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revision 1.38 by heimbach, Tue Apr 10 22:35:24 2001 UTC revision 1.838 by gforget, Tue Jun 19 03:44:19 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 pkg/smooth: addition to model/src and pkg/ctrl so allow
8     initialization of pkg/smooth and application to control vector
9    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
10    o dependencies: pkg/profiles requires pkg/cal
11    o pkg/profiles:
12     - added option ALLOW_PROFILES_GENERICGRID
13         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
14         that interpolation information (grid points and coefficients) is provided
15         within the netcdf input files.
16         -> sample matlab scripts can be found in MITgcm_contrib/gael
17         that allow you to prepare netcdf input files.
18     - also modified: cleaner include statements, cleaner error print statements,
19       cleaner stops when error, and more tests of the netcdf input files consistency.
20    
21    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
22    o pkg/seaice:
23     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
24       requires a new routine: seaice_diagnostics_fill.F
25     - make sure that seaice does not move if not forced (pressure replacement
26       method, Hibler and Ip, 1995), changes results
27     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
28     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
29       It is turned off by default (=-1.), because it changes the results.
30     - make it possible to read AREA from a file, too.
31    
32    checkpoint59c
33    o add S/R and diagnostics for oceanic mixed-layer depth
34    o move GMRedi call after all vertical mixing schemes (including KPP)
35    o pkg/thsice:
36     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
37      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
38    o pkg/obcs:
39     - bug fix for balance code
40    o pkg/seaice:
41      - allow values of SEAICE_elasticParm > 1
42      - add new parameter SEAICE_evpTauRelax as an alternative
43        to SEAICE_elasticParm
44      - make lsr boundary conditions free slip (by default), changes result
45      - add code for no slip boundary conditions for lsr
46      - set minimum of zeta to zero (and not 4e8) (changes results)
47      - add a cap on AREA after advecting AREA if seaice_growth is not called
48    o change calculation of Visbeck K:
49      - no longer depend on tapering scheme; instead, compute slope (limited
50        by GM_maxSlope). this is equivalent to what was comuted before with
51        clipping or linear tappering.
52      - fix vertical averaging (wrong by 1/2 level)
53      - leave the old version (but will not be maintained) within
54        #ifdef OLD_VISBECK_CALC / #endif
55      - update output of exp. ideal_2D_oce
56    o change error catch in calc_r_star to improve vectorization
57    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
58      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
59    o adjoint:
60      Re-organized adjoint checkpointing according to Matt Mazloff
61      (but with modifs/completions/cleanups)
62      Storing is now bundled into large arrays to optimized I/O
63      (and second step in cleanup of the_main_loop)
64    
65    checkpoint59b
66    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
67      - export/import (between ocean & coupler) fields needed for ocean DIC.
68    o pkg/seaice:
69      - get rid of three more exchanges seaice_calc_viscosities (required
70        different loop boundaries in seaice_lsr and seaice_ocean_stress)
71      - bug fix in seaice_ocean_stress (update of lab_sea required)
72      - reduce loop boundaries to necessary minimum also in seaice_evp
73      - go back to the old way of computing deltaC/Z as the adjoint likes that
74        better
75    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
76      passive tracer to an Age Tracer) + update output.txt
77    o pkg/exf:
78      - implement A-grid / C-grid selection for wind-stress input files.
79      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
80      for now, in exf_bulk_largeyeager04.F only :
81      - change implementation for case where windspeed + 2. components wind-stress
82        are read-in. AND use rhoConstFresh to convert evap.
83    o pkg/seaice:
84      - use correct EXCH_UV for wind-forcing (on A-grid).
85      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
86        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
87    o pkg/exf:
88      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
89      EXF_INTERPOLATION:
90      - merge global_with_exf/code version of exf_interp_read.F
91        to the main code ;
92      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
93        reading the file ; Important: This options needs to be defined to recover
94        previous code.
95        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
96      - no longer loose real*8 precision along the way when using exf_iprec=64.
97    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
98      - change discretisation of evp-solver in order to avoid another exchange
99        (changes lab_sea) and clean up a little
100      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
101        help the adjoint (this also changes the results slightly)
102      - add a few "_d 0" where they had been missing in seaice_evp.F
103      - cleaning up: remove unused seaice_calc_rhs.F
104    o pkg/exf: some cleaning-up:
105      - change various "constants" into runtime parameters
106      - cleaned-up Large&Yeager04 routine which should eventually
107        replace exf_bulkformulae.F (changed names of S/R and CPP)
108        and merged various ALLOW_ATM_WIND options
109     only used with thsice pkg (in thsice_get_exf.F):
110      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
111        which are used when useStabilityFct_overIce=TRUE (= the default)
112      - change default values of ice & snow emissivity and scale downward LW
113        by ice & snow emissivity.
114    o pkg/thsice:
115     fix few little problems, in thsice_calc_thickn.F:
116      - growth vertically (and not laterally) if iceFrac == iceMaskMax
117      - melt only laterally if hIce < hThinIce (as the comments say)
118      and in thsice_extend.F:
119      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
120      - start to form ice as soon as the minimum ice-volume is reachable.
121     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
122      and cpl_aim+ocn
123    o pkg/kpp
124     - move computation of surface related input fields to KPP into a new
125       subroutine kpp_forcing_surf.F
126     - remove wrong (within bi,bj loops) EXCH calls.
127     - little cleaning (add argument myThid in last position, cvs header ...)
128     - for now, fix conservation problem by exchanging KPPviscAz (may not
129       be the best fix)
130    o pkg/seaice
131     - check for inconsistent evp parameter/cpp-flag combination
132     - remove leftover errIO flat for obsolete name list error handling
133    o OpenAD
134     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
135    
136    checkpoint59a
137    o pkg/seaice: some parameter clarifications and a little bit of clean up
138    o pkg/thsice: rename run-time parameters:
139       himin       -> hIceMin
140       himin0      -> hThinIce
141       hihig       -> hThickIce
142       i0          -> i0swFrac
143       transCoef   -> bMeltCoef
144       frac_energy -> fracMelting
145      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
146       with default values (for now) that do not change the results.
147      remove old version of thsice vars advection in pkg/seaice.
148    o in FFIELDS.h:
149      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
150      - make pLoad & sIceLoad always available (but still only used if
151         ATMOSPHERIC_LOADING is #define).
152    o pkg/kpp: replaced _KPP_RL with _RL
153    o bug fixes for vertical diffusivity computations when both KPP and
154        3D diffusivity arrays are used.
155    o pkg/seaice: fix bug in evp solver, while doing that
156      - change (improve?) discretization of stress computations for both
157        cgrid-lsr and evp solver
158      - add a new routine to compute strain rates
159      - the above changes lab_sea results
160      - add no slip conditions for evp solver (off by default), lsr-version
161        may follow
162      - fix exchange for shear at Z-points (does not change lab_sea)
163      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
164        (to force the user to pick a time step since there is not "safe" way
165        of choosing it)
166      - add principal stress diagnostics
167      - rearrange fields for evp a little to avoid having to call a: too many
168        exchanges and b: exchanges for stress trensor components which we do
169        not have.
170      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
171        of evp, complete rewrite for lsr case (latter is does not yet work
172        in all cases)
173    o pkg/kpp: add code to have mixing in shelf ice caverns
174      - add myThid to all kpp routines (long overdue)
175    
176    checkpoint59
177    o pkg/exf:
178      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
179        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
180      - move exf header files from lower_case.h to UPPER_CASE.h ;
181        add missing cvs Header & Name
182      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
183      - add namelist param. selectStressGridPosition, exf_monFreq
184      - retire many _CLIM routines, and remove data.exf_clim
185        + params moved to data.exf
186        + climsst, climsss now handled by exf_set_gen, i.e.
187          climss?period=0 refers to constant field,
188          climss?period=-12 to monthly forcing
189      - split up namelists in data.exf
190    o pkg/seaice:
191      - remove seaice_exch and seaice_exch_uv
192      - remove superfluous exchange of theta
193      - add myThid to seaice_budget_ocean/ice
194      - add new interface for atmospheric wind forcing (C-grid only)
195        + new routine
196        + two new field (taux, tauy for stress over ice)
197        + removed one global field (DAIRN) for C-grid case only
198    o pkg/thsise
199      - 2nd set of modifs for thsice adjoint in conjunction with exf
200    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
201    
202    checkpoint58y_post
203    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
204      vertical diffusivity, similar to that in MOM4; turned on using
205      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
206      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
207    o Added capability for 3D specification of background vertical diffusion
208      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
209      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
210      "data" file that contains the 3D vertical diffusivity coefficients.
211    o ice dynamics (pkg/seaice) with thsice thermodynamics:
212      - add code within pkg thsice to advect & diffuse sea-ice fields
213      similar to (and will replace) what has been added in  seaice_advdiff.F,
214      but: - conserving Mass, Heat & Salt.
215           - better when using non-linear advection scheme (not yet fully tested)
216           - can also be used in atmospheric set-up (for now, only the diffusion).
217    
218    checkpoint58x_post
219    o IO option for global-file compact format:
220      - add options when generating topology (utils/exch2/matlab-topology-generator)
221      - add I/O capability (pkg/mdsio).
222      - adapt utils/matlab/rdmds.m to read this format.
223      for now long-line format not yet supported by pkg/mdsio (& exch2).
224    o shelfice: add a few diagnostics
225    
226    checkpoint58w_post
227    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
228      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
229      (and replace horiVertRatio in NH code).
230      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
231                         and tutorial_plume_on_slope (sensitive to truncation)
232    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
233      directly to drive seaice model (C-grid only)
234    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
235     - reintroduce computation of wind from stress,
236     - compute tau (in exf_bulkformulae.F) from windstress averaged to
237       mass points to avoid tau = 0
238     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
239    o rdmnc.m: make it work with "global" files created with gluemnc
240    o rdmnc.m : some improvements in dealing with singleton dimension
241      (tested on all testreport mnc output files).
242    o genmake2: disable pkg/profiles if netcdf test fails.
243    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
244    o move call to cal_readparms up to make calendar parameters/variable available
245      to all packages
246    
247    checkpoint58v_post
248    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
249      useDynP_inEos_Zc tested.
250    o pkg/exf: changes to properly interpolate/mask/scale initial fields
251    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
252      and portions thereof.  See read_cs.txt for description and examples.
253    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
254      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
255      following the great-circle arc between those 2 points.
256    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
257      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
258    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
259     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
260     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
261     - still needs work (not working with some options ; efficiency to improve)
262       and serious testing.
263     - use this scheme for temperature & salinity in 2 advection test exp.:
264       advect_xy & advect_xz, respectively.
265    
266    checkpoint58u_post
267    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
268    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
269    o testreport: add option "-skipdir" to skip some test.
270    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
271      momentum calculation.
272    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
273    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
274      remove checkpoint.F and the_correction_step.F (no longer used);
275      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
276    o add option (linFSConserveTr) to correct for tracer source/sink due to
277      Linear Free surface
278    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
279    o pkg/thsice: fix reading mnc-pickups
280    
281    checkpoint58t_post
282    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
283    o pkg/mdsio:
284     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
285       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
286       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
287     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
288     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
289       either MDS_READ_FIELD or MDS_WRITE_FIELD )
290     - new S/R (to replace MDSWRITEMETA), which allows to write more
291       informations (variable names, time ...) to meta files.
292     - modify rdmds.m to give back the meta file content.
293    o pkg/diagnostics: change vertical interpolation to be safer, and more
294       flexible (define p-levels to interpolate to in data.diagnostics);
295      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
296       diagnostic pointer.
297    o pkg/seaice: more cleaning up of seaice_growth, added many comments
298    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
299    o fix multi-category seaice:
300     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
301       SEAICE_MULTICATEGORY
302     - fix short wave heat flux
303    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
304       and allow to use EVP solver. Change forward lab_sea: test both EVP
305       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
306    o Initial check-in of lab_sea adjoint
307      (very similar to natl_box_adjoint/code_seaice)
308      * used C-grid and EVP solver
309      * used KPP, GM/Redi
310      * uses inAdExact=.TRUE.
311      * gradient checks fail for both ADM and TLM
312        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
313        f.d. gradients actually seem more problematic than ADM, TLM gradients;
314        issue is related to forward mismatch between g77 an ifort
315    o pkg/seaice: overhaul of thermodynamics
316     - growth.F and groatb.F are replaced by new routine seaice_growth.F
317     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
318     - move a few global fields out of SEAICE.h into seaice_growth.F and
319       make them 2D (FICE/QNETO/ ...)
320     - remove FO (it is the same as QNETO)
321     - introduce a few local fields to avoid modifying external fields such
322       as atemp, etc.
323    
324    checkpoint58s_post
325    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
326      changed exf_set_gen.F so that
327        genperiod=0 means input file is one time-constant field and
328        genperiod=-12 means input file contains 12 monthly means
329    o CG2D: use pre-computed solver main-diagonal (stored in common block);
330      this affects truncation error ; generate new output file for exp. which
331      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
332        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
333        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
334        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
335        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
336        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
337    o start implementation of deep-atmosphere and anelastic formulation
338    o verification: remove 2nd copy of input files and use script "prepare_run"
339      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
340    o mom_common/vecinv/fluxform: fix a few initialisation isssues
341    o profiles: fix for multithreaded case
342    
343    o diagnostics: rename few diags:
344      s/'PRESSURE'/'RCENTER '/g
345      s/'TICE    '/'oceFreez'/g
346      s/'TAUX    '/'oceTAUX '/g
347      s/'TAUY    '/'oceTAUY '/g
348      s/'SWFLUX  '/'oceQsw  '/g
349      s/DIFx/DFxE/g
350      s/DIFy/DFyE/g
351      and add few ocean-forcing diagnostics:
352      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
353    o modifications to pkg/seaice/growth.F and budget.F, which change results of
354      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
355      as actual snow thickness.  It now refers everywhere to effective snow
356      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
357    
358    checkpoint58r_post
359    o modifications to pkg/seaice/growth.F, which change results of
360      lab_sea experiment: fixes pertain to melting snow over open water, to
361      masking EVAP under sea ice, and to using the correct AREA variable for
362      computations of EVAP, PRECIP, HSNOW, and GHEFF
363    o add ability to read bathy, salt, and theta using MNC (off by def)
364    o add flooding algorithm and advection of HSNOW for pkg/seaice;
365      both are turned off by default and do no change any results
366    o seaice advection with pkg/thsice: a step toward the use of non-linear
367      advection scheme, but #ifdef or commented out for now (requires more EXCH).
368    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
369      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
370      in natl_box (affects results @ truncation level: update output.txt)
371    o multi-threading and IO:
372      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
373      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
374        (needed to work with SingleCpuIO): tested in all verif. exp.
375    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
376      affects the results (but none of the verification test uses this scheme).
377    o Adding some pkg/diagnostics capability to pkg/seaice
378      (will certainly be subject to changes)
379    o ctrl: adding new control variables:
380      lwflux, lwdown, evap, snowprecip, apressure, runoff
381    
382    checkpoint58q_post
383    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
384      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
385      high_res_cube configuration by 4% on Columbia.
386    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
387      add (in global_with_exf/code) a version of EXF_INTERP_READ without
388      dynamical allocation (seems to work in multi-threaded).
