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revision 1.82 by mlosch, Mon Aug 19 14:21:30 2002 UTC revision 1.880 by jmc, Fri Sep 21 21:37:11 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 testreport:
8      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
9        monitor & update offline_exf_seaice exp. output.
10      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
11    o pkg/seaice:
12      - bug fix in the evp solver: boundary conditions were affected be
13        masking of zMax/zMin (changes results)
14      - minor bug fix in boundary conditions in seaice_calc_strainrates
15        (changes results for no_slip)
16      - seaice_lsr.F: make interpolation of eta dependent on boundaries
17      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
18      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
19        stress formulation and no-slip boundary conditions
20    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
21      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
22    o pkg/seaice: a first HSALT time stepping equation has been checked in
23    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
24      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
25      without requiring DO-IF statements
26    o pkg/thsice:
27      use continuous power-law function for partition of energy between lateral
28      melting/freezing and thinning/thickening ; old code using step function
29      still available with #undef THSICE_FRACEN_POWERLAW
30      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
31    o testreport: change AD testing : check against results/output_adm.txt
32      using same scripts as for forward test.
33    
34    checkpoint59g
35    o adjoint testing: in preparation for changing testreport:
36      - output format: cost and grad written on separated lines
37      - ad output results in directory "results" (instead of "results_ad")
38    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
39    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
40    o pkg/ecco: allow user defined cost function contributions
41    o testreport:
42      Allow to choose (per experiment) the list of tested output variables
43       and the main variable (used to issue a pass/FAIL ) ;
44      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
45      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
46      Also modify printing of summary:
47       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
48       b) echo the list of tested variables in the individual summary.txt of
49          each experiment.
50    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
51      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
52      (but still depend on the tile decompostion of the domain).
53    o pkg/seaice: change a discretization detail to make the B-grid code
54      "more symmetric". This change is likely to remove all "ridges/leads" that
55      where quasi-aligned with the grid in B-grid solutions. It may also be
56      the solution to the stress coupling issues with the B-grid.
57    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
58      remove .cvsignore from input dir. (since testreport no longer run here).
59    o pkg/thsice:
60     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
61     - fix reshaping of sea-ice just after advection:
62       melt all the ice only if ice-volume is too small.
63     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
64       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
65     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
66    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
67      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
68    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
69      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
70      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
71      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
72      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
73      -> update output.txt
74    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
75     this affects truncation error: -> update output.txt of exp:
76      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
77      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
78    
79    checkpoint59f
80    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
81    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
82      a bounded range (in forward mode)
83    o pkg/ecco, ctrl, autodiff and mom_common:
84     internal parameter controls, completements of implementations
85    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
86    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
87      (not seem any difference in testing results).
88    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
89       at face corners.
90    o pkg/generic_advdiff:
91     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
92      loop range indices for computing vertical advection tendency
93      and do the calculation in the interior only (no overlap) ;
94      for now, only implemented for SOM advection (to save CPU time).
95     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
96    o exch2 adjoint
97      First set of changes:
98      - add exch2 hand-written adjoint templates
99      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
100        This will require cleanup in pkg/autodiff/*.F
101        (changed routines currently kept separate in verif. code/)
102      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
103        that used to hide exch2 or cubed-sphere specific code
104        (commented via 'cph-exch2')
105    o pkg/seaice
106      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
107    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
108       output of global_ocean.cs32x15.thsice .
109    
110    checkpoint59e
111    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
112      for B-grid vector (not yet tested) and C-grid vector (<- only used
113      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
114    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
115      (#ifdef ALLOW_SALT_PLUME)
116    o gather_2d/scatter_2d: removed halo regions
117    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
118      scheme and the corresponding test case (under front_relax dir). For now,
119      only available with Skew-flux form and not yet tested in realistic set-up.
120      adjoint: store directives updated, but gradient checks deteriorated,
121      so maybe GM/Redi adjoint is now broken.
122    o seaice adjoint
123      * add AREA, HEFF, HSNOW as control variable
124        (should not change lab_sea results)
125      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
126    o pkg/seaice:
127      * added computation of saltFlux in seaice_growth;
128        For time being, sea ice salinity is assumed constant
129        contribution of snow flooding to freshening of sea ice is neglected.
130        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
131        defaults to 0.0 in order to maintain backward compatibility.
132        Typical values for SEAICE_salinity are 4 to 10 g/kg.
133      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
134      * added SEAICE_availHeatFrac, which specifies fraction of surface level
135        heat content used to melt or grow ice
136      * commented out cap of HICE: it helps keep ice thinner
137      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
138      * applied OBCS T/S mask to HEFFM sea ice mask
139    
140    checkpoint59d
141    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
142     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
143     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
144    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
145     and change default value of parameter "GM_Small_Number";
146     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
147       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
148       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
149    o pkg/ecco: cost function when applying pkg/smooth to controls
150    o pkg/ctrl: add forcingPrecond run time parameter
151    o pkg/seaice:
152     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
153     - fix bug in metric terms of u-equation in LSR solver (implicit part),
154       changes verification/lab_sea
155     - rearrange implicit part of u-equation in LSR solver to make it easier to
156       read, understand, and debug. This causes changes at the truncation level.
157     - fix (serious) bug in the boundary conditions (sign error in the implicit
158       part) of the LSR solver. Changes all LSR results.
159     - fixed problem with HSNOW initialization to avoid thick snow when AREA
160       is initilized with small values - does not change lab_sea results.
161     - added HsnowFile initialization capability
162    o pkg/smooth: addition to model/src and pkg/ctrl so allow
163     initialization of pkg/smooth and application to control vector
164    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
165    o dependencies: pkg/profiles requires pkg/cal
166    o pkg/profiles:
167     - added option ALLOW_PROFILES_GENERICGRID
168         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
169         that interpolation information (grid points and coefficients) is provided
170         within the netcdf input files.
171         -> sample matlab scripts can be found in MITgcm_contrib/gael
172         that allow you to prepare netcdf input files.
173     - also modified: cleaner include statements, cleaner error print statements,
174       cleaner stops when error, and more tests of the netcdf input files consistency.
175    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
176    o pkg/seaice:
177     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
178       requires a new routine: seaice_diagnostics_fill.F
179     - make sure that seaice does not move if not forced (pressure replacement
180       method, Hibler and Ip, 1995), changes results
181     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
182     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
183       It is turned off by default (=-1.), because it changes the results.
184     - make it possible to read AREA from a file, too.
185    
186    checkpoint59c
187    o add S/R and diagnostics for oceanic mixed-layer depth
188    o move GMRedi call after all vertical mixing schemes (including KPP)
189    o pkg/thsice:
190     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
191      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
192    o pkg/obcs:
193     - bug fix for balance code
194    o pkg/seaice:
195      - allow values of SEAICE_elasticParm > 1
196      - add new parameter SEAICE_evpTauRelax as an alternative
197        to SEAICE_elasticParm
198      - make lsr boundary conditions free slip (by default), changes result
199      - add code for no slip boundary conditions for lsr
200      - set minimum of zeta to zero (and not 4e8) (changes results)
201      - add a cap on AREA after advecting AREA if seaice_growth is not called
202    o change calculation of Visbeck K:
203      - no longer depend on tapering scheme; instead, compute slope (limited
204        by GM_maxSlope). this is equivalent to what was comuted before with
205        clipping or linear tappering.
206      - fix vertical averaging (wrong by 1/2 level)
207      - leave the old version (but will not be maintained) within
208        #ifdef OLD_VISBECK_CALC / #endif
209      - update output of exp. ideal_2D_oce
210    o change error catch in calc_r_star to improve vectorization
211    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
212      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
213    o adjoint:
214      Re-organized adjoint checkpointing according to Matt Mazloff
215      (but with modifs/completions/cleanups)
216      Storing is now bundled into large arrays to optimized I/O
217      (and second step in cleanup of the_main_loop)
218    
219    checkpoint59b
220    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
221      - export/import (between ocean & coupler) fields needed for ocean DIC.
222    o pkg/seaice:
223      - get rid of three more exchanges seaice_calc_viscosities (required
224        different loop boundaries in seaice_lsr and seaice_ocean_stress)
225      - bug fix in seaice_ocean_stress (update of lab_sea required)
226      - reduce loop boundaries to necessary minimum also in seaice_evp
227      - go back to the old way of computing deltaC/Z as the adjoint likes that
228        better
229    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
230      passive tracer to an Age Tracer) + update output.txt
231    o pkg/exf:
232      - implement A-grid / C-grid selection for wind-stress input files.
233      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
234      for now, in exf_bulk_largeyeager04.F only :
235      - change implementation for case where windspeed + 2. components wind-stress
236        are read-in. AND use rhoConstFresh to convert evap.
237    o pkg/seaice:
238      - use correct EXCH_UV for wind-forcing (on A-grid).
239      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
240        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
241    o pkg/exf:
242      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
243      EXF_INTERPOLATION:
244      - merge global_with_exf/code version of exf_interp_read.F
245        to the main code ;
246      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
247        reading the file ; Important: This options needs to be defined to recover
248        previous code.
249        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
250      - no longer loose real*8 precision along the way when using exf_iprec=64.
251    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
252      - change discretisation of evp-solver in order to avoid another exchange
253        (changes lab_sea) and clean up a little
254      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
255        help the adjoint (this also changes the results slightly)
256      - add a few "_d 0" where they had been missing in seaice_evp.F
257      - cleaning up: remove unused seaice_calc_rhs.F
258    o pkg/exf: some cleaning-up:
259      - change various "constants" into runtime parameters
260      - cleaned-up Large&Yeager04 routine which should eventually
261        replace exf_bulkformulae.F (changed names of S/R and CPP)
262        and merged various ALLOW_ATM_WIND options
263     only used with thsice pkg (in thsice_get_exf.F):
264      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
265        which are used when useStabilityFct_overIce=TRUE (= the default)
266      - change default values of ice & snow emissivity and scale downward LW
267        by ice & snow emissivity.
268    o pkg/thsice:
269     fix few little problems, in thsice_calc_thickn.F:
270      - growth vertically (and not laterally) if iceFrac == iceMaskMax
271      - melt only laterally if hIce < hThinIce (as the comments say)
272      and in thsice_extend.F:
273      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
274      - start to form ice as soon as the minimum ice-volume is reachable.
275     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
276      and cpl_aim+ocn
277    o pkg/kpp
278     - move computation of surface related input fields to KPP into a new
279       subroutine kpp_forcing_surf.F
280     - remove wrong (within bi,bj loops) EXCH calls.
281     - little cleaning (add argument myThid in last position, cvs header ...)
282     - for now, fix conservation problem by exchanging KPPviscAz (may not
283       be the best fix)
284    o pkg/seaice
285     - check for inconsistent evp parameter/cpp-flag combination
286     - remove leftover errIO flat for obsolete name list error handling
287    o OpenAD
288     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
289    
290    checkpoint59a
291    o pkg/seaice: some parameter clarifications and a little bit of clean up
292    o pkg/thsice: rename run-time parameters:
293       himin       -> hIceMin
294       himin0      -> hThinIce
295       hihig       -> hThickIce
296       i0          -> i0swFrac
297       transCoef   -> bMeltCoef
298       frac_energy -> fracMelting
299      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
300       with default values (for now) that do not change the results.
301      remove old version of thsice vars advection in pkg/seaice.
302    o in FFIELDS.h:
303      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
304      - make pLoad & sIceLoad always available (but still only used if
305         ATMOSPHERIC_LOADING is #define).
306    o pkg/kpp: replaced _KPP_RL with _RL
307    o bug fixes for vertical diffusivity computations when both KPP and
308        3D diffusivity arrays are used.
309    o pkg/seaice: fix bug in evp solver, while doing that
310      - change (improve?) discretization of stress computations for both
311        cgrid-lsr and evp solver
312      - add a new routine to compute strain rates
313      - the above changes lab_sea results
314      - add no slip conditions for evp solver (off by default), lsr-version
315        may follow
316      - fix exchange for shear at Z-points (does not change lab_sea)
317      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
318        (to force the user to pick a time step since there is not "safe" way
319        of choosing it)
320      - add principal stress diagnostics
321      - rearrange fields for evp a little to avoid having to call a: too many
322        exchanges and b: exchanges for stress trensor components which we do
323        not have.
324      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
325        of evp, complete rewrite for lsr case (latter is does not yet work
326        in all cases)
327    o pkg/kpp: add code to have mixing in shelf ice caverns
328      - add myThid to all kpp routines (long overdue)
329    
330    checkpoint59
331    o pkg/exf:
332      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
333        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
334      - move exf header files from lower_case.h to UPPER_CASE.h ;
335        add missing cvs Header & Name
336      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
337      - add namelist param. selectStressGridPosition, exf_monFreq
338      - retire many _CLIM routines, and remove data.exf_clim
339        + params moved to data.exf
340        + climsst, climsss now handled by exf_set_gen, i.e.
341          climss?period=0 refers to constant field,
342          climss?period=-12 to monthly forcing
343      - split up namelists in data.exf
344    o pkg/seaice:
345      - remove seaice_exch and seaice_exch_uv
346      - remove superfluous exchange of theta
347      - add myThid to seaice_budget_ocean/ice
348      - add new interface for atmospheric wind forcing (C-grid only)
349        + new routine
350        + two new field (taux, tauy for stress over ice)
351        + removed one global field (DAIRN) for C-grid case only
352    o pkg/thsise
353      - 2nd set of modifs for thsice adjoint in conjunction with exf
354    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
355    
356    checkpoint58y_post
357    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
358      vertical diffusivity, similar to that in MOM4; turned on using
359      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
360      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
361    o Added capability for 3D specification of background vertical diffusion
362      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
363      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
364      "data" file that contains the 3D vertical diffusivity coefficients.
365    o ice dynamics (pkg/seaice) with thsice thermodynamics:
366      - add code within pkg thsice to advect & diffuse sea-ice fields
367      similar to (and will replace) what has been added in  seaice_advdiff.F,
368      but: - conserving Mass, Heat & Salt.
369           - better when using non-linear advection scheme (not yet fully tested)
370           - can also be used in atmospheric set-up (for now, only the diffusion).
371    
372    checkpoint58x_post
373    o IO option for global-file compact format:
374      - add options when generating topology (utils/exch2/matlab-topology-generator)
375      - add I/O capability (pkg/mdsio).
376      - adapt utils/matlab/rdmds.m to read this format.
377      for now long-line format not yet supported by pkg/mdsio (& exch2).
