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revision 1.66 by jmc, Tue Mar 5 15:36:06 2002 UTC revision 1.882 by mlosch, Thu Sep 27 09:42:27 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/exf: improve vectorization by moving if-statement out of loops
8    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
9    o testreport:
10      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
11        monitor & update offline_exf_seaice exp. output.
12      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
13    o pkg/seaice:
14      - bug fix in the evp solver: boundary conditions were affected be
15        masking of zMax/zMin (changes results)
16      - minor bug fix in boundary conditions in seaice_calc_strainrates
17        (changes results for no_slip)
18      - seaice_lsr.F: make interpolation of eta dependent on boundaries
19      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
20      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
21        stress formulation and no-slip boundary conditions
22    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
23      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
24    o pkg/seaice: a first HSALT time stepping equation has been checked in
25    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
26      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
27      without requiring DO-IF statements
28    o pkg/thsice:
29      use continuous power-law function for partition of energy between lateral
30      melting/freezing and thinning/thickening ; old code using step function
31      still available with #undef THSICE_FRACEN_POWERLAW
32      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
33    o testreport: change AD testing : check against results/output_adm.txt
34      using same scripts as for forward test.
35    
36    checkpoint59g
37    o adjoint testing: in preparation for changing testreport:
38      - output format: cost and grad written on separated lines
39      - ad output results in directory "results" (instead of "results_ad")
40    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
41    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
42    o pkg/ecco: allow user defined cost function contributions
43    o testreport:
44      Allow to choose (per experiment) the list of tested output variables
45       and the main variable (used to issue a pass/FAIL ) ;
46      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
47      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
48      Also modify printing of summary:
49       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
50       b) echo the list of tested variables in the individual summary.txt of
51          each experiment.
52    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
53      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
54      (but still depend on the tile decompostion of the domain).
55    o pkg/seaice: change a discretization detail to make the B-grid code
56      "more symmetric". This change is likely to remove all "ridges/leads" that
57      where quasi-aligned with the grid in B-grid solutions. It may also be
58      the solution to the stress coupling issues with the B-grid.
59    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
60      remove .cvsignore from input dir. (since testreport no longer run here).
61    o pkg/thsice:
62     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
63     - fix reshaping of sea-ice just after advection:
64       melt all the ice only if ice-volume is too small.
65     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
66       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
67     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
68    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
69      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
70    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
71      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
72      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
73      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
74      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
75      -> update output.txt
76    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
77     this affects truncation error: -> update output.txt of exp:
78      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
79      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
80    
81    checkpoint59f
82    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
83    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
84      a bounded range (in forward mode)
85    o pkg/ecco, ctrl, autodiff and mom_common:
86     internal parameter controls, completements of implementations
87    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
88    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
89      (not seem any difference in testing results).
90    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
91       at face corners.
92    o pkg/generic_advdiff:
93     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
94      loop range indices for computing vertical advection tendency
95      and do the calculation in the interior only (no overlap) ;
96      for now, only implemented for SOM advection (to save CPU time).
97     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
98    o exch2 adjoint
99      First set of changes:
100      - add exch2 hand-written adjoint templates
101      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
102        This will require cleanup in pkg/autodiff/*.F
103        (changed routines currently kept separate in verif. code/)
104      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
105        that used to hide exch2 or cubed-sphere specific code
106        (commented via 'cph-exch2')
107    o pkg/seaice
108      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
109    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
110       output of global_ocean.cs32x15.thsice .
111    
112    checkpoint59e
113    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
114      for B-grid vector (not yet tested) and C-grid vector (<- only used
115      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
116    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
117      (#ifdef ALLOW_SALT_PLUME)
118    o gather_2d/scatter_2d: removed halo regions
119    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
120      scheme and the corresponding test case (under front_relax dir). For now,
121      only available with Skew-flux form and not yet tested in realistic set-up.
122      adjoint: store directives updated, but gradient checks deteriorated,
123      so maybe GM/Redi adjoint is now broken.
124    o seaice adjoint
125      * add AREA, HEFF, HSNOW as control variable
126        (should not change lab_sea results)
127      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
128    o pkg/seaice:
129      * added computation of saltFlux in seaice_growth;
130        For time being, sea ice salinity is assumed constant
131        contribution of snow flooding to freshening of sea ice is neglected.
132        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
133        defaults to 0.0 in order to maintain backward compatibility.
134        Typical values for SEAICE_salinity are 4 to 10 g/kg.
135      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
136      * added SEAICE_availHeatFrac, which specifies fraction of surface level
137        heat content used to melt or grow ice
138      * commented out cap of HICE: it helps keep ice thinner
139      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
140      * applied OBCS T/S mask to HEFFM sea ice mask
141    
142    checkpoint59d
143    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
144     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
145     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
146    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
147     and change default value of parameter "GM_Small_Number";
148     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
149       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
150       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
151    o pkg/ecco: cost function when applying pkg/smooth to controls
152    o pkg/ctrl: add forcingPrecond run time parameter
153    o pkg/seaice:
154     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
155     - fix bug in metric terms of u-equation in LSR solver (implicit part),
156       changes verification/lab_sea
157     - rearrange implicit part of u-equation in LSR solver to make it easier to
158       read, understand, and debug. This causes changes at the truncation level.
159     - fix (serious) bug in the boundary conditions (sign error in the implicit
160       part) of the LSR solver. Changes all LSR results.
161     - fixed problem with HSNOW initialization to avoid thick snow when AREA
162       is initilized with small values - does not change lab_sea results.
163     - added HsnowFile initialization capability
164    o pkg/smooth: addition to model/src and pkg/ctrl so allow
165     initialization of pkg/smooth and application to control vector
166    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
167    o dependencies: pkg/profiles requires pkg/cal
168    o pkg/profiles:
169     - added option ALLOW_PROFILES_GENERICGRID
170         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
171         that interpolation information (grid points and coefficients) is provided
172         within the netcdf input files.
173         -> sample matlab scripts can be found in MITgcm_contrib/gael
174         that allow you to prepare netcdf input files.
175     - also modified: cleaner include statements, cleaner error print statements,
176       cleaner stops when error, and more tests of the netcdf input files consistency.
177    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
178    o pkg/seaice:
179     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
180       requires a new routine: seaice_diagnostics_fill.F
181     - make sure that seaice does not move if not forced (pressure replacement
182       method, Hibler and Ip, 1995), changes results
183     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
184     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
185       It is turned off by default (=-1.), because it changes the results.
186     - make it possible to read AREA from a file, too.
187    
188    checkpoint59c
189    o add S/R and diagnostics for oceanic mixed-layer depth
190    o move GMRedi call after all vertical mixing schemes (including KPP)
191    o pkg/thsice:
192     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
193      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
194    o pkg/obcs:
195     - bug fix for balance code
196    o pkg/seaice:
197      - allow values of SEAICE_elasticParm > 1
198      - add new parameter SEAICE_evpTauRelax as an alternative
199        to SEAICE_elasticParm
200      - make lsr boundary conditions free slip (by default), changes result
201      - add code for no slip boundary conditions for lsr
202      - set minimum of zeta to zero (and not 4e8) (changes results)
203      - add a cap on AREA after advecting AREA if seaice_growth is not called
204    o change calculation of Visbeck K:
205      - no longer depend on tapering scheme; instead, compute slope (limited
206        by GM_maxSlope). this is equivalent to what was comuted before with
207        clipping or linear tappering.
208      - fix vertical averaging (wrong by 1/2 level)
209      - leave the old version (but will not be maintained) within
210        #ifdef OLD_VISBECK_CALC / #endif
211      - update output of exp. ideal_2D_oce
212    o change error catch in calc_r_star to improve vectorization
213    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
214      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
215    o adjoint:
216      Re-organized adjoint checkpointing according to Matt Mazloff
217      (but with modifs/completions/cleanups)
218      Storing is now bundled into large arrays to optimized I/O
219      (and second step in cleanup of the_main_loop)
220    
221    checkpoint59b
222    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
223      - export/import (between ocean & coupler) fields needed for ocean DIC.
224    o pkg/seaice:
225      - get rid of three more exchanges seaice_calc_viscosities (required
226        different loop boundaries in seaice_lsr and seaice_ocean_stress)
227      - bug fix in seaice_ocean_stress (update of lab_sea required)
228      - reduce loop boundaries to necessary minimum also in seaice_evp
229      - go back to the old way of computing deltaC/Z as the adjoint likes that
230        better
231    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
232      passive tracer to an Age Tracer) + update output.txt
233    o pkg/exf:
234      - implement A-grid / C-grid selection for wind-stress input files.
235      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
236      for now, in exf_bulk_largeyeager04.F only :
237      - change implementation for case where windspeed + 2. components wind-stress
238        are read-in. AND use rhoConstFresh to convert evap.
239    o pkg/seaice:
240      - use correct EXCH_UV for wind-forcing (on A-grid).
241      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
242        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
243    o pkg/exf:
244      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
245      EXF_INTERPOLATION:
246      - merge global_with_exf/code version of exf_interp_read.F
247        to the main code ;
248      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
249        reading the file ; Important: This options needs to be defined to recover
250        previous code.
251        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
252      - no longer loose real*8 precision along the way when using exf_iprec=64.
253    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
254      - change discretisation of evp-solver in order to avoid another exchange
255        (changes lab_sea) and clean up a little
256      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
257        help the adjoint (this also changes the results slightly)
258      - add a few "_d 0" where they had been missing in seaice_evp.F
259      - cleaning up: remove unused seaice_calc_rhs.F
260    o pkg/exf: some cleaning-up:
261      - change various "constants" into runtime parameters
262      - cleaned-up Large&Yeager04 routine which should eventually
263        replace exf_bulkformulae.F (changed names of S/R and CPP)
264        and merged various ALLOW_ATM_WIND options
265     only used with thsice pkg (in thsice_get_exf.F):
266      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
267        which are used when useStabilityFct_overIce=TRUE (= the default)
268      - change default values of ice & snow emissivity and scale downward LW
269        by ice & snow emissivity.
270    o pkg/thsice:
271     fix few little problems, in thsice_calc_thickn.F:
272      - growth vertically (and not laterally) if iceFrac == iceMaskMax
273      - melt only laterally if hIce < hThinIce (as the comments say)
274      and in thsice_extend.F:
275      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
276      - start to form ice as soon as the minimum ice-volume is reachable.
277     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
278      and cpl_aim+ocn
279    o pkg/kpp
280     - move computation of surface related input fields to KPP into a new
281       subroutine kpp_forcing_surf.F
282     - remove wrong (within bi,bj loops) EXCH calls.
283     - little cleaning (add argument myThid in last position, cvs header ...)
284     - for now, fix conservation problem by exchanging KPPviscAz (may not
285       be the best fix)
286    o pkg/seaice
287     - check for inconsistent evp parameter/cpp-flag combination
288     - remove leftover errIO flat for obsolete name list error handling
289    o OpenAD
290     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
291    
292    checkpoint59a
293    o pkg/seaice: some parameter clarifications and a little bit of clean up
294    o pkg/thsice: rename run-time parameters:
295       himin       -> hIceMin
296       himin0      -> hThinIce
297       hihig       -> hThickIce
298       i0          -> i0swFrac
299       transCoef   -> bMeltCoef
300       frac_energy -> fracMelting
301      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
302       with default values (for now) that do not change the results.
303      remove old version of thsice vars advection in pkg/seaice.
304    o in FFIELDS.h:
305      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
306      - make pLoad & sIceLoad always available (but still only used if
307         ATMOSPHERIC_LOADING is #define).
308    o pkg/kpp: replaced _KPP_RL with _RL
309    o bug fixes for vertical diffusivity computations when both KPP and
310        3D diffusivity arrays are used.
311    o pkg/seaice: fix bug in evp solver, while doing that
312      - change (improve?) discretization of stress computations for both
313        cgrid-lsr and evp solver
314      - add a new routine to compute strain rates
315      - the above changes lab_sea results
316      - add no slip conditions for evp solver (off by default), lsr-version
317        may follow
318      - fix exchange for shear at Z-points (does not change lab_sea)
319      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
320        (to force the user to pick a time step since there is not "safe" way
321        of choosing it)
322      - add principal stress diagnostics
323      - rearrange fields for evp a little to avoid having to call a: too many
324        exchanges and b: exchanges for stress trensor components which we do
325        not have.
326      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
327        of evp, complete rewrite for lsr case (latter is does not yet work
328        in all cases)
329    o pkg/kpp: add code to have mixing in shelf ice caverns
330      - add myThid to all kpp routines (long overdue)
331    
332    checkpoint59
333    o pkg/exf:
334      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
335        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
336      - move exf header files from lower_case.h to UPPER_CASE.h ;
337        add missing cvs Header & Name
338      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
339      - add namelist param. selectStressGridPosition, exf_monFreq
340      - retire many _CLIM routines, and remove data.exf_clim
341        + params moved to data.exf
342        + climsst, climsss now handled by exf_set_gen, i.e.
343          climss?period=0 refers to constant field,
344          climss?period=-12 to monthly forcing
345      - split up namelists in data.exf
346    o pkg/seaice:
347      - remove seaice_exch and seaice_exch_uv
348      - remove superfluous exchange of theta
349      - add myThid to seaice_budget_ocean/ice
350      - add new interface for atmospheric wind forcing (C-grid only)
351        + new routine
352        + two new field (taux, tauy for stress over ice)
353        + removed one global field (DAIRN) for C-grid case only
354    o pkg/thsise
355      - 2nd set of modifs for thsice adjoint in conjunction with exf
356    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
357    
358    checkpoint58y_post
359    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
360      vertical diffusivity, similar to that in MOM4; turned on using
361      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
362      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
363    o Added capability for 3D specification of background vertical diffusion
364      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
365      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
366      "data" file that contains the 3D vertical diffusivity coefficients.
367    o ice dynamics (pkg/seaice) with thsice thermodynamics:
368      - add code within pkg thsice to advect & diffuse sea-ice fields
369      similar to (and will replace) what has been added in  seaice_advdiff.F,
370      but: - conserving Mass, Heat & Salt.
371           - better when using non-linear advection scheme (not yet fully tested)
372           - can also be used in atmospheric set-up (for now, only the diffusion).
373    
374    checkpoint58x_post
375    o IO option for global-file compact format:
376      - add options when generating topology (utils/exch2/matlab-topology-generator)
377      - add I/O capability (pkg/mdsio).
378      - adapt utils/matlab/rdmds.m to read this format.
379      for now long-line format not yet supported by pkg/mdsio (& exch2).
380    o shelfice: add a few diagnostics
381    
382    checkpoint58w_post
383    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
384      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
385      (and replace horiVertRatio in NH code).
386      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
387                         and tutorial_plume_on_slope (sensitive to truncation)
388    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
389      directly to drive seaice model (C-grid only)
390    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
391     - reintroduce computation of wind from stress,
392     - compute tau (in exf_bulkformulae.F) from windstress averaged to
393       mass points to avoid tau = 0
394     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
395    o rdmnc.m: make it work with "global" files created with gluemnc
396    o rdmnc.m : some improvements in dealing with singleton dimension
397      (tested on all testreport mnc output files).
