    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1218      the ability (off by default) to read the grid information using MNC
1219    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1220    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1221    o do snap-shot diagnostics at the middle of the time-interval (instead of
1222      at the end).
1223    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1224      new test for AIM with thSIce + slab-ocean
1225    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1226    o move state variable diagnostics to the beginning of the time step ;
1227      (note: still needs some work specially for snap-shot diagnostics)
1228      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1229    
1230    checkpoint57c_post
1231    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1232    o generate new output.txt files on faulks with g77 & the new -ieee option
1233    checkpoint57c_pre
1234    
1235    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1236      update output.txt of exp. global_ocean.90x40x15
1237    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1238      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1239    o add saltFlux(+File) forcing capability with periodicExternalForcing
1240    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1241    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1242    o improvements for the MNC output from DIAGNOSTICS:
1243      - correct handling of the unlimitied dimension
1244      - all dims now have associated coordinate variables
1245      - variables located at U, V, and Corner ("Z") points are now written
1246        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1247        *all* data points are output
1248    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1249    o added pkg/seaice/seaice_monitor.F
1250    o mdsio_readfield.F can now read files visible only to master MPI process.
1251    o pkg/seaice: some test code for ice-modified ocean stress
1252    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1253      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1254      spurious negative numbers for precipitation and humidity.  Will cause
1255      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1256    o pkg/ctrl/
1257      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1258        May be enabled via doPackDiag
1259      *  introduce z-scaling of
1260         + gradient (doZscalePack) and
1261         + control (doZscaleUnpack)
1262    o pkg/mdsio/
1263      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1264      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1265    
1266    checkpoint57b_post
1267    o simplify options in diagnostics_fill arguments (remove weird combinations)
1268    o fix MNC coordinate variables so that they now contain per-face index
1269      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1270      general, EXCH2 grids are only aligned to a "local" coordinate system
1271    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1272    o Implement instantaneous output within pkg diagnostics:
1273      setting a negative frequency in data.diagnostics produces
1274     "snap-shot" output (as opposed to time-average if freq > 0)
1275    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1276      NOTE: change ptracer diagnostics name: use 2 characters to work with
1277            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1278    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1279      becomes the coordinate variable for the 'T' dimension
1280    o add CF-style coordinate variables to MNC
1281      - just a first cut:  numbers are meaningless on the cubesphere and
1282        missing along the T axis but otherwise it works!
1283    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1284    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1285    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1286      this is based directly on what the model compute, so that the content of
1287      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1288    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1289    o clean up build options files for SunOS, in particular
1290      - remove -traditional from xmakedepend
1291      - change -xarch=v9 to -xarch=native for f77
1292      - restore use of make (not gmake)
1293      - add CC=gcc if using g77
1294    o changes per discussion of AM, JMC, & EH3 today:
1295      - move redundant "grid" variables out of "state" -- in preparation of
1296        creating proper CF-style coordinate variables and in recognition
1297        that any/all grid variables can be easily copied (eg. w/NCO) from
1298        the grid files into any of the other NetCDF files
1299      - *always* output grid variables with MDSIO (this will eventually be
1300        changed)
1301      - output MNC grid file if useMNC is true
1302    o every instance of _END_MASTER() has been found and replaced with
1303      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1304      preprocessors
1305    o re-arrange diagnostics pkg initialisation:
1306     - allow each package to extend the available diagnostics list
1307     - add some checking and fix small problems (multi-threaded, ...)
1308     - new S/R diagnostics_fill (replace fill_diagnostics):
1309       look through the short list of active diag. (instead of the long list)
1310       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1311    
1312    checkpoint57a_post
1313    o this set of changes restores TAMC compatibility
1314      tested for global_ocean.90x40x15 adjoint on trough
1315      (what a pain)
1316    
1317    checkpoint57a_pre
1318    o some modifs in tools/build_options for sunos
1319    o call ctrl_pack for ctrl at end for optimcycle=0
1320    
1321    checkpoint57
1322    o add horizontal bi-harmonic viscosity for vertical velocity
1323      - new parameter viscA4W (defaults to viscA4)
1324      - affects only non-hydrostatic code
1325      - to be done: no-slip lateral boundary conditions
1326    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1327    o implement Implicit Vertical advection for pTracers
1328    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1329      (implemented also for implicit vertical diffusion & advection)
1330    o OBCS: extend application of tracer open boundary conditions
1331      to a strip beyond the boundary of width Olx/Oly
1332    o add call monitor to TAF set of required calls (flow directives)
1333      and include in natl_box_adjoint
1334    o untangle a few ifdefs related to cost, ctrl, autodiff
1335      untangel a few ALLOW_ECCO_OPTIMIZATION
1336    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1337      (theta2, salt2 in ecco_cost_weights)
1338    
1339    checkpoint56c_post
1340    o OBCS as control variables
1341      - update ctrl_ad_diff.list, obcs_ad_diff.list
1342      - remove balance of obcs controls from default
1343      - fix index bug nobcs in ctrl_init
1344      - fix dummy fields filen in ctrl_pack
1345      - add dummy weights for obcs
1346    o lsopt: comment out fort.94 output
1347    o optim:
1348      - remove unnecessary header files
1349      - adjusted namelists
1350      - add xerbla.F to Makefile
1351    o exf:
1352      - multiple modifications of exf_check_range
1353      - unit change in exf_init_runoff from [m/year] to [m/s]
1354    o mdsio:
1355      - i/o-vector change debugLevel from debLevA to debLevB
1356    
1357    checkpoint56b_post
1358    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1359      is called from DO_THE_MODEL_IO
1360      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1361      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1362      - clean up PTRACERS_WRITE_TIMEAVE a little
1363    o add another verification experiment that tests both the cfc-pkg and
1364      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1365      reactive tendencies treated inline with regular timestepping
1366    o testreport previously did a lousy job of comparing small numbers, so
1367      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1368      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1369      testreport.
1370    o ptracers_monitor: bug fix for MPI
1371    
1372    checkpoint56a_post
1373    o GCHEM: finish reorganizating the package
1374      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1375        (introduces another 3D-array for each passive tracer, but only if
1376        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1377        gchemTendency is not needed because the timestep is done separately)
1378      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1379      - GCHEM is now---more or less cleanly---separate from PTRACERS
1380      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1381        so clear to me how that should be done in a general way.
1382    o CFC: improve formatting of output in CFC_ATMOS
1383    o PTRACERS:
1384      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1385        that ALL experiments with ptracers enable can be checked. This makes
1386        GCHEM_MONITOR obsolete.
1387      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1388        monitorFreq
1389      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1390    o add PTRACERS (PTR0[1-5]) to testreport output
1391    o exf_check_range:
1392      * default changed to .TRUE.
1393      * will check values for niter0 if debLevA, every timestep if debLevB
1394      * STOP in exf_check_range if 'out of range'
1395      * range chosen generous to allow for potential extema
1396      TBD: a version with stricter range
1397           permitted range would be runtime parameters
1398    o GMredi:
1399      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1400      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1401      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1402    o GCHEM:
1403      - move call to GCHEM_FORCING_SEP, so that it is now called before
1404        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1405      - introduced a useGCHEM runtime flag and applied it everywhere.
1406      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1407        this flag is now only visible within GCHEM-pkg routines.
1408      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1409        be replaced by a 3D array that is computed before thermodynamics; for
1410        this, the tracer ID iTracer had to be included into the parameter list
1411        of ptracers_forcing
1412      - set up forward_step to call gchem_forcing, that will replace
1413        gchem_forcing_int in ptracers_forcing
1414      - cleaning up
1415    o small cleaning of exch2: remove files that are also in eesupp/src
1416    
1417    checkpoint56
1418    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1419    o mnc: cleanup "full" files--fixes out-of-memory problem
1420    o ECCO-GODAE
1421      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1422      * fully merged and updated from SIO code
1423        windstress sign change affects
1424        - exf_inscal_[u/v]stress
1425        - sign of xx_tau[u/v] adjustments
1426        - signs in cost_scat
1427      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1428      * natl_box_adjoint updated and compressed
1429      * 2-level checkpoint switch added
1430        (tested in EXP. 1 of natl_box_adjoint)
1431      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1432    o SVD
1433      * first complete, non-hacked version for SVD calculations
1434      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1435        performed via direct access files admtlm_vector.it????
1436        (via ctrl_[un]pack)
1437      * optimcycle is used for ARPACK iteration counter
1438        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1439      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1440        and add linear transforms where necessary
1441      * controls are initial/final SST, SSS (can be extended; need to check
1442        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1443    o mdsio: filename info to both stderr, stdout
1444    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1445      from sign change
1446    
1447    checkpoint55j_post
1448    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1449      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1450    o add consistent build directories and .cvsignore files to verification
1451    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1452    o make all subroutines 30 or less characters in length for certain older
1453      compilers to work (a thorough search only turns up two routines in
1454      pkg/ptracers)
1455    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1456      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1457    
1458    checkpoint55i_post
1459    o change arrays for total vertical diffusivity (2.D if explicit,
1460      3.D if implicit) ; each ptracer uses its own background value.