378    o shelfice: add a few diagnostics
379    
380    checkpoint58w_post
381    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
382      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
383      (and replace horiVertRatio in NH code).
384      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
385                         and tutorial_plume_on_slope (sensitive to truncation)
386    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
387      directly to drive seaice model (C-grid only)
388    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
389     - reintroduce computation of wind from stress,
390     - compute tau (in exf_bulkformulae.F) from windstress averaged to
391       mass points to avoid tau = 0
392     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
393    o rdmnc.m: make it work with "global" files created with gluemnc
394    o rdmnc.m : some improvements in dealing with singleton dimension
395      (tested on all testreport mnc output files).
396    o genmake2: disable pkg/profiles if netcdf test fails.
397    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
398    o move call to cal_readparms up to make calendar parameters/variable available
399      to all packages
400    
401    checkpoint58v_post
402    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
403      useDynP_inEos_Zc tested.
404    o pkg/exf: changes to properly interpolate/mask/scale initial fields
405    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
406      and portions thereof.  See read_cs.txt for description and examples.
407    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
408      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
409      following the great-circle arc between those 2 points.
410    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
411      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
412    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
413     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
414     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
415     - still needs work (not working with some options ; efficiency to improve)
416       and serious testing.
417     - use this scheme for temperature & salinity in 2 advection test exp.:
418       advect_xy & advect_xz, respectively.
419    
420    checkpoint58u_post
421    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
422    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
423    o testreport: add option "-skipdir" to skip some test.
424    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
425      momentum calculation.
426    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
427    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
428      remove checkpoint.F and the_correction_step.F (no longer used);
429      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
430    o add option (linFSConserveTr) to correct for tracer source/sink due to
431      Linear Free surface
432    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
433    o pkg/thsice: fix reading mnc-pickups
434    
435    checkpoint58t_post
436    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
437    o pkg/mdsio:
438     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
439       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
440       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
441     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
442     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
443       either MDS_READ_FIELD or MDS_WRITE_FIELD )
444     - new S/R (to replace MDSWRITEMETA), which allows to write more
445       informations (variable names, time ...) to meta files.
446     - modify rdmds.m to give back the meta file content.
447    o pkg/diagnostics: change vertical interpolation to be safer, and more
448       flexible (define p-levels to interpolate to in data.diagnostics);
449      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
450       diagnostic pointer.
451    o pkg/seaice: more cleaning up of seaice_growth, added many comments
452    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
453    o fix multi-category seaice:
454     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
455       SEAICE_MULTICATEGORY
456     - fix short wave heat flux
457    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
458       and allow to use EVP solver. Change forward lab_sea: test both EVP
459       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
460    o Initial check-in of lab_sea adjoint
461      (very similar to natl_box_adjoint/code_seaice)
462      * used C-grid and EVP solver
463      * used KPP, GM/Redi
464      * uses inAdExact=.TRUE.
465      * gradient checks fail for both ADM and TLM
466        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
467        f.d. gradients actually seem more problematic than ADM, TLM gradients;
468        issue is related to forward mismatch between g77 an ifort
469    o pkg/seaice: overhaul of thermodynamics
470     - growth.F and groatb.F are replaced by new routine seaice_growth.F
471     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
472     - move a few global fields out of SEAICE.h into seaice_growth.F and
473       make them 2D (FICE/QNETO/ ...)
474     - remove FO (it is the same as QNETO)
475     - introduce a few local fields to avoid modifying external fields such
476       as atemp, etc.
477    
478    checkpoint58s_post
479    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
480      changed exf_set_gen.F so that
481        genperiod=0 means input file is one time-constant field and
482        genperiod=-12 means input file contains 12 monthly means
483    o CG2D: use pre-computed solver main-diagonal (stored in common block);
484      this affects truncation error ; generate new output file for exp. which
485      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
486        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
487        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
488        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
489        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
490        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
491    o start implementation of deep-atmosphere and anelastic formulation
492    o verification: remove 2nd copy of input files and use script "prepare_run"
493      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
494    o mom_common/vecinv/fluxform: fix a few initialisation isssues
495    o profiles: fix for multithreaded case
496    
497    o diagnostics: rename few diags:
498      s/'PRESSURE'/'RCENTER '/g
499      s/'TICE    '/'oceFreez'/g
500      s/'TAUX    '/'oceTAUX '/g
501      s/'TAUY    '/'oceTAUY '/g
502      s/'SWFLUX  '/'oceQsw  '/g
503      s/DIFx/DFxE/g
504      s/DIFy/DFyE/g
505      and add few ocean-forcing diagnostics:
506      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
507    o modifications to pkg/seaice/growth.F and budget.F, which change results of
508      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
509      as actual snow thickness.  It now refers everywhere to effective snow
510      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
511    
512    checkpoint58r_post
513    o modifications to pkg/seaice/growth.F, which change results of
514      lab_sea experiment: fixes pertain to melting snow over open water, to
515      masking EVAP under sea ice, and to using the correct AREA variable for
516      computations of EVAP, PRECIP, HSNOW, and GHEFF
517    o add ability to read bathy, salt, and theta using MNC (off by def)
518    o add flooding algorithm and advection of HSNOW for pkg/seaice;
519      both are turned off by default and do no change any results
520    o seaice advection with pkg/thsice: a step toward the use of non-linear
521      advection scheme, but #ifdef or commented out for now (requires more EXCH).
522    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
523      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
524      in natl_box (affects results @ truncation level: update output.txt)
525    o multi-threading and IO:
526      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
527      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
528        (needed to work with SingleCpuIO): tested in all verif. exp.
529    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
530      affects the results (but none of the verification test uses this scheme).
531    o Adding some pkg/diagnostics capability to pkg/seaice
532      (will certainly be subject to changes)
533    o ctrl: adding new control variables:
534      lwflux, lwdown, evap, snowprecip, apressure, runoff
535    
536    checkpoint58q_post
537    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
538      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
539      high_res_cube configuration by 4% on Columbia.
540    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
541      add (in global_with_exf/code) a version of EXF_INTERP_READ without
542      dynamical allocation (seems to work in multi-threaded).
543    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
544      single CPU io) so that TAF does not have to see EESUPPORT.h
545    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
546    
547    checkpoint58p_post
548    o obcs: stop if obcs is used with useCDscheme = .true.
549    o shelfice:
550     - fix a sign error so that no slip at shelfice interface works
551     - remove stop for combination non-hydrostatic code and shelfice. That does
552       not mean, that the results are correct, but at least they are numerically
553       stable
554    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
555    o added adjoint exch routined for all exch*3d* routines
556      and updated flow directives
557    
558    checkpoint58o_post
559    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
560      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
561    o change controling S/R for writing pickup file (new S/R do_write_pickup)
562      and clean-up reading/writing of pickup files.
563    o fix local version of read/write pickup (NH part) in rotating_tank/code
564    o simplify EXCH interface:
565     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
566     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
567    o added the regrid package
568    o shelfice:
569     - add a simple boundary layer scheme to reduce noise
570     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
571    
572    checkpoint58n_post
573    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
574       local variable (not in common block).
575    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
576      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
577      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
578        to work with SingleCpuIO.
579    o add "_d 0" to real constant of pkg/cfc subroutines ;
580       update exp. cfc_exemple & tutorial_cfc_offline output files.
581    o multi-threading and IO:
582      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
583        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
584      - barrier before and after reading.
585      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
586      - avoid using MDS_WRITELOCAL for LAND pkg output.
587      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
588        common-block variables ; Allows multi-threading with master-thread IO.
589    o change default MAX_NO_THREADS from 32 to 4 ;
590      and stop cleanly when MAX_NO_THREADS is too small.
591    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
592    
593    checkpoint58m_post
594    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
595       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
596    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
597       keep global_ocean.90x40x15 (for AD testing) with former secondary test
598       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
599    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
600        add MITgcm_tutorials (= code + all the tutorials)
601    o ecco, option to compute cost for total ssh (mean+anom)
602    o consistent with addition of ptracer and ssh in pkg/profiles
603    o profiles: adding ptracer and ssh
604    o testreport: change multi-test output-file name
605      (from output.txt.{name} to output.{name}.txt)
606    o profiles: now ok for mutli-tiles case
607    o seaice: add 4 parameters for different advection schemes for area,
608      (effective) seaice thickness, enthalphy, and snow height. Their default
609      is the standard parameter SEAICEadvScheme
610    o calc_gw:
611     - add cosFacU in zonal viscous flux (harmonic.visc.).
612     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
613       of tutorial_plume_on_slope.
614    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
615    o calc_gw: true flux-form, account for horizontal grid spacing.
616      update rotating_tank results, but not plume_on_slope (affected at
617      truncation level, 11 digits).
618    
619    checkpoint58l_post
620    o calc_gw:
621     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
622     - remove side-drag for now (need to fix it); update plume_on_slope results.
623     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
624    o commit code to make SST/SSS weights spatially variable
625      (based on either variable in-situ or variable initial T/S weights)
626    o pkg/ecco:
627      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
628        now based on horizontally varying weights wthetaLev, wsaltLev
629      * cost_averagesflags now returns year indices in addition to day, month
630      * sflux balance is performed on annual basis
631        (sflxumm, sfluxmm2, bal_sfluxmm)
632      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
633        including separate counting and multipliers
634    o pkg/rbcs
635      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
636    
637    checkpoint58k_post
638    o testreport:
639     - always build in dir. "build" (if not there, mkdir build instead of building
640       & running in input)
641     - run in dir run (if it exists), in build otherwise.
642     - call prepare_run (if input/prepare_run exists)
643     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
644    o pkg/exf modifications to interpolation and rotation routines for more
645       reasonable treatment of North Pole singularity: for tracers North Pole
646       value is set to northernmost zonal-mean value, for zonal velocity it is
647       set to zero, and for meridional velocity it is set to northernmost value.
648    o pkg/exf/exf_check_range.F
649     - add tile index to diagnostics and move stop statement to the very
650       end of the routine.
651    o pkg/diagnostics: (diagnostics_main_init.F)
652      define title of isomorphic variables according to the current config.
653    o pkg/thsice with pkg/seaice dynamics:
654    - fix domain of computation (interior only, required for exf) and do exchanges
655    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
656    o towards a standard way of dealing with multi-threading in MONITOR
657      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
658    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
659       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
660    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
661    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
662    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
663       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
664    o tracer advection:
665     - clean-up and simplify calc_common_factors.F
666     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
667       advection subroutine (but still not used within DST advection S/R)
668    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
669    
670    checkpoint58j_post
671    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
672      from file (collects calls previously in FORWARD_STEP)
673    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
674    o adjoint store dir. adjusted accordingly
675    o genmake2
676      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
677    
678    checkpoint58i_post
679    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
680      on wind stress (SEAICEstressFactor defaults to 1.)
681    o Total number of Timers is finite (<=40): comment out 2 non-essential one
682      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
683    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
684      on CS-grid: no longer loosing mass.
685    o exf & curvilinear-grid: no longer modify longitude xC & xG.
686    o pkg/ggl90: fix sloppy output and fix a bug
687    o pkg/seaice: added SEAICEuseEVPpickup parameter
688      - Set to false in order to start EVP solver with
689        non-EVP pickup files when using SEAICEuseEVP
690      - fix sign error in diffusion in seaice_calc_rhs
691    
692    checkpoint58h_post
693    * Modifications for bottom topography control
694      o replace hFacC by _hFacC at various places
695      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
696      o add non-self-adjoint cg2d_nsa
697      o update autodiff support routines
698      o re-initialise hfac after ctrl_depth_ini
699      o works for 5x5 box, doesnt work for global_ocean.90x40x15
700    * Adding verification for 5x5 box (4-layer) bottom topography control
701    
702    checkpoint58g_post
703    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
704       used for mean seasonal cycle, mean diurnal cycle); add an example
705       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
706    o pkg/ggl90:
707      - add parameter (minimum surface kinetic energy)
708      - fix bug (avoiding division by zero)
709    o couple pkg/thsice to pkg/seaice:
710      - modify advection in seaice to accomodate new scalar fields to be advected
711      - only muliDimAdection scheme work with seaice/thsice
712      - mapping of thsice-variables to seaice-variables, back and forth
713      - does not break the verification experiments, but does not give the
714        desired results either
715    o pkg/seaice
716      - make (default) second order advection a bit less confusing?
717    
718    checkpoint58f_post
719    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
720      to pkg/seaice):
721      - new routines thsice_map_exf and thsice_get_exf provide the interface
722      - add an additional formal parameter to thsice_solve4temp
723    o pkg/exf:
724      - add new fields wspeed, snowprecip (to be able to couple to thsice)
725      - correct Stefan-Boltzmann constant
726      - new parameter for longwave surface emittance
727      - separate some stuff from exf_bulkformulae into new routines  
728        exf_radiation, exf_wind
729      - add new parameters and constants: longwave emissivity for ocean, ice
730        and snow, evaporation parameters over ice
731      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
732        either wind from stress or stress from wind
733    o pkg/thSIce:
734    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
735    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
736       and THSICE_CALC_THICKN
737    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
738    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
739      to make debugging easier.
740    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
741    o pkg/bulk_force:
742      - clean-up comments and parameters ;
743      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
744    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
745      generate new output for test-experiment: aim.5l_cs.thSI
746    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
747      testreport accordingly
748    
749    checkpoint58e_post
750    o SEAICE_CGRID adjoint done
751    o R_STAR adjoint implemented.
752      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
753      * need to sort out init. of h0facc, etc.
754    o Make pkg/profile fully independent of ecco,cost, etc. stuff
755      to be able to use it in pure forward.
756    
757    checkpoint58d_post
758    o upgrade simple test-experiment to tutorial example:
759     step.1: duplicate the experiment and (step.2) will remove the old copy.
760      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
761      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
762      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
763      tutorial_global_oce_biogeo    <- copy of dic_example
764      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
765      tutorial_plume_on_slope       <- copy of plume_on_slope
766      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
767      tutorial_global_oce_optim     <- empty for now (David ?)
768      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
769     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
770    o correct a sign problem in cost_scat.F
771    o obcs and ptracers: fix boundary conditions for advections schemes
772      with larger stencil
773    o thsice adjoint: start
774    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
775      completeness
776    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
777      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
778    o ptracers adjoint:
779      * avoid extensive recomputatations
780      * fix missing re-init. of gptr (missed by TAF)
781    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
782      me to turn off the excessive output to STDOUT that this package produces
783    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
784      and add those terms in Vector-Invariant formulation.
