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revision 1.14 by cnh, Tue Sep 29 18:57:53 1998 UTC revision 1.833 by mlosch, Thu Jun 7 14:02:06 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/seaice:
8     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
9       requires a new routine: seaice_diagnostics_fill.F
10     - make sure that seaice does not move if not forced (pressure replacement
11       method, Hibler and Ip, 1995), changes results
12     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
13     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
14       It is turned off by default (=-1.), because it changes the results.
15     - make it possible to read AREA from a file, too.
16    
17    checkpoint59c
18    o add S/R and diagnostics for oceanic mixed-layer depth
19    o move GMRedi call after all vertical mixing schemes (including KPP)
20    o pkg/thsice:
21     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
22      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
23    o pkg/obcs:
24     - bug fix for balance code
25    o pkg/seaice:
26      - allow values of SEAICE_elasticParm > 1
27      - add new parameter SEAICE_evpTauRelax as an alternative
28        to SEAICE_elasticParm
29      - make lsr boundary conditions free slip (by default), changes result
30      - add code for no slip boundary conditions for lsr
31      - set minimum of zeta to zero (and not 4e8) (changes results)
32      - add a cap on AREA after advecting AREA if seaice_growth is not called
33    o change calculation of Visbeck K:
34      - no longer depend on tapering scheme; instead, compute slope (limited
35        by GM_maxSlope). this is equivalent to what was comuted before with
36        clipping or linear tappering.
37      - fix vertical averaging (wrong by 1/2 level)
38      - leave the old version (but will not be maintained) within
39        #ifdef OLD_VISBECK_CALC / #endif
40      - update output of exp. ideal_2D_oce
41    o change error catch in calc_r_star to improve vectorization
42    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
43      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
44    o adjoint:
45      Re-organized adjoint checkpointing according to Matt Mazloff
46      (but with modifs/completions/cleanups)
47      Storing is now bundled into large arrays to optimized I/O
48      (and second step in cleanup of the_main_loop)
49    
50    checkpoint59b
51    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
52      - export/import (between ocean & coupler) fields needed for ocean DIC.
53    o pkg/seaice:
54      - get rid of three more exchanges seaice_calc_viscosities (required
55        different loop boundaries in seaice_lsr and seaice_ocean_stress)
56      - bug fix in seaice_ocean_stress (update of lab_sea required)
57      - reduce loop boundaries to necessary minimum also in seaice_evp
58      - go back to the old way of computing deltaC/Z as the adjoint likes that
59        better
60    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
61      passive tracer to an Age Tracer) + update output.txt
62    o pkg/exf:
63      - implement A-grid / C-grid selection for wind-stress input files.
64      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
65      for now, in exf_bulk_largeyeager04.F only :
66      - change implementation for case where windspeed + 2. components wind-stress
67        are read-in. AND use rhoConstFresh to convert evap.
68    o pkg/seaice:
69      - use correct EXCH_UV for wind-forcing (on A-grid).
70      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
71        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
72    o pkg/exf:
73      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
74      EXF_INTERPOLATION:
75      - merge global_with_exf/code version of exf_interp_read.F
76        to the main code ;
77      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
78        reading the file ; Important: This options needs to be defined to recover
79        previous code.
80        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
81      - no longer loose real*8 precision along the way when using exf_iprec=64.
82    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
83      - change discretisation of evp-solver in order to avoid another exchange
84        (changes lab_sea) and clean up a little
85      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
86        help the adjoint (this also changes the results slightly)
87      - add a few "_d 0" where they had been missing in seaice_evp.F
88      - cleaning up: remove unused seaice_calc_rhs.F
89    o pkg/exf: some cleaning-up:
90      - change various "constants" into runtime parameters
91      - cleaned-up Large&Yeager04 routine which should eventually
92        replace exf_bulkformulae.F (changed names of S/R and CPP)
93        and merged various ALLOW_ATM_WIND options
94     only used with thsice pkg (in thsice_get_exf.F):
95      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
96        which are used when useStabilityFct_overIce=TRUE (= the default)
97      - change default values of ice & snow emissivity and scale downward LW
98        by ice & snow emissivity.
99    o pkg/thsice:
100     fix few little problems, in thsice_calc_thickn.F:
101      - growth vertically (and not laterally) if iceFrac == iceMaskMax
102      - melt only laterally if hIce < hThinIce (as the comments say)
103      and in thsice_extend.F:
104      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
105      - start to form ice as soon as the minimum ice-volume is reachable.
106     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
107      and cpl_aim+ocn
108    o pkg/kpp
109     - move computation of surface related input fields to KPP into a new
110       subroutine kpp_forcing_surf.F
111     - remove wrong (within bi,bj loops) EXCH calls.
112     - little cleaning (add argument myThid in last position, cvs header ...)
113     - for now, fix conservation problem by exchanging KPPviscAz (may not
114       be the best fix)
115    o pkg/seaice
116     - check for inconsistent evp parameter/cpp-flag combination
117     - remove leftover errIO flat for obsolete name list error handling
118    o OpenAD
119     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
120    
121    checkpoint59a
122    o pkg/seaice: some parameter clarifications and a little bit of clean up
123    o pkg/thsice: rename run-time parameters:
124       himin       -> hIceMin
125       himin0      -> hThinIce
126       hihig       -> hThickIce
127       i0          -> i0swFrac
128       transCoef   -> bMeltCoef
129       frac_energy -> fracMelting
130      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
131       with default values (for now) that do not change the results.
132      remove old version of thsice vars advection in pkg/seaice.
133    o in FFIELDS.h:
134      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
135      - make pLoad & sIceLoad always available (but still only used if
136         ATMOSPHERIC_LOADING is #define).
137    o pkg/kpp: replaced _KPP_RL with _RL
138    o bug fixes for vertical diffusivity computations when both KPP and
139        3D diffusivity arrays are used.
140    o pkg/seaice: fix bug in evp solver, while doing that
141      - change (improve?) discretization of stress computations for both
142        cgrid-lsr and evp solver
143      - add a new routine to compute strain rates
144      - the above changes lab_sea results
145      - add no slip conditions for evp solver (off by default), lsr-version
146        may follow
147      - fix exchange for shear at Z-points (does not change lab_sea)
148      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
149        (to force the user to pick a time step since there is not "safe" way
150        of choosing it)
151      - add principal stress diagnostics
152      - rearrange fields for evp a little to avoid having to call a: too many
153        exchanges and b: exchanges for stress trensor components which we do
154        not have.