398    o genmake2: disable pkg/profiles if netcdf test fails.
399    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
400    o move call to cal_readparms up to make calendar parameters/variable available
401      to all packages
402    
403    checkpoint58v_post
404    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
405      useDynP_inEos_Zc tested.
406    o pkg/exf: changes to properly interpolate/mask/scale initial fields
407    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
408      and portions thereof.  See read_cs.txt for description and examples.
409    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
410      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
411      following the great-circle arc between those 2 points.
412    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
413      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
414    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
415     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
416     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
417     - still needs work (not working with some options ; efficiency to improve)
418       and serious testing.
419     - use this scheme for temperature & salinity in 2 advection test exp.:
420       advect_xy & advect_xz, respectively.
421    
422    checkpoint58u_post
423    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
424    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
425    o testreport: add option "-skipdir" to skip some test.
426    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
427      momentum calculation.
428    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
429    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
430      remove checkpoint.F and the_correction_step.F (no longer used);
431      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
432    o add option (linFSConserveTr) to correct for tracer source/sink due to
433      Linear Free surface
434    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
435    o pkg/thsice: fix reading mnc-pickups
436    
437    checkpoint58t_post
438    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
439    o pkg/mdsio:
440     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
441       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
442       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
443     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
444     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
445       either MDS_READ_FIELD or MDS_WRITE_FIELD )
446     - new S/R (to replace MDSWRITEMETA), which allows to write more
447       informations (variable names, time ...) to meta files.
448     - modify rdmds.m to give back the meta file content.
449    o pkg/diagnostics: change vertical interpolation to be safer, and more
450       flexible (define p-levels to interpolate to in data.diagnostics);
451      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
452       diagnostic pointer.
453    o pkg/seaice: more cleaning up of seaice_growth, added many comments
454    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
455    o fix multi-category seaice:
456     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
457       SEAICE_MULTICATEGORY
458     - fix short wave heat flux
459    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
460       and allow to use EVP solver. Change forward lab_sea: test both EVP
461       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
462    o Initial check-in of lab_sea adjoint
463      (very similar to natl_box_adjoint/code_seaice)
464      * used C-grid and EVP solver
465      * used KPP, GM/Redi
466      * uses inAdExact=.TRUE.
467      * gradient checks fail for both ADM and TLM
468        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
469        f.d. gradients actually seem more problematic than ADM, TLM gradients;
470        issue is related to forward mismatch between g77 an ifort
471    o pkg/seaice: overhaul of thermodynamics
472     - growth.F and groatb.F are replaced by new routine seaice_growth.F
473     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
474     - move a few global fields out of SEAICE.h into seaice_growth.F and
475       make them 2D (FICE/QNETO/ ...)
476     - remove FO (it is the same as QNETO)
477     - introduce a few local fields to avoid modifying external fields such
478       as atemp, etc.
479    
480    checkpoint58s_post
481    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
482      changed exf_set_gen.F so that
483        genperiod=0 means input file is one time-constant field and
484        genperiod=-12 means input file contains 12 monthly means
485    o CG2D: use pre-computed solver main-diagonal (stored in common block);
486      this affects truncation error ; generate new output file for exp. which
487      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
488        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
489        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
490        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
491        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
492        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
493    o start implementation of deep-atmosphere and anelastic formulation
494    o verification: remove 2nd copy of input files and use script "prepare_run"
495      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
496    o mom_common/vecinv/fluxform: fix a few initialisation isssues
497    o profiles: fix for multithreaded case
498    
499    o diagnostics: rename few diags:
500      s/'PRESSURE'/'RCENTER '/g
501      s/'TICE    '/'oceFreez'/g
502      s/'TAUX    '/'oceTAUX '/g
503      s/'TAUY    '/'oceTAUY '/g
504      s/'SWFLUX  '/'oceQsw  '/g
505      s/DIFx/DFxE/g
506      s/DIFy/DFyE/g
507      and add few ocean-forcing diagnostics:
508      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
509    o modifications to pkg/seaice/growth.F and budget.F, which change results of
510      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
511      as actual snow thickness.  It now refers everywhere to effective snow
512      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
513    
514    checkpoint58r_post
515    o modifications to pkg/seaice/growth.F, which change results of
516      lab_sea experiment: fixes pertain to melting snow over open water, to
517      masking EVAP under sea ice, and to using the correct AREA variable for
518      computations of EVAP, PRECIP, HSNOW, and GHEFF
519    o add ability to read bathy, salt, and theta using MNC (off by def)
520    o add flooding algorithm and advection of HSNOW for pkg/seaice;
521      both are turned off by default and do no change any results
522    o seaice advection with pkg/thsice: a step toward the use of non-linear
523      advection scheme, but #ifdef or commented out for now (requires more EXCH).
524    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
525      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
526      in natl_box (affects results @ truncation level: update output.txt)
527    o multi-threading and IO:
528      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
529      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
530        (needed to work with SingleCpuIO): tested in all verif. exp.
531    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
532      affects the results (but none of the verification test uses this scheme).
533    o Adding some pkg/diagnostics capability to pkg/seaice
534      (will certainly be subject to changes)
535    o ctrl: adding new control variables:
536      lwflux, lwdown, evap, snowprecip, apressure, runoff
537    
538    checkpoint58q_post
539    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
540      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
541      high_res_cube configuration by 4% on Columbia.
542    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
543      add (in global_with_exf/code) a version of EXF_INTERP_READ without
544      dynamical allocation (seems to work in multi-threaded).
545    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
546      single CPU io) so that TAF does not have to see EESUPPORT.h
547    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
548    
549    checkpoint58p_post
550    o obcs: stop if obcs is used with useCDscheme = .true.
551    o shelfice:
552     - fix a sign error so that no slip at shelfice interface works
553     - remove stop for combination non-hydrostatic code and shelfice. That does
554       not mean, that the results are correct, but at least they are numerically
555       stable
556    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
557    o added adjoint exch routined for all exch*3d* routines
558      and updated flow directives
559    
560    checkpoint58o_post
561    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
562      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
563    o change controling S/R for writing pickup file (new S/R do_write_pickup)
564      and clean-up reading/writing of pickup files.
565    o fix local version of read/write pickup (NH part) in rotating_tank/code
566    o simplify EXCH interface:
567     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
568     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
569    o added the regrid package
570    o shelfice:
571     - add a simple boundary layer scheme to reduce noise
572     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
573    
574    checkpoint58n_post
575    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
576       local variable (not in common block).
577    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
578      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
579      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
580        to work with SingleCpuIO.
581    o add "_d 0" to real constant of pkg/cfc subroutines ;
582       update exp. cfc_exemple & tutorial_cfc_offline output files.
583    o multi-threading and IO:
584      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
585        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
586      - barrier before and after reading.
587      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
588      - avoid using MDS_WRITELOCAL for LAND pkg output.
589      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
590        common-block variables ; Allows multi-threading with master-thread IO.
591    o change default MAX_NO_THREADS from 32 to 4 ;
592      and stop cleanly when MAX_NO_THREADS is too small.
593    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
594    
595    checkpoint58m_post
596    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
597       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
598    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
599       keep global_ocean.90x40x15 (for AD testing) with former secondary test
600       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
601    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
602        add MITgcm_tutorials (= code + all the tutorials)
603    o ecco, option to compute cost for total ssh (mean+anom)
604    o consistent with addition of ptracer and ssh in pkg/profiles
605    o profiles: adding ptracer and ssh
606    o testreport: change multi-test output-file name
607      (from output.txt.{name} to output.{name}.txt)
608    o profiles: now ok for mutli-tiles case
609    o seaice: add 4 parameters for different advection schemes for area,
610      (effective) seaice thickness, enthalphy, and snow height. Their default
611      is the standard parameter SEAICEadvScheme
612    o calc_gw:
613     - add cosFacU in zonal viscous flux (harmonic.visc.).
614     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
615       of tutorial_plume_on_slope.
616    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
617    o calc_gw: true flux-form, account for horizontal grid spacing.
618      update rotating_tank results, but not plume_on_slope (affected at
619      truncation level, 11 digits).
620    
621    checkpoint58l_post
622    o calc_gw:
623     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
624     - remove side-drag for now (need to fix it); update plume_on_slope results.
625     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
626    o commit code to make SST/SSS weights spatially variable
627      (based on either variable in-situ or variable initial T/S weights)
628    o pkg/ecco:
629      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
630        now based on horizontally varying weights wthetaLev, wsaltLev
631      * cost_averagesflags now returns year indices in addition to day, month
632      * sflux balance is performed on annual basis
633        (sflxumm, sfluxmm2, bal_sfluxmm)
634      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
635        including separate counting and multipliers
636    o pkg/rbcs
637      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
638    
639    checkpoint58k_post
640    o testreport:
641     - always build in dir. "build" (if not there, mkdir build instead of building
642       & running in input)
643     - run in dir run (if it exists), in build otherwise.
644     - call prepare_run (if input/prepare_run exists)
645     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
646    o pkg/exf modifications to interpolation and rotation routines for more
647       reasonable treatment of North Pole singularity: for tracers North Pole
648       value is set to northernmost zonal-mean value, for zonal velocity it is
649       set to zero, and for meridional velocity it is set to northernmost value.
650    o pkg/exf/exf_check_range.F
651     - add tile index to diagnostics and move stop statement to the very
652       end of the routine.
653    o pkg/diagnostics: (diagnostics_main_init.F)
654      define title of isomorphic variables according to the current config.
655    o pkg/thsice with pkg/seaice dynamics:
656    - fix domain of computation (interior only, required for exf) and do exchanges
657    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
658    o towards a standard way of dealing with multi-threading in MONITOR
659      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
660    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
661       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
662    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
663    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
664    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
665       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
666    o tracer advection:
667     - clean-up and simplify calc_common_factors.F
668     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
669       advection subroutine (but still not used within DST advection S/R)
670    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
671    
672    checkpoint58j_post
673    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
674      from file (collects calls previously in FORWARD_STEP)
675    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
676    o adjoint store dir. adjusted accordingly
677    o genmake2
678      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
679    
680    checkpoint58i_post
681    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
682      on wind stress (SEAICEstressFactor defaults to 1.)
683    o Total number of Timers is finite (<=40): comment out 2 non-essential one
684      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
685    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
686      on CS-grid: no longer loosing mass.
687    o exf & curvilinear-grid: no longer modify longitude xC & xG.
688    o pkg/ggl90: fix sloppy output and fix a bug
689    o pkg/seaice: added SEAICEuseEVPpickup parameter
690      - Set to false in order to start EVP solver with
691        non-EVP pickup files when using SEAICEuseEVP
692      - fix sign error in diffusion in seaice_calc_rhs
693    
694    checkpoint58h_post
695    * Modifications for bottom topography control
696      o replace hFacC by _hFacC at various places
697      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
698      o add non-self-adjoint cg2d_nsa
699      o update autodiff support routines
700      o re-initialise hfac after ctrl_depth_ini
701      o works for 5x5 box, doesnt work for global_ocean.90x40x15
702    * Adding verification for 5x5 box (4-layer) bottom topography control
703    
704    checkpoint58g_post
705    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
706       used for mean seasonal cycle, mean diurnal cycle); add an example
707       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
708    o pkg/ggl90:
709      - add parameter (minimum surface kinetic energy)
710      - fix bug (avoiding division by zero)
711    o couple pkg/thsice to pkg/seaice:
712      - modify advection in seaice to accomodate new scalar fields to be advected
713      - only muliDimAdection scheme work with seaice/thsice
714      - mapping of thsice-variables to seaice-variables, back and forth
715      - does not break the verification experiments, but does not give the
716        desired results either
717    o pkg/seaice
718      - make (default) second order advection a bit less confusing?
719    
720    checkpoint58f_post
721    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
722      to pkg/seaice):
723      - new routines thsice_map_exf and thsice_get_exf provide the interface
724      - add an additional formal parameter to thsice_solve4temp
725    o pkg/exf:
726      - add new fields wspeed, snowprecip (to be able to couple to thsice)
727      - correct Stefan-Boltzmann constant
728      - new parameter for longwave surface emittance
729      - separate some stuff from exf_bulkformulae into new routines  
730        exf_radiation, exf_wind
731      - add new parameters and constants: longwave emissivity for ocean, ice
732        and snow, evaporation parameters over ice
733      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
734        either wind from stress or stress from wind
735    o pkg/thSIce:
736    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
737    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
738       and THSICE_CALC_THICKN
739    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
740    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
741      to make debugging easier.
742    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
743    o pkg/bulk_force:
744      - clean-up comments and parameters ;
745      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
746    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
747      generate new output for test-experiment: aim.5l_cs.thSI
748    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
749      testreport accordingly
750    
751    checkpoint58e_post
752    o SEAICE_CGRID adjoint done
753    o R_STAR adjoint implemented.
754      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
755      * need to sort out init. of h0facc, etc.
756    o Make pkg/profile fully independent of ecco,cost, etc. stuff
757      to be able to use it in pure forward.
758    
759    checkpoint58d_post
760    o upgrade simple test-experiment to tutorial example:
761     step.1: duplicate the experiment and (step.2) will remove the old copy.
762      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
763      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
764      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
765      tutorial_global_oce_biogeo    <- copy of dic_example
766      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
767      tutorial_plume_on_slope       <- copy of plume_on_slope
768      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
769      tutorial_global_oce_optim     <- empty for now (David ?)
770      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
771     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
772    o correct a sign problem in cost_scat.F
773    o obcs and ptracers: fix boundary conditions for advections schemes
774      with larger stencil
775    o thsice adjoint: start
776    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
777      completeness
778    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
779      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
780    o ptracers adjoint:
781      * avoid extensive recomputatations
782      * fix missing re-init. of gptr (missed by TAF)
783    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
784      me to turn off the excessive output to STDOUT that this package produces
785    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
786      and add those terms in Vector-Invariant formulation.
787    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
788      if the control period (xx_hfluxperiod etc) is 0
789    o in profiles pkg, clean routines and fix details
790    o in ecco pkg, reading ssh data:
791      fix problem in case the model does not start at iter0=0
792    o fix mnc-pickup/restart for ptracers
793    o new package prifiles:
794      code to compute profile-based cost by Gael Forget
795      (modifs in ecco, ctrl, autodiff)
796    o Benign bug fix in initialization (spotted by M. Mazloff) of
797      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
798    
799    checkpoint58c_post
800    o adjoint: finish NLFS adjoint and provide reference output in
801      verification/global_ocean.90x40x15/results_ad_nlfs
802    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
803      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
804      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
805      with SEAICE_CGRID defined.
806    o move calendarDumps from "data" to "data.cal" and clean-up the code
807      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
808    o add useEXF & useCAL flags (for now, set in hard-coded way)
809    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
810      (were missing in NH mode, and wrong in quasihydrostatic mode).
811      waiting for Chris updated version of calc_gw to add those CALLs.
812    o fix bug in quasihydrostatic S/R ;
813      add a test for this option: global_ocean.90x40x15.qshyd
814    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
815      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
816    o add on/off flag useOffLine for package OFFLINE
817    o seaice:
818      - modify advection so that it works also on the C-grid
819      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
820        problem in multi-tile runs with C-grid
821      - add flags for clipping ice velocities and/or masking solver forcing
822      - fix drag (ocean on ice) formulation and a bug that caused noise in the
823        C-grid solver
824      - added a few comments to seaice_diffusion.F
825      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
826        are now exclusive)
827      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
828        required re-ordering the code a little:
829       + make DAIRN global variable (defined in SEAICE)
830       + move computation of the viscosities eta and zeta into a new separate
831         routine (because I need to recompute them in seaice_ocean_stress.F)
832    
833    checkpoint58b_post
834    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
835      update output.txt of exp. aim.5l_cs.thSI
836    o various mnc cleanups and improvements:
837      + shrink lookup tables by factor of ~4
838      + better error reporting when running out of lookup space
839      + able to handle longer path/file names (up to 500 chars)
840    o adjoint:
841      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
842      - TBD: "hidden" mom_vecinv recomp. in dynamics
843    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
844     (allow to differentiate between forcing components using new integer flags:
845      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
846     and add new flag to put Dissipation tendency out of Adams-Bashforth.
847    o ecco
848      - enable trend removal from SSH anomaly obs.
849    o adjoint
850      - a fix for PmEpR when #undef EXACT_CONSERV
851      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
852      - try to fix "hidden" recomp. in forward_step for NLFS
853        (NLFS seems broken sometimes after I checked it in)
854    o seaice:
855     - add c-grid version of the dynamic solver:
856       + three new routines that are the c-grid substitute lsr, dynsolver
857         and ostres
858       + put a few fields that were local to dynsolver into global common
859         blocks, so that I can move the computation of stresses etc into
860         seaice_lsr (saves coding but may break the adjoint).
861     - replace more hardwired parameters by runtime parameters
862     - add ice masks that mask the rhs of the implicit solvers where there
863       is no ice (commented out in seaice_dynsolver, because i am not sure
864       if this works properly), eventually this should replace the clipping
865       of ice velocities in seaice_dynsolver to +/-40cm/s.
866    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
867      include it only where its needed
868    o move balancing of fluxes before the call of external_forcing_surf
869    o seaice:
870      - correct units of turning angles (now they are really in degrees)
871      - move computation of GWATX/Y out of main routine into dynsolver
872      - initialize GWATX/Y in seaice_init
873    o Apply mask on Fresh-Water flux (needed for SSH forcing).
874      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
875    o seaice: add runtime flags for turning angles (default to zero)
876    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
877      and trend from exf forcing and ctrl control adjustments
878    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
879      (since checkpoint57x_post)
880    o change the default rotation period to 86164.s = the Earth rotation
881    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
882      and based on a reference stratification. Tested within hs94.cs-32x32x5.
883    o seaice advection: add code for choosing between the default (2nd order
884      central differences) and multiDim advection schemes provided by
885      pkg/generic_advdiff
886    o seaice:
887      - removed all references to SEAICE_GRID.h fields from
888        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
889        (cubed-sphere configuration will change a little)
890      - grid computations in seaice_init are obsolete now.
891      - cleaned up code a little so that is easier to read (hopefully).
892      - added new (better?) discretizations of default advection and diffusion
893        (turn on with SEAICEuseFluxForm)
894      - replace 1 in 3d global fields by kSurface in growth.F
895      
896    checkpoint58a_post
897    o seaice:
898      - bug fix in advect.F
899    o shelfice:
900      - separate shelfice load anomaly from pload (breaks with time
901        dependent forcing), => introduce constant field shelficeLoadAnomaly.
902        Its default is 0., but it may be computed more cleverly from (unknown)
903        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
904        done offline. A good approximation of the pressure load anomaly is
905        necessary to avoid large initial adjustment processes underneath
906        deep-reaching shelfice.
907      - small fix in ISOMIP shelfice_thermodynamics
908      - add more sophisticated thermodynamics of Hellmer (1989), this is
909        now the default
910      - give a few constants more intuitive names
911    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
912      if bulk formulae are used in long integration (especially EmPmR). Turn
913      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
914      if balancePrintMean, the imbalance that is substracted is printed to
915      STDOUT.
916    o fix bug (typo) in obcs_apply_eta.F
917    o add a new package shelfice which enables us to model the circulation
918      underneath shelf-ice with draughts of hundreds of meters.
919     - works
920     - to do: + include improved thermodynamics
921              + check whether kSurfC (from model/inc/SURFACE.h) can be used
922                instead of new field kTopC
923              + can we use topoFile, Ro_surf and existing code in ini_depth.F
924                instead of new field R_shelfIce and new code in ini_depth.F
925                and ini_mask_etc.F?
926              + adjust vertical mixing schemes?
927    o seaice pkg:
928     - add a cpp-flag to include a simple formula for a salinity dependent
929       freezing point of sea water at the surface
930     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
931       meridional stresses are now different (and hopefully correct)
932    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
933       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
934       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
935    o pkg/diagnostics: add options and parameters for regional-statistics
936       diagnostics ; define regions by reading a region-mask from a file
937       (might add other options later)
938    o pkg/bulk_force:
939     - add option and parameters to use AIM surface-flux formulae.
940     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
941       others forcing fields (defined in PARM05, parameter file "data") are loaded
942       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
943     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
944     - use the right EXCH call for uwind,vwind (to work on CS-grid).
945     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
946       and parameters (note: calcWindStress replaces .NOT.readwindstress).
947     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
948    
949    checkpoint58
950    o add "--embed-source" option to genmake2 which, when the supporting
951      tools can be compiled (as determined by genmake2) will turn on the
952      embed_files package which then embeds the entire MITgcm source code
953      (*.[fFhc] + Makefile) used for the build within the executable
954      - requested by CNH but off by default
955      - adds a paltry <9MB to the mitgcmuv executable in most cases
956      - only writes the output when useEMBEDSRC in eedata is true
957    o clean up 3-dim. relaxation codes:
958      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
959      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
960      * Thanks to Tom Haine for testing!
961    
962    checkpoint57z_post
963    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
964      affects output (@ truncation level) of exp. plume_on_slope ; updated.
965    o fix the pickup behavior for obcs in combination with ptracers
966    o fix a bug in ptracers_external_fields_load
967    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
968      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
969    o transfered surface NH pressure to eta field (if exactConserv).
970    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
971         and update lab_sea output.txt file.
972    o completing 3-dim. relaxation code: additional term
973         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
974      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
975      * At compile time, in "EXF_OPTIONS.h" set
976          #define  ALLOW_CLIMTEMP_RELAXATION
977          #define  ALLOW_CLIMSALT_RELAXATION
978      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
979          tauThetaClimRelax3Dim = 15552000.0,
980          tauSaltClimRelax3Dim  = 15552000.0,
981      * 3 cases:
982          1) Use a constant-in-time 3-dim. field
983          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
984          3) Real-time relax. to time-evolving prescribed field
985    o Adding Laplacian-type smoothness constraint on
986      initial and boundary (forcing) controls (ic, bc)
987      * enable at compile-time via
988        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
989      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
990      * Absolute scale somewhat unclear so far
991      * no area weighting was included since no other cost term does so far
992    
993    checkpoint57y_post
994    First step for a NLFS adjoint
995    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
996    o new init. routines for calc_r_star, calc_surf_dr
997    o still need to deal with ini_masks_etc
998    o testreport seemed happy
999    checkpoint57y_pre
1000    
1001    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1002    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1003    o add new offset feature to offline pkg (plus minor cleanup)
1004    o cfc fixes for final year of integration
1005    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1006      be in GCHEM_OPTIONS).
1007    
1008    checkpoint57x_post
1009    o fix testreport Pb in multiple test experiment.
1010    o cleanup our namelist syntax in verification:
1011      - make it more F95 standards compliant (some work still needed)
1012      - allows the vast majority of our tests to work with gfortran
1013    o Non-Hydrostatic:
1014     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1015     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1016    o Allow to apply AB on T,S rather than on AB(gT,gS):
1017     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1018     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1019       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1020     - need a "clever" read_pickup to restart from the other AB formulation
1021    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1022    o remove some unused variables (reduces number of compiler warnings)
1023    o adjoint
1024      * Disable useVariableViscosity for adjoint for time being
1025        (there are a number of extensive recomputations)
1026      * Initialize certain variables needed for adjoint
1027    
1028    checkpoint57w_post
1029    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1030                 fix the singleCpuIO RS version of MDSWRITEFIELD
1031       and add a WARNING if using globalFiles=T with multi-processors.
1032    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1033      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1034    o tracer advection scheme:
1035      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1036       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1037       was not very convenient).
1038      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1039       (further tests needed for the implicit DST & Flux-Limiter schemes).
1040    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1041      and sRef for convenience, handy, when you want to initialize
1042      ptracers in a large domain with a constant non-zero value. Also,
1043      untangle ptracers_init.F a little.
1044    
1045    checkpoint57v_post
1046    o change dome exp. to use variable viscosity in side-drag terms.
1047    o remove all the files from the cfc_offline test since they are now
1048      incorporated into tutorial_cfc_offline which has been producing
1049      identical results for a few days of testing
1050    o add new parameter: sideDragFactor to enable half-slip-side BC
1051      and change side-drag S/R to use viscosity from mom_calc_visc
1052      (can switch back by setting sideDragFactor=0.); affects results at
1053      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1054       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1055    o vorticity & strain are now computed without masking, to account for
1056      no-slip-side BC in variable viscosity calculation ; mask is applied
1057      anyway later on, before computing advection/coriolis terms.
1058    o modify exp4 to test new obcs support for reading from external files
1059      and for passive tracers
1060    o fix behavior of ptracers_monitor when monitor output is written to a
1061      netcdf-file; still not independent of monitor.F (writes in the same
1062      file).
1063    o change default value of tRef (put a uniform, meaningful value for ocean
1064      & atmos) and initialize sRef (was missing, as Martin mentioned).
1065    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1066      to be proportional to enstrophy dissipation length.  Thus,
1067       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1068      This is now consistent with Smagorinsky and with the manual.
1069    
1070    checkpoint57u_post
1071    o OBCS and PTRACERS: add open boundary support for passive tracers
1072      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1073        OB-values from file; this is not different from the way theta and salinity
1074        are treated
1075      - however, Orlanski-radiation conditions are not supported, and the model
1076        will stop if you use pTracers and Orlanski at the same time.
1077      - beefed up the rountine obcs_external_fields_load: now only those open
1078        boundary values are overwritten with values from files for which there
1079        are really files, otherwise the OB-fields remain untouched. This makes
1080        it possible to use different OBs at different ends of the domain (as
1081        with EXF)
1082    o reduce number of exch calls in shap_filt (s2).
1083    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1084      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1085    
1086    checkpoint57t_post
1087    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1088    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1089      same truncation, independent of the face number: affects affects several
1090      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1091    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1092      note that biharmonic viscosity + no-slip was not tested in any experiment.
1093    o fix bug in non-linear free-surf side-drag ; generate new output for
1094      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1095    o make mnc honor the writeBinaryPrec flag for most kinds of output
1096    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1097    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1098      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1099    o add brackets in multi-terms sum to get same truncation, independent of
1100      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1101      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1102    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1103      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1104      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1105      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1106      Suggested values of viscosity parameters found in mom_calc_visc.
1107      Many new viscosity diagnostics available.
1108    
1109    checkpoint57s_post
1110    o Add clearing-house for viscosity calculations, mom_calc_visc and
1111      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1112      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1113      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1114      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1115      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1116      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1117      ViscAhStrain and viscAhTension are now retired.
1118    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1119    o In response to JMC's bug report, genmake2 now ignores any soft-links
1120      that it finds in the *current* directory when searching for files.
1121      Soft-links found in any other source directories will still work as
1122      they did before.
1123    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1124      a C routine to unlimit the stack size
1125    o mnc-ify pkg/aim snapshot vars
1126    o mnc-ify pkg/land as requested by Daniel
1127    o various changes to mnc including:
1128      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1129      - output can now be grouped so that all files within a group
1130          change the ITER portion of their names in lock-step together
1131      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1132          and works with both EXCH1 and EXCH2 (but needs more testing)
1133      - writing works for all verification test cases w/ g77 on Linux
1134    
1135    checkpoint57r_post
1136    o make MNC variable initialization happen earlier
1137    o add diagnostics for (almost) each term of the momentum Eq.
1138    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1139    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1140    o remove MINIMAL_TAVE_OUTPUT option ;
1141      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1142    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1143      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1144    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1145    o add time-dependent SST, SSS control
1146    o cost terms in ecco/ modularized (new cost_generic.F)
1147    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1148    o new infrastructure for seaice model vs. obs misfits in seaice/
1149      * driver from the_main_loop.F is seaice_cost_driver.F
1150      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1151      * gradient check in Exp. 6a of natl_box_adjoint/
1152    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1153      (see README file)
1154    
1155    checkpoint57q_post
1156    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1157    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1158      - bug was reported by Jean-Michel and Ian Fenty
1159    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1160      update exp. cpl_aim+ocn output.
1161    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1162      Needed for high-res. runs with large global files
1163      to be able to limit tapelev size
1164    o Changed some tests for adjoint:
1165      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1166      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1167      * global_ocean.90x40x15/ back to default 3-level checkpointing
1168    o Modifications to enable scripted COMMON to MODULE conversion
1169      * verification/OpenAD/code/ has necessary scripts and description;
1170      * converts, compiles and runs successfully;
1171    
1172    checkpoint57p_post
1173    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1174    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1175      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1176    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1177    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1178      (was already the case for dissipation with mom_vecinv,
1179       and also the case for grad.PhiHyd when staggered-timeStep)
1180      This will allow to put dissipation out-off the AB time-stepping.
1181     Unfortunately, affects truncation error. Update output of exp. that "fails"
1182      (cg2d matching number) and leave the others for later: front_relax(10),
1183      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1184      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1185    
1186    checkpoint57o_post
1187    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1188      (2) its ready to be documented during the 20050801 DocFest
1189    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1190      for ideal_2D_oce and lab_sea on linux_ia32_g77
1191    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1192      in global1x1_tot/code_seaice_adj to access indices 32, 33
1193      (worth another tag)
1194    
1195    checkpoint57n_post
1196    o adding precip control xx_precip 32
1197    o adding swflux control xx_swflux 33
1198    o Replacing 10 forcing penalty cost routines by 1 generic.
1199    o Implementing partitioning in time-mean and variable adjustment
1200      for atmos. state.
1201    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1202    o in natl_box_adjoint:
1203      * updated exp 1 to 10
1204        (but does not have time-mean vs. variable split results yet)
1205    o updated global1x1/*_seaice_adj/
1206      to incorporate latest changes
1207    o enable useSingleCpuIO for mdsio vector routines
1208      (applies in particular to tapelev I/O)
1209    o removed inefficient K-loop in all active_file*control*.F
1210    
1211    checkpoint57m_post
1212    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1213      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1214    o pkg/exch2: filling of face-corner halo regions is optional
1215      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1216    
1217    checkpoint57l_post
1218     tag before updating tutorials (pre-release-2)
1219    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1220       for output and interpolation of input fields onto model grid)
1221    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1222       Affects results of exp. rotating_tank ; update output.txt.
1223    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1224          and taking the square quantity and/or using a fraction-weight field.
1225    o fix aim_diagnostics_init.F mate numbers.
1226    o add mnc output capability to diagnostics/diagstat and update
1227      our cvsignore files for the ACSII output generated
1228    
1229    checkpoint57k_post
1230    o lab_sea now uses diagnostics package and provides a suite of
1231      new EXF diagnostics output.
1232    
1233    checkpoint57j_post
1234    o exf
1235      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1236        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1237        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1238      * extended diagnostics output
1239        - now includes all EXF variables
1240        - hs, hl moved to common block
1241        - separate S/R for diagnostics, called after ctrl vector is added
1242        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1243        - EXFqnet contains true Qnet (i.e. includes qsw)
1244      * updated verif. lab_sea, global_with_exf
1245      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1246        to ensure that diagnostics sees a true EXFqnet
1247    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1248    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1249      several times with different frequencies.
1250    o mnc-ify the thsice package as requested by Daniel Enderton
1251      - the monitor--MNC output needs work
1252      - many attributes need to be added (most are currently blank)
1253    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1254      - many attributes need to be added (most are currently blank)
1255    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1256    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1257    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1258      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1259         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1260    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1261     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1262    
1263    checkpoint57i_post
1264    o Diagnostics package was changed: diagnostic allocation is now deactivated
1265      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1266    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1267      add 1rst Order upwind vertical Shear.
1268    o add a quick fix for A/B checkpointing in OFFLINE mode
1269    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1270      end-run around the C/Fortran linking horror in eesup/src/timers.F
1271    o added pkg/runclock: allows user to terminate run based on wall clock
1272    o added non-hydrostatic scaling parameter: nh_am2
1273    o pkg/my82: futile attempt to make results compiler-independent by adding
1274      some "_d 0", etc. no effect.
1275    o for mnc output, fill the 'T' coordinate var with myTime and create a
1276      separate 'iter' variable for iteration count
1277    o pkg/diagnostics:
1278      add new capability: output of Global/Regional & per-level statistics ;
1279      tested against monitor output (including land & thSIce) on various exp.
1280    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1281    
1282    checkpoint57h_done
1283      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1284      data.diagnostics, data.gchem, data.ptracers) is done.
1285    
1286    o pkg/diagnostics: prepare for Global/Regional statistics.
1287      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1288    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1289      and rename it: DIFFERENT_MULTIPLE
1290    
1291    checkpoint57h_post
1292    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1293    o pkg/diagnostics: change output frequency, now in seconds (instead
1294      of Nb of iterations). This requires to change data.diagnostics.
1295    checkpoint57h_pre
1296    
1297    o in mnc, let the user create the output dir if both mnc_outdir_date
1298      and mnc_outdir_num are false
1299    o add fflags() to pkg/diagnostics which allows one to specify, on a
1300      per-file basis, the file precision [default behavior is unchanged]
1301    o added diagnostics to pkg/kpp, including computation of mixed layer
1302      depth based on a temperature/density criterion
1303    o updated verification/natl_box to test the new pkg/kpp diagnostics
1304    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1305    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1306    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1307      not mnc -- this mistake was found by JMC and is now corrected
1308    
1309    checkpoint57g_post
1310    o add Adams-Bashforth 3rd Order time stepping:
1311      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1312      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1313    checkpoint57g_pre
1314    
1315    o make lambda[Theta,Salt]ClimRelax spatially varying
1316      (default remains spatially uniform constant based on tau)
1317    o added new control variables
1318      * init. uVel, vVel, etanN
1319      * lambda[Theta,Salt]ClimRelax
1320    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1321      (suggested by G. Forget)
1322    
1323    checkpoint57f_post
1324    o add parameter "baseTime" = model base time = time at iteration zero
1325      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1326      account for baseTime shift
1327    o move Coriolis arrays from PARAMS.h to GRID.h
1328    checkpoint57f_pre
1329    
1330    o mnc-ifying the seaice package
1331    o introduced an alternative length scale calculation for use in the limiting
1332      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1333    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1334    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1335      as well as grad(vort3).  Made it compatible with both approximate form
1336      for the cubed sphere and full form of these gradients.  Added flag
1337      useFullLeith to select between approximate and full form.  
1338    o add "d0" in getcon.F to reduce differences between compilers/platforms
1339      update output.txt of exp. fizhi-gridalt-hs
1340    o change port_rand funtion to allow to set the seed.
1341    o fix obscure MNC bug involving conversion between reals and integers
1342      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1343        new version is now more standards-compliant
1344    o adjoint-related modifications
1345      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1346      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1347      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1348    
1349    checkpoint57e_post
1350    o Adding eddy stress controls a la Ferreira et al.
1351    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1352    
1353    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1354      update output.txt of exp. fizhi-gridalt-hs
1355    o add more "Z" dimensions and associated coordinate vars to MNC
1356    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1357    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1358      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1359      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1360      months and years.  Requires pkg/cal.
1361    o diagnostics: add pickup functionality
1362      - off by default for backwards compatibility
1363      - current version only uses MDSIO -- MNC will be added
1364    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1365    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1366    
1367    checkpoint57d_post
1368    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1369    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1370      output from the diagnostics package
1371    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1372    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1373      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1374    o add coordinate variables to the MNC output from the diagnostics package
1375    o change MNC-flags default value: true when useMNC=TRUE
1376    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1377      the ability (off by default) to read the grid information using MNC
1378    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1379    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1380    o do snap-shot diagnostics at the middle of the time-interval (instead of
1381      at the end).
1382    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1383      new test for AIM with thSIce + slab-ocean
1384    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1385    o move state variable diagnostics to the beginning of the time step ;
1386      (note: still needs some work specially for snap-shot diagnostics)
1387      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1388    
1389    checkpoint57c_post
1390    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1391    o generate new output.txt files on faulks with g77 & the new -ieee option
1392    checkpoint57c_pre
1393    
1394    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1395      update output.txt of exp. global_ocean.90x40x15
1396    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1397      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1398    o add saltFlux(+File) forcing capability with periodicExternalForcing
1399    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1400    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1401    o improvements for the MNC output from DIAGNOSTICS:
1402      - correct handling of the unlimitied dimension
1403      - all dims now have associated coordinate variables
1404      - variables located at U, V, and Corner ("Z") points are now written
1405        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1406        *all* data points are output
1407    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1408    o added pkg/seaice/seaice_monitor.F
1409    o mdsio_readfield.F can now read files visible only to master MPI process.
1410    o pkg/seaice: some test code for ice-modified ocean stress
1411    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1412      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1413      spurious negative numbers for precipitation and humidity.  Will cause
1414      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1415    o pkg/ctrl/
1416      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1417        May be enabled via doPackDiag
1418      *  introduce z-scaling of
1419         + gradient (doZscalePack) and
1420         + control (doZscaleUnpack)
1421    o pkg/mdsio/
1422      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1423      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1424    
1425    checkpoint57b_post
1426    o simplify options in diagnostics_fill arguments (remove weird combinations)
1427    o fix MNC coordinate variables so that they now contain per-face index
1428      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1429      general, EXCH2 grids are only aligned to a "local" coordinate system
1430    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1431    o Implement instantaneous output within pkg diagnostics:
1432      setting a negative frequency in data.diagnostics produces
1433     "snap-shot" output (as opposed to time-average if freq > 0)
1434    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1435      NOTE: change ptracer diagnostics name: use 2 characters to work with
1436            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1437    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1438      becomes the coordinate variable for the 'T' dimension
1439    o add CF-style coordinate variables to MNC
1440      - just a first cut:  numbers are meaningless on the cubesphere and
1441        missing along the T axis but otherwise it works!
1442    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1443    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1444    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1445      this is based directly on what the model compute, so that the content of
1446      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1447    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1448    o clean up build options files for SunOS, in particular
1449      - remove -traditional from xmakedepend
1450      - change -xarch=v9 to -xarch=native for f77
1451      - restore use of make (not gmake)
1452      - add CC=gcc if using g77
1453    o changes per discussion of AM, JMC, & EH3 today:
1454      - move redundant "grid" variables out of "state" -- in preparation of
1455        creating proper CF-style coordinate variables and in recognition
1456        that any/all grid variables can be easily copied (eg. w/NCO) from
1457        the grid files into any of the other NetCDF files
1458      - *always* output grid variables with MDSIO (this will eventually be
1459        changed)
1460      - output MNC grid file if useMNC is true
1461    o every instance of _END_MASTER() has been found and replaced with
1462      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1463      preprocessors
1464    o re-arrange diagnostics pkg initialisation:
1465     - allow each package to extend the available diagnostics list
1466     - add some checking and fix small problems (multi-threaded, ...)
1467     - new S/R diagnostics_fill (replace fill_diagnostics):
1468       look through the short list of active diag. (instead of the long list)
1469       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1470    
1471    checkpoint57a_post
1472    o this set of changes restores TAMC compatibility
1473      tested for global_ocean.90x40x15 adjoint on trough
1474      (what a pain)
1475    
1476    checkpoint57a_pre
1477    o some modifs in tools/build_options for sunos
1478    o call ctrl_pack for ctrl at end for optimcycle=0
1479    
1480    checkpoint57
1481    o add horizontal bi-harmonic viscosity for vertical velocity
1482      - new parameter viscA4W (defaults to viscA4)
1483      - affects only non-hydrostatic code
1484      - to be done: no-slip lateral boundary conditions
1485    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1486    o implement Implicit Vertical advection for pTracers
1487    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1488      (implemented also for implicit vertical diffusion & advection)
1489    o OBCS: extend application of tracer open boundary conditions
1490      to a strip beyond the boundary of width Olx/Oly
1491    o add call monitor to TAF set of required calls (flow directives)
1492      and include in natl_box_adjoint
1493    o untangle a few ifdefs related to cost, ctrl, autodiff
1494      untangel a few ALLOW_ECCO_OPTIMIZATION
1495    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1496      (theta2, salt2 in ecco_cost_weights)
1497    
1498    checkpoint56c_post
1499    o OBCS as control variables
1500      - update ctrl_ad_diff.list, obcs_ad_diff.list
1501      - remove balance of obcs controls from default
1502      - fix index bug nobcs in ctrl_init
1503      - fix dummy fields filen in ctrl_pack
1504      - add dummy weights for obcs
1505    o lsopt: comment out fort.94 output
1506    o optim:
1507      - remove unnecessary header files
1508      - adjusted namelists
1509      - add xerbla.F to Makefile
1510    o exf:
1511      - multiple modifications of exf_check_range
1512      - unit change in exf_init_runoff from [m/year] to [m/s]
1513    o mdsio:
1514      - i/o-vector change debugLevel from debLevA to debLevB
1515    
1516    checkpoint56b_post
1517    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1518      is called from DO_THE_MODEL_IO
1519      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1520      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1521      - clean up PTRACERS_WRITE_TIMEAVE a little
1522    o add another verification experiment that tests both the cfc-pkg and
1523      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1524      reactive tendencies treated inline with regular timestepping
1525    o testreport previously did a lousy job of comparing small numbers, so
1526      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1527      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1528      testreport.
1529    o ptracers_monitor: bug fix for MPI
1530    
1531    checkpoint56a_post
1532    o GCHEM: finish reorganizating the package
1533      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1534        (introduces another 3D-array for each passive tracer, but only if
1535        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1536        gchemTendency is not needed because the timestep is done separately)
1537      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1538      - GCHEM is now---more or less cleanly---separate from PTRACERS
1539      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1540        so clear to me how that should be done in a general way.
1541    o CFC: improve formatting of output in CFC_ATMOS
1542    o PTRACERS:
1543      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1544        that ALL experiments with ptracers enable can be checked. This makes
1545        GCHEM_MONITOR obsolete.
1546      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1547        monitorFreq
1548      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1549    o add PTRACERS (PTR0[1-5]) to testreport output
1550    o exf_check_range:
1551      * default changed to .TRUE.
1552      * will check values for niter0 if debLevA, every timestep if debLevB
1553      * STOP in exf_check_range if 'out of range'
1554      * range chosen generous to allow for potential extema
1555      TBD: a version with stricter range
1556           permitted range would be runtime parameters
1557    o GMredi:
1558      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1559      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1560      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1561    o GCHEM:
1562      - move call to GCHEM_FORCING_SEP, so that it is now called before
1563        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1564      - introduced a useGCHEM runtime flag and applied it everywhere.
1565      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1566        this flag is now only visible within GCHEM-pkg routines.
1567      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1568        be replaced by a 3D array that is computed before thermodynamics; for
1569        this, the tracer ID iTracer had to be included into the parameter list
1570        of ptracers_forcing
1571      - set up forward_step to call gchem_forcing, that will replace
1572        gchem_forcing_int in ptracers_forcing
1573      - cleaning up
1574    o small cleaning of exch2: remove files that are also in eesupp/src
1575    
1576    checkpoint56
1577    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1578    o mnc: cleanup "full" files--fixes out-of-memory problem
1579    o ECCO-GODAE
1580      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1581      * fully merged and updated from SIO code
1582        windstress sign change affects
1583        - exf_inscal_[u/v]stress
1584        - sign of xx_tau[u/v] adjustments
1585        - signs in cost_scat
1586      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1587      * natl_box_adjoint updated and compressed
1588      * 2-level checkpoint switch added
1589        (tested in EXP. 1 of natl_box_adjoint)
1590      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1591    o SVD
1592      * first complete, non-hacked version for SVD calculations
1593      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1594        performed via direct access files admtlm_vector.it????
1595        (via ctrl_[un]pack)
1596      * optimcycle is used for ARPACK iteration counter
1597        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1598      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1599        and add linear transforms where necessary
1600      * controls are initial/final SST, SSS (can be extended; need to check
1601        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1602    o mdsio: filename info to both stderr, stdout
1603    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1604      from sign change
1605    
1606    checkpoint55j_post
1607    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1608      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1609    o add consistent build directories and .cvsignore files to verification
1610    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1611    o make all subroutines 30 or less characters in length for certain older
1612      compilers to work (a thorough search only turns up two routines in
1613      pkg/ptracers)
1614    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1615      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1616    
1617    checkpoint55i_post
1618    o change arrays for total vertical diffusivity (2.D if explicit,
1619      3.D if implicit) ; each ptracer uses its own background value.
1620    o added mnc/NetCDF output capability to ocn_compon_interf
1621      - added bits to verification/cpl_aim+ocn so that it can run on
1622        ITRDA and other clusters without the mpirun "-wd" option
1623    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1624      configuration
1625    o give MNC the ability to create additional files rather than
1626      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1627      - the default is just less than 2GB which is a practical limit
1628        on many systems
1629    o Compute the non-local term using either KPP vertical diffusivity (=default)
1630       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1631    
1632    checkpoint55h_post
1633    o add verification test "vermix"
1634    o remove all the *_ioinc flags and replace with the single global
1635      outputTypesInclusive flag
1636    o allow to set a vertical profile of vertical diffusivity for T & S
1637    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1638    o useMNC moved from data.mnc to data.pkg
1639    
1640    checkpoint55g_post
1641    o Renaming carbon AD experiments to comply with testreport conventions
1642    o Updating adjoint of Held-Suarez hs94.1x64x5
1643    o Fixing directives for non-ECCO forward_step, after ECCO directives
1644      have been fixed to avoid recomp. of do_oceanic_phys
1645      Works well for global_ocean.90x40x15,
1646      but recomp. issue remains for carbon
1647    o Updating adjoint output for natl_box_adjoint after
1648      pkg/ecco has been modified (see taga c55d_post)
1649    
1650    checkpoint55f_post
1651    o rename to timeave_init_fixed
1652    
1653    checkpoint55e_post
1654    o some delicate re-shuffle of store directives to avoid one
1655      extra call of do_oceanic_physics
1656      affects ecco_the_main_loop.F, do_oceanic_physics.F
1657      checkpoint_lev1_directives.h
1658    o NB: this may break global_ocean adjoint temporarily,
1659      but it is clear how to fix it. Will do later, need this now.
1660    
1661    checkpoint55d_post
1662    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1663    o ecco_cost_weights is modified to 1x1 runs
1664    o modifs to allow observations to be read in as
1665      single file or yearly files
1666    o enable to read exf forcing fields as either
1667      single file or yearly files (flag useExfYearlyFields)
1668    checkpoint55d_pre
1669    
1670    o switch between 2-level and 3-level checkpointing
1671    o add ability of MNC to write local and "partial" (eg. 2D slices where
1672      the full 3D field is never actually stored) arrays to NetCDF files
1673      with the correct (that is, the complete multi-dimensional) set of
1674      array indicies
1675      - used in mom_vecinv() to write the diagFreq output
1676      - tested (demonstrated) in verification/aim.5l_cs
1677    o further mnc-ification
1678      - add verification/lab_sea to the list with mnc setups
1679      - fix undefined mnc v-names in cd_code
1680      - add kpp to mnc output (both snapshot and timeave)
1681    o non-hydrostatic code
1682      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1683        in calc_gw.F
1684      - defaults to viscAh
1685      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1686        friction or Leith) in non-hydrostatic mode, as long as there is
1687        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1688    o pkg/cost
1689      extend simple cost functions to treat time mean quantities
1690      (T,U,V) via cost_accumulate_state from cost_tile
1691    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1692        be 2 times larger than the minimum size the advection scheme requires.
1693        now get a perfect conservation of salt in advect_cs test-exp (updated)
1694    o GGL90 (Gaspar's TKE mixed layer)
1695      - add horizontal diffusion of TKE, requires exchanges in
1696        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1697        default. In OPA there is no horizontal diffusion of TKE but the
1698        mixing coefficients are computed from a horizontal average of TKE of
1699        6 points or so. I think that diffusion has a little more physical
1700        justification.
1701      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1702        was in vain)
1703      - mask tke-variable in ggl90_init
1704    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1705    o fix biharmonic diffusion on CS-grid.
1706    o more obcs stuff
1707      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1708        for reading boundary values. This routine is called from
1709        obcs_prescribe_read
1710      - updated obcs_check
1711      - changed sponge layer relaxation parameter units for days to seconds
1712      - turned off sponge layer by default
1713      - changed argument list of OBCS_CALC to myTime+deltaTclock
1714      - fixed about 35 bugs in obcs_external_fields_load
1715    
1716    checkpoint55c_post
1717    o obcs stuff
1718      - new runtime flags useOBCSprescribe, useOBCSbalance
1719      - re-arranged obcs_calc
1720      - moved exf_getobcs to obcs_prescibe_read
1721        obcs_prescibe_read is called after ORLANSKI stuff
1722        and independent of it (executable can contain all).
1723      - updated obcs_check
1724      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1725        These may be necessary only if tangential velocities are
1726        prescribed at OB, not sure, needs testing.
1727    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1728      which simplifies the calls and passes the ifc check-bounds test
1729    
1730    checkpoint55b_post
1731    o add a 2D scalar, Z location, exchange_2 routine.
1732    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1733      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1734      affects advect_cs results (for the wrong reason): update output.txt
1735    o use a more standard discretization for biharmonic viscosity ;
1736     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1737      affects results of dome set-up: update output.txt
1738    o fix gad_advection.F (CubedSphere part), back to version 1.23
1739    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1740    
1741    checkpoint55a_post
1742    o merged code to
1743      * prescribe/read time-dependent open boundaries
1744        (works in conjunction with exf, cal)
1745      * sponge layer code for open boundaries
1746      * each boundary N/S/E/W now has its own CPP option
1747        (healthy for the adjoint)
1748    
1749    checkpoint55
1750    o up-to-date adjoint of previous breaks
1751      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1752      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1753      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1754      - carbon: * remove tr1-related adjoint verification
1755                * add ptracer as control variable
1756    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1757      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1758    
1759    checkpoint54f_post
1760    o in verification/carbin/ remove experiment related to
1761      ALLOW_PASSIVE_TRACER (array tr1 etc)
1762      code_ad/ input_ad/ results_ad
1763    
1764    o add two new packages
1765      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1766        + subject to optimization (memory)
1767      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1768        + subject to reordering (many GOTOs in the original code)
1769        + so far opps is called for every (i,j) point, and then operates in
1770          the vertical; one may want to reorder the scheme in order operate in
1771          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1772          fields)
1773    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1774      - all verification tests compile and run with linux_ia32_g77
1775      - defaults are compatible with current input files--nothing
1776        should change if you were not previously using MNC
1777      - MNC output has been added in numerous places (eg. timeave)
1778        but there are still a few writes not yet do-able with MNC
1779        (this is in progress)
1780      - flags now allow for either/or/both use of MDSIO and MNC and
1781        documentation will soon follow
1782      - numerous small formatting cleanups for ProTeX
1783    o add version info (via BUILD_INFO.h) to MNC and stdout
1784    
1785    checkpoint54e_post
1786    o add two new packages
1787      - pp81 (Packanowski and Philander, 1981), Richardson number and
1788        stratification dependent mixing
1789      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1790      - these scheme operate in a similar manner as KPP (without ghat, of
1791        course), however there is only one diffusivity that is used for both
1792        temperature and salinity (and passive tracers)ç
1793    o add offline package
1794    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1795      provided by Stephanie Dutkiewicz
1796    o genmake2: add ability to search for C compilers and cleanup test output
1797      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1798    
1799    checkpoint54d_post
1800    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1801    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1802      leading to additional shift by 5 days each year of integration
1803       (i.e. leading to considerable offset over the years)
1804    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1805    o start with no AB and no initial filtering (staggerTimeStep):
1806      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1807    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1808      (external loading & cpl import/export stay in forward_step.F)
1809    o update coupling interface to work with new staggerTimeStep
1810    o change MDSIO ptracers_pickup.
1811    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1812    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1813    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1814    
1815    checkpoint54c_post
1816    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1817      this affects (truncation error) output.txt of test-exp:
1818       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1819    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1820    o change Qnet to always be the net heat flux, (+upward).
1821      affects (truncation error) output of natl_box exp.: updated
1822    o define the max number of passive tracers in PTRACERS_SIZE.h
1823    o start to test mnc routinely in exp0
1824    o add sea-ice loading (sIceLoad) as a new forcing field.
1825    
1826    checkpoint54b_post
1827    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1828       impressive on Altix and Opteron systems)
1829    o diagnostics can now write NetCDF files through the mnc package
1830    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1831    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1832    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1833      affects (truncation error) output of lab_sea & natl_box exp.: updated
1834    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1835    
1836    checkpoint54a_post
1837    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1838    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1839    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1840    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1841      + internal_wave (shift in writing cg2d_ini_res)
1842    checkpoint54a_pre
1843    
1844    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1845      - modified verification/lab_sea and natl_box_adjoint accordingly
1846    
1847    checkpoint54
1848    checkpoint53g_post
1849    o prepare splitting of thermodynamics: store convect.counter in common block
1850    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1851      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1852    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1853    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1854    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1855    o restore adjointability
1856    
1857    checkpoint53f_post
1858    o modifications that affect AIM experiment results (update output.txt):
1859      - no advection of S at top interface Nr (pkg/generic_advdiff)
1860      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1861    o AIM pkg:
1862      - include stability function into surf.Flux derivative relative to Tsurf
1863      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1864    
1865    checkpoint53e_post
1866    o merged cylindrical coord configuration
1867    o added rotating_tank experiment
1868    checkpoint53e_pre
1869    
1870    checkpoint53d_post
1871    o faulks upgraded: re-generate output.txt that have changed:
1872       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1873    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1874    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1875    o added Sadourny discretization of Coriolis
1876      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1877      - re-enabled use of omega3 (useAbsVorticity)
1878    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1879      vector-invariant equations
1880      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1881    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1882      hopefully without new bugs
1883      - still to do: biharmonic friction for non-hydrostatic w
1884    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1885    o regenerated output for global_ocean_ebm (using -ieee)
1886    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1887      of mom_common/
1888      - simple re-arrangement of instructions within computing loop
1889    checkpoint53d_pre
1890    
1891    checkpoint53c_post
1892    o new version of coupler for AIM+thSIce and Ocean models
1893     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1894     - land: change Evaporation of snow
1895     - aim with thSIce: fix bug in snow-precip.
1896    o changes to calc_gw.F
1897     - bug fix for w^2 term near the bottom boundary
1898     - (hopefully) improve the lateral slip boundary condtions for use with
1899        partial/looped cells
1900      - because the bug fix changes two verification experiments anyway (exp5
1901        and plume on slope), change the lateral boundary condition from half slip
1902        to the value of no_slip_sides
1903    o ebm package wasnt quite up to the parallel task. Fixed that.
1904    o Adjoint of EBM package + verification
1905      * TLM OK
1906      * ADM not sufficient accuracy yet (needs further testing)
1907    
1908    checkpoint53b_post
1909    o Commiting new energy balance model to repository
1910      * package is pkg/ebm
1911      * verif. is verification/global_ocean_ebm
1912      * references are in ebm_driver.F
1913    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1914    C        Global thermohaline circulation. Part I:
1915    C        Sensitivity to atmospheric moisture transport.
1916    C        J. Climate 12(1), 71-82
1917    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1918    C        Global thermohaline circulation. Part II:
1919    C        Sensitivity with interactive transport.
1920    C        J. Climate 12(1), 83-91
1921    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1922    C        Destabilization of the thermohaline circulation
1923    C        by atmospheric eddy transports.
1924    C        J. Climate 7(12), 1870-1882
1925    o Will need long integration testing.
1926    checkpoint53b_pre
1927    
1928    o created pkg/mom_common in preparation for variable viscosity code
1929    o renamed and split ini_mnc_io
1930    o pkg/land: only liquid water can diffuse or run-off
1931    o AIM using land: soil wetness availability account for snow
1932    o added printMapIncludesZeros to EEPARMS namelist
1933    
1934    checkpoint53a_post
1935    o restore TAMC compatiility for exf_constants.h
1936      (no usage of _d in .h)
1937    o Additional storing in KPP in an attempt to fix
1938      TAMC problem with adjoint of KPP code.
1939      (no success...)
1940      Identical code works fine with TAF.
1941    o Fixed verification/natl_box_adjoint experiments.
1942      Initial conditions for Experiments 4 and 5 are now
1943      set to "SEAICE_initialHEFF=0", which is more reasonable,
1944      and hence gives results closer to that of Experiment 2.
1945      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1946    
1947    checkpoint53
1948    o stable checkpoint with up to date adjoint
1949      TLM tests only run for 1st grdchk at the moment. Its unclear if
1950      this is a code problem or a problem with resetting code for g_
1951      variables that is being autogenerated wrong.
1952      Otherwise:
1953       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1954       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1955         are both still in chaos following their security messes.
1956    
1957    checkpoint52n_post
1958    o various build (mostly genmake2) changes including:
1959      - ability to build/run more easily within Cygwin and MacOS X
1960      - more complicated Makefiles with a stronger dependence on Gnu Make
1961    o pkg/seaice modifications
1962      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1963        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1964        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1965      - changed proxy for geostrophic velocity and updated
1966        verification/lab_sea/results/* accordingly
1967      - removed ADI dynamic solver from pkg/seaice
1968      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1969        they caused a segmentation fault under certain circumstances
1970      - removed unused field WATR
1971    o bug fix in exf-package:
1972      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1973         now reflect that.
1974    o small fixes in the cal-package:
1975      - set reference date to first of January for the 'model'-calendar
1976      - failing of cal_CheckDate in cal_FullDate now actually results in a
1977        warning
1978    o small modifications in exf-package to increase flexibility:
1979      - change climtempfreeze from a constant to a runtime parameter that
1980        is specified in data.exf_clim (default = -1.9)
1981      - introduce runtime parameter windstressmax (default = 2.0) that is
1982        specified in data.exf
1983    o fix in pkg/thsice:
1984      - update Evap (Tsf changes) to be consistent with Latent heat flux
1985      - maintain snow precipitation unchanged (even if Tsf >=0).
1986     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1987    
1988    checkpoint52m_post
1989    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1990      this does not change any of the results, because myIter=0 in swfrac always
1991      lead to jwtype=2 (the default anyway), but the call makes little sense
1992      as a default
1993    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1994    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1995      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1996    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1997    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1998    o extending useSingleCpuIO option to work with new exch2 I/O format
1999      - old-style, missing-tile I/O is still accessible by defining CPP
2000        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
2001    o monitor package can write to NetCDF files and/or STDOUT
2002    o fix re-definition bug in MNC_GRID_INIT_ALL()
2003    o doc/api_reference added
2004      - a framework for building an API Reference Manual using all
2005        the "protex" comments embedded in the code
2006      - see pkg/generic_advdiff, pkg/mnc for examples
2007    o MNC:
2008      - make myThid the last argument for all subroutines
2009      - new default for the grid files: NO halos
2010      - add useMNC and other run-time flags
2011      - separate per-file-group handling of the unlimited dimension
2012      - early initialization of MNC w/ flags read at the eeboot stage
2013        and lookup tables set in initialize_fixed
2014      - write all MNC output to a freshly-created directory
2015    o thermodynamics sea-ice (thsice) is now tested with testreport.
2016    o test exp. advect_cs: use the standard cs32 grid ; update output.
2017    o Added functionality to grdchk:
2018      pick global i,j,k position (or nearest wet) where to perform check.
2019    
2020    checkpoint52l_post
2021    o new land formulation:
2022      a) use ground enthalpy as prognostic variable to ensure exact
2023         energy conservation.
2024      b) account for water temperature and for latent heat of freezing
2025         in all processes (rain, run-off, ground storage)
2026      c) compute surface and ground temperature implicitly.
2027    o aim_v23 modification for new land model:
2028      a) Treat separately land / ocean / sea-ice surface fluxes
2029         to allow implicit computation of land & sea-ice surface temp.
2030      b) add snow precipitation.
2031    checkpoint52l_pre
2032    
2033    o fix problem (when 1 tile is empty) in min/max monitor.
2034    o fix bug in timeAve (u,vZetatave in common block)
2035    o no restoring terms under ice for pkg/seaice
2036    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
2037    o bug fix for pkg/seaice pickups
2038    o change MNC call locations and add coordinate attributes
2039    o mask vorticity at the corner ; affects global_ocean.cs output
2040    o fix ini_curvilinear_grid ; test CS experiments with mpi
2041    o aim.5l_cs: modify sea-ice fraction input file ; update output
2042    o exf: Adding simple range check routine for exf fields after read
2043    
2044    checkpoint52k_post
2045    o removed top-level directory "diags"
2046      - we migrated these functions to pkg/timeave a long time ago
2047    o fixed bug introduced in pkg/monitor
2048    o accuracy ctrlprec = 32 insuffient for gradient checks using
2049      averaged fields (I/O via cost_averages)
2050      -> use ctrl.h in active_file*.F to control I/O precision.
2051    o paramter list of CALL ADTHE_MAIN_LOOP
2052    o added initial do_the_model_io to ecco
2053    o set all ...Freq to zero after cost_final
2054      taveFreq, dumpFreq, pChkptFreq
2055    o MAIN and ECCO differentiability restored
2056    
2057    checkpoint52j_post
2058    o fix nchklev in tamc.h for global_ocean...
2059    o Bringing flow and store directives up-to-date
2060    o Really weird thing!
2061      call do_the_model_io from the_main_loop with parameters
2062      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2063      TAF places a faulty re-call of initialise_varia
2064      after cost_final call which should not be there!
2065    checkpoint52j_pre
2066    
2067    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2068      error messages
2069    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2070    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2071      debug output
2072    o modfied mdsio_writefield.F to handle non-global files under exch2
2073    o update AIM Cubed-Sphere exp (aim.5l_cs):
2074      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2075    o update AIM Equatorial Channel exp:
2076      use standard aim_v23 pkg and change the SST fields to be more realistic.
2077    o globalFile now works with exch2
2078    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2079      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2080    o limit timeave output for hi-res integrations
2081    
2082    checkpoint52i_post
2083    o removed CPP_EEOPTIONS.h from verification/*/code
2084    o updated the tiling for global_ocean_pressure
2085    checkpoint52i_pre
2086    
2087    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2088      the old pkg/aim).
2089    
2090    checkpoint52h_pre
2091    o shortened offending lines in exch2_send_rx?.template
2092    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2093    o genmake2: add build & execute test for NetCDF code
2094    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2095      old grid files, moved CPP_EEMACROS.h to pkg/exch2
2096    o added useSingleCPUIO flag to monitor.F and mon_out.F
2097    o added temporary hack for sea-ice dynamics on the cube:
2098      metric terms are ignored and it is assumed that
2099      there is no sea-ice on cube faces 1, 2, 4, and 5.
2100    
2101    checkpoint52f_post
2102    o added exch2 cube routines to pkg/exch2
2103    o modified hs94.cs-32x32x5 to use it
2104    o added new grid files to hs94.cs-32x32x5
2105    checkpoint52f_pre
2106    
2107    checkpoint52e_post
2108    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
2109      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
2110    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
2111      to work with implicit vertical advection and AB ;
2112    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
2113    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
2114     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
2115    checkpoint52e_pre
2116    
2117    o fix bug in impldiff when Nr=1 or Nr=2.
2118    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
2119    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
2120    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
2121      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
2122    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
2123    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
2124    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
2125    
2126    checkpoint52d_post
2127    o re-tiled many expts to allow comparison in multi-processor mode
2128      - updated output accordingly
2129      - changed hs94.128x64x5 to use intial T from file rather than use the
2130        random number generator
2131    o add infrastructure in model routines for fizhi and gridalt packages
2132    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
2133    o changes to permit hi-res, cubed-sphere, configuration
2134      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
2135      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
2136      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
2137        of surface winds for the cube
2138      (A verification experiment, based on global_ocean.cs32x15, but with
2139       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
2140       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
2141       complete with example surface forcing files and matlab scripts to look
2142       at the output and compare it with that of global_ocean.cs32x15.)
2143    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
2144       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
2145       to conform to the common rule.
2146    o check-in the first version of the coupler + interfaces for multi-components
2147       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
2148       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
2149       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
2150       - ocean and atmos. share the same horizontal grid (no interpolation).
2151       - exchanges between component and coupler is done in forward_step
2152    o new verification experiment, cpl_aim+ocn:
2153       coupled ocean - AIM atmosphere on cs32 grid.
2154    
2155    checkpoint52d_pre
2156    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2157    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2158    
2159    checkpoint52c_post
2160    o Fixing OPTIONS files for use of exf:
2161      - ALLOW_ECCO not needed
2162      - ECCO_CPPOPTIONS.h should not be included from
2163        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2164        as has been the case in the past
2165      - All cal/exf related options are currently set in
2166        single header file. Should remain so until we
2167        agree on a consistent new policy.
2168    o Removed all CPP options for cal package.
2169      cal has no more CPP options.
2170    o modified STOREs in GAD_ADVECTION
2171    o corrected key comp. for passkey
2172    
2173    checkpoint52b_post
2174    o new version: "thsice" of thermodynamic sea-ice pkg:
2175     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2176     - modify fluxes but do not change theta directly;
2177     - light cleaning of bulk_force pkg (still needed with thsice).
2178     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2179       + output_thsice.txt to test thsice & bulk_force pkgs.
2180    o put back grid & coriolis monitor output.
2181    checkpoint52b_pre
2182    
2183    o call "do_the_model_io" at the beginning (=> dump initial state)
2184    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2185    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2186      (need info on NUMBER_OF_PTRACERS)
2187    o missing PTRACERS headers in some routines
2188    o default tamc.h in pkg/autodiff supposed to crash
2189      to ensure proper customization
2190    
2191    checkpoint52a_post
2192    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2193      - moved surfaceTendencyTice from pkg/seaice to main code
2194      - subroutine FREEZE_SURFACE now limits only surface temperature
2195        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2196        => new output.txt for global_ocean.cs32x15 & global_with_exf
2197      - keep the old version of FREEZE for backward compatibility;
2198        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2199      - corresponding modifs for TAF directives
2200    o added surface flux output variables to TIMEAVE_STATVARS
2201    o time-averaged output for pkg/ptracers
2202    o fix problem with ECCO-related divided adjoint
2203      snapshot file was missing some ad-variables,
2204      but no warning issued by TAF
2205    
2206    checkpoint52a_pre
2207    o some bug fixes for #undef REAL4_IS_SLOW
2208    
2209    checkpoint52 = ecco_c52_e35
2210    o after testing adjoints of checkpoint51u_post
2211    
2212    checkpoint51u_post
2213    o this is the post-merge tag of the ecco-branch
2214      (needs another clean checkout and re-testing)
2215    o various natl_box_adjoint configs and results
2216      but no input fields
2217    o obcs adjoint not yet merged!
2218    o adding ECCO global 1x1 and 2x2 degree configs
2219    o updated/extended some store directives for seaice
2220    o pkg/ecco now containes ecco-specific part of cost function
2221    o top level routines the_main_loop, forward_step
2222      supersede those in model/src/
2223      previous input data.cost now in data.ecco
2224      (new namelist ecco_cost_nml)
2225    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2226    
2227    checkpoint51t_post
2228    o this is the pre-merge tag of the ecco-branch
2229    
2230    checkpoint51s_post
2231    o cleanup: removed various obsolete #define-s
2232    o pkg/grdchk
2233      - renamed 'ph-grd 3' to 'grad-res'
2234      - merged from ecco-branch
2235        (remaining bug fixes for obcs gradient checks)
2236      - additional high-precision output for testreport
2237        (grep for 'precision_grdchk_result')
2238    
2239    checkpoint51r_post
2240    o cleaned up or removed CPP_OPTIONS.h files
2241    o updated results for some of the tests to reflect the new
2242      optfiles (-ieee: -O0 instead of -O3)
2243    
2244    checkpoint51q_post
2245    o cd_code:
2246      - moved cd_scheme.F -> cd_code_scheme.F
2247      - separate read_checkpoint from cd_code_ini_vars.F
2248      - separated cd_code part from write_checkpoint
2249      - updated AD_SOURCE, generated .flow
2250      - added CD_CODE_VARS.h to the_main_loop
2251      - Moving cd_code specific store dir.s to pkg/cd_code
2252    o ctrl package totally restructured
2253      - pack/unpack now optional and decoupled from
2254        xx_/adxx_ I/O
2255      - ctrl_pack/unpack cleaned
2256        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2257      - confined inclusion of AD_CONFIG.h to where necessary.
2258    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2259    
2260    checkpoint51p_post
2261    o create initial cd_code package
2262      - WARNING: the initialization of fields within packages
2263        is broken because INI_FIELDS (where READ_CHECKPOINT is
2264        called) is called *before* PACKAGES_INIT_VARIABLES.
2265        This seems to be backwards since
2266        1) its important to initially zero the entire field including
2267           the "halo" region
2268        2) zeroing needs to be done *before* reading pickup info
2269           and the pickup call might or might not happen in any
2270           particular run
2271      - this needs an overhaul for R2
2272    o cleanup verification/*/code/GMREDI_OPTIONS.h
2273    o cleanup testreport
2274    
2275    checkpoint51o_post
2276    o bringing AD-related verif's up to date with genmake2
2277      - carbon/
2278      - global_ocean.90x40x15/
2279      - hs.94.1x64x5/
2280      - (front_relax/ )
2281    o (more) consistent directory structure for AD-related verif.'s
2282    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2283    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2284    o bug fix in find_alpha.F for MDJWF:
2285      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2286        change rho -> rho-rhoConst
2287      - replace call find_rho to find_rhonum
2288    o initialisation of rFlx extended to full array (required by TAF)
2289      and shifted to thermodynamics
2290    o removed PTRACERS.h in ptracers routine
2291    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2292    o Correcting initialisations for fVerU, fVerV.
2293    o helping TAF to recognize dependency on kUp for
2294      fVerU, fVerV
2295    o Replacing delZ by delR in pkg/ctrl/
2296    checkpoint51o_pre
2297    
2298    o undid all of cp51 pending some cleanups and discussion
2299    o added the [#include "AD_CONFIG.h"] statement to all files that need
2300       it for adjoint/tl #defines
2301     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2302     o removed tools/genmake since it no longer works
2303    
2304    checkpoint51n_post
2305    o modifications to make FREEZE flux visible to pkg/kpp
2306      - moved surfaceTendencyTice from pkg/seaice to main code
2307      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2308      - subroutine FREEZE now limits only surface temperature
2309        (this means new output.txt for global_ocean.90x40x15,
2310         global_ocean.cs32x15, and global_with_exf)
2311    o added surface flux output variables to TIMEAVE_STATVARS
2312    
2313    checkpoint51n_pre
2314    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2315    o added [#include "AD_CONFIG.h"] to all files that use the following
2316      defines:
2317      - ALLOW_ADJOINT_RUN
2318      - ALLOW_TANGENTLINEAR_RUN
2319      - ALLOW_ECCO_OPTIMIZATION
2320    
2321    checkpoint51m_post
2322    o incorporating changes to get TAMC/TAF working in genmake2
2323      - added new TAMC/TAF targets to the Makefile
2324      - various cleanups related to package handling
2325      - these changes should have no impact on the forward model
2326    
2327    checkpoint51l_post
2328    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2329     - faster algorithm for cal_addtime.F
2330     - higher precision arithmetic, where needed
2331     - pkg/exf *startdate variables changed from calendar date to
2332       model integration time
2333    
2334    checkpoint51l_pre
2335    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2336    o enable to apply restoring on S & T only in a latitude band.
2337    o update output (external_forcing_surf modif. change truncation errors)
2338       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2339    
2340    checkpoint51k_post
2341    o change default to: useNHMTerms=.FALSE.
2342     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2343       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2344     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2345        exp1, ideal_2D_oce
2346     - change data file of oceanic exp (leave the results unchanged for now)
2347       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2348    o set gravitySign automatically according to the vertical coordinate used
2349      (and change sign: back to "logical" value: +1 when R increases downward)
2350    o added an include barrier to the default CPP_OPTIONS.h and
2351      removed the #include "PACKAGES_CONFIG.h" from it
2352    o fix a bug in mom_fluxform (from chk51j_post)
2353    
2354    checkpoint51j_post
2355    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2356    o adjusted some flow directives (dynamics, thermodynamics)
2357    o added cubed-sphere case to test cost function
2358    o heckpoint_lev?_directives.h now include
2359      pkg-specific directives, whenever those are enabled.
2360    o Moving pkg-specific flow directives to corresponding pkg
2361      Moving pkg-specific differentiation list to corresponding pkg
2362      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2363      ---> conventions are
2364           - pkg_ad.flow
2365           - pkg_ad_diff.list
2366           - pkg_ad_check_lev?_dir.h
2367    
2368    checkpoint51i_post
2369    o merge of the branch-genmake2
2370      - knowingly breaks the older genmake
2371      - automatic generation of all ALLOW_${PKG_NAME} defines
2372      - new testreport supersedes older testscript
2373    o large number of package inclusion and header cleanups
2374    checkpoint51i_pre
2375    
2376    o new output for adjoin of global ocean vector invariant
2377    o fix for checkpoint of thermodynamic seaice and bulk_force
2378    o Steph gchem various cleanups
2379    
2380    checkpoint 51h_pre
2381    o fixed some single quotes
2382    o modify gchem pkg to be more versatile
2383    o modifications to clean up dic pkg
2384    o add pkg/cfc
2385    
2386    checkpoint51g_post
2387    o provide links for ARPACK and ADM*TLM
2388    o start removing verification/vero/
2389    o update AD-related stuff
2390      (in particular some IF-statements in model/src/ routines)
2391    o adding to verification/global_ocean.90x40x15/ adjoint of
2392      vector invariant setup
2393    
2394    checkpoint51f_post
2395    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2396    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2397      of tracer Green's fucntions for ocean inversion project.
2398    
2399    checkpoint51f_pre
2400    o Added on-the-fly spatial interpolation capability
2401        "USE_EXF_INTERPOLATION" to pkg/exf.
2402      - This is a temporary Cartesian-grid hack until
2403        the super-duper ESMF coupler becomes available.
2404      - See verification/global_with_exf/README for usage example.
2405      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2406        flags and modified pkg/seaice accordingly.
2407    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2408        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2409        non-local transport term.
2410    
2411    checkpoint51e_post
2412    o pkg/mom_vecinv:
2413      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2414      - add time-ave diagnostic of vorticity advection.
2415    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2416    o atmospheric geopotential: - include water vapor effect;
2417                                - use p^kappa in p* scaling.
2418    o land pkg: read initial state from files.
2419    o AIM : add stratospheric drag in the upper level
2420    
2421    checkpoint51d_post
2422    o change function ILNBLNK (=> last non-blank char.) to return zero
2423      (instead of the string length) when the string. char is empty
2424    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2425    o modif's to restore TAMC compatibility
2426      - avoid "_d" constructs in PARAMETER declarations
2427      - avoid interrupting lines by comment lines
2428    o Use cluster local disks for purely local I/O
2429      vs. globally visible disks needed for ctrl stuff
2430      (merged from ecco-branch)
2431      - new active_file_loc... and mdsio_..._loc routines
2432      - affected packages: autodiff, ctrl, grdchk, mdsio
2433    
2434    checkpoint51c_post
2435    o introducing integer flag debugLevel
2436      - debLevZero: suppress all output
2437      - debLevA: standard
2438      - debLevB: equivalent to current debugMode=.TRUE.
2439    o introducing pathname variable mdsioLocalDir for mdsio
2440      that can be specified at runtime
2441      (relevant for cluster I/O to local disk)
2442    `
2443    >>>checkpoint51b_post
2444    adjoint of ptracers
2445    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2446    o extended state in checkpoint_lev?, etc.
2447    o alternative ctrl/cost with tr1 or ptracer
2448    o new comlev1_bibj_ptracers
2449    o new ptracers.flow
2450    o made ptracers_forcing same as external_forcing_s
2451    o added verification for adjoint with ptracers
2452      - adm. grdchk fail so far
2453      - tlm. grdchk OK
2454      - checked tapelev/comlev recomputations: OK
2455    <<<checkpoint51b_pre
2456    
2457    checkpoint51a_post
2458    o added code for biogeochemistry package
2459      - new pkgs: dic, gchem
2460      - new subroutine in ptracers
2461    o modify code for biogeo packages
2462      - in model/src and pkg/ptracers
2463    
2464    checkpoint51
2465    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2466      - autodiff, ctrl, exf, grdchk, seaice
2467      kept separate packages
2468      - cost, ecco, obcs
2469    o updating verification/internal_wave, verification/lab_sea
2470      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2471    
2472    checkpoint50i_post
2473    o Preparing next differentiable checkpoint and sync
2474      of MAIN vs. ecco-branch
2475      - 1st step: this one is differentiable
2476      - 2nd step: next(! not this) checkpoint will have updated packages
2477                  from ecco-branch)
2478    
2479    checkpoint50h_post
2480    o new package "land": provide surface BC for AIM.
2481    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2482    o AIM: use true log-P extrapolation for near surface temp (= as in
2483        F.Molteni paper) ; update aim.5l_cs output.
2484    o New variable in PARM03 for more flexible pickups
2485    o somewhat cleaned package initialisation sequence for
2486      ctrl/ cost/ ecco/ in packages_... routines
2487    
2488    checkpoint50g_post
2489    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2490      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2491      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2492        made the default because of faster convergence than ADI
2493    
2494    checkpoint50f_post
2495    o exf totally restructured
2496      - replaced all exf_set_ routines by one generic exf_set_gen.F
2497        and made sure it's still differentiable
2498      - split exf_getffields.F into new exf_bulkformulae.F
2499      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2500      - updated adjoint/makefile and relevant verif. accordingly
2501    
2502    checkpoint50f_pre
2503     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2504          + change Evap over land. (update aim.5l_cs output)
2505     o added missing .cvsignores and made uniform across expts
2506     o changed configuration of tidal_basin_2d expt
2507     o added pkg/debug functions for tracing code in fatal crashes
2508     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2509     o new fn in pkg/monitor to stop model if solution grows too big
2510     o removed lots of single quotes from comments
2511    
2512    checkpoint50e_post
2513    o make KPP work with PTRACERS
2514     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2515       nearly a copy of kpp_transport_s
2516     - there is no analogue to SurfaceTendencyS, so I have to use
2517       gPtr(of the surface layer) instead
2518    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2519    checkpoint50e_pre
2520    
2521    checkpoint50d_post
2522    o change kpp output from multiple-record state files to single-record state
2523      files analogous to write_state.F
2524    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2525      analogous to the cg2d-related output.
2526    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2527      so that writing to internal file fn (with length 512) fails.
2528    checkpoint50d_pre
2529    
2530    checkpoint50c_post
2531    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2532    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2533    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2534    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2535    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2536    
2537    checkpoint50c_pre
2538    Merging from release1_p13:
2539    o bug fix for pkg/seaice dynamic solver
2540    o Added SEAICE_initialHEFF to pkg/seaice
2541    
2542    checkpoint50b_post
2543    o store u*,v* in gU,V instead of in guNm1,gvNm1
2544    o in order to put the momForcing out of the Adams-Bashforth:
2545      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2546      to timestep.F
2547    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2548    o re-generate output for highly sensitive test-exp:
2549       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2550    
2551    checkpoint50b_pre
2552    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2553    o corrected CPP option mismatch in exf_Bulk... functions for case
2554      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2555    
2556    checkpoint50a_post
2557    o Bug fix for merging between c50 and KPP.
2558      ikey was passed from thermodynamics to kpp_calc via
2559      common block rather than being recomputed in kpp_calc,
2560      in contradiction with new key itdkey.
2561      New key ikppkey created, and tamc.h headers updated.
2562    
2563    checkpoint50
2564    - 2nd step of merge with ecco-branch:
2565      merge changes in ecco-branch back into main trunk
2566    - bug fix in find_alpha
2567    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2568    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2569    - merged some sliced AD support routines
2570    
2571    checkpoint49
2572    merged from ecco-branch:
2573    o exf:
2574      - Enable initialisation of forcing fields to constant
2575        (runtime) values.
2576      - in exf_getffields.F
2577        Reduce i-/j-loop to interior domain, discarding overlaps.
2578        That also fixes wrong TAF-key computations for key_1, key_2
2579        with bulf formulae.
2580      - exf_init.F modify #ifdef for exf_init_evap
2581      - exf_getffieldrec.F, ctrl_getrec.F
2582        The following INT-usages are not safe:
2583          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2584          fldcount = int(fldsecs/fldperiod) + 1
2585        and were modified.
2586    o autodiff: checkpoint_lev...
2587      - updated storing for bulk formulae (some arrays were missing)
2588      - added state for seaice package
2589      - synchronized with main branch
2590    o DIVA:
2591      Modif.s in
2592      - the_main_loop.F
2593      - the_model_main.F
2594      and added cost_final_restore.F cost_final_store.F
2595      o With these changes, it is possible to fully separate
2596        the first forward run to compute the cost function (mdthe_main_loop)
2597        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2598        into separate model executions.
2599        This enables better tuning of DIVA to given queue sizes.
2600      o Loss of cost function value in consecutive DIVA runs is
2601        fixed by storing to 'costfinal' file.
2602      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2603        beginning/end of adjoint integration is accounted for.
2604      The current changes apply to TAF-1.4.26.
2605      TAF has one remaining bug, requiring one manual change
2606      (see MITgcm manual).
2607    o cal: synchronized between MAIN and ecco-branch
2608    
2609    checkpoint48i_post
2610    o Changes to restore differentiability of code w.r.t. previous tag
2611      (mostly adding new routines to make list and replacing
2612      pressure by totPhiHyd).
2613    o Updated and merged grdchk package
2614      - has both ADM and TLM checks
2615      - works for single- and multi-proc.
2616      - output cleaned
2617      - worked successfully for parallel DIVA
2618    o genmake:
2619      - Adding -platform=SP4
2620      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2621    o Modif. for DIVA:
2622      ctrl_unpack should not be called in intermediate DIVA interval.
2623      (similar thing would apply for active files such as
2624      tbar, sbar, psbar, which should not be reinitialised;
2625      only relevant for ecco-branch)
2626    
2627    checkpoint48h_post
2628    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2629    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2630    o Added SEAICE_initialHEFF to pkg/seaice
2631    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2632    
2633    checkpoint48g_post
2634    --- EOS:
2635    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2636      store total Potential in totPhyHyd for diagnostics & EOS.
2637    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2638    --- Pressure/geopotential gradient:
2639    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2640    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2641      ( changes results of global_ocean_pressure )
2642    o NLFS + z-coord.: add eta*Rho' contribution.
2643    o accurate phiHyd when using interface-W at the middle between 2 centers
2644     ( changes results of ideal_2D_oce )
2645    o includes r* 2nd term in potential gradient.
2646    
2647    checkpoint48f_post
2648    Merging from release1_p12:
2649    o Modifications for using pkg/exf with pkg/seaice
2650      - improved description of the various forcing configurations
2651      - added basic radiation bulk formulae to pkg/exf
2652      - units/sign fix for evap computation in exf_getffields.F
2653      - updated verification/global_with_exf/results/output.txt
2654    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2655      (SBO) core products, including oceanic mass, center-of-mass,
2656      angular, and bottom pressure (see pkg/sbo/README.sbo).
2657    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2658      to avoid negative values in shallow regions.
2659      - updated verification/natl_box/results/output.txt
2660      - updated verification/lab_sea/results/output.txt
2661    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2662    o Added useSingleCpuIO option (see PARAMS.h).
2663    o Updated useSingleCpuIO option in mdsio_writefield.F to
2664      work with multi-field files, e.g., for single-file pickup.
2665    o pkg/seaice:
2666      - bug fix in growth.F: QNET for no shortwave case
2667      - added HeffFile for specifying initial sea-ice thickness
2668      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2669    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2670      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2671    o pkg/seaice:
2672      - adjoint-friendly modifications
2673      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2674    
2675    checkpoint48e_post
2676    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2677    o dynamics: change definition of computational domain & adapt mom_fluxform
2678      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2679    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2680        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2681        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2682        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2683        inverted_barometer solid-body.cs-32x32x1
2684      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2685    
2686    checkpoint48d_post
2687    o in preparation for r*:
2688     a) use pre-computed gradient of hydrostatic potential:
2689        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2690     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2691        => affects results of glob_oce_pressure (different truncation error)  
2692      update output.txt of ideal_2D_oce & global_ocean_pressure
2693    
2694    checkpoint48d_pre
2695    o in preparation for r*:
2696      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2697      pass the 2 comp. of the grad. as arguments to momentum S/R.
2698      but for the moment, only used if it does not change the results.
2699    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2700    
2701    checkpoint48c_post
2702    Modifications in treatment of initial flux forcing controls
2703    to avoid extra storing of flux fields.
2704    
2705    checkpoint48c_pre
2706    o Added tidal_basin_2d experiment (currently 1D!)
2707    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2708    
2709    checkpoint48b_post
2710    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2711     (modification to pressure gradient not yet implemented)
2712    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2713      (for U & V) that are used for vertical advection of momentum.
2714    
2715    checkpoint48a_post
2716    o In preparation for r*, use temp. array to compute vertical transport
2717       in flux-form momentum pkg. => change results of few test-exp.
2718      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2719                        lab_sea, natl_box & plume_on_slope
2720    
2721    checkpoint48
2722    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2723    
2724    checkpoint47j_post
2725    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2726    o moved adexch from forward_step to addummy_in_stepping
2727    o added exch in ctrl_map_...
2728    o aveFreq.=0. at end of cost_final to avoid overwrite in
2729      reverse checkpointing loop
2730    o Yet more changes in gmredi:
2731      * adgmredi_calc_tensor
2732        avoiding all recomputation of gmredi_slope_limit
2733      * adgmredi_x/y/rtransport
2734        added flag for excessive storing to avoid recomp. of
2735        u/v/rtans, dTdx/y/z
2736        -> this is not really necessary and very memory-consuming
2737      * adgmredi_slope_psi:
2738        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2739      * gmredi_slope_limit
2740        re-activated full calculation of taperfct for case 'ac02'
2741    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2742    
2743    checkpoint47i_post
2744    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2745    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2746      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2747    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2748    o gmredi: fix few bugs.
2749    
2750    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2751    This will be a good checkpoint to plug into the ecco-branch.
2752    o few modif.'s to get latest version adjointed
2753      (mainly kick out code in ini_linear_phisurf)
2754    o modif's to run adjoint with exactConserv
2755    o case GM_BOLUS_ADVEC should be cleaned
2756      S/R gmredi_slope_psi should be cleaned
2757    o verification/carbon now has exactConserv=.TRUE.
2758    
2759    checkpoint47g_post
2760    o time-average AIM output: becomes independent from statvars time-average
2761      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2762    o After TAF bug fix:
2763      Tested adjoint of gmredi package.
2764      Tests were done with checkpoint47 rather than with latest
2765      checkpoint47f_post since the latter is broken for the adjoint
2766      verification/carbon/ contains both ADM and TLM gradient checks.
2767    Here they are, before they get changed/lost/stolen.
2768    Mostly modif.'s to fix numerical sensitivities.
2769    Gradient checks OK for
2770    - GM_taper_scheme:
2771      * clipping
2772      * ac02
2773      * linear
2774      * glw91
2775      * dm95
2776      * ldd97
2777    - GMREDI_OPTIONS:
2778      * GM_VISBECK_VARIABLE_K
2779      * GM_NON_UNITY_DIAGONAL
2780      * GM_EXTRA_DIAGONAL
2781      * GM_BOLUS_ADVEC
2782    in conjunction with data.gmredi parameters to be checked in
2783    in a few minutes under verification/carbon/code/
2784    
2785    checkpoint47f_post
2786    Merging from release1_p10:
2787    o modifications for using pkg/exf with pkg/seaice
2788      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2789        and SEAICE_EXTERNAL_FLUXES
2790      - pkg/exf CPP options EXF_READ_EVAP and
2791        EXF_NO_BULK_COMPUTATIONS
2792      - usage examples are Experiments 8 and 9 in
2793        verification/lab_sea/README
2794      - verification/lab_sea default experiment now uses
2795        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2796    
2797    checkpoint47e_post
2798    o created a tag prior to creating a branch
2799    
2800    checkpoint47d_post
2801    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2802      at the bottom boundary had an erroneous half slip boundary condition
2803    o added bottom drag and no slip boundary condition capabilities to
2804      oceanic pressure coordinates code
2805    o added new verification experiment global_ocean_pressure, this experiment is
2806      also described in the tutorial section of the manual
2807    checkpoint47d_pre
2808    
2809    checkpoint47c_post
2810    o Added a verification experiment for a global cubed-sphere ocean run
2811      -  verification/global_ocean.cubed32x32x30
2812      -  uses pkg/therm_seaice and pkg/bulk_forcing
2813    
2814    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2815    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2816      when using P-coordinate; only implemented for atmospheric config.
2817    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2818      NOTES: requires option NONLIN_FRSURF to be "#define".