785    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
786      if the control period (xx_hfluxperiod etc) is 0
787    o in profiles pkg, clean routines and fix details
788    o in ecco pkg, reading ssh data:
789      fix problem in case the model does not start at iter0=0
790    o fix mnc-pickup/restart for ptracers
791    o new package prifiles:
792      code to compute profile-based cost by Gael Forget
793      (modifs in ecco, ctrl, autodiff)
794    o Benign bug fix in initialization (spotted by M. Mazloff) of
795      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
796    
797    checkpoint58c_post
798    o adjoint: finish NLFS adjoint and provide reference output in
799      verification/global_ocean.90x40x15/results_ad_nlfs
800    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
801      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
802      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
803      with SEAICE_CGRID defined.
804    o move calendarDumps from "data" to "data.cal" and clean-up the code
805      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
806    o add useEXF & useCAL flags (for now, set in hard-coded way)
807    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
808      (were missing in NH mode, and wrong in quasihydrostatic mode).
809      waiting for Chris updated version of calc_gw to add those CALLs.
810    o fix bug in quasihydrostatic S/R ;
811      add a test for this option: global_ocean.90x40x15.qshyd
812    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
813      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
814    o add on/off flag useOffLine for package OFFLINE
815    o seaice:
816      - modify advection so that it works also on the C-grid
817      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
818        problem in multi-tile runs with C-grid
819      - add flags for clipping ice velocities and/or masking solver forcing
820      - fix drag (ocean on ice) formulation and a bug that caused noise in the
821        C-grid solver
822      - added a few comments to seaice_diffusion.F
823      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
824        are now exclusive)
825      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
826        required re-ordering the code a little:
827       + make DAIRN global variable (defined in SEAICE)
828       + move computation of the viscosities eta and zeta into a new separate
829         routine (because I need to recompute them in seaice_ocean_stress.F)
830    
831    checkpoint58b_post
832    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
833      update output.txt of exp. aim.5l_cs.thSI
834    o various mnc cleanups and improvements:
835      + shrink lookup tables by factor of ~4
836      + better error reporting when running out of lookup space
837      + able to handle longer path/file names (up to 500 chars)
838    o adjoint:
839      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
840      - TBD: "hidden" mom_vecinv recomp. in dynamics
841    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
842     (allow to differentiate between forcing components using new integer flags:
843      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
844     and add new flag to put Dissipation tendency out of Adams-Bashforth.
845    o ecco
846      - enable trend removal from SSH anomaly obs.
847    o adjoint
848      - a fix for PmEpR when #undef EXACT_CONSERV
849      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
850      - try to fix "hidden" recomp. in forward_step for NLFS
851        (NLFS seems broken sometimes after I checked it in)
852    o seaice:
853     - add c-grid version of the dynamic solver:
854       + three new routines that are the c-grid substitute lsr, dynsolver
855         and ostres
856       + put a few fields that were local to dynsolver into global common
857         blocks, so that I can move the computation of stresses etc into
858         seaice_lsr (saves coding but may break the adjoint).
859     - replace more hardwired parameters by runtime parameters
860     - add ice masks that mask the rhs of the implicit solvers where there
861       is no ice (commented out in seaice_dynsolver, because i am not sure
862       if this works properly), eventually this should replace the clipping
863       of ice velocities in seaice_dynsolver to +/-40cm/s.
864    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
865      include it only where its needed
866    o move balancing of fluxes before the call of external_forcing_surf
867    o seaice:
868      - correct units of turning angles (now they are really in degrees)
869      - move computation of GWATX/Y out of main routine into dynsolver
870      - initialize GWATX/Y in seaice_init
871    o Apply mask on Fresh-Water flux (needed for SSH forcing).
872      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
873    o seaice: add runtime flags for turning angles (default to zero)
874    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
875      and trend from exf forcing and ctrl control adjustments
876    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
877      (since checkpoint57x_post)
878    o change the default rotation period to 86164.s = the Earth rotation
879    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
880      and based on a reference stratification. Tested within hs94.cs-32x32x5.
881    o seaice advection: add code for choosing between the default (2nd order
882      central differences) and multiDim advection schemes provided by
883      pkg/generic_advdiff
884    o seaice:
885      - removed all references to SEAICE_GRID.h fields from
886        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
887        (cubed-sphere configuration will change a little)
888      - grid computations in seaice_init are obsolete now.
889      - cleaned up code a little so that is easier to read (hopefully).
890      - added new (better?) discretizations of default advection and diffusion
891        (turn on with SEAICEuseFluxForm)
892      - replace 1 in 3d global fields by kSurface in growth.F
893      
894    checkpoint58a_post
895    o seaice:
896      - bug fix in advect.F
897    o shelfice:
898      - separate shelfice load anomaly from pload (breaks with time
899        dependent forcing), => introduce constant field shelficeLoadAnomaly.
900        Its default is 0., but it may be computed more cleverly from (unknown)
901        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
902        done offline. A good approximation of the pressure load anomaly is
903        necessary to avoid large initial adjustment processes underneath
904        deep-reaching shelfice.
905      - small fix in ISOMIP shelfice_thermodynamics
906      - add more sophisticated thermodynamics of Hellmer (1989), this is
907        now the default
908      - give a few constants more intuitive names
909    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
910      if bulk formulae are used in long integration (especially EmPmR). Turn
911      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
912      if balancePrintMean, the imbalance that is substracted is printed to
913      STDOUT.
914    o fix bug (typo) in obcs_apply_eta.F
915    o add a new package shelfice which enables us to model the circulation
916      underneath shelf-ice with draughts of hundreds of meters.
917     - works
918     - to do: + include improved thermodynamics
919              + check whether kSurfC (from model/inc/SURFACE.h) can be used
920                instead of new field kTopC
921              + can we use topoFile, Ro_surf and existing code in ini_depth.F
922                instead of new field R_shelfIce and new code in ini_depth.F
923                and ini_mask_etc.F?
924              + adjust vertical mixing schemes?
925    o seaice pkg:
926     - add a cpp-flag to include a simple formula for a salinity dependent
927       freezing point of sea water at the surface
928     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
929       meridional stresses are now different (and hopefully correct)
930    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
931       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
932       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
933    o pkg/diagnostics: add options and parameters for regional-statistics
934       diagnostics ; define regions by reading a region-mask from a file
935       (might add other options later)
936    o pkg/bulk_force:
937     - add option and parameters to use AIM surface-flux formulae.
938     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
939       others forcing fields (defined in PARM05, parameter file "data") are loaded
940       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
941     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
942     - use the right EXCH call for uwind,vwind (to work on CS-grid).
943     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
944       and parameters (note: calcWindStress replaces .NOT.readwindstress).
945     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
946    
947    checkpoint58
948    o add "--embed-source" option to genmake2 which, when the supporting
949      tools can be compiled (as determined by genmake2) will turn on the
950      embed_files package which then embeds the entire MITgcm source code
951      (*.[fFhc] + Makefile) used for the build within the executable
952      - requested by CNH but off by default
953      - adds a paltry <9MB to the mitgcmuv executable in most cases
954      - only writes the output when useEMBEDSRC in eedata is true
955    o clean up 3-dim. relaxation codes:
956      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
957      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
958      * Thanks to Tom Haine for testing!
959    
960    checkpoint57z_post
961    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
962      affects output (@ truncation level) of exp. plume_on_slope ; updated.
963    o fix the pickup behavior for obcs in combination with ptracers
964    o fix a bug in ptracers_external_fields_load
965    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
966      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
967    o transfered surface NH pressure to eta field (if exactConserv).
968    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
969         and update lab_sea output.txt file.
970    o completing 3-dim. relaxation code: additional term
971         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
972      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
973      * At compile time, in "EXF_OPTIONS.h" set
974          #define  ALLOW_CLIMTEMP_RELAXATION
975          #define  ALLOW_CLIMSALT_RELAXATION
976      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
977          tauThetaClimRelax3Dim = 15552000.0,
978          tauSaltClimRelax3Dim  = 15552000.0,
979      * 3 cases:
980          1) Use a constant-in-time 3-dim. field
981          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
982          3) Real-time relax. to time-evolving prescribed field
983    o Adding Laplacian-type smoothness constraint on
984      initial and boundary (forcing) controls (ic, bc)
985      * enable at compile-time via
986        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
987      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
988      * Absolute scale somewhat unclear so far
989      * no area weighting was included since no other cost term does so far
990    
991    checkpoint57y_post
992    First step for a NLFS adjoint
993    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
994    o new init. routines for calc_r_star, calc_surf_dr
995    o still need to deal with ini_masks_etc
996    o testreport seemed happy
997    checkpoint57y_pre
998    
999    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1000    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1001    o add new offset feature to offline pkg (plus minor cleanup)
1002    o cfc fixes for final year of integration
1003    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1004      be in GCHEM_OPTIONS).
1005    
1006    checkpoint57x_post
1007    o fix testreport Pb in multiple test experiment.
1008    o cleanup our namelist syntax in verification:
1009      - make it more F95 standards compliant (some work still needed)
1010      - allows the vast majority of our tests to work with gfortran
1011    o Non-Hydrostatic:
1012     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1013     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1014    o Allow to apply AB on T,S rather than on AB(gT,gS):
1015     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1016     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1017       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1018     - need a "clever" read_pickup to restart from the other AB formulation
1019    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1020    o remove some unused variables (reduces number of compiler warnings)
1021    o adjoint
1022      * Disable useVariableViscosity for adjoint for time being
1023        (there are a number of extensive recomputations)
1024      * Initialize certain variables needed for adjoint
1025    
1026    checkpoint57w_post
1027    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1028                 fix the singleCpuIO RS version of MDSWRITEFIELD
1029       and add a WARNING if using globalFiles=T with multi-processors.
1030    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1031      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1032    o tracer advection scheme:
1033      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1034       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1035       was not very convenient).
1036      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1037       (further tests needed for the implicit DST & Flux-Limiter schemes).
1038    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1039      and sRef for convenience, handy, when you want to initialize
1040      ptracers in a large domain with a constant non-zero value. Also,
1041      untangle ptracers_init.F a little.
1042    
1043    checkpoint57v_post
1044    o change dome exp. to use variable viscosity in side-drag terms.
1045    o remove all the files from the cfc_offline test since they are now
1046      incorporated into tutorial_cfc_offline which has been producing
1047      identical results for a few days of testing
1048    o add new parameter: sideDragFactor to enable half-slip-side BC
1049      and change side-drag S/R to use viscosity from mom_calc_visc
1050      (can switch back by setting sideDragFactor=0.); affects results at
1051      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1052       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1053    o vorticity & strain are now computed without masking, to account for
1054      no-slip-side BC in variable viscosity calculation ; mask is applied
1055      anyway later on, before computing advection/coriolis terms.
1056    o modify exp4 to test new obcs support for reading from external files
1057      and for passive tracers
1058    o fix behavior of ptracers_monitor when monitor output is written to a
1059      netcdf-file; still not independent of monitor.F (writes in the same
1060      file).
1061    o change default value of tRef (put a uniform, meaningful value for ocean
1062      & atmos) and initialize sRef (was missing, as Martin mentioned).
1063    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1064      to be proportional to enstrophy dissipation length.  Thus,
1065       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1066      This is now consistent with Smagorinsky and with the manual.
1067    
1068    checkpoint57u_post
1069    o OBCS and PTRACERS: add open boundary support for passive tracers
1070      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1071        OB-values from file; this is not different from the way theta and salinity
1072        are treated
1073      - however, Orlanski-radiation conditions are not supported, and the model
1074        will stop if you use pTracers and Orlanski at the same time.
1075      - beefed up the rountine obcs_external_fields_load: now only those open
1076        boundary values are overwritten with values from files for which there
1077        are really files, otherwise the OB-fields remain untouched. This makes
1078        it possible to use different OBs at different ends of the domain (as
1079        with EXF)
1080    o reduce number of exch calls in shap_filt (s2).
1081    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1082      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1083    
1084    checkpoint57t_post
1085    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1086    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1087      same truncation, independent of the face number: affects affects several
1088      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1089    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1090      note that biharmonic viscosity + no-slip was not tested in any experiment.
1091    o fix bug in non-linear free-surf side-drag ; generate new output for
1092      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1093    o make mnc honor the writeBinaryPrec flag for most kinds of output
1094    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1095    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1096      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1097    o add brackets in multi-terms sum to get same truncation, independent of
1098      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1099      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1100    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1101      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1102      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1103      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1104      Suggested values of viscosity parameters found in mom_calc_visc.
1105      Many new viscosity diagnostics available.
1106    
1107    checkpoint57s_post
1108    o Add clearing-house for viscosity calculations, mom_calc_visc and
1109      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1110      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1111      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1112      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1113      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1114      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1115      ViscAhStrain and viscAhTension are now retired.
1116    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1117    o In response to JMC's bug report, genmake2 now ignores any soft-links
1118      that it finds in the *current* directory when searching for files.
1119      Soft-links found in any other source directories will still work as
1120      they did before.
1121    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1122      a C routine to unlimit the stack size
1123    o mnc-ify pkg/aim snapshot vars
1124    o mnc-ify pkg/land as requested by Daniel
1125    o various changes to mnc including:
1126      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1127      - output can now be grouped so that all files within a group
1128          change the ITER portion of their names in lock-step together
1129      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1130          and works with both EXCH1 and EXCH2 (but needs more testing)
1131      - writing works for all verification test cases w/ g77 on Linux
1132    
1133    checkpoint57r_post
1134    o make MNC variable initialization happen earlier
1135    o add diagnostics for (almost) each term of the momentum Eq.
1136    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1137    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1138    o remove MINIMAL_TAVE_OUTPUT option ;
1139      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1140    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1141      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1142    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1143    o add time-dependent SST, SSS control
1144    o cost terms in ecco/ modularized (new cost_generic.F)
1145    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1146    o new infrastructure for seaice model vs. obs misfits in seaice/
1147      * driver from the_main_loop.F is seaice_cost_driver.F
1148      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1149      * gradient check in Exp. 6a of natl_box_adjoint/
1150    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1151      (see README file)
1152    
1153    checkpoint57q_post
1154    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1155    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1156      - bug was reported by Jean-Michel and Ian Fenty
1157    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1158      update exp. cpl_aim+ocn output.