155      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
156        of evp, complete rewrite for lsr case (latter is does not yet work
157        in all cases)
158    o pkg/kpp: add code to have mixing in shelf ice caverns
159      - add myThid to all kpp routines (long overdue)
160    
161    checkpoint59
162    o pkg/exf:
163      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
164        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
165      - move exf header files from lower_case.h to UPPER_CASE.h ;
166        add missing cvs Header & Name
167      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
168      - add namelist param. selectStressGridPosition, exf_monFreq
169      - retire many _CLIM routines, and remove data.exf_clim
170        + params moved to data.exf
171        + climsst, climsss now handled by exf_set_gen, i.e.
172          climss?period=0 refers to constant field,
173          climss?period=-12 to monthly forcing
174      - split up namelists in data.exf
175    o pkg/seaice:
176      - remove seaice_exch and seaice_exch_uv
177      - remove superfluous exchange of theta
178      - add myThid to seaice_budget_ocean/ice
179      - add new interface for atmospheric wind forcing (C-grid only)
180        + new routine
181        + two new field (taux, tauy for stress over ice)
182        + removed one global field (DAIRN) for C-grid case only
183    o pkg/thsise
184      - 2nd set of modifs for thsice adjoint in conjunction with exf
185    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
186    
187    checkpoint58y_post
188    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
189      vertical diffusivity, similar to that in MOM4; turned on using
190      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
191      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
192    o Added capability for 3D specification of background vertical diffusion
193      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
194      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
195      "data" file that contains the 3D vertical diffusivity coefficients.
196    o ice dynamics (pkg/seaice) with thsice thermodynamics:
197      - add code within pkg thsice to advect & diffuse sea-ice fields
198      similar to (and will replace) what has been added in  seaice_advdiff.F,
199      but: - conserving Mass, Heat & Salt.
200           - better when using non-linear advection scheme (not yet fully tested)
201           - can also be used in atmospheric set-up (for now, only the diffusion).
202    
203    checkpoint58x_post
204    o IO option for global-file compact format:
205      - add options when generating topology (utils/exch2/matlab-topology-generator)
206      - add I/O capability (pkg/mdsio).
207      - adapt utils/matlab/rdmds.m to read this format.
208      for now long-line format not yet supported by pkg/mdsio (& exch2).
209    o shelfice: add a few diagnostics
210    
211    checkpoint58w_post
212    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
213      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
214      (and replace horiVertRatio in NH code).
215      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
216                         and tutorial_plume_on_slope (sensitive to truncation)
217    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
218      directly to drive seaice model (C-grid only)
219    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
220     - reintroduce computation of wind from stress,
221     - compute tau (in exf_bulkformulae.F) from windstress averaged to
222       mass points to avoid tau = 0
223     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
224    o rdmnc.m: make it work with "global" files created with gluemnc
225    o rdmnc.m : some improvements in dealing with singleton dimension
226      (tested on all testreport mnc output files).
227    o genmake2: disable pkg/profiles if netcdf test fails.
228    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
229    o move call to cal_readparms up to make calendar parameters/variable available
230      to all packages
231    
232    checkpoint58v_post
233    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
234      useDynP_inEos_Zc tested.
235    o pkg/exf: changes to properly interpolate/mask/scale initial fields
236    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
237      and portions thereof.  See read_cs.txt for description and examples.
238    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
239      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
240      following the great-circle arc between those 2 points.
241    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
242      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
243    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
244     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
245     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
246     - still needs work (not working with some options ; efficiency to improve)
247       and serious testing.
248     - use this scheme for temperature & salinity in 2 advection test exp.:
249       advect_xy & advect_xz, respectively.
250    
251    checkpoint58u_post
252    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
253    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
254    o testreport: add option "-skipdir" to skip some test.
255    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
256      momentum calculation.
257    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
258    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
259      remove checkpoint.F and the_correction_step.F (no longer used);
260      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
261    o add option (linFSConserveTr) to correct for tracer source/sink due to
262      Linear Free surface
263    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
264    o pkg/thsice: fix reading mnc-pickups
265    
266    checkpoint58t_post
267    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
268    o pkg/mdsio:
269     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
270       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
271       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
272     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
273     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
274       either MDS_READ_FIELD or MDS_WRITE_FIELD )
275     - new S/R (to replace MDSWRITEMETA), which allows to write more
276       informations (variable names, time ...) to meta files.
277     - modify rdmds.m to give back the meta file content.
278    o pkg/diagnostics: change vertical interpolation to be safer, and more
279       flexible (define p-levels to interpolate to in data.diagnostics);
280      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
281       diagnostic pointer.
282    o pkg/seaice: more cleaning up of seaice_growth, added many comments
283    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
284    o fix multi-category seaice:
285     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
286       SEAICE_MULTICATEGORY
287     - fix short wave heat flux
288    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
289       and allow to use EVP solver. Change forward lab_sea: test both EVP
290       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
291    o Initial check-in of lab_sea adjoint
292      (very similar to natl_box_adjoint/code_seaice)
293      * used C-grid and EVP solver
294      * used KPP, GM/Redi
295      * uses inAdExact=.TRUE.
296      * gradient checks fail for both ADM and TLM
297        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
298        f.d. gradients actually seem more problematic than ADM, TLM gradients;
299        issue is related to forward mismatch between g77 an ifort
300    o pkg/seaice: overhaul of thermodynamics
301     - growth.F and groatb.F are replaced by new routine seaice_growth.F
302     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
303     - move a few global fields out of SEAICE.h into seaice_growth.F and
304       make them 2D (FICE/QNETO/ ...)
305     - remove FO (it is the same as QNETO)
306     - introduce a few local fields to avoid modifying external fields such
307       as atemp, etc.
308    
309    checkpoint58s_post
310    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
311      changed exf_set_gen.F so that
312        genperiod=0 means input file is one time-constant field and
313        genperiod=-12 means input file contains 12 monthly means
314    o CG2D: use pre-computed solver main-diagonal (stored in common block);
315      this affects truncation error ; generate new output file for exp. which
316      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
317        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
318        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
319        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
320        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
321        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
322    o start implementation of deep-atmosphere and anelastic formulation
323    o verification: remove 2nd copy of input files and use script "prepare_run"
324      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
325    o mom_common/vecinv/fluxform: fix a few initialisation isssues
326    o profiles: fix for multithreaded case
327    
328    o diagnostics: rename few diags:
329      s/'PRESSURE'/'RCENTER '/g
330      s/'TICE    '/'oceFreez'/g
331      s/'TAUX    '/'oceTAUX '/g
332      s/'TAUY    '/'oceTAUY '/g
333      s/'SWFLUX  '/'oceQsw  '/g
334      s/DIFx/DFxE/g
335      s/DIFy/DFyE/g
336      and add few ocean-forcing diagnostics:
337      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
338    o modifications to pkg/seaice/growth.F and budget.F, which change results of
339      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
340      as actual snow thickness.  It now refers everywhere to effective snow
341      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
342    
343    checkpoint58r_post
344    o modifications to pkg/seaice/growth.F, which change results of
345      lab_sea experiment: fixes pertain to melting snow over open water, to
346      masking EVAP under sea ice, and to using the correct AREA variable for
347      computations of EVAP, PRECIP, HSNOW, and GHEFF
348    o add ability to read bathy, salt, and theta using MNC (off by def)
349    o add flooding algorithm and advection of HSNOW for pkg/seaice;
350      both are turned off by default and do no change any results
351    o seaice advection with pkg/thsice: a step toward the use of non-linear
352      advection scheme, but #ifdef or commented out for now (requires more EXCH).