1461    o added mnc/NetCDF output capability to ocn_compon_interf
1462      - added bits to verification/cpl_aim+ocn so that it can run on
1463        ITRDA and other clusters without the mpirun "-wd" option
1464    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1465      configuration
1466    o give MNC the ability to create additional files rather than
1467      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1468      - the default is just less than 2GB which is a practical limit
1469        on many systems
1470    o Compute the non-local term using either KPP vertical diffusivity (=default)
1471       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1472    
1473    checkpoint55h_post
1474    o add verification test "vermix"
1475    o remove all the *_ioinc flags and replace with the single global
1476      outputTypesInclusive flag
1477    o allow to set a vertical profile of vertical diffusivity for T & S
1478    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1479    o useMNC moved from data.mnc to data.pkg
1480    
1481    checkpoint55g_post
1482    o Renaming carbon AD experiments to comply with testreport conventions
1483    o Updating adjoint of Held-Suarez hs94.1x64x5
1484    o Fixing directives for non-ECCO forward_step, after ECCO directives
1485      have been fixed to avoid recomp. of do_oceanic_phys
1486      Works well for global_ocean.90x40x15,
1487      but recomp. issue remains for carbon
1488    o Updating adjoint output for natl_box_adjoint after
1489      pkg/ecco has been modified (see taga c55d_post)
1490    
1491    checkpoint55f_post
1492    o rename to timeave_init_fixed
1493    
1494    checkpoint55e_post
1495    o some delicate re-shuffle of store directives to avoid one
1496      extra call of do_oceanic_physics
1497      affects ecco_the_main_loop.F, do_oceanic_physics.F
1498      checkpoint_lev1_directives.h
1499    o NB: this may break global_ocean adjoint temporarily,
1500      but it is clear how to fix it. Will do later, need this now.
1501    
1502    checkpoint55d_post
1503    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1504    o ecco_cost_weights is modified to 1x1 runs
1505    o modifs to allow observations to be read in as
1506      single file or yearly files
1507    o enable to read exf forcing fields as either
1508      single file or yearly files (flag useExfYearlyFields)
1509    checkpoint55d_pre
1510    
1511    o switch between 2-level and 3-level checkpointing
1512    o add ability of MNC to write local and "partial" (eg. 2D slices where
1513      the full 3D field is never actually stored) arrays to NetCDF files
1514      with the correct (that is, the complete multi-dimensional) set of
1515      array indicies
1516      - used in mom_vecinv() to write the diagFreq output
1517      - tested (demonstrated) in verification/aim.5l_cs
1518    o further mnc-ification
1519      - add verification/lab_sea to the list with mnc setups
1520      - fix undefined mnc v-names in cd_code
1521      - add kpp to mnc output (both snapshot and timeave)
1522    o non-hydrostatic code
1523      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1524        in calc_gw.F
1525      - defaults to viscAh
1526      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1527        friction or Leith) in non-hydrostatic mode, as long as there is
1528        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1529    o pkg/cost
1530      extend simple cost functions to treat time mean quantities
1531      (T,U,V) via cost_accumulate_state from cost_tile
1532    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1533        be 2 times larger than the minimum size the advection scheme requires.
1534        now get a perfect conservation of salt in advect_cs test-exp (updated)
1535    o GGL90 (Gaspar's TKE mixed layer)
1536      - add horizontal diffusion of TKE, requires exchanges in
1537        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1538        default. In OPA there is no horizontal diffusion of TKE but the
1539        mixing coefficients are computed from a horizontal average of TKE of
1540        6 points or so. I think that diffusion has a little more physical
1541        justification.
1542      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1543        was in vain)
1544      - mask tke-variable in ggl90_init
1545    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1546    o fix biharmonic diffusion on CS-grid.
1547    o more obcs stuff
1548      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1549        for reading boundary values. This routine is called from
1550        obcs_prescribe_read
1551      - updated obcs_check
1552      - changed sponge layer relaxation parameter units for days to seconds
1553      - turned off sponge layer by default
1554      - changed argument list of OBCS_CALC to myTime+deltaTclock
1555      - fixed about 35 bugs in obcs_external_fields_load
1556    
1557    checkpoint55c_post
1558    o obcs stuff
1559      - new runtime flags useOBCSprescribe, useOBCSbalance
1560      - re-arranged obcs_calc
1561      - moved exf_getobcs to obcs_prescibe_read
1562        obcs_prescibe_read is called after ORLANSKI stuff
1563        and independent of it (executable can contain all).
1564      - updated obcs_check
1565      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1566        These may be necessary only if tangential velocities are
1567        prescribed at OB, not sure, needs testing.
1568    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1569      which simplifies the calls and passes the ifc check-bounds test
1570    
1571    checkpoint55b_post
1572    o add a 2D scalar, Z location, exchange_2 routine.
1573    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1574      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1575      affects advect_cs results (for the wrong reason): update output.txt
1576    o use a more standard discretization for biharmonic viscosity ;
1577     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1578      affects results of dome set-up: update output.txt
1579    o fix gad_advection.F (CubedSphere part), back to version 1.23
1580    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1581    
1582    checkpoint55a_post
1583    o merged code to
1584      * prescribe/read time-dependent open boundaries
1585        (works in conjunction with exf, cal)
1586      * sponge layer code for open boundaries
1587      * each boundary N/S/E/W now has its own CPP option
1588        (healthy for the adjoint)
1589    
1590    checkpoint55
1591    o up-to-date adjoint of previous breaks
1592      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1593      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1594      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1595      - carbon: * remove tr1-related adjoint verification
1596                * add ptracer as control variable
1597    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1598      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1599    
1600    checkpoint54f_post
1601    o in verification/carbin/ remove experiment related to
1602      ALLOW_PASSIVE_TRACER (array tr1 etc)
1603      code_ad/ input_ad/ results_ad
1604    
1605    o add two new packages
1606      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1607        + subject to optimization (memory)
1608      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1609        + subject to reordering (many GOTOs in the original code)
1610        + so far opps is called for every (i,j) point, and then operates in
1611          the vertical; one may want to reorder the scheme in order operate in
1612          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1613          fields)
1614    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1615      - all verification tests compile and run with linux_ia32_g77
1616      - defaults are compatible with current input files--nothing
1617        should change if you were not previously using MNC
1618      - MNC output has been added in numerous places (eg. timeave)
1619        but there are still a few writes not yet do-able with MNC
1620        (this is in progress)
1621      - flags now allow for either/or/both use of MDSIO and MNC and
1622        documentation will soon follow
1623      - numerous small formatting cleanups for ProTeX
1624    o add version info (via BUILD_INFO.h) to MNC and stdout
1625    
1626    checkpoint54e_post
1627    o add two new packages
1628      - pp81 (Packanowski and Philander, 1981), Richardson number and
1629        stratification dependent mixing
1630      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1631      - these scheme operate in a similar manner as KPP (without ghat, of
1632        course), however there is only one diffusivity that is used for both
1633        temperature and salinity (and passive tracers)ç
1634    o add offline package
1635    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1636      provided by Stephanie Dutkiewicz
1637    o genmake2: add ability to search for C compilers and cleanup test output
1638      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1639    
1640    checkpoint54d_post
1641    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1642    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1643      leading to additional shift by 5 days each year of integration
1644       (i.e. leading to considerable offset over the years)
1645    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1646    o start with no AB and no initial filtering (staggerTimeStep):
1647      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1648    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1649      (external loading & cpl import/export stay in forward_step.F)
1650    o update coupling interface to work with new staggerTimeStep
1651    o change MDSIO ptracers_pickup.
1652    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1653    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1654    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1655    
1656    checkpoint54c_post
1657    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1658      this affects (truncation error) output.txt of test-exp:
1659       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1660    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1661    o change Qnet to always be the net heat flux, (+upward).
1662      affects (truncation error) output of natl_box exp.: updated
1663    o define the max number of passive tracers in PTRACERS_SIZE.h
1664    o start to test mnc routinely in exp0
1665    o add sea-ice loading (sIceLoad) as a new forcing field.
1666    
1667    checkpoint54b_post
1668    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1669       impressive on Altix and Opteron systems)
1670    o diagnostics can now write NetCDF files through the mnc package
1671    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1672    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1673    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1674      affects (truncation error) output of lab_sea & natl_box exp.: updated
1675    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1676    
1677    checkpoint54a_post
1678    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1679    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1680    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1681    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1682      + internal_wave (shift in writing cg2d_ini_res)
1683    checkpoint54a_pre
1684    
1685    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1686      - modified verification/lab_sea and natl_box_adjoint accordingly
1687    
1688    checkpoint54
1689    checkpoint53g_post
1690    o prepare splitting of thermodynamics: store convect.counter in common block
1691    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1692      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1693    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1694    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1695    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1696    o restore adjointability
1697    
1698    checkpoint53f_post
1699    o modifications that affect AIM experiment results (update output.txt):
1700      - no advection of S at top interface Nr (pkg/generic_advdiff)
1701      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1702    o AIM pkg:
1703      - include stability function into surf.Flux derivative relative to Tsurf
1704      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1705    
1706    checkpoint53e_post
1707    o merged cylindrical coord configuration
1708    o added rotating_tank experiment
1709    checkpoint53e_pre
1710    
1711    checkpoint53d_post
1712    o faulks upgraded: re-generate output.txt that have changed:
1713       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1714    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1715    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1716    o added Sadourny discretization of Coriolis
1717      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1718      - re-enabled use of omega3 (useAbsVorticity)
1719    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1720      vector-invariant equations
1721      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1722    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1723      hopefully without new bugs
1724      - still to do: biharmonic friction for non-hydrostatic w
1725    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1726    o regenerated output for global_ocean_ebm (using -ieee)
1727    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1728      of mom_common/
1729      - simple re-arrangement of instructions within computing loop
1730    checkpoint53d_pre
1731    
1732    checkpoint53c_post
1733    o new version of coupler for AIM+thSIce and Ocean models
1734     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1735     - land: change Evaporation of snow
1736     - aim with thSIce: fix bug in snow-precip.
1737    o changes to calc_gw.F
1738     - bug fix for w^2 term near the bottom boundary
1739     - (hopefully) improve the lateral slip boundary condtions for use with
1740        partial/looped cells
1741      - because the bug fix changes two verification experiments anyway (exp5
1742        and plume on slope), change the lateral boundary condition from half slip
1743        to the value of no_slip_sides
1744    o ebm package wasnt quite up to the parallel task. Fixed that.
