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revision 1.193 by edhill, Thu Oct 23 04:41:40 2003 UTC revision 1.824 by mlosch, Wed May 30 09:27:05 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  untagged  o pkg/obcs:
8     - bug fix for balance code
9    o pkg/seaice:
10      - allow values of SEAICE_elaticParm > 1
11      - make lsr boundary conditions free slip (by default)
12      - add code for no slip boundary conditions for lsr
13      - set minimum of zeta to zero (and not 4e8) (changes results)
14    o change calculation of Visbeck K:
15      - no longer depend on tapering scheme; instead, compute slope (limited
16        by GM_maxSlope). this is equivalent to what was comuted before with
17        clipping or linear tappering.
18      - fix vertical averaging (wrong by 1 level)
19      - leave the old version (but will not be maintained) within
20        #ifdef OLD_VISBECK_CALC / #endif
21    o change error catch in calc_r_star to improve vectorization
22    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
23      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
24    
25    checkpoint59b
26    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
27      - export/import (between ocean & coupler) fields needed for ocean DIC.
28    o pkg/seaice:
29      - get rid of three more exchanges seaice_calc_viscosities (required
30        different loop boundaries in seaice_lsr and seaice_ocean_stress)
31      - bug fix in seaice_ocean_stress (update of lab_sea required)
32      - reduce loop boundaries to necessary minimum also in seaice_evp
33      - go back to the old way of computing deltaC/Z as the adjoint likes that
34        better
35    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
36      passive tracer to an Age Tracer) + update output.txt
37    o pkg/exf:
38      - implement A-grid / C-grid selection for wind-stress input files.
39      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
40      for now, in exf_bulk_largeyeager04.F only :
41      - change implementation for case where windspeed + 2. components wind-stress
42        are read-in. AND use rhoConstFresh to convert evap.
43    o pkg/seaice:
44      - use correct EXCH_UV for wind-forcing (on A-grid).
45      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
46        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
47    o pkg/exf:
48      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
49      EXF_INTERPOLATION:
50      - merge global_with_exf/code version of exf_interp_read.F
51        to the main code ;
52      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
53        reading the file ; Important: This options needs to be defined to recover
54        previous code.
55        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
56      - no longer loose real*8 precision along the way when using exf_iprec=64.
57    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
58      - change discretisation of evp-solver in order to avoid another exchange
59        (changes lab_sea) and clean up a little
60      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
61        help the adjoint (this also changes the results slightly)
62      - add a few "_d 0" where they had been missing in seaice_evp.F
63      - cleaning up: remove unused seaice_calc_rhs.F
64    o pkg/exf: some cleaning-up:
65      - change various "constants" into runtime parameters
66      - cleaned-up Large&Yeager04 routine which should eventually
67        replace exf_bulkformulae.F (changed names of S/R and CPP)
68        and merged various ALLOW_ATM_WIND options
69     only used with thsice pkg (in thsice_get_exf.F):
70      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
71        which are used when useStabilityFct_overIce=TRUE (= the default)
72      - change default values of ice & snow emissivity and scale downward LW
73        by ice & snow emissivity.
74    o pkg/thsice:
75     fix few little problems, in thsice_calc_thickn.F:
76      - growth vertically (and not laterally) if iceFrac == iceMaskMax
77      - melt laterally only if hIce < hThinIce (as the comments say)
78      and in thsice_extend.F:
79      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
80      - start to form ice as soon as the minimum ice-volume is reachable.
81     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
82      and cpl_aim+ocn
83    o pkg/kpp
84     - move computation of surface related input fields to KPP into a new
85       subroutine kpp_forcing_surf.F
86     - remove wrong (within bi,bj loops) EXCH calls.
87     - little cleaning (add argument myThid in last position, cvs header ...)
88     - for now, fix conservation problem by exchanging KPPviscAz (may not
89       be the best fix)
90    o pkg/seaice
91     - check for inconsistent evp parameter/cpp-flag combination
92     - remove leftover errIO flat for obsolete name list error handling
93    o OpenAD
94     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
95    
96    checkpoint59a
97    o pkg/seaice: some parameter clarifications and a little bit of clean up
98    o pkg/thsice: rename run-time parameters:
99       himin       -> hIceMin
100       himin0      -> hThinIce
101       hihig       -> hThickIce
102       i0          -> i0swFrac
103       transCoef   -> bMeltCoef
104       frac_energy -> fracMelting
105      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
106       with default values (for now) that do not change the results.
107      remove old version of thsice vars advection in pkg/seaice.
108    o in FFIELDS.h:
109      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
110      - make pLoad & sIceLoad always available (but still only used if
111         ATMOSPHERIC_LOADING is #define).
112    o pkg/kpp: replaced _KPP_RL with _RL
113    o bug fixes for vertical diffusivity computations when both KPP and
114        3D diffusivity arrays are used.
115    o pkg/seaice: fix bug in evp solver, while doing that
116      - change (improve?) discretization of stress computations for both
117        cgrid-lsr and evp solver
118      - add a new routine to compute strain rates
119      - the above changes lab_sea results
120      - add no slip conditions for evp solver (off by default), lsr-version
121        may follow
122      - fix exchange for shear at Z-points (does not change lab_sea)
123      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
124        (to force the user to pick a time step since there is not "safe" way
125        of choosing it)
126      - add principal stress diagnostics
127      - rearrange fields for evp a little to avoid having to call a: too many
128        exchanges and b: exchanges for stress trensor components which we do
129        not have.
130      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
131        of evp, complete rewrite for lsr case (latter is does not yet work
132        in all cases)
133    o pkg/kpp: add code to have mixing in shelf ice caverns
134      - add myThid to all kpp routines (long overdue)
135    
136    checkpoint59
137    o pkg/exf:
138      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
139        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
140      - move exf header files from lower_case.h to UPPER_CASE.h ;
141        add missing cvs Header & Name
142      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
143      - add namelist param. selectStressGridPosition, exf_monFreq
144      - retire many _CLIM routines, and remove data.exf_clim
145        + params moved to data.exf
146        + climsst, climsss now handled by exf_set_gen, i.e.
147          climss?period=0 refers to constant field,
148          climss?period=-12 to monthly forcing
149      - split up namelists in data.exf
150    o pkg/seaice:
151      - remove seaice_exch and seaice_exch_uv
152      - remove superfluous exchange of theta
153      - add myThid to seaice_budget_ocean/ice
154      - add new interface for atmospheric wind forcing (C-grid only)
155        + new routine
156        + two new field (taux, tauy for stress over ice)
157        + removed one global field (DAIRN) for C-grid case only
158    o pkg/thsise
159      - 2nd set of modifs for thsice adjoint in conjunction with exf
160    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
161    
162    checkpoint58y_post
163    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
164      vertical diffusivity, similar to that in MOM4; turned on using
165      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
166      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
167    o Added capability for 3D specification of background vertical diffusion
168      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
169      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
170      "data" file that contains the 3D vertical diffusivity coefficients.
171    o ice dynamics (pkg/seaice) with thsice thermodynamics:
172      - add code within pkg thsice to advect & diffuse sea-ice fields
173      similar to (and will replace) what has been added in  seaice_advdiff.F,
174      but: - conserving Mass, Heat & Salt.
175           - better when using non-linear advection scheme (not yet fully tested)
176           - can also be used in atmospheric set-up (for now, only the diffusion).
177    
178    checkpoint58x_post
179    o IO option for global-file compact format:
180      - add options when generating topology (utils/exch2/matlab-topology-generator)
181      - add I/O capability (pkg/mdsio).
182      - adapt utils/matlab/rdmds.m to read this format.
183      for now long-line format not yet supported by pkg/mdsio (& exch2).
184    o shelfice: add a few diagnostics
185    
186    checkpoint58w_post
187    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
188      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
189      (and replace horiVertRatio in NH code).
190      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
191                         and tutorial_plume_on_slope (sensitive to truncation)
192    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
193      directly to drive seaice model (C-grid only)
194    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
195     - reintroduce computation of wind from stress,
196     - compute tau (in exf_bulkformulae.F) from windstress averaged to
197       mass points to avoid tau = 0
198     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
199    o rdmnc.m: make it work with "global" files created with gluemnc
200    o rdmnc.m : some improvements in dealing with singleton dimension
201      (tested on all testreport mnc output files).
202    o genmake2: disable pkg/profiles if netcdf test fails.
203    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
204    o move call to cal_readparms up to make calendar parameters/variable available
205      to all packages
206    
207    checkpoint58v_post
208    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
209      useDynP_inEos_Zc tested.
210    o pkg/exf: changes to properly interpolate/mask/scale initial fields
211    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
212      and portions thereof.  See read_cs.txt for description and examples.
213    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
214      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
215      following the great-circle arc between those 2 points.
216    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
217      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
218    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
219     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
220     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
221     - still needs work (not working with some options ; efficiency to improve)
222       and serious testing.
223     - use this scheme for temperature & salinity in 2 advection test exp.:
224       advect_xy & advect_xz, respectively.
225    
226    checkpoint58u_post
227    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
228    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
229    o testreport: add option "-skipdir" to skip some test.
230    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
231      momentum calculation.
232    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
233    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
234      remove checkpoint.F and the_correction_step.F (no longer used);
235      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
236    o add option (linFSConserveTr) to correct for tracer source/sink due to
237      Linear Free surface
238    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
239    o pkg/thsice: fix reading mnc-pickups
240    
241    checkpoint58t_post
242    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
243    o pkg/mdsio:
244     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
245       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
246       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
247     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
248     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
249       either MDS_READ_FIELD or MDS_WRITE_FIELD )
250     - new S/R (to replace MDSWRITEMETA), which allows to write more
251       informations (variable names, time ...) to meta files.
252     - modify rdmds.m to give back the meta file content.
253    o pkg/diagnostics: change vertical interpolation to be safer, and more
254       flexible (define p-levels to interpolate to in data.diagnostics);
255      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
256       diagnostic pointer.
257    o pkg/seaice: more cleaning up of seaice_growth, added many comments
258    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
259    o fix multi-category seaice:
260     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
261       SEAICE_MULTICATEGORY
262     - fix short wave heat flux
263    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
264       and allow to use EVP solver. Change forward lab_sea: test both EVP
265       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
266    o Initial check-in of lab_sea adjoint
267      (very similar to natl_box_adjoint/code_seaice)
268      * used C-grid and EVP solver
269      * used KPP, GM/Redi
270      * uses inAdExact=.TRUE.
271      * gradient checks fail for both ADM and TLM
272        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
273        f.d. gradients actually seem more problematic than ADM, TLM gradients;
274        issue is related to forward mismatch between g77 an ifort
275    o pkg/seaice: overhaul of thermodynamics
276     - growth.F and groatb.F are replaced by new routine seaice_growth.F
277     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
278     - move a few global fields out of SEAICE.h into seaice_growth.F and
279       make them 2D (FICE/QNETO/ ...)
280     - remove FO (it is the same as QNETO)
281     - introduce a few local fields to avoid modifying external fields such
282       as atemp, etc.
283    
284    checkpoint58s_post
285    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
286      changed exf_set_gen.F so that
287        genperiod=0 means input file is one time-constant field and
288        genperiod=-12 means input file contains 12 monthly means
289    o CG2D: use pre-computed solver main-diagonal (stored in common block);
290      this affects truncation error ; generate new output file for exp. which
291      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
292        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
293        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
294        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
295        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
296        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
297    o start implementation of deep-atmosphere and anelastic formulation
298    o verification: remove 2nd copy of input files and use script "prepare_run"
299      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
300    o mom_common/vecinv/fluxform: fix a few initialisation isssues
301    o profiles: fix for multithreaded case
302    
303    o diagnostics: rename few diags:
304      s/'PRESSURE'/'RCENTER '/g
305      s/'TICE    '/'oceFreez'/g
306      s/'TAUX    '/'oceTAUX '/g
307      s/'TAUY    '/'oceTAUY '/g
308      s/'SWFLUX  '/'oceQsw  '/g
309      s/DIFx/DFxE/g
310      s/DIFy/DFyE/g
311      and add few ocean-forcing diagnostics:
312      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
313    o modifications to pkg/seaice/growth.F and budget.F, which change results of
314      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
315      as actual snow thickness.  It now refers everywhere to effective snow
316      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
317    
318    checkpoint58r_post
319    o modifications to pkg/seaice/growth.F, which change results of
320      lab_sea experiment: fixes pertain to melting snow over open water, to
321      masking EVAP under sea ice, and to using the correct AREA variable for
322      computations of EVAP, PRECIP, HSNOW, and GHEFF
323    o add ability to read bathy, salt, and theta using MNC (off by def)
324    o add flooding algorithm and advection of HSNOW for pkg/seaice;
325      both are turned off by default and do no change any results
326    o seaice advection with pkg/thsice: a step toward the use of non-linear
327      advection scheme, but #ifdef or commented out for now (requires more EXCH).
328    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
329      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
330      in natl_box (affects results @ truncation level: update output.txt)
331    o multi-threading and IO:
332      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
333      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
334        (needed to work with SingleCpuIO): tested in all verif. exp.
335    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
336      affects the results (but none of the verification test uses this scheme).
337    o Adding some pkg/diagnostics capability to pkg/seaice
338      (will certainly be subject to changes)
339    o ctrl: adding new control variables:
340      lwflux, lwdown, evap, snowprecip, apressure, runoff
341    
342    checkpoint58q_post
343    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
344      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
345      high_res_cube configuration by 4% on Columbia.
346    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
347      add (in global_with_exf/code) a version of EXF_INTERP_READ without
348      dynamical allocation (seems to work in multi-threaded).
349    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
350      single CPU io) so that TAF does not have to see EESUPPORT.h
351    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
352    
353    checkpoint58p_post
354    o obcs: stop if obcs is used with useCDscheme = .true.
355    o shelfice:
356     - fix a sign error so that no slip at shelfice interface works
357     - remove stop for combination non-hydrostatic code and shelfice. That does
358       not mean, that the results are correct, but at least they are numerically
359       stable
360    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
361    o added adjoint exch routined for all exch*3d* routines
362      and updated flow directives
363    
364    checkpoint58o_post
365    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
366      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
367    o change controling S/R for writing pickup file (new S/R do_write_pickup)
368      and clean-up reading/writing of pickup files.
369    o fix local version of read/write pickup (NH part) in rotating_tank/code
370    o simplify EXCH interface:
371     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
372     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
373    o added the regrid package
374    o shelfice:
375     - add a simple boundary layer scheme to reduce noise
376     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
377    
378    checkpoint58n_post
379    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
380       local variable (not in common block).
381    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
382      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
383      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
384        to work with SingleCpuIO.
385    o add "_d 0" to real constant of pkg/cfc subroutines ;
386       update exp. cfc_exemple & tutorial_cfc_offline output files.
387    o multi-threading and IO:
388      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
389        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
390      - barrier before and after reading.
391      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
392      - avoid using MDS_WRITELOCAL for LAND pkg output.
393      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
394        common-block variables ; Allows multi-threading with master-thread IO.
395    o change default MAX_NO_THREADS from 32 to 4 ;
396      and stop cleanly when MAX_NO_THREADS is too small.
397    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
398    
399    checkpoint58m_post
400    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
401       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
402    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
403       keep global_ocean.90x40x15 (for AD testing) with former secondary test
404       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
405    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
406        add MITgcm_tutorials (= code + all the tutorials)
407    o ecco, option to compute cost for total ssh (mean+anom)
408    o consistent with addition of ptracer and ssh in pkg/profiles
409    o profiles: adding ptracer and ssh
410    o testreport: change multi-test output-file name
411      (from output.txt.{name} to output.{name}.txt)
412    o profiles: now ok for mutli-tiles case
413    o seaice: add 4 parameters for different advection schemes for area,
414      (effective) seaice thickness, enthalphy, and snow height. Their default
415      is the standard parameter SEAICEadvScheme
416    o calc_gw:
417     - add cosFacU in zonal viscous flux (harmonic.visc.).
418     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
419       of tutorial_plume_on_slope.
420    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
421    o calc_gw: true flux-form, account for horizontal grid spacing.
422      update rotating_tank results, but not plume_on_slope (affected at
423      truncation level, 11 digits).
424    
425    checkpoint58l_post
426    o calc_gw:
427     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
428     - remove side-drag for now (need to fix it); update plume_on_slope results.
429     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
430    o commit code to make SST/SSS weights spatially variable
431      (based on either variable in-situ or variable initial T/S weights)
432    o pkg/ecco:
433      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
434        now based on horizontally varying weights wthetaLev, wsaltLev
435      * cost_averagesflags now returns year indices in addition to day, month
436      * sflux balance is performed on annual basis
437        (sflxumm, sfluxmm2, bal_sfluxmm)
438      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
439        including separate counting and multipliers
440    o pkg/rbcs
441      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
442    
443    checkpoint58k_post
444    o testreport:
445     - always build in dir. "build" (if not there, mkdir build instead of building
446       & running in input)
447     - run in dir run (if it exists), in build otherwise.
448     - call prepare_run (if input/prepare_run exists)
449     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
450    o pkg/exf modifications to interpolation and rotation routines for more
451       reasonable treatment of North Pole singularity: for tracers North Pole
452       value is set to northernmost zonal-mean value, for zonal velocity it is
453       set to zero, and for meridional velocity it is set to northernmost value.
454    o pkg/exf/exf_check_range.F
455     - add tile index to diagnostics and move stop statement to the very
456       end of the routine.
457    o pkg/diagnostics: (diagnostics_main_init.F)
458      define title of isomorphic variables according to the current config.
459    o pkg/thsice with pkg/seaice dynamics:
460    - fix domain of computation (interior only, required for exf) and do exchanges
461    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
462    o towards a standard way of dealing with multi-threading in MONITOR
463      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
464    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
465       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
466    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
467    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
468    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
469       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
470    o tracer advection:
471     - clean-up and simplify calc_common_factors.F
472     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
473       advection subroutine (but still not used within DST advection S/R)
474    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
475    
476    checkpoint58j_post
477    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
478      from file (collects calls previously in FORWARD_STEP)
479    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
480    o adjoint store dir. adjusted accordingly
481    o genmake2
482      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
483    
484    checkpoint58i_post
485    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
486      on wind stress (SEAICEstressFactor defaults to 1.)
487    o Total number of Timers is finite (<=40): comment out 2 non-essential one
488      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
489    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
490      on CS-grid: no longer loosing mass.
491    o exf & curvilinear-grid: no longer modify longitude xC & xG.
492    o pkg/ggl90: fix sloppy output and fix a bug
493    o pkg/seaice: added SEAICEuseEVPpickup parameter
494      - Set to false in order to start EVP solver with
495        non-EVP pickup files when using SEAICEuseEVP
496      - fix sign error in diffusion in seaice_calc_rhs
497    
498    checkpoint58h_post
499    * Modifications for bottom topography control
500      o replace hFacC by _hFacC at various places
501      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
502      o add non-self-adjoint cg2d_nsa
503      o update autodiff support routines
504      o re-initialise hfac after ctrl_depth_ini
505      o works for 5x5 box, doesnt work for global_ocean.90x40x15
506    * Adding verification for 5x5 box (4-layer) bottom topography control
507    
508    checkpoint58g_post
509    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
510       used for mean seasonal cycle, mean diurnal cycle); add an example
511       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
512    o pkg/ggl90:
513      - add parameter (minimum surface kinetic energy)
514      - fix bug (avoiding division by zero)
515    o couple pkg/thsice to pkg/seaice:
516      - modify advection in seaice to accomodate new scalar fields to be advected
517      - only muliDimAdection scheme work with seaice/thsice
518      - mapping of thsice-variables to seaice-variables, back and forth
519      - does not break the verification experiments, but does not give the
520        desired results either
521    o pkg/seaice
522      - make (default) second order advection a bit less confusing?
523    
524    checkpoint58f_post
525    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
526      to pkg/seaice):
527      - new routines thsice_map_exf and thsice_get_exf provide the interface
528      - add an additional formal parameter to thsice_solve4temp
529    o pkg/exf:
530      - add new fields wspeed, snowprecip (to be able to couple to thsice)
531      - correct Stefan-Boltzmann constant
532      - new parameter for longwave surface emittance
533      - separate some stuff from exf_bulkformulae into new routines  
534        exf_radiation, exf_wind
535      - add new parameters and constants: longwave emissivity for ocean, ice
536        and snow, evaporation parameters over ice
537      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
538        either wind from stress or stress from wind
539    o pkg/thSIce:
540    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
541    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
542       and THSICE_CALC_THICKN
543    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
544    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
545      to make debugging easier.
546    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
547    o pkg/bulk_force:
548      - clean-up comments and parameters ;
549      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
550    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
551      generate new output for test-experiment: aim.5l_cs.thSI
552    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
553      testreport accordingly
554    
555    checkpoint58e_post
556    o SEAICE_CGRID adjoint done
557    o R_STAR adjoint implemented.
558      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
559      * need to sort out init. of h0facc, etc.
560    o Make pkg/profile fully independent of ecco,cost, etc. stuff
561      to be able to use it in pure forward.
562    
563    checkpoint58d_post
564    o upgrade simple test-experiment to tutorial example:
565     step.1: duplicate the experiment and (step.2) will remove the old copy.
566      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
567      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
568      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
569      tutorial_global_oce_biogeo    <- copy of dic_example
570      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
571      tutorial_plume_on_slope       <- copy of plume_on_slope
572      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
573      tutorial_global_oce_optim     <- empty for now (David ?)
574      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
575     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
576    o correct a sign problem in cost_scat.F
577    o obcs and ptracers: fix boundary conditions for advections schemes
578      with larger stencil
579    o thsice adjoint: start
580    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
581      completeness
582    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
583      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
584    o ptracers adjoint:
585      * avoid extensive recomputatations
586      * fix missing re-init. of gptr (missed by TAF)
587    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
588      me to turn off the excessive output to STDOUT that this package produces
589    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
590      and add those terms in Vector-Invariant formulation.
591    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
592      if the control period (xx_hfluxperiod etc) is 0
593    o in profiles pkg, clean routines and fix details
594    o in ecco pkg, reading ssh data:
595      fix problem in case the model does not start at iter0=0
596    o fix mnc-pickup/restart for ptracers
597    o new package prifiles:
598      code to compute profile-based cost by Gael Forget
599      (modifs in ecco, ctrl, autodiff)
600    o Benign bug fix in initialization (spotted by M. Mazloff) of
601      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
602    
603    checkpoint58c_post
604    o adjoint: finish NLFS adjoint and provide reference output in
605      verification/global_ocean.90x40x15/results_ad_nlfs
606    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
607      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
608      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
609      with SEAICE_CGRID defined.
610    o move calendarDumps from "data" to "data.cal" and clean-up the code
611      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
612    o add useEXF & useCAL flags (for now, set in hard-coded way)
613    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
614      (were missing in NH mode, and wrong in quasihydrostatic mode).
615      waiting for Chris updated version of calc_gw to add those CALLs.
616    o fix bug in quasihydrostatic S/R ;
617      add a test for this option: global_ocean.90x40x15.qshyd
618    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
619      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
620    o add on/off flag useOffLine for package OFFLINE
621    o seaice:
622      - modify advection so that it works also on the C-grid
623      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
624        problem in multi-tile runs with C-grid
625      - add flags for clipping ice velocities and/or masking solver forcing
626      - fix drag (ocean on ice) formulation and a bug that caused noise in the
627        C-grid solver
628      - added a few comments to seaice_diffusion.F
629      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
630        are now exclusive)
631      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
632        required re-ordering the code a little:
633       + make DAIRN global variable (defined in SEAICE)
634       + move computation of the viscosities eta and zeta into a new separate
635         routine (because I need to recompute them in seaice_ocean_stress.F)
636    
637    checkpoint58b_post
638    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
639      update output.txt of exp. aim.5l_cs.thSI
640    o various mnc cleanups and improvements:
641      + shrink lookup tables by factor of ~4
642      + better error reporting when running out of lookup space
643      + able to handle longer path/file names (up to 500 chars)
644    o adjoint:
645      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
646      - TBD: "hidden" mom_vecinv recomp. in dynamics
647    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
648     (allow to differentiate between forcing components using new integer flags:
649      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
650     and add new flag to put Dissipation tendency out of Adams-Bashforth.
651    o ecco
652      - enable trend removal from SSH anomaly obs.
653    o adjoint
654      - a fix for PmEpR when #undef EXACT_CONSERV
655      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
656      - try to fix "hidden" recomp. in forward_step for NLFS
657        (NLFS seems broken sometimes after I checked it in)
658    o seaice:
659     - add c-grid version of the dynamic solver:
660       + three new routines that are the c-grid substitute lsr, dynsolver
661         and ostres
662       + put a few fields that were local to dynsolver into global common
663         blocks, so that I can move the computation of stresses etc into
664         seaice_lsr (saves coding but may break the adjoint).
665     - replace more hardwired parameters by runtime parameters
666     - add ice masks that mask the rhs of the implicit solvers where there
667       is no ice (commented out in seaice_dynsolver, because i am not sure
668       if this works properly), eventually this should replace the clipping
669       of ice velocities in seaice_dynsolver to +/-40cm/s.
670    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
671      include it only where its needed
672    o move balancing of fluxes before the call of external_forcing_surf
673    o seaice:
674      - correct units of turning angles (now they are really in degrees)
675      - move computation of GWATX/Y out of main routine into dynsolver
676      - initialize GWATX/Y in seaice_init
677    o Apply mask on Fresh-Water flux (needed for SSH forcing).
678      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
679    o seaice: add runtime flags for turning angles (default to zero)
680    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
681      and trend from exf forcing and ctrl control adjustments
682    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
683      (since checkpoint57x_post)
684    o change the default rotation period to 86164.s = the Earth rotation
685    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
686      and based on a reference stratification. Tested within hs94.cs-32x32x5.
687    o seaice advection: add code for choosing between the default (2nd order
688      central differences) and multiDim advection schemes provided by
689      pkg/generic_advdiff
690    o seaice:
691      - removed all references to SEAICE_GRID.h fields from
692        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
693        (cubed-sphere configuration will change a little)
694      - grid computations in seaice_init are obsolete now.
695      - cleaned up code a little so that is easier to read (hopefully).
696      - added new (better?) discretizations of default advection and diffusion
697        (turn on with SEAICEuseFluxForm)
698      - replace 1 in 3d global fields by kSurface in growth.F
699      
700    checkpoint58a_post
701    o seaice:
702      - bug fix in advect.F
703    o shelfice:
704      - separate shelfice load anomaly from pload (breaks with time
705        dependent forcing), => introduce constant field shelficeLoadAnomaly.
706        Its default is 0., but it may be computed more cleverly from (unknown)
707        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
708        done offline. A good approximation of the pressure load anomaly is
709        necessary to avoid large initial adjustment processes underneath
710        deep-reaching shelfice.
711      - small fix in ISOMIP shelfice_thermodynamics
712      - add more sophisticated thermodynamics of Hellmer (1989), this is
713        now the default
714      - give a few constants more intuitive names
715    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
716      if bulk formulae are used in long integration (especially EmPmR). Turn
717      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
718      if balancePrintMean, the imbalance that is substracted is printed to
719      STDOUT.
720    o fix bug (typo) in obcs_apply_eta.F
721    o add a new package shelfice which enables us to model the circulation
722      underneath shelf-ice with draughts of hundreds of meters.
723     - works
724     - to do: + include improved thermodynamics
725              + check whether kSurfC (from model/inc/SURFACE.h) can be used
726                instead of new field kTopC
727              + can we use topoFile, Ro_surf and existing code in ini_depth.F
728                instead of new field R_shelfIce and new code in ini_depth.F
729                and ini_mask_etc.F?
730              + adjust vertical mixing schemes?
731    o seaice pkg:
732     - add a cpp-flag to include a simple formula for a salinity dependent
733       freezing point of sea water at the surface
734     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
735       meridional stresses are now different (and hopefully correct)
736    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
737       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
738       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
739    o pkg/diagnostics: add options and parameters for regional-statistics
740       diagnostics ; define regions by reading a region-mask from a file
741       (might add other options later)
742    o pkg/bulk_force:
743     - add option and parameters to use AIM surface-flux formulae.
744     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
745       others forcing fields (defined in PARM05, parameter file "data") are loaded
746       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
747     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
748     - use the right EXCH call for uwind,vwind (to work on CS-grid).
749     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
750       and parameters (note: calcWindStress replaces .NOT.readwindstress).
751     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
752    
753    checkpoint58
754    o add "--embed-source" option to genmake2 which, when the supporting
755      tools can be compiled (as determined by genmake2) will turn on the
756      embed_files package which then embeds the entire MITgcm source code
757      (*.[fFhc] + Makefile) used for the build within the executable
758      - requested by CNH but off by default
759      - adds a paltry <9MB to the mitgcmuv executable in most cases
760      - only writes the output when useEMBEDSRC in eedata is true
761    o clean up 3-dim. relaxation codes:
762      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
763      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
764      * Thanks to Tom Haine for testing!
765    
766    checkpoint57z_post
767    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
768      affects output (@ truncation level) of exp. plume_on_slope ; updated.
769    o fix the pickup behavior for obcs in combination with ptracers
770    o fix a bug in ptracers_external_fields_load
771    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
772      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
773    o transfered surface NH pressure to eta field (if exactConserv).
774    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
775         and update lab_sea output.txt file.
776    o completing 3-dim. relaxation code: additional term
777         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
778      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
779      * At compile time, in "EXF_OPTIONS.h" set
780          #define  ALLOW_CLIMTEMP_RELAXATION
781          #define  ALLOW_CLIMSALT_RELAXATION
782      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
783          tauThetaClimRelax3Dim = 15552000.0,
784          tauSaltClimRelax3Dim  = 15552000.0,
785      * 3 cases:
786          1) Use a constant-in-time 3-dim. field
787          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
788          3) Real-time relax. to time-evolving prescribed field
789    o Adding Laplacian-type smoothness constraint on
790      initial and boundary (forcing) controls (ic, bc)
791      * enable at compile-time via
792        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
793      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
794      * Absolute scale somewhat unclear so far
795      * no area weighting was included since no other cost term does so far
796    
797    checkpoint57y_post
798    First step for a NLFS adjoint
799    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
800    o new init. routines for calc_r_star, calc_surf_dr
801    o still need to deal with ini_masks_etc
802    o testreport seemed happy
803    checkpoint57y_pre
804    
805    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
806    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
807    o add new offset feature to offline pkg (plus minor cleanup)
808    o cfc fixes for final year of integration
809    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
810      be in GCHEM_OPTIONS).
811    
812    checkpoint57x_post
813    o fix testreport Pb in multiple test experiment.
814    o cleanup our namelist syntax in verification:
815      - make it more F95 standards compliant (some work still needed)
816      - allows the vast majority of our tests to work with gfortran
817    o Non-Hydrostatic:
818     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
819     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
820    o Allow to apply AB on T,S rather than on AB(gT,gS):
821     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
822     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
823       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
824     - need a "clever" read_pickup to restart from the other AB formulation
825    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
826    o remove some unused variables (reduces number of compiler warnings)
827    o adjoint
828      * Disable useVariableViscosity for adjoint for time being
829        (there are a number of extensive recomputations)
830      * Initialize certain variables needed for adjoint
831    
832    checkpoint57w_post
833    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
834                 fix the singleCpuIO RS version of MDSWRITEFIELD
835       and add a WARNING if using globalFiles=T with multi-processors.
836    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
837      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
838    o tracer advection scheme:
839      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
840       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
841       was not very convenient).
842      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
843       (further tests needed for the implicit DST & Flux-Limiter schemes).
844    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
845      and sRef for convenience, handy, when you want to initialize
846      ptracers in a large domain with a constant non-zero value. Also,
847      untangle ptracers_init.F a little.
848    
849    checkpoint57v_post
850    o change dome exp. to use variable viscosity in side-drag terms.
851    o remove all the files from the cfc_offline test since they are now
852      incorporated into tutorial_cfc_offline which has been producing
853      identical results for a few days of testing
854    o add new parameter: sideDragFactor to enable half-slip-side BC
855      and change side-drag S/R to use viscosity from mom_calc_visc
856      (can switch back by setting sideDragFactor=0.); affects results at
857      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
858       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
859    o vorticity & strain are now computed without masking, to account for
860      no-slip-side BC in variable viscosity calculation ; mask is applied
861      anyway later on, before computing advection/coriolis terms.
862    o modify exp4 to test new obcs support for reading from external files
863      and for passive tracers
864    o fix behavior of ptracers_monitor when monitor output is written to a
865      netcdf-file; still not independent of monitor.F (writes in the same
866      file).
867    o change default value of tRef (put a uniform, meaningful value for ocean
868      & atmos) and initialize sRef (was missing, as Martin mentioned).
869    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
870      to be proportional to enstrophy dissipation length.  Thus,
871       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
872      This is now consistent with Smagorinsky and with the manual.
873    
874    checkpoint57u_post
875    o OBCS and PTRACERS: add open boundary support for passive tracers
876      - either use homogenous (pseudo) v.Neumann conditions or prescribe
877        OB-values from file; this is not different from the way theta and salinity
878        are treated
879      - however, Orlanski-radiation conditions are not supported, and the model
880        will stop if you use pTracers and Orlanski at the same time.
881      - beefed up the rountine obcs_external_fields_load: now only those open
882        boundary values are overwritten with values from files for which there
883        are really files, otherwise the OB-fields remain untouched. This makes
884        it possible to use different OBs at different ends of the domain (as
885        with EXF)
886    o reduce number of exch calls in shap_filt (s2).
887    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
888      truncation level) 4/5 MLAdjust test results (11&12 digits match).
889    
890    checkpoint57t_post
891    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
892    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
893      same truncation, independent of the face number: affects affects several
894      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
895    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
896      note that biharmonic viscosity + no-slip was not tested in any experiment.
897    o fix bug in non-linear free-surf side-drag ; generate new output for
898      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
899    o make mnc honor the writeBinaryPrec flag for most kinds of output
900    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
901    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
902      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
903    o add brackets in multi-terms sum to get same truncation, independent of
904      the face number (manage to get exactly same value of gU,gV at the cs-edge)
905      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
906    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
907      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
908      a maximum grid-scale Reynolds number.  Also, changes all length calculations
909      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
910      Suggested values of viscosity parameters found in mom_calc_visc.
911      Many new viscosity diagnostics available.
912    
913    checkpoint57s_post
914    o Add clearing-house for viscosity calculations, mom_calc_visc and
915      correct numerous bugs in LeithD and Smagorinsky discretizations.  
916      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
917      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
918      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
919      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
920      The Strain-Tension form is now called with useStrainTensonVisc=.true.
921      ViscAhStrain and viscAhTension are now retired.
922    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
923    o In response to JMC's bug report, genmake2 now ignores any soft-links
924      that it finds in the *current* directory when searching for files.
925      Soft-links found in any other source directories will still work as
926      they did before.
927    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
928      a C routine to unlimit the stack size
929    o mnc-ify pkg/aim snapshot vars
930    o mnc-ify pkg/land as requested by Daniel
931    o various changes to mnc including:
932      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
933      - output can now be grouped so that all files within a group
934          change the ITER portion of their names in lock-step together
935      - can now read ("global") PER-FACE (in addition to PER-TILE) files
936          and works with both EXCH1 and EXCH2 (but needs more testing)
937      - writing works for all verification test cases w/ g77 on Linux
938    
939    checkpoint57r_post
940    o make MNC variable initialization happen earlier
941    o add diagnostics for (almost) each term of the momentum Eq.
942    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
943    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
944    o remove MINIMAL_TAVE_OUTPUT option ;
945      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
946    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
947      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
948    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
949    o add time-dependent SST, SSS control
950    o cost terms in ecco/ modularized (new cost_generic.F)
951    o cost_averages routines are modularized (new cost_averagesgeneric.F)
952    o new infrastructure for seaice model vs. obs misfits in seaice/
953      * driver from the_main_loop.F is seaice_cost_driver.F
954      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
955      * gradient check in Exp. 6a of natl_box_adjoint/
956    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
957      (see README file)
958    
959    checkpoint57q_post
960    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
961    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
962      - bug was reported by Jean-Michel and Ian Fenty
963    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
964      update exp. cpl_aim+ocn output.
965    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
966      Needed for high-res. runs with large global files
967      to be able to limit tapelev size
968    o Changed some tests for adjoint:
969      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
970      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
971      * global_ocean.90x40x15/ back to default 3-level checkpointing
972    o Modifications to enable scripted COMMON to MODULE conversion
973      * verification/OpenAD/code/ has necessary scripts and description;
974      * converts, compiles and runs successfully;
975    
976    checkpoint57p_post
977    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
978    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
979      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
980    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
981    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
982      (was already the case for dissipation with mom_vecinv,
983       and also the case for grad.PhiHyd when staggered-timeStep)
984      This will allow to put dissipation out-off the AB time-stepping.
985     Unfortunately, affects truncation error. Update output of exp. that "fails"
986      (cg2d matching number) and leave the others for later: front_relax(10),
987      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
988      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
989    
990    checkpoint57o_post
991    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
992      (2) its ready to be documented during the 20050801 DocFest
993    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
994      for ideal_2D_oce and lab_sea on linux_ia32_g77
995    o set to #undef CTRL_SET_OLD_MAXCVARS_30
996      in global1x1_tot/code_seaice_adj to access indices 32, 33
997      (worth another tag)
998    
999    checkpoint57n_post
1000    o adding precip control xx_precip 32
1001    o adding swflux control xx_swflux 33
1002    o Replacing 10 forcing penalty cost routines by 1 generic.
1003    o Implementing partitioning in time-mean and variable adjustment
1004      for atmos. state.
1005    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1006    o in natl_box_adjoint:
1007      * updated exp 1 to 10
1008        (but does not have time-mean vs. variable split results yet)
1009    o updated global1x1/*_seaice_adj/
1010      to incorporate latest changes
1011    o enable useSingleCpuIO for mdsio vector routines
1012      (applies in particular to tapelev I/O)
1013    o removed inefficient K-loop in all active_file*control*.F
1014    
1015    checkpoint57m_post
1016    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1017      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1018    o pkg/exch2: filling of face-corner halo regions is optional
1019      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1020    
1021    checkpoint57l_post
1022     tag before updating tutorials (pre-release-2)
1023    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1024       for output and interpolation of input fields onto model grid)
1025    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1026       Affects results of exp. rotating_tank ; update output.txt.
1027    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1028          and taking the square quantity and/or using a fraction-weight field.
1029    o fix aim_diagnostics_init.F mate numbers.
1030    o add mnc output capability to diagnostics/diagstat and update
1031      our cvsignore files for the ACSII output generated
1032    
1033    checkpoint57k_post
1034    o lab_sea now uses diagnostics package and provides a suite of
1035      new EXF diagnostics output.
1036    
1037    checkpoint57j_post
1038    o exf
1039      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1040        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1041        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1042      * extended diagnostics output
1043        - now includes all EXF variables
1044        - hs, hl moved to common block
1045        - separate S/R for diagnostics, called after ctrl vector is added
1046        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1047        - EXFqnet contains true Qnet (i.e. includes qsw)
1048      * updated verif. lab_sea, global_with_exf
1049      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1050        to ensure that diagnostics sees a true EXFqnet
1051    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1052    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1053      several times with different frequencies.
1054    o mnc-ify the thsice package as requested by Daniel Enderton
1055      - the monitor--MNC output needs work
1056      - many attributes need to be added (most are currently blank)
1057    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1058      - many attributes need to be added (most are currently blank)
1059    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1060    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1061    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1062      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1063         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1064    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1065     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1066    
1067    checkpoint57i_post
1068    o Diagnostics package was changed: diagnostic allocation is now deactivated
1069      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1070    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1071      add 1rst Order upwind vertical Shear.
1072    o add a quick fix for A/B checkpointing in OFFLINE mode
1073    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1074      end-run around the C/Fortran linking horror in eesup/src/timers.F
1075    o added pkg/runclock: allows user to terminate run based on wall clock
1076    o added non-hydrostatic scaling parameter: nh_am2
1077    o pkg/my82: futile attempt to make results compiler-independent by adding
1078      some "_d 0", etc. no effect.
1079    o for mnc output, fill the 'T' coordinate var with myTime and create a
1080      separate 'iter' variable for iteration count
1081    o pkg/diagnostics:
1082      add new capability: output of Global/Regional & per-level statistics ;
1083      tested against monitor output (including land & thSIce) on various exp.
1084    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1085    
1086    checkpoint57h_done
1087      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1088      data.diagnostics, data.gchem, data.ptracers) is done.
1089    
1090    o pkg/diagnostics: prepare for Global/Regional statistics.
1091      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1092    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1093      and rename it: DIFFERENT_MULTIPLE
1094    
1095    checkpoint57h_post
1096    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1097    o pkg/diagnostics: change output frequency, now in seconds (instead
1098      of Nb of iterations). This requires to change data.diagnostics.
1099    checkpoint57h_pre
1100    
1101    o in mnc, let the user create the output dir if both mnc_outdir_date
1102      and mnc_outdir_num are false
1103    o add fflags() to pkg/diagnostics which allows one to specify, on a
1104      per-file basis, the file precision [default behavior is unchanged]
1105    o added diagnostics to pkg/kpp, including computation of mixed layer
1106      depth based on a temperature/density criterion
1107    o updated verification/natl_box to test the new pkg/kpp diagnostics
1108    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1109    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1110    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1111      not mnc -- this mistake was found by JMC and is now corrected
1112    
1113    checkpoint57g_post
1114    o add Adams-Bashforth 3rd Order time stepping:
1115      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1116      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1117    checkpoint57g_pre
1118    
1119    o make lambda[Theta,Salt]ClimRelax spatially varying
1120      (default remains spatially uniform constant based on tau)
1121    o added new control variables
1122      * init. uVel, vVel, etanN
1123      * lambda[Theta,Salt]ClimRelax
1124    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1125      (suggested by G. Forget)
1126    
1127    checkpoint57f_post
1128    o add parameter "baseTime" = model base time = time at iteration zero
1129      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1130      account for baseTime shift
1131    o move Coriolis arrays from PARAMS.h to GRID.h
1132    checkpoint57f_pre
1133    
1134    o mnc-ifying the seaice package
1135    o introduced an alternative length scale calculation for use in the limiting
1136      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1137    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1138    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1139      as well as grad(vort3).  Made it compatible with both approximate form
1140      for the cubed sphere and full form of these gradients.  Added flag
1141      useFullLeith to select between approximate and full form.  
1142    o add "d0" in getcon.F to reduce differences between compilers/platforms
1143      update output.txt of exp. fizhi-gridalt-hs
1144    o change port_rand funtion to allow to set the seed.
1145    o fix obscure MNC bug involving conversion between reals and integers
1146      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1147        new version is now more standards-compliant
1148    o adjoint-related modifications
1149      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1150      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1151      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1152    
1153    checkpoint57e_post
1154    o Adding eddy stress controls a la Ferreira et al.
1155    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1156    
1157    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1158      update output.txt of exp. fizhi-gridalt-hs
1159    o add more "Z" dimensions and associated coordinate vars to MNC
1160    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1161    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1162      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1163      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1164      months and years.  Requires pkg/cal.
1165    o diagnostics: add pickup functionality
1166      - off by default for backwards compatibility
1167      - current version only uses MDSIO -- MNC will be added
1168    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1169    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1170    
1171    checkpoint57d_post
1172    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1173    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1174      output from the diagnostics package
1175    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1176    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1177      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1178    o add coordinate variables to the MNC output from the diagnostics package
1179    o change MNC-flags default value: true when useMNC=TRUE
1180    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1181      the ability (off by default) to read the grid information using MNC
1182    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1183    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1184    o do snap-shot diagnostics at the middle of the time-interval (instead of
1185      at the end).
1186    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1187      new test for AIM with thSIce + slab-ocean
1188    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1189    o move state variable diagnostics to the beginning of the time step ;
1190      (note: still needs some work specially for snap-shot diagnostics)
1191      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1192    
1193    checkpoint57c_post
1194    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1195    o generate new output.txt files on faulks with g77 & the new -ieee option
1196    checkpoint57c_pre
1197    
1198    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1199      update output.txt of exp. global_ocean.90x40x15
1200    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1201      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1202    o add saltFlux(+File) forcing capability with periodicExternalForcing
1203    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1204    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1205    o improvements for the MNC output from DIAGNOSTICS:
1206      - correct handling of the unlimitied dimension
1207      - all dims now have associated coordinate variables
1208      - variables located at U, V, and Corner ("Z") points are now written
1209        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1210        *all* data points are output
1211    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1212    o added pkg/seaice/seaice_monitor.F
1213    o mdsio_readfield.F can now read files visible only to master MPI process.
1214    o pkg/seaice: some test code for ice-modified ocean stress
1215    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1216      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1217      spurious negative numbers for precipitation and humidity.  Will cause
1218      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1219    o pkg/ctrl/
1220      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1221        May be enabled via doPackDiag
1222      *  introduce z-scaling of
1223         + gradient (doZscalePack) and
1224         + control (doZscaleUnpack)
1225    o pkg/mdsio/
1226      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1227      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1228    
1229    checkpoint57b_post
1230    o simplify options in diagnostics_fill arguments (remove weird combinations)
1231    o fix MNC coordinate variables so that they now contain per-face index
1232      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1233      general, EXCH2 grids are only aligned to a "local" coordinate system
1234    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1235    o Implement instantaneous output within pkg diagnostics:
1236      setting a negative frequency in data.diagnostics produces
1237     "snap-shot" output (as opposed to time-average if freq > 0)
1238    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1239      NOTE: change ptracer diagnostics name: use 2 characters to work with
1240            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1241    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1242      becomes the coordinate variable for the 'T' dimension
1243    o add CF-style coordinate variables to MNC
1244      - just a first cut:  numbers are meaningless on the cubesphere and
1245        missing along the T axis but otherwise it works!
1246    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1247    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1248    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1249      this is based directly on what the model compute, so that the content of
1250      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1251    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1252    o clean up build options files for SunOS, in particular
1253      - remove -traditional from xmakedepend
1254      - change -xarch=v9 to -xarch=native for f77
1255      - restore use of make (not gmake)
1256      - add CC=gcc if using g77
1257    o changes per discussion of AM, JMC, & EH3 today:
1258      - move redundant "grid" variables out of "state" -- in preparation of
1259        creating proper CF-style coordinate variables and in recognition
1260        that any/all grid variables can be easily copied (eg. w/NCO) from
1261        the grid files into any of the other NetCDF files
1262      - *always* output grid variables with MDSIO (this will eventually be
1263        changed)
1264      - output MNC grid file if useMNC is true
1265    o every instance of _END_MASTER() has been found and replaced with
1266      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1267      preprocessors
1268    o re-arrange diagnostics pkg initialisation:
1269     - allow each package to extend the available diagnostics list
1270     - add some checking and fix small problems (multi-threaded, ...)
1271     - new S/R diagnostics_fill (replace fill_diagnostics):
1272       look through the short list of active diag. (instead of the long list)
1273       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1274    
1275    checkpoint57a_post
1276    o this set of changes restores TAMC compatibility
1277      tested for global_ocean.90x40x15 adjoint on trough
1278      (what a pain)
1279    
1280    checkpoint57a_pre
1281    o some modifs in tools/build_options for sunos
1282    o call ctrl_pack for ctrl at end for optimcycle=0
1283    
1284    checkpoint57
1285    o add horizontal bi-harmonic viscosity for vertical velocity
1286      - new parameter viscA4W (defaults to viscA4)
1287      - affects only non-hydrostatic code
1288      - to be done: no-slip lateral boundary conditions
1289    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1290    o implement Implicit Vertical advection for pTracers
1291    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1292      (implemented also for implicit vertical diffusion & advection)
1293    o OBCS: extend application of tracer open boundary conditions
1294      to a strip beyond the boundary of width Olx/Oly
1295    o add call monitor to TAF set of required calls (flow directives)
1296      and include in natl_box_adjoint
1297    o untangle a few ifdefs related to cost, ctrl, autodiff
1298      untangel a few ALLOW_ECCO_OPTIMIZATION
1299    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1300      (theta2, salt2 in ecco_cost_weights)
1301    
1302    checkpoint56c_post
1303    o OBCS as control variables
1304      - update ctrl_ad_diff.list, obcs_ad_diff.list
1305      - remove balance of obcs controls from default
1306      - fix index bug nobcs in ctrl_init
1307      - fix dummy fields filen in ctrl_pack
1308      - add dummy weights for obcs
1309    o lsopt: comment out fort.94 output
1310    o optim:
1311      - remove unnecessary header files
1312      - adjusted namelists
1313      - add xerbla.F to Makefile
1314    o exf:
1315      - multiple modifications of exf_check_range
1316      - unit change in exf_init_runoff from [m/year] to [m/s]
1317    o mdsio:
1318      - i/o-vector change debugLevel from debLevA to debLevB
1319    
1320    checkpoint56b_post
1321    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1322      is called from DO_THE_MODEL_IO
1323      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1324      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1325      - clean up PTRACERS_WRITE_TIMEAVE a little
1326    o add another verification experiment that tests both the cfc-pkg and
1327      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1328      reactive tendencies treated inline with regular timestepping
1329    o testreport previously did a lousy job of comparing small numbers, so
1330      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1331      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1332      testreport.
1333    o ptracers_monitor: bug fix for MPI
1334    
1335    checkpoint56a_post
1336    o GCHEM: finish reorganizating the package
1337      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1338        (introduces another 3D-array for each passive tracer, but only if
1339        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1340        gchemTendency is not needed because the timestep is done separately)
1341      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1342      - GCHEM is now---more or less cleanly---separate from PTRACERS
1343      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1344        so clear to me how that should be done in a general way.
1345    o CFC: improve formatting of output in CFC_ATMOS
1346    o PTRACERS:
1347      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1348        that ALL experiments with ptracers enable can be checked. This makes
1349        GCHEM_MONITOR obsolete.
1350      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1351        monitorFreq
1352      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1353    o add PTRACERS (PTR0[1-5]) to testreport output
1354    o exf_check_range:
1355      * default changed to .TRUE.
1356      * will check values for niter0 if debLevA, every timestep if debLevB
1357      * STOP in exf_check_range if 'out of range'
1358      * range chosen generous to allow for potential extema
1359      TBD: a version with stricter range
1360           permitted range would be runtime parameters
1361    o GMredi:
1362      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1363      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1364      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1365    o GCHEM:
1366      - move call to GCHEM_FORCING_SEP, so that it is now called before
1367        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1368      - introduced a useGCHEM runtime flag and applied it everywhere.
1369      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1370        this flag is now only visible within GCHEM-pkg routines.
1371      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1372        be replaced by a 3D array that is computed before thermodynamics; for
1373        this, the tracer ID iTracer had to be included into the parameter list
1374        of ptracers_forcing
1375      - set up forward_step to call gchem_forcing, that will replace
1376        gchem_forcing_int in ptracers_forcing
1377      - cleaning up
1378    o small cleaning of exch2: remove files that are also in eesupp/src
1379    
1380    checkpoint56
1381    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1382    o mnc: cleanup "full" files--fixes out-of-memory problem
1383    o ECCO-GODAE
1384      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1385      * fully merged and updated from SIO code
1386        windstress sign change affects
1387        - exf_inscal_[u/v]stress
1388        - sign of xx_tau[u/v] adjustments
1389        - signs in cost_scat
1390      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1391      * natl_box_adjoint updated and compressed
1392      * 2-level checkpoint switch added
1393        (tested in EXP. 1 of natl_box_adjoint)
1394      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1395    o SVD
1396      * first complete, non-hacked version for SVD calculations
1397      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1398        performed via direct access files admtlm_vector.it????
1399        (via ctrl_[un]pack)
1400      * optimcycle is used for ARPACK iteration counter
1401        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1402      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1403        and add linear transforms where necessary
1404      * controls are initial/final SST, SSS (can be extended; need to check
1405        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1406    o mdsio: filename info to both stderr, stdout
1407    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1408      from sign change
1409    
1410    checkpoint55j_post
1411    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1412      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1413    o add consistent build directories and .cvsignore files to verification
1414    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1415    o make all subroutines 30 or less characters in length for certain older
1416      compilers to work (a thorough search only turns up two routines in
1417      pkg/ptracers)
1418    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1419      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1420    
1421    checkpoint55i_post
1422    o change arrays for total vertical diffusivity (2.D if explicit,
1423      3.D if implicit) ; each ptracer uses its own background value.
1424    o added mnc/NetCDF output capability to ocn_compon_interf
1425      - added bits to verification/cpl_aim+ocn so that it can run on
1426        ITRDA and other clusters without the mpirun "-wd" option
1427    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1428      configuration
1429    o give MNC the ability to create additional files rather than
1430      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1431      - the default is just less than 2GB which is a practical limit
1432        on many systems
1433    o Compute the non-local term using either KPP vertical diffusivity (=default)
1434       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1435    
1436    checkpoint55h_post
1437    o add verification test "vermix"
1438    o remove all the *_ioinc flags and replace with the single global
1439      outputTypesInclusive flag
1440    o allow to set a vertical profile of vertical diffusivity for T & S
1441    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1442    o useMNC moved from data.mnc to data.pkg
1443    
1444    checkpoint55g_post
1445    o Renaming carbon AD experiments to comply with testreport conventions
1446    o Updating adjoint of Held-Suarez hs94.1x64x5
1447    o Fixing directives for non-ECCO forward_step, after ECCO directives
1448      have been fixed to avoid recomp. of do_oceanic_phys
1449      Works well for global_ocean.90x40x15,
1450      but recomp. issue remains for carbon
1451    o Updating adjoint output for natl_box_adjoint after
1452      pkg/ecco has been modified (see taga c55d_post)
1453    
1454    checkpoint55f_post
1455    o rename to timeave_init_fixed
1456    
1457    checkpoint55e_post
1458    o some delicate re-shuffle of store directives to avoid one
1459      extra call of do_oceanic_physics
1460      affects ecco_the_main_loop.F, do_oceanic_physics.F
1461      checkpoint_lev1_directives.h
1462    o NB: this may break global_ocean adjoint temporarily,
1463      but it is clear how to fix it. Will do later, need this now.
1464    
1465    checkpoint55d_post
1466    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1467    o ecco_cost_weights is modified to 1x1 runs
1468    o modifs to allow observations to be read in as
1469      single file or yearly files
1470    o enable to read exf forcing fields as either
1471      single file or yearly files (flag useExfYearlyFields)
1472    checkpoint55d_pre
1473    
1474    o switch between 2-level and 3-level checkpointing
1475    o add ability of MNC to write local and "partial" (eg. 2D slices where
1476      the full 3D field is never actually stored) arrays to NetCDF files
1477      with the correct (that is, the complete multi-dimensional) set of
1478      array indicies
1479      - used in mom_vecinv() to write the diagFreq output
1480      - tested (demonstrated) in verification/aim.5l_cs
1481    o further mnc-ification
1482      - add verification/lab_sea to the list with mnc setups
1483      - fix undefined mnc v-names in cd_code
1484      - add kpp to mnc output (both snapshot and timeave)
1485    o non-hydrostatic code
1486      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1487        in calc_gw.F
1488      - defaults to viscAh
1489      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1490        friction or Leith) in non-hydrostatic mode, as long as there is
1491        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1492    o pkg/cost
1493      extend simple cost functions to treat time mean quantities
1494      (T,U,V) via cost_accumulate_state from cost_tile
1495    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1496        be 2 times larger than the minimum size the advection scheme requires.
1497        now get a perfect conservation of salt in advect_cs test-exp (updated)
1498    o GGL90 (Gaspar's TKE mixed layer)
1499      - add horizontal diffusion of TKE, requires exchanges in
1500        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1501        default. In OPA there is no horizontal diffusion of TKE but the
1502        mixing coefficients are computed from a horizontal average of TKE of
1503        6 points or so. I think that diffusion has a little more physical
1504        justification.
1505      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1506        was in vain)
1507      - mask tke-variable in ggl90_init
1508    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1509    o fix biharmonic diffusion on CS-grid.
1510    o more obcs stuff
1511      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1512        for reading boundary values. This routine is called from
1513        obcs_prescribe_read
1514      - updated obcs_check
1515      - changed sponge layer relaxation parameter units for days to seconds
1516      - turned off sponge layer by default
1517      - changed argument list of OBCS_CALC to myTime+deltaTclock
1518      - fixed about 35 bugs in obcs_external_fields_load
1519    
1520    checkpoint55c_post
1521    o obcs stuff
1522      - new runtime flags useOBCSprescribe, useOBCSbalance
1523      - re-arranged obcs_calc
1524      - moved exf_getobcs to obcs_prescibe_read
1525        obcs_prescibe_read is called after ORLANSKI stuff
1526        and independent of it (executable can contain all).
1527      - updated obcs_check
1528      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1529        These may be necessary only if tangential velocities are
1530        prescribed at OB, not sure, needs testing.
1531    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1532      which simplifies the calls and passes the ifc check-bounds test
1533    
1534    checkpoint55b_post
1535    o add a 2D scalar, Z location, exchange_2 routine.
1536    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1537      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1538      affects advect_cs results (for the wrong reason): update output.txt
1539    o use a more standard discretization for biharmonic viscosity ;
1540     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1541      affects results of dome set-up: update output.txt
1542    o fix gad_advection.F (CubedSphere part), back to version 1.23
1543    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1544    
1545    checkpoint55a_post
1546    o merged code to
1547      * prescribe/read time-dependent open boundaries
1548        (works in conjunction with exf, cal)
1549      * sponge layer code for open boundaries
1550      * each boundary N/S/E/W now has its own CPP option
1551        (healthy for the adjoint)
1552    
1553    checkpoint55
1554    o up-to-date adjoint of previous breaks
1555      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1556      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1557      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1558      - carbon: * remove tr1-related adjoint verification
1559                * add ptracer as control variable
1560    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1561      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1562    
1563    checkpoint54f_post
1564    o in verification/carbin/ remove experiment related to
1565      ALLOW_PASSIVE_TRACER (array tr1 etc)
1566      code_ad/ input_ad/ results_ad
1567    
1568    o add two new packages
1569      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1570        + subject to optimization (memory)
1571      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1572        + subject to reordering (many GOTOs in the original code)
1573        + so far opps is called for every (i,j) point, and then operates in
1574          the vertical; one may want to reorder the scheme in order operate in
1575          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1576          fields)
1577    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1578      - all verification tests compile and run with linux_ia32_g77
1579      - defaults are compatible with current input files--nothing
1580        should change if you were not previously using MNC
1581      - MNC output has been added in numerous places (eg. timeave)
1582        but there are still a few writes not yet do-able with MNC
1583        (this is in progress)
1584      - flags now allow for either/or/both use of MDSIO and MNC and
1585        documentation will soon follow
1586      - numerous small formatting cleanups for ProTeX
1587    o add version info (via BUILD_INFO.h) to MNC and stdout
1588    
1589    checkpoint54e_post
1590    o add two new packages
1591      - pp81 (Packanowski and Philander, 1981), Richardson number and
1592        stratification dependent mixing
1593      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1594      - these scheme operate in a similar manner as KPP (without ghat, of
1595        course), however there is only one diffusivity that is used for both
1596        temperature and salinity (and passive tracers)ç
1597    o add offline package
1598    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1599      provided by Stephanie Dutkiewicz
1600    o genmake2: add ability to search for C compilers and cleanup test output
1601      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1602    
1603    checkpoint54d_post
1604    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1605    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1606      leading to additional shift by 5 days each year of integration
1607       (i.e. leading to considerable offset over the years)
1608    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1609    o start with no AB and no initial filtering (staggerTimeStep):
1610      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1611    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1612      (external loading & cpl import/export stay in forward_step.F)
1613    o update coupling interface to work with new staggerTimeStep
1614    o change MDSIO ptracers_pickup.
1615    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1616    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1617    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1618    
1619    checkpoint54c_post
1620    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1621      this affects (truncation error) output.txt of test-exp:
1622       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1623    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1624    o change Qnet to always be the net heat flux, (+upward).
1625      affects (truncation error) output of natl_box exp.: updated
1626    o define the max number of passive tracers in PTRACERS_SIZE.h
1627    o start to test mnc routinely in exp0
1628    o add sea-ice loading (sIceLoad) as a new forcing field.
1629    
1630    checkpoint54b_post
1631    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1632       impressive on Altix and Opteron systems)
1633    o diagnostics can now write NetCDF files through the mnc package
1634    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1635    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1636    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1637      affects (truncation error) output of lab_sea & natl_box exp.: updated
1638    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1639    
1640    checkpoint54a_post
1641    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1642    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1643    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1644    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1645      + internal_wave (shift in writing cg2d_ini_res)
1646    checkpoint54a_pre
1647    
1648    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1649      - modified verification/lab_sea and natl_box_adjoint accordingly
1650    
1651    checkpoint54
1652    checkpoint53g_post
1653    o prepare splitting of thermodynamics: store convect.counter in common block
1654    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1655      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1656    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1657    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1658    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1659    o restore adjointability
1660    
1661    checkpoint53f_post
1662    o modifications that affect AIM experiment results (update output.txt):
1663      - no advection of S at top interface Nr (pkg/generic_advdiff)
1664      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1665    o AIM pkg:
1666      - include stability function into surf.Flux derivative relative to Tsurf
1667      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1668    
1669    checkpoint53e_post
1670    o merged cylindrical coord configuration
1671    o added rotating_tank experiment
1672    checkpoint53e_pre
1673    
1674    checkpoint53d_post
1675    o faulks upgraded: re-generate output.txt that have changed:
1676       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1677    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1678    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1679    o added Sadourny discretization of Coriolis
1680      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1681      - re-enabled use of omega3 (useAbsVorticity)
1682    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1683      vector-invariant equations
1684      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1685    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1686      hopefully without new bugs
1687      - still to do: biharmonic friction for non-hydrostatic w
1688    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1689    o regenerated output for global_ocean_ebm (using -ieee)
1690    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1691      of mom_common/
1692      - simple re-arrangement of instructions within computing loop
1693    checkpoint53d_pre
1694    
1695    checkpoint53c_post
1696    o new version of coupler for AIM+thSIce and Ocean models
1697     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1698     - land: change Evaporation of snow
1699     - aim with thSIce: fix bug in snow-precip.
1700    o changes to calc_gw.F
1701     - bug fix for w^2 term near the bottom boundary
1702     - (hopefully) improve the lateral slip boundary condtions for use with
1703        partial/looped cells
1704      - because the bug fix changes two verification experiments anyway (exp5
1705        and plume on slope), change the lateral boundary condition from half slip
1706        to the value of no_slip_sides
1707    o ebm package wasnt quite up to the parallel task. Fixed that.
1708    o Adjoint of EBM package + verification
1709      * TLM OK
1710      * ADM not sufficient accuracy yet (needs further testing)
1711    
1712    checkpoint53b_post
1713    o Commiting new energy balance model to repository
1714      * package is pkg/ebm
1715      * verif. is verification/global_ocean_ebm
1716      * references are in ebm_driver.F
1717    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1718    C        Global thermohaline circulation. Part I:
1719    C        Sensitivity to atmospheric moisture transport.
1720    C        J. Climate 12(1), 71-82
1721    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1722    C        Global thermohaline circulation. Part II:
1723    C        Sensitivity with interactive transport.
1724    C        J. Climate 12(1), 83-91
1725    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1726    C        Destabilization of the thermohaline circulation
1727    C        by atmospheric eddy transports.
1728    C        J. Climate 7(12), 1870-1882
1729    o Will need long integration testing.
1730    checkpoint53b_pre
1731    
1732    o created pkg/mom_common in preparation for variable viscosity code
1733    o renamed and split ini_mnc_io
1734    o pkg/land: only liquid water can diffuse or run-off
1735    o AIM using land: soil wetness availability account for snow
1736    o added printMapIncludesZeros to EEPARMS namelist
1737    
1738    checkpoint53a_post
1739    o restore TAMC compatiility for exf_constants.h
1740      (no usage of _d in .h)
1741    o Additional storing in KPP in an attempt to fix
1742      TAMC problem with adjoint of KPP code.
1743      (no success...)
1744      Identical code works fine with TAF.
1745    o Fixed verification/natl_box_adjoint experiments.
1746      Initial conditions for Experiments 4 and 5 are now
1747      set to "SEAICE_initialHEFF=0", which is more reasonable,
1748      and hence gives results closer to that of Experiment 2.
1749      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1750    
1751    checkpoint53
1752    o stable checkpoint with up to date adjoint
1753      TLM tests only run for 1st grdchk at the moment. Its unclear if
1754      this is a code problem or a problem with resetting code for g_
1755      variables that is being autogenerated wrong.
1756      Otherwise:
1757       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1758       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1759         are both still in chaos following their security messes.
1760    
1761    checkpoint52n_post
1762    o various build (mostly genmake2) changes including:
1763      - ability to build/run more easily within Cygwin and MacOS X
1764      - more complicated Makefiles with a stronger dependence on Gnu Make
1765    o pkg/seaice modifications
1766      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1767        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1768        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1769      - changed proxy for geostrophic velocity and updated
1770        verification/lab_sea/results/* accordingly
1771      - removed ADI dynamic solver from pkg/seaice
1772      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1773        they caused a segmentation fault under certain circumstances
1774      - removed unused field WATR
1775    o bug fix in exf-package:
1776      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1777         now reflect that.
1778    o small fixes in the cal-package:
1779      - set reference date to first of January for the 'model'-calendar
1780      - failing of cal_CheckDate in cal_FullDate now actually results in a
1781        warning
1782    o small modifications in exf-package to increase flexibility:
1783      - change climtempfreeze from a constant to a runtime parameter that
1784        is specified in data.exf_clim (default = -1.9)
1785      - introduce runtime parameter windstressmax (default = 2.0) that is
1786        specified in data.exf
1787    o fix in pkg/thsice:
1788      - update Evap (Tsf changes) to be consistent with Latent heat flux
1789      - maintain snow precipitation unchanged (even if Tsf >=0).
1790     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1791    
1792    checkpoint52m_post
1793    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1794      this does not change any of the results, because myIter=0 in swfrac always
1795      lead to jwtype=2 (the default anyway), but the call makes little sense
1796      as a default
1797    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1798    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1799      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1800    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1801    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1802    o extending useSingleCpuIO option to work with new exch2 I/O format
1803      - old-style, missing-tile I/O is still accessible by defining CPP
1804        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1805    o monitor package can write to NetCDF files and/or STDOUT
1806    o fix re-definition bug in MNC_GRID_INIT_ALL()
1807    o doc/api_reference added
1808      - a framework for building an API Reference Manual using all
1809        the "protex" comments embedded in the code
1810      - see pkg/generic_advdiff, pkg/mnc for examples
1811    o MNC:
1812      - make myThid the last argument for all subroutines
1813      - new default for the grid files: NO halos
1814      - add useMNC and other run-time flags
1815      - separate per-file-group handling of the unlimited dimension
1816      - early initialization of MNC w/ flags read at the eeboot stage
1817        and lookup tables set in initialize_fixed
1818      - write all MNC output to a freshly-created directory
1819    o thermodynamics sea-ice (thsice) is now tested with testreport.
1820    o test exp. advect_cs: use the standard cs32 grid ; update output.
1821    o Added functionality to grdchk:
1822      pick global i,j,k position (or nearest wet) where to perform check.
1823    
1824    checkpoint52l_post
1825    o new land formulation:
1826      a) use ground enthalpy as prognostic variable to ensure exact
1827         energy conservation.
1828      b) account for water temperature and for latent heat of freezing
1829         in all processes (rain, run-off, ground storage)
1830      c) compute surface and ground temperature implicitly.
1831    o aim_v23 modification for new land model:
1832      a) Treat separately land / ocean / sea-ice surface fluxes
1833         to allow implicit computation of land & sea-ice surface temp.
1834      b) add snow precipitation.
1835    checkpoint52l_pre
1836    
1837    o fix problem (when 1 tile is empty) in min/max monitor.
1838    o fix bug in timeAve (u,vZetatave in common block)
1839    o no restoring terms under ice for pkg/seaice
1840    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1841    o bug fix for pkg/seaice pickups
1842    o change MNC call locations and add coordinate attributes
1843    o mask vorticity at the corner ; affects global_ocean.cs output
1844    o fix ini_curvilinear_grid ; test CS experiments with mpi
1845    o aim.5l_cs: modify sea-ice fraction input file ; update output
1846    o exf: Adding simple range check routine for exf fields after read
1847    
1848    checkpoint52k_post
1849    o removed top-level directory "diags"
1850      - we migrated these functions to pkg/timeave a long time ago
1851    o fixed bug introduced in pkg/monitor
1852    o accuracy ctrlprec = 32 insuffient for gradient checks using
1853      averaged fields (I/O via cost_averages)
1854      -> use ctrl.h in active_file*.F to control I/O precision.
1855    o paramter list of CALL ADTHE_MAIN_LOOP
1856    o added initial do_the_model_io to ecco
1857    o set all ...Freq to zero after cost_final
1858      taveFreq, dumpFreq, pChkptFreq
1859    o MAIN and ECCO differentiability restored
1860    
1861    checkpoint52j_post
1862    o fix nchklev in tamc.h for global_ocean...
1863    o Bringing flow and store directives up-to-date
1864    o Really weird thing!
1865      call do_the_model_io from the_main_loop with parameters
1866      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1867      TAF places a faulty re-call of initialise_varia
1868      after cost_final call which should not be there!
1869    checkpoint52j_pre
1870    
1871    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1872      error messages
1873    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1874    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1875      debug output
1876    o modfied mdsio_writefield.F to handle non-global files under exch2
1877    o update AIM Cubed-Sphere exp (aim.5l_cs):
1878      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1879    o update AIM Equatorial Channel exp:
1880      use standard aim_v23 pkg and change the SST fields to be more realistic.
1881    o globalFile now works with exch2
1882    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1883      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1884    o limit timeave output for hi-res integrations
1885    
1886    checkpoint52i_post
1887    o removed CPP_EEOPTIONS.h from verification/*/code
1888    o updated the tiling for global_ocean_pressure
1889    checkpoint52i_pre
1890    
1891    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1892      the old pkg/aim).
1893    
1894    checkpoint52h_pre
1895    o shortened offending lines in exch2_send_rx?.template
1896    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1897    o genmake2: add build & execute test for NetCDF code
1898    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1899      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1900    o added useSingleCPUIO flag to monitor.F and mon_out.F
1901    o added temporary hack for sea-ice dynamics on the cube:
1902      metric terms are ignored and it is assumed that
1903      there is no sea-ice on cube faces 1, 2, 4, and 5.
1904    
1905    checkpoint52f_post
1906    o added exch2 cube routines to pkg/exch2
1907    o modified hs94.cs-32x32x5 to use it
1908    o added new grid files to hs94.cs-32x32x5
1909    checkpoint52f_pre
1910    
1911    checkpoint52e_post
1912    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1913      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1914    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1915      to work with implicit vertical advection and AB ;
1916    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1917    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1918     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1919    checkpoint52e_pre
1920    
1921    o fix bug in impldiff when Nr=1 or Nr=2.
1922    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1923    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1924    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1925      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1926    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1927    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1928    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1929    
1930    checkpoint52d_post
1931    o re-tiled many expts to allow comparison in multi-processor mode
1932      - updated output accordingly
1933      - changed hs94.128x64x5 to use intial T from file rather than use the
1934        random number generator
1935    o add infrastructure in model routines for fizhi and gridalt packages
1936    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1937    o changes to permit hi-res, cubed-sphere, configuration
1938      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1939      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1940      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1941        of surface winds for the cube
1942      (A verification experiment, based on global_ocean.cs32x15, but with
1943       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1944       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1945       complete with example surface forcing files and matlab scripts to look
1946       at the output and compare it with that of global_ocean.cs32x15.)
1947    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1948       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1949       to conform to the common rule.
1950    o check-in the first version of the coupler + interfaces for multi-components
1951       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1952       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1953       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1954       - ocean and atmos. share the same horizontal grid (no interpolation).
1955       - exchanges between component and coupler is done in forward_step
1956    o new verification experiment, cpl_aim+ocn:
1957       coupled ocean - AIM atmosphere on cs32 grid.
1958    
1959    checkpoint52d_pre
1960    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1961    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1962    
1963    checkpoint52c_post
1964    o Fixing OPTIONS files for use of exf:
1965      - ALLOW_ECCO not needed
1966      - ECCO_CPPOPTIONS.h should not be included from
1967        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1968        as has been the case in the past
1969      - All cal/exf related options are currently set in
1970        single header file. Should remain so until we
1971        agree on a consistent new policy.
1972    o Removed all CPP options for cal package.
1973      cal has no more CPP options.
1974    o modified STOREs in GAD_ADVECTION
1975    o corrected key comp. for passkey
1976    
1977    checkpoint52b_post
1978    o new version: "thsice" of thermodynamic sea-ice pkg:
1979     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1980     - modify fluxes but do not change theta directly;
1981     - light cleaning of bulk_force pkg (still needed with thsice).
1982     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1983       + output_thsice.txt to test thsice & bulk_force pkgs.
1984    o put back grid & coriolis monitor output.
1985    checkpoint52b_pre
1986    
1987    o call "do_the_model_io" at the beginning (=> dump initial state)
1988    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1989    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1990      (need info on NUMBER_OF_PTRACERS)
1991    o missing PTRACERS headers in some routines
1992    o default tamc.h in pkg/autodiff supposed to crash
1993      to ensure proper customization
1994    
1995    checkpoint52a_post
1996    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1997      - moved surfaceTendencyTice from pkg/seaice to main code
1998      - subroutine FREEZE_SURFACE now limits only surface temperature
1999        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2000        => new output.txt for global_ocean.cs32x15 & global_with_exf
2001      - keep the old version of FREEZE for backward compatibility;
2002        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2003      - corresponding modifs for TAF directives
2004    o added surface flux output variables to TIMEAVE_STATVARS
2005    o time-averaged output for pkg/ptracers
2006    o fix problem with ECCO-related divided adjoint
2007      snapshot file was missing some ad-variables,
2008      but no warning issued by TAF
2009    
2010    checkpoint52a_pre
2011    o some bug fixes for #undef REAL4_IS_SLOW
2012    
2013    checkpoint52 = ecco_c52_e35
2014    o after testing adjoints of checkpoint51u_post
2015    
2016    checkpoint51u_post
2017    o this is the post-merge tag of the ecco-branch
2018      (needs another clean checkout and re-testing)
2019    o various natl_box_adjoint configs and results
2020      but no input fields
2021    o obcs adjoint not yet merged!
2022    o adding ECCO global 1x1 and 2x2 degree configs
2023    o updated/extended some store directives for seaice
2024    o pkg/ecco now containes ecco-specific part of cost function
2025    o top level routines the_main_loop, forward_step
2026      supersede those in model/src/
2027      previous input data.cost now in data.ecco
2028      (new namelist ecco_cost_nml)
2029    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2030    
2031    checkpoint51t_post
2032    o this is the pre-merge tag of the ecco-branch
2033    
2034    checkpoint51s_post
2035    o cleanup: removed various obsolete #define-s
2036    o pkg/grdchk
2037      - renamed 'ph-grd 3' to 'grad-res'
2038      - merged from ecco-branch
2039        (remaining bug fixes for obcs gradient checks)
2040      - additional high-precision output for testreport
2041        (grep for 'precision_grdchk_result')
2042    
2043    checkpoint51r_post
2044    o cleaned up or removed CPP_OPTIONS.h files
2045    o updated results for some of the tests to reflect the new
2046      optfiles (-ieee: -O0 instead of -O3)
2047    
2048    checkpoint51q_post
2049    o cd_code:
2050      - moved cd_scheme.F -> cd_code_scheme.F
2051      - separate read_checkpoint from cd_code_ini_vars.F
2052      - separated cd_code part from write_checkpoint
2053      - updated AD_SOURCE, generated .flow
2054      - added CD_CODE_VARS.h to the_main_loop
2055      - Moving cd_code specific store dir.s to pkg/cd_code
2056    o ctrl package totally restructured
2057      - pack/unpack now optional and decoupled from
2058        xx_/adxx_ I/O
2059      - ctrl_pack/unpack cleaned
2060        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2061      - confined inclusion of AD_CONFIG.h to where necessary.
2062    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2063    
2064    checkpoint51p_post
2065    o create initial cd_code package
2066      - WARNING: the initialization of fields within packages
2067        is broken because INI_FIELDS (where READ_CHECKPOINT is
2068        called) is called *before* PACKAGES_INIT_VARIABLES.
2069        This seems to be backwards since
2070        1) its important to initially zero the entire field including
2071           the "halo" region
2072        2) zeroing needs to be done *before* reading pickup info
2073           and the pickup call might or might not happen in any
2074           particular run
2075      - this needs an overhaul for R2
2076    o cleanup verification/*/code/GMREDI_OPTIONS.h
2077    o cleanup testreport
2078    
2079    checkpoint51o_post
2080    o bringing AD-related verif's up to date with genmake2
2081      - carbon/
2082      - global_ocean.90x40x15/
2083      - hs.94.1x64x5/
2084      - (front_relax/ )
2085    o (more) consistent directory structure for AD-related verif.'s
2086    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2087    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2088    o bug fix in find_alpha.F for MDJWF:
2089      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2090        change rho -> rho-rhoConst
2091      - replace call find_rho to find_rhonum
2092    o initialisation of rFlx extended to full array (required by TAF)
2093      and shifted to thermodynamics
2094    o removed PTRACERS.h in ptracers routine
2095    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2096    o Correcting initialisations for fVerU, fVerV.
2097    o helping TAF to recognize dependency on kUp for
2098      fVerU, fVerV
2099    o Replacing delZ by delR in pkg/ctrl/
2100    checkpoint51o_pre
2101    
2102    o undid all of cp51 pending some cleanups and discussion
2103    o added the [#include "AD_CONFIG.h"] statement to all files that need
2104       it for adjoint/tl #defines
2105     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2106     o removed tools/genmake since it no longer works
2107    
2108    checkpoint51n_post
2109    o modifications to make FREEZE flux visible to pkg/kpp
2110      - moved surfaceTendencyTice from pkg/seaice to main code
2111      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2112      - subroutine FREEZE now limits only surface temperature
2113        (this means new output.txt for global_ocean.90x40x15,
2114         global_ocean.cs32x15, and global_with_exf)
2115    o added surface flux output variables to TIMEAVE_STATVARS
2116    
2117    checkpoint51n_pre
2118  o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F  o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2119  o added [#include "AD_CONFIG.h"] to all files that use the following  o added [#include "AD_CONFIG.h"] to all files that use the following
2120    defines:    defines:

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