389    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
390      single CPU io) so that TAF does not have to see EESUPPORT.h
391    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
392    
393    checkpoint58p_post
394    o obcs: stop if obcs is used with useCDscheme = .true.
395    o shelfice:
396     - fix a sign error so that no slip at shelfice interface works
397     - remove stop for combination non-hydrostatic code and shelfice. That does
398       not mean, that the results are correct, but at least they are numerically
399       stable
400    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
401    o added adjoint exch routined for all exch*3d* routines
402      and updated flow directives
403    
404    checkpoint58o_post
405    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
406      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
407    o change controling S/R for writing pickup file (new S/R do_write_pickup)
408      and clean-up reading/writing of pickup files.
409    o fix local version of read/write pickup (NH part) in rotating_tank/code
410    o simplify EXCH interface:
411     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
412     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
413    o added the regrid package
414    o shelfice:
415     - add a simple boundary layer scheme to reduce noise
416     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
417    
418    checkpoint58n_post
419    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
420       local variable (not in common block).
421    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
422      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
423      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
424        to work with SingleCpuIO.
425    o add "_d 0" to real constant of pkg/cfc subroutines ;
426       update exp. cfc_exemple & tutorial_cfc_offline output files.
427    o multi-threading and IO:
428      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
429        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
430      - barrier before and after reading.
431      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
432      - avoid using MDS_WRITELOCAL for LAND pkg output.
433      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
434        common-block variables ; Allows multi-threading with master-thread IO.
435    o change default MAX_NO_THREADS from 32 to 4 ;
436      and stop cleanly when MAX_NO_THREADS is too small.
437    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
438    
439    checkpoint58m_post
440    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
441       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
442    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
443       keep global_ocean.90x40x15 (for AD testing) with former secondary test
444       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
445    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
446        add MITgcm_tutorials (= code + all the tutorials)
447    o ecco, option to compute cost for total ssh (mean+anom)
448    o consistent with addition of ptracer and ssh in pkg/profiles
449    o profiles: adding ptracer and ssh
450    o testreport: change multi-test output-file name
451      (from output.txt.{name} to output.{name}.txt)
452    o profiles: now ok for mutli-tiles case
453    o seaice: add 4 parameters for different advection schemes for area,
454      (effective) seaice thickness, enthalphy, and snow height. Their default
455      is the standard parameter SEAICEadvScheme
456    o calc_gw:
457     - add cosFacU in zonal viscous flux (harmonic.visc.).
458     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
459       of tutorial_plume_on_slope.
460    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
461    o calc_gw: true flux-form, account for horizontal grid spacing.
462      update rotating_tank results, but not plume_on_slope (affected at
463      truncation level, 11 digits).
464    
465    checkpoint58l_post
466    o calc_gw:
467     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
468     - remove side-drag for now (need to fix it); update plume_on_slope results.
469     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
470    o commit code to make SST/SSS weights spatially variable
471      (based on either variable in-situ or variable initial T/S weights)
472    o pkg/ecco:
473      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
474        now based on horizontally varying weights wthetaLev, wsaltLev
475      * cost_averagesflags now returns year indices in addition to day, month
476      * sflux balance is performed on annual basis
477        (sflxumm, sfluxmm2, bal_sfluxmm)
478      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
479        including separate counting and multipliers
480    o pkg/rbcs
481      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
482    
483    checkpoint58k_post
484    o testreport:
485     - always build in dir. "build" (if not there, mkdir build instead of building
486       & running in input)
487     - run in dir run (if it exists), in build otherwise.
488     - call prepare_run (if input/prepare_run exists)
489     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
490    o pkg/exf modifications to interpolation and rotation routines for more
491       reasonable treatment of North Pole singularity: for tracers North Pole
492       value is set to northernmost zonal-mean value, for zonal velocity it is
493       set to zero, and for meridional velocity it is set to northernmost value.
494    o pkg/exf/exf_check_range.F
495     - add tile index to diagnostics and move stop statement to the very
496       end of the routine.
497    o pkg/diagnostics: (diagnostics_main_init.F)
498      define title of isomorphic variables according to the current config.
499    o pkg/thsice with pkg/seaice dynamics:
500    - fix domain of computation (interior only, required for exf) and do exchanges
501    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
502    o towards a standard way of dealing with multi-threading in MONITOR
503      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
504    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
505       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
506    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
507    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
508    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
509       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
510    o tracer advection:
511     - clean-up and simplify calc_common_factors.F
512     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
513       advection subroutine (but still not used within DST advection S/R)
514    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
515    
516    checkpoint58j_post
517    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
518      from file (collects calls previously in FORWARD_STEP)
519    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
520    o adjoint store dir. adjusted accordingly
521    o genmake2
522      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
523    
524    checkpoint58i_post
525    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
526      on wind stress (SEAICEstressFactor defaults to 1.)
527    o Total number of Timers is finite (<=40): comment out 2 non-essential one
528      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
529    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
530      on CS-grid: no longer loosing mass.
531    o exf & curvilinear-grid: no longer modify longitude xC & xG.
532    o pkg/ggl90: fix sloppy output and fix a bug
533    o pkg/seaice: added SEAICEuseEVPpickup parameter
534      - Set to false in order to start EVP solver with
535        non-EVP pickup files when using SEAICEuseEVP
536      - fix sign error in diffusion in seaice_calc_rhs
537    
538    checkpoint58h_post
539    * Modifications for bottom topography control
540      o replace hFacC by _hFacC at various places
541      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
542      o add non-self-adjoint cg2d_nsa
543      o update autodiff support routines
544      o re-initialise hfac after ctrl_depth_ini
545      o works for 5x5 box, doesnt work for global_ocean.90x40x15
546    * Adding verification for 5x5 box (4-layer) bottom topography control
547    
548    checkpoint58g_post
549    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
550       used for mean seasonal cycle, mean diurnal cycle); add an example
551       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
552    o pkg/ggl90:
553      - add parameter (minimum surface kinetic energy)
554      - fix bug (avoiding division by zero)
555    o couple pkg/thsice to pkg/seaice:
556      - modify advection in seaice to accomodate new scalar fields to be advected
557      - only muliDimAdection scheme work with seaice/thsice
558      - mapping of thsice-variables to seaice-variables, back and forth
559      - does not break the verification experiments, but does not give the
560        desired results either
561    o pkg/seaice
562      - make (default) second order advection a bit less confusing?
563    
564    checkpoint58f_post
565    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
566      to pkg/seaice):
567      - new routines thsice_map_exf and thsice_get_exf provide the interface
568      - add an additional formal parameter to thsice_solve4temp
569    o pkg/exf:
570      - add new fields wspeed, snowprecip (to be able to couple to thsice)
571      - correct Stefan-Boltzmann constant
572      - new parameter for longwave surface emittance
573      - separate some stuff from exf_bulkformulae into new routines  
574        exf_radiation, exf_wind
575      - add new parameters and constants: longwave emissivity for ocean, ice
576        and snow, evaporation parameters over ice
577      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
578        either wind from stress or stress from wind
579    o pkg/thSIce:
580    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
581    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
582       and THSICE_CALC_THICKN
583    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
584    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
585      to make debugging easier.
586    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
587    o pkg/bulk_force:
588      - clean-up comments and parameters ;
589      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
590    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
591      generate new output for test-experiment: aim.5l_cs.thSI
592    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
593      testreport accordingly
594    
595    checkpoint58e_post
596    o SEAICE_CGRID adjoint done
597    o R_STAR adjoint implemented.
598      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
599      * need to sort out init. of h0facc, etc.
600    o Make pkg/profile fully independent of ecco,cost, etc. stuff
601      to be able to use it in pure forward.
602    
603    checkpoint58d_post
604    o upgrade simple test-experiment to tutorial example:
605     step.1: duplicate the experiment and (step.2) will remove the old copy.
606      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
607      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
608      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
609      tutorial_global_oce_biogeo    <- copy of dic_example
610      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
611      tutorial_plume_on_slope       <- copy of plume_on_slope
612      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
613      tutorial_global_oce_optim     <- empty for now (David ?)
614      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
615     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
616    o correct a sign problem in cost_scat.F
617    o obcs and ptracers: fix boundary conditions for advections schemes
618      with larger stencil
619    o thsice adjoint: start
620    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
621      completeness
622    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
623      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
624    o ptracers adjoint:
625      * avoid extensive recomputatations
626      * fix missing re-init. of gptr (missed by TAF)
627    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
628      me to turn off the excessive output to STDOUT that this package produces
629    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
630      and add those terms in Vector-Invariant formulation.
631    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
632      if the control period (xx_hfluxperiod etc) is 0
633    o in profiles pkg, clean routines and fix details
634    o in ecco pkg, reading ssh data:
635      fix problem in case the model does not start at iter0=0
636    o fix mnc-pickup/restart for ptracers
637    o new package prifiles:
638      code to compute profile-based cost by Gael Forget
639      (modifs in ecco, ctrl, autodiff)
640    o Benign bug fix in initialization (spotted by M. Mazloff) of
641      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
642    
643    checkpoint58c_post
644    o adjoint: finish NLFS adjoint and provide reference output in
645      verification/global_ocean.90x40x15/results_ad_nlfs
646    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
647      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
648      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
649      with SEAICE_CGRID defined.
650    o move calendarDumps from "data" to "data.cal" and clean-up the code
651      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
652    o add useEXF & useCAL flags (for now, set in hard-coded way)
653    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
654      (were missing in NH mode, and wrong in quasihydrostatic mode).
655      waiting for Chris updated version of calc_gw to add those CALLs.
656    o fix bug in quasihydrostatic S/R ;
657      add a test for this option: global_ocean.90x40x15.qshyd
658    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
659      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
660    o add on/off flag useOffLine for package OFFLINE
661    o seaice:
662      - modify advection so that it works also on the C-grid
663      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
664        problem in multi-tile runs with C-grid
665      - add flags for clipping ice velocities and/or masking solver forcing
666      - fix drag (ocean on ice) formulation and a bug that caused noise in the
667        C-grid solver
668      - added a few comments to seaice_diffusion.F
669      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
670        are now exclusive)
671      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
672        required re-ordering the code a little:
673       + make DAIRN global variable (defined in SEAICE)
674       + move computation of the viscosities eta and zeta into a new separate
675         routine (because I need to recompute them in seaice_ocean_stress.F)
676    
677    checkpoint58b_post
678    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
679      update output.txt of exp. aim.5l_cs.thSI
680    o various mnc cleanups and improvements:
681      + shrink lookup tables by factor of ~4
682      + better error reporting when running out of lookup space
683      + able to handle longer path/file names (up to 500 chars)
684    o adjoint:
685      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
686      - TBD: "hidden" mom_vecinv recomp. in dynamics
687    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
688     (allow to differentiate between forcing components using new integer flags:
689      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
690     and add new flag to put Dissipation tendency out of Adams-Bashforth.
691    o ecco
692      - enable trend removal from SSH anomaly obs.
693    o adjoint
694      - a fix for PmEpR when #undef EXACT_CONSERV
695      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
696      - try to fix "hidden" recomp. in forward_step for NLFS
697        (NLFS seems broken sometimes after I checked it in)
698    o seaice:
699     - add c-grid version of the dynamic solver:
700       + three new routines that are the c-grid substitute lsr, dynsolver
701         and ostres
702       + put a few fields that were local to dynsolver into global common
703         blocks, so that I can move the computation of stresses etc into
704         seaice_lsr (saves coding but may break the adjoint).
705     - replace more hardwired parameters by runtime parameters
706     - add ice masks that mask the rhs of the implicit solvers where there
707       is no ice (commented out in seaice_dynsolver, because i am not sure
708       if this works properly), eventually this should replace the clipping
709       of ice velocities in seaice_dynsolver to +/-40cm/s.
710    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
711      include it only where its needed
712    o move balancing of fluxes before the call of external_forcing_surf
713    o seaice:
714      - correct units of turning angles (now they are really in degrees)
715      - move computation of GWATX/Y out of main routine into dynsolver
716      - initialize GWATX/Y in seaice_init
717    o Apply mask on Fresh-Water flux (needed for SSH forcing).
718      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
719    o seaice: add runtime flags for turning angles (default to zero)
720    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
721      and trend from exf forcing and ctrl control adjustments
722    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
723      (since checkpoint57x_post)
724    o change the default rotation period to 86164.s = the Earth rotation
725    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
726      and based on a reference stratification. Tested within hs94.cs-32x32x5.
727    o seaice advection: add code for choosing between the default (2nd order
728      central differences) and multiDim advection schemes provided by
729      pkg/generic_advdiff
730    o seaice:
731      - removed all references to SEAICE_GRID.h fields from
732        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
733        (cubed-sphere configuration will change a little)
734      - grid computations in seaice_init are obsolete now.
735      - cleaned up code a little so that is easier to read (hopefully).
736      - added new (better?) discretizations of default advection and diffusion
737        (turn on with SEAICEuseFluxForm)
738      - replace 1 in 3d global fields by kSurface in growth.F
739      
740    checkpoint58a_post
741    o seaice:
742      - bug fix in advect.F
743    o shelfice:
744      - separate shelfice load anomaly from pload (breaks with time
745        dependent forcing), => introduce constant field shelficeLoadAnomaly.
746        Its default is 0., but it may be computed more cleverly from (unknown)
747        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
748        done offline. A good approximation of the pressure load anomaly is
749        necessary to avoid large initial adjustment processes underneath
750        deep-reaching shelfice.
751      - small fix in ISOMIP shelfice_thermodynamics
752      - add more sophisticated thermodynamics of Hellmer (1989), this is
753        now the default
754      - give a few constants more intuitive names
755    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
756      if bulk formulae are used in long integration (especially EmPmR). Turn
757      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
758      if balancePrintMean, the imbalance that is substracted is printed to
759      STDOUT.
760    o fix bug (typo) in obcs_apply_eta.F
761    o add a new package shelfice which enables us to model the circulation
762      underneath shelf-ice with draughts of hundreds of meters.
763     - works
764     - to do: + include improved thermodynamics
765              + check whether kSurfC (from model/inc/SURFACE.h) can be used
766                instead of new field kTopC
767              + can we use topoFile, Ro_surf and existing code in ini_depth.F
768                instead of new field R_shelfIce and new code in ini_depth.F
769                and ini_mask_etc.F?
770              + adjust vertical mixing schemes?
771    o seaice pkg:
772     - add a cpp-flag to include a simple formula for a salinity dependent
773       freezing point of sea water at the surface
774     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
775       meridional stresses are now different (and hopefully correct)
776    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
777       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
778       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
779    o pkg/diagnostics: add options and parameters for regional-statistics
780       diagnostics ; define regions by reading a region-mask from a file
781       (might add other options later)
782    o pkg/bulk_force:
783     - add option and parameters to use AIM surface-flux formulae.
784     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
785       others forcing fields (defined in PARM05, parameter file "data") are loaded
786       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
787     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
788     - use the right EXCH call for uwind,vwind (to work on CS-grid).
789     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
790       and parameters (note: calcWindStress replaces .NOT.readwindstress).