1159    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1160      Needed for high-res. runs with large global files
1161      to be able to limit tapelev size
1162    o Changed some tests for adjoint:
1163      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1164      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1165      * global_ocean.90x40x15/ back to default 3-level checkpointing
1166    o Modifications to enable scripted COMMON to MODULE conversion
1167      * verification/OpenAD/code/ has necessary scripts and description;
1168      * converts, compiles and runs successfully;
1169    
1170    checkpoint57p_post
1171    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1172    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1173      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1174    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1175    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1176      (was already the case for dissipation with mom_vecinv,
1177       and also the case for grad.PhiHyd when staggered-timeStep)
1178      This will allow to put dissipation out-off the AB time-stepping.
1179     Unfortunately, affects truncation error. Update output of exp. that "fails"
1180      (cg2d matching number) and leave the others for later: front_relax(10),
1181      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1182      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1183    
1184    checkpoint57o_post
1185    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1186      (2) its ready to be documented during the 20050801 DocFest
1187    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1188      for ideal_2D_oce and lab_sea on linux_ia32_g77
1189    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1190      in global1x1_tot/code_seaice_adj to access indices 32, 33
1191      (worth another tag)
1192    
1193    checkpoint57n_post
1194    o adding precip control xx_precip 32
1195    o adding swflux control xx_swflux 33
1196    o Replacing 10 forcing penalty cost routines by 1 generic.
1197    o Implementing partitioning in time-mean and variable adjustment
1198      for atmos. state.
1199    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1200    o in natl_box_adjoint:
1201      * updated exp 1 to 10
1202        (but does not have time-mean vs. variable split results yet)
1203    o updated global1x1/*_seaice_adj/
1204      to incorporate latest changes
1205    o enable useSingleCpuIO for mdsio vector routines
1206      (applies in particular to tapelev I/O)
1207    o removed inefficient K-loop in all active_file*control*.F
1208    
1209    checkpoint57m_post
1210    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1211      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1212    o pkg/exch2: filling of face-corner halo regions is optional
1213      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1214    
1215    checkpoint57l_post
1216     tag before updating tutorials (pre-release-2)
1217    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1218       for output and interpolation of input fields onto model grid)
1219    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1220       Affects results of exp. rotating_tank ; update output.txt.
1221    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1222          and taking the square quantity and/or using a fraction-weight field.
1223    o fix aim_diagnostics_init.F mate numbers.
1224    o add mnc output capability to diagnostics/diagstat and update
1225      our cvsignore files for the ACSII output generated
1226    
1227    checkpoint57k_post
1228    o lab_sea now uses diagnostics package and provides a suite of
1229      new EXF diagnostics output.
1230    
1231    checkpoint57j_post
1232    o exf
1233      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1234        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1235        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1236      * extended diagnostics output
1237        - now includes all EXF variables
1238        - hs, hl moved to common block
1239        - separate S/R for diagnostics, called after ctrl vector is added
1240        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1241        - EXFqnet contains true Qnet (i.e. includes qsw)
1242      * updated verif. lab_sea, global_with_exf
1243      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1244        to ensure that diagnostics sees a true EXFqnet
1245    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1246    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1247      several times with different frequencies.
1248    o mnc-ify the thsice package as requested by Daniel Enderton
1249      - the monitor--MNC output needs work
1250      - many attributes need to be added (most are currently blank)
1251    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1252      - many attributes need to be added (most are currently blank)
1253    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1254    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1255    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1256      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1257         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1258    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1259     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1260    
1261    checkpoint57i_post
1262    o Diagnostics package was changed: diagnostic allocation is now deactivated
1263      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1264    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1265      add 1rst Order upwind vertical Shear.
1266    o add a quick fix for A/B checkpointing in OFFLINE mode
1267    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1268      end-run around the C/Fortran linking horror in eesup/src/timers.F
1269    o added pkg/runclock: allows user to terminate run based on wall clock
1270    o added non-hydrostatic scaling parameter: nh_am2
1271    o pkg/my82: futile attempt to make results compiler-independent by adding
1272      some "_d 0", etc. no effect.
1273    o for mnc output, fill the 'T' coordinate var with myTime and create a
1274      separate 'iter' variable for iteration count
1275    o pkg/diagnostics:
1276      add new capability: output of Global/Regional & per-level statistics ;
1277      tested against monitor output (including land & thSIce) on various exp.
1278    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1279    
1280    checkpoint57h_done
1281      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1282      data.diagnostics, data.gchem, data.ptracers) is done.
1283    
1284    o pkg/diagnostics: prepare for Global/Regional statistics.
1285      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1286    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1287      and rename it: DIFFERENT_MULTIPLE
1288    
1289    checkpoint57h_post
1290    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1291    o pkg/diagnostics: change output frequency, now in seconds (instead
1292      of Nb of iterations). This requires to change data.diagnostics.
1293    checkpoint57h_pre
1294    
1295    o in mnc, let the user create the output dir if both mnc_outdir_date
1296      and mnc_outdir_num are false
1297    o add fflags() to pkg/diagnostics which allows one to specify, on a
1298      per-file basis, the file precision [default behavior is unchanged]
1299    o added diagnostics to pkg/kpp, including computation of mixed layer
1300      depth based on a temperature/density criterion
1301    o updated verification/natl_box to test the new pkg/kpp diagnostics
1302    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1303    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1304    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1305      not mnc -- this mistake was found by JMC and is now corrected
1306    
1307    checkpoint57g_post
1308    o add Adams-Bashforth 3rd Order time stepping:
1309      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1310      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1311    checkpoint57g_pre
1312    
1313    o make lambda[Theta,Salt]ClimRelax spatially varying
1314      (default remains spatially uniform constant based on tau)
1315    o added new control variables
1316      * init. uVel, vVel, etanN
1317      * lambda[Theta,Salt]ClimRelax
1318    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1319      (suggested by G. Forget)
1320    
1321    checkpoint57f_post
1322    o add parameter "baseTime" = model base time = time at iteration zero
1323      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1324      account for baseTime shift
1325    o move Coriolis arrays from PARAMS.h to GRID.h
1326    checkpoint57f_pre
1327    
1328    o mnc-ifying the seaice package
1329    o introduced an alternative length scale calculation for use in the limiting
1330      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1331    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1332    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1333      as well as grad(vort3).  Made it compatible with both approximate form
1334      for the cubed sphere and full form of these gradients.  Added flag
1335      useFullLeith to select between approximate and full form.  
1336    o add "d0" in getcon.F to reduce differences between compilers/platforms
1337      update output.txt of exp. fizhi-gridalt-hs
1338    o change port_rand funtion to allow to set the seed.
1339    o fix obscure MNC bug involving conversion between reals and integers
1340      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1341        new version is now more standards-compliant
1342    o adjoint-related modifications
1343      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1344      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1345      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1346    
1347    checkpoint57e_post
1348    o Adding eddy stress controls a la Ferreira et al.
1349    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1350    
1351    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1352      update output.txt of exp. fizhi-gridalt-hs
1353    o add more "Z" dimensions and associated coordinate vars to MNC
1354    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1355    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1356      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1357      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1358      months and years.  Requires pkg/cal.
1359    o diagnostics: add pickup functionality
1360      - off by default for backwards compatibility
1361      - current version only uses MDSIO -- MNC will be added
1362    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1363    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1364    
1365    checkpoint57d_post
1366    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1367    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1368      output from the diagnostics package
1369    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1370    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1371      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1372    o add coordinate variables to the MNC output from the diagnostics package
1373    o change MNC-flags default value: true when useMNC=TRUE
1374    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1375      the ability (off by default) to read the grid information using MNC
1376    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1377    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1378    o do snap-shot diagnostics at the middle of the time-interval (instead of
1379      at the end).
1380    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1381      new test for AIM with thSIce + slab-ocean
1382    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1383    o move state variable diagnostics to the beginning of the time step ;
1384      (note: still needs some work specially for snap-shot diagnostics)
1385      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1386    
1387    checkpoint57c_post
1388    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1389    o generate new output.txt files on faulks with g77 & the new -ieee option
1390    checkpoint57c_pre
1391    
1392    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1393      update output.txt of exp. global_ocean.90x40x15
1394    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1395      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1396    o add saltFlux(+File) forcing capability with periodicExternalForcing
1397    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1398    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1399    o improvements for the MNC output from DIAGNOSTICS:
1400      - correct handling of the unlimitied dimension
1401      - all dims now have associated coordinate variables
1402      - variables located at U, V, and Corner ("Z") points are now written
1403        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1404        *all* data points are output
1405    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1406    o added pkg/seaice/seaice_monitor.F
1407    o mdsio_readfield.F can now read files visible only to master MPI process.
1408    o pkg/seaice: some test code for ice-modified ocean stress
1409    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1410      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1411      spurious negative numbers for precipitation and humidity.  Will cause
1412      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1413    o pkg/ctrl/
1414      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1415        May be enabled via doPackDiag
1416      *  introduce z-scaling of
1417         + gradient (doZscalePack) and
1418         + control (doZscaleUnpack)
1419    o pkg/mdsio/
1420      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1421      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1422    
1423    checkpoint57b_post
1424    o simplify options in diagnostics_fill arguments (remove weird combinations)
1425    o fix MNC coordinate variables so that they now contain per-face index
1426      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1427      general, EXCH2 grids are only aligned to a "local" coordinate system
1428    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1429    o Implement instantaneous output within pkg diagnostics:
1430      setting a negative frequency in data.diagnostics produces
1431     "snap-shot" output (as opposed to time-average if freq > 0)
1432    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1433      NOTE: change ptracer diagnostics name: use 2 characters to work with
1434            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1435    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1436      becomes the coordinate variable for the 'T' dimension
1437    o add CF-style coordinate variables to MNC
1438      - just a first cut:  numbers are meaningless on the cubesphere and
1439        missing along the T axis but otherwise it works!
1440    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1441    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1442    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1443      this is based directly on what the model compute, so that the content of
1444      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1445    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1446    o clean up build options files for SunOS, in particular
1447      - remove -traditional from xmakedepend
1448      - change -xarch=v9 to -xarch=native for f77
1449      - restore use of make (not gmake)
1450      - add CC=gcc if using g77
1451    o changes per discussion of AM, JMC, & EH3 today:
1452      - move redundant "grid" variables out of "state" -- in preparation of
1453        creating proper CF-style coordinate variables and in recognition
1454        that any/all grid variables can be easily copied (eg. w/NCO) from
1455        the grid files into any of the other NetCDF files
1456      - *always* output grid variables with MDSIO (this will eventually be
1457        changed)
1458      - output MNC grid file if useMNC is true
1459    o every instance of _END_MASTER() has been found and replaced with
1460      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1461      preprocessors
1462    o re-arrange diagnostics pkg initialisation:
1463     - allow each package to extend the available diagnostics list
1464     - add some checking and fix small problems (multi-threaded, ...)
1465     - new S/R diagnostics_fill (replace fill_diagnostics):
1466       look through the short list of active diag. (instead of the long list)
1467       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1468    
1469    checkpoint57a_post
1470    o this set of changes restores TAMC compatibility
1471      tested for global_ocean.90x40x15 adjoint on trough
1472      (what a pain)
1473    
1474    checkpoint57a_pre
1475    o some modifs in tools/build_options for sunos
1476    o call ctrl_pack for ctrl at end for optimcycle=0
1477    
1478    checkpoint57
1479    o add horizontal bi-harmonic viscosity for vertical velocity
1480      - new parameter viscA4W (defaults to viscA4)
1481      - affects only non-hydrostatic code
1482      - to be done: no-slip lateral boundary conditions
1483    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1484    o implement Implicit Vertical advection for pTracers
1485    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1486      (implemented also for implicit vertical diffusion & advection)
1487    o OBCS: extend application of tracer open boundary conditions
1488      to a strip beyond the boundary of width Olx/Oly
1489    o add call monitor to TAF set of required calls (flow directives)
1490      and include in natl_box_adjoint
1491    o untangle a few ifdefs related to cost, ctrl, autodiff
1492      untangel a few ALLOW_ECCO_OPTIMIZATION
1493    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1494      (theta2, salt2 in ecco_cost_weights)
1495    
1496    checkpoint56c_post
1497    o OBCS as control variables
1498      - update ctrl_ad_diff.list, obcs_ad_diff.list
1499      - remove balance of obcs controls from default
1500      - fix index bug nobcs in ctrl_init
1501      - fix dummy fields filen in ctrl_pack
1502      - add dummy weights for obcs
1503    o lsopt: comment out fort.94 output
1504    o optim:
1505      - remove unnecessary header files
1506      - adjusted namelists
1507      - add xerbla.F to Makefile
1508    o exf:
1509      - multiple modifications of exf_check_range
1510      - unit change in exf_init_runoff from [m/year] to [m/s]
1511    o mdsio:
1512      - i/o-vector change debugLevel from debLevA to debLevB
1513    
1514    checkpoint56b_post
1515    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1516      is called from DO_THE_MODEL_IO
1517      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1518      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1519      - clean up PTRACERS_WRITE_TIMEAVE a little
1520    o add another verification experiment that tests both the cfc-pkg and
1521      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1522      reactive tendencies treated inline with regular timestepping
1523    o testreport previously did a lousy job of comparing small numbers, so
1524      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1525      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1526      testreport.
1527    o ptracers_monitor: bug fix for MPI
1528    
1529    checkpoint56a_post
1530    o GCHEM: finish reorganizating the package
1531      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1532        (introduces another 3D-array for each passive tracer, but only if
1533        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1534        gchemTendency is not needed because the timestep is done separately)
1535      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1536      - GCHEM is now---more or less cleanly---separate from PTRACERS
1537      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1538        so clear to me how that should be done in a general way.
1539    o CFC: improve formatting of output in CFC_ATMOS
1540    o PTRACERS:
1541      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1542        that ALL experiments with ptracers enable can be checked. This makes
1543        GCHEM_MONITOR obsolete.
1544      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1545        monitorFreq
1546      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1547    o add PTRACERS (PTR0[1-5]) to testreport output
1548    o exf_check_range:
1549      * default changed to .TRUE.
1550      * will check values for niter0 if debLevA, every timestep if debLevB
1551      * STOP in exf_check_range if 'out of range'
1552      * range chosen generous to allow for potential extema
1553      TBD: a version with stricter range
1554           permitted range would be runtime parameters
1555    o GMredi:
1556      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1557      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1558      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1559    o GCHEM:
1560      - move call to GCHEM_FORCING_SEP, so that it is now called before
1561        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1562      - introduced a useGCHEM runtime flag and applied it everywhere.