353    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
354      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
355      in natl_box (affects results @ truncation level: update output.txt)
356    o multi-threading and IO:
357      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
358      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
359        (needed to work with SingleCpuIO): tested in all verif. exp.
360    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
361      affects the results (but none of the verification test uses this scheme).
362    o Adding some pkg/diagnostics capability to pkg/seaice
363      (will certainly be subject to changes)
364    o ctrl: adding new control variables:
365      lwflux, lwdown, evap, snowprecip, apressure, runoff
366    
367    checkpoint58q_post
368    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
369      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
370      high_res_cube configuration by 4% on Columbia.
371    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
372      add (in global_with_exf/code) a version of EXF_INTERP_READ without
373      dynamical allocation (seems to work in multi-threaded).
374    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
375      single CPU io) so that TAF does not have to see EESUPPORT.h
376    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
377    
378    checkpoint58p_post
379    o obcs: stop if obcs is used with useCDscheme = .true.
380    o shelfice:
381     - fix a sign error so that no slip at shelfice interface works
382     - remove stop for combination non-hydrostatic code and shelfice. That does
383       not mean, that the results are correct, but at least they are numerically
384       stable
385    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
386    o added adjoint exch routined for all exch*3d* routines
387      and updated flow directives
388    
389    checkpoint58o_post
390    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
391      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
392    o change controling S/R for writing pickup file (new S/R do_write_pickup)
393      and clean-up reading/writing of pickup files.
394    o fix local version of read/write pickup (NH part) in rotating_tank/code
395    o simplify EXCH interface:
396     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
397     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
398    o added the regrid package
399    o shelfice:
400     - add a simple boundary layer scheme to reduce noise
401     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
402    
403    checkpoint58n_post
404    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
405       local variable (not in common block).
406    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
407      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
408      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
409        to work with SingleCpuIO.
410    o add "_d 0" to real constant of pkg/cfc subroutines ;
411       update exp. cfc_exemple & tutorial_cfc_offline output files.
412    o multi-threading and IO:
413      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
414        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
415      - barrier before and after reading.
416      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
417      - avoid using MDS_WRITELOCAL for LAND pkg output.
418      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
419        common-block variables ; Allows multi-threading with master-thread IO.
420    o change default MAX_NO_THREADS from 32 to 4 ;
421      and stop cleanly when MAX_NO_THREADS is too small.
422    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
423    
424    checkpoint58m_post
425    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
426       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
427    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
428       keep global_ocean.90x40x15 (for AD testing) with former secondary test
429       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
430    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
431        add MITgcm_tutorials (= code + all the tutorials)
432    o ecco, option to compute cost for total ssh (mean+anom)
433    o consistent with addition of ptracer and ssh in pkg/profiles
434    o profiles: adding ptracer and ssh
435    o testreport: change multi-test output-file name
436      (from output.txt.{name} to output.{name}.txt)
437    o profiles: now ok for mutli-tiles case
438    o seaice: add 4 parameters for different advection schemes for area,
439      (effective) seaice thickness, enthalphy, and snow height. Their default
440      is the standard parameter SEAICEadvScheme
441    o calc_gw:
442     - add cosFacU in zonal viscous flux (harmonic.visc.).
443     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
444       of tutorial_plume_on_slope.
445    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
446    o calc_gw: true flux-form, account for horizontal grid spacing.
447      update rotating_tank results, but not plume_on_slope (affected at
448      truncation level, 11 digits).
449    
450    checkpoint58l_post
451    o calc_gw:
452     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
453     - remove side-drag for now (need to fix it); update plume_on_slope results.
454     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
455    o commit code to make SST/SSS weights spatially variable
456      (based on either variable in-situ or variable initial T/S weights)
457    o pkg/ecco:
458      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
459        now based on horizontally varying weights wthetaLev, wsaltLev
460      * cost_averagesflags now returns year indices in addition to day, month
461      * sflux balance is performed on annual basis
462        (sflxumm, sfluxmm2, bal_sfluxmm)
463      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
464        including separate counting and multipliers
465    o pkg/rbcs
466      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
467    
468    checkpoint58k_post
469    o testreport:
470     - always build in dir. "build" (if not there, mkdir build instead of building
471       & running in input)
472     - run in dir run (if it exists), in build otherwise.
473     - call prepare_run (if input/prepare_run exists)
474     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
475    o pkg/exf modifications to interpolation and rotation routines for more
476       reasonable treatment of North Pole singularity: for tracers North Pole
477       value is set to northernmost zonal-mean value, for zonal velocity it is
478       set to zero, and for meridional velocity it is set to northernmost value.
479    o pkg/exf/exf_check_range.F
480     - add tile index to diagnostics and move stop statement to the very
481       end of the routine.
482    o pkg/diagnostics: (diagnostics_main_init.F)
483      define title of isomorphic variables according to the current config.
484    o pkg/thsice with pkg/seaice dynamics:
485    - fix domain of computation (interior only, required for exf) and do exchanges
486    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
487    o towards a standard way of dealing with multi-threading in MONITOR
488      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
489    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
490       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
491    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
492    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
493    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
494       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
495    o tracer advection:
496     - clean-up and simplify calc_common_factors.F
497     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
498       advection subroutine (but still not used within DST advection S/R)
499    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
500    
501    checkpoint58j_post
502    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
503      from file (collects calls previously in FORWARD_STEP)
504    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
505    o adjoint store dir. adjusted accordingly
506    o genmake2
507      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
508    
509    checkpoint58i_post
510    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
511      on wind stress (SEAICEstressFactor defaults to 1.)
512    o Total number of Timers is finite (<=40): comment out 2 non-essential one
513      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
514    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
515      on CS-grid: no longer loosing mass.
516    o exf & curvilinear-grid: no longer modify longitude xC & xG.