791     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
792    
793    checkpoint58
794    o add "--embed-source" option to genmake2 which, when the supporting
795      tools can be compiled (as determined by genmake2) will turn on the
796      embed_files package which then embeds the entire MITgcm source code
797      (*.[fFhc] + Makefile) used for the build within the executable
798      - requested by CNH but off by default
799      - adds a paltry <9MB to the mitgcmuv executable in most cases
800      - only writes the output when useEMBEDSRC in eedata is true
801    o clean up 3-dim. relaxation codes:
802      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
803      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
804      * Thanks to Tom Haine for testing!
805    
806    checkpoint57z_post
807    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
808      affects output (@ truncation level) of exp. plume_on_slope ; updated.
809    o fix the pickup behavior for obcs in combination with ptracers
810    o fix a bug in ptracers_external_fields_load
811    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
812      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
813    o transfered surface NH pressure to eta field (if exactConserv).
814    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
815         and update lab_sea output.txt file.
816    o completing 3-dim. relaxation code: additional term
817         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
818      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
819      * At compile time, in "EXF_OPTIONS.h" set
820          #define  ALLOW_CLIMTEMP_RELAXATION
821          #define  ALLOW_CLIMSALT_RELAXATION
822      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
823          tauThetaClimRelax3Dim = 15552000.0,
824          tauSaltClimRelax3Dim  = 15552000.0,
825      * 3 cases:
826          1) Use a constant-in-time 3-dim. field
827          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
828          3) Real-time relax. to time-evolving prescribed field
829    o Adding Laplacian-type smoothness constraint on
830      initial and boundary (forcing) controls (ic, bc)
831      * enable at compile-time via
832        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
833      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
834      * Absolute scale somewhat unclear so far
835      * no area weighting was included since no other cost term does so far
836    
837    checkpoint57y_post
838    First step for a NLFS adjoint
839    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
840    o new init. routines for calc_r_star, calc_surf_dr
841    o still need to deal with ini_masks_etc
842    o testreport seemed happy
843    checkpoint57y_pre
844    
845    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
846    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
847    o add new offset feature to offline pkg (plus minor cleanup)
848    o cfc fixes for final year of integration
849    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
850      be in GCHEM_OPTIONS).
851    
852    checkpoint57x_post
853    o fix testreport Pb in multiple test experiment.
854    o cleanup our namelist syntax in verification:
855      - make it more F95 standards compliant (some work still needed)
856      - allows the vast majority of our tests to work with gfortran
857    o Non-Hydrostatic:
858     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
859     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
860    o Allow to apply AB on T,S rather than on AB(gT,gS):
861     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
862     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
863       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
864     - need a "clever" read_pickup to restart from the other AB formulation
865    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
866    o remove some unused variables (reduces number of compiler warnings)
867    o adjoint
868      * Disable useVariableViscosity for adjoint for time being
869        (there are a number of extensive recomputations)
870      * Initialize certain variables needed for adjoint
871    
872    checkpoint57w_post
873    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
874                 fix the singleCpuIO RS version of MDSWRITEFIELD
875       and add a WARNING if using globalFiles=T with multi-processors.
876    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
877      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
878    o tracer advection scheme:
879      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
880       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
881       was not very convenient).
882      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
883       (further tests needed for the implicit DST & Flux-Limiter schemes).
884    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
885      and sRef for convenience, handy, when you want to initialize
886      ptracers in a large domain with a constant non-zero value. Also,
887      untangle ptracers_init.F a little.
888    
889    checkpoint57v_post
890    o change dome exp. to use variable viscosity in side-drag terms.
891    o remove all the files from the cfc_offline test since they are now
892      incorporated into tutorial_cfc_offline which has been producing
893      identical results for a few days of testing
894    o add new parameter: sideDragFactor to enable half-slip-side BC
895      and change side-drag S/R to use viscosity from mom_calc_visc
896      (can switch back by setting sideDragFactor=0.); affects results at
897      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
898       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
899    o vorticity & strain are now computed without masking, to account for
900      no-slip-side BC in variable viscosity calculation ; mask is applied
901      anyway later on, before computing advection/coriolis terms.
902    o modify exp4 to test new obcs support for reading from external files
903      and for passive tracers
904    o fix behavior of ptracers_monitor when monitor output is written to a
905      netcdf-file; still not independent of monitor.F (writes in the same
906      file).
907    o change default value of tRef (put a uniform, meaningful value for ocean
908      & atmos) and initialize sRef (was missing, as Martin mentioned).
909    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
910      to be proportional to enstrophy dissipation length.  Thus,
911       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
912      This is now consistent with Smagorinsky and with the manual.
913    
914    checkpoint57u_post
915    o OBCS and PTRACERS: add open boundary support for passive tracers
916      - either use homogenous (pseudo) v.Neumann conditions or prescribe
917        OB-values from file; this is not different from the way theta and salinity
918        are treated
919      - however, Orlanski-radiation conditions are not supported, and the model
920        will stop if you use pTracers and Orlanski at the same time.
921      - beefed up the rountine obcs_external_fields_load: now only those open
922        boundary values are overwritten with values from files for which there
923        are really files, otherwise the OB-fields remain untouched. This makes
924        it possible to use different OBs at different ends of the domain (as
925        with EXF)
926    o reduce number of exch calls in shap_filt (s2).
927    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
928      truncation level) 4/5 MLAdjust test results (11&12 digits match).
929    
930    checkpoint57t_post
931    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
932    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
933      same truncation, independent of the face number: affects affects several
934      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
935    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
936      note that biharmonic viscosity + no-slip was not tested in any experiment.
937    o fix bug in non-linear free-surf side-drag ; generate new output for
938      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
939    o make mnc honor the writeBinaryPrec flag for most kinds of output
940    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
941    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
942      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
943    o add brackets in multi-terms sum to get same truncation, independent of
944      the face number (manage to get exactly same value of gU,gV at the cs-edge)
945      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
946    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
947      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
948      a maximum grid-scale Reynolds number.  Also, changes all length calculations
949      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
950      Suggested values of viscosity parameters found in mom_calc_visc.
951      Many new viscosity diagnostics available.
952    
953    checkpoint57s_post
954    o Add clearing-house for viscosity calculations, mom_calc_visc and
955      correct numerous bugs in LeithD and Smagorinsky discretizations.  
956      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
957      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
958      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
959      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
960      The Strain-Tension form is now called with useStrainTensonVisc=.true.
961      ViscAhStrain and viscAhTension are now retired.
962    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
963    o In response to JMC's bug report, genmake2 now ignores any soft-links
964      that it finds in the *current* directory when searching for files.
965      Soft-links found in any other source directories will still work as
966      they did before.
967    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
968      a C routine to unlimit the stack size
969    o mnc-ify pkg/aim snapshot vars
970    o mnc-ify pkg/land as requested by Daniel
971    o various changes to mnc including:
972      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
973      - output can now be grouped so that all files within a group
974          change the ITER portion of their names in lock-step together
975      - can now read ("global") PER-FACE (in addition to PER-TILE) files
976          and works with both EXCH1 and EXCH2 (but needs more testing)
977      - writing works for all verification test cases w/ g77 on Linux
978    
979    checkpoint57r_post
980    o make MNC variable initialization happen earlier
981    o add diagnostics for (almost) each term of the momentum Eq.
982    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
983    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
984    o remove MINIMAL_TAVE_OUTPUT option ;
985      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
986    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
987      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
988    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
989    o add time-dependent SST, SSS control
990    o cost terms in ecco/ modularized (new cost_generic.F)
991    o cost_averages routines are modularized (new cost_averagesgeneric.F)
992    o new infrastructure for seaice model vs. obs misfits in seaice/
993      * driver from the_main_loop.F is seaice_cost_driver.F
994      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
995      * gradient check in Exp. 6a of natl_box_adjoint/
996    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
997      (see README file)
998    
999    checkpoint57q_post
1000    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1001    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1002      - bug was reported by Jean-Michel and Ian Fenty
1003    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1004      update exp. cpl_aim+ocn output.
1005    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1006      Needed for high-res. runs with large global files
1007      to be able to limit tapelev size
1008    o Changed some tests for adjoint:
1009      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1010      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1011      * global_ocean.90x40x15/ back to default 3-level checkpointing
1012    o Modifications to enable scripted COMMON to MODULE conversion
1013      * verification/OpenAD/code/ has necessary scripts and description;
1014      * converts, compiles and runs successfully;
1015    
1016    checkpoint57p_post
1017    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1018    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1019      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1020    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1021    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1022      (was already the case for dissipation with mom_vecinv,
1023       and also the case for grad.PhiHyd when staggered-timeStep)
1024      This will allow to put dissipation out-off the AB time-stepping.
1025     Unfortunately, affects truncation error. Update output of exp. that "fails"
1026      (cg2d matching number) and leave the others for later: front_relax(10),
1027      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1028      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1029    
1030    checkpoint57o_post
1031    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1032      (2) its ready to be documented during the 20050801 DocFest
1033    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1034      for ideal_2D_oce and lab_sea on linux_ia32_g77
1035    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1036      in global1x1_tot/code_seaice_adj to access indices 32, 33
1037      (worth another tag)
1038    
1039    checkpoint57n_post
1040    o adding precip control xx_precip 32
1041    o adding swflux control xx_swflux 33
1042    o Replacing 10 forcing penalty cost routines by 1 generic.
1043    o Implementing partitioning in time-mean and variable adjustment
1044      for atmos. state.
1045    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1046    o in natl_box_adjoint:
1047      * updated exp 1 to 10
1048        (but does not have time-mean vs. variable split results yet)
1049    o updated global1x1/*_seaice_adj/
1050      to incorporate latest changes
1051    o enable useSingleCpuIO for mdsio vector routines
1052      (applies in particular to tapelev I/O)
1053    o removed inefficient K-loop in all active_file*control*.F
1054    
1055    checkpoint57m_post
1056    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1057      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1058    o pkg/exch2: filling of face-corner halo regions is optional
1059      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1060    
1061    checkpoint57l_post
1062     tag before updating tutorials (pre-release-2)
1063    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1064       for output and interpolation of input fields onto model grid)
1065    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1066       Affects results of exp. rotating_tank ; update output.txt.
1067    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1068          and taking the square quantity and/or using a fraction-weight field.
1069    o fix aim_diagnostics_init.F mate numbers.
1070    o add mnc output capability to diagnostics/diagstat and update
1071      our cvsignore files for the ACSII output generated
1072    
1073    checkpoint57k_post
1074    o lab_sea now uses diagnostics package and provides a suite of
1075      new EXF diagnostics output.
1076    
1077    checkpoint57j_post
1078    o exf
1079      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1080        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1081        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1082      * extended diagnostics output
1083        - now includes all EXF variables
1084        - hs, hl moved to common block
1085        - separate S/R for diagnostics, called after ctrl vector is added
1086        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1087        - EXFqnet contains true Qnet (i.e. includes qsw)
1088      * updated verif. lab_sea, global_with_exf
1089      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1090        to ensure that diagnostics sees a true EXFqnet
1091    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1092    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1093      several times with different frequencies.
1094    o mnc-ify the thsice package as requested by Daniel Enderton
1095      - the monitor--MNC output needs work
1096      - many attributes need to be added (most are currently blank)
1097    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1098      - many attributes need to be added (most are currently blank)
1099    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1100    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1101    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1102      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1103         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1104    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1105     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1106    
1107    checkpoint57i_post
1108    o Diagnostics package was changed: diagnostic allocation is now deactivated
1109      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1110    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1111      add 1rst Order upwind vertical Shear.
1112    o add a quick fix for A/B checkpointing in OFFLINE mode
1113    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1114      end-run around the C/Fortran linking horror in eesup/src/timers.F
1115    o added pkg/runclock: allows user to terminate run based on wall clock
1116    o added non-hydrostatic scaling parameter: nh_am2
1117    o pkg/my82: futile attempt to make results compiler-independent by adding
1118      some "_d 0", etc. no effect.
1119    o for mnc output, fill the 'T' coordinate var with myTime and create a
1120      separate 'iter' variable for iteration count
1121    o pkg/diagnostics:
1122      add new capability: output of Global/Regional & per-level statistics ;
1123      tested against monitor output (including land & thSIce) on various exp.
1124    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1125    
1126    checkpoint57h_done
1127      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1128      data.diagnostics, data.gchem, data.ptracers) is done.
1129    
1130    o pkg/diagnostics: prepare for Global/Regional statistics.
1131      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1132    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1133      and rename it: DIFFERENT_MULTIPLE
1134    
1135    checkpoint57h_post
1136    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1137    o pkg/diagnostics: change output frequency, now in seconds (instead
1138      of Nb of iterations). This requires to change data.diagnostics.
1139    checkpoint57h_pre
1140    
1141    o in mnc, let the user create the output dir if both mnc_outdir_date
1142      and mnc_outdir_num are false
1143    o add fflags() to pkg/diagnostics which allows one to specify, on a
1144      per-file basis, the file precision [default behavior is unchanged]
1145    o added diagnostics to pkg/kpp, including computation of mixed layer
1146      depth based on a temperature/density criterion
1147    o updated verification/natl_box to test the new pkg/kpp diagnostics
1148    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1149    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1150    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1151      not mnc -- this mistake was found by JMC and is now corrected
1152    
1153    checkpoint57g_post
1154    o add Adams-Bashforth 3rd Order time stepping:
1155      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1156      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1157    checkpoint57g_pre
1158    
1159    o make lambda[Theta,Salt]ClimRelax spatially varying
1160      (default remains spatially uniform constant based on tau)
1161    o added new control variables
1162      * init. uVel, vVel, etanN
1163      * lambda[Theta,Salt]ClimRelax
1164    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1165      (suggested by G. Forget)
1166    
1167    checkpoint57f_post
1168    o add parameter "baseTime" = model base time = time at iteration zero
1169      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1170      account for baseTime shift
1171    o move Coriolis arrays from PARAMS.h to GRID.h
1172    checkpoint57f_pre
1173    
1174    o mnc-ifying the seaice package
1175    o introduced an alternative length scale calculation for use in the limiting
1176      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1177    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1178    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1179      as well as grad(vort3).  Made it compatible with both approximate form
1180      for the cubed sphere and full form of these gradients.  Added flag
1181      useFullLeith to select between approximate and full form.  
1182    o add "d0" in getcon.F to reduce differences between compilers/platforms
1183      update output.txt of exp. fizhi-gridalt-hs
1184    o change port_rand funtion to allow to set the seed.
1185    o fix obscure MNC bug involving conversion between reals and integers
1186      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1187        new version is now more standards-compliant
1188    o adjoint-related modifications
1189      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1190      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1191      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1192    
1193    checkpoint57e_post
1194    o Adding eddy stress controls a la Ferreira et al.
1195    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1196    
1197    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1198      update output.txt of exp. fizhi-gridalt-hs
1199    o add more "Z" dimensions and associated coordinate vars to MNC
1200    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1201    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1202      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1203      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1204      months and years.  Requires pkg/cal.
1205    o diagnostics: add pickup functionality
1206      - off by default for backwards compatibility
1207      - current version only uses MDSIO -- MNC will be added
1208    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1209    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1210    
1211    checkpoint57d_post
1212    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1213    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1214      output from the diagnostics package
1215    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1216    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1217      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1218    o add coordinate variables to the MNC output from the diagnostics package
1219    o change MNC-flags default value: true when useMNC=TRUE
1220    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1221      the ability (off by default) to read the grid information using MNC
1222    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1223    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1224    o do snap-shot diagnostics at the middle of the time-interval (instead of
1225      at the end).