1563      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1564        this flag is now only visible within GCHEM-pkg routines.
1565      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1566        be replaced by a 3D array that is computed before thermodynamics; for
1567        this, the tracer ID iTracer had to be included into the parameter list
1568        of ptracers_forcing
1569      - set up forward_step to call gchem_forcing, that will replace
1570        gchem_forcing_int in ptracers_forcing
1571      - cleaning up
1572    o small cleaning of exch2: remove files that are also in eesupp/src
1573    
1574    checkpoint56
1575    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1576    o mnc: cleanup "full" files--fixes out-of-memory problem
1577    o ECCO-GODAE
1578      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1579      * fully merged and updated from SIO code
1580        windstress sign change affects
1581        - exf_inscal_[u/v]stress
1582        - sign of xx_tau[u/v] adjustments
1583        - signs in cost_scat
1584      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1585      * natl_box_adjoint updated and compressed
1586      * 2-level checkpoint switch added
1587        (tested in EXP. 1 of natl_box_adjoint)
1588      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1589    o SVD
1590      * first complete, non-hacked version for SVD calculations
1591      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1592        performed via direct access files admtlm_vector.it????
1593        (via ctrl_[un]pack)
1594      * optimcycle is used for ARPACK iteration counter
1595        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1596      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1597        and add linear transforms where necessary
1598      * controls are initial/final SST, SSS (can be extended; need to check
1599        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1600    o mdsio: filename info to both stderr, stdout
1601    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1602      from sign change
1603    
1604    checkpoint55j_post
1605    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1606      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1607    o add consistent build directories and .cvsignore files to verification
1608    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1609    o make all subroutines 30 or less characters in length for certain older
1610      compilers to work (a thorough search only turns up two routines in
1611      pkg/ptracers)
1612    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1613      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1614    
1615    checkpoint55i_post
1616    o change arrays for total vertical diffusivity (2.D if explicit,
1617      3.D if implicit) ; each ptracer uses its own background value.
1618    o added mnc/NetCDF output capability to ocn_compon_interf
1619      - added bits to verification/cpl_aim+ocn so that it can run on
1620        ITRDA and other clusters without the mpirun "-wd" option
1621    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1622      configuration
1623    o give MNC the ability to create additional files rather than
1624      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1625      - the default is just less than 2GB which is a practical limit
1626        on many systems
1627    o Compute the non-local term using either KPP vertical diffusivity (=default)
1628       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1629    
1630    checkpoint55h_post
1631    o add verification test "vermix"
1632    o remove all the *_ioinc flags and replace with the single global
1633      outputTypesInclusive flag
1634    o allow to set a vertical profile of vertical diffusivity for T & S
1635    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1636    o useMNC moved from data.mnc to data.pkg
1637    
1638    checkpoint55g_post
1639    o Renaming carbon AD experiments to comply with testreport conventions
1640    o Updating adjoint of Held-Suarez hs94.1x64x5
1641    o Fixing directives for non-ECCO forward_step, after ECCO directives
1642      have been fixed to avoid recomp. of do_oceanic_phys
1643      Works well for global_ocean.90x40x15,
1644      but recomp. issue remains for carbon
1645    o Updating adjoint output for natl_box_adjoint after
1646      pkg/ecco has been modified (see taga c55d_post)
1647    
1648    checkpoint55f_post
1649    o rename to timeave_init_fixed
1650    
1651    checkpoint55e_post
1652    o some delicate re-shuffle of store directives to avoid one
1653      extra call of do_oceanic_physics
1654      affects ecco_the_main_loop.F, do_oceanic_physics.F
1655      checkpoint_lev1_directives.h
1656    o NB: this may break global_ocean adjoint temporarily,
1657      but it is clear how to fix it. Will do later, need this now.
1658    
1659    checkpoint55d_post
1660    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1661    o ecco_cost_weights is modified to 1x1 runs
1662    o modifs to allow observations to be read in as
1663      single file or yearly files
1664    o enable to read exf forcing fields as either
1665      single file or yearly files (flag useExfYearlyFields)
1666    checkpoint55d_pre
1667    
1668    o switch between 2-level and 3-level checkpointing
1669    o add ability of MNC to write local and "partial" (eg. 2D slices where
1670      the full 3D field is never actually stored) arrays to NetCDF files
1671      with the correct (that is, the complete multi-dimensional) set of
1672      array indicies
1673      - used in mom_vecinv() to write the diagFreq output
1674      - tested (demonstrated) in verification/aim.5l_cs
1675    o further mnc-ification
1676      - add verification/lab_sea to the list with mnc setups
1677      - fix undefined mnc v-names in cd_code
1678      - add kpp to mnc output (both snapshot and timeave)
1679    o non-hydrostatic code
1680      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1681        in calc_gw.F
1682      - defaults to viscAh
1683      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1684        friction or Leith) in non-hydrostatic mode, as long as there is
1685        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1686    o pkg/cost
1687      extend simple cost functions to treat time mean quantities
1688      (T,U,V) via cost_accumulate_state from cost_tile
1689    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1690        be 2 times larger than the minimum size the advection scheme requires.
1691        now get a perfect conservation of salt in advect_cs test-exp (updated)
1692    o GGL90 (Gaspar's TKE mixed layer)
1693      - add horizontal diffusion of TKE, requires exchanges in
1694        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1695        default. In OPA there is no horizontal diffusion of TKE but the
1696        mixing coefficients are computed from a horizontal average of TKE of
1697        6 points or so. I think that diffusion has a little more physical
1698        justification.
1699      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1700        was in vain)
1701      - mask tke-variable in ggl90_init
1702    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1703    o fix biharmonic diffusion on CS-grid.
1704    o more obcs stuff
1705      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1706        for reading boundary values. This routine is called from
1707        obcs_prescribe_read
1708      - updated obcs_check
1709      - changed sponge layer relaxation parameter units for days to seconds
1710      - turned off sponge layer by default
1711      - changed argument list of OBCS_CALC to myTime+deltaTclock
1712      - fixed about 35 bugs in obcs_external_fields_load
1713    
1714    checkpoint55c_post
1715    o obcs stuff
1716      - new runtime flags useOBCSprescribe, useOBCSbalance
1717      - re-arranged obcs_calc
1718      - moved exf_getobcs to obcs_prescibe_read
1719        obcs_prescibe_read is called after ORLANSKI stuff
1720        and independent of it (executable can contain all).
1721      - updated obcs_check
1722      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1723        These may be necessary only if tangential velocities are
1724        prescribed at OB, not sure, needs testing.
1725    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1726      which simplifies the calls and passes the ifc check-bounds test
1727    
1728    checkpoint55b_post
1729    o add a 2D scalar, Z location, exchange_2 routine.
1730    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1731      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1732      affects advect_cs results (for the wrong reason): update output.txt
1733    o use a more standard discretization for biharmonic viscosity ;
1734     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1735      affects results of dome set-up: update output.txt
1736    o fix gad_advection.F (CubedSphere part), back to version 1.23
1737    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1738    
1739    checkpoint55a_post
1740    o merged code to
1741      * prescribe/read time-dependent open boundaries
1742        (works in conjunction with exf, cal)
1743      * sponge layer code for open boundaries
1744      * each boundary N/S/E/W now has its own CPP option
1745        (healthy for the adjoint)
1746    
1747    checkpoint55
1748    o up-to-date adjoint of previous breaks
1749      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1750      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1751      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1752      - carbon: * remove tr1-related adjoint verification
1753                * add ptracer as control variable
1754    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1755      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1756    
1757    checkpoint54f_post
1758    o in verification/carbin/ remove experiment related to
1759      ALLOW_PASSIVE_TRACER (array tr1 etc)
1760      code_ad/ input_ad/ results_ad
1761    
1762    o add two new packages
1763      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1764        + subject to optimization (memory)
1765      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1766        + subject to reordering (many GOTOs in the original code)
1767        + so far opps is called for every (i,j) point, and then operates in
1768          the vertical; one may want to reorder the scheme in order operate in
1769          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1770          fields)
1771    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1772      - all verification tests compile and run with linux_ia32_g77
1773      - defaults are compatible with current input files--nothing
1774        should change if you were not previously using MNC
1775      - MNC output has been added in numerous places (eg. timeave)
1776        but there are still a few writes not yet do-able with MNC
1777        (this is in progress)
1778      - flags now allow for either/or/both use of MDSIO and MNC and
1779        documentation will soon follow
1780      - numerous small formatting cleanups for ProTeX
1781    o add version info (via BUILD_INFO.h) to MNC and stdout
1782    
1783    checkpoint54e_post
1784    o add two new packages
1785      - pp81 (Packanowski and Philander, 1981), Richardson number and
1786        stratification dependent mixing
1787      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1788      - these scheme operate in a similar manner as KPP (without ghat, of
1789        course), however there is only one diffusivity that is used for both
1790        temperature and salinity (and passive tracers)ç
1791    o add offline package
1792    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1793      provided by Stephanie Dutkiewicz
1794    o genmake2: add ability to search for C compilers and cleanup test output
1795      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1796    
1797    checkpoint54d_post
1798    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1799    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1800      leading to additional shift by 5 days each year of integration
1801       (i.e. leading to considerable offset over the years)
1802    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1803    o start with no AB and no initial filtering (staggerTimeStep):
1804      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1805    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1806      (external loading & cpl import/export stay in forward_step.F)
1807    o update coupling interface to work with new staggerTimeStep
1808    o change MDSIO ptracers_pickup.
1809    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1810    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1811    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1812    
1813    checkpoint54c_post
1814    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1815      this affects (truncation error) output.txt of test-exp:
1816       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1817    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1818    o change Qnet to always be the net heat flux, (+upward).
1819      affects (truncation error) output of natl_box exp.: updated
1820    o define the max number of passive tracers in PTRACERS_SIZE.h
1821    o start to test mnc routinely in exp0
1822    o add sea-ice loading (sIceLoad) as a new forcing field.
1823    
1824    checkpoint54b_post
1825    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1826       impressive on Altix and Opteron systems)
1827    o diagnostics can now write NetCDF files through the mnc package
1828    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1829    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1830    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1831      affects (truncation error) output of lab_sea & natl_box exp.: updated
1832    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1833    
1834    checkpoint54a_post
1835    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1836    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1837    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1838    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1839      + internal_wave (shift in writing cg2d_ini_res)
1840    checkpoint54a_pre
1841    
1842    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1843      - modified verification/lab_sea and natl_box_adjoint accordingly
1844    
1845    checkpoint54
1846    checkpoint53g_post
1847    o prepare splitting of thermodynamics: store convect.counter in common block
1848    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1849      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1850    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1851    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1852    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1853    o restore adjointability
1854    
1855    checkpoint53f_post
1856    o modifications that affect AIM experiment results (update output.txt):
1857      - no advection of S at top interface Nr (pkg/generic_advdiff)
1858      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1859    o AIM pkg:
1860      - include stability function into surf.Flux derivative relative to Tsurf
1861      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1862    
1863    checkpoint53e_post
1864    o merged cylindrical coord configuration
1865    o added rotating_tank experiment
1866    checkpoint53e_pre
1867    
1868    checkpoint53d_post
1869    o faulks upgraded: re-generate output.txt that have changed:
1870       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1871    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1872    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1873    o added Sadourny discretization of Coriolis
1874      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1875      - re-enabled use of omega3 (useAbsVorticity)
1876    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1877      vector-invariant equations
1878      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1879    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1880      hopefully without new bugs
1881      - still to do: biharmonic friction for non-hydrostatic w
1882    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1883    o regenerated output for global_ocean_ebm (using -ieee)
1884    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1885      of mom_common/
1886      - simple re-arrangement of instructions within computing loop
1887    checkpoint53d_pre
1888    
1889    checkpoint53c_post
1890    o new version of coupler for AIM+thSIce and Ocean models
1891     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1892     - land: change Evaporation of snow
1893     - aim with thSIce: fix bug in snow-precip.
1894    o changes to calc_gw.F
1895     - bug fix for w^2 term near the bottom boundary
1896     - (hopefully) improve the lateral slip boundary condtions for use with
1897        partial/looped cells
1898      - because the bug fix changes two verification experiments anyway (exp5
1899        and plume on slope), change the lateral boundary condition from half slip
1900        to the value of no_slip_sides
1901    o ebm package wasnt quite up to the parallel task. Fixed that.
1902    o Adjoint of EBM package + verification
1903      * TLM OK
1904      * ADM not sufficient accuracy yet (needs further testing)
1905    
1906    checkpoint53b_post
1907    o Commiting new energy balance model to repository
1908      * package is pkg/ebm
1909      * verif. is verification/global_ocean_ebm
1910      * references are in ebm_driver.F
1911    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1912    C        Global thermohaline circulation. Part I:
1913    C        Sensitivity to atmospheric moisture transport.
1914    C        J. Climate 12(1), 71-82
1915    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1916    C        Global thermohaline circulation. Part II:
1917    C        Sensitivity with interactive transport.
1918    C        J. Climate 12(1), 83-91
1919    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1920    C        Destabilization of the thermohaline circulation
1921    C        by atmospheric eddy transports.
1922    C        J. Climate 7(12), 1870-1882
1923    o Will need long integration testing.
1924    checkpoint53b_pre
1925    
1926    o created pkg/mom_common in preparation for variable viscosity code
1927    o renamed and split ini_mnc_io
1928    o pkg/land: only liquid water can diffuse or run-off
1929    o AIM using land: soil wetness availability account for snow
1930    o added printMapIncludesZeros to EEPARMS namelist
1931    
1932    checkpoint53a_post
1933    o restore TAMC compatiility for exf_constants.h
1934      (no usage of _d in .h)
1935    o Additional storing in KPP in an attempt to fix
1936      TAMC problem with adjoint of KPP code.
1937      (no success...)
1938      Identical code works fine with TAF.
1939    o Fixed verification/natl_box_adjoint experiments.
1940      Initial conditions for Experiments 4 and 5 are now
1941      set to "SEAICE_initialHEFF=0", which is more reasonable,
1942      and hence gives results closer to that of Experiment 2.
1943      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1944    
1945    checkpoint53
1946    o stable checkpoint with up to date adjoint
1947      TLM tests only run for 1st grdchk at the moment. Its unclear if
1948      this is a code problem or a problem with resetting code for g_
1949      variables that is being autogenerated wrong.
1950      Otherwise:
1951       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1952       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1953         are both still in chaos following their security messes.
1954    
1955    checkpoint52n_post
1956    o various build (mostly genmake2) changes including:
1957      - ability to build/run more easily within Cygwin and MacOS X
1958      - more complicated Makefiles with a stronger dependence on Gnu Make
1959    o pkg/seaice modifications
1960      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1961        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1962        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1963      - changed proxy for geostrophic velocity and updated
1964        verification/lab_sea/results/* accordingly
1965      - removed ADI dynamic solver from pkg/seaice
1966      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1967        they caused a segmentation fault under certain circumstances
1968      - removed unused field WATR
1969    o bug fix in exf-package:
1970      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1971         now reflect that.
1972    o small fixes in the cal-package:
1973      - set reference date to first of January for the 'model'-calendar
1974      - failing of cal_CheckDate in cal_FullDate now actually results in a
1975        warning
1976    o small modifications in exf-package to increase flexibility:
1977      - change climtempfreeze from a constant to a runtime parameter that
1978        is specified in data.exf_clim (default = -1.9)
1979      - introduce runtime parameter windstressmax (default = 2.0) that is
1980        specified in data.exf
1981    o fix in pkg/thsice:
1982      - update Evap (Tsf changes) to be consistent with Latent heat flux
1983      - maintain snow precipitation unchanged (even if Tsf >=0).
1984     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1985    
1986    checkpoint52m_post
1987    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1988      this does not change any of the results, because myIter=0 in swfrac always
1989      lead to jwtype=2 (the default anyway), but the call makes little sense
1990      as a default
1991    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1992    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1993      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1994    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1995    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1996    o extending useSingleCpuIO option to work with new exch2 I/O format
1997      - old-style, missing-tile I/O is still accessible by defining CPP
1998        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1999    o monitor package can write to NetCDF files and/or STDOUT
2000    o fix re-definition bug in MNC_GRID_INIT_ALL()
2001    o doc/api_reference added
2002      - a framework for building an API Reference Manual using all
2003        the "protex" comments embedded in the code
2004      - see pkg/generic_advdiff, pkg/mnc for examples
2005    o MNC:
2006      - make myThid the last argument for all subroutines
2007      - new default for the grid files: NO halos
2008      - add useMNC and other run-time flags
2009      - separate per-file-group handling of the unlimited dimension
2010      - early initialization of MNC w/ flags read at the eeboot stage
2011        and lookup tables set in initialize_fixed
2012      - write all MNC output to a freshly-created directory
2013    o thermodynamics sea-ice (thsice) is now tested with testreport.
2014    o test exp. advect_cs: use the standard cs32 grid ; update output.
2015    o Added functionality to grdchk:
2016      pick global i,j,k position (or nearest wet) where to perform check.
2017    
2018    checkpoint52l_post
2019    o new land formulation:
2020      a) use ground enthalpy as prognostic variable to ensure exact
2021         energy conservation.
2022      b) account for water temperature and for latent heat of freezing
2023         in all processes (rain, run-off, ground storage)
2024      c) compute surface and ground temperature implicitly.
2025    o aim_v23 modification for new land model:
2026      a) Treat separately land / ocean / sea-ice surface fluxes
2027         to allow implicit computation of land & sea-ice surface temp.
2028      b) add snow precipitation.
2029    checkpoint52l_pre
2030    
2031    o fix problem (when 1 tile is empty) in min/max monitor.
2032    o fix bug in timeAve (u,vZetatave in common block)
2033    o no restoring terms under ice for pkg/seaice
2034    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
2035    o bug fix for pkg/seaice pickups
2036    o change MNC call locations and add coordinate attributes
2037    o mask vorticity at the corner ; affects global_ocean.cs output
2038    o fix ini_curvilinear_grid ; test CS experiments with mpi
2039    o aim.5l_cs: modify sea-ice fraction input file ; update output
2040    o exf: Adding simple range check routine for exf fields after read
2041    
2042    checkpoint52k_post
2043    o removed top-level directory "diags"
2044      - we migrated these functions to pkg/timeave a long time ago
2045    o fixed bug introduced in pkg/monitor
2046    o accuracy ctrlprec = 32 insuffient for gradient checks using
2047      averaged fields (I/O via cost_averages)
2048      -> use ctrl.h in active_file*.F to control I/O precision.
2049    o paramter list of CALL ADTHE_MAIN_LOOP
2050    o added initial do_the_model_io to ecco
2051    o set all ...Freq to zero after cost_final
2052      taveFreq, dumpFreq, pChkptFreq
2053    o MAIN and ECCO differentiability restored
2054    
2055    checkpoint52j_post
2056    o fix nchklev in tamc.h for global_ocean...
2057    o Bringing flow and store directives up-to-date
2058    o Really weird thing!
2059      call do_the_model_io from the_main_loop with parameters
2060      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2061      TAF places a faulty re-call of initialise_varia
2062      after cost_final call which should not be there!
2063    checkpoint52j_pre
2064    
2065    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2066      error messages
2067    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2068    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2069      debug output
2070    o modfied mdsio_writefield.F to handle non-global files under exch2
2071    o update AIM Cubed-Sphere exp (aim.5l_cs):
2072      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2073    o update AIM Equatorial Channel exp:
2074      use standard aim_v23 pkg and change the SST fields to be more realistic.
2075    o globalFile now works with exch2
2076    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2077      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2078    o limit timeave output for hi-res integrations
2079    
2080    checkpoint52i_post
2081    o removed CPP_EEOPTIONS.h from verification/*/code
2082    o updated the tiling for global_ocean_pressure
2083    checkpoint52i_pre
2084    
2085    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2086      the old pkg/aim).
2087    
2088    checkpoint52h_pre
2089    o shortened offending lines in exch2_send_rx?.template
2090    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2091    o genmake2: add build & execute test for NetCDF code
2092    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2093      old grid files, moved CPP_EEMACROS.h to pkg/exch2
2094    o added useSingleCPUIO flag to monitor.F and mon_out.F
2095    o added temporary hack for sea-ice dynamics on the cube:
2096      metric terms are ignored and it is assumed that
2097      there is no sea-ice on cube faces 1, 2, 4, and 5.
2098    
2099    checkpoint52f_post
2100    o added exch2 cube routines to pkg/exch2
2101    o modified hs94.cs-32x32x5 to use it
2102    o added new grid files to hs94.cs-32x32x5
2103    checkpoint52f_pre
2104    
2105    checkpoint52e_post
2106    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
2107      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
2108    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
2109      to work with implicit vertical advection and AB ;
2110    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
2111    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
2112     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
2113    checkpoint52e_pre
2114    
2115    o fix bug in impldiff when Nr=1 or Nr=2.
2116    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
2117    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
2118    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
2119      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
2120    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
2121    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
2122    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
2123    
2124    checkpoint52d_post
2125    o re-tiled many expts to allow comparison in multi-processor mode
2126      - updated output accordingly
2127      - changed hs94.128x64x5 to use intial T from file rather than use the
2128        random number generator
2129    o add infrastructure in model routines for fizhi and gridalt packages
2130    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
2131    o changes to permit hi-res, cubed-sphere, configuration
2132      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
2133      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
2134      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
2135        of surface winds for the cube
2136      (A verification experiment, based on global_ocean.cs32x15, but with
2137       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
2138       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
2139       complete with example surface forcing files and matlab scripts to look
2140       at the output and compare it with that of global_ocean.cs32x15.)
2141    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
2142       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
2143       to conform to the common rule.
2144    o check-in the first version of the coupler + interfaces for multi-components
2145       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
2146       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
2147       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
2148       - ocean and atmos. share the same horizontal grid (no interpolation).
2149       - exchanges between component and coupler is done in forward_step
2150    o new verification experiment, cpl_aim+ocn:
2151       coupled ocean - AIM atmosphere on cs32 grid.
2152    
2153    checkpoint52d_pre
2154    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2155    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2156    
2157    checkpoint52c_post
2158    o Fixing OPTIONS files for use of exf:
2159      - ALLOW_ECCO not needed
2160      - ECCO_CPPOPTIONS.h should not be included from
2161        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2162        as has been the case in the past
2163      - All cal/exf related options are currently set in
2164        single header file. Should remain so until we
2165        agree on a consistent new policy.
2166    o Removed all CPP options for cal package.
2167      cal has no more CPP options.
2168    o modified STOREs in GAD_ADVECTION
2169    o corrected key comp. for passkey
2170    
2171    checkpoint52b_post
2172    o new version: "thsice" of thermodynamic sea-ice pkg:
2173     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2174     - modify fluxes but do not change theta directly;
2175     - light cleaning of bulk_force pkg (still needed with thsice).
2176     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2177       + output_thsice.txt to test thsice & bulk_force pkgs.
2178    o put back grid & coriolis monitor output.
2179    checkpoint52b_pre
2180    
2181    o call "do_the_model_io" at the beginning (=> dump initial state)
2182    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2183    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2184      (need info on NUMBER_OF_PTRACERS)
2185    o missing PTRACERS headers in some routines
2186    o default tamc.h in pkg/autodiff supposed to crash
2187      to ensure proper customization
2188    
2189    checkpoint52a_post
2190    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2191      - moved surfaceTendencyTice from pkg/seaice to main code
2192      - subroutine FREEZE_SURFACE now limits only surface temperature
2193        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2194        => new output.txt for global_ocean.cs32x15 & global_with_exf
2195      - keep the old version of FREEZE for backward compatibility;
2196        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2197      - corresponding modifs for TAF directives
2198    o added surface flux output variables to TIMEAVE_STATVARS
2199    o time-averaged output for pkg/ptracers
2200    o fix problem with ECCO-related divided adjoint
2201      snapshot file was missing some ad-variables,
2202      but no warning issued by TAF
2203    
2204    checkpoint52a_pre
2205    o some bug fixes for #undef REAL4_IS_SLOW
2206    
2207    checkpoint52 = ecco_c52_e35
2208    o after testing adjoints of checkpoint51u_post
2209    
2210    checkpoint51u_post
2211    o this is the post-merge tag of the ecco-branch
2212      (needs another clean checkout and re-testing)
2213    o various natl_box_adjoint configs and results
2214      but no input fields
2215    o obcs adjoint not yet merged!
2216    o adding ECCO global 1x1 and 2x2 degree configs
2217    o updated/extended some store directives for seaice
2218    o pkg/ecco now containes ecco-specific part of cost function
2219    o top level routines the_main_loop, forward_step
2220      supersede those in model/src/
2221      previous input data.cost now in data.ecco
2222      (new namelist ecco_cost_nml)
2223    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2224    
2225    checkpoint51t_post
2226    o this is the pre-merge tag of the ecco-branch
2227    
2228    checkpoint51s_post
2229    o cleanup: removed various obsolete #define-s
2230    o pkg/grdchk
2231      - renamed 'ph-grd 3' to 'grad-res'
2232      - merged from ecco-branch
2233        (remaining bug fixes for obcs gradient checks)
2234      - additional high-precision output for testreport
2235        (grep for 'precision_grdchk_result')
2236    
2237    checkpoint51r_post
2238    o cleaned up or removed CPP_OPTIONS.h files
2239    o updated results for some of the tests to reflect the new
2240      optfiles (-ieee: -O0 instead of -O3)
2241    
2242    checkpoint51q_post
2243    o cd_code:
2244      - moved cd_scheme.F -> cd_code_scheme.F
2245      - separate read_checkpoint from cd_code_ini_vars.F
2246      - separated cd_code part from write_checkpoint
2247      - updated AD_SOURCE, generated .flow
2248      - added CD_CODE_VARS.h to the_main_loop
2249      - Moving cd_code specific store dir.s to pkg/cd_code
2250    o ctrl package totally restructured
2251      - pack/unpack now optional and decoupled from
2252        xx_/adxx_ I/O
2253      - ctrl_pack/unpack cleaned
2254        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2255      - confined inclusion of AD_CONFIG.h to where necessary.
2256    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2257    
2258    checkpoint51p_post
2259    o create initial cd_code package
2260      - WARNING: the initialization of fields within packages
2261        is broken because INI_FIELDS (where READ_CHECKPOINT is
2262        called) is called *before* PACKAGES_INIT_VARIABLES.
2263        This seems to be backwards since
2264        1) its important to initially zero the entire field including
2265           the "halo" region
2266        2) zeroing needs to be done *before* reading pickup info
2267           and the pickup call might or might not happen in any
2268           particular run
2269      - this needs an overhaul for R2
2270    o cleanup verification/*/code/GMREDI_OPTIONS.h
2271    o cleanup testreport
2272    
2273    checkpoint51o_post
2274    o bringing AD-related verif's up to date with genmake2
2275      - carbon/
2276      - global_ocean.90x40x15/
2277      - hs.94.1x64x5/
2278      - (front_relax/ )
2279    o (more) consistent directory structure for AD-related verif.'s
2280    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2281    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2282    o bug fix in find_alpha.F for MDJWF:
2283      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2284        change rho -> rho-rhoConst
2285      - replace call find_rho to find_rhonum
2286    o initialisation of rFlx extended to full array (required by TAF)
2287      and shifted to thermodynamics
2288    o removed PTRACERS.h in ptracers routine
2289    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2290    o Correcting initialisations for fVerU, fVerV.
2291    o helping TAF to recognize dependency on kUp for
2292      fVerU, fVerV
2293    o Replacing delZ by delR in pkg/ctrl/
2294    checkpoint51o_pre
2295    
2296    o undid all of cp51 pending some cleanups and discussion
2297    o added the [#include "AD_CONFIG.h"] statement to all files that need
2298       it for adjoint/tl #defines
2299     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2300     o removed tools/genmake since it no longer works
2301    
2302    checkpoint51n_post
2303    o modifications to make FREEZE flux visible to pkg/kpp
2304      - moved surfaceTendencyTice from pkg/seaice to main code
2305      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2306      - subroutine FREEZE now limits only surface temperature
2307        (this means new output.txt for global_ocean.90x40x15,
2308         global_ocean.cs32x15, and global_with_exf)
2309    o added surface flux output variables to TIMEAVE_STATVARS
2310    
2311    checkpoint51n_pre
2312    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2313    o added [#include "AD_CONFIG.h"] to all files that use the following
2314      defines:
2315      - ALLOW_ADJOINT_RUN
2316      - ALLOW_TANGENTLINEAR_RUN
2317      - ALLOW_ECCO_OPTIMIZATION
2318    
2319    checkpoint51m_post
2320    o incorporating changes to get TAMC/TAF working in genmake2
2321      - added new TAMC/TAF targets to the Makefile
2322      - various cleanups related to package handling
2323      - these changes should have no impact on the forward model
2324    
2325    checkpoint51l_post
2326    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2327     - faster algorithm for cal_addtime.F
2328     - higher precision arithmetic, where needed
2329     - pkg/exf *startdate variables changed from calendar date to
2330       model integration time
2331    
2332    checkpoint51l_pre
2333    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2334    o enable to apply restoring on S & T only in a latitude band.
2335    o update output (external_forcing_surf modif. change truncation errors)
2336       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2337    
2338    checkpoint51k_post
2339    o change default to: useNHMTerms=.FALSE.
2340     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2341       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2342     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2343        exp1, ideal_2D_oce
2344     - change data file of oceanic exp (leave the results unchanged for now)
2345       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2346    o set gravitySign automatically according to the vertical coordinate used
2347      (and change sign: back to "logical" value: +1 when R increases downward)
2348    o added an include barrier to the default CPP_OPTIONS.h and
2349      removed the #include "PACKAGES_CONFIG.h" from it
2350    o fix a bug in mom_fluxform (from chk51j_post)
2351    
2352    checkpoint51j_post
2353    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2354    o adjusted some flow directives (dynamics, thermodynamics)
2355    o added cubed-sphere case to test cost function
2356    o heckpoint_lev?_directives.h now include
2357      pkg-specific directives, whenever those are enabled.
2358    o Moving pkg-specific flow directives to corresponding pkg
2359      Moving pkg-specific differentiation list to corresponding pkg
2360      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2361      ---> conventions are
2362           - pkg_ad.flow
2363           - pkg_ad_diff.list
2364           - pkg_ad_check_lev?_dir.h
2365    
2366    checkpoint51i_post
2367    o merge of the branch-genmake2
2368      - knowingly breaks the older genmake
2369      - automatic generation of all ALLOW_${PKG_NAME} defines
2370      - new testreport supersedes older testscript
2371    o large number of package inclusion and header cleanups
2372    checkpoint51i_pre
2373    
2374    o new output for adjoin of global ocean vector invariant
2375    o fix for checkpoint of thermodynamic seaice and bulk_force
2376    o Steph gchem various cleanups
2377    
2378    checkpoint 51h_pre
2379    o fixed some single quotes
2380    o modify gchem pkg to be more versatile
2381    o modifications to clean up dic pkg
2382    o add pkg/cfc
2383    
2384    checkpoint51g_post
2385    o provide links for ARPACK and ADM*TLM
2386    o start removing verification/vero/
2387    o update AD-related stuff
2388      (in particular some IF-statements in model/src/ routines)
2389    o adding to verification/global_ocean.90x40x15/ adjoint of
2390      vector invariant setup
2391    
2392    checkpoint51f_post
2393    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2394    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2395      of tracer Green's fucntions for ocean inversion project.
2396    
2397    checkpoint51f_pre
2398    o Added on-the-fly spatial interpolation capability
2399        "USE_EXF_INTERPOLATION" to pkg/exf.
2400      - This is a temporary Cartesian-grid hack until
2401        the super-duper ESMF coupler becomes available.
2402      - See verification/global_with_exf/README for usage example.
2403      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2404        flags and modified pkg/seaice accordingly.
2405    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2406        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2407        non-local transport term.
2408    
2409    checkpoint51e_post
2410    o pkg/mom_vecinv:
2411      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2412      - add time-ave diagnostic of vorticity advection.
2413    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2414    o atmospheric geopotential: - include water vapor effect;
2415                                - use p^kappa in p* scaling.
2416    o land pkg: read initial state from files.
2417    o AIM : add stratospheric drag in the upper level
2418    
2419    checkpoint51d_post
2420    o change function ILNBLNK (=> last non-blank char.) to return zero
2421      (instead of the string length) when the string. char is empty
2422    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2423    o modif's to restore TAMC compatibility
2424      - avoid "_d" constructs in PARAMETER declarations
2425      - avoid interrupting lines by comment lines
2426    o Use cluster local disks for purely local I/O
2427      vs. globally visible disks needed for ctrl stuff
2428      (merged from ecco-branch)
2429      - new active_file_loc... and mdsio_..._loc routines
2430      - affected packages: autodiff, ctrl, grdchk, mdsio
2431    
2432    checkpoint51c_post
2433    o introducing integer flag debugLevel
2434      - debLevZero: suppress all output
2435      - debLevA: standard
2436      - debLevB: equivalent to current debugMode=.TRUE.
2437    o introducing pathname variable mdsioLocalDir for mdsio
2438      that can be specified at runtime
2439      (relevant for cluster I/O to local disk)
2440    `
2441    >>>checkpoint51b_post
2442    adjoint of ptracers
2443    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2444    o extended state in checkpoint_lev?, etc.
2445    o alternative ctrl/cost with tr1 or ptracer
2446    o new comlev1_bibj_ptracers
2447    o new ptracers.flow
2448    o made ptracers_forcing same as external_forcing_s
2449    o added verification for adjoint with ptracers
2450      - adm. grdchk fail so far
2451      - tlm. grdchk OK
2452      - checked tapelev/comlev recomputations: OK
2453    <<<checkpoint51b_pre
2454    
2455    checkpoint51a_post
2456    o added code for biogeochemistry package
2457      - new pkgs: dic, gchem
2458      - new subroutine in ptracers
2459    o modify code for biogeo packages
2460      - in model/src and pkg/ptracers
2461    
2462    checkpoint51
2463    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2464      - autodiff, ctrl, exf, grdchk, seaice
2465      kept separate packages
2466      - cost, ecco, obcs
2467    o updating verification/internal_wave, verification/lab_sea
2468      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2469    
2470    checkpoint50i_post
2471    o Preparing next differentiable checkpoint and sync
2472      of MAIN vs. ecco-branch
2473      - 1st step: this one is differentiable
2474      - 2nd step: next(! not this) checkpoint will have updated packages
2475                  from ecco-branch)
2476    
2477    checkpoint50h_post
2478    o new package "land": provide surface BC for AIM.
2479    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2480    o AIM: use true log-P extrapolation for near surface temp (= as in
2481        F.Molteni paper) ; update aim.5l_cs output.
2482    o New variable in PARM03 for more flexible pickups
2483    o somewhat cleaned package initialisation sequence for
2484      ctrl/ cost/ ecco/ in packages_... routines
2485    
2486    checkpoint50g_post
2487    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2488      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2489      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2490        made the default because of faster convergence than ADI
2491    
2492    checkpoint50f_post
2493    o exf totally restructured
2494      - replaced all exf_set_ routines by one generic exf_set_gen.F
2495        and made sure it's still differentiable
2496      - split exf_getffields.F into new exf_bulkformulae.F
2497      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2498      - updated adjoint/makefile and relevant verif. accordingly
2499    
2500    checkpoint50f_pre
2501     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2502          + change Evap over land. (update aim.5l_cs output)
2503     o added missing .cvsignores and made uniform across expts
2504     o changed configuration of tidal_basin_2d expt
2505     o added pkg/debug functions for tracing code in fatal crashes
2506     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2507     o new fn in pkg/monitor to stop model if solution grows too big
2508     o removed lots of single quotes from comments
2509    
2510    checkpoint50e_post
2511    o make KPP work with PTRACERS
2512     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2513       nearly a copy of kpp_transport_s
2514     - there is no analogue to SurfaceTendencyS, so I have to use
2515       gPtr(of the surface layer) instead
2516    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2517    checkpoint50e_pre
2518    
2519    checkpoint50d_post
2520    o change kpp output from multiple-record state files to single-record state
2521      files analogous to write_state.F
2522    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2523      analogous to the cg2d-related output.
2524    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2525      so that writing to internal file fn (with length 512) fails.
2526    checkpoint50d_pre
2527    
2528    checkpoint50c_post
2529    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2530    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2531    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2532    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2533    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2534    
2535    checkpoint50c_pre
2536    Merging from release1_p13:
2537    o bug fix for pkg/seaice dynamic solver
2538    o Added SEAICE_initialHEFF to pkg/seaice
2539    
2540    checkpoint50b_post
2541    o store u*,v* in gU,V instead of in guNm1,gvNm1
2542    o in order to put the momForcing out of the Adams-Bashforth:
2543      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2544      to timestep.F
2545    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2546    o re-generate output for highly sensitive test-exp:
2547       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2548    
2549    checkpoint50b_pre
2550    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2551    o corrected CPP option mismatch in exf_Bulk... functions for case
2552      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2553    
2554    checkpoint50a_post
2555    o Bug fix for merging between c50 and KPP.
2556      ikey was passed from thermodynamics to kpp_calc via
2557      common block rather than being recomputed in kpp_calc,
2558      in contradiction with new key itdkey.
2559      New key ikppkey created, and tamc.h headers updated.
2560    
2561    checkpoint50
2562    - 2nd step of merge with ecco-branch:
2563      merge changes in ecco-branch back into main trunk
2564    - bug fix in find_alpha
2565    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2566    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2567    - merged some sliced AD support routines
2568    
2569    checkpoint49
2570    merged from ecco-branch:
2571    o exf:
2572      - Enable initialisation of forcing fields to constant
2573        (runtime) values.
2574      - in exf_getffields.F
2575        Reduce i-/j-loop to interior domain, discarding overlaps.
2576        That also fixes wrong TAF-key computations for key_1, key_2
2577        with bulf formulae.
2578      - exf_init.F modify #ifdef for exf_init_evap
2579      - exf_getffieldrec.F, ctrl_getrec.F
2580        The following INT-usages are not safe:
2581          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2582          fldcount = int(fldsecs/fldperiod) + 1
2583        and were modified.
2584    o autodiff: checkpoint_lev...
2585      - updated storing for bulk formulae (some arrays were missing)
2586      - added state for seaice package
2587      - synchronized with main branch
2588    o DIVA:
2589      Modif.s in
2590      - the_main_loop.F
2591      - the_model_main.F
2592      and added cost_final_restore.F cost_final_store.F
2593      o With these changes, it is possible to fully separate
2594        the first forward run to compute the cost function (mdthe_main_loop)
2595        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2596        into separate model executions.
2597        This enables better tuning of DIVA to given queue sizes.
2598      o Loss of cost function value in consecutive DIVA runs is
2599        fixed by storing to 'costfinal' file.
2600      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2601        beginning/end of adjoint integration is accounted for.
2602      The current changes apply to TAF-1.4.26.
2603      TAF has one remaining bug, requiring one manual change
2604      (see MITgcm manual).
2605    o cal: synchronized between MAIN and ecco-branch
2606    
2607    checkpoint48i_post
2608    o Changes to restore differentiability of code w.r.t. previous tag
2609      (mostly adding new routines to make list and replacing
2610      pressure by totPhiHyd).
2611    o Updated and merged grdchk package
2612      - has both ADM and TLM checks
2613      - works for single- and multi-proc.
2614      - output cleaned
2615      - worked successfully for parallel DIVA
2616    o genmake:
2617      - Adding -platform=SP4
2618      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2619    o Modif. for DIVA:
2620      ctrl_unpack should not be called in intermediate DIVA interval.
2621      (similar thing would apply for active files such as
2622      tbar, sbar, psbar, which should not be reinitialised;
2623      only relevant for ecco-branch)
2624    
2625    checkpoint48h_post
2626    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2627    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2628    o Added SEAICE_initialHEFF to pkg/seaice
2629    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2630    
2631    checkpoint48g_post
2632    --- EOS:
2633    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2634      store total Potential in totPhyHyd for diagnostics & EOS.
2635    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2636    --- Pressure/geopotential gradient:
2637    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2638    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2639      ( changes results of global_ocean_pressure )
2640    o NLFS + z-coord.: add eta*Rho' contribution.
2641    o accurate phiHyd when using interface-W at the middle between 2 centers
2642     ( changes results of ideal_2D_oce )
2643    o includes r* 2nd term in potential gradient.
2644    
2645    checkpoint48f_post
2646    Merging from release1_p12:
2647    o Modifications for using pkg/exf with pkg/seaice
2648      - improved description of the various forcing configurations
2649      - added basic radiation bulk formulae to pkg/exf
2650      - units/sign fix for evap computation in exf_getffields.F
2651      - updated verification/global_with_exf/results/output.txt
2652    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2653      (SBO) core products, including oceanic mass, center-of-mass,
2654      angular, and bottom pressure (see pkg/sbo/README.sbo).
2655    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2656      to avoid negative values in shallow regions.
2657      - updated verification/natl_box/results/output.txt
2658      - updated verification/lab_sea/results/output.txt
2659    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2660    o Added useSingleCpuIO option (see PARAMS.h).
2661    o Updated useSingleCpuIO option in mdsio_writefield.F to
2662      work with multi-field files, e.g., for single-file pickup.
2663    o pkg/seaice:
2664      - bug fix in growth.F: QNET for no shortwave case
2665      - added HeffFile for specifying initial sea-ice thickness
2666      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2667    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2668      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2669    o pkg/seaice:
2670      - adjoint-friendly modifications
2671      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2672    
2673    checkpoint48e_post
2674    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2675    o dynamics: change definition of computational domain & adapt mom_fluxform
2676      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2677    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2678        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2679        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2680        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2681        inverted_barometer solid-body.cs-32x32x1
2682      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2683    
2684    checkpoint48d_post
2685    o in preparation for r*:
2686     a) use pre-computed gradient of hydrostatic potential:
2687        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2688     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2689        => affects results of glob_oce_pressure (different truncation error)  
2690      update output.txt of ideal_2D_oce & global_ocean_pressure
2691    
2692    checkpoint48d_pre
2693    o in preparation for r*:
2694      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2695      pass the 2 comp. of the grad. as arguments to momentum S/R.
2696      but for the moment, only used if it does not change the results.
2697    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2698    
2699    checkpoint48c_post
2700    Modifications in treatment of initial flux forcing controls
2701    to avoid extra storing of flux fields.
2702    
2703    checkpoint48c_pre
2704    o Added tidal_basin_2d experiment (currently 1D!)
2705    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2706    
2707    checkpoint48b_post
2708    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2709     (modification to pressure gradient not yet implemented)
2710    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2711      (for U & V) that are used for vertical advection of momentum.
2712    
2713    checkpoint48a_post
2714    o In preparation for r*, use temp. array to compute vertical transport
2715       in flux-form momentum pkg. => change results of few test-exp.
2716      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2717                        lab_sea, natl_box & plume_on_slope
2718    
2719    checkpoint48
2720    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2721    
2722    checkpoint47j_post
2723    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2724    o moved adexch from forward_step to addummy_in_stepping
2725    o added exch in ctrl_map_...
2726    o aveFreq.=0. at end of cost_final to avoid overwrite in
2727      reverse checkpointing loop
2728    o Yet more changes in gmredi:
2729      * adgmredi_calc_tensor
2730        avoiding all recomputation of gmredi_slope_limit
2731      * adgmredi_x/y/rtransport
2732        added flag for excessive storing to avoid recomp. of
2733        u/v/rtans, dTdx/y/z
2734        -> this is not really necessary and very memory-consuming
2735      * adgmredi_slope_psi:
2736        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2737      * gmredi_slope_limit
2738        re-activated full calculation of taperfct for case 'ac02'
2739    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2740    
2741    checkpoint47i_post
2742    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2743    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2744      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2745    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2746    o gmredi: fix few bugs.
2747    
2748    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2749    This will be a good checkpoint to plug into the ecco-branch.
2750    o few modif.'s to get latest version adjointed
2751      (mainly kick out code in ini_linear_phisurf)
2752    o modif's to run adjoint with exactConserv
2753    o case GM_BOLUS_ADVEC should be cleaned
2754      S/R gmredi_slope_psi should be cleaned
2755    o verification/carbon now has exactConserv=.TRUE.
2756    
2757    checkpoint47g_post
2758    o time-average AIM output: becomes independent from statvars time-average
2759      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2760    o After TAF bug fix:
2761      Tested adjoint of gmredi package.
2762      Tests were done with checkpoint47 rather than with latest
2763      checkpoint47f_post since the latter is broken for the adjoint
2764      verification/carbon/ contains both ADM and TLM gradient checks.
2765    Here they are, before they get changed/lost/stolen.
2766    Mostly modif.'s to fix numerical sensitivities.
2767    Gradient checks OK for
2768    - GM_taper_scheme:
2769      * clipping
2770      * ac02
2771      * linear
2772      * glw91
2773      * dm95
2774      * ldd97
2775    - GMREDI_OPTIONS:
2776      * GM_VISBECK_VARIABLE_K
2777      * GM_NON_UNITY_DIAGONAL
2778      * GM_EXTRA_DIAGONAL
2779      * GM_BOLUS_ADVEC
2780    in conjunction with data.gmredi parameters to be checked in
2781    in a few minutes under verification/carbon/code/
2782    
2783    checkpoint47f_post
2784    Merging from release1_p10:
2785    o modifications for using pkg/exf with pkg/seaice
2786      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2787        and SEAICE_EXTERNAL_FLUXES
2788      - pkg/exf CPP options EXF_READ_EVAP and
2789        EXF_NO_BULK_COMPUTATIONS
2790      - usage examples are Experiments 8 and 9 in
2791        verification/lab_sea/README
2792      - verification/lab_sea default experiment now uses
2793        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2794    
2795    checkpoint47e_post
2796    o created a tag prior to creating a branch
2797    
2798    checkpoint47d_post
2799    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2800      at the bottom boundary had an erroneous half slip boundary condition
2801    o added bottom drag and no slip boundary condition capabilities to
2802      oceanic pressure coordinates code
2803    o added new verification experiment global_ocean_pressure, this experiment is
2804      also described in the tutorial section of the manual
2805    checkpoint47d_pre
2806    
2807    checkpoint47c_post
2808    o Added a verification experiment for a global cubed-sphere ocean run
2809      -  verification/global_ocean.cubed32x32x30
2810      -  uses pkg/therm_seaice and pkg/bulk_forcing
2811    
2812    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2813    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2814      when using P-coordinate; only implemented for atmospheric config.
2815    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2816      NOTES: requires option NONLIN_FRSURF to be "#define".
2817    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2818    
2819    checkpoint47b_post
2820    Merging from release1_p9:
2821    o pkg/seaice
2822      - removed GOTO's and added taf directives
2823      - double precision constants to reduce the g77 (Linux)
2824        to F77 (SGI) differences reported in release1_p8
2825    o tools/genmake
2826      - added SGI options
2827    o verification/testscript
2828      - updated to that of checkpoint47a_post
2829    o verification/global_ocean.90x40x15/input/eedata
2830      - modified for SGI f77 compatibility
2831    o verification/lab_sea
2832      - added description of sea-ice model
2833      - added missing matlab routines
2834      - added test of thermodynamics parallelization
2835    
2836    checkpoint47a_post
2837    o new pkg: aim_v23
2838     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2839       for now, keep the same surface forcing as before.
2840     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2841     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2842     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2843    o add diagnostic of surface correction term in monitor output
2844    
2845    o bulk_force and therm_seaice
2846    - Two packages:  bulk_force (Bulk forcing)
2847      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2848    - Earlier integration from Stephaine Dutkiewicz
2849      and Patrick Heimbach.
2850    - Two ifdef statements for compile time,
2851       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2852    
2853    checkpoint47
2854    differentiable version of checkpoint46n_post
2855    o bug fix in quasihydrostaticterms
2856    o * "clean" adjoint code (in terms of extensive recomputations)
2857        can now be obtained for all GMREDI options (i.e. for
2858        - GM_VISBECK_VARIABLE_K
2859        - GM_NON_UNITY_DIAGONAL
2860        - GM_EXTRA_DIAGONAL
2861        - GM_BOLUS_ADVEC )
2862      * However, wrong gradient check problem remains unsolved.
2863      * New CPP options have been introduced for different
2864        tapering schemes
2865    o external_fields_load now part of differentiation list
2866    o pressure needs multiple storing;
2867      would be nice to have store_pressure at beginning or
2868      end of forward_step, e.g. by having phiHyd global (5-dim.)
2869      (NB: pressure is needed for certain cases in find_rho,
2870      which is also invoked through convective_adjustment).
2871    o recomputations in find_rho for cases
2872     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2873    o #define ATMOSPHERIC_LOADING should be differentiable
2874    o ini_forcing shifted to begining of initialise_varia
2875    o Incorporating QNVS line search routines into MITgcm
2876      (this is separate code, and therefore not under pkg)
2877      lsopt/, optim/
2878    o Updated verification/carbon/
2879      - #define GM_VISBECK_VARIABLE_K
2880      - GM_taper_scheme    = 'ldd97'    
2881    
2882    checkpoint46n_post
2883    Merging from release1_p8:
2884    o verification/natl_box:
2885      updating new external_fields_load routine
2886    o New package: pkg/seaice
2887      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2888      The sea-ice code is based on Hibler (1979-1980).
2889      Two sea-ice dynamic solvers, ADI and LSR, are included.
2890      In addition to computing prognostic sea-ice variables and diagnosing
2891      the forcing/external data fields that drive the ocean model,
2892      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2893      The implied surface heat flux is then stored in variable
2894      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2895      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2896      non-local transport term.  Because this call precedes model
2897      thermodynamics, temperature under sea-ice may not be "exactly" at
2898      the freezing point by the time theta is dumped or time-averaged.
2899      N.B.: fairly large differences in accuracy occur across
2900            different platforms/compilers; comparison between
2901            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2902            generated output gives:
2903       T           S           U           V
2904      C D M    c        m  s        m  s        m  s        m  s
2905      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2906      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2907      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2908    
2909      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2910    o GAD:
2911      - generated new common blocks to account for call of
2912        same gad routines with differing traceridentities
2913        (needed to modify tracerIdentity indices in GAD.h)
2914      - generated separate common blocks for case useCubedSphereExchange
2915        (Department of Futurology)
2916      - parameter lists to gmredi_?transport: added tracerIdentity
2917      - added new key indices to tamc.h
2918    o external_fields_load:
2919      - added this routine to TAF list
2920      - needed to make some common blocks global and additional storing
2921        along the same lines as exf package (checkpoint_lev?_directives.h)
2922    o exf:
2923      updated external forcing package
2924      - bug fixes carried over from ecco-branch
2925        (missing OBCS_OPTIONS.h in two routines)
2926      - enable easy to use "no forcing".
2927      - added exf I/O for atmospheric loading
2928      - added exf I/O for runoff data
2929      - transfered scaling between exf <-> MITgcm to exf namelist
2930    o Adding new verification experiment global_with_exf.
2931      This verification experiment is almost identical to the
2932      global_ocean.90x40x15 experiment, except that it uses
2933      the exf (and cal) package instead of the
2934      external_fields_load routine (cf README file).
2935    
2936    checkpoint46m_post
2937    o modified testscript to return -- when there are no lines of "%MON" output
2938    o added new flag "quasiHydrostatic" for QH mode
2939      and new routine quasihydrostaticterms()
2940    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2941      New routine: mom_u_coriolis_nh()
2942    o fixed sign of non-hydrostatic metric terms in u and v equations.
2943      Depend on correct sign of gravitySign.
2944    o added work.pc* to .cvsignore in aim directories using ifc
2945    o introduced flag for controllin non-hydrostatic metric terms
2946    o removed gravitySign from PARM04
2947    o switched to g77/ifc from pgf77 in aim experiments
2948    
2949    checkpoint46l_post
2950    o made convective adjustment work with pressure coordinates:
2951     - changed the direction of k-loop in convective_adjustment.F for the
2952       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2953     - adjusted the reference pressure k-index in convective_adjustment.F
2954     - adjusted the convection condition in convect.F (in analogy to
2955       calc_ivdc.F)
2956     - convective_adjustment no longer computes anything on the halos
2957     - removed the warnings about negative salinity from find_rho.F and
2958       find_alpha.F; instead the new routine look_for_neg_salinity, called
2959       at the beginning of find_rho, find_alpha, and find_beta, does a
2960       check of the entire slice, if CPP-option
2961       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2962    checkpoint46l_pre
2963    
2964    checkpoint46k_post
2965    o fixed the verification/global_ocean.90x40x15 experiment:
2966     - new bathymetry (the world according to A., JMC, and M.)
2967     - new initial fields and forcing fields (*.bin files)
2968     - new POLY3.COEFFS (for the next release one should switch to a full
2969       equation of state: JMD95P or MDJWF)
2970     - fixed several errors and redundancies in the data file
2971     - experiment uses looped cells
2972     - added matlab directory with diagnostic scripts for plotting of output
2973    
2974    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2975     - read AIM physics parameters from a file (data.aimphys)
2976     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2977    
2978    checkpoint46j_post
2979    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2980    o move wVel computation at the end of the time step, in S/R integr_continuity
2981    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2982    o update timeave pkg for wVel diagnostic.
2983    checkpoint46j_pre
2984    
2985    checkpoint46i_post
2986    o Clean up AIM package (and keep the results unchanged):
2987      include CPP_OPTION and use IMPLICT NONE in all routines ;
2988      declare all the variables _RL ; use _d 0 for all numerical constants.
2989      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2990    
2991    checkpoint46h_post
2992    o cleaned up the use of rhoNil and rhoConst.
2993      - rhoNil should only appear in the LINEAR equation of state, everywhere
2994        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2995        and the dynamical equations are all divided by rhoConst
2996    o introduced new parameter rhoConstFresh, a reference density of fresh
2997      water, to remove the fresh water flux's dependence on rhoNil. The default
2998      value is 999.8 kg/m^3
2999    o cleanup up external_forcing.F and external_forcing_surf.F
3000      - can now be used by both OCEANIC and OCEANICP
3001    checkpoint46h_pre
3002    
3003     Added code to convert surface volume flux (fresh water) into
3004     a mass flux when using P coordinates in the ocean (OCEANICP).
3005     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3006    
3007    checkpoint46g_post
3008    o Include a new diagnostic variable phiHydLow for the ocean model
3009      - in z-coordinates, it is the bottom pressure anomaly
3010      - in p-coordinates, it is the sea surface elevation
3011      - in both cases, these variable have global drift, reflecting the mass
3012        drift in z-coordinates and the volume drift in p-coordinates
3013      - included time averaging for phiHydLow, be aware of the drift!
3014    o depth-dependent computation of Bo_surf for pressure coordinates
3015      in the ocean (buoyancyRelation='OCEANICP')
3016      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3017        Theta, Salinity, and Pressure in the parameter list. This routine is
3018        presently contained in find_rho.F. This routine does not give the
3019        correct density for 'POLY3', which would be a z-dependent reference
3020        density.
3021    o cleaned up find_rho
3022      - removed obsolete 'eqn' from the parameter list.
3023    o added two new verification experiments: gop and goz
3024      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
3025    checkpoint46g_pre
3026    
3027    checkpoint46f_post
3028    o Enable tangent linear (forward mode) gradient checks:
3029      - extended active file handling to g_... files
3030      - added TANGENT_SIMULATION to theSimulationMode
3031      - extended grdchk package accordingly
3032    o added tangent linear setup in verification/carbon/code_ftl
3033    o added adjoint setup in verification/front_relax/code_ad
3034    
3035    checkpoint46e_post
3036    o Added new equation of state -> MDJWF
3037      - EOS of McDougall et al., 2002, JAOT, submitted
3038      - caveat: the equation of state is only valid for a smaller (more
3039        realistic?) range of values than JMD95P/Z and UNESCO
3040      - added masks to the calculation of pressure in store_pressure
3041      - added more check values for density in check_eos (ini_eos.F), some of
3042        the old check values are out of the range of the MDJWF-eos, so don't
3043        expect perfect matches for those
3044    checkpoint46e_pre
3045    
3046  checkpoint46d_post  checkpoint46d_post
3047  o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and  o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
3048    'OCEANICP', also initialised field pressure correctly in ini_eos in the    'OCEANICP', also initialised field pressure correctly in ini_eos in the
# Line 26  checkpoint46c_pre Line 3066  checkpoint46c_pre
3066    
3067  checkpoint46b_post  checkpoint46b_post
3068  o Added new equation of state -> JMD95Z and JMD95P  o Added new equation of state -> JMD95Z and JMD95P
3069    - EOS of Jackett and McDougall, 1995, JPO    - EOS of Jackett and McDougall, 1995, JAOT
3070    - moved all EOS parameters into EOS.h    - moved all EOS parameters into EOS.h
3071    - new routines ini_eos.F, store_pressure.F    - new routines ini_eos.F, store_pressure.F
3072  o Added UNESCO EOS, but not recommended because it requires  o Added UNESCO EOS, but not recommended because it requires

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