1745    o Adjoint of EBM package + verification
1746      * TLM OK
1747      * ADM not sufficient accuracy yet (needs further testing)
1748    
1749    checkpoint53b_post
1750    o Commiting new energy balance model to repository
1751      * package is pkg/ebm
1752      * verif. is verification/global_ocean_ebm
1753      * references are in ebm_driver.F
1754    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1755    C        Global thermohaline circulation. Part I:
1756    C        Sensitivity to atmospheric moisture transport.
1757    C        J. Climate 12(1), 71-82
1758    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1759    C        Global thermohaline circulation. Part II:
1760    C        Sensitivity with interactive transport.
1761    C        J. Climate 12(1), 83-91
1762    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1763    C        Destabilization of the thermohaline circulation
1764    C        by atmospheric eddy transports.
1765    C        J. Climate 7(12), 1870-1882
1766    o Will need long integration testing.
1767    checkpoint53b_pre
1768    
1769    o created pkg/mom_common in preparation for variable viscosity code
1770    o renamed and split ini_mnc_io
1771    o pkg/land: only liquid water can diffuse or run-off
1772    o AIM using land: soil wetness availability account for snow
1773    o added printMapIncludesZeros to EEPARMS namelist
1774    
1775    checkpoint53a_post
1776    o restore TAMC compatiility for exf_constants.h
1777      (no usage of _d in .h)
1778    o Additional storing in KPP in an attempt to fix
1779      TAMC problem with adjoint of KPP code.
1780      (no success...)
1781      Identical code works fine with TAF.
1782    o Fixed verification/natl_box_adjoint experiments.
1783      Initial conditions for Experiments 4 and 5 are now
1784      set to "SEAICE_initialHEFF=0", which is more reasonable,
1785      and hence gives results closer to that of Experiment 2.
1786      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1787    
1788    checkpoint53
1789    o stable checkpoint with up to date adjoint
1790      TLM tests only run for 1st grdchk at the moment. Its unclear if
1791      this is a code problem or a problem with resetting code for g_
1792      variables that is being autogenerated wrong.
1793      Otherwise:
1794       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1795       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1796         are both still in chaos following their security messes.
1797    
1798    checkpoint52n_post
1799    o various build (mostly genmake2) changes including:
1800      - ability to build/run more easily within Cygwin and MacOS X
1801      - more complicated Makefiles with a stronger dependence on Gnu Make
1802    o pkg/seaice modifications
1803      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1804        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1805        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1806      - changed proxy for geostrophic velocity and updated
1807        verification/lab_sea/results/* accordingly
1808      - removed ADI dynamic solver from pkg/seaice
1809      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1810        they caused a segmentation fault under certain circumstances
1811      - removed unused field WATR
1812    o bug fix in exf-package:
1813      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1814         now reflect that.
1815    o small fixes in the cal-package:
1816      - set reference date to first of January for the 'model'-calendar
1817      - failing of cal_CheckDate in cal_FullDate now actually results in a
1818        warning
1819    o small modifications in exf-package to increase flexibility:
1820      - change climtempfreeze from a constant to a runtime parameter that
1821        is specified in data.exf_clim (default = -1.9)
1822      - introduce runtime parameter windstressmax (default = 2.0) that is
1823        specified in data.exf
1824    o fix in pkg/thsice:
1825      - update Evap (Tsf changes) to be consistent with Latent heat flux
1826      - maintain snow precipitation unchanged (even if Tsf >=0).
1827     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1828    
1829    checkpoint52m_post
1830    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1831      this does not change any of the results, because myIter=0 in swfrac always
1832      lead to jwtype=2 (the default anyway), but the call makes little sense
1833      as a default
1834    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1835    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1836      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1837    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1838    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1839    o extending useSingleCpuIO option to work with new exch2 I/O format
1840      - old-style, missing-tile I/O is still accessible by defining CPP
1841        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1842    o monitor package can write to NetCDF files and/or STDOUT
1843    o fix re-definition bug in MNC_GRID_INIT_ALL()
1844    o doc/api_reference added
1845      - a framework for building an API Reference Manual using all
1846        the "protex" comments embedded in the code
1847      - see pkg/generic_advdiff, pkg/mnc for examples
1848    o MNC:
1849      - make myThid the last argument for all subroutines
1850      - new default for the grid files: NO halos
1851      - add useMNC and other run-time flags
1852      - separate per-file-group handling of the unlimited dimension
1853      - early initialization of MNC w/ flags read at the eeboot stage
1854        and lookup tables set in initialize_fixed
1855      - write all MNC output to a freshly-created directory
1856    o thermodynamics sea-ice (thsice) is now tested with testreport.
1857    o test exp. advect_cs: use the standard cs32 grid ; update output.
1858    o Added functionality to grdchk:
1859      pick global i,j,k position (or nearest wet) where to perform check.
1860    
1861    checkpoint52l_post
1862    o new land formulation:
1863      a) use ground enthalpy as prognostic variable to ensure exact
1864         energy conservation.
1865      b) account for water temperature and for latent heat of freezing
1866         in all processes (rain, run-off, ground storage)
1867      c) compute surface and ground temperature implicitly.
1868    o aim_v23 modification for new land model:
1869      a) Treat separately land / ocean / sea-ice surface fluxes
1870         to allow implicit computation of land & sea-ice surface temp.
1871      b) add snow precipitation.
1872    checkpoint52l_pre
1873    
1874    o fix problem (when 1 tile is empty) in min/max monitor.
1875    o fix bug in timeAve (u,vZetatave in common block)
1876    o no restoring terms under ice for pkg/seaice
1877    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1878    o bug fix for pkg/seaice pickups
1879    o change MNC call locations and add coordinate attributes
1880    o mask vorticity at the corner ; affects global_ocean.cs output
1881    o fix ini_curvilinear_grid ; test CS experiments with mpi
1882    o aim.5l_cs: modify sea-ice fraction input file ; update output
1883    o exf: Adding simple range check routine for exf fields after read
1884    
1885    checkpoint52k_post
1886    o removed top-level directory "diags"
1887      - we migrated these functions to pkg/timeave a long time ago
1888    o fixed bug introduced in pkg/monitor
1889    o accuracy ctrlprec = 32 insuffient for gradient checks using
1890      averaged fields (I/O via cost_averages)
1891      -> use ctrl.h in active_file*.F to control I/O precision.
1892    o paramter list of CALL ADTHE_MAIN_LOOP
1893    o added initial do_the_model_io to ecco
1894    o set all ...Freq to zero after cost_final
1895      taveFreq, dumpFreq, pChkptFreq
1896    o MAIN and ECCO differentiability restored
1897    
1898    checkpoint52j_post
1899    o fix nchklev in tamc.h for global_ocean...
1900    o Bringing flow and store directives up-to-date
1901    o Really weird thing!
1902      call do_the_model_io from the_main_loop with parameters
1903      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1904      TAF places a faulty re-call of initialise_varia
1905      after cost_final call which should not be there!
1906    checkpoint52j_pre
1907    
1908    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1909      error messages
1910    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1911    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1912      debug output
1913    o modfied mdsio_writefield.F to handle non-global files under exch2
1914    o update AIM Cubed-Sphere exp (aim.5l_cs):
1915      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1916    o update AIM Equatorial Channel exp:
1917      use standard aim_v23 pkg and change the SST fields to be more realistic.
1918    o globalFile now works with exch2
1919    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1920      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1921    o limit timeave output for hi-res integrations
1922    
1923    checkpoint52i_post
1924    o removed CPP_EEOPTIONS.h from verification/*/code
1925    o updated the tiling for global_ocean_pressure
1926    checkpoint52i_pre
1927    
1928    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1929      the old pkg/aim).
1930    
1931    checkpoint52h_pre
1932    o shortened offending lines in exch2_send_rx?.template
1933    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1934    o genmake2: add build & execute test for NetCDF code
1935    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1936      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1937    o added useSingleCPUIO flag to monitor.F and mon_out.F
1938    o added temporary hack for sea-ice dynamics on the cube:
1939      metric terms are ignored and it is assumed that
1940      there is no sea-ice on cube faces 1, 2, 4, and 5.
1941    
1942    checkpoint52f_post
1943    o added exch2 cube routines to pkg/exch2
1944    o modified hs94.cs-32x32x5 to use it
1945    o added new grid files to hs94.cs-32x32x5
1946    checkpoint52f_pre
1947    
1948    checkpoint52e_post
1949    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1950      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1951    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1952      to work with implicit vertical advection and AB ;
1953    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1954    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1955     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1956    checkpoint52e_pre
1957    
1958    o fix bug in impldiff when Nr=1 or Nr=2.
1959    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1960    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1961    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1962      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1963    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1964    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1965    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1966    
1967    checkpoint52d_post
1968    o re-tiled many expts to allow comparison in multi-processor mode
1969      - updated output accordingly
1970      - changed hs94.128x64x5 to use intial T from file rather than use the
1971        random number generator
1972    o add infrastructure in model routines for fizhi and gridalt packages
1973    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1974    o changes to permit hi-res, cubed-sphere, configuration
1975      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1976      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1977      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1978        of surface winds for the cube
1979      (A verification experiment, based on global_ocean.cs32x15, but with
1980       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1981       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1982       complete with example surface forcing files and matlab scripts to look
1983       at the output and compare it with that of global_ocean.cs32x15.)
1984    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1985       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1986       to conform to the common rule.
1987    o check-in the first version of the coupler + interfaces for multi-components
1988       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1989       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1990       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1991       - ocean and atmos. share the same horizontal grid (no interpolation).
1992       - exchanges between component and coupler is done in forward_step
1993    o new verification experiment, cpl_aim+ocn:
1994       coupled ocean - AIM atmosphere on cs32 grid.
1995    
1996    checkpoint52d_pre
1997    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1998    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1999    
2000    checkpoint52c_post
2001    o Fixing OPTIONS files for use of exf:
2002      - ALLOW_ECCO not needed
2003      - ECCO_CPPOPTIONS.h should not be included from
2004        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2005        as has been the case in the past
2006      - All cal/exf related options are currently set in
2007        single header file. Should remain so until we
2008        agree on a consistent new policy.
2009    o Removed all CPP options for cal package.
2010      cal has no more CPP options.
2011    o modified STOREs in GAD_ADVECTION
2012    o corrected key comp. for passkey
2013    
2014    checkpoint52b_post
2015    o new version: "thsice" of thermodynamic sea-ice pkg:
2016     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2017     - modify fluxes but do not change theta directly;
2018     - light cleaning of bulk_force pkg (still needed with thsice).
2019     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2020       + output_thsice.txt to test thsice & bulk_force pkgs.
2021    o put back grid & coriolis monitor output.
2022    checkpoint52b_pre
2023    
2024    o call "do_the_model_io" at the beginning (=> dump initial state)
2025    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2026    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2027      (need info on NUMBER_OF_PTRACERS)
2028    o missing PTRACERS headers in some routines
2029    o default tamc.h in pkg/autodiff supposed to crash
2030      to ensure proper customization
2031    
2032    checkpoint52a_post
2033    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2034      - moved surfaceTendencyTice from pkg/seaice to main code
2035      - subroutine FREEZE_SURFACE now limits only surface temperature
2036        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2037        => new output.txt for global_ocean.cs32x15 & global_with_exf
2038      - keep the old version of FREEZE for backward compatibility;
2039        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2040      - corresponding modifs for TAF directives
2041    o added surface flux output variables to TIMEAVE_STATVARS
2042    o time-averaged output for pkg/ptracers
2043    o fix problem with ECCO-related divided adjoint
2044      snapshot file was missing some ad-variables,
2045      but no warning issued by TAF
2046    
2047    checkpoint52a_pre
2048    o some bug fixes for #undef REAL4_IS_SLOW
2049    
2050    checkpoint52 = ecco_c52_e35
2051    o after testing adjoints of checkpoint51u_post
2052    
2053    checkpoint51u_post
2054    o this is the post-merge tag of the ecco-branch
2055      (needs another clean checkout and re-testing)
2056    o various natl_box_adjoint configs and results
2057      but no input fields
2058    o obcs adjoint not yet merged!
2059    o adding ECCO global 1x1 and 2x2 degree configs
2060    o updated/extended some store directives for seaice
2061    o pkg/ecco now containes ecco-specific part of cost function
2062    o top level routines the_main_loop, forward_step
2063      supersede those in model/src/
2064      previous input data.cost now in data.ecco
2065      (new namelist ecco_cost_nml)
2066    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2067    
2068    checkpoint51t_post
2069    o this is the pre-merge tag of the ecco-branch
2070    
2071    checkpoint51s_post
2072    o cleanup: removed various obsolete #define-s
2073    o pkg/grdchk
2074      - renamed 'ph-grd 3' to 'grad-res'
2075      - merged from ecco-branch
2076        (remaining bug fixes for obcs gradient checks)
2077      - additional high-precision output for testreport
2078        (grep for 'precision_grdchk_result')
2079    
2080    checkpoint51r_post
2081    o cleaned up or removed CPP_OPTIONS.h files
2082    o updated results for some of the tests to reflect the new
2083      optfiles (-ieee: -O0 instead of -O3)
2084    
2085    checkpoint51q_post
2086    o cd_code:
2087      - moved cd_scheme.F -> cd_code_scheme.F
2088      - separate read_checkpoint from cd_code_ini_vars.F
2089      - separated cd_code part from write_checkpoint
2090      - updated AD_SOURCE, generated .flow
2091      - added CD_CODE_VARS.h to the_main_loop
2092      - Moving cd_code specific store dir.s to pkg/cd_code
2093    o ctrl package totally restructured
2094      - pack/unpack now optional and decoupled from
2095        xx_/adxx_ I/O
2096      - ctrl_pack/unpack cleaned
2097        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2098      - confined inclusion of AD_CONFIG.h to where necessary.
2099    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2100    
2101    checkpoint51p_post
2102    o create initial cd_code package
2103      - WARNING: the initialization of fields within packages
2104        is broken because INI_FIELDS (where READ_CHECKPOINT is
2105        called) is called *before* PACKAGES_INIT_VARIABLES.
2106        This seems to be backwards since
2107        1) its important to initially zero the entire field including
2108           the "halo" region
2109        2) zeroing needs to be done *before* reading pickup info
2110           and the pickup call might or might not happen in any
2111           particular run
2112      - this needs an overhaul for R2
2113    o cleanup verification/*/code/GMREDI_OPTIONS.h
2114    o cleanup testreport
2115    
2116    checkpoint51o_post
2117    o bringing AD-related verif's up to date with genmake2
2118      - carbon/
2119      - global_ocean.90x40x15/
2120      - hs.94.1x64x5/
2121      - (front_relax/ )
2122    o (more) consistent directory structure for AD-related verif.'s
2123    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2124    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2125    o bug fix in find_alpha.F for MDJWF:
2126      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2127        change rho -> rho-rhoConst
2128      - replace call find_rho to find_rhonum
2129    o initialisation of rFlx extended to full array (required by TAF)
2130      and shifted to thermodynamics
2131    o removed PTRACERS.h in ptracers routine
2132    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2133    o Correcting initialisations for fVerU, fVerV.
2134    o helping TAF to recognize dependency on kUp for
2135      fVerU, fVerV
2136    o Replacing delZ by delR in pkg/ctrl/
2137    checkpoint51o_pre
2138    
2139    o undid all of cp51 pending some cleanups and discussion
2140    o added the [#include "AD_CONFIG.h"] statement to all files that need
2141       it for adjoint/tl #defines
2142     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2143     o removed tools/genmake since it no longer works
2144    
2145    checkpoint51n_post
2146    o modifications to make FREEZE flux visible to pkg/kpp
2147      - moved surfaceTendencyTice from pkg/seaice to main code
2148      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2149      - subroutine FREEZE now limits only surface temperature
2150        (this means new output.txt for global_ocean.90x40x15,
2151         global_ocean.cs32x15, and global_with_exf)
2152    o added surface flux output variables to TIMEAVE_STATVARS
2153    
2154    checkpoint51n_pre
2155    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2156    o added [#include "AD_CONFIG.h"] to all files that use the following
2157      defines:
2158      - ALLOW_ADJOINT_RUN
2159      - ALLOW_TANGENTLINEAR_RUN
2160      - ALLOW_ECCO_OPTIMIZATION
2161    
2162    checkpoint51m_post
2163    o incorporating changes to get TAMC/TAF working in genmake2
2164      - added new TAMC/TAF targets to the Makefile
2165      - various cleanups related to package handling
2166      - these changes should have no impact on the forward model
2167    
2168    checkpoint51l_post
2169    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2170     - faster algorithm for cal_addtime.F
2171     - higher precision arithmetic, where needed
2172     - pkg/exf *startdate variables changed from calendar date to
2173       model integration time
2174    
2175    checkpoint51l_pre
2176    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2177    o enable to apply restoring on S & T only in a latitude band.
2178    o update output (external_forcing_surf modif. change truncation errors)
2179       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2180    
2181    checkpoint51k_post
2182    o change default to: useNHMTerms=.FALSE.
2183     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2184       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2185     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2186        exp1, ideal_2D_oce
2187     - change data file of oceanic exp (leave the results unchanged for now)
2188       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2189    o set gravitySign automatically according to the vertical coordinate used
2190      (and change sign: back to "logical" value: +1 when R increases downward)
2191    o added an include barrier to the default CPP_OPTIONS.h and
2192      removed the #include "PACKAGES_CONFIG.h" from it
2193    o fix a bug in mom_fluxform (from chk51j_post)
2194    
2195    checkpoint51j_post
2196    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2197    o adjusted some flow directives (dynamics, thermodynamics)
2198    o added cubed-sphere case to test cost function
2199    o heckpoint_lev?_directives.h now include
2200      pkg-specific directives, whenever those are enabled.
2201    o Moving pkg-specific flow directives to corresponding pkg
2202      Moving pkg-specific differentiation list to corresponding pkg
2203      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2204      ---> conventions are
2205           - pkg_ad.flow
2206           - pkg_ad_diff.list
2207           - pkg_ad_check_lev?_dir.h
2208    
2209    checkpoint51i_post
2210    o merge of the branch-genmake2
2211      - knowingly breaks the older genmake
2212      - automatic generation of all ALLOW_${PKG_NAME} defines
2213      - new testreport supersedes older testscript
2214    o large number of package inclusion and header cleanups
2215    checkpoint51i_pre
2216    
2217    o new output for adjoin of global ocean vector invariant
2218    o fix for checkpoint of thermodynamic seaice and bulk_force
2219    o Steph gchem various cleanups
2220    
2221    checkpoint 51h_pre
2222    o fixed some single quotes
2223    o modify gchem pkg to be more versatile
2224    o modifications to clean up dic pkg
2225    o add pkg/cfc
2226    
2227    checkpoint51g_post
2228    o provide links for ARPACK and ADM*TLM
2229    o start removing verification/vero/
2230    o update AD-related stuff
2231      (in particular some IF-statements in model/src/ routines)
2232    o adding to verification/global_ocean.90x40x15/ adjoint of
2233      vector invariant setup
2234    
2235    checkpoint51f_post
2236    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2237    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2238      of tracer Green's fucntions for ocean inversion project.
2239    
2240    checkpoint51f_pre
2241    o Added on-the-fly spatial interpolation capability
2242        "USE_EXF_INTERPOLATION" to pkg/exf.
2243      - This is a temporary Cartesian-grid hack until
2244        the super-duper ESMF coupler becomes available.
2245      - See verification/global_with_exf/README for usage example.
2246      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2247        flags and modified pkg/seaice accordingly.
2248    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2249        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2250        non-local transport term.
2251    
2252    checkpoint51e_post
2253    o pkg/mom_vecinv:
2254      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2255      - add time-ave diagnostic of vorticity advection.
2256    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2257    o atmospheric geopotential: - include water vapor effect;
2258                                - use p^kappa in p* scaling.
2259    o land pkg: read initial state from files.
2260    o AIM : add stratospheric drag in the upper level
2261    
2262    checkpoint51d_post
2263    o change function ILNBLNK (=> last non-blank char.) to return zero
2264      (instead of the string length) when the string. char is empty
2265    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2266    o modif's to restore TAMC compatibility
2267      - avoid "_d" constructs in PARAMETER declarations
2268      - avoid interrupting lines by comment lines
2269    o Use cluster local disks for purely local I/O
2270      vs. globally visible disks needed for ctrl stuff
2271      (merged from ecco-branch)
2272      - new active_file_loc... and mdsio_..._loc routines
2273      - affected packages: autodiff, ctrl, grdchk, mdsio
2274    
2275    checkpoint51c_post
2276    o introducing integer flag debugLevel
2277      - debLevZero: suppress all output
2278      - debLevA: standard
2279      - debLevB: equivalent to current debugMode=.TRUE.
2280    o introducing pathname variable mdsioLocalDir for mdsio
2281      that can be specified at runtime
2282      (relevant for cluster I/O to local disk)
2283    `
2284    >>>checkpoint51b_post
2285    adjoint of ptracers
2286    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2287    o extended state in checkpoint_lev?, etc.
2288    o alternative ctrl/cost with tr1 or ptracer
2289    o new comlev1_bibj_ptracers
2290    o new ptracers.flow
2291    o made ptracers_forcing same as external_forcing_s
2292    o added verification for adjoint with ptracers
2293      - adm. grdchk fail so far
2294      - tlm. grdchk OK
2295      - checked tapelev/comlev recomputations: OK
2296    <<<checkpoint51b_pre
2297    
2298    checkpoint51a_post
2299    o added code for biogeochemistry package
2300      - new pkgs: dic, gchem
2301      - new subroutine in ptracers
2302    o modify code for biogeo packages
2303      - in model/src and pkg/ptracers
2304    
2305    checkpoint51
2306    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2307      - autodiff, ctrl, exf, grdchk, seaice
2308      kept separate packages
2309      - cost, ecco, obcs
2310    o updating verification/internal_wave, verification/lab_sea
2311      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2312    
2313    checkpoint50i_post
2314    o Preparing next differentiable checkpoint and sync
2315      of MAIN vs. ecco-branch
2316      - 1st step: this one is differentiable
2317      - 2nd step: next(! not this) checkpoint will have updated packages
2318                  from ecco-branch)
2319    
2320    checkpoint50h_post
2321    o new package "land": provide surface BC for AIM.
2322    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2323    o AIM: use true log-P extrapolation for near surface temp (= as in
2324        F.Molteni paper) ; update aim.5l_cs output.
2325    o New variable in PARM03 for more flexible pickups
2326    o somewhat cleaned package initialisation sequence for
2327      ctrl/ cost/ ecco/ in packages_... routines
2328    
2329    checkpoint50g_post
2330    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2331      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2332      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2333        made the default because of faster convergence than ADI
2334    
2335    checkpoint50f_post
2336    o exf totally restructured
2337      - replaced all exf_set_ routines by one generic exf_set_gen.F
2338        and made sure it's still differentiable
2339      - split exf_getffields.F into new exf_bulkformulae.F
2340      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2341      - updated adjoint/makefile and relevant verif. accordingly
2342    
2343    checkpoint50f_pre
2344     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2345          + change Evap over land. (update aim.5l_cs output)
2346     o added missing .cvsignores and made uniform across expts
2347     o changed configuration of tidal_basin_2d expt
2348     o added pkg/debug functions for tracing code in fatal crashes
2349     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2350     o new fn in pkg/monitor to stop model if solution grows too big
2351     o removed lots of single quotes from comments
2352    
2353    checkpoint50e_post
2354    o make KPP work with PTRACERS
2355     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2356       nearly a copy of kpp_transport_s
2357     - there is no analogue to SurfaceTendencyS, so I have to use
2358       gPtr(of the surface layer) instead
2359    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2360    checkpoint50e_pre
2361    
2362    checkpoint50d_post
2363    o change kpp output from multiple-record state files to single-record state
2364      files analogous to write_state.F
2365    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2366      analogous to the cg2d-related output.
2367    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2368      so that writing to internal file fn (with length 512) fails.
2369    checkpoint50d_pre
2370    
2371    checkpoint50c_post
2372    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2373    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2374    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2375    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2376    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2377    
2378    checkpoint50c_pre
2379    Merging from release1_p13:
2380    o bug fix for pkg/seaice dynamic solver
2381    o Added SEAICE_initialHEFF to pkg/seaice
2382    
2383    checkpoint50b_post
2384    o store u*,v* in gU,V instead of in guNm1,gvNm1
2385    o in order to put the momForcing out of the Adams-Bashforth:
2386      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2387      to timestep.F
2388    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2389    o re-generate output for highly sensitive test-exp:
2390       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2391    
2392    checkpoint50b_pre
2393    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2394    o corrected CPP option mismatch in exf_Bulk... functions for case
2395      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2396    
2397    checkpoint50a_post
2398    o Bug fix for merging between c50 and KPP.
2399      ikey was passed from thermodynamics to kpp_calc via
2400      common block rather than being recomputed in kpp_calc,
2401      in contradiction with new key itdkey.
2402      New key ikppkey created, and tamc.h headers updated.
2403    
2404    checkpoint50
2405    - 2nd step of merge with ecco-branch:
2406      merge changes in ecco-branch back into main trunk
2407    - bug fix in find_alpha
2408    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2409    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2410    - merged some sliced AD support routines
2411    
2412    checkpoint49
2413    merged from ecco-branch:
2414    o exf:
2415      - Enable initialisation of forcing fields to constant
2416        (runtime) values.
2417      - in exf_getffields.F
2418        Reduce i-/j-loop to interior domain, discarding overlaps.
2419        That also fixes wrong TAF-key computations for key_1, key_2
2420        with bulf formulae.
2421      - exf_init.F modify #ifdef for exf_init_evap
2422      - exf_getffieldrec.F, ctrl_getrec.F
2423        The following INT-usages are not safe:
2424          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2425          fldcount = int(fldsecs/fldperiod) + 1
2426        and were modified.
2427    o autodiff: checkpoint_lev...
2428      - updated storing for bulk formulae (some arrays were missing)
2429      - added state for seaice package
2430      - synchronized with main branch
2431    o DIVA:
2432      Modif.s in
2433      - the_main_loop.F
2434      - the_model_main.F
2435      and added cost_final_restore.F cost_final_store.F
2436      o With these changes, it is possible to fully separate
2437        the first forward run to compute the cost function (mdthe_main_loop)
2438        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2439        into separate model executions.
2440        This enables better tuning of DIVA to given queue sizes.
2441      o Loss of cost function value in consecutive DIVA runs is
2442        fixed by storing to 'costfinal' file.
2443      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2444        beginning/end of adjoint integration is accounted for.
2445      The current changes apply to TAF-1.4.26.
2446      TAF has one remaining bug, requiring one manual change
2447      (see MITgcm manual).
2448    o cal: synchronized between MAIN and ecco-branch
2449    
2450    checkpoint48i_post
2451    o Changes to restore differentiability of code w.r.t. previous tag
2452      (mostly adding new routines to make list and replacing
2453      pressure by totPhiHyd).
2454    o Updated and merged grdchk package
2455      - has both ADM and TLM checks
2456      - works for single- and multi-proc.
2457      - output cleaned
2458      - worked successfully for parallel DIVA
2459    o genmake:
2460      - Adding -platform=SP4
2461      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2462    o Modif. for DIVA:
2463      ctrl_unpack should not be called in intermediate DIVA interval.
2464      (similar thing would apply for active files such as
2465      tbar, sbar, psbar, which should not be reinitialised;
2466      only relevant for ecco-branch)
2467    
2468    checkpoint48h_post
2469    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2470    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2471    o Added SEAICE_initialHEFF to pkg/seaice
2472    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2473    
2474    checkpoint48g_post
2475    --- EOS:
2476    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2477      store total Potential in totPhyHyd for diagnostics & EOS.
2478    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2479    --- Pressure/geopotential gradient:
2480    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2481    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2482      ( changes results of global_ocean_pressure )
2483    o NLFS + z-coord.: add eta*Rho' contribution.
2484    o accurate phiHyd when using interface-W at the middle between 2 centers
2485     ( changes results of ideal_2D_oce )
2486    o includes r* 2nd term in potential gradient.
2487    
2488    checkpoint48f_post
2489    Merging from release1_p12:
2490    o Modifications for using pkg/exf with pkg/seaice
2491      - improved description of the various forcing configurations
2492      - added basic radiation bulk formulae to pkg/exf
2493      - units/sign fix for evap computation in exf_getffields.F
2494      - updated verification/global_with_exf/results/output.txt
2495    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2496      (SBO) core products, including oceanic mass, center-of-mass,
2497      angular, and bottom pressure (see pkg/sbo/README.sbo).
2498    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2499      to avoid negative values in shallow regions.
2500      - updated verification/natl_box/results/output.txt
2501      - updated verification/lab_sea/results/output.txt
2502    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2503    o Added useSingleCpuIO option (see PARAMS.h).
2504    o Updated useSingleCpuIO option in mdsio_writefield.F to
2505      work with multi-field files, e.g., for single-file pickup.
2506    o pkg/seaice:
2507      - bug fix in growth.F: QNET for no shortwave case
2508      - added HeffFile for specifying initial sea-ice thickness
2509      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2510    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2511      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2512    o pkg/seaice:
2513      - adjoint-friendly modifications
2514      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2515    
2516    checkpoint48e_post
2517    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2518    o dynamics: change definition of computational domain & adapt mom_fluxform
2519      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2520    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2521        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2522        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2523        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2524        inverted_barometer solid-body.cs-32x32x1
2525      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2526    
2527    checkpoint48d_post
2528    o in preparation for r*:
2529     a) use pre-computed gradient of hydrostatic potential:
2530        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2531     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2532        => affects results of glob_oce_pressure (different truncation error)  
2533      update output.txt of ideal_2D_oce & global_ocean_pressure
2534    
2535    checkpoint48d_pre
2536    o in preparation for r*:
2537      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2538      pass the 2 comp. of the grad. as arguments to momentum S/R.
2539      but for the moment, only used if it does not change the results.
2540    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2541    
2542    checkpoint48c_post
2543    Modifications in treatment of initial flux forcing controls
2544    to avoid extra storing of flux fields.
2545    
2546    checkpoint48c_pre
2547    o Added tidal_basin_2d experiment (currently 1D!)
2548    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2549    
2550    checkpoint48b_post
2551    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2552     (modification to pressure gradient not yet implemented)
2553    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2554      (for U & V) that are used for vertical advection of momentum.
2555    
2556    checkpoint48a_post
2557    o In preparation for r*, use temp. array to compute vertical transport
2558       in flux-form momentum pkg. => change results of few test-exp.
2559      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2560                        lab_sea, natl_box & plume_on_slope
2561    
2562    checkpoint48
2563    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2564    
2565    checkpoint47j_post
2566    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2567    o moved adexch from forward_step to addummy_in_stepping
2568    o added exch in ctrl_map_...
2569    o aveFreq.=0. at end of cost_final to avoid overwrite in
2570      reverse checkpointing loop
2571    o Yet more changes in gmredi:
2572      * adgmredi_calc_tensor
2573        avoiding all recomputation of gmredi_slope_limit
2574      * adgmredi_x/y/rtransport
2575        added flag for excessive storing to avoid recomp. of
2576        u/v/rtans, dTdx/y/z
2577        -> this is not really necessary and very memory-consuming
2578      * adgmredi_slope_psi:
2579        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2580      * gmredi_slope_limit
2581        re-activated full calculation of taperfct for case 'ac02'
2582    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2583    
2584    checkpoint47i_post
2585    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2586    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2587      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2588    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2589    o gmredi: fix few bugs.
2590    
2591    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2592    This will be a good checkpoint to plug into the ecco-branch.
2593    o few modif.'s to get latest version adjointed
2594      (mainly kick out code in ini_linear_phisurf)
2595    o modif's to run adjoint with exactConserv
2596    o case GM_BOLUS_ADVEC should be cleaned
2597      S/R gmredi_slope_psi should be cleaned
2598    o verification/carbon now has exactConserv=.TRUE.
2599    
2600    checkpoint47g_post
2601    o time-average AIM output: becomes independent from statvars time-average
2602      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2603    o After TAF bug fix:
2604      Tested adjoint of gmredi package.
2605      Tests were done with checkpoint47 rather than with latest
2606      checkpoint47f_post since the latter is broken for the adjoint
2607      verification/carbon/ contains both ADM and TLM gradient checks.
2608    Here they are, before they get changed/lost/stolen.
2609    Mostly modif.'s to fix numerical sensitivities.
2610    Gradient checks OK for
2611    - GM_taper_scheme:
2612      * clipping
2613      * ac02
2614      * linear
2615      * glw91
2616      * dm95
2617      * ldd97
2618    - GMREDI_OPTIONS:
2619      * GM_VISBECK_VARIABLE_K
2620      * GM_NON_UNITY_DIAGONAL
2621      * GM_EXTRA_DIAGONAL
2622      * GM_BOLUS_ADVEC
2623    in conjunction with data.gmredi parameters to be checked in
2624    in a few minutes under verification/carbon/code/
2625    
2626    checkpoint47f_post
2627    Merging from release1_p10:
2628    o modifications for using pkg/exf with pkg/seaice
2629      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2630        and SEAICE_EXTERNAL_FLUXES
2631      - pkg/exf CPP options EXF_READ_EVAP and
2632        EXF_NO_BULK_COMPUTATIONS
2633      - usage examples are Experiments 8 and 9 in
2634        verification/lab_sea/README
2635      - verification/lab_sea default experiment now uses
2636        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2637    
2638    checkpoint47e_post
2639    o created a tag prior to creating a branch
2640    
2641    checkpoint47d_post
2642    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2643      at the bottom boundary had an erroneous half slip boundary condition
2644    o added bottom drag and no slip boundary condition capabilities to
2645      oceanic pressure coordinates code
2646    o added new verification experiment global_ocean_pressure, this experiment is
2647      also described in the tutorial section of the manual
2648    checkpoint47d_pre
2649    
2650    checkpoint47c_post
2651    o Added a verification experiment for a global cubed-sphere ocean run
2652      -  verification/global_ocean.cubed32x32x30
2653      -  uses pkg/therm_seaice and pkg/bulk_forcing
2654    
2655    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2656    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2657      when using P-coordinate; only implemented for atmospheric config.
2658    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2659      NOTES: requires option NONLIN_FRSURF to be "#define".
2660    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2661    
2662    checkpoint47b_post
2663    Merging from release1_p9:
2664    o pkg/seaice
2665      - removed GOTO's and added taf directives
2666      - double precision constants to reduce the g77 (Linux)
2667        to F77 (SGI) differences reported in release1_p8
2668    o tools/genmake
2669      - added SGI options
2670    o verification/testscript
2671      - updated to that of checkpoint47a_post
2672    o verification/global_ocean.90x40x15/input/eedata
2673      - modified for SGI f77 compatibility
2674    o verification/lab_sea
2675      - added description of sea-ice model
2676      - added missing matlab routines
2677      - added test of thermodynamics parallelization
2678    
2679    checkpoint47a_post
2680    o new pkg: aim_v23
2681     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2682       for now, keep the same surface forcing as before.
2683     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2684     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2685     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2686    o add diagnostic of surface correction term in monitor output
2687    
2688    o bulk_force and therm_seaice
2689    - Two packages:  bulk_force (Bulk forcing)
2690      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2691    - Earlier integration from Stephaine Dutkiewicz
2692      and Patrick Heimbach.
2693    - Two ifdef statements for compile time,
2694       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2695    
2696    checkpoint47
2697    differentiable version of checkpoint46n_post
2698    o bug fix in quasihydrostaticterms
2699    o * "clean" adjoint code (in terms of extensive recomputations)
2700        can now be obtained for all GMREDI options (i.e. for
2701        - GM_VISBECK_VARIABLE_K
2702        - GM_NON_UNITY_DIAGONAL
2703        - GM_EXTRA_DIAGONAL
2704        - GM_BOLUS_ADVEC )
2705      * However, wrong gradient check problem remains unsolved.
2706      * New CPP options have been introduced for different
2707        tapering schemes
2708    o external_fields_load now part of differentiation list
2709    o pressure needs multiple storing;
2710      would be nice to have store_pressure at beginning or
2711      end of forward_step, e.g. by having phiHyd global (5-dim.)
2712      (NB: pressure is needed for certain cases in find_rho,
2713      which is also invoked through convective_adjustment).
2714    o recomputations in find_rho for cases
2715     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2716    o #define ATMOSPHERIC_LOADING should be differentiable
2717    o ini_forcing shifted to begining of initialise_varia
2718    o Incorporating QNVS line search routines into MITgcm
2719      (this is separate code, and therefore not under pkg)
2720      lsopt/, optim/
2721    o Updated verification/carbon/
2722      - #define GM_VISBECK_VARIABLE_K
2723      - GM_taper_scheme    = 'ldd97'    
2724    
2725    checkpoint46n_post
2726    Merging from release1_p8:
2727    o verification/natl_box:
2728      updating new external_fields_load routine
2729    o New package: pkg/seaice
2730      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2731      The sea-ice code is based on Hibler (1979-1980).
2732      Two sea-ice dynamic solvers, ADI and LSR, are included.
2733      In addition to computing prognostic sea-ice variables and diagnosing
2734      the forcing/external data fields that drive the ocean model,
2735      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2736      The implied surface heat flux is then stored in variable
2737      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2738      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2739      non-local transport term.  Because this call precedes model
2740      thermodynamics, temperature under sea-ice may not be "exactly" at
2741      the freezing point by the time theta is dumped or time-averaged.
2742      N.B.: fairly large differences in accuracy occur across
2743            different platforms/compilers; comparison between
2744            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2745            generated output gives:
2746       T           S           U           V
2747      C D M    c        m  s        m  s        m  s        m  s
2748      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2749      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2750      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2751    
2752      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2753    o GAD:
2754      - generated new common blocks to account for call of
2755        same gad routines with differing traceridentities
2756        (needed to modify tracerIdentity indices in GAD.h)
2757      - generated separate common blocks for case useCubedSphereExchange
2758        (Department of Futurology)
2759      - parameter lists to gmredi_?transport: added tracerIdentity
2760      - added new key indices to tamc.h
2761    o external_fields_load:
2762      - added this routine to TAF list
2763      - needed to make some common blocks global and additional storing
2764        along the same lines as exf package (checkpoint_lev?_directives.h)
2765    o exf:
2766      updated external forcing package
2767      - bug fixes carried over from ecco-branch
2768        (missing OBCS_OPTIONS.h in two routines)
2769      - enable easy to use "no forcing".
2770      - added exf I/O for atmospheric loading
2771      - added exf I/O for runoff data
2772      - transfered scaling between exf <-> MITgcm to exf namelist
2773    o Adding new verification experiment global_with_exf.
2774      This verification experiment is almost identical to the
2775      global_ocean.90x40x15 experiment, except that it uses
2776      the exf (and cal) package instead of the
2777      external_fields_load routine (cf README file).
2778    
2779    checkpoint46m_post
2780    o modified testscript to return -- when there are no lines of "%MON" output
2781    o added new flag "quasiHydrostatic" for QH mode
2782      and new routine quasihydrostaticterms()
2783    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2784      New routine: mom_u_coriolis_nh()
2785    o fixed sign of non-hydrostatic metric terms in u and v equations.
2786      Depend on correct sign of gravitySign.
2787    o added work.pc* to .cvsignore in aim directories using ifc
2788    o introduced flag for controllin non-hydrostatic metric terms
2789    o removed gravitySign from PARM04
2790    o switched to g77/ifc from pgf77 in aim experiments
2791    
2792    checkpoint46l_post
2793    o made convective adjustment work with pressure coordinates:
2794     - changed the direction of k-loop in convective_adjustment.F for the
2795       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2796     - adjusted the reference pressure k-index in convective_adjustment.F
2797     - adjusted the convection condition in convect.F (in analogy to
2798       calc_ivdc.F)
2799     - convective_adjustment no longer computes anything on the halos
2800     - removed the warnings about negative salinity from find_rho.F and
2801       find_alpha.F; instead the new routine look_for_neg_salinity, called
2802       at the beginning of find_rho, find_alpha, and find_beta, does a
2803       check of the entire slice, if CPP-option
2804       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2805    checkpoint46l_pre
2806    
2807    checkpoint46k_post
2808    o fixed the verification/global_ocean.90x40x15 experiment:
2809     - new bathymetry (the world according to A., JMC, and M.)
2810     - new initial fields and forcing fields (*.bin files)
2811     - new POLY3.COEFFS (for the next release one should switch to a full
2812       equation of state: JMD95P or MDJWF)
2813     - fixed several errors and redundancies in the data file
2814     - experiment uses looped cells
2815     - added matlab directory with diagnostic scripts for plotting of output
2816    
2817    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2818     - read AIM physics parameters from a file (data.aimphys)
2819     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2820    
2821    checkpoint46j_post
2822    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2823    o move wVel computation at the end of the time step, in S/R integr_continuity
2824    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2825    o update timeave pkg for wVel diagnostic.
2826    checkpoint46j_pre
2827    
2828    checkpoint46i_post
2829    o Clean up AIM package (and keep the results unchanged):
2830      include CPP_OPTION and use IMPLICT NONE in all routines ;
2831      declare all the variables _RL ; use _d 0 for all numerical constants.
2832      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2833    
2834    checkpoint46h_post
2835    o cleaned up the use of rhoNil and rhoConst.
2836      - rhoNil should only appear in the LINEAR equation of state, everywhere
2837        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2838        and the dynamical equations are all divided by rhoConst
2839    o introduced new parameter rhoConstFresh, a reference density of fresh
2840      water, to remove the fresh water flux's dependence on rhoNil. The default
2841      value is 999.8 kg/m^3
2842    o cleanup up external_forcing.F and external_forcing_surf.F
2843      - can now be used by both OCEANIC and OCEANICP
2844    checkpoint46h_pre
2845    
2846     Added code to convert surface volume flux (fresh water) into
2847     a mass flux when using P coordinates in the ocean (OCEANICP).
2848     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2849    
2850    checkpoint46g_post
2851    o Include a new diagnostic variable phiHydLow for the ocean model
2852      - in z-coordinates, it is the bottom pressure anomaly
2853      - in p-coordinates, it is the sea surface elevation
2854      - in both cases, these variable have global drift, reflecting the mass
2855        drift in z-coordinates and the volume drift in p-coordinates
2856      - included time averaging for phiHydLow, be aware of the drift!
2857    o depth-dependent computation of Bo_surf for pressure coordinates
2858      in the ocean (buoyancyRelation='OCEANICP')
2859      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2860        Theta, Salinity, and Pressure in the parameter list. This routine is
2861        presently contained in find_rho.F. This routine does not give the
2862        correct density for 'POLY3', which would be a z-dependent reference
2863        density.
2864    o cleaned up find_rho
2865      - removed obsolete 'eqn' from the parameter list.
2866    o added two new verification experiments: gop and goz
2867      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2868    checkpoint46g_pre
2869    
2870    checkpoint46f_post
2871    o Enable tangent linear (forward mode) gradient checks:
2872      - extended active file handling to g_... files
2873      - added TANGENT_SIMULATION to theSimulationMode
2874      - extended grdchk package accordingly
2875    o added tangent linear setup in verification/carbon/code_ftl
2876    o added adjoint setup in verification/front_relax/code_ad
2877    
2878    checkpoint46e_post
2879    o Added new equation of state -> MDJWF
2880      - EOS of McDougall et al., 2002, JAOT, submitted
2881      - caveat: the equation of state is only valid for a smaller (more
2882        realistic?) range of values than JMD95P/Z and UNESCO
2883      - added masks to the calculation of pressure in store_pressure
2884      - added more check values for density in check_eos (ini_eos.F), some of
2885        the old check values are out of the range of the MDJWF-eos, so don't
2886        expect perfect matches for those
2887    checkpoint46e_pre
2888    
2889    checkpoint46d_post
2890    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2891      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2892      case of pressure coordinates. eosType='JMD95Z' in
2893      combination with buoyancyRelation='OCEANICP' now causes an error.
2894    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2895      in find_alpha/beta.
2896    checkpoint46d_pre
2897    
2898    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2899      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2900    
2901    checkpoint46c_post
2902    o Changes necessary for ocean in p-coordinates
2903     -  Added new buoyancy relation = 'OCEANICP'
2904     -  Added new parameters = gravitySign (this used to be contained inside
2905        the factor dRdZ which I added when we first switched to R coordinates).
2906     X GM/Redi is not compatible (yet)
2907     X bottom drag and no-slip need to be debugged.
2908    checkpoint46c_pre
2909    
2910    checkpoint46b_post
2911    o Added new equation of state -> JMD95Z and JMD95P
2912      - EOS of Jackett and McDougall, 1995, JAOT
2913      - moved all EOS parameters into EOS.h
2914      - new routines ini_eos.F, store_pressure.F
2915    o Added UNESCO EOS, but not recommended because it requires
2916      in-situ temperature (see JMD95)
2917    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2918      unesco.f to be used with POLY3
2919    checkpoint46b_pre
2920    
2921    checkpoint46a_post
2922    o Added (atmospheric) pressure loading
2923      - new field in FFIELDS.h, etc...
2924      - new cpp flag ATMOSPHERIC_LOADING
2925    o Changed hFacC to _hFacC in calc_phi_hyd.F
2926    o Added SHORTWAVE_HEATING to some files for consistency
2927    checkpoint46a_pre
2928    
2929    checkpoint46
2930    further merges from release1_p5
2931    o new ctrl package
2932      - adopted from ECCO environment to enable optimization
2933      - added Eliassen Palm fluxes to controls
2934    o added Eliassen Palm flux controls to gradient check package
2935    o cost package
2936      - Compatible with new ctrl package
2937      - added Eliassen Palm cost hooks
2938      - modif's of existing cost functions
2939    o Adjoint-related bug fixes in kpp:
2940      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2941      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2942    o autodiff package
2943      - flow directives:
2944        + new for S/R do_the_model_io
2945        + enhanced for S/R checkpoint
2946        + new gmredi.flow
2947      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2948        disable adcommon.h/g_common.h by default.
2949      - fixed problem for adjoint of global_max
2950    o modified verification/carbon/
2951    o New setup for adjoint of global_ocean
2952    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2953    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2954    o incorporated hooks for sponge layer code (external_forcing.F)
2955    
2956    checkpoint45d_post
2957    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2958    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2959      (affects plume_on_slope "cg2d" output)
2960    o add new parameter deltaTfreesurf for free-surface time stepping
2961    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2962    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2963    o change phiMin in exp1 (to agree with documentation)
2964    o add new flags:
2965     - T,S forcing inside/outside Adams-Bashforth
2966     - turn off temp,salt advection and/or forcing
2967     - for each tracer, define internal flag for multiDimAdvection & A-B
2968    o monitor: change definition of KE to check conservation of Energy
2969    
2970    checkpoint45c_post
2971    o Removed f90 comments ("!")
2972    o Modified initialisations to enable exf package for MITgcm
2973      (without invoking ECCO_PACKAGE).
2974    o modifications to gradient check package (Martin Losch)
2975      - enable centered differences
2976      - modified format of standard output
2977    
2978    checkpoint45b_post
2979    o cleaned exchange calls in cg2d
2980    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2981    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2982      to configure barotropic setup (Martin Losch)
2983    o moved some initialisations within bi,bj loop in dynamics
2984      (TAF flow dependency)
2985    o in initialise_varia, moved call packages_init_variables
2986      before convective_adjustment_init
2987      (corresponding adjustment of TAF tape initialisation).
2988    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2989    
2990    checkpoint45a_post
2991    o compute Rho over the whole domain (extend iMin,jMin indices)
2992    o specific exchange for X-slice domain (case Ny=1)
2993    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2994    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2995    
2996    checkpoint44h_post = checkpoint45
2997    o Fix to restore differentiability:
2998      place at which packages_init_variables is called in
2999      initialise_varia is crucial for reverse control flow.
3000    o modifications in GMRedi to enable stable adjoint
3001      (corresponding modif's in thermodynamics, dynamics)
3002    o added missing hook for sponge layer code in external_forcing
3003    o modified test cost functions
3004    o storing in gad_advection (plus removal of write(0,*)!
3005    o missing headers TR1.h added in convective_adjustment routines
3006    o errorMessageUnit set non-equal zero in eeboot
3007      (conflict on some platforms, e.g. IBM SP3)
3008    o modified carbon verif.
3009    
3010    checkpoint44h_pre
3011    o vertical grid option: allow to put the Interface at the middle between
3012      2 cell-centers ; replace delZ in pkg/kpp by drF.
3013    o GM Advective form: Tracers are advected using the residual transport (=
3014      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3015    
3016    checkpoint44g_post
3017    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3018      results) ; ifdef missing in thermodynamics.F
3019    
3020    checkpoint44f_pre,checkpoint44f_post
3021    o added PTRACERS package
3022      This allows an arbitrary number of passive tracers to be integrated
3023      forward simultaneously with the dynamicaly model.
3024      + Implemented so far:
3025        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3026        - I/O and checkpointing
3027        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3028      + Not implemented so far:
3029        - KPP
3030        - OBCS
3031      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3032        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3033        line in data.pkg.
3034      + This package is disabled by default since it increases storage.
3035    
3036    
3037    o testscript: added -cleanup option
3038    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3039                 b) enable to filter 2D fields.
3040    
3041    checkpoint44e_pre,post
3042    o re-wrote convective adjustment to use pre-calculated weights
3043      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3044      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3045      Original calls to convect() still in place.
3046    
3047    chkpt44d_pre,post
3048    o added missing EXCLUDE_MONITOR flags
3049    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3050      (incompatible typ in MIN/MAX expressions caused problems
3051      on IBM SP3)
3052    o in genmake added variable MAKEDEPEND
3053      plus resetting for case SunOS
3054    o added timer_stats.c routine for IBM SP3
3055    o removed variables in dynamics
3056    !!! I forgot to create tag chkpt44d_pre !!!
3057    !!! But chkpt44d_pre = chkpt44c_post    !!!
3058    
3059    o real fresh water flux implemented with non-linear free-surface.
3060    
3061    chkpt44c_pre,post
3062    o few fix (mask in shap_s2, EmPmR in external_field_load,
3063      USE_NATURAL_BCS in solve_for_P);
3064    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3065    
3066    checkpoint44b_pre/_post
3067    o merge of relevant stuff from the ecco-branch:
3068      - genmake: removed $S64 overwrite for case SunOS
3069      - pkg/exf: update and corrections for field swapping and obcs
3070      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3071                  harmonized between ECCO and MITgcm
3072      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3073                      updated checkpointing_lev... lists for obcs
3074      - model/src: minor changes in forward_step, plot_field
3075                   added directive for divided adjoint in the_main_loop
3076      - pkg/mdsio: added mdsio_gl_slice
3077    
3078    o check parameters & config (chkpt44a_pre,post)
3079    o OBC and NonLin_FrSurf.
3080    
3081    checkpoint44
3082    o fix bug in mom_vi_del2uv
3083    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3084    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3085    o update AIM experiments (NCEP input files)
3086    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3087    o added some stuff for AD
3088    
3089    checkpoint43
3090    o added two new advection tests
3091    o added global 4x4 degree ocean test
3092    o added test of H&S94 with free surface on cube
3093    o some final mods for gradient check, adjoint,...
3094    
3095    checkpoint42
3096      Fixed AD-related problems:
3097    o Store directives up-to-date with re-arranged Adams-Bashforth
3098      (mainly thermodynamics.F)
3099    o New store directives for multi-dim. advection schemes
3100      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3101      * new common block and key passkey
3102      (mainly gad_advection.F)
3103    o Modified store directives for split of dynamics/thermodynamics
3104      for the case ALLOW_KPP
3105    o Cleaned argument list for timestep_tracer.F
3106    
3107    checkpoint41
3108    o re-formatted/added comments in prologues of key subroutines
3109      to work with protex
3110    
3111    checkpoint40
3112    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3113    o added FLT (floats) package from Arne along with demo. experiment
3114    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3115      implementation of forward-in-time forcing terms
3116    o more mods for non-linear free-surface including new variable
3117    o modified multi-dim method to work on cube
3118    o bug fix in KPP (from DM)
3119    
3120    checkpoint40pre9
3121    o added DST advection schemes
3122    o fix MPI bug on SGI's
3123    o modifications for non-linear free-surface
3124    o fixed conditionals for fixed flow/passive tracer only mode
3125    o added tension/strain form of stress tensor
3126    o changes to commenting of arguments for TAF/TAMC
3127    o added/updated many matlab scripts
3128    o added multi-dimensional advection method for tracers
3129      
3130    checkpoint40pre8
3131    o new package rw/
3132      Added method for dumping intermediate local arrays:
3133      mdsio_writetile - same as mdsio_writefield except works from inside
3134                        bi,bj loop
3135      mdsio_writelocal - same as mdsio_writetile except works for local
3136                         arrays
3137      write_local_r? - higher-level wrapper for mdsio_writelocal
3138      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3139      Example given at end of mom_vecinv.F that dumps some local arrays.
3140    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3141      control flux-form versus vector invariant code.
3142      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3143      or genmake -DISABLE ...
3144    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3145      (additional storing is now needed for case vecinv;
3146      currently nothing implemented to switch this storing off
3147      in case fluxform is used since no CPP flag available).
3148    
3149    checkpoint40pre7
3150    o bug fix in dynamics.F
3151      calc_viscosity called before k=1,Nr loop.
3152    o added some #ifdef's ALLOW_PASSIVE_TRACER
3153    o cleaned initialisations in ctrl_map_ini
3154      related to TAF
3155    
3156    checkpoint40pre6
3157    o split dynamics into thermodynamics & dynamics
3158    o corresponding split of calc_diffusivity into
3159      calc_diffusivity, calc_viscosity
3160      (kpp_calc_diff, kpp_calc_visc).
3161    o Added diffkr, kapgm to control variables
3162    o bug fix in gmredi_slope_limit for ldd97
3163    
3164    checkpoint40pre5
3165    o proper initialization of Adams-Bashforth time stepping
3166      + uses forward step for very first step of model (iter=0)
3167    o re-generated *all* output since almost all output is modified by this
3168      change (sorry but we've been putting this one off for about 2 years)
3169      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3170        *not* regenerated since they are already out of date and I don't
3171        want to create the impression that they are suddenly working.
3172    o removed KAP stuff for DEC's
3173    o modified/added many .cvsignore files in */code and */input
3174    o added new expt "solid-body.cs-32x32x1"
3175      + this uses an alternative form of ini_curvilinear_grid.F which
3176        is not necessarily any better than the current one...
3177    
3178    checkpoint40pre4
3179    o added re-initialisations of utrans,vtrans,rtrans in
3180      calc_common_factors which are crucial for TAF.
3181    o extended iMin,jMin range for calc_common_factors,
3182      calc_diffusivity
3183    o added option ALLOW_PASSIVE_TRACER
3184    o a few minor updates and fixes
3185    
3186    checkpoint40pre3
3187    o created calc_gtr1.F for gad package
3188    o split the_main_loop and re-introduced forward_step
3189    o some recomputations of nIter0 for TAMC
3190    
3191    checkpoint40pre2
3192    o Updated to latest branch of AJA, JMC
3193    o Added gradient check package
3194    o Added routines for passive tracer handling
3195    o Added carbon sequestration sensitivity experiment
3196    
3197    checkpoint39
3198     o Modifications and fixes to support TAMC
3199       (mainly missing or wrong directives)
3200     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3201       in addummy_in_stepping
3202     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3203     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3204     o Included following packages:
3205       cal: calendar
3206       exf: external forcing
3207       ecco: essential routines to control use of cal, exf
3208             (NB: this is not the full ECCO environment)
3209     o disabled some packages by default in genmake
3210    
3211    checkpoint38
3212     o see notes_c37_adj.txt
3213     o corrected wrong layer index in external_forcing_t
3214     o replaced the_main_loop/forward_step by the_main_loop
3215     o removed forceoutput from write_state
3216       (replaced criteria for initial/final state)
3217     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
3218    
3219    checkpoint37
3220     o mdsio.F routine split and packaged in pkg/mdsio
3221       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
3222        used unless genmake -disable=mdsio)
3223     o allow a more precise surface-geopotential gradient for the atmosphere
3224       taking into account the change in space of Alpha (=1/rho) at the surface.
3225     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
3226       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
3227     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
3228       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
3229       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
3230     o Time-Average diagnostics defined as a pseudo package "timeave".
3231     o pickup files : old pickup (before c35) did not work with new code (c35
3232       and after) unless activating 2 commented lines in initialise-varia.
3233     o Non-Hydrostatic pickup file Pb fixed.
3234     o bug with Rigid-lid version (since c35) fixed.  
3235    
3236    checkpoint36
3237     o implement Crank-Nickelson barotropic time-stepping
3238     o recover Time-Average diagnostics
3239     o fix Pb in checkpoint (PR#19)
3240     o AIM become a standard package ; clean unused CPP_kees
3241    
3242    checkpoint35
3243     o subtantial rewrite of dynamics.f
3244     o allows staggered time-stepping
3245     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
3246     o added bottom drag (linear + quadratic)
3247    
3248    checkpoint34
3249     o Modified exchange routines for correct reverse simulation.
3250     o Added verification output to comply with bug fix in impldiff.F
3251       as of c33 (exp2, natl_box).
3252     o Corrected store directives in dynamics.F
3253     o Corrected array boundaries in impldiff.F
3254     o Corrected array dimensions in gmredi.
3255       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
3256     o Added routine GLOBAL_SUM_INT to global_sum.F
3257     o Added mdsio_gl.F for ECCO purposes.
3258    
3259  checkpoint33  checkpoint33
3260   o Fixed bug in lower BC in impldiff.F   o Fixed bug in lower BC in impldiff.F
3261   o Fixed confusion about units of forcing arrays in FFIELDS.h   o Fixed confusion about units of forcing arrays in FFIELDS.h

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