2819    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2820    
2821    checkpoint47b_post
2822    Merging from release1_p9:
2823    o pkg/seaice
2824      - removed GOTO's and added taf directives
2825      - double precision constants to reduce the g77 (Linux)
2826        to F77 (SGI) differences reported in release1_p8
2827    o tools/genmake
2828      - added SGI options
2829    o verification/testscript
2830      - updated to that of checkpoint47a_post
2831    o verification/global_ocean.90x40x15/input/eedata
2832      - modified for SGI f77 compatibility
2833    o verification/lab_sea
2834      - added description of sea-ice model
2835      - added missing matlab routines
2836      - added test of thermodynamics parallelization
2837    
2838    checkpoint47a_post
2839    o new pkg: aim_v23
2840     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2841       for now, keep the same surface forcing as before.
2842     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2843     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2844     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2845    o add diagnostic of surface correction term in monitor output
2846    
2847    o bulk_force and therm_seaice
2848    - Two packages:  bulk_force (Bulk forcing)
2849      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2850    - Earlier integration from Stephaine Dutkiewicz
2851      and Patrick Heimbach.
2852    - Two ifdef statements for compile time,
2853       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2854    
2855    checkpoint47
2856    differentiable version of checkpoint46n_post
2857    o bug fix in quasihydrostaticterms
2858    o * "clean" adjoint code (in terms of extensive recomputations)
2859        can now be obtained for all GMREDI options (i.e. for
2860        - GM_VISBECK_VARIABLE_K
2861        - GM_NON_UNITY_DIAGONAL
2862        - GM_EXTRA_DIAGONAL
2863        - GM_BOLUS_ADVEC )
2864      * However, wrong gradient check problem remains unsolved.
2865      * New CPP options have been introduced for different
2866        tapering schemes
2867    o external_fields_load now part of differentiation list
2868    o pressure needs multiple storing;
2869      would be nice to have store_pressure at beginning or
2870      end of forward_step, e.g. by having phiHyd global (5-dim.)
2871      (NB: pressure is needed for certain cases in find_rho,
2872      which is also invoked through convective_adjustment).
2873    o recomputations in find_rho for cases
2874     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2875    o #define ATMOSPHERIC_LOADING should be differentiable
2876    o ini_forcing shifted to begining of initialise_varia
2877    o Incorporating QNVS line search routines into MITgcm
2878      (this is separate code, and therefore not under pkg)
2879      lsopt/, optim/
2880    o Updated verification/carbon/
2881      - #define GM_VISBECK_VARIABLE_K
2882      - GM_taper_scheme    = 'ldd97'    
2883    
2884    checkpoint46n_post
2885    Merging from release1_p8:
2886    o verification/natl_box:
2887      updating new external_fields_load routine
2888    o New package: pkg/seaice
2889      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2890      The sea-ice code is based on Hibler (1979-1980).
2891      Two sea-ice dynamic solvers, ADI and LSR, are included.
2892      In addition to computing prognostic sea-ice variables and diagnosing
2893      the forcing/external data fields that drive the ocean model,
2894      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2895      The implied surface heat flux is then stored in variable
2896      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2897      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2898      non-local transport term.  Because this call precedes model
2899      thermodynamics, temperature under sea-ice may not be "exactly" at
2900      the freezing point by the time theta is dumped or time-averaged.
2901      N.B.: fairly large differences in accuracy occur across
2902            different platforms/compilers; comparison between
2903            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2904            generated output gives:
2905       T           S           U           V
2906      C D M    c        m  s        m  s        m  s        m  s
2907      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2908      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2909      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2910    
2911      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2912    o GAD:
2913      - generated new common blocks to account for call of
2914        same gad routines with differing traceridentities
2915        (needed to modify tracerIdentity indices in GAD.h)
2916      - generated separate common blocks for case useCubedSphereExchange
2917        (Department of Futurology)
2918      - parameter lists to gmredi_?transport: added tracerIdentity
2919      - added new key indices to tamc.h
2920    o external_fields_load:
2921      - added this routine to TAF list
2922      - needed to make some common blocks global and additional storing
2923        along the same lines as exf package (checkpoint_lev?_directives.h)
2924    o exf:
2925      updated external forcing package
2926      - bug fixes carried over from ecco-branch
2927        (missing OBCS_OPTIONS.h in two routines)
2928      - enable easy to use "no forcing".
2929      - added exf I/O for atmospheric loading
2930      - added exf I/O for runoff data
2931      - transfered scaling between exf <-> MITgcm to exf namelist
2932    o Adding new verification experiment global_with_exf.
2933      This verification experiment is almost identical to the
2934      global_ocean.90x40x15 experiment, except that it uses
2935      the exf (and cal) package instead of the
2936      external_fields_load routine (cf README file).
2937    
2938    checkpoint46m_post
2939    o modified testscript to return -- when there are no lines of "%MON" output
2940    o added new flag "quasiHydrostatic" for QH mode
2941      and new routine quasihydrostaticterms()
2942    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2943      New routine: mom_u_coriolis_nh()
2944    o fixed sign of non-hydrostatic metric terms in u and v equations.
2945      Depend on correct sign of gravitySign.
2946    o added work.pc* to .cvsignore in aim directories using ifc
2947    o introduced flag for controllin non-hydrostatic metric terms
2948    o removed gravitySign from PARM04
2949    o switched to g77/ifc from pgf77 in aim experiments
2950    
2951    checkpoint46l_post
2952    o made convective adjustment work with pressure coordinates:
2953     - changed the direction of k-loop in convective_adjustment.F for the
2954       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2955     - adjusted the reference pressure k-index in convective_adjustment.F
2956     - adjusted the convection condition in convect.F (in analogy to
2957       calc_ivdc.F)
2958     - convective_adjustment no longer computes anything on the halos
2959     - removed the warnings about negative salinity from find_rho.F and
2960       find_alpha.F; instead the new routine look_for_neg_salinity, called
2961       at the beginning of find_rho, find_alpha, and find_beta, does a
2962       check of the entire slice, if CPP-option
2963       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2964    checkpoint46l_pre
2965    
2966    checkpoint46k_post
2967    o fixed the verification/global_ocean.90x40x15 experiment:
2968     - new bathymetry (the world according to A., JMC, and M.)
2969     - new initial fields and forcing fields (*.bin files)
2970     - new POLY3.COEFFS (for the next release one should switch to a full
2971       equation of state: JMD95P or MDJWF)
2972     - fixed several errors and redundancies in the data file
2973     - experiment uses looped cells
2974     - added matlab directory with diagnostic scripts for plotting of output
2975    
2976    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2977     - read AIM physics parameters from a file (data.aimphys)
2978     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2979    
2980    checkpoint46j_post
2981    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2982    o move wVel computation at the end of the time step, in S/R integr_continuity
2983    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2984    o update timeave pkg for wVel diagnostic.
2985    checkpoint46j_pre
2986    
2987    checkpoint46i_post
2988    o Clean up AIM package (and keep the results unchanged):
2989      include CPP_OPTION and use IMPLICT NONE in all routines ;
2990      declare all the variables _RL ; use _d 0 for all numerical constants.
2991      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2992    
2993    checkpoint46h_post
2994    o cleaned up the use of rhoNil and rhoConst.
2995      - rhoNil should only appear in the LINEAR equation of state, everywhere
2996        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2997        and the dynamical equations are all divided by rhoConst
2998    o introduced new parameter rhoConstFresh, a reference density of fresh
2999      water, to remove the fresh water flux's dependence on rhoNil. The default
3000      value is 999.8 kg/m^3
3001    o cleanup up external_forcing.F and external_forcing_surf.F
3002      - can now be used by both OCEANIC and OCEANICP
3003    checkpoint46h_pre
3004    
3005     Added code to convert surface volume flux (fresh water) into
3006     a mass flux when using P coordinates in the ocean (OCEANICP).
3007     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3008    
3009    checkpoint46g_post
3010    o Include a new diagnostic variable phiHydLow for the ocean model
3011      - in z-coordinates, it is the bottom pressure anomaly
3012      - in p-coordinates, it is the sea surface elevation
3013      - in both cases, these variable have global drift, reflecting the mass
3014        drift in z-coordinates and the volume drift in p-coordinates
3015      - included time averaging for phiHydLow, be aware of the drift!
3016    o depth-dependent computation of Bo_surf for pressure coordinates
3017      in the ocean (buoyancyRelation='OCEANICP')
3018      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3019        Theta, Salinity, and Pressure in the parameter list. This routine is
3020        presently contained in find_rho.F. This routine does not give the
3021        correct density for 'POLY3', which would be a z-dependent reference
3022        density.
3023    o cleaned up find_rho
3024      - removed obsolete 'eqn' from the parameter list.
3025    o added two new verification experiments: gop and goz
3026      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
3027    checkpoint46g_pre
3028    
3029    checkpoint46f_post
3030    o Enable tangent linear (forward mode) gradient checks:
3031      - extended active file handling to g_... files
3032      - added TANGENT_SIMULATION to theSimulationMode
3033      - extended grdchk package accordingly
3034    o added tangent linear setup in verification/carbon/code_ftl
3035    o added adjoint setup in verification/front_relax/code_ad
3036    
3037    checkpoint46e_post
3038    o Added new equation of state -> MDJWF
3039      - EOS of McDougall et al., 2002, JAOT, submitted
3040      - caveat: the equation of state is only valid for a smaller (more
3041        realistic?) range of values than JMD95P/Z and UNESCO
3042      - added masks to the calculation of pressure in store_pressure
3043      - added more check values for density in check_eos (ini_eos.F), some of
3044        the old check values are out of the range of the MDJWF-eos, so don't
3045        expect perfect matches for those
3046    checkpoint46e_pre
3047    
3048    checkpoint46d_post
3049    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
3050      'OCEANICP', also initialised field pressure correctly in ini_eos in the
3051      case of pressure coordinates. eosType='JMD95Z' in
3052      combination with buoyancyRelation='OCEANICP' now causes an error.
3053    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3054      in find_alpha/beta.
3055    checkpoint46d_pre
3056    
3057    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3058      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
3059    
3060    checkpoint46c_post
3061    o Changes necessary for ocean in p-coordinates
3062     -  Added new buoyancy relation = 'OCEANICP'
3063     -  Added new parameters = gravitySign (this used to be contained inside
3064        the factor dRdZ which I added when we first switched to R coordinates).
3065     X GM/Redi is not compatible (yet)
3066     X bottom drag and no-slip need to be debugged.
3067    checkpoint46c_pre
3068    
3069    checkpoint46b_post
3070    o Added new equation of state -> JMD95Z and JMD95P
3071      - EOS of Jackett and McDougall, 1995, JAOT
3072      - moved all EOS parameters into EOS.h
3073      - new routines ini_eos.F, store_pressure.F
3074    o Added UNESCO EOS, but not recommended because it requires
3075      in-situ temperature (see JMD95)
3076    o Modified formatting for knudsen2.f in utils/knudsen2 and added
3077      unesco.f to be used with POLY3
3078    checkpoint46b_pre
3079    
3080    checkpoint46a_post
3081    o Added (atmospheric) pressure loading
3082      - new field in FFIELDS.h, etc...
3083      - new cpp flag ATMOSPHERIC_LOADING
3084    o Changed hFacC to _hFacC in calc_phi_hyd.F
3085    o Added SHORTWAVE_HEATING to some files for consistency
3086    checkpoint46a_pre
3087    
3088    checkpoint46
3089    further merges from release1_p5
3090    o new ctrl package
3091      - adopted from ECCO environment to enable optimization
3092      - added Eliassen Palm fluxes to controls
3093    o added Eliassen Palm flux controls to gradient check package
3094    o cost package
3095      - Compatible with new ctrl package
3096      - added Eliassen Palm cost hooks
3097      - modif's of existing cost functions
3098    o Adjoint-related bug fixes in kpp:
3099      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
3100      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
3101    o autodiff package
3102      - flow directives:
3103        + new for S/R do_the_model_io
3104        + enhanced for S/R checkpoint
3105        + new gmredi.flow
3106      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
3107        disable adcommon.h/g_common.h by default.
3108      - fixed problem for adjoint of global_max
3109    o modified verification/carbon/
3110    o New setup for adjoint of global_ocean
3111    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
3112    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
3113    o incorporated hooks for sponge layer code (external_forcing.F)
3114    
3115    checkpoint45d_post
3116    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
3117    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
3118      (affects plume_on_slope "cg2d" output)
3119    o add new parameter deltaTfreesurf for free-surface time stepping
3120    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
3121    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
3122    o change phiMin in exp1 (to agree with documentation)
3123    o add new flags:
3124     - T,S forcing inside/outside Adams-Bashforth
3125     - turn off temp,salt advection and/or forcing
3126     - for each tracer, define internal flag for multiDimAdvection & A-B
3127    o monitor: change definition of KE to check conservation of Energy
3128    
3129    checkpoint45c_post
3130    o Removed f90 comments ("!")
3131    o Modified initialisations to enable exf package for MITgcm
3132      (without invoking ECCO_PACKAGE).
3133    o modifications to gradient check package (Martin Losch)
3134      - enable centered differences
3135      - modified format of standard output
3136    
3137    checkpoint45b_post
3138    o cleaned exchange calls in cg2d
3139    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
3140    o included CPP option SINGLE_LAYER_MODE in thermodynamics
3141      to configure barotropic setup (Martin Losch)
3142    o moved some initialisations within bi,bj loop in dynamics
3143      (TAF flow dependency)
3144    o in initialise_varia, moved call packages_init_variables
3145      before convective_adjustment_init
3146      (corresponding adjustment of TAF tape initialisation).
3147    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
3148    
3149    checkpoint45a_post
3150    o compute Rho over the whole domain (extend iMin,jMin indices)
3151    o specific exchange for X-slice domain (case Ny=1)
3152    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
3153    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
3154    
3155    checkpoint44h_post = checkpoint45
3156    o Fix to restore differentiability:
3157      place at which packages_init_variables is called in
3158      initialise_varia is crucial for reverse control flow.
3159    o modifications in GMRedi to enable stable adjoint
3160      (corresponding modif's in thermodynamics, dynamics)
3161    o added missing hook for sponge layer code in external_forcing
3162    o modified test cost functions
3163    o storing in gad_advection (plus removal of write(0,*)!
3164    o missing headers TR1.h added in convective_adjustment routines
3165    o errorMessageUnit set non-equal zero in eeboot
3166      (conflict on some platforms, e.g. IBM SP3)
3167    o modified carbon verif.
3168    
3169    checkpoint44h_pre
3170    o vertical grid option: allow to put the Interface at the middle between
3171      2 cell-centers ; replace delZ in pkg/kpp by drF.
3172    o GM Advective form: Tracers are advected using the residual transport (=
3173      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3174    
3175  checkpoint44g_post  checkpoint44g_post
3176  o fix surface correction term in multiDimAdvection (affects plume_on_slope  o fix surface correction term in multiDimAdvection (affects plume_on_slope
3177    results) ; ifdef missing in thermodynamics.F    results) ; ifdef missing in thermodynamics.F

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