1226    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1227      new test for AIM with thSIce + slab-ocean
1228    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1229    o move state variable diagnostics to the beginning of the time step ;
1230      (note: still needs some work specially for snap-shot diagnostics)
1231      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1232    
1233    checkpoint57c_post
1234    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1235    o generate new output.txt files on faulks with g77 & the new -ieee option
1236    checkpoint57c_pre
1237    
1238    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1239      update output.txt of exp. global_ocean.90x40x15
1240    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1241      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1242    o add saltFlux(+File) forcing capability with periodicExternalForcing
1243    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1244    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1245    o improvements for the MNC output from DIAGNOSTICS:
1246      - correct handling of the unlimitied dimension
1247      - all dims now have associated coordinate variables
1248      - variables located at U, V, and Corner ("Z") points are now written
1249        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1250        *all* data points are output
1251    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1252    o added pkg/seaice/seaice_monitor.F
1253    o mdsio_readfield.F can now read files visible only to master MPI process.
1254    o pkg/seaice: some test code for ice-modified ocean stress
1255    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1256      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1257      spurious negative numbers for precipitation and humidity.  Will cause
1258      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1259    o pkg/ctrl/
1260      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1261        May be enabled via doPackDiag
1262      *  introduce z-scaling of
1263         + gradient (doZscalePack) and
1264         + control (doZscaleUnpack)
1265    o pkg/mdsio/
1266      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1267      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1268    
1269    checkpoint57b_post
1270    o simplify options in diagnostics_fill arguments (remove weird combinations)
1271    o fix MNC coordinate variables so that they now contain per-face index
1272      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1273      general, EXCH2 grids are only aligned to a "local" coordinate system
1274    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1275    o Implement instantaneous output within pkg diagnostics:
1276      setting a negative frequency in data.diagnostics produces
1277     "snap-shot" output (as opposed to time-average if freq > 0)
1278    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1279      NOTE: change ptracer diagnostics name: use 2 characters to work with
1280            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1281    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1282      becomes the coordinate variable for the 'T' dimension
1283    o add CF-style coordinate variables to MNC
1284      - just a first cut:  numbers are meaningless on the cubesphere and
1285        missing along the T axis but otherwise it works!
1286    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1287    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1288    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1289      this is based directly on what the model compute, so that the content of
1290      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1291    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1292    o clean up build options files for SunOS, in particular
1293      - remove -traditional from xmakedepend
1294      - change -xarch=v9 to -xarch=native for f77
1295      - restore use of make (not gmake)
1296      - add CC=gcc if using g77
1297    o changes per discussion of AM, JMC, & EH3 today:
1298      - move redundant "grid" variables out of "state" -- in preparation of
1299        creating proper CF-style coordinate variables and in recognition
1300        that any/all grid variables can be easily copied (eg. w/NCO) from
1301        the grid files into any of the other NetCDF files
1302      - *always* output grid variables with MDSIO (this will eventually be
1303        changed)
1304      - output MNC grid file if useMNC is true
1305    o every instance of _END_MASTER() has been found and replaced with
1306      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1307      preprocessors
1308    o re-arrange diagnostics pkg initialisation:
1309     - allow each package to extend the available diagnostics list
1310     - add some checking and fix small problems (multi-threaded, ...)
1311     - new S/R diagnostics_fill (replace fill_diagnostics):
1312       look through the short list of active diag. (instead of the long list)
1313       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1314    
1315    checkpoint57a_post
1316    o this set of changes restores TAMC compatibility
1317      tested for global_ocean.90x40x15 adjoint on trough
1318      (what a pain)
1319    
1320    checkpoint57a_pre
1321    o some modifs in tools/build_options for sunos
1322    o call ctrl_pack for ctrl at end for optimcycle=0
1323    
1324    checkpoint57
1325    o add horizontal bi-harmonic viscosity for vertical velocity
1326      - new parameter viscA4W (defaults to viscA4)
1327      - affects only non-hydrostatic code
1328      - to be done: no-slip lateral boundary conditions
1329    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1330    o implement Implicit Vertical advection for pTracers
1331    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1332      (implemented also for implicit vertical diffusion & advection)
1333    o OBCS: extend application of tracer open boundary conditions
1334      to a strip beyond the boundary of width Olx/Oly
1335    o add call monitor to TAF set of required calls (flow directives)
1336      and include in natl_box_adjoint
1337    o untangle a few ifdefs related to cost, ctrl, autodiff
1338      untangel a few ALLOW_ECCO_OPTIMIZATION
1339    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1340      (theta2, salt2 in ecco_cost_weights)
1341    
1342    checkpoint56c_post
1343    o OBCS as control variables
1344      - update ctrl_ad_diff.list, obcs_ad_diff.list
1345      - remove balance of obcs controls from default
1346      - fix index bug nobcs in ctrl_init
1347      - fix dummy fields filen in ctrl_pack
1348      - add dummy weights for obcs
1349    o lsopt: comment out fort.94 output
1350    o optim:
1351      - remove unnecessary header files
1352      - adjusted namelists
1353      - add xerbla.F to Makefile
1354    o exf:
1355      - multiple modifications of exf_check_range
1356      - unit change in exf_init_runoff from [m/year] to [m/s]
1357    o mdsio:
1358      - i/o-vector change debugLevel from debLevA to debLevB
1359    
1360    checkpoint56b_post
1361    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1362      is called from DO_THE_MODEL_IO
1363      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1364      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1365      - clean up PTRACERS_WRITE_TIMEAVE a little
1366    o add another verification experiment that tests both the cfc-pkg and
1367      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1368      reactive tendencies treated inline with regular timestepping
1369    o testreport previously did a lousy job of comparing small numbers, so
1370      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1371      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1372      testreport.
1373    o ptracers_monitor: bug fix for MPI
1374    
1375    checkpoint56a_post
1376    o GCHEM: finish reorganizating the package
1377      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1378        (introduces another 3D-array for each passive tracer, but only if
1379        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1380        gchemTendency is not needed because the timestep is done separately)
1381      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1382      - GCHEM is now---more or less cleanly---separate from PTRACERS
1383      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1384        so clear to me how that should be done in a general way.
1385    o CFC: improve formatting of output in CFC_ATMOS
1386    o PTRACERS:
1387      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1388        that ALL experiments with ptracers enable can be checked. This makes
1389        GCHEM_MONITOR obsolete.
1390      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1391        monitorFreq
1392      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1393    o add PTRACERS (PTR0[1-5]) to testreport output
1394    o exf_check_range:
1395      * default changed to .TRUE.
1396      * will check values for niter0 if debLevA, every timestep if debLevB
1397      * STOP in exf_check_range if 'out of range'
1398      * range chosen generous to allow for potential extema
1399      TBD: a version with stricter range
1400           permitted range would be runtime parameters
1401    o GMredi:
1402      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1403      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1404      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1405    o GCHEM:
1406      - move call to GCHEM_FORCING_SEP, so that it is now called before
1407        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1408      - introduced a useGCHEM runtime flag and applied it everywhere.
1409      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1410        this flag is now only visible within GCHEM-pkg routines.
1411      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1412        be replaced by a 3D array that is computed before thermodynamics; for
1413        this, the tracer ID iTracer had to be included into the parameter list
1414        of ptracers_forcing
1415      - set up forward_step to call gchem_forcing, that will replace
1416        gchem_forcing_int in ptracers_forcing
1417      - cleaning up
1418    o small cleaning of exch2: remove files that are also in eesupp/src
1419    
1420    checkpoint56
1421    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1422    o mnc: cleanup "full" files--fixes out-of-memory problem
1423    o ECCO-GODAE
1424      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1425      * fully merged and updated from SIO code
1426        windstress sign change affects
1427        - exf_inscal_[u/v]stress
1428        - sign of xx_tau[u/v] adjustments
1429        - signs in cost_scat
1430      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1431      * natl_box_adjoint updated and compressed
1432      * 2-level checkpoint switch added
1433        (tested in EXP. 1 of natl_box_adjoint)
1434      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1435    o SVD
1436      * first complete, non-hacked version for SVD calculations
1437      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1438        performed via direct access files admtlm_vector.it????
1439        (via ctrl_[un]pack)
1440      * optimcycle is used for ARPACK iteration counter
1441        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1442      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1443        and add linear transforms where necessary
1444      * controls are initial/final SST, SSS (can be extended; need to check
1445        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1446    o mdsio: filename info to both stderr, stdout
1447    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1448      from sign change
1449    
1450    checkpoint55j_post
1451    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1452      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1453    o add consistent build directories and .cvsignore files to verification
1454    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1455    o make all subroutines 30 or less characters in length for certain older
1456      compilers to work (a thorough search only turns up two routines in
1457      pkg/ptracers)
1458    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1459      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1460    
1461    checkpoint55i_post
1462    o change arrays for total vertical diffusivity (2.D if explicit,
1463      3.D if implicit) ; each ptracer uses its own background value.
1464    o added mnc/NetCDF output capability to ocn_compon_interf
1465      - added bits to verification/cpl_aim+ocn so that it can run on
1466        ITRDA and other clusters without the mpirun "-wd" option
1467    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1468      configuration
1469    o give MNC the ability to create additional files rather than
1470      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1471      - the default is just less than 2GB which is a practical limit
1472        on many systems
1473    o Compute the non-local term using either KPP vertical diffusivity (=default)
1474       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1475    
1476    checkpoint55h_post
1477    o add verification test "vermix"
1478    o remove all the *_ioinc flags and replace with the single global
1479      outputTypesInclusive flag
1480    o allow to set a vertical profile of vertical diffusivity for T & S
1481    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1482    o useMNC moved from data.mnc to data.pkg
1483    
1484    checkpoint55g_post
1485    o Renaming carbon AD experiments to comply with testreport conventions
1486    o Updating adjoint of Held-Suarez hs94.1x64x5
1487    o Fixing directives for non-ECCO forward_step, after ECCO directives
1488      have been fixed to avoid recomp. of do_oceanic_phys
1489      Works well for global_ocean.90x40x15,
1490      but recomp. issue remains for carbon
1491    o Updating adjoint output for natl_box_adjoint after
1492      pkg/ecco has been modified (see taga c55d_post)
1493    
1494    checkpoint55f_post
1495    o rename to timeave_init_fixed
1496    
1497    checkpoint55e_post
1498    o some delicate re-shuffle of store directives to avoid one
1499      extra call of do_oceanic_physics
1500      affects ecco_the_main_loop.F, do_oceanic_physics.F
1501      checkpoint_lev1_directives.h
1502    o NB: this may break global_ocean adjoint temporarily,
1503      but it is clear how to fix it. Will do later, need this now.
1504    
1505    checkpoint55d_post
1506    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1507    o ecco_cost_weights is modified to 1x1 runs
1508    o modifs to allow observations to be read in as
1509      single file or yearly files
1510    o enable to read exf forcing fields as either
1511      single file or yearly files (flag useExfYearlyFields)
1512    checkpoint55d_pre
1513    
1514    o switch between 2-level and 3-level checkpointing
1515    o add ability of MNC to write local and "partial" (eg. 2D slices where
1516      the full 3D field is never actually stored) arrays to NetCDF files
1517      with the correct (that is, the complete multi-dimensional) set of
1518      array indicies
1519      - used in mom_vecinv() to write the diagFreq output
1520      - tested (demonstrated) in verification/aim.5l_cs
1521    o further mnc-ification
1522      - add verification/lab_sea to the list with mnc setups
1523      - fix undefined mnc v-names in cd_code
1524      - add kpp to mnc output (both snapshot and timeave)
1525    o non-hydrostatic code
1526      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1527        in calc_gw.F
1528      - defaults to viscAh
1529      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1530        friction or Leith) in non-hydrostatic mode, as long as there is
1531        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1532    o pkg/cost
1533      extend simple cost functions to treat time mean quantities
1534      (T,U,V) via cost_accumulate_state from cost_tile
1535    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1536        be 2 times larger than the minimum size the advection scheme requires.
1537        now get a perfect conservation of salt in advect_cs test-exp (updated)
1538    o GGL90 (Gaspar's TKE mixed layer)
1539      - add horizontal diffusion of TKE, requires exchanges in
1540        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1541        default. In OPA there is no horizontal diffusion of TKE but the
1542        mixing coefficients are computed from a horizontal average of TKE of
1543        6 points or so. I think that diffusion has a little more physical
1544        justification.
1545      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1546        was in vain)
1547      - mask tke-variable in ggl90_init
1548    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1549    o fix biharmonic diffusion on CS-grid.
1550    o more obcs stuff
1551      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1552        for reading boundary values. This routine is called from
1553        obcs_prescribe_read
1554      - updated obcs_check
1555      - changed sponge layer relaxation parameter units for days to seconds
1556      - turned off sponge layer by default
1557      - changed argument list of OBCS_CALC to myTime+deltaTclock
1558      - fixed about 35 bugs in obcs_external_fields_load
1559    
1560    checkpoint55c_post
1561    o obcs stuff
1562      - new runtime flags useOBCSprescribe, useOBCSbalance
1563      - re-arranged obcs_calc
1564      - moved exf_getobcs to obcs_prescibe_read
1565        obcs_prescibe_read is called after ORLANSKI stuff
1566        and independent of it (executable can contain all).
1567      - updated obcs_check
1568      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1569        These may be necessary only if tangential velocities are
1570        prescribed at OB, not sure, needs testing.
1571    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1572      which simplifies the calls and passes the ifc check-bounds test
1573    
1574    checkpoint55b_post
1575    o add a 2D scalar, Z location, exchange_2 routine.
1576    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1577      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1578      affects advect_cs results (for the wrong reason): update output.txt
1579    o use a more standard discretization for biharmonic viscosity ;
1580     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1581      affects results of dome set-up: update output.txt
1582    o fix gad_advection.F (CubedSphere part), back to version 1.23
1583    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1584    
1585    checkpoint55a_post
1586    o merged code to
1587      * prescribe/read time-dependent open boundaries
1588        (works in conjunction with exf, cal)
1589      * sponge layer code for open boundaries
1590      * each boundary N/S/E/W now has its own CPP option
1591        (healthy for the adjoint)
1592    
1593    checkpoint55
1594    o up-to-date adjoint of previous breaks
1595      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1596      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1597      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1598      - carbon: * remove tr1-related adjoint verification
1599                * add ptracer as control variable
1600    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1601      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1602    
1603    checkpoint54f_post
1604    o in verification/carbin/ remove experiment related to
1605      ALLOW_PASSIVE_TRACER (array tr1 etc)
1606      code_ad/ input_ad/ results_ad
1607    
1608    o add two new packages
1609      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1610        + subject to optimization (memory)
1611      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1612        + subject to reordering (many GOTOs in the original code)
1613        + so far opps is called for every (i,j) point, and then operates in
1614          the vertical; one may want to reorder the scheme in order operate in
1615          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1616          fields)
1617    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1618      - all verification tests compile and run with linux_ia32_g77
1619      - defaults are compatible with current input files--nothing
1620        should change if you were not previously using MNC
1621      - MNC output has been added in numerous places (eg. timeave)
1622        but there are still a few writes not yet do-able with MNC
1623        (this is in progress)
1624      - flags now allow for either/or/both use of MDSIO and MNC and
1625        documentation will soon follow
1626      - numerous small formatting cleanups for ProTeX
1627    o add version info (via BUILD_INFO.h) to MNC and stdout
1628    
1629    checkpoint54e_post
1630    o add two new packages
1631      - pp81 (Packanowski and Philander, 1981), Richardson number and
1632        stratification dependent mixing
1633      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1634      - these scheme operate in a similar manner as KPP (without ghat, of
1635        course), however there is only one diffusivity that is used for both
1636        temperature and salinity (and passive tracers)ç
1637    o add offline package
1638    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1639      provided by Stephanie Dutkiewicz
1640    o genmake2: add ability to search for C compilers and cleanup test output
1641      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1642    
1643    checkpoint54d_post
1644    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1645    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1646      leading to additional shift by 5 days each year of integration
1647       (i.e. leading to considerable offset over the years)
1648    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1649    o start with no AB and no initial filtering (staggerTimeStep):
1650      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1651    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1652      (external loading & cpl import/export stay in forward_step.F)
1653    o update coupling interface to work with new staggerTimeStep
1654    o change MDSIO ptracers_pickup.
1655    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1656    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1657    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1658    
1659    checkpoint54c_post
1660    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1661      this affects (truncation error) output.txt of test-exp:
1662       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1663    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1664    o change Qnet to always be the net heat flux, (+upward).
1665      affects (truncation error) output of natl_box exp.: updated
1666    o define the max number of passive tracers in PTRACERS_SIZE.h
1667    o start to test mnc routinely in exp0
1668    o add sea-ice loading (sIceLoad) as a new forcing field.
1669    
1670    checkpoint54b_post
1671    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1672       impressive on Altix and Opteron systems)
1673    o diagnostics can now write NetCDF files through the mnc package
1674    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1675    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1676    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1677      affects (truncation error) output of lab_sea & natl_box exp.: updated
1678    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1679    
1680    checkpoint54a_post
1681    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1682    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1683    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1684    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1685      + internal_wave (shift in writing cg2d_ini_res)
1686    checkpoint54a_pre
1687    
1688    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1689      - modified verification/lab_sea and natl_box_adjoint accordingly
1690    
1691    checkpoint54
1692    checkpoint53g_post
1693    o prepare splitting of thermodynamics: store convect.counter in common block
1694    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1695      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1696    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1697    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1698    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1699    o restore adjointability
1700    
1701    checkpoint53f_post
1702    o modifications that affect AIM experiment results (update output.txt):
1703      - no advection of S at top interface Nr (pkg/generic_advdiff)
1704      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1705    o AIM pkg:
1706      - include stability function into surf.Flux derivative relative to Tsurf
1707      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1708    
1709    checkpoint53e_post
1710    o merged cylindrical coord configuration
1711    o added rotating_tank experiment
1712    checkpoint53e_pre
1713    
1714    checkpoint53d_post
1715    o faulks upgraded: re-generate output.txt that have changed:
1716       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1717    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1718    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1719    o added Sadourny discretization of Coriolis
1720      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1721      - re-enabled use of omega3 (useAbsVorticity)
1722    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1723      vector-invariant equations
1724      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1725    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1726      hopefully without new bugs
1727      - still to do: biharmonic friction for non-hydrostatic w
1728    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1729    o regenerated output for global_ocean_ebm (using -ieee)
1730    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1731      of mom_common/
1732      - simple re-arrangement of instructions within computing loop
1733    checkpoint53d_pre
1734    
1735    checkpoint53c_post
1736    o new version of coupler for AIM+thSIce and Ocean models
1737     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1738     - land: change Evaporation of snow
1739     - aim with thSIce: fix bug in snow-precip.
1740    o changes to calc_gw.F
1741     - bug fix for w^2 term near the bottom boundary
1742     - (hopefully) improve the lateral slip boundary condtions for use with
1743        partial/looped cells
1744      - because the bug fix changes two verification experiments anyway (exp5
1745        and plume on slope), change the lateral boundary condition from half slip
1746        to the value of no_slip_sides
1747    o ebm package wasnt quite up to the parallel task. Fixed that.
1748    o Adjoint of EBM package + verification
1749      * TLM OK
1750      * ADM not sufficient accuracy yet (needs further testing)
1751    
1752    checkpoint53b_post
1753    o Commiting new energy balance model to repository
1754      * package is pkg/ebm
1755      * verif. is verification/global_ocean_ebm
1756      * references are in ebm_driver.F
1757    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1758    C        Global thermohaline circulation. Part I:
1759    C        Sensitivity to atmospheric moisture transport.
1760    C        J. Climate 12(1), 71-82
1761    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1762    C        Global thermohaline circulation. Part II:
1763    C        Sensitivity with interactive transport.
1764    C        J. Climate 12(1), 83-91
1765    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1766    C        Destabilization of the thermohaline circulation
1767    C        by atmospheric eddy transports.
1768    C        J. Climate 7(12), 1870-1882
1769    o Will need long integration testing.
1770    checkpoint53b_pre
1771    
1772    o created pkg/mom_common in preparation for variable viscosity code
1773    o renamed and split ini_mnc_io
1774    o pkg/land: only liquid water can diffuse or run-off
1775    o AIM using land: soil wetness availability account for snow
1776    o added printMapIncludesZeros to EEPARMS namelist
1777    
1778    checkpoint53a_post
1779    o restore TAMC compatiility for exf_constants.h
1780      (no usage of _d in .h)
1781    o Additional storing in KPP in an attempt to fix
1782      TAMC problem with adjoint of KPP code.
1783      (no success...)
1784      Identical code works fine with TAF.
1785    o Fixed verification/natl_box_adjoint experiments.
1786      Initial conditions for Experiments 4 and 5 are now
1787      set to "SEAICE_initialHEFF=0", which is more reasonable,
1788      and hence gives results closer to that of Experiment 2.
1789      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1790    
1791    checkpoint53
1792    o stable checkpoint with up to date adjoint
1793      TLM tests only run for 1st grdchk at the moment. Its unclear if
1794      this is a code problem or a problem with resetting code for g_
1795      variables that is being autogenerated wrong.
1796      Otherwise:
1797       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1798       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1799         are both still in chaos following their security messes.
1800    
1801    checkpoint52n_post
1802    o various build (mostly genmake2) changes including:
1803      - ability to build/run more easily within Cygwin and MacOS X
1804      - more complicated Makefiles with a stronger dependence on Gnu Make
1805    o pkg/seaice modifications
1806      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1807        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1808        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1809      - changed proxy for geostrophic velocity and updated
1810        verification/lab_sea/results/* accordingly
1811      - removed ADI dynamic solver from pkg/seaice
1812      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1813        they caused a segmentation fault under certain circumstances
1814      - removed unused field WATR
1815    o bug fix in exf-package:
1816      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1817         now reflect that.
1818    o small fixes in the cal-package:
1819      - set reference date to first of January for the 'model'-calendar
1820      - failing of cal_CheckDate in cal_FullDate now actually results in a
1821        warning
1822    o small modifications in exf-package to increase flexibility:
1823      - change climtempfreeze from a constant to a runtime parameter that
1824        is specified in data.exf_clim (default = -1.9)
1825      - introduce runtime parameter windstressmax (default = 2.0) that is
1826        specified in data.exf
1827    o fix in pkg/thsice:
1828      - update Evap (Tsf changes) to be consistent with Latent heat flux
1829      - maintain snow precipitation unchanged (even if Tsf >=0).
1830     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1831    
1832    checkpoint52m_post
1833    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1834      this does not change any of the results, because myIter=0 in swfrac always
1835      lead to jwtype=2 (the default anyway), but the call makes little sense
1836      as a default
1837    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1838    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1839      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1840    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1841    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1842    o extending useSingleCpuIO option to work with new exch2 I/O format
1843      - old-style, missing-tile I/O is still accessible by defining CPP
1844        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1845    o monitor package can write to NetCDF files and/or STDOUT
1846    o fix re-definition bug in MNC_GRID_INIT_ALL()
1847    o doc/api_reference added
1848      - a framework for building an API Reference Manual using all
1849        the "protex" comments embedded in the code
1850      - see pkg/generic_advdiff, pkg/mnc for examples
1851    o MNC:
1852      - make myThid the last argument for all subroutines
1853      - new default for the grid files: NO halos
1854      - add useMNC and other run-time flags
1855      - separate per-file-group handling of the unlimited dimension
1856      - early initialization of MNC w/ flags read at the eeboot stage
1857        and lookup tables set in initialize_fixed
1858      - write all MNC output to a freshly-created directory
1859    o thermodynamics sea-ice (thsice) is now tested with testreport.
1860    o test exp. advect_cs: use the standard cs32 grid ; update output.
1861    o Added functionality to grdchk:
1862      pick global i,j,k position (or nearest wet) where to perform check.
1863    
1864    checkpoint52l_post
1865    o new land formulation:
1866      a) use ground enthalpy as prognostic variable to ensure exact
1867         energy conservation.
1868      b) account for water temperature and for latent heat of freezing
1869         in all processes (rain, run-off, ground storage)
1870      c) compute surface and ground temperature implicitly.
1871    o aim_v23 modification for new land model:
1872      a) Treat separately land / ocean / sea-ice surface fluxes
1873         to allow implicit computation of land & sea-ice surface temp.
1874      b) add snow precipitation.
1875    checkpoint52l_pre
1876    
1877    o fix problem (when 1 tile is empty) in min/max monitor.
1878    o fix bug in timeAve (u,vZetatave in common block)
1879    o no restoring terms under ice for pkg/seaice
1880    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1881    o bug fix for pkg/seaice pickups
1882    o change MNC call locations and add coordinate attributes
1883    o mask vorticity at the corner ; affects global_ocean.cs output
1884    o fix ini_curvilinear_grid ; test CS experiments with mpi
1885    o aim.5l_cs: modify sea-ice fraction input file ; update output
1886    o exf: Adding simple range check routine for exf fields after read
1887    
1888    checkpoint52k_post
1889    o removed top-level directory "diags"
1890      - we migrated these functions to pkg/timeave a long time ago
1891    o fixed bug introduced in pkg/monitor
1892    o accuracy ctrlprec = 32 insuffient for gradient checks using
1893      averaged fields (I/O via cost_averages)
1894      -> use ctrl.h in active_file*.F to control I/O precision.
1895    o paramter list of CALL ADTHE_MAIN_LOOP
1896    o added initial do_the_model_io to ecco
1897    o set all ...Freq to zero after cost_final
1898      taveFreq, dumpFreq, pChkptFreq
1899    o MAIN and ECCO differentiability restored
1900    
1901    checkpoint52j_post
1902    o fix nchklev in tamc.h for global_ocean...
1903    o Bringing flow and store directives up-to-date
1904    o Really weird thing!
1905      call do_the_model_io from the_main_loop with parameters
1906      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1907      TAF places a faulty re-call of initialise_varia
1908      after cost_final call which should not be there!
1909    checkpoint52j_pre
1910    
1911    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1912      error messages
1913    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1914    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1915      debug output
1916    o modfied mdsio_writefield.F to handle non-global files under exch2
1917    o update AIM Cubed-Sphere exp (aim.5l_cs):
1918      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1919    o update AIM Equatorial Channel exp:
1920      use standard aim_v23 pkg and change the SST fields to be more realistic.
1921    o globalFile now works with exch2
1922    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1923      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1924    o limit timeave output for hi-res integrations
1925    
1926    checkpoint52i_post
1927    o removed CPP_EEOPTIONS.h from verification/*/code
1928    o updated the tiling for global_ocean_pressure
1929    checkpoint52i_pre
1930    
1931    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1932      the old pkg/aim).
1933    
1934    checkpoint52h_pre
1935    o shortened offending lines in exch2_send_rx?.template
1936    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1937    o genmake2: add build & execute test for NetCDF code
1938    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1939      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1940    o added useSingleCPUIO flag to monitor.F and mon_out.F
1941    o added temporary hack for sea-ice dynamics on the cube:
1942      metric terms are ignored and it is assumed that
1943      there is no sea-ice on cube faces 1, 2, 4, and 5.
1944    
1945    checkpoint52f_post
1946    o added exch2 cube routines to pkg/exch2
1947    o modified hs94.cs-32x32x5 to use it
1948    o added new grid files to hs94.cs-32x32x5
1949    checkpoint52f_pre
1950    
1951    checkpoint52e_post
1952    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1953      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1954    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1955      to work with implicit vertical advection and AB ;
1956    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1957    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1958     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1959    checkpoint52e_pre
1960    
1961    o fix bug in impldiff when Nr=1 or Nr=2.
1962    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1963    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1964    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1965      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1966    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1967    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1968    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1969    
1970    checkpoint52d_post
1971    o re-tiled many expts to allow comparison in multi-processor mode
1972      - updated output accordingly
1973      - changed hs94.128x64x5 to use intial T from file rather than use the
1974        random number generator
1975    o add infrastructure in model routines for fizhi and gridalt packages
1976    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1977    o changes to permit hi-res, cubed-sphere, configuration
1978      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1979      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1980      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1981        of surface winds for the cube
1982      (A verification experiment, based on global_ocean.cs32x15, but with
1983       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1984       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1985       complete with example surface forcing files and matlab scripts to look
1986       at the output and compare it with that of global_ocean.cs32x15.)
1987    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1988       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1989       to conform to the common rule.
1990    o check-in the first version of the coupler + interfaces for multi-components
1991       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1992       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1993       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1994       - ocean and atmos. share the same horizontal grid (no interpolation).
1995       - exchanges between component and coupler is done in forward_step
1996    o new verification experiment, cpl_aim+ocn:
1997       coupled ocean - AIM atmosphere on cs32 grid.
1998    
1999    checkpoint52d_pre
2000    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2001    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2002    
2003    checkpoint52c_post
2004    o Fixing OPTIONS files for use of exf:
2005      - ALLOW_ECCO not needed
2006      - ECCO_CPPOPTIONS.h should not be included from
2007        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2008        as has been the case in the past
2009      - All cal/exf related options are currently set in
2010        single header file. Should remain so until we
2011        agree on a consistent new policy.
2012    o Removed all CPP options for cal package.
2013      cal has no more CPP options.
2014    o modified STOREs in GAD_ADVECTION
2015    o corrected key comp. for passkey
2016    
2017    checkpoint52b_post
2018    o new version: "thsice" of thermodynamic sea-ice pkg:
2019     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2020     - modify fluxes but do not change theta directly;
2021     - light cleaning of bulk_force pkg (still needed with thsice).
2022     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2023       + output_thsice.txt to test thsice & bulk_force pkgs.
2024    o put back grid & coriolis monitor output.