517    o pkg/ggl90: fix sloppy output and fix a bug
518    o pkg/seaice: added SEAICEuseEVPpickup parameter
519      - Set to false in order to start EVP solver with
520        non-EVP pickup files when using SEAICEuseEVP
521      - fix sign error in diffusion in seaice_calc_rhs
522    
523    checkpoint58h_post
524    * Modifications for bottom topography control
525      o replace hFacC by _hFacC at various places
526      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
527      o add non-self-adjoint cg2d_nsa
528      o update autodiff support routines
529      o re-initialise hfac after ctrl_depth_ini
530      o works for 5x5 box, doesnt work for global_ocean.90x40x15
531    * Adding verification for 5x5 box (4-layer) bottom topography control
532    
533    checkpoint58g_post
534    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
535       used for mean seasonal cycle, mean diurnal cycle); add an example
536       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
537    o pkg/ggl90:
538      - add parameter (minimum surface kinetic energy)
539      - fix bug (avoiding division by zero)
540    o couple pkg/thsice to pkg/seaice:
541      - modify advection in seaice to accomodate new scalar fields to be advected
542      - only muliDimAdection scheme work with seaice/thsice
543      - mapping of thsice-variables to seaice-variables, back and forth
544      - does not break the verification experiments, but does not give the
545        desired results either
546    o pkg/seaice
547      - make (default) second order advection a bit less confusing?
548    
549    checkpoint58f_post
550    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
551      to pkg/seaice):
552      - new routines thsice_map_exf and thsice_get_exf provide the interface
553      - add an additional formal parameter to thsice_solve4temp
554    o pkg/exf:
555      - add new fields wspeed, snowprecip (to be able to couple to thsice)
556      - correct Stefan-Boltzmann constant
557      - new parameter for longwave surface emittance
558      - separate some stuff from exf_bulkformulae into new routines  
559        exf_radiation, exf_wind
560      - add new parameters and constants: longwave emissivity for ocean, ice
561        and snow, evaporation parameters over ice
562      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
563        either wind from stress or stress from wind
564    o pkg/thSIce:
565    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
566    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
567       and THSICE_CALC_THICKN
568    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
569    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
570      to make debugging easier.
571    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
572    o pkg/bulk_force:
573      - clean-up comments and parameters ;
574      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
575    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
576      generate new output for test-experiment: aim.5l_cs.thSI
577    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
578      testreport accordingly
579    
580    checkpoint58e_post
581    o SEAICE_CGRID adjoint done
582    o R_STAR adjoint implemented.
583      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
584      * need to sort out init. of h0facc, etc.
585    o Make pkg/profile fully independent of ecco,cost, etc. stuff
586      to be able to use it in pure forward.
587    
588    checkpoint58d_post
589    o upgrade simple test-experiment to tutorial example:
590     step.1: duplicate the experiment and (step.2) will remove the old copy.
591      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
592      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
593      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
594      tutorial_global_oce_biogeo    <- copy of dic_example
595      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
596      tutorial_plume_on_slope       <- copy of plume_on_slope
597      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
598      tutorial_global_oce_optim     <- empty for now (David ?)
599      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
600     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
601    o correct a sign problem in cost_scat.F
602    o obcs and ptracers: fix boundary conditions for advections schemes
603      with larger stencil
604    o thsice adjoint: start
605    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
606      completeness
607    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
608      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
609    o ptracers adjoint:
610      * avoid extensive recomputatations
611      * fix missing re-init. of gptr (missed by TAF)
612    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
613      me to turn off the excessive output to STDOUT that this package produces
614    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
615      and add those terms in Vector-Invariant formulation.
616    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
617      if the control period (xx_hfluxperiod etc) is 0
618    o in profiles pkg, clean routines and fix details
619    o in ecco pkg, reading ssh data:
620      fix problem in case the model does not start at iter0=0
621    o fix mnc-pickup/restart for ptracers
622    o new package prifiles:
623      code to compute profile-based cost by Gael Forget
624      (modifs in ecco, ctrl, autodiff)
625    o Benign bug fix in initialization (spotted by M. Mazloff) of
626      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
627    
628    checkpoint58c_post
629    o adjoint: finish NLFS adjoint and provide reference output in
630      verification/global_ocean.90x40x15/results_ad_nlfs
631    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
632      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
633      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
634      with SEAICE_CGRID defined.
635    o move calendarDumps from "data" to "data.cal" and clean-up the code
636      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
637    o add useEXF & useCAL flags (for now, set in hard-coded way)
638    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
639      (were missing in NH mode, and wrong in quasihydrostatic mode).
640      waiting for Chris updated version of calc_gw to add those CALLs.
641    o fix bug in quasihydrostatic S/R ;
642      add a test for this option: global_ocean.90x40x15.qshyd
643    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
644      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
645    o add on/off flag useOffLine for package OFFLINE
646    o seaice:
647      - modify advection so that it works also on the C-grid
648      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
649        problem in multi-tile runs with C-grid
650      - add flags for clipping ice velocities and/or masking solver forcing
651      - fix drag (ocean on ice) formulation and a bug that caused noise in the
652        C-grid solver
653      - added a few comments to seaice_diffusion.F
654      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
655        are now exclusive)
656      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
657        required re-ordering the code a little:
658       + make DAIRN global variable (defined in SEAICE)
659       + move computation of the viscosities eta and zeta into a new separate
660         routine (because I need to recompute them in seaice_ocean_stress.F)
661    
662    checkpoint58b_post
663    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
664      update output.txt of exp. aim.5l_cs.thSI
665    o various mnc cleanups and improvements:
666      + shrink lookup tables by factor of ~4
667      + better error reporting when running out of lookup space
668      + able to handle longer path/file names (up to 500 chars)
669    o adjoint:
670      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
671      - TBD: "hidden" mom_vecinv recomp. in dynamics
672    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
673     (allow to differentiate between forcing components using new integer flags:
674      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
675     and add new flag to put Dissipation tendency out of Adams-Bashforth.
676    o ecco
677      - enable trend removal from SSH anomaly obs.
678    o adjoint
679      - a fix for PmEpR when #undef EXACT_CONSERV
680      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
681      - try to fix "hidden" recomp. in forward_step for NLFS
682        (NLFS seems broken sometimes after I checked it in)
683    o seaice:
684     - add c-grid version of the dynamic solver:
685       + three new routines that are the c-grid substitute lsr, dynsolver
686         and ostres
687       + put a few fields that were local to dynsolver into global common
688         blocks, so that I can move the computation of stresses etc into
689         seaice_lsr (saves coding but may break the adjoint).
690     - replace more hardwired parameters by runtime parameters
691     - add ice masks that mask the rhs of the implicit solvers where there
692       is no ice (commented out in seaice_dynsolver, because i am not sure
693       if this works properly), eventually this should replace the clipping
694       of ice velocities in seaice_dynsolver to +/-40cm/s.
695    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
696      include it only where its needed
697    o move balancing of fluxes before the call of external_forcing_surf
698    o seaice:
699      - correct units of turning angles (now they are really in degrees)
700      - move computation of GWATX/Y out of main routine into dynsolver
701      - initialize GWATX/Y in seaice_init
702    o Apply mask on Fresh-Water flux (needed for SSH forcing).
703      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
704    o seaice: add runtime flags for turning angles (default to zero)
705    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
706      and trend from exf forcing and ctrl control adjustments
707    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
708      (since checkpoint57x_post)
709    o change the default rotation period to 86164.s = the Earth rotation
710    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
711      and based on a reference stratification. Tested within hs94.cs-32x32x5.
712    o seaice advection: add code for choosing between the default (2nd order
713      central differences) and multiDim advection schemes provided by
714      pkg/generic_advdiff
715    o seaice:
716      - removed all references to SEAICE_GRID.h fields from
717        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
718        (cubed-sphere configuration will change a little)
719      - grid computations in seaice_init are obsolete now.
720      - cleaned up code a little so that is easier to read (hopefully).
721      - added new (better?) discretizations of default advection and diffusion
722        (turn on with SEAICEuseFluxForm)
723      - replace 1 in 3d global fields by kSurface in growth.F
724      
725    checkpoint58a_post
726    o seaice:
727      - bug fix in advect.F
728    o shelfice:
729      - separate shelfice load anomaly from pload (breaks with time
730        dependent forcing), => introduce constant field shelficeLoadAnomaly.
731        Its default is 0., but it may be computed more cleverly from (unknown)
732        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
733        done offline. A good approximation of the pressure load anomaly is
734        necessary to avoid large initial adjustment processes underneath
735        deep-reaching shelfice.
736      - small fix in ISOMIP shelfice_thermodynamics
737      - add more sophisticated thermodynamics of Hellmer (1989), this is
738        now the default
739      - give a few constants more intuitive names
740    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
741      if bulk formulae are used in long integration (especially EmPmR). Turn
742      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
743      if balancePrintMean, the imbalance that is substracted is printed to
744      STDOUT.
745    o fix bug (typo) in obcs_apply_eta.F
746    o add a new package shelfice which enables us to model the circulation
747      underneath shelf-ice with draughts of hundreds of meters.
748     - works
749     - to do: + include improved thermodynamics
750              + check whether kSurfC (from model/inc/SURFACE.h) can be used
751                instead of new field kTopC
752              + can we use topoFile, Ro_surf and existing code in ini_depth.F
753                instead of new field R_shelfIce and new code in ini_depth.F
754                and ini_mask_etc.F?
755              + adjust vertical mixing schemes?
756    o seaice pkg:
757     - add a cpp-flag to include a simple formula for a salinity dependent
758       freezing point of sea water at the surface
759     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
760       meridional stresses are now different (and hopefully correct)
761    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
762       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
763       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
764    o pkg/diagnostics: add options and parameters for regional-statistics
765       diagnostics ; define regions by reading a region-mask from a file
766       (might add other options later)
767    o pkg/bulk_force:
768     - add option and parameters to use AIM surface-flux formulae.
769     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
770       others forcing fields (defined in PARM05, parameter file "data") are loaded
771       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
772     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
773     - use the right EXCH call for uwind,vwind (to work on CS-grid).
774     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
775       and parameters (note: calcWindStress replaces .NOT.readwindstress).
776     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
777    
778    checkpoint58
779    o add "--embed-source" option to genmake2 which, when the supporting
780      tools can be compiled (as determined by genmake2) will turn on the
781      embed_files package which then embeds the entire MITgcm source code
782      (*.[fFhc] + Makefile) used for the build within the executable
783      - requested by CNH but off by default
784      - adds a paltry <9MB to the mitgcmuv executable in most cases
785      - only writes the output when useEMBEDSRC in eedata is true
786    o clean up 3-dim. relaxation codes:
787      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
788      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
789      * Thanks to Tom Haine for testing!
790    
791    checkpoint57z_post
792    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
793      affects output (@ truncation level) of exp. plume_on_slope ; updated.
794    o fix the pickup behavior for obcs in combination with ptracers
795    o fix a bug in ptracers_external_fields_load
796    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
797      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
798    o transfered surface NH pressure to eta field (if exactConserv).
799    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
800         and update lab_sea output.txt file.
801    o completing 3-dim. relaxation code: additional term
802         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
803      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
804      * At compile time, in "EXF_OPTIONS.h" set
805          #define  ALLOW_CLIMTEMP_RELAXATION
806          #define  ALLOW_CLIMSALT_RELAXATION
807      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
808          tauThetaClimRelax3Dim = 15552000.0,
809          tauSaltClimRelax3Dim  = 15552000.0,
810      * 3 cases:
811          1) Use a constant-in-time 3-dim. field
812          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
813          3) Real-time relax. to time-evolving prescribed field
814    o Adding Laplacian-type smoothness constraint on
815      initial and boundary (forcing) controls (ic, bc)
816      * enable at compile-time via
817        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
818      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
819      * Absolute scale somewhat unclear so far
820      * no area weighting was included since no other cost term does so far
821    
822    checkpoint57y_post
823    First step for a NLFS adjoint
824    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
825    o new init. routines for calc_r_star, calc_surf_dr
826    o still need to deal with ini_masks_etc
827    o testreport seemed happy
828    checkpoint57y_pre
829    
830    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
831    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
832    o add new offset feature to offline pkg (plus minor cleanup)
833    o cfc fixes for final year of integration
834    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
835      be in GCHEM_OPTIONS).
836    
837    checkpoint57x_post
838    o fix testreport Pb in multiple test experiment.
839    o cleanup our namelist syntax in verification:
840      - make it more F95 standards compliant (some work still needed)
841      - allows the vast majority of our tests to work with gfortran
842    o Non-Hydrostatic:
843     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
844     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
845    o Allow to apply AB on T,S rather than on AB(gT,gS):
846     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
847     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
848       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
849     - need a "clever" read_pickup to restart from the other AB formulation
850    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
851    o remove some unused variables (reduces number of compiler warnings)
852    o adjoint
853      * Disable useVariableViscosity for adjoint for time being
854        (there are a number of extensive recomputations)
855      * Initialize certain variables needed for adjoint
856    
857    checkpoint57w_post
858    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
859                 fix the singleCpuIO RS version of MDSWRITEFIELD
860       and add a WARNING if using globalFiles=T with multi-processors.
861    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
862      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
863    o tracer advection scheme:
864      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
865       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
866       was not very convenient).
867      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
868       (further tests needed for the implicit DST & Flux-Limiter schemes).
869    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
870      and sRef for convenience, handy, when you want to initialize
871      ptracers in a large domain with a constant non-zero value. Also,
872      untangle ptracers_init.F a little.
873    
874    checkpoint57v_post
875    o change dome exp. to use variable viscosity in side-drag terms.
876    o remove all the files from the cfc_offline test since they are now
877      incorporated into tutorial_cfc_offline which has been producing
878      identical results for a few days of testing
879    o add new parameter: sideDragFactor to enable half-slip-side BC
880      and change side-drag S/R to use viscosity from mom_calc_visc
881      (can switch back by setting sideDragFactor=0.); affects results at
882      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
883       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
884    o vorticity & strain are now computed without masking, to account for
885      no-slip-side BC in variable viscosity calculation ; mask is applied
886      anyway later on, before computing advection/coriolis terms.
887    o modify exp4 to test new obcs support for reading from external files
888      and for passive tracers
889    o fix behavior of ptracers_monitor when monitor output is written to a
890      netcdf-file; still not independent of monitor.F (writes in the same
891      file).
892    o change default value of tRef (put a uniform, meaningful value for ocean
893      & atmos) and initialize sRef (was missing, as Martin mentioned).
894    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
895      to be proportional to enstrophy dissipation length.  Thus,
896       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
897      This is now consistent with Smagorinsky and with the manual.
898    
899    checkpoint57u_post
900    o OBCS and PTRACERS: add open boundary support for passive tracers
901      - either use homogenous (pseudo) v.Neumann conditions or prescribe
902        OB-values from file; this is not different from the way theta and salinity
903        are treated
904      - however, Orlanski-radiation conditions are not supported, and the model
905        will stop if you use pTracers and Orlanski at the same time.
906      - beefed up the rountine obcs_external_fields_load: now only those open
907        boundary values are overwritten with values from files for which there
908        are really files, otherwise the OB-fields remain untouched. This makes
909        it possible to use different OBs at different ends of the domain (as
910        with EXF)
911    o reduce number of exch calls in shap_filt (s2).
912    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
913      truncation level) 4/5 MLAdjust test results (11&12 digits match).
914    
915    checkpoint57t_post
916    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
917    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
918      same truncation, independent of the face number: affects affects several
919      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
920    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
921      note that biharmonic viscosity + no-slip was not tested in any experiment.
922    o fix bug in non-linear free-surf side-drag ; generate new output for
923      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
924    o make mnc honor the writeBinaryPrec flag for most kinds of output
925    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
926    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
927      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
928    o add brackets in multi-terms sum to get same truncation, independent of
929      the face number (manage to get exactly same value of gU,gV at the cs-edge)
930      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
931    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
932      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
933      a maximum grid-scale Reynolds number.  Also, changes all length calculations
934      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
935      Suggested values of viscosity parameters found in mom_calc_visc.
936      Many new viscosity diagnostics available.
937    
938    checkpoint57s_post
939    o Add clearing-house for viscosity calculations, mom_calc_visc and
940      correct numerous bugs in LeithD and Smagorinsky discretizations.  
941      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
942      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
943      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
944      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
945      The Strain-Tension form is now called with useStrainTensonVisc=.true.
946      ViscAhStrain and viscAhTension are now retired.
947    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
948    o In response to JMC's bug report, genmake2 now ignores any soft-links
949      that it finds in the *current* directory when searching for files.
950      Soft-links found in any other source directories will still work as
951      they did before.
952    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
953      a C routine to unlimit the stack size
954    o mnc-ify pkg/aim snapshot vars
955    o mnc-ify pkg/land as requested by Daniel
956    o various changes to mnc including:
957      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
958      - output can now be grouped so that all files within a group
959          change the ITER portion of their names in lock-step together
960      - can now read ("global") PER-FACE (in addition to PER-TILE) files
961          and works with both EXCH1 and EXCH2 (but needs more testing)
962      - writing works for all verification test cases w/ g77 on Linux
963    
964    checkpoint57r_post
965    o make MNC variable initialization happen earlier
966    o add diagnostics for (almost) each term of the momentum Eq.
967    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
968    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
969    o remove MINIMAL_TAVE_OUTPUT option ;
970      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
971    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
972      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
973    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
974    o add time-dependent SST, SSS control
975    o cost terms in ecco/ modularized (new cost_generic.F)
976    o cost_averages routines are modularized (new cost_averagesgeneric.F)
977    o new infrastructure for seaice model vs. obs misfits in seaice/
978      * driver from the_main_loop.F is seaice_cost_driver.F
979      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
980      * gradient check in Exp. 6a of natl_box_adjoint/
981    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
982      (see README file)
983    
984    checkpoint57q_post
985    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
986    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
987      - bug was reported by Jean-Michel and Ian Fenty
988    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
989      update exp. cpl_aim+ocn output.
990    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
991      Needed for high-res. runs with large global files
992      to be able to limit tapelev size
993    o Changed some tests for adjoint:
994      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
995      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
996      * global_ocean.90x40x15/ back to default 3-level checkpointing
997    o Modifications to enable scripted COMMON to MODULE conversion
998      * verification/OpenAD/code/ has necessary scripts and description;
999      * converts, compiles and runs successfully;
1000    
1001    checkpoint57p_post
1002    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1003    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1004      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1005    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1006    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1007      (was already the case for dissipation with mom_vecinv,
1008       and also the case for grad.PhiHyd when staggered-timeStep)
1009      This will allow to put dissipation out-off the AB time-stepping.
1010     Unfortunately, affects truncation error. Update output of exp. that "fails"
1011      (cg2d matching number) and leave the others for later: front_relax(10),
1012      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1013      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1014    
1015    checkpoint57o_post
1016    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1017      (2) its ready to be documented during the 20050801 DocFest
1018    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1019      for ideal_2D_oce and lab_sea on linux_ia32_g77
1020    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1021      in global1x1_tot/code_seaice_adj to access indices 32, 33
1022      (worth another tag)
1023    
1024    checkpoint57n_post
1025    o adding precip control xx_precip 32
1026    o adding swflux control xx_swflux 33
1027    o Replacing 10 forcing penalty cost routines by 1 generic.
1028    o Implementing partitioning in time-mean and variable adjustment
1029      for atmos. state.
1030    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1031    o in natl_box_adjoint:
1032      * updated exp 1 to 10
1033        (but does not have time-mean vs. variable split results yet)
1034    o updated global1x1/*_seaice_adj/
1035      to incorporate latest changes
1036    o enable useSingleCpuIO for mdsio vector routines
1037      (applies in particular to tapelev I/O)
1038    o removed inefficient K-loop in all active_file*control*.F
1039    
1040    checkpoint57m_post
1041    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1042      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1043    o pkg/exch2: filling of face-corner halo regions is optional
1044      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1045    
1046    checkpoint57l_post
1047     tag before updating tutorials (pre-release-2)
1048    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1049       for output and interpolation of input fields onto model grid)
1050    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1051       Affects results of exp. rotating_tank ; update output.txt.
1052    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1053          and taking the square quantity and/or using a fraction-weight field.
1054    o fix aim_diagnostics_init.F mate numbers.
1055    o add mnc output capability to diagnostics/diagstat and update
1056      our cvsignore files for the ACSII output generated
1057    
1058    checkpoint57k_post
1059    o lab_sea now uses diagnostics package and provides a suite of
1060      new EXF diagnostics output.
1061    
1062    checkpoint57j_post
1063    o exf
1064      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1065        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1066        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1067      * extended diagnostics output
1068        - now includes all EXF variables
1069        - hs, hl moved to common block
1070        - separate S/R for diagnostics, called after ctrl vector is added
1071        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1072        - EXFqnet contains true Qnet (i.e. includes qsw)
1073      * updated verif. lab_sea, global_with_exf
1074      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1075        to ensure that diagnostics sees a true EXFqnet
1076    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1077    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1078      several times with different frequencies.
1079    o mnc-ify the thsice package as requested by Daniel Enderton
1080      - the monitor--MNC output needs work
1081      - many attributes need to be added (most are currently blank)
1082    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1083      - many attributes need to be added (most are currently blank)
1084    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1085    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1086    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1087      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1088         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1089    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1090     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1091    
1092    checkpoint57i_post
1093    o Diagnostics package was changed: diagnostic allocation is now deactivated
1094      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1095    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1096      add 1rst Order upwind vertical Shear.
1097    o add a quick fix for A/B checkpointing in OFFLINE mode
1098    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1099      end-run around the C/Fortran linking horror in eesup/src/timers.F
1100    o added pkg/runclock: allows user to terminate run based on wall clock
1101    o added non-hydrostatic scaling parameter: nh_am2
1102    o pkg/my82: futile attempt to make results compiler-independent by adding
1103      some "_d 0", etc. no effect.
1104    o for mnc output, fill the 'T' coordinate var with myTime and create a
1105      separate 'iter' variable for iteration count
1106    o pkg/diagnostics:
1107      add new capability: output of Global/Regional & per-level statistics ;
1108      tested against monitor output (including land & thSIce) on various exp.
1109    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1110    
1111    checkpoint57h_done
1112      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1113      data.diagnostics, data.gchem, data.ptracers) is done.
1114    
1115    o pkg/diagnostics: prepare for Global/Regional statistics.
1116      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1117    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1118      and rename it: DIFFERENT_MULTIPLE
1119    
1120    checkpoint57h_post
1121    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1122    o pkg/diagnostics: change output frequency, now in seconds (instead
1123      of Nb of iterations). This requires to change data.diagnostics.
1124    checkpoint57h_pre
1125    
1126    o in mnc, let the user create the output dir if both mnc_outdir_date
1127      and mnc_outdir_num are false
1128    o add fflags() to pkg/diagnostics which allows one to specify, on a
1129      per-file basis, the file precision [default behavior is unchanged]
1130    o added diagnostics to pkg/kpp, including computation of mixed layer
1131      depth based on a temperature/density criterion
1132    o updated verification/natl_box to test the new pkg/kpp diagnostics
1133    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1134    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1135    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1136      not mnc -- this mistake was found by JMC and is now corrected
1137    
1138    checkpoint57g_post
1139    o add Adams-Bashforth 3rd Order time stepping:
1140      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1141      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1142    checkpoint57g_pre
1143    
1144    o make lambda[Theta,Salt]ClimRelax spatially varying
1145      (default remains spatially uniform constant based on tau)
1146    o added new control variables
1147      * init. uVel, vVel, etanN
1148      * lambda[Theta,Salt]ClimRelax
1149    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1150      (suggested by G. Forget)
1151    
1152    checkpoint57f_post
1153    o add parameter "baseTime" = model base time = time at iteration zero
1154      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1155      account for baseTime shift
1156    o move Coriolis arrays from PARAMS.h to GRID.h
1157    checkpoint57f_pre
1158    
1159    o mnc-ifying the seaice package
1160    o introduced an alternative length scale calculation for use in the limiting
1161      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1162    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1163    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1164      as well as grad(vort3).  Made it compatible with both approximate form
1165      for the cubed sphere and full form of these gradients.  Added flag
1166      useFullLeith to select between approximate and full form.  
1167    o add "d0" in getcon.F to reduce differences between compilers/platforms
1168      update output.txt of exp. fizhi-gridalt-hs
1169    o change port_rand funtion to allow to set the seed.
1170    o fix obscure MNC bug involving conversion between reals and integers
1171      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1172        new version is now more standards-compliant
1173    o adjoint-related modifications
1174      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1175      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1176      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1177    
1178    checkpoint57e_post
1179    o Adding eddy stress controls a la Ferreira et al.
1180    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1181    
1182    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1183      update output.txt of exp. fizhi-gridalt-hs
1184    o add more "Z" dimensions and associated coordinate vars to MNC
1185    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1186    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1187      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1188      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1189      months and years.  Requires pkg/cal.
1190    o diagnostics: add pickup functionality
1191      - off by default for backwards compatibility
1192      - current version only uses MDSIO -- MNC will be added
1193    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1194    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1195    
1196    checkpoint57d_post
1197    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1198    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1199      output from the diagnostics package
1200    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1201    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1202      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1203    o add coordinate variables to the MNC output from the diagnostics package
1204    o change MNC-flags default value: true when useMNC=TRUE
1205    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1206      the ability (off by default) to read the grid information using MNC
1207    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1208    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1209    o do snap-shot diagnostics at the middle of the time-interval (instead of
1210      at the end).
1211    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1212      new test for AIM with thSIce + slab-ocean
1213    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1214    o move state variable diagnostics to the beginning of the time step ;
1215      (note: still needs some work specially for snap-shot diagnostics)
1216      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1217    
1218    checkpoint57c_post
1219    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1220    o generate new output.txt files on faulks with g77 & the new -ieee option
1221    checkpoint57c_pre
1222    
1223    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1224      update output.txt of exp. global_ocean.90x40x15
1225    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1226      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1227    o add saltFlux(+File) forcing capability with periodicExternalForcing
1228    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1229    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1230    o improvements for the MNC output from DIAGNOSTICS:
1231      - correct handling of the unlimitied dimension
1232      - all dims now have associated coordinate variables
1233      - variables located at U, V, and Corner ("Z") points are now written
1234        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1235        *all* data points are output
1236    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1237    o added pkg/seaice/seaice_monitor.F
1238    o mdsio_readfield.F can now read files visible only to master MPI process.
1239    o pkg/seaice: some test code for ice-modified ocean stress
1240    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1241      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1242      spurious negative numbers for precipitation and humidity.  Will cause
1243      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1244    o pkg/ctrl/
1245      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1246        May be enabled via doPackDiag
1247      *  introduce z-scaling of
1248         + gradient (doZscalePack) and
1249         + control (doZscaleUnpack)
1250    o pkg/mdsio/
1251      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1252      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1253    
1254    checkpoint57b_post
1255    o simplify options in diagnostics_fill arguments (remove weird combinations)
1256    o fix MNC coordinate variables so that they now contain per-face index
1257      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1258      general, EXCH2 grids are only aligned to a "local" coordinate system
1259    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1260    o Implement instantaneous output within pkg diagnostics:
1261      setting a negative frequency in data.diagnostics produces
1262     "snap-shot" output (as opposed to time-average if freq > 0)
1263    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1264      NOTE: change ptracer diagnostics name: use 2 characters to work with
1265            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1266    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1267      becomes the coordinate variable for the 'T' dimension
1268    o add CF-style coordinate variables to MNC
1269      - just a first cut:  numbers are meaningless on the cubesphere and
1270        missing along the T axis but otherwise it works!
1271    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1272    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1273    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1274      this is based directly on what the model compute, so that the content of
1275      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1276    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1277    o clean up build options files for SunOS, in particular
1278      - remove -traditional from xmakedepend
1279      - change -xarch=v9 to -xarch=native for f77
1280      - restore use of make (not gmake)
1281      - add CC=gcc if using g77
1282    o changes per discussion of AM, JMC, & EH3 today:
1283      - move redundant "grid" variables out of "state" -- in preparation of
1284        creating proper CF-style coordinate variables and in recognition
1285        that any/all grid variables can be easily copied (eg. w/NCO) from
1286        the grid files into any of the other NetCDF files
1287      - *always* output grid variables with MDSIO (this will eventually be
1288        changed)
1289      - output MNC grid file if useMNC is true
1290    o every instance of _END_MASTER() has been found and replaced with
1291      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1292      preprocessors
1293    o re-arrange diagnostics pkg initialisation:
1294     - allow each package to extend the available diagnostics list
1295     - add some checking and fix small problems (multi-threaded, ...)
1296     - new S/R diagnostics_fill (replace fill_diagnostics):
1297       look through the short list of active diag. (instead of the long list)
1298       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1299    
1300    checkpoint57a_post
1301    o this set of changes restores TAMC compatibility
1302      tested for global_ocean.90x40x15 adjoint on trough
1303      (what a pain)
1304    
1305    checkpoint57a_pre
1306    o some modifs in tools/build_options for sunos
1307    o call ctrl_pack for ctrl at end for optimcycle=0
1308    
1309    checkpoint57
1310    o add horizontal bi-harmonic viscosity for vertical velocity
1311      - new parameter viscA4W (defaults to viscA4)
1312      - affects only non-hydrostatic code
1313      - to be done: no-slip lateral boundary conditions
1314    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1315    o implement Implicit Vertical advection for pTracers
1316    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1317      (implemented also for implicit vertical diffusion & advection)
1318    o OBCS: extend application of tracer open boundary conditions
1319      to a strip beyond the boundary of width Olx/Oly
1320    o add call monitor to TAF set of required calls (flow directives)
1321      and include in natl_box_adjoint
1322    o untangle a few ifdefs related to cost, ctrl, autodiff
1323      untangel a few ALLOW_ECCO_OPTIMIZATION
1324    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1325      (theta2, salt2 in ecco_cost_weights)
1326    
1327    checkpoint56c_post
1328    o OBCS as control variables
1329      - update ctrl_ad_diff.list, obcs_ad_diff.list
1330      - remove balance of obcs controls from default
1331      - fix index bug nobcs in ctrl_init
1332      - fix dummy fields filen in ctrl_pack
1333      - add dummy weights for obcs
1334    o lsopt: comment out fort.94 output
1335    o optim:
1336      - remove unnecessary header files
1337      - adjusted namelists
1338      - add xerbla.F to Makefile
1339    o exf:
1340      - multiple modifications of exf_check_range
1341      - unit change in exf_init_runoff from [m/year] to [m/s]
1342    o mdsio:
1343      - i/o-vector change debugLevel from debLevA to debLevB
1344    
1345    checkpoint56b_post
1346    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1347      is called from DO_THE_MODEL_IO
1348      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1349      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1350      - clean up PTRACERS_WRITE_TIMEAVE a little
1351    o add another verification experiment that tests both the cfc-pkg and
1352      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1353      reactive tendencies treated inline with regular timestepping
1354    o testreport previously did a lousy job of comparing small numbers, so
1355      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1356      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1357      testreport.
1358    o ptracers_monitor: bug fix for MPI
1359    
1360    checkpoint56a_post
1361    o GCHEM: finish reorganizating the package
1362      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1363        (introduces another 3D-array for each passive tracer, but only if
1364        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1365        gchemTendency is not needed because the timestep is done separately)
1366      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1367      - GCHEM is now---more or less cleanly---separate from PTRACERS
1368      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1369        so clear to me how that should be done in a general way.
1370    o CFC: improve formatting of output in CFC_ATMOS
1371    o PTRACERS:
1372      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1373        that ALL experiments with ptracers enable can be checked. This makes
1374        GCHEM_MONITOR obsolete.
1375      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1376        monitorFreq
1377      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1378    o add PTRACERS (PTR0[1-5]) to testreport output
1379    o exf_check_range:
1380      * default changed to .TRUE.
1381      * will check values for niter0 if debLevA, every timestep if debLevB
1382      * STOP in exf_check_range if 'out of range'
1383      * range chosen generous to allow for potential extema
1384      TBD: a version with stricter range
1385           permitted range would be runtime parameters
1386    o GMredi:
1387      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1388      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1389      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1390    o GCHEM:
1391      - move call to GCHEM_FORCING_SEP, so that it is now called before
1392        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1393      - introduced a useGCHEM runtime flag and applied it everywhere.
1394      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1395        this flag is now only visible within GCHEM-pkg routines.
1396      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1397        be replaced by a 3D array that is computed before thermodynamics; for
1398        this, the tracer ID iTracer had to be included into the parameter list
1399        of ptracers_forcing
1400      - set up forward_step to call gchem_forcing, that will replace
1401        gchem_forcing_int in ptracers_forcing
1402      - cleaning up
1403    o small cleaning of exch2: remove files that are also in eesupp/src
1404    
1405    checkpoint56
1406    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1407    o mnc: cleanup "full" files--fixes out-of-memory problem
1408    o ECCO-GODAE
1409      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1410      * fully merged and updated from SIO code
1411        windstress sign change affects
1412        - exf_inscal_[u/v]stress
1413        - sign of xx_tau[u/v] adjustments
1414        - signs in cost_scat
1415      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1416      * natl_box_adