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revision 1.241 by dimitri, Thu Jan 15 03:38:22 2004 UTC revision 1.867 by mlosch, Fri Aug 31 14:06:57 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/seaice: change a discretization detail to make the B-grid code
8      "more symmetric". This change is likely to remove all "ridges/leads" that
9      where quasi-aligned with the grid in B-grid solutions. It may also be
10      the solution to the stress coupling issues with the B-grid.
11    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
12      remove .cvsignore from input dir. (since testreport no longer run here).
13    o pkg/thsice:
14     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
15     - fix reshaping of sea-ice just after advection:
16       melt all the ice only if ice-volume is too small.
17     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
18       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
19     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
20    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
21      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
22    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
23      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
24      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
25      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
26      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
27      -> update output.txt
28    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
29     this affects truncation error: -> update output.txt of exp:
30      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
31      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
32    
33    checkpoint59f
34    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
35    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
36      a bounded range (in forward mode)
37    o pkg/ecco, ctrl, autodiff and mom_common:
38     internal parameter controls, completements of implementations
39    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
40    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
41      (not seem any difference in testing results).
42    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
43       at face corners.
44    o pkg/generic_advdiff:
45     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
46      loop range indices for computing vertical advection tendency
47      and do the calculation in the interior only (no overlap) ;
48      for now, only implemented for SOM advection (to save CPU time).
49     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
50    o exch2 adjoint
51      First set of changes:
52      - add exch2 hand-written adjoint templates
53      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
54        This will require cleanup in pkg/autodiff/*.F
55        (changed routines currently kept separate in verif. code/)
56      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
57        that used to hide exch2 or cubed-sphere specific code
58        (commented via 'cph-exch2')
59    o pkg/seaice
60      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
61    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
62       output of global_ocean.cs32x15.thsice .
63    
64    checkpoint59e
65    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
66      for B-grid vector (not yet tested) and C-grid vector (<- only used
67      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
68    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
69      (#ifdef ALLOW_SALT_PLUME)
70    o gather_2d/scatter_2d: removed halo regions
71    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
72      scheme and the corresponding test case (under front_relax dir). For now,
73      only available with Skew-flux form and not yet tested in realistic set-up.
74      adjoint: store directives updated, but gradient checks deteriorated,
75      so maybe GM/Redi adjoint is now broken.
76    o seaice adjoint
77      * add AREA, HEFF, HSNOW as control variable
78        (should not change lab_sea results)
79      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
80    o pkg/seaice:
81      * added computation of saltFlux in seaice_growth;
82        For time being, sea ice salinity is assumed constant
83        contribution of snow flooding to freshening of sea ice is neglected.
84        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
85        defaults to 0.0 in order to maintain backward compatibility.
86        Typical values for SEAICE_salinity are 4 to 10 g/kg.
87      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
88      * added SEAICE_availHeatFrac, which specifies fraction of surface level
89        heat content used to melt or grow ice
90      * commented out cap of HICE: it helps keep ice thinner
91      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
92      * applied OBCS T/S mask to HEFFM sea ice mask
93    
94    checkpoint59d
95    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
96     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
97     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
98    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
99     and change default value of parameter "GM_Small_Number";
100     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
101       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
102       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
103    o pkg/ecco: cost function when applying pkg/smooth to controls
104    o pkg/ctrl: add forcingPrecond run time parameter
105    o pkg/seaice:
106     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
107     - fix bug in metric terms of u-equation in LSR solver (implicit part),
108       changes verification/lab_sea
109     - rearrange implicit part of u-equation in LSR solver to make it easier to
110       read, understand, and debug. This causes changes at the truncation level.
111     - fix (serious) bug in the boundary conditions (sign error in the implicit
112       part) of the LSR solver. Changes all LSR results.
113     - fixed problem with HSNOW initialization to avoid thick snow when AREA
114       is initilized with small values - does not change lab_sea results.
115     - added HsnowFile initialization capability
116    o pkg/smooth: addition to model/src and pkg/ctrl so allow
117     initialization of pkg/smooth and application to control vector
118    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
119    o dependencies: pkg/profiles requires pkg/cal
120    o pkg/profiles:
121     - added option ALLOW_PROFILES_GENERICGRID
122         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
123         that interpolation information (grid points and coefficients) is provided
124         within the netcdf input files.
125         -> sample matlab scripts can be found in MITgcm_contrib/gael
126         that allow you to prepare netcdf input files.
127     - also modified: cleaner include statements, cleaner error print statements,
128       cleaner stops when error, and more tests of the netcdf input files consistency.
129    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
130    o pkg/seaice:
131     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
132       requires a new routine: seaice_diagnostics_fill.F
133     - make sure that seaice does not move if not forced (pressure replacement
134       method, Hibler and Ip, 1995), changes results
135     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
136     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
137       It is turned off by default (=-1.), because it changes the results.
138     - make it possible to read AREA from a file, too.
139    
140    checkpoint59c
141    o add S/R and diagnostics for oceanic mixed-layer depth
142    o move GMRedi call after all vertical mixing schemes (including KPP)
143    o pkg/thsice:
144     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
145      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
146    o pkg/obcs:
147     - bug fix for balance code
148    o pkg/seaice:
149      - allow values of SEAICE_elasticParm > 1
150      - add new parameter SEAICE_evpTauRelax as an alternative
151        to SEAICE_elasticParm
152      - make lsr boundary conditions free slip (by default), changes result
153      - add code for no slip boundary conditions for lsr
154      - set minimum of zeta to zero (and not 4e8) (changes results)
155      - add a cap on AREA after advecting AREA if seaice_growth is not called
156    o change calculation of Visbeck K:
157      - no longer depend on tapering scheme; instead, compute slope (limited
158        by GM_maxSlope). this is equivalent to what was comuted before with
159        clipping or linear tappering.
160      - fix vertical averaging (wrong by 1/2 level)
161      - leave the old version (but will not be maintained) within
162        #ifdef OLD_VISBECK_CALC / #endif
163      - update output of exp. ideal_2D_oce
164    o change error catch in calc_r_star to improve vectorization
165    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
166      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
167    o adjoint:
168      Re-organized adjoint checkpointing according to Matt Mazloff
169      (but with modifs/completions/cleanups)
170      Storing is now bundled into large arrays to optimized I/O
171      (and second step in cleanup of the_main_loop)
172    
173    checkpoint59b
174    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
175      - export/import (between ocean & coupler) fields needed for ocean DIC.
176    o pkg/seaice:
177      - get rid of three more exchanges seaice_calc_viscosities (required
178        different loop boundaries in seaice_lsr and seaice_ocean_stress)
179      - bug fix in seaice_ocean_stress (update of lab_sea required)
180      - reduce loop boundaries to necessary minimum also in seaice_evp
181      - go back to the old way of computing deltaC/Z as the adjoint likes that
182        better
183    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
184      passive tracer to an Age Tracer) + update output.txt
185    o pkg/exf:
186      - implement A-grid / C-grid selection for wind-stress input files.
187      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
188      for now, in exf_bulk_largeyeager04.F only :
189      - change implementation for case where windspeed + 2. components wind-stress
190        are read-in. AND use rhoConstFresh to convert evap.
191    o pkg/seaice:
192      - use correct EXCH_UV for wind-forcing (on A-grid).
193      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
194        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
195    o pkg/exf:
196      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
197      EXF_INTERPOLATION:
198      - merge global_with_exf/code version of exf_interp_read.F
199        to the main code ;
200      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
201        reading the file ; Important: This options needs to be defined to recover
202        previous code.
203        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
204      - no longer loose real*8 precision along the way when using exf_iprec=64.
205    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
206      - change discretisation of evp-solver in order to avoid another exchange
207        (changes lab_sea) and clean up a little
208      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
209        help the adjoint (this also changes the results slightly)
210      - add a few "_d 0" where they had been missing in seaice_evp.F
211      - cleaning up: remove unused seaice_calc_rhs.F
212    o pkg/exf: some cleaning-up:
213      - change various "constants" into runtime parameters
214      - cleaned-up Large&Yeager04 routine which should eventually
215        replace exf_bulkformulae.F (changed names of S/R and CPP)
216        and merged various ALLOW_ATM_WIND options
217     only used with thsice pkg (in thsice_get_exf.F):
218      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
219        which are used when useStabilityFct_overIce=TRUE (= the default)
220      - change default values of ice & snow emissivity and scale downward LW
221        by ice & snow emissivity.
222    o pkg/thsice:
223     fix few little problems, in thsice_calc_thickn.F:
224      - growth vertically (and not laterally) if iceFrac == iceMaskMax
225      - melt only laterally if hIce < hThinIce (as the comments say)
226      and in thsice_extend.F:
227      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
228      - start to form ice as soon as the minimum ice-volume is reachable.
229     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
230      and cpl_aim+ocn
231    o pkg/kpp
232     - move computation of surface related input fields to KPP into a new
233       subroutine kpp_forcing_surf.F
234     - remove wrong (within bi,bj loops) EXCH calls.
235     - little cleaning (add argument myThid in last position, cvs header ...)
236     - for now, fix conservation problem by exchanging KPPviscAz (may not
237       be the best fix)
238    o pkg/seaice
239     - check for inconsistent evp parameter/cpp-flag combination
240     - remove leftover errIO flat for obsolete name list error handling
241    o OpenAD
242     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
243    
244    checkpoint59a
245    o pkg/seaice: some parameter clarifications and a little bit of clean up
246    o pkg/thsice: rename run-time parameters:
247       himin       -> hIceMin
248       himin0      -> hThinIce
249       hihig       -> hThickIce
250       i0          -> i0swFrac
251       transCoef   -> bMeltCoef
252       frac_energy -> fracMelting
253      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
254       with default values (for now) that do not change the results.