2025    checkpoint52b_pre
2026    
2027    o call "do_the_model_io" at the beginning (=> dump initial state)
2028    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2029    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2030      (need info on NUMBER_OF_PTRACERS)
2031    o missing PTRACERS headers in some routines
2032    o default tamc.h in pkg/autodiff supposed to crash
2033      to ensure proper customization
2034    
2035    checkpoint52a_post
2036    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2037      - moved surfaceTendencyTice from pkg/seaice to main code
2038      - subroutine FREEZE_SURFACE now limits only surface temperature
2039        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2040        => new output.txt for global_ocean.cs32x15 & global_with_exf
2041      - keep the old version of FREEZE for backward compatibility;
2042        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2043      - corresponding modifs for TAF directives
2044    o added surface flux output variables to TIMEAVE_STATVARS
2045    o time-averaged output for pkg/ptracers
2046    o fix problem with ECCO-related divided adjoint
2047      snapshot file was missing some ad-variables,
2048      but no warning issued by TAF
2049    
2050    checkpoint52a_pre
2051    o some bug fixes for #undef REAL4_IS_SLOW
2052    
2053    checkpoint52 = ecco_c52_e35
2054    o after testing adjoints of checkpoint51u_post
2055    
2056    checkpoint51u_post
2057    o this is the post-merge tag of the ecco-branch
2058      (needs another clean checkout and re-testing)
2059    o various natl_box_adjoint configs and results
2060      but no input fields
2061    o obcs adjoint not yet merged!
2062    o adding ECCO global 1x1 and 2x2 degree configs
2063    o updated/extended some store directives for seaice
2064    o pkg/ecco now containes ecco-specific part of cost function
2065    o top level routines the_main_loop, forward_step
2066      supersede those in model/src/
2067      previous input data.cost now in data.ecco
2068      (new namelist ecco_cost_nml)
2069    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2070    
2071    checkpoint51t_post
2072    o this is the pre-merge tag of the ecco-branch
2073    
2074    checkpoint51s_post
2075    o cleanup: removed various obsolete #define-s
2076    o pkg/grdchk
2077      - renamed 'ph-grd 3' to 'grad-res'
2078      - merged from ecco-branch
2079        (remaining bug fixes for obcs gradient checks)
2080      - additional high-precision output for testreport
2081        (grep for 'precision_grdchk_result')
2082    
2083    checkpoint51r_post
2084    o cleaned up or removed CPP_OPTIONS.h files
2085    o updated results for some of the tests to reflect the new
2086      optfiles (-ieee: -O0 instead of -O3)
2087    
2088    checkpoint51q_post
2089    o cd_code:
2090      - moved cd_scheme.F -> cd_code_scheme.F
2091      - separate read_checkpoint from cd_code_ini_vars.F
2092      - separated cd_code part from write_checkpoint
2093      - updated AD_SOURCE, generated .flow
2094      - added CD_CODE_VARS.h to the_main_loop
2095      - Moving cd_code specific store dir.s to pkg/cd_code
2096    o ctrl package totally restructured
2097      - pack/unpack now optional and decoupled from
2098        xx_/adxx_ I/O
2099      - ctrl_pack/unpack cleaned
2100        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2101      - confined inclusion of AD_CONFIG.h to where necessary.
2102    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2103    
2104    checkpoint51p_post
2105    o create initial cd_code package
2106      - WARNING: the initialization of fields within packages
2107        is broken because INI_FIELDS (where READ_CHECKPOINT is
2108        called) is called *before* PACKAGES_INIT_VARIABLES.
2109        This seems to be backwards since
2110        1) its important to initially zero the entire field including
2111           the "halo" region
2112        2) zeroing needs to be done *before* reading pickup info
2113           and the pickup call might or might not happen in any
2114           particular run
2115      - this needs an overhaul for R2
2116    o cleanup verification/*/code/GMREDI_OPTIONS.h
2117    o cleanup testreport
2118    
2119    checkpoint51o_post
2120    o bringing AD-related verif's up to date with genmake2
2121      - carbon/
2122      - global_ocean.90x40x15/
2123      - hs.94.1x64x5/
2124      - (front_relax/ )
2125    o (more) consistent directory structure for AD-related verif.'s
2126    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2127    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2128    o bug fix in find_alpha.F for MDJWF:
2129      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2130        change rho -> rho-rhoConst
2131      - replace call find_rho to find_rhonum
2132    o initialisation of rFlx extended to full array (required by TAF)
2133      and shifted to thermodynamics
2134    o removed PTRACERS.h in ptracers routine
2135    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2136    o Correcting initialisations for fVerU, fVerV.
2137    o helping TAF to recognize dependency on kUp for
2138      fVerU, fVerV
2139    o Replacing delZ by delR in pkg/ctrl/
2140    checkpoint51o_pre
2141    
2142    o undid all of cp51 pending some cleanups and discussion
2143    o added the [#include "AD_CONFIG.h"] statement to all files that need
2144       it for adjoint/tl #defines
2145     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2146     o removed tools/genmake since it no longer works
2147    
2148    checkpoint51n_post
2149    o modifications to make FREEZE flux visible to pkg/kpp
2150      - moved surfaceTendencyTice from pkg/seaice to main code
2151      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2152      - subroutine FREEZE now limits only surface temperature
2153        (this means new output.txt for global_ocean.90x40x15,
2154         global_ocean.cs32x15, and global_with_exf)
2155    o added surface flux output variables to TIMEAVE_STATVARS
2156    
2157    checkpoint51n_pre
2158    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2159    o added [#include "AD_CONFIG.h"] to all files that use the following
2160      defines:
2161      - ALLOW_ADJOINT_RUN
2162      - ALLOW_TANGENTLINEAR_RUN
2163      - ALLOW_ECCO_OPTIMIZATION
2164    
2165    checkpoint51m_post
2166    o incorporating changes to get TAMC/TAF working in genmake2
2167      - added new TAMC/TAF targets to the Makefile
2168      - various cleanups related to package handling
2169      - these changes should have no impact on the forward model
2170    
2171    checkpoint51l_post
2172    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2173     - faster algorithm for cal_addtime.F
2174     - higher precision arithmetic, where needed
2175     - pkg/exf *startdate variables changed from calendar date to
2176       model integration time
2177    
2178    checkpoint51l_pre
2179    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2180    o enable to apply restoring on S & T only in a latitude band.
2181    o update output (external_forcing_surf modif. change truncation errors)
2182       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2183    
2184    checkpoint51k_post
2185    o change default to: useNHMTerms=.FALSE.
2186     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2187       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2188     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2189        exp1, ideal_2D_oce
2190     - change data file of oceanic exp (leave the results unchanged for now)
2191       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2192    o set gravitySign automatically according to the vertical coordinate used
2193      (and change sign: back to "logical" value: +1 when R increases downward)
2194    o added an include barrier to the default CPP_OPTIONS.h and
2195      removed the #include "PACKAGES_CONFIG.h" from it
2196    o fix a bug in mom_fluxform (from chk51j_post)
2197    
2198    checkpoint51j_post
2199    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2200    o adjusted some flow directives (dynamics, thermodynamics)
2201    o added cubed-sphere case to test cost function
2202    o heckpoint_lev?_directives.h now include
2203      pkg-specific directives, whenever those are enabled.
2204    o Moving pkg-specific flow directives to corresponding pkg
2205      Moving pkg-specific differentiation list to corresponding pkg
2206      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2207      ---> conventions are
2208           - pkg_ad.flow
2209           - pkg_ad_diff.list
2210           - pkg_ad_check_lev?_dir.h
2211    
2212    checkpoint51i_post
2213    o merge of the branch-genmake2
2214      - knowingly breaks the older genmake
2215      - automatic generation of all ALLOW_${PKG_NAME} defines
2216      - new testreport supersedes older testscript
2217    o large number of package inclusion and header cleanups
2218    checkpoint51i_pre
2219    
2220    o new output for adjoin of global ocean vector invariant
2221    o fix for checkpoint of thermodynamic seaice and bulk_force
2222    o Steph gchem various cleanups
2223    
2224    checkpoint 51h_pre
2225    o fixed some single quotes
2226    o modify gchem pkg to be more versatile
2227    o modifications to clean up dic pkg
2228    o add pkg/cfc
2229    
2230    checkpoint51g_post
2231    o provide links for ARPACK and ADM*TLM
2232    o start removing verification/vero/
2233    o update AD-related stuff
2234      (in particular some IF-statements in model/src/ routines)
2235    o adding to verification/global_ocean.90x40x15/ adjoint of
2236      vector invariant setup
2237    
2238    checkpoint51f_post
2239    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2240    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2241      of tracer Green's fucntions for ocean inversion project.
2242    
2243    checkpoint51f_pre
2244    o Added on-the-fly spatial interpolation capability
2245        "USE_EXF_INTERPOLATION" to pkg/exf.
2246      - This is a temporary Cartesian-grid hack until
2247        the super-duper ESMF coupler becomes available.
2248      - See verification/global_with_exf/README for usage example.
2249      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2250        flags and modified pkg/seaice accordingly.
2251    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2252        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2253        non-local transport term.
2254    
2255    checkpoint51e_post
2256    o pkg/mom_vecinv:
2257      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2258      - add time-ave diagnostic of vorticity advection.
2259    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2260    o atmospheric geopotential: - include water vapor effect;
2261                                - use p^kappa in p* scaling.
2262    o land pkg: read initial state from files.
2263    o AIM : add stratospheric drag in the upper level
2264    
2265    checkpoint51d_post
2266    o change function ILNBLNK (=> last non-blank char.) to return zero
2267      (instead of the string length) when the string. char is empty
2268    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2269    o modif's to restore TAMC compatibility
2270      - avoid "_d" constructs in PARAMETER declarations
2271      - avoid interrupting lines by comment lines
2272    o Use cluster local disks for purely local I/O
2273      vs. globally visible disks needed for ctrl stuff
2274      (merged from ecco-branch)
2275      - new active_file_loc... and mdsio_..._loc routines
2276      - affected packages: autodiff, ctrl, grdchk, mdsio
2277    
2278    checkpoint51c_post
2279    o introducing integer flag debugLevel
2280      - debLevZero: suppress all output
2281      - debLevA: standard
2282      - debLevB: equivalent to current debugMode=.TRUE.
2283    o introducing pathname variable mdsioLocalDir for mdsio
2284      that can be specified at runtime
2285      (relevant for cluster I/O to local disk)
2286    `
2287    >>>checkpoint51b_post
2288    adjoint of ptracers
2289    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2290    o extended state in checkpoint_lev?, etc.
2291    o alternative ctrl/cost with tr1 or ptracer
2292    o new comlev1_bibj_ptracers
2293    o new ptracers.flow
2294    o made ptracers_forcing same as external_forcing_s
2295    o added verification for adjoint with ptracers
2296      - adm. grdchk fail so far
2297      - tlm. grdchk OK
2298      - checked tapelev/comlev recomputations: OK
2299    <<<checkpoint51b_pre
2300    
2301    checkpoint51a_post
2302    o added code for biogeochemistry package
2303      - new pkgs: dic, gchem
2304      - new subroutine in ptracers
2305    o modify code for biogeo packages
2306      - in model/src and pkg/ptracers
2307    
2308    checkpoint51
2309    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2310      - autodiff, ctrl, exf, grdchk, seaice
2311      kept separate packages
2312      - cost, ecco, obcs
2313    o updating verification/internal_wave, verification/lab_sea
2314      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2315    
2316    checkpoint50i_post
2317    o Preparing next differentiable checkpoint and sync
2318      of MAIN vs. ecco-branch
2319      - 1st step: this one is differentiable
2320      - 2nd step: next(! not this) checkpoint will have updated packages
2321                  from ecco-branch)
2322    
2323    checkpoint50h_post
2324    o new package "land": provide surface BC for AIM.
2325    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2326    o AIM: use true log-P extrapolation for near surface temp (= as in
2327        F.Molteni paper) ; update aim.5l_cs output.
2328    o New variable in PARM03 for more flexible pickups
2329    o somewhat cleaned package initialisation sequence for
2330      ctrl/ cost/ ecco/ in packages_... routines
2331    
2332    checkpoint50g_post
2333    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2334      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2335      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2336        made the default because of faster convergence than ADI
2337    
2338    checkpoint50f_post
2339    o exf totally restructured
2340      - replaced all exf_set_ routines by one generic exf_set_gen.F
2341        and made sure it's still differentiable
2342      - split exf_getffields.F into new exf_bulkformulae.F
2343      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2344      - updated adjoint/makefile and relevant verif. accordingly
2345    
2346    checkpoint50f_pre
2347     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2348          + change Evap over land. (update aim.5l_cs output)
2349     o added missing .cvsignores and made uniform across expts
2350     o changed configuration of tidal_basin_2d expt
2351     o added pkg/debug functions for tracing code in fatal crashes
2352     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2353     o new fn in pkg/monitor to stop model if solution grows too big
2354     o removed lots of single quotes from comments
2355    
2356    checkpoint50e_post
2357    o make KPP work with PTRACERS
2358     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2359       nearly a copy of kpp_transport_s
2360     - there is no analogue to SurfaceTendencyS, so I have to use
2361       gPtr(of the surface layer) instead
2362    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2363    checkpoint50e_pre
2364    
2365    checkpoint50d_post
2366    o change kpp output from multiple-record state files to single-record state
2367      files analogous to write_state.F
2368    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2369      analogous to the cg2d-related output.
2370    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2371      so that writing to internal file fn (with length 512) fails.
2372    checkpoint50d_pre
2373    
2374    checkpoint50c_post
2375    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2376    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2377    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2378    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2379    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2380    
2381    checkpoint50c_pre
2382    Merging from release1_p13:
2383    o bug fix for pkg/seaice dynamic solver
2384    o Added SEAICE_initialHEFF to pkg/seaice
2385    
2386    checkpoint50b_post
2387    o store u*,v* in gU,V instead of in guNm1,gvNm1
2388    o in order to put the momForcing out of the Adams-Bashforth:
2389      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2390      to timestep.F
2391    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2392    o re-generate output for highly sensitive test-exp:
2393       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2394    
2395    checkpoint50b_pre
2396    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2397    o corrected CPP option mismatch in exf_Bulk... functions for case
2398      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2399    
2400    checkpoint50a_post
2401    o Bug fix for merging between c50 and KPP.
2402      ikey was passed from thermodynamics to kpp_calc via
2403      common block rather than being recomputed in kpp_calc,
2404      in contradiction with new key itdkey.
2405      New key ikppkey created, and tamc.h headers updated.
2406    
2407    checkpoint50
2408    - 2nd step of merge with ecco-branch:
2409      merge changes in ecco-branch back into main trunk
2410    - bug fix in find_alpha
2411    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2412    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2413    - merged some sliced AD support routines
2414    
2415    checkpoint49
2416    merged from ecco-branch:
2417    o exf:
2418      - Enable initialisation of forcing fields to constant
2419        (runtime) values.
2420      - in exf_getffields.F
2421        Reduce i-/j-loop to interior domain, discarding overlaps.
2422        That also fixes wrong TAF-key computations for key_1, key_2
2423        with bulf formulae.
2424      - exf_init.F modify #ifdef for exf_init_evap
2425      - exf_getffieldrec.F, ctrl_getrec.F
2426        The following INT-usages are not safe:
2427          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2428          fldcount = int(fldsecs/fldperiod) + 1
2429        and were modified.
2430    o autodiff: checkpoint_lev...
2431      - updated storing for bulk formulae (some arrays were missing)
2432      - added state for seaice package
2433      - synchronized with main branch
2434    o DIVA:
2435      Modif.s in
2436      - the_main_loop.F
2437      - the_model_main.F
2438      and added cost_final_restore.F cost_final_store.F
2439      o With these changes, it is possible to fully separate
2440        the first forward run to compute the cost function (mdthe_main_loop)
2441        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2442        into separate model executions.
2443        This enables better tuning of DIVA to given queue sizes.
2444      o Loss of cost function value in consecutive DIVA runs is
2445        fixed by storing to 'costfinal' file.
2446      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2447        beginning/end of adjoint integration is accounted for.
2448      The current changes apply to TAF-1.4.26.
2449      TAF has one remaining bug, requiring one manual change
2450      (see MITgcm manual).
2451    o cal: synchronized between MAIN and ecco-branch
2452    
2453    checkpoint48i_post
2454    o Changes to restore differentiability of code w.r.t. previous tag
2455      (mostly adding new routines to make list and replacing
2456      pressure by totPhiHyd).
2457    o Updated and merged grdchk package
2458      - has both ADM and TLM checks
2459      - works for single- and multi-proc.
2460      - output cleaned
2461      - worked successfully for parallel DIVA
2462    o genmake:
2463      - Adding -platform=SP4
2464      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2465    o Modif. for DIVA:
2466      ctrl_unpack should not be called in intermediate DIVA interval.
2467      (similar thing would apply for active files such as
2468      tbar, sbar, psbar, which should not be reinitialised;
2469      only relevant for ecco-branch)
2470    
2471    checkpoint48h_post
2472    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2473    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2474    o Added SEAICE_initialHEFF to pkg/seaice
2475    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2476    
2477    checkpoint48g_post
2478    --- EOS:
2479    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2480      store total Potential in totPhyHyd for diagnostics & EOS.
2481    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2482    --- Pressure/geopotential gradient:
2483    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2484    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2485      ( changes results of global_ocean_pressure )
2486    o NLFS + z-coord.: add eta*Rho' contribution.
2487    o accurate phiHyd when using interface-W at the middle between 2 centers
2488     ( changes results of ideal_2D_oce )
2489    o includes r* 2nd term in potential gradient.
2490    
2491    checkpoint48f_post
2492    Merging from release1_p12:
2493    o Modifications for using pkg/exf with pkg/seaice
2494      - improved description of the various forcing configurations
2495      - added basic radiation bulk formulae to pkg/exf
2496      - units/sign fix for evap computation in exf_getffields.F
2497      - updated verification/global_with_exf/results/output.txt
2498    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2499      (SBO) core products, including oceanic mass, center-of-mass,
2500      angular, and bottom pressure (see pkg/sbo/README.sbo).
2501    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2502      to avoid negative values in shallow regions.
2503      - updated verification/natl_box/results/output.txt
2504      - updated verification/lab_sea/results/output.txt
2505    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2506    o Added useSingleCpuIO option (see PARAMS.h).
2507    o Updated useSingleCpuIO option in mdsio_writefield.F to
2508      work with multi-field files, e.g., for single-file pickup.
2509    o pkg/seaice:
2510      - bug fix in growth.F: QNET for no shortwave case
2511      - added HeffFile for specifying initial sea-ice thickness
2512      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2513    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2514      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2515    o pkg/seaice:
2516      - adjoint-friendly modifications
2517      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2518    
2519    checkpoint48e_post
2520    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2521    o dynamics: change definition of computational domain & adapt mom_fluxform
2522      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2523    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2524        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2525        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2526        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2527        inverted_barometer solid-body.cs-32x32x1
2528      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2529    
2530    checkpoint48d_post
2531    o in preparation for r*:
2532     a) use pre-computed gradient of hydrostatic potential:
2533        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2534     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2535        => affects results of glob_oce_pressure (different truncation error)  
2536      update output.txt of ideal_2D_oce & global_ocean_pressure
2537    
2538    checkpoint48d_pre
2539    o in preparation for r*:
2540      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2541      pass the 2 comp. of the grad. as arguments to momentum S/R.
2542      but for the moment, only used if it does not change the results.
2543    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2544    
2545    checkpoint48c_post
2546    Modifications in treatment of initial flux forcing controls
2547    to avoid extra storing of flux fields.
2548    
2549    checkpoint48c_pre
2550    o Added tidal_basin_2d experiment (currently 1D!)
2551    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2552    
2553    checkpoint48b_post
2554    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2555     (modification to pressure gradient not yet implemented)
2556    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2557      (for U & V) that are used for vertical advection of momentum.
2558    
2559    checkpoint48a_post
2560    o In preparation for r*, use temp. array to compute vertical transport
2561       in flux-form momentum pkg. => change results of few test-exp.
2562      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2563                        lab_sea, natl_box & plume_on_slope
2564    
2565    checkpoint48
2566    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2567    
2568    checkpoint47j_post
2569    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2570    o moved adexch from forward_step to addummy_in_stepping
2571    o added exch in ctrl_map_...
2572    o aveFreq.=0. at end of cost_final to avoid overwrite in
2573      reverse checkpointing loop
2574    o Yet more changes in gmredi:
2575      * adgmredi_calc_tensor
2576        avoiding all recomputation of gmredi_slope_limit
2577      * adgmredi_x/y/rtransport
2578        added flag for excessive storing to avoid recomp. of
2579        u/v/rtans, dTdx/y/z
2580        -> this is not really necessary and very memory-consuming
2581      * adgmredi_slope_psi:
2582        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2583      * gmredi_slope_limit
2584        re-activated full calculation of taperfct for case 'ac02'
2585    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2586    
2587    checkpoint47i_post
2588    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2589    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2590      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2591    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2592    o gmredi: fix few bugs.
2593    
2594    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2595    This will be a good checkpoint to plug into the ecco-branch.
2596    o few modif.'s to get latest version adjointed
2597      (mainly kick out code in ini_linear_phisurf)
2598    o modif's to run adjoint with exactConserv
2599    o case GM_BOLUS_ADVEC should be cleaned
2600      S/R gmredi_slope_psi should be cleaned
2601    o verification/carbon now has exactConserv=.TRUE.
2602    
2603    checkpoint47g_post
2604    o time-average AIM output: becomes independent from statvars time-average
2605      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2606    o After TAF bug fix:
2607      Tested adjoint of gmredi package.
2608      Tests were done with checkpoint47 rather than with latest
2609      checkpoint47f_post since the latter is broken for the adjoint
2610      verification/carbon/ contains both ADM and TLM gradient checks.
2611    Here they are, before they get changed/lost/stolen.
2612    Mostly modif.'s to fix numerical sensitivities.
2613    Gradient checks OK for
2614    - GM_taper_scheme:
2615      * clipping
2616      * ac02
2617      * linear
2618      * glw91
2619      * dm95
2620      * ldd97
2621    - GMREDI_OPTIONS:
2622      * GM_VISBECK_VARIABLE_K
2623      * GM_NON_UNITY_DIAGONAL
2624      * GM_EXTRA_DIAGONAL
2625      * GM_BOLUS_ADVEC
2626    in conjunction with data.gmredi parameters to be checked in
2627    in a few minutes under verification/carbon/code/
2628    
2629    checkpoint47f_post
2630    Merging from release1_p10:
2631    o modifications for using pkg/exf with pkg/seaice
2632      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2633        and SEAICE_EXTERNAL_FLUXES
2634      - pkg/exf CPP options EXF_READ_EVAP and
2635        EXF_NO_BULK_COMPUTATIONS
2636      - usage examples are Experiments 8 and 9 in
2637        verification/lab_sea/README
2638      - verification/lab_sea default experiment now uses
2639        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2640    
2641    checkpoint47e_post
2642    o created a tag prior to creating a branch
2643    
2644    checkpoint47d_post
2645    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2646      at the bottom boundary had an erroneous half slip boundary condition
2647    o added bottom drag and no slip boundary condition capabilities to
2648      oceanic pressure coordinates code
2649    o added new verification experiment global_ocean_pressure, this experiment is
2650      also described in the tutorial section of the manual
2651    checkpoint47d_pre
2652    
2653    checkpoint47c_post
2654    o Added a verification experiment for a global cubed-sphere ocean run
2655      -  verification/global_ocean.cubed32x32x30
2656      -  uses pkg/therm_seaice and pkg/bulk_forcing
2657    
2658    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2659    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2660      when using P-coordinate; only implemented for atmospheric config.
2661    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2662      NOTES: requires option NONLIN_FRSURF to be "#define".
2663    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2664    
2665    checkpoint47b_post
2666    Merging from release1_p9:
2667    o pkg/seaice
2668      - removed GOTO's and added taf directives
2669      - double precision constants to reduce the g77 (Linux)
2670        to F77 (SGI) differences reported in release1_p8
2671    o tools/genmake
2672      - added SGI options
2673    o verification/testscript
2674      - updated to that of checkpoint47a_post
2675    o verification/global_ocean.90x40x15/input/eedata
2676      - modified for SGI f77 compatibility
2677    o verification/lab_sea
2678      - added description of sea-ice model
2679      - added missing matlab routines
2680      - added test of thermodynamics parallelization
2681    
2682    checkpoint47a_post
2683    o new pkg: aim_v23
2684     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2685       for now, keep the same surface forcing as before.
2686     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2687     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2688     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2689    o add diagnostic of surface correction term in monitor output
2690    
2691    o bulk_force and therm_seaice
2692    - Two packages:  bulk_force (Bulk forcing)
2693      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2694    - Earlier integration from Stephaine Dutkiewicz
2695      and Patrick Heimbach.
2696    - Two ifdef statements for compile time,
2697       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2698    
2699    checkpoint47
2700    differentiable version of checkpoint46n_post
2701    o bug fix in quasihydrostaticterms
2702    o * "clean" adjoint code (in terms of extensive recomputations)
2703        can now be obtained for all GMREDI options (i.e. for
2704        - GM_VISBECK_VARIABLE_K
2705        - GM_NON_UNITY_DIAGONAL
2706        - GM_EXTRA_DIAGONAL
2707        - GM_BOLUS_ADVEC )
2708      * However, wrong gradient check problem remains unsolved.
2709      * New CPP options have been introduced for different
2710        tapering schemes
2711    o external_fields_load now part of differentiation list
2712    o pressure needs multiple storing;
2713      would be nice to have store_pressure at beginning or
2714      end of forward_step, e.g. by having phiHyd global (5-dim.)
2715      (NB: pressure is needed for certain cases in find_rho,
2716      which is also invoked through convective_adjustment).
2717    o recomputations in find_rho for cases
2718     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2719    o #define ATMOSPHERIC_LOADING should be differentiable
2720    o ini_forcing shifted to begining of initialise_varia
2721    o Incorporating QNVS line search routines into MITgcm
2722      (this is separate code, and therefore not under pkg)
2723      lsopt/, optim/
2724    o Updated verification/carbon/
2725      - #define GM_VISBECK_VARIABLE_K
2726      - GM_taper_scheme    = 'ldd97'    
2727    
2728    checkpoint46n_post
2729    Merging from release1_p8:
2730    o verification/natl_box:
2731      updating new external_fields_load routine
2732    o New package: pkg/seaice
2733      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2734      The sea-ice code is based on Hibler (1979-1980).
2735      Two sea-ice dynamic solvers, ADI and LSR, are included.
2736      In addition to computing prognostic sea-ice variables and diagnosing
2737      the forcing/external data fields that drive the ocean model,
2738      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2739      The implied surface heat flux is then stored in variable
2740      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2741      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2742      non-local transport term.  Because this call precedes model
2743      thermodynamics, temperature under sea-ice may not be "exactly" at
2744      the freezing point by the time theta is dumped or time-averaged.
2745      N.B.: fairly large differences in accuracy occur across
2746            different platforms/compilers; comparison between
2747            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2748            generated output gives:
2749       T           S           U           V
2750      C D M    c        m  s        m  s        m  s        m  s
2751      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2752      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2753      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2754    
2755      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2756    o GAD:
2757      - generated new common blocks to account for call of
2758        same gad routines with differing traceridentities
2759        (needed to modify tracerIdentity indices in GAD.h)
2760      - generated separate common blocks for case useCubedSphereExchange
2761        (Department of Futurology)
2762      - parameter lists to gmredi_?transport: added tracerIdentity
2763      - added new key indices to tamc.h
2764    o external_fields_load:
2765      - added this routine to TAF list
2766      - needed to make some common blocks global and additional storing
2767        along the same lines as exf package (checkpoint_lev?_directives.h)
2768    o exf:
2769      updated external forcing package
2770      - bug fixes carried over from ecco-branch
2771        (missing OBCS_OPTIONS.h in two routines)
2772      - enable easy to use "no forcing".
2773      - added exf I/O for atmospheric loading
2774      - added exf I/O for runoff data
2775      - transfered scaling between exf <-> MITgcm to exf namelist
2776    o Adding new verification experiment global_with_exf.
2777      This verification experiment is almost identical to the
2778      global_ocean.90x40x15 experiment, except that it uses
2779      the exf (and cal) package instead of the
2780      external_fields_load routine (cf README file).
2781    
2782    checkpoint46m_post
2783    o modified testscript to return -- when there are no lines of "%MON" output
2784    o added new flag "quasiHydrostatic" for QH mode
2785      and new routine quasihydrostaticterms()
2786    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2787      New routine: mom_u_coriolis_nh()
2788    o fixed sign of non-hydrostatic metric terms in u and v equations.
2789      Depend on correct sign of gravitySign.
2790    o added work.pc* to .cvsignore in aim directories using ifc
2791    o introduced flag for controllin non-hydrostatic metric terms
2792    o removed gravitySign from PARM04
2793    o switched to g77/ifc from pgf77 in aim experiments
2794    
2795    checkpoint46l_post
2796    o made convective adjustment work with pressure coordinates:
2797     - changed the direction of k-loop in convective_adjustment.F for the
2798       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2799     - adjusted the reference pressure k-index in convective_adjustment.F
2800     - adjusted the convection condition in convect.F (in analogy to
2801       calc_ivdc.F)
2802     - convective_adjustment no longer computes anything on the halos
2803     - removed the warnings about negative salinity from find_rho.F and
2804       find_alpha.F; instead the new routine look_for_neg_salinity, called
2805       at the beginning of find_rho, find_alpha, and find_beta, does a
2806       check of the entire slice, if CPP-option
2807       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2808    checkpoint46l_pre
2809    
2810    checkpoint46k_post
2811    o fixed the verification/global_ocean.90x40x15 experiment:
2812     - new bathymetry (the world according to A., JMC, and M.)
2813     - new initial fields and forcing fields (*.bin files)
2814     - new POLY3.COEFFS (for the next release one should switch to a full
2815       equation of state: JMD95P or MDJWF)
2816     - fixed several errors and redundancies in the data file
2817     - experiment uses looped cells
2818     - added matlab directory with diagnostic scripts for plotting of output
2819    
2820    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2821     - read AIM physics parameters from a file (data.aimphys)
2822     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2823    
2824    checkpoint46j_post
2825    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2826    o move wVel computation at the end of the time step, in S/R integr_continuity
2827    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2828    o update timeave pkg for wVel diagnostic.
2829    checkpoint46j_pre
2830    
2831    checkpoint46i_post
2832    o Clean up AIM package (and keep the results unchanged):
2833      include CPP_OPTION and use IMPLICT NONE in all routines ;
2834      declare all the variables _RL ; use _d 0 for all numerical constants.
2835      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2836    
2837    checkpoint46h_post
2838    o cleaned up the use of rhoNil and rhoConst.
2839      - rhoNil should only appear in the LINEAR equation of state, everywhere
2840        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2841        and the dynamical equations are all divided by rhoConst
2842    o introduced new parameter rhoConstFresh, a reference density of fresh
2843      water, to remove the fresh water flux's dependence on rhoNil. The default
2844      value is 999.8 kg/m^3
2845    o cleanup up external_forcing.F and external_forcing_surf.F
2846      - can now be used by both OCEANIC and OCEANICP
2847    checkpoint46h_pre
2848    
2849     Added code to convert surface volume flux (fresh water) into
2850     a mass flux when using P coordinates in the ocean (OCEANICP).
2851     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2852    
2853    checkpoint46g_post
2854    o Include a new diagnostic variable phiHydLow for the ocean model
2855      - in z-coordinates, it is the bottom pressure anomaly
2856      - in p-coordinates, it is the sea surface elevation
2857      - in both cases, these variable have global drift, reflecting the mass
2858        drift in z-coordinates and the volume drift in p-coordinates
2859      - included time averaging for phiHydLow, be aware of the drift!
2860    o depth-dependent computation of Bo_surf for pressure coordinates
2861      in the ocean (buoyancyRelation='OCEANICP')
2862      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2863        Theta, Salinity, and Pressure in the parameter list. This routine is
2864        presently contained in find_rho.F. This routine does not give the
2865        correct density for 'POLY3', which would be a z-dependent reference
2866        density.
2867    o cleaned up find_rho
2868      - removed obsolete 'eqn' from the parameter list.
2869    o added two new verification experiments: gop and goz
2870      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2871    checkpoint46g_pre
2872    
2873    checkpoint46f_post
2874    o Enable tangent linear (forward mode) gradient checks:
2875      - extended active file handling to g_... files
2876      - added TANGENT_SIMULATION to theSimulationMode
2877      - extended grdchk package accordingly
2878    o added tangent linear setup in verification/carbon/code_ftl
2879    o added adjoint setup in verification/front_relax/code_ad
2880    
2881    checkpoint46e_post
2882    o Added new equation of state -> MDJWF
2883      - EOS of McDougall et al., 2002, JAOT, submitted
2884      - caveat: the equation of state is only valid for a smaller (more
2885        realistic?) range of values than JMD95P/Z and UNESCO
2886      - added masks to the calculation of pressure in store_pressure
2887      - added more check values for density in check_eos (ini_eos.F), some of
2888        the old check values are out of the range of the MDJWF-eos, so don't
2889        expect perfect matches for those
2890    checkpoint46e_pre
2891    
2892    checkpoint46d_post
2893    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2894      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2895      case of pressure coordinates. eosType='JMD95Z' in
2896      combination with buoyancyRelation='OCEANICP' now causes an error.
2897    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2898      in find_alpha/beta.
2899    checkpoint46d_pre
2900    
2901    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2902      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2903    
2904    checkpoint46c_post
2905    o Changes necessary for ocean in p-coordinates
2906     -  Added new buoyancy relation = 'OCEANICP'
2907     -  Added new parameters = gravitySign (this used to be contained inside
2908        the factor dRdZ which I added when we first switched to R coordinates).
2909     X GM/Redi is not compatible (yet)
2910     X bottom drag and no-slip need to be debugged.
2911    checkpoint46c_pre
2912    
2913    checkpoint46b_post
2914    o Added new equation of state -> JMD95Z and JMD95P
2915      - EOS of Jackett and McDougall, 1995, JAOT
2916      - moved all EOS parameters into EOS.h
2917      - new routines ini_eos.F, store_pressure.F
2918    o Added UNESCO EOS, but not recommended because it requires
2919      in-situ temperature (see JMD95)
2920    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2921      unesco.f to be used with POLY3
2922    checkpoint46b_pre
2923    
2924    checkpoint46a_post
2925    o Added (atmospheric) pressure loading
2926      - new field in FFIELDS.h, etc...
2927      - new cpp flag ATMOSPHERIC_LOADING
2928    o Changed hFacC to _hFacC in calc_phi_hyd.F
2929    o Added SHORTWAVE_HEATING to some files for consistency
2930    checkpoint46a_pre
2931    
2932    checkpoint46
2933    further merges from release1_p5
2934    o new ctrl package
2935      - adopted from ECCO environment to enable optimization
2936      - added Eliassen Palm fluxes to controls
2937    o added Eliassen Palm flux controls to gradient check package
2938    o cost package
2939      - Compatible with new ctrl package
2940      - added Eliassen Palm cost hooks
2941      - modif's of existing cost functions
2942    o Adjoint-related bug fixes in kpp:
2943      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2944      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2945    o autodiff package
2946      - flow directives:
2947        + new for S/R do_the_model_io
2948        + enhanced for S/R checkpoint
2949        + new gmredi.flow
2950      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2951        disable adcommon.h/g_common.h by default.
2952      - fixed problem for adjoint of global_max
2953    o modified verification/carbon/
2954    o New setup for adjoint of global_ocean
2955    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2956    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2957    o incorporated hooks for sponge layer code (external_forcing.F)
2958    
2959    checkpoint45d_post
2960    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2961    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2962      (affects plume_on_slope "cg2d" output)
2963    o add new parameter deltaTfreesurf for free-surface time stepping
2964    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2965    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2966    o change phiMin in exp1 (to agree with documentation)
2967    o add new flags:
2968     - T,S forcing inside/outside Adams-Bashforth
2969     - turn off temp,salt advection and/or forcing
2970     - for each tracer, define internal flag for multiDimAdvection & A-B
2971    o monitor: change definition of KE to check conservation of Energy
2972    
2973    checkpoint45c_post
2974    o Removed f90 comments ("!")
2975    o Modified initialisations to enable exf package for MITgcm
2976      (without invoking ECCO_PACKAGE).
2977    o modifications to gradient check package (Martin Losch)
2978      - enable centered differences
2979      - modified format of standard output
2980    
2981    checkpoint45b_post
2982    o cleaned exchange calls in cg2d
2983    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2984    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2985      to configure barotropic setup (Martin Losch)
2986    o moved some initialisations within bi,bj loop in dynamics
2987      (TAF flow dependency)
2988    o in initialise_varia, moved call packages_init_variables
2989      before convective_adjustment_init
2990      (corresponding adjustment of TAF tape initialisation).
2991    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2992    
2993    checkpoint45a_post
2994    o compute Rho over the whole domain (extend iMin,jMin indices)
2995    o specific exchange for X-slice domain (case Ny=1)
2996    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2997    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2998    
2999    checkpoint44h_post = checkpoint45
3000    o Fix to restore differentiability:
3001      place at which packages_init_variables is called in
3002      initialise_varia is crucial for reverse control flow.
3003    o modifications in GMRedi to enable stable adjoint
3004      (corresponding modif's in thermodynamics, dynamics)
3005    o added missing hook for sponge layer code in external_forcing
3006    o modified test cost functions
3007    o storing in gad_advection (plus removal of write(0,*)!
3008    o missing headers TR1.h added in convective_adjustment routines
3009    o errorMessageUnit set non-equal zero in eeboot
3010      (conflict on some platforms, e.g. IBM SP3)
3011    o modified carbon verif.
3012    
3013    checkpoint44h_pre
3014    o vertical grid option: allow to put the Interface at the middle between
3015      2 cell-centers ; replace delZ in pkg/kpp by drF.
3016    o GM Advective form: Tracers are advected using the residual transport (=
3017      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3018    
3019    checkpoint44g_post
3020    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3021      results) ; ifdef missing in thermodynamics.F
3022    
3023    checkpoint44f_pre,checkpoint44f_post
3024    o added PTRACERS package
3025      This allows an arbitrary number of passive tracers to be integrated
3026      forward simultaneously with the dynamicaly model.
3027      + Implemented so far:
3028        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3029        - I/O and checkpointing
3030        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3031      + Not implemented so far:
3032        - KPP
3033        - OBCS
3034      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3035        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3036        line in data.pkg.
3037      + This package is disabled by default since it increases storage.
3038    
3039    
3040    o testscript: added -cleanup option
3041    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3042                 b) enable to filter 2D fields.
3043    
3044    checkpoint44e_pre,post
3045    o re-wrote convective adjustment to use pre-calculated weights
3046      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3047      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3048      Original calls to convect() still in place.
3049    
3050    chkpt44d_pre,post
3051    o added missing EXCLUDE_MONITOR flags
3052    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3053      (incompatible typ in MIN/MAX expressions caused problems
3054      on IBM SP3)
3055    o in genmake added variable MAKEDEPEND
3056      plus resetting for case SunOS
3057    o added timer_stats.c routine for IBM SP3
3058    o removed variables in dynamics
3059    !!! I forgot to create tag chkpt44d_pre !!!
3060    !!! But chkpt44d_pre = chkpt44c_post    !!!
3061    
3062    o real fresh water flux implemented with non-linear free-surface.
3063    
3064    chkpt44c_pre,post
3065    o few fix (mask in shap_s2, EmPmR in external_field_load,
3066      USE_NATURAL_BCS in solve_for_P);
3067    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3068    
3069    checkpoint44b_pre/_post
3070    o merge of relevant stuff from the ecco-branch:
3071      - genmake: removed $S64 overwrite for case SunOS
3072      - pkg/exf: update and corrections for field swapping and obcs
3073      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3074                  harmonized between ECCO and MITgcm
3075      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3076                      updated checkpointing_lev... lists for obcs
3077      - model/src: minor changes in forward_step, plot_field
3078                   added directive for divided adjoint in the_main_loop
3079      - pkg/mdsio: added mdsio_gl_slice
3080    
3081    o check parameters & config (chkpt44a_pre,post)
3082    o OBC and NonLin_FrSurf.
3083    
3084    checkpoint44
3085    o fix bug in mom_vi_del2uv
3086    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3087    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3088    o update AIM experiments (NCEP input files)
3089    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3090    o added some stuff for AD
3091    
3092    checkpoint43
3093    o added two new advection tests
3094    o added global 4x4 degree ocean test
3095    o added test of H&S94 with free surface on cube
3096    o some final mods for gradient check, adjoint,...
3097    
3098    checkpoint42
3099      Fixed AD-related problems:
3100    o Store directives up-to-date with re-arranged Adams-Bashforth
3101      (mainly thermodynamics.F)
3102    o New store directives for multi-dim. advection schemes
3103      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3104      * new common block and key passkey
3105      (mainly gad_advection.F)
3106    o Modified store directives for split of dynamics/thermodynamics
3107      for the case ALLOW_KPP
3108    o Cleaned argument list for timestep_tracer.F
3109    
3110    checkpoint41
3111    o re-formatted/added comments in prologues of key subroutines
3112      to work with protex
3113    
3114    checkpoint40
3115    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3116    o added FLT (floats) package from Arne along with demo. experiment
3117    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3118      implementation of forward-in-time forcing terms
3119    o more mods for non-linear free-surface including new variable
3120    o modified multi-dim method to work on cube
3121    o bug fix in KPP (from DM)
3122    
3123    checkpoint40pre9
3124    o added DST advection schemes
3125    o fix MPI bug on SGI's
3126    o modifications for non-linear free-surface
3127    o fixed conditionals for fixed flow/passive tracer only mode
3128    o added tension/strain form of stress tensor
3129    o changes to commenting of arguments for TAF/TAMC
3130    o added/updated many matlab scripts
3131    o added multi-dimensional advection method for tracers
3132      
3133    checkpoint40pre8
3134    o new package rw/
3135      Added method for dumping intermediate local arrays:
3136      mdsio_writetile - same as mdsio_writefield except works from inside
3137                        bi,bj loop
3138      mdsio_writelocal - same as mdsio_writetile except works for local
3139                         arrays
3140      write_local_r? - higher-level wrapper for mdsio_writelocal
3141      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3142      Example given at end of mom_vecinv.F that dumps some local arrays.
3143    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3144      control flux-form versus vector invariant code.
3145      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3146      or genmake -DISABLE ...
3147    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3148      (additional storing is now needed for case vecinv;
3149      currently nothing implemented to switch this storing off
3150      in case fluxform is used since no CPP flag available).
3151    
3152    checkpoint40pre7
3153    o bug fix in dynamics.F
3154      calc_viscosity called before k=1,Nr loop.
3155    o added some #ifdef's ALLOW_PASSIVE_TRACER
3156    o cleaned initialisations in ctrl_map_ini
3157      related to TAF
3158    
3159    checkpoint40pre6
3160    o split dynamics into thermodynamics & dynamics
3161    o corresponding split of calc_diffusivity into
3162      calc_diffusivity, calc_viscosity
3163      (kpp_calc_diff, kpp_calc_visc).
3164    o Added diffkr, kapgm to control variables
3165    o bug fix in gmredi_slope_limit for ldd97
3166    
3167    checkpoint40pre5
3168    o proper initialization of Adams-Bashforth time stepping
3169      + uses forward step for very first step of model (iter=0)
3170    o re-generated *all* output since almost all output is modified by this
3171      change (sorry but we've been putting this one off for about 2 years)
3172      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3173        *not* regenerated since they are already out of date and I don't
3174        want to create the impression that they are suddenly working.
3175    o removed KAP stuff for DEC's
3176    o modified/added many .cvsignore files in */code and */input
3177    o added new expt "solid-body.cs-32x32x1"
3178      + this uses an alternative form of ini_curvilinear_grid.F which
3179        is not necessarily any better than the current one...
3180    
3181    checkpoint40pre4
3182    o added re-initialisations of utrans,vtrans,rtrans in
3183      calc_common_factors which are crucial for TAF.
3184    o extended iMin,jMin range for calc_common_factors,
3185      calc_diffusivity
3186    o added option ALLOW_PASSIVE_TRACER
3187    o a few minor updates and fixes
3188    
3189    checkpoint40pre3
3190    o created calc_gtr1.F for gad package
3191    o split the_main_loop and re-introduced forward_step
3192    o some recomputations of nIter0 for TAMC
3193    
3194    checkpoint40pre2
3195    o Updated to latest branch of AJA, JMC
3196    o Added gradient check package
3197    o Added routines for passive tracer handling
3198    o Added carbon sequestration sensitivity experiment
3199    
3200    checkpoint39
3201     o Modifications and fixes to support TAMC
3202       (mainly missing or wrong directives)
3203     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3204       in addummy_in_stepping
3205     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3206     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3207     o Included following packages:
3208       cal: calendar
3209       exf: external forcing
3210       ecco: essential routines to control use of cal, exf
3211             (NB: this is not the full ECCO environment)
3212     o disabled some packages by default in genmake
3213    
3214  checkpoint38  checkpoint38
3215   o see notes_c37_adj.txt   o see notes_c37_adj.txt
3216   o corrected wrong layer index in external_forcing_t   o corrected wrong layer index in external_forcing_t

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