255      remove old version of thsice vars advection in pkg/seaice.
256    o in FFIELDS.h:
257      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
258      - make pLoad & sIceLoad always available (but still only used if
259         ATMOSPHERIC_LOADING is #define).
260    o pkg/kpp: replaced _KPP_RL with _RL
261    o bug fixes for vertical diffusivity computations when both KPP and
262        3D diffusivity arrays are used.
263    o pkg/seaice: fix bug in evp solver, while doing that
264      - change (improve?) discretization of stress computations for both
265        cgrid-lsr and evp solver
266      - add a new routine to compute strain rates
267      - the above changes lab_sea results
268      - add no slip conditions for evp solver (off by default), lsr-version
269        may follow
270      - fix exchange for shear at Z-points (does not change lab_sea)
271      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
272        (to force the user to pick a time step since there is not "safe" way
273        of choosing it)
274      - add principal stress diagnostics
275      - rearrange fields for evp a little to avoid having to call a: too many
276        exchanges and b: exchanges for stress trensor components which we do
277        not have.
278      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
279        of evp, complete rewrite for lsr case (latter is does not yet work
280        in all cases)
281    o pkg/kpp: add code to have mixing in shelf ice caverns
282      - add myThid to all kpp routines (long overdue)
283    
284    checkpoint59
285    o pkg/exf:
286      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
287        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
288      - move exf header files from lower_case.h to UPPER_CASE.h ;
289        add missing cvs Header & Name
290      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
291      - add namelist param. selectStressGridPosition, exf_monFreq
292      - retire many _CLIM routines, and remove data.exf_clim
293        + params moved to data.exf
294        + climsst, climsss now handled by exf_set_gen, i.e.
295          climss?period=0 refers to constant field,
296          climss?period=-12 to monthly forcing
297      - split up namelists in data.exf
298    o pkg/seaice:
299      - remove seaice_exch and seaice_exch_uv
300      - remove superfluous exchange of theta
301      - add myThid to seaice_budget_ocean/ice
302      - add new interface for atmospheric wind forcing (C-grid only)
303        + new routine
304        + two new field (taux, tauy for stress over ice)
305        + removed one global field (DAIRN) for C-grid case only
306    o pkg/thsise
307      - 2nd set of modifs for thsice adjoint in conjunction with exf
308    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
309    
310    checkpoint58y_post
311    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
312      vertical diffusivity, similar to that in MOM4; turned on using
313      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
314      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
315    o Added capability for 3D specification of background vertical diffusion
316      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
317      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
318      "data" file that contains the 3D vertical diffusivity coefficients.
319    o ice dynamics (pkg/seaice) with thsice thermodynamics:
320      - add code within pkg thsice to advect & diffuse sea-ice fields
321      similar to (and will replace) what has been added in  seaice_advdiff.F,
322      but: - conserving Mass, Heat & Salt.
323           - better when using non-linear advection scheme (not yet fully tested)
324           - can also be used in atmospheric set-up (for now, only the diffusion).
325    
326    checkpoint58x_post
327    o IO option for global-file compact format:
328      - add options when generating topology (utils/exch2/matlab-topology-generator)
329      - add I/O capability (pkg/mdsio).
330      - adapt utils/matlab/rdmds.m to read this format.
331      for now long-line format not yet supported by pkg/mdsio (& exch2).
332    o shelfice: add a few diagnostics
333    
334    checkpoint58w_post
335    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
336      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
337      (and replace horiVertRatio in NH code).
338      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
339                         and tutorial_plume_on_slope (sensitive to truncation)
340    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
341      directly to drive seaice model (C-grid only)
342    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
343     - reintroduce computation of wind from stress,
344     - compute tau (in exf_bulkformulae.F) from windstress averaged to
345       mass points to avoid tau = 0
346     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
347    o rdmnc.m: make it work with "global" files created with gluemnc
348    o rdmnc.m : some improvements in dealing with singleton dimension
349      (tested on all testreport mnc output files).
350    o genmake2: disable pkg/profiles if netcdf test fails.
351    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
352    o move call to cal_readparms up to make calendar parameters/variable available
353      to all packages
354    
355    checkpoint58v_post
356    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
357      useDynP_inEos_Zc tested.
358    o pkg/exf: changes to properly interpolate/mask/scale initial fields
359    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
360      and portions thereof.  See read_cs.txt for description and examples.
361    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
362      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
363      following the great-circle arc between those 2 points.
364    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
365      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
366    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
367     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
368     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
369     - still needs work (not working with some options ; efficiency to improve)
370       and serious testing.
371     - use this scheme for temperature & salinity in 2 advection test exp.:
372       advect_xy & advect_xz, respectively.
373    
374    checkpoint58u_post
375    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
376    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
377    o testreport: add option "-skipdir" to skip some test.
378    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
379      momentum calculation.
380    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
381    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
382      remove checkpoint.F and the_correction_step.F (no longer used);
383      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
384    o add option (linFSConserveTr) to correct for tracer source/sink due to
385      Linear Free surface
386    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
387    o pkg/thsice: fix reading mnc-pickups
388    
389    checkpoint58t_post
390    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
391    o pkg/mdsio:
392     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
393       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
394       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
395     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
396     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
397       either MDS_READ_FIELD or MDS_WRITE_FIELD )
398     - new S/R (to replace MDSWRITEMETA), which allows to write more
399       informations (variable names, time ...) to meta files.
400     - modify rdmds.m to give back the meta file content.
401    o pkg/diagnostics: change vertical interpolation to be safer, and more
402       flexible (define p-levels to interpolate to in data.diagnostics);
403      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
404       diagnostic pointer.
405    o pkg/seaice: more cleaning up of seaice_growth, added many comments
406    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
407    o fix multi-category seaice:
408     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
409       SEAICE_MULTICATEGORY
410     - fix short wave heat flux
411    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
412       and allow to use EVP solver. Change forward lab_sea: test both EVP
413       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
414    o Initial check-in of lab_sea adjoint
415      (very similar to natl_box_adjoint/code_seaice)
416      * used C-grid and EVP solver
417      * used KPP, GM/Redi
418      * uses inAdExact=.TRUE.
419      * gradient checks fail for both ADM and TLM
420        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
421        f.d. gradients actually seem more problematic than ADM, TLM gradients;
422        issue is related to forward mismatch between g77 an ifort
423    o pkg/seaice: overhaul of thermodynamics
424     - growth.F and groatb.F are replaced by new routine seaice_growth.F
425     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
426     - move a few global fields out of SEAICE.h into seaice_growth.F and
427       make them 2D (FICE/QNETO/ ...)
428     - remove FO (it is the same as QNETO)
429     - introduce a few local fields to avoid modifying external fields such
430       as atemp, etc.
431    
432    checkpoint58s_post
433    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
434      changed exf_set_gen.F so that
435        genperiod=0 means input file is one time-constant field and
436        genperiod=-12 means input file contains 12 monthly means
437    o CG2D: use pre-computed solver main-diagonal (stored in common block);
438      this affects truncation error ; generate new output file for exp. which
439      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
440        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
441        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
442        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
443        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
444        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
445    o start implementation of deep-atmosphere and anelastic formulation
446    o verification: remove 2nd copy of input files and use script "prepare_run"
447      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
448    o mom_common/vecinv/fluxform: fix a few initialisation isssues
449    o profiles: fix for multithreaded case
450    
451    o diagnostics: rename few diags:
452      s/'PRESSURE'/'RCENTER '/g
453      s/'TICE    '/'oceFreez'/g
454      s/'TAUX    '/'oceTAUX '/g
455      s/'TAUY    '/'oceTAUY '/g
456      s/'SWFLUX  '/'oceQsw  '/g
457      s/DIFx/DFxE/g
458      s/DIFy/DFyE/g
459      and add few ocean-forcing diagnostics:
460      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
461    o modifications to pkg/seaice/growth.F and budget.F, which change results of
462      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
463      as actual snow thickness.  It now refers everywhere to effective snow
464      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
465    
466    checkpoint58r_post
467    o modifications to pkg/seaice/growth.F, which change results of
468      lab_sea experiment: fixes pertain to melting snow over open water, to
469      masking EVAP under sea ice, and to using the correct AREA variable for
470      computations of EVAP, PRECIP, HSNOW, and GHEFF
471    o add ability to read bathy, salt, and theta using MNC (off by def)
472    o add flooding algorithm and advection of HSNOW for pkg/seaice;
473      both are turned off by default and do no change any results
474    o seaice advection with pkg/thsice: a step toward the use of non-linear
475      advection scheme, but #ifdef or commented out for now (requires more EXCH).
476    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
477      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
478      in natl_box (affects results @ truncation level: update output.txt)
479    o multi-threading and IO:
480      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
481      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
482        (needed to work with SingleCpuIO): tested in all verif. exp.
483    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
484      affects the results (but none of the verification test uses this scheme).
485    o Adding some pkg/diagnostics capability to pkg/seaice
486      (will certainly be subject to changes)
487    o ctrl: adding new control variables:
488      lwflux, lwdown, evap, snowprecip, apressure, runoff
489    
490    checkpoint58q_post
491    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
492      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
493      high_res_cube configuration by 4% on Columbia.
494    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
495      add (in global_with_exf/code) a version of EXF_INTERP_READ without
496      dynamical allocation (seems to work in multi-threaded).
497    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
498      single CPU io) so that TAF does not have to see EESUPPORT.h
499    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
500    
501    checkpoint58p_post
502    o obcs: stop if obcs is used with useCDscheme = .true.
503    o shelfice:
504     - fix a sign error so that no slip at shelfice interface works
505     - remove stop for combination non-hydrostatic code and shelfice. That does
506       not mean, that the results are correct, but at least they are numerically
507       stable
508    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
509    o added adjoint exch routined for all exch*3d* routines
510      and updated flow directives
511    
512    checkpoint58o_post
513    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
514      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
515    o change controling S/R for writing pickup file (new S/R do_write_pickup)
516      and clean-up reading/writing of pickup files.
517    o fix local version of read/write pickup (NH part) in rotating_tank/code
518    o simplify EXCH interface:
519     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
520     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
521    o added the regrid package
522    o shelfice:
523     - add a simple boundary layer scheme to reduce noise
524     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
525    
526    checkpoint58n_post
527    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
528       local variable (not in common block).
529    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
530      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
531      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
532        to work with SingleCpuIO.
533    o add "_d 0" to real constant of pkg/cfc subroutines ;
534       update exp. cfc_exemple & tutorial_cfc_offline output files.
535    o multi-threading and IO:
536      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
537        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
538      - barrier before and after reading.
539      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
540      - avoid using MDS_WRITELOCAL for LAND pkg output.
541      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
542        common-block variables ; Allows multi-threading with master-thread IO.
543    o change default MAX_NO_THREADS from 32 to 4 ;
544      and stop cleanly when MAX_NO_THREADS is too small.
545    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
546    
547    checkpoint58m_post
548    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
549       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
550    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
551       keep global_ocean.90x40x15 (for AD testing) with former secondary test
552       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
553    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
554        add MITgcm_tutorials (= code + all the tutorials)
555    o ecco, option to compute cost for total ssh (mean+anom)
556    o consistent with addition of ptracer and ssh in pkg/profiles
557    o profiles: adding ptracer and ssh
558    o testreport: change multi-test output-file name
559      (from output.txt.{name} to output.{name}.txt)
560    o profiles: now ok for mutli-tiles case
561    o seaice: add 4 parameters for different advection schemes for area,
562      (effective) seaice thickness, enthalphy, and snow height. Their default
563      is the standard parameter SEAICEadvScheme
564    o calc_gw:
565     - add cosFacU in zonal viscous flux (harmonic.visc.).
566     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
567       of tutorial_plume_on_slope.
568    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
569    o calc_gw: true flux-form, account for horizontal grid spacing.
570      update rotating_tank results, but not plume_on_slope (affected at
571      truncation level, 11 digits).
572    
573    checkpoint58l_post
574    o calc_gw:
575     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
576     - remove side-drag for now (need to fix it); update plume_on_slope results.
577     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
578    o commit code to make SST/SSS weights spatially variable
579      (based on either variable in-situ or variable initial T/S weights)
580    o pkg/ecco:
581      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
582        now based on horizontally varying weights wthetaLev, wsaltLev
583      * cost_averagesflags now returns year indices in addition to day, month
584      * sflux balance is performed on annual basis
585        (sflxumm, sfluxmm2, bal_sfluxmm)
586      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
587        including separate counting and multipliers
588    o pkg/rbcs
589      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
590    
591    checkpoint58k_post
592    o testreport:
593     - always build in dir. "build" (if not there, mkdir build instead of building
594       & running in input)
595     - run in dir run (if it exists), in build otherwise.
596     - call prepare_run (if input/prepare_run exists)
597     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
598    o pkg/exf modifications to interpolation and rotation routines for more
599       reasonable treatment of North Pole singularity: for tracers North Pole
600       value is set to northernmost zonal-mean value, for zonal velocity it is
601       set to zero, and for meridional velocity it is set to northernmost value.
602    o pkg/exf/exf_check_range.F
603     - add tile index to diagnostics and move stop statement to the very
604       end of the routine.
605    o pkg/diagnostics: (diagnostics_main_init.F)
606      define title of isomorphic variables according to the current config.
607    o pkg/thsice with pkg/seaice dynamics:
608    - fix domain of computation (interior only, required for exf) and do exchanges
609    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
610    o towards a standard way of dealing with multi-threading in MONITOR
611      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
612    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
613       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
614    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
615    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
616    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
617       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
618    o tracer advection:
619     - clean-up and simplify calc_common_factors.F
620     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
621       advection subroutine (but still not used within DST advection S/R)
622    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
623    
624    checkpoint58j_post
625    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
626      from file (collects calls previously in FORWARD_STEP)
627    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
628    o adjoint store dir. adjusted accordingly
629    o genmake2
630      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
631    
632    checkpoint58i_post
633    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
634      on wind stress (SEAICEstressFactor defaults to 1.)
635    o Total number of Timers is finite (<=40): comment out 2 non-essential one
636      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
637    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
638      on CS-grid: no longer loosing mass.
639    o exf & curvilinear-grid: no longer modify longitude xC & xG.
640    o pkg/ggl90: fix sloppy output and fix a bug
641    o pkg/seaice: added SEAICEuseEVPpickup parameter
642      - Set to false in order to start EVP solver with
643        non-EVP pickup files when using SEAICEuseEVP
644      - fix sign error in diffusion in seaice_calc_rhs
645    
646    checkpoint58h_post
647    * Modifications for bottom topography control
648      o replace hFacC by _hFacC at various places
649      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
650      o add non-self-adjoint cg2d_nsa
651      o update autodiff support routines
652      o re-initialise hfac after ctrl_depth_ini
653      o works for 5x5 box, doesnt work for global_ocean.90x40x15
654    * Adding verification for 5x5 box (4-layer) bottom topography control
655    
656    checkpoint58g_post
657    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
658       used for mean seasonal cycle, mean diurnal cycle); add an example
659       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
660    o pkg/ggl90:
661      - add parameter (minimum surface kinetic energy)
662      - fix bug (avoiding division by zero)
663    o couple pkg/thsice to pkg/seaice:
664      - modify advection in seaice to accomodate new scalar fields to be advected
665      - only muliDimAdection scheme work with seaice/thsice
666      - mapping of thsice-variables to seaice-variables, back and forth
667      - does not break the verification experiments, but does not give the
668        desired results either
669    o pkg/seaice
670      - make (default) second order advection a bit less confusing?
671    
672    checkpoint58f_post
673    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
674      to pkg/seaice):
675      - new routines thsice_map_exf and thsice_get_exf provide the interface
676      - add an additional formal parameter to thsice_solve4temp
677    o pkg/exf:
678      - add new fields wspeed, snowprecip (to be able to couple to thsice)
679      - correct Stefan-Boltzmann constant
680      - new parameter for longwave surface emittance
681      - separate some stuff from exf_bulkformulae into new routines  
682        exf_radiation, exf_wind
683      - add new parameters and constants: longwave emissivity for ocean, ice
684        and snow, evaporation parameters over ice
685      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
686        either wind from stress or stress from wind
687    o pkg/thSIce:
688    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
689    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
690       and THSICE_CALC_THICKN
691    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
692    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
693      to make debugging easier.
694    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
695    o pkg/bulk_force:
696      - clean-up comments and parameters ;
697      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
698    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
699      generate new output for test-experiment: aim.5l_cs.thSI
700    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
701      testreport accordingly
702    
703    checkpoint58e_post
704    o SEAICE_CGRID adjoint done
705    o R_STAR adjoint implemented.
706      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
707      * need to sort out init. of h0facc, etc.
708    o Make pkg/profile fully independent of ecco,cost, etc. stuff
709      to be able to use it in pure forward.
710    
711    checkpoint58d_post
712    o upgrade simple test-experiment to tutorial example:
713     step.1: duplicate the experiment and (step.2) will remove the old copy.
714      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
715      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
716      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
717      tutorial_global_oce_biogeo    <- copy of dic_example
718      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
719      tutorial_plume_on_slope       <- copy of plume_on_slope
720      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
721      tutorial_global_oce_optim     <- empty for now (David ?)
722      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
723     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
724    o correct a sign problem in cost_scat.F
725    o obcs and ptracers: fix boundary conditions for advections schemes
726      with larger stencil
727    o thsice adjoint: start
728    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
729      completeness
730    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
731      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
732    o ptracers adjoint:
733      * avoid extensive recomputatations
734      * fix missing re-init. of gptr (missed by TAF)
735    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
736      me to turn off the excessive output to STDOUT that this package produces
737    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
738      and add those terms in Vector-Invariant formulation.
739    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
740      if the control period (xx_hfluxperiod etc) is 0
741    o in profiles pkg, clean routines and fix details
742    o in ecco pkg, reading ssh data:
743      fix problem in case the model does not start at iter0=0
744    o fix mnc-pickup/restart for ptracers
745    o new package prifiles:
746      code to compute profile-based cost by Gael Forget
747      (modifs in ecco, ctrl, autodiff)
748    o Benign bug fix in initialization (spotted by M. Mazloff) of
749      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
750    
751    checkpoint58c_post
752    o adjoint: finish NLFS adjoint and provide reference output in
753      verification/global_ocean.90x40x15/results_ad_nlfs
754    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
755      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
756      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
757      with SEAICE_CGRID defined.
758    o move calendarDumps from "data" to "data.cal" and clean-up the code
759      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
760    o add useEXF & useCAL flags (for now, set in hard-coded way)
761    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
762      (were missing in NH mode, and wrong in quasihydrostatic mode).
763      waiting for Chris updated version of calc_gw to add those CALLs.
764    o fix bug in quasihydrostatic S/R ;
765      add a test for this option: global_ocean.90x40x15.qshyd
766    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
767      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
768    o add on/off flag useOffLine for package OFFLINE
769    o seaice:
770      - modify advection so that it works also on the C-grid
771      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
772        problem in multi-tile runs with C-grid
773      - add flags for clipping ice velocities and/or masking solver forcing
774      - fix drag (ocean on ice) formulation and a bug that caused noise in the
775        C-grid solver
776      - added a few comments to seaice_diffusion.F
777      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
778        are now exclusive)
779      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
780        required re-ordering the code a little:
781       + make DAIRN global variable (defined in SEAICE)
782       + move computation of the viscosities eta and zeta into a new separate
783         routine (because I need to recompute them in seaice_ocean_stress.F)
784    
785    checkpoint58b_post
786    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
787      update output.txt of exp. aim.5l_cs.thSI
788    o various mnc cleanups and improvements:
789      + shrink lookup tables by factor of ~4
790      + better error reporting when running out of lookup space
791      + able to handle longer path/file names (up to 500 chars)
792    o adjoint:
793      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
794      - TBD: "hidden" mom_vecinv recomp. in dynamics
795    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
796     (allow to differentiate between forcing components using new integer flags:
797      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
798     and add new flag to put Dissipation tendency out of Adams-Bashforth.
799    o ecco
800      - enable trend removal from SSH anomaly obs.
801    o adjoint
802      - a fix for PmEpR when #undef EXACT_CONSERV
803      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
804      - try to fix "hidden" recomp. in forward_step for NLFS
805        (NLFS seems broken sometimes after I checked it in)
806    o seaice:
807     - add c-grid version of the dynamic solver:
808       + three new routines that are the c-grid substitute lsr, dynsolver
809         and ostres
810       + put a few fields that were local to dynsolver into global common
811         blocks, so that I can move the computation of stresses etc into
812         seaice_lsr (saves coding but may break the adjoint).
813     - replace more hardwired parameters by runtime parameters
814     - add ice masks that mask the rhs of the implicit solvers where there
815       is no ice (commented out in seaice_dynsolver, because i am not sure
816       if this works properly), eventually this should replace the clipping
817       of ice velocities in seaice_dynsolver to +/-40cm/s.
818    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
819      include it only where its needed
820    o move balancing of fluxes before the call of external_forcing_surf
821    o seaice:
822      - correct units of turning angles (now they are really in degrees)
823      - move computation of GWATX/Y out of main routine into dynsolver
824      - initialize GWATX/Y in seaice_init
825    o Apply mask on Fresh-Water flux (needed for SSH forcing).
826      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
827    o seaice: add runtime flags for turning angles (default to zero)
828    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
829      and trend from exf forcing and ctrl control adjustments
830    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
831      (since checkpoint57x_post)
832    o change the default rotation period to 86164.s = the Earth rotation
833    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
834      and based on a reference stratification. Tested within hs94.cs-32x32x5.
835    o seaice advection: add code for choosing between the default (2nd order
836      central differences) and multiDim advection schemes provided by
837      pkg/generic_advdiff
838    o seaice:
839      - removed all references to SEAICE_GRID.h fields from
840        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
841        (cubed-sphere configuration will change a little)
842      - grid computations in seaice_init are obsolete now.
843      - cleaned up code a little so that is easier to read (hopefully).
844      - added new (better?) discretizations of default advection and diffusion
845        (turn on with SEAICEuseFluxForm)
846      - replace 1 in 3d global fields by kSurface in growth.F
847      
848    checkpoint58a_post
849    o seaice:
850      - bug fix in advect.F
851    o shelfice:
852      - separate shelfice load anomaly from pload (breaks with time
853        dependent forcing), => introduce constant field shelficeLoadAnomaly.
854        Its default is 0., but it may be computed more cleverly from (unknown)
855        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
856        done offline. A good approximation of the pressure load anomaly is
857        necessary to avoid large initial adjustment processes underneath
858        deep-reaching shelfice.
859      - small fix in ISOMIP shelfice_thermodynamics
860      - add more sophisticated thermodynamics of Hellmer (1989), this is
861        now the default
862      - give a few constants more intuitive names
863    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
864      if bulk formulae are used in long integration (especially EmPmR). Turn
865      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
866      if balancePrintMean, the imbalance that is substracted is printed to
867      STDOUT.
868    o fix bug (typo) in obcs_apply_eta.F
869    o add a new package shelfice which enables us to model the circulation
870      underneath shelf-ice with draughts of hundreds of meters.
871     - works
872     - to do: + include improved thermodynamics
873              + check whether kSurfC (from model/inc/SURFACE.h) can be used
874                instead of new field kTopC
875              + can we use topoFile, Ro_surf and existing code in ini_depth.F
876                instead of new field R_shelfIce and new code in ini_depth.F
877                and ini_mask_etc.F?
878              + adjust vertical mixing schemes?
879    o seaice pkg:
880     - add a cpp-flag to include a simple formula for a salinity dependent
881       freezing point of sea water at the surface
882     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
883       meridional stresses are now different (and hopefully correct)
884    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
885       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
886       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
887    o pkg/diagnostics: add options and parameters for regional-statistics
888       diagnostics ; define regions by reading a region-mask from a file
889       (might add other options later)
890    o pkg/bulk_force:
891     - add option and parameters to use AIM surface-flux formulae.
892     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
893       others forcing fields (defined in PARM05, parameter file "data") are loaded
894       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
895     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
896     - use the right EXCH call for uwind,vwind (to work on CS-grid).
897     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
898       and parameters (note: calcWindStress replaces .NOT.readwindstress).
899     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
900    
901    checkpoint58
902    o add "--embed-source" option to genmake2 which, when the supporting
903      tools can be compiled (as determined by genmake2) will turn on the
904      embed_files package which then embeds the entire MITgcm source code
905      (*.[fFhc] + Makefile) used for the build within the executable
906      - requested by CNH but off by default
907      - adds a paltry <9MB to the mitgcmuv executable in most cases
908      - only writes the output when useEMBEDSRC in eedata is true
909    o clean up 3-dim. relaxation codes:
910      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
911      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
912      * Thanks to Tom Haine for testing!
913    
914    checkpoint57z_post
915    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
916      affects output (@ truncation level) of exp. plume_on_slope ; updated.
917    o fix the pickup behavior for obcs in combination with ptracers
918    o fix a bug in ptracers_external_fields_load
919    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
920      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
921    o transfered surface NH pressure to eta field (if exactConserv).
922    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
923         and update lab_sea output.txt file.
924    o completing 3-dim. relaxation code: additional term
925         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
926      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
927      * At compile time, in "EXF_OPTIONS.h" set
928          #define  ALLOW_CLIMTEMP_RELAXATION
929          #define  ALLOW_CLIMSALT_RELAXATION
930      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
931          tauThetaClimRelax3Dim = 15552000.0,
932          tauSaltClimRelax3Dim  = 15552000.0,
933      * 3 cases:
934          1) Use a constant-in-time 3-dim. field
935          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
936          3) Real-time relax. to time-evolving prescribed field
937    o Adding Laplacian-type smoothness constraint on
938      initial and boundary (forcing) controls (ic, bc)
939      * enable at compile-time via
940        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
941      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
942      * Absolute scale somewhat unclear so far
943      * no area weighting was included since no other cost term does so far
944    
945    checkpoint57y_post
946    First step for a NLFS adjoint
947    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
948    o new init. routines for calc_r_star, calc_surf_dr
949    o still need to deal with ini_masks_etc
950    o testreport seemed happy
951    checkpoint57y_pre
952    
953    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
954    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
955    o add new offset feature to offline pkg (plus minor cleanup)
956    o cfc fixes for final year of integration
957    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
958      be in GCHEM_OPTIONS).
959    
960    checkpoint57x_post
961    o fix testreport Pb in multiple test experiment.
962    o cleanup our namelist syntax in verification:
963      - make it more F95 standards compliant (some work still needed)
964      - allows the vast majority of our tests to work with gfortran
965    o Non-Hydrostatic:
966     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
967     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
968    o Allow to apply AB on T,S rather than on AB(gT,gS):
969     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
970     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
971       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
972     - need a "clever" read_pickup to restart from the other AB formulation
973    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
974    o remove some unused variables (reduces number of compiler warnings)
975    o adjoint
976      * Disable useVariableViscosity for adjoint for time being
977        (there are a number of extensive recomputations)
978      * Initialize certain variables needed for adjoint
979    
980    checkpoint57w_post
981    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
982                 fix the singleCpuIO RS version of MDSWRITEFIELD
983       and add a WARNING if using globalFiles=T with multi-processors.
984    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
985      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
986    o tracer advection scheme:
987      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
988       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
989       was not very convenient).
990      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
991       (further tests needed for the implicit DST & Flux-Limiter schemes).
992    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
993      and sRef for convenience, handy, when you want to initialize
994      ptracers in a large domain with a constant non-zero value. Also,
995      untangle ptracers_init.F a little.
996    
997    checkpoint57v_post
998    o change dome exp. to use variable viscosity in side-drag terms.
999    o remove all the files from the cfc_offline test since they are now
1000      incorporated into tutorial_cfc_offline which has been producing
1001      identical results for a few days of testing
1002    o add new parameter: sideDragFactor to enable half-slip-side BC
1003      and change side-drag S/R to use viscosity from mom_calc_visc
1004      (can switch back by setting sideDragFactor=0.); affects results at
1005      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1006       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1007    o vorticity & strain are now computed without masking, to account for
1008      no-slip-side BC in variable viscosity calculation ; mask is applied
1009      anyway later on, before computing advection/coriolis terms.
1010    o modify exp4 to test new obcs support for reading from external files
1011      and for passive tracers
1012    o fix behavior of ptracers_monitor when monitor output is written to a
1013      netcdf-file; still not independent of monitor.F (writes in the same
1014      file).
1015    o change default value of tRef (put a uniform, meaningful value for ocean
1016      & atmos) and initialize sRef (was missing, as Martin mentioned).
1017    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1018      to be proportional to enstrophy dissipation length.  Thus,
1019       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1020      This is now consistent with Smagorinsky and with the manual.
1021    
1022    checkpoint57u_post
1023    o OBCS and PTRACERS: add open boundary support for passive tracers
1024      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1025        OB-values from file; this is not different from the way theta and salinity
1026        are treated
1027      - however, Orlanski-radiation conditions are not supported, and the model
1028        will stop if you use pTracers and Orlanski at the same time.
1029      - beefed up the rountine obcs_external_fields_load: now only those open
1030        boundary values are overwritten with values from files for which there
1031        are really files, otherwise the OB-fields remain untouched. This makes
1032        it possible to use different OBs at different ends of the domain (as
1033        with EXF)
1034    o reduce number of exch calls in shap_filt (s2).
1035    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1036      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1037    
1038    checkpoint57t_post
1039    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1040    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1041      same truncation, independent of the face number: affects affects several
1042      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1043    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1044      note that biharmonic viscosity + no-slip was not tested in any experiment.
1045    o fix bug in non-linear free-surf side-drag ; generate new output for
1046      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1047    o make mnc honor the writeBinaryPrec flag for most kinds of output
1048    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1049    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1050      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1051    o add brackets in multi-terms sum to get same truncation, independent of
1052      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1053      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1054    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1055      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1056      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1057      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1058      Suggested values of viscosity parameters found in mom_calc_visc.
1059      Many new viscosity diagnostics available.
1060    
1061    checkpoint57s_post
1062    o Add clearing-house for viscosity calculations, mom_calc_visc and
1063      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1064      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1065      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1066      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1067      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1068      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1069      ViscAhStrain and viscAhTension are now retired.
1070    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1071    o In response to JMC's bug report, genmake2 now ignores any soft-links
1072      that it finds in the *current* directory when searching for files.
1073      Soft-links found in any other source directories will still work as
1074      they did before.
1075    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1076      a C routine to unlimit the stack size
1077    o mnc-ify pkg/aim snapshot vars
1078    o mnc-ify pkg/land as requested by Daniel
1079    o various changes to mnc including:
1080      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1081      - output can now be grouped so that all files within a group
1082          change the ITER portion of their names in lock-step together
1083      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1084          and works with both EXCH1 and EXCH2 (but needs more testing)
1085      - writing works for all verification test cases w/ g77 on Linux
1086    
1087    checkpoint57r_post
1088    o make MNC variable initialization happen earlier
1089    o add diagnostics for (almost) each term of the momentum Eq.
1090    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1091    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1092    o remove MINIMAL_TAVE_OUTPUT option ;
1093      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1094    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1095      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1096    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1097    o add time-dependent SST, SSS control
1098    o cost terms in ecco/ modularized (new cost_generic.F)
1099    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1100    o new infrastructure for seaice model vs. obs misfits in seaice/
1101      * driver from the_main_loop.F is seaice_cost_driver.F
1102      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1103      * gradient check in Exp. 6a of natl_box_adjoint/
1104    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1105      (see README file)
1106    
1107    checkpoint57q_post
1108    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1109    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1110      - bug was reported by Jean-Michel and Ian Fenty
1111    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1112      update exp. cpl_aim+ocn output.
1113    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1114      Needed for high-res. runs with large global files
1115      to be able to limit tapelev size
1116    o Changed some tests for adjoint:
1117      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1118      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1119      * global_ocean.90x40x15/ back to default 3-level checkpointing
1120    o Modifications to enable scripted COMMON to MODULE conversion
1121      * verification/OpenAD/code/ has necessary scripts and description;
1122      * converts, compiles and runs successfully;
1123    
1124    checkpoint57p_post
1125    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1126    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1127      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1128    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1129    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1130      (was already the case for dissipation with mom_vecinv,
1131       and also the case for grad.PhiHyd when staggered-timeStep)
1132      This will allow to put dissipation out-off the AB time-stepping.
1133     Unfortunately, affects truncation error. Update output of exp. that "fails"
1134      (cg2d matching number) and leave the others for later: front_relax(10),
1135      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1136      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1137    
1138    checkpoint57o_post
1139    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1140      (2) its ready to be documented during the 20050801 DocFest
1141    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1142      for ideal_2D_oce and lab_sea on linux_ia32_g77
1143    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1144      in global1x1_tot/code_seaice_adj to access indices 32, 33
1145      (worth another tag)
1146    
1147    checkpoint57n_post
1148    o adding precip control xx_precip 32
1149    o adding swflux control xx_swflux 33
1150    o Replacing 10 forcing penalty cost routines by 1 generic.
1151    o Implementing partitioning in time-mean and variable adjustment
1152      for atmos. state.
1153    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1154    o in natl_box_adjoint:
1155      * updated exp 1 to 10
1156        (but does not have time-mean vs. variable split results yet)
1157    o updated global1x1/*_seaice_adj/
1158      to incorporate latest changes
1159    o enable useSingleCpuIO for mdsio vector routines
1160      (applies in particular to tapelev I/O)
1161    o removed inefficient K-loop in all active_file*control*.F
1162    
1163    checkpoint57m_post
1164    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1165      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1166    o pkg/exch2: filling of face-corner halo regions is optional
1167      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1168    
1169    checkpoint57l_post
1170     tag before updating tutorials (pre-release-2)
1171    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1172       for output and interpolation of input fields onto model grid)
1173    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1174       Affects results of exp. rotating_tank ; update output.txt.
1175    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1176          and taking the square quantity and/or using a fraction-weight field.
1177    o fix aim_diagnostics_init.F mate numbers.
1178    o add mnc output capability to diagnostics/diagstat and update
1179      our cvsignore files for the ACSII output generated
1180    
1181    checkpoint57k_post
1182    o lab_sea now uses diagnostics package and provides a suite of
1183      new EXF diagnostics output.
1184    
1185    checkpoint57j_post
1186    o exf
1187      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1188        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1189        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1190      * extended diagnostics output
1191        - now includes all EXF variables
1192        - hs, hl moved to common block
1193        - separate S/R for diagnostics, called after ctrl vector is added
1194        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1195        - EXFqnet contains true Qnet (i.e. includes qsw)
1196      * updated verif. lab_sea, global_with_exf
1197      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1198        to ensure that diagnostics sees a true EXFqnet
1199    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1200    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1201      several times with different frequencies.
1202    o mnc-ify the thsice package as requested by Daniel Enderton
1203      - the monitor--MNC output needs work
1204      - many attributes need to be added (most are currently blank)
1205    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1206      - many attributes need to be added (most are currently blank)
1207    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1208    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1209    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1210      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1211         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1212    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1213     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1214    
1215    checkpoint57i_post
1216    o Diagnostics package was changed: diagnostic allocation is now deactivated
1217      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1218    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1219      add 1rst Order upwind vertical Shear.
1220    o add a quick fix for A/B checkpointing in OFFLINE mode
1221    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1222      end-run around the C/Fortran linking horror in eesup/src/timers.F
1223    o added pkg/runclock: allows user to terminate run based on wall clock
1224    o added non-hydrostatic scaling parameter: nh_am2
1225    o pkg/my82: futile attempt to make results compiler-independent by adding
1226      some "_d 0", etc. no effect.
1227    o for mnc output, fill the 'T' coordinate var with myTime and create a
1228      separate 'iter' variable for iteration count
1229    o pkg/diagnostics:
1230      add new capability: output of Global/Regional & per-level statistics ;
1231      tested against monitor output (including land & thSIce) on various exp.
1232    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1233    
1234    checkpoint57h_done
1235      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1236      data.diagnostics, data.gchem, data.ptracers) is done.
1237    
1238    o pkg/diagnostics: prepare for Global/Regional statistics.
1239      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1240    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1241      and rename it: DIFFERENT_MULTIPLE
1242    
1243    checkpoint57h_post
1244    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1245    o pkg/diagnostics: change output frequency, now in seconds (instead
1246      of Nb of iterations). This requires to change data.diagnostics.
1247    checkpoint57h_pre
1248    
1249    o in mnc, let the user create the output dir if both mnc_outdir_date
1250      and mnc_outdir_num are false
1251    o add fflags() to pkg/diagnostics which allows one to specify, on a
1252      per-file basis, the file precision [default behavior is unchanged]
1253    o added diagnostics to pkg/kpp, including computation of mixed layer
1254      depth based on a temperature/density criterion
1255    o updated verification/natl_box to test the new pkg/kpp diagnostics
1256    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1257    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1258    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1259      not mnc -- this mistake was found by JMC and is now corrected
1260    
1261    checkpoint57g_post
1262    o add Adams-Bashforth 3rd Order time stepping:
1263      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1264      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1265    checkpoint57g_pre
1266    
1267    o make lambda[Theta,Salt]ClimRelax spatially varying
1268      (default remains spatially uniform constant based on tau)
1269    o added new control variables
1270      * init. uVel, vVel, etanN
1271      * lambda[Theta,Salt]ClimRelax
1272    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1273      (suggested by G. Forget)
1274    
1275    checkpoint57f_post
1276    o add parameter "baseTime" = model base time = time at iteration zero
1277      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1278      account for baseTime shift
1279    o move Coriolis arrays from PARAMS.h to GRID.h
1280    checkpoint57f_pre
1281    
1282    o mnc-ifying the seaice package
1283    o introduced an alternative length scale calculation for use in the limiting
1284      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1285    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1286    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1287      as well as grad(vort3).  Made it compatible with both approximate form
1288      for the cubed sphere and full form of these gradients.  Added flag
1289      useFullLeith to select between approximate and full form.  
1290    o add "d0" in getcon.F to reduce differences between compilers/platforms
1291      update output.txt of exp. fizhi-gridalt-hs
1292    o change port_rand funtion to allow to set the seed.
1293    o fix obscure MNC bug involving conversion between reals and integers
1294      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1295        new version is now more standards-compliant
1296    o adjoint-related modifications
1297      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1298      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1299      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1300    
1301    checkpoint57e_post
1302    o Adding eddy stress controls a la Ferreira et al.
1303    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1304    
1305    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1306      update output.txt of exp. fizhi-gridalt-hs
1307    o add more "Z" dimensions and associated coordinate vars to MNC
1308    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1309    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1310      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1311      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1312      months and years.  Requires pkg/cal.
1313    o diagnostics: add pickup functionality
1314      - off by default for backwards compatibility
1315      - current version only uses MDSIO -- MNC will be added
1316    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1317    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1318    
1319    checkpoint57d_post
1320    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1321    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1322      output from the diagnostics package
1323    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1324    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1325      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1326    o add coordinate variables to the MNC output from the diagnostics package
1327    o change MNC-flags default value: true when useMNC=TRUE
1328    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1329      the ability (off by default) to read the grid information using MNC
1330    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1331    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1332    o do snap-shot diagnostics at the middle of the time-interval (instead of
1333      at the end).
1334    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1335      new test for AIM with thSIce + slab-ocean
1336    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1337    o move state variable diagnostics to the beginning of the time step ;
1338      (note: still needs some work specially for snap-shot diagnostics)
1339      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1340    
1341    checkpoint57c_post
1342    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1343    o generate new output.txt files on faulks with g77 & the new -ieee option
1344    checkpoint57c_pre
1345    
1346    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1347      update output.txt of exp. global_ocean.90x40x15
1348    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1349      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1350    o add saltFlux(+File) forcing capability with periodicExternalForcing
1351    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1352    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1353    o improvements for the MNC output from DIAGNOSTICS:
1354      - correct handling of the unlimitied dimension
1355      - all dims now have associated coordinate variables
1356      - variables located at U, V, and Corner ("Z") points are now written
1357        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1358        *all* data points are output
1359    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1360    o added pkg/seaice/seaice_monitor.F
1361    o mdsio_readfield.F can now read files visible only to master MPI process.
1362    o pkg/seaice: some test code for ice-modified ocean stress
1363    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1364      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1365      spurious negative numbers for precipitation and humidity.  Will cause
1366      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1367    o pkg/ctrl/
1368      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1369        May be enabled via doPackDiag
1370      *  introduce z-scaling of
1371         + gradient (doZscalePack) and
1372         + control (doZscaleUnpack)
1373    o pkg/mdsio/
1374      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1375      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1376    
1377    checkpoint57b_post
1378    o simplify options in diagnostics_fill arguments (remove weird combinations)
1379    o fix MNC coordinate variables so that they now contain per-face index
1380      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1381      general, EXCH2 grids are only aligned to a "local" coordinate system
1382    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1383    o Implement instantaneous output within pkg diagnostics:
1384      setting a negative frequency in data.diagnostics produces
1385     "snap-shot" output (as opposed to time-average if freq > 0)
1386    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1387      NOTE: change ptracer diagnostics name: use 2 characters to work with
1388            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1389    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1390      becomes the coordinate variable for the 'T' dimension
1391    o add CF-style coordinate variables to MNC
1392      - just a first cut:  numbers are meaningless on the cubesphere and
1393        missing along the T axis but otherwise it works!
1394    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1395    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1396    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1397      this is based directly on what the model compute, so that the content of
1398      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1399    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1400    o clean up build options files for SunOS, in particular
1401      - remove -traditional from xmakedepend
1402      - change -xarch=v9 to -xarch=native for f77
1403      - restore use of make (not gmake)
1404      - add CC=gcc if using g77
1405    o changes per discussion of AM, JMC, & EH3 today:
1406      - move redundant "grid" variables out of "state" -- in preparation of
1407        creating proper CF-style coordinate variables and in recognition
1408        that any/all grid variables can be easily copied (eg. w/NCO) from
1409        the grid files into any of the other NetCDF files
1410      - *always* output grid variables with MDSIO (this will eventually be
1411        changed)
1412      - output MNC grid file if useMNC is true
1413    o every instance of _END_MASTER() has been found and replaced with
1414      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1415      preprocessors
1416    o re-arrange diagnostics pkg initialisation:
1417     - allow each package to extend the available diagnostics list
1418     - add some checking and fix small problems (multi-threaded, ...)
1419     - new S/R diagnostics_fill (replace fill_diagnostics):
1420       look through the short list of active diag. (instead of the long list)
1421       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1422    
1423    checkpoint57a_post
1424    o this set of changes restores TAMC compatibility
1425      tested for global_ocean.90x40x15 adjoint on trough
1426      (what a pain)
1427    
1428    checkpoint57a_pre
1429    o some modifs in tools/build_options for sunos
1430    o call ctrl_pack for ctrl at end for optimcycle=0
1431    
1432    checkpoint57
1433    o add horizontal bi-harmonic viscosity for vertical velocity
1434      - new parameter viscA4W (defaults to viscA4)
1435      - affects only non-hydrostatic code
1436      - to be done: no-slip lateral boundary conditions
1437    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1438    o implement Implicit Vertical advection for pTracers
1439    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1440      (implemented also for implicit vertical diffusion & advection)
1441    o OBCS: extend application of tracer open boundary conditions
1442      to a strip beyond the boundary of width Olx/Oly
1443    o add call monitor to TAF set of required calls (flow directives)
1444      and include in natl_box_adjoint
1445    o untangle a few ifdefs related to cost, ctrl, autodiff
1446      untangel a few ALLOW_ECCO_OPTIMIZATION
1447    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1448      (theta2, salt2 in ecco_cost_weights)
1449    
1450    checkpoint56c_post
1451    o OBCS as control variables
1452      - update ctrl_ad_diff.list, obcs_ad_diff.list
1453      - remove balance of obcs controls from default
1454      - fix index bug nobcs in ctrl_init
1455      - fix dummy fields filen in ctrl_pack
1456      - add dummy weights for obcs
1457    o lsopt: comment out fort.94 output
1458    o optim:
1459      - remove unnecessary header files
1460      - adjusted namelists
1461      - add xerbla.F to Makefile
1462    o exf:
1463      - multiple modifications of exf_check_range
1464      - unit change in exf_init_runoff from [m/year] to [m/s]
1465    o mdsio:
1466      - i/o-vector change debugLevel from debLevA to debLevB
1467    
1468    checkpoint56b_post
1469    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1470      is called from DO_THE_MODEL_IO
1471      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1472      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1473      - clean up PTRACERS_WRITE_TIMEAVE a little
1474    o add another verification experiment that tests both the cfc-pkg and
1475      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1476      reactive tendencies treated inline with regular timestepping
1477    o testreport previously did a lousy job of comparing small numbers, so
1478      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1479      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1480      testreport.
1481    o ptracers_monitor: bug fix for MPI
1482    
1483    checkpoint56a_post
1484    o GCHEM: finish reorganizating the package
1485      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1486        (introduces another 3D-array for each passive tracer, but only if
1487        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1488        gchemTendency is not needed because the timestep is done separately)
1489      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1490      - GCHEM is now---more or less cleanly---separate from PTRACERS
1491      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1492        so clear to me how that should be done in a general way.
1493    o CFC: improve formatting of output in CFC_ATMOS
1494    o PTRACERS:
1495      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1496        that ALL experiments with ptracers enable can be checked. This makes
1497        GCHEM_MONITOR obsolete.
1498      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1499        monitorFreq
1500      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1501    o add PTRACERS (PTR0[1-5]) to testreport output
1502    o exf_check_range:
1503      * default changed to .TRUE.
1504      * will check values for niter0 if debLevA, every timestep if debLevB
1505      * STOP in exf_check_range if 'out of range'
1506      * range chosen generous to allow for potential extema
1507      TBD: a version with stricter range
1508           permitted range would be runtime parameters
1509    o GMredi:
1510      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1511      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1512      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1513    o GCHEM:
1514      - move call to GCHEM_FORCING_SEP, so that it is now called before
1515        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1516      - introduced a useGCHEM runtime flag and applied it everywhere.
1517      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1518        this flag is now only visible within GCHEM-pkg routines.
1519      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1520        be replaced by a 3D array that is computed before thermodynamics; for
1521        this, the tracer ID iTracer had to be included into the parameter list
1522        of ptracers_forcing
1523      - set up forward_step to call gchem_forcing, that will replace
1524        gchem_forcing_int in ptracers_forcing
1525      - cleaning up
1526    o small cleaning of exch2: remove files that are also in eesupp/src
1527    
1528    checkpoint56
1529    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1530    o mnc: cleanup "full" files--fixes out-of-memory problem
1531    o ECCO-GODAE
1532      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1533      * fully merged and updated from SIO code
1534        windstress sign change affects
1535        - exf_inscal_[u/v]stress
1536        - sign of xx_tau[u/v] adjustments
1537        - signs in cost_scat
1538      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1539      * natl_box_adjoint updated and compressed
1540      * 2-level checkpoint switch added
1541        (tested in EXP. 1 of natl_box_adjoint)
1542      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1543    o SVD
1544      * first complete, non-hacked version for SVD calculations
1545      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1546        performed via direct access files admtlm_vector.it????
1547        (via ctrl_[un]pack)
1548      * optimcycle is used for ARPACK iteration counter
1549        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1550      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1551        and add linear transforms where necessary
1552      * controls are initial/final SST, SSS (can be extended; need to check
1553        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1554    o mdsio: filename info to both stderr, stdout
1555    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1556      from sign change
1557    
1558    checkpoint55j_post
1559    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1560      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1561    o add consistent build directories and .cvsignore files to verification
1562    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1563    o make all subroutines 30 or less characters in length for certain older
1564      compilers to work (a thorough search only turns up two routines in
1565      pkg/ptracers)
1566    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1567      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1568    
1569    checkpoint55i_post
1570    o change arrays for total vertical diffusivity (2.D if explicit,
1571      3.D if implicit) ; each ptracer uses its own background value.
1572    o added mnc/NetCDF output capability to ocn_compon_interf
1573      - added bits to verification/cpl_aim+ocn so that it can run on
1574        ITRDA and other clusters without the mpirun "-wd" option
1575    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1576      configuration
1577    o give MNC the ability to create additional files rather than
1578      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1579      - the default is just less than 2GB which is a practical limit
1580        on many systems
1581    o Compute the non-local term using either KPP vertical diffusivity (=default)
1582       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1583    
1584    checkpoint55h_post
1585    o add verification test "vermix"
1586    o remove all the *_ioinc flags and replace with the single global
1587      outputTypesInclusive flag
1588    o allow to set a vertical profile of vertical diffusivity for T & S
1589    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1590    o useMNC moved from data.mnc to data.pkg
1591    
1592    checkpoint55g_post
1593    o Renaming carbon AD experiments to comply with testreport conventions
1594    o Updating adjoint of Held-Suarez hs94.1x64x5
1595    o Fixing directives for non-ECCO forward_step, after ECCO directives
1596      have been fixed to avoid recomp. of do_oceanic_phys
1597      Works well for global_ocean.90x40x15,
1598      but recomp. issue remains for carbon
1599    o Updating adjoint output for natl_box_adjoint after
1600      pkg/ecco has been modified (see taga c55d_post)
1601    
1602    checkpoint55f_post
1603    o rename to timeave_init_fixed
1604    
1605    checkpoint55e_post
1606    o some delicate re-shuffle of store directives to avoid one
1607      extra call of do_oceanic_physics
1608      affects ecco_the_main_loop.F, do_oceanic_physics.F
1609      checkpoint_lev1_directives.h
1610    o NB: this may break global_ocean adjoint temporarily,
1611      but it is clear how to fix it. Will do later, need this now.
1612    
1613    checkpoint55d_post
1614    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1615    o ecco_cost_weights is modified to 1x1 runs
1616    o modifs to allow observations to be read in as
1617      single file or yearly files
1618    o enable to read exf forcing fields as either
1619      single file or yearly files (flag useExfYearlyFields)
1620    checkpoint55d_pre
1621    
1622    o switch between 2-level and 3-level checkpointing
1623    o add ability of MNC to write local and "partial" (eg. 2D slices where
1624      the full 3D field is never actually stored) arrays to NetCDF files
1625      with the correct (that is, the complete multi-dimensional) set of
1626      array indicies
1627      - used in mom_vecinv() to write the diagFreq output
1628      - tested (demonstrated) in verification/aim.5l_cs
1629    o further mnc-ification
1630      - add verification/lab_sea to the list with mnc setups
1631      - fix undefined mnc v-names in cd_code
1632      - add kpp to mnc output (both snapshot and timeave)
1633    o non-hydrostatic code
1634      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1635        in calc_gw.F
1636      - defaults to viscAh
1637      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1638        friction or Leith) in non-hydrostatic mode, as long as there is
1639        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1640    o pkg/cost
1641      extend simple cost functions to treat time mean quantities
1642      (T,U,V) via cost_accumulate_state from cost_tile
1643    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1644        be 2 times larger than the minimum size the advection scheme requires.
1645        now get a perfect conservation of salt in advect_cs test-exp (updated)
1646    o GGL90 (Gaspar's TKE mixed layer)
1647      - add horizontal diffusion of TKE, requires exchanges in
1648        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1649        default. In OPA there is no horizontal diffusion of TKE but the
1650        mixing coefficients are computed from a horizontal average of TKE of
1651        6 points or so. I think that diffusion has a little more physical
1652        justification.
1653      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1654        was in vain)
1655      - mask tke-variable in ggl90_init
1656    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1657    o fix biharmonic diffusion on CS-grid.
1658    o more obcs stuff
1659      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1660        for reading boundary values. This routine is called from
1661        obcs_prescribe_read
1662      - updated obcs_check
1663      - changed sponge layer relaxation parameter units for days to seconds
1664      - turned off sponge layer by default
1665      - changed argument list of OBCS_CALC to myTime+deltaTclock
1666      - fixed about 35 bugs in obcs_external_fields_load
1667    
1668    checkpoint55c_post
1669    o obcs stuff
1670      - new runtime flags useOBCSprescribe, useOBCSbalance
1671      - re-arranged obcs_calc
1672      - moved exf_getobcs to obcs_prescibe_read
1673        obcs_prescibe_read is called after ORLANSKI stuff
1674        and independent of it (executable can contain all).
1675      - updated obcs_check
1676      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1677        These may be necessary only if tangential velocities are
1678        prescribed at OB, not sure, needs testing.
1679    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1680      which simplifies the calls and passes the ifc check-bounds test
1681    
1682    checkpoint55b_post
1683    o add a 2D scalar, Z location, exchange_2 routine.
1684    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1685      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1686      affects advect_cs results (for the wrong reason): update output.txt
1687    o use a more standard discretization for biharmonic viscosity ;
1688     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1689      affects results of dome set-up: update output.txt
1690    o fix gad_advection.F (CubedSphere part), back to version 1.23
1691    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1692    
1693    checkpoint55a_post
1694    o merged code to
1695      * prescribe/read time-dependent open boundaries
1696        (works in conjunction with exf, cal)
1697      * sponge layer code for open boundaries
1698      * each boundary N/S/E/W now has its own CPP option
1699        (healthy for the adjoint)
1700    
1701    checkpoint55
1702    o up-to-date adjoint of previous breaks
1703      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1704      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1705      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1706      - carbon: * remove tr1-related adjoint verification
1707                * add ptracer as control variable
1708    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1709      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1710    
1711    checkpoint54f_post
1712    o in verification/carbin/ remove experiment related to
1713      ALLOW_PASSIVE_TRACER (array tr1 etc)
1714      code_ad/ input_ad/ results_ad
1715    
1716    o add two new packages
1717      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1718        + subject to optimization (memory)
1719      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1720        + subject to reordering (many GOTOs in the original code)
1721        + so far opps is called for every (i,j) point, and then operates in
1722          the vertical; one may want to reorder the scheme in order operate in
1723          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1724          fields)
1725    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1726      - all verification tests compile and run with linux_ia32_g77
1727      - defaults are compatible with current input files--nothing
1728        should change if you were not previously using MNC
1729      - MNC output has been added in numerous places (eg. timeave)
1730        but there are still a few writes not yet do-able with MNC
1731        (this is in progress)
1732      - flags now allow for either/or/both use of MDSIO and MNC and
1733        documentation will soon follow
1734      - numerous small formatting cleanups for ProTeX
1735    o add version info (via BUILD_INFO.h) to MNC and stdout
1736    
1737    checkpoint54e_post
1738    o add two new packages
1739      - pp81 (Packanowski and Philander, 1981), Richardson number and
1740        stratification dependent mixing
1741      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1742      - these scheme operate in a similar manner as KPP (without ghat, of
1743        course), however there is only one diffusivity that is used for both
1744        temperature and salinity (and passive tracers)ç
1745    o add offline package
1746    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1747      provided by Stephanie Dutkiewicz
1748    o genmake2: add ability to search for C compilers and cleanup test output
1749      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1750    
1751    checkpoint54d_post
1752    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1753    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1754      leading to additional shift by 5 days each year of integration
1755       (i.e. leading to considerable offset over the years)
1756    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1757    o start with no AB and no initial filtering (staggerTimeStep):
1758      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1759    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1760      (external loading & cpl import/export stay in forward_step.F)
1761    o update coupling interface to work with new staggerTimeStep
1762    o change MDSIO ptracers_pickup.
1763    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1764    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1765    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1766    
1767    checkpoint54c_post
1768    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1769      this affects (truncation error) output.txt of test-exp:
1770       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1771    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1772    o change Qnet to always be the net heat flux, (+upward).
1773      affects (truncation error) output of natl_box exp.: updated
1774    o define the max number of passive tracers in PTRACERS_SIZE.h
1775    o start to test mnc routinely in exp0
1776    o add sea-ice loading (sIceLoad) as a new forcing field.
1777    
1778    checkpoint54b_post
1779    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1780       impressive on Altix and Opteron systems)
1781    o diagnostics can now write NetCDF files through the mnc package
1782    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1783    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1784    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1785      affects (truncation error) output of lab_sea & natl_box exp.: updated
1786    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1787    
1788    checkpoint54a_post
1789    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1790    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1791    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1792    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1793      + internal_wave (shift in writing cg2d_ini_res)
1794    checkpoint54a_pre
1795    
1796    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1797      - modified verification/lab_sea and natl_box_adjoint accordingly
1798    
1799    checkpoint54
1800    checkpoint53g_post
1801    o prepare splitting of thermodynamics: store convect.counter in common block
1802    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1803      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1804    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1805    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1806    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1807    o restore adjointability
1808    
1809    checkpoint53f_post
1810    o modifications that affect AIM experiment results (update output.txt):
1811      - no advection of S at top interface Nr (pkg/generic_advdiff)
1812      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1813    o AIM pkg:
1814      - include stability function into surf.Flux derivative relative to Tsurf
1815      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1816    
1817    checkpoint53e_post
1818    o merged cylindrical coord configuration
1819    o added rotating_tank experiment
1820    checkpoint53e_pre
1821    
1822    checkpoint53d_post
1823    o faulks upgraded: re-generate output.txt that have changed:
1824       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1825    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1826    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1827    o added Sadourny discretization of Coriolis
1828      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1829      - re-enabled use of omega3 (useAbsVorticity)
1830    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1831      vector-invariant equations
1832      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1833    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1834      hopefully without new bugs
1835      - still to do: biharmonic friction for non-hydrostatic w
1836    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1837    o regenerated output for global_ocean_ebm (using -ieee)
1838    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1839      of mom_common/
1840      - simple re-arrangement of instructions within computing loop
1841    checkpoint53d_pre
1842    
1843    checkpoint53c_post
1844    o new version of coupler for AIM+thSIce and Ocean models
1845     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1846     - land: change Evaporation of snow
1847     - aim with thSIce: fix bug in snow-precip.
1848    o changes to calc_gw.F
1849     - bug fix for w^2 term near the bottom boundary
1850     - (hopefully) improve the lateral slip boundary condtions for use with
1851        partial/looped cells
1852      - because the bug fix changes two verification experiments anyway (exp5
1853        and plume on slope), change the lateral boundary condition from half slip
1854        to the value of no_slip_sides
1855    o ebm package wasnt quite up to the parallel task. Fixed that.
1856    o Adjoint of EBM package + verification
1857      * TLM OK
1858      * ADM not sufficient accuracy yet (needs further testing)
1859    
1860    checkpoint53b_post
1861    o Commiting new energy balance model to repository
1862      * package is pkg/ebm
1863      * verif. is verification/global_ocean_ebm
1864      * references are in ebm_driver.F
1865    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1866    C        Global thermohaline circulation. Part I:
1867    C        Sensitivity to atmospheric moisture transport.
1868    C        J. Climate 12(1), 71-82
1869    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1870    C        Global thermohaline circulation. Part II:
1871    C        Sensitivity with interactive transport.
1872    C        J. Climate 12(1), 83-91
1873    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1874    C        Destabilization of the thermohaline circulation
1875    C        by atmospheric eddy transports.
1876    C        J. Climate 7(12), 1870-1882
1877    o Will need long integration testing.
1878    checkpoint53b_pre
1879    
1880    o created pkg/mom_common in preparation for variable viscosity code
1881    o renamed and split ini_mnc_io
1882    o pkg/land: only liquid water can diffuse or run-off
1883    o AIM using land: soil wetness availability account for snow
1884    o added printMapIncludesZeros to EEPARMS namelist
1885    
1886    checkpoint53a_post
1887    o restore TAMC compatiility for exf_constants.h
1888      (no usage of _d in .h)
1889    o Additional storing in KPP in an attempt to fix
1890      TAMC problem with adjoint of KPP code.
1891      (no success...)
1892      Identical code works fine with TAF.
1893    o Fixed verification/natl_box_adjoint experiments.
1894      Initial conditions for Experiments 4 and 5 are now
1895      set to "SEAICE_initialHEFF=0", which is more reasonable,
1896      and hence gives results closer to that of Experiment 2.
1897      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1898    
1899    checkpoint53
1900    o stable checkpoint with up to date adjoint
1901      TLM tests only run for 1st grdchk at the moment. Its unclear if
1902      this is a code problem or a problem with resetting code for g_
1903      variables that is being autogenerated wrong.
1904      Otherwise:
1905       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1906       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1907         are both still in chaos following their security messes.
1908    
1909    checkpoint52n_post
1910    o various build (mostly genmake2) changes including:
1911      - ability to build/run more easily within Cygwin and MacOS X
1912      - more complicated Makefiles with a stronger dependence on Gnu Make
1913    o pkg/seaice modifications
1914      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1915        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1916        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1917      - changed proxy for geostrophic velocity and updated
1918        verification/lab_sea/results/* accordingly
1919      - removed ADI dynamic solver from pkg/seaice
1920      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1921        they caused a segmentation fault under certain circumstances
1922      - removed unused field WATR
1923    o bug fix in exf-package:
1924      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1925         now reflect that.
1926    o small fixes in the cal-package:
1927      - set reference date to first of January for the 'model'-calendar
1928      - failing of cal_CheckDate in cal_FullDate now actually results in a
1929        warning
1930    o small modifications in exf-package to increase flexibility:
1931      - change climtempfreeze from a constant to a runtime parameter that
1932        is specified in data.exf_clim (default = -1.9)
1933      - introduce runtime parameter windstressmax (default = 2.0) that is
1934        specified in data.exf
1935    o fix in pkg/thsice:
1936      - update Evap (Tsf changes) to be consistent with Latent heat flux
1937      - maintain snow precipitation unchanged (even if Tsf >=0).
1938     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1939    
1940    checkpoint52m_post
1941    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1942      this does not change any of the results, because myIter=0 in swfrac always
1943      lead to jwtype=2 (the default anyway), but the call makes little sense
1944      as a default
1945    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1946    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1947      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1948    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1949    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1950    o extending useSingleCpuIO option to work with new exch2 I/O format
1951      - old-style, missing-tile I/O is still accessible by defining CPP
1952        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1953    o monitor package can write to NetCDF files and/or STDOUT
1954    o fix re-definition bug in MNC_GRID_INIT_ALL()
1955    o doc/api_reference added
1956      - a framework for building an API Reference Manual using all
1957        the "protex" comments embedded in the code
1958      - see pkg/generic_advdiff, pkg/mnc for examples
1959    o MNC:
1960      - make myThid the last argument for all subroutines
1961      - new default for the grid files: NO halos
1962      - add useMNC and other run-time flags
1963      - separate per-file-group handling of the unlimited dimension
1964      - early initialization of MNC w/ flags read at the eeboot stage
1965        and lookup tables set in initialize_fixed
1966      - write all MNC output to a freshly-created directory
1967    o thermodynamics sea-ice (thsice) is now tested with testreport.
1968    o test exp. advect_cs: use the standard cs32 grid ; update output.
1969    o Added functionality to grdchk:
1970      pick global i,j,k position (or nearest wet) where to perform check.
1971    
1972    checkpoint52l_post
1973    o new land formulation:
1974      a) use ground enthalpy as prognostic variable to ensure exact
1975         energy conservation.
1976      b) account for water temperature and for latent heat of freezing
1977         in all processes (rain, run-off, ground storage)
1978      c) compute surface and ground temperature implicitly.
1979    o aim_v23 modification for new land model:
1980      a) Treat separately land / ocean / sea-ice surface fluxes
1981         to allow implicit computation of land & sea-ice surface temp.
1982      b) add snow precipitation.
1983    checkpoint52l_pre
1984    
1985    o fix problem (when 1 tile is empty) in min/max monitor.
1986    o fix bug in timeAve (u,vZetatave in common block)
1987    o no restoring terms under ice for pkg/seaice
1988    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1989    o bug fix for pkg/seaice pickups
1990    o change MNC call locations and add coordinate attributes
1991    o mask vorticity at the corner ; affects global_ocean.cs output
1992    o fix ini_curvilinear_grid ; test CS experiments with mpi
1993    o aim.5l_cs: modify sea-ice fraction input file ; update output
1994    o exf: Adding simple range check routine for exf fields after read
1995    
1996    checkpoint52k_post
1997    o removed top-level directory "diags"
1998      - we migrated these functions to pkg/timeave a long time ago
1999    o fixed bug introduced in pkg/monitor
2000    o accuracy ctrlprec = 32 insuffient for gradient checks using
2001      averaged fields (I/O via cost_averages)
2002      -> use ctrl.h in active_file*.F to control I/O precision.
2003    o paramter list of CALL ADTHE_MAIN_LOOP
2004    o added initial do_the_model_io to ecco
2005    o set all ...Freq to zero after cost_final
2006      taveFreq, dumpFreq, pChkptFreq
2007    o MAIN and ECCO differentiability restored
2008    
2009    checkpoint52j_post
2010    o fix nchklev in tamc.h for global_ocean...
2011    o Bringing flow and store directives up-to-date
2012    o Really weird thing!
2013      call do_the_model_io from the_main_loop with parameters
2014      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2015      TAF places a faulty re-call of initialise_varia
2016      after cost_final call which should not be there!
2017    checkpoint52j_pre
2018    
2019    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2020      error messages
2021    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2022    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2023      debug output
2024    o modfied mdsio_writefield.F to handle non-global files under exch2
2025    o update AIM Cubed-Sphere exp (aim.5l_cs):
2026      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2027    o update AIM Equatorial Channel exp:
2028      use standard aim_v23 pkg and change the SST fields to be more realistic.
2029    o globalFile now works with exch2
2030    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2031      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2032    o limit timeave output for hi-res integrations
2033    
2034    checkpoint52i_post
2035    o removed CPP_EEOPTIONS.h from verification/*/code
2036    o updated the tiling for global_ocean_pressure
2037    checkpoint52i_pre
2038    
2039    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2040      the old pkg/aim).
2041    
2042    checkpoint52h_pre
2043    o shortened offending lines in exch2_send_rx?.template
2044    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2045  o genmake2: add build & execute test for NetCDF code  o genmake2: add build & execute test for NetCDF code
2046  o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed  o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2047    old grid files, moved CPP_EEMACROS.h to pkg/exch2    old grid files, moved CPP_EEMACROS.h to pkg/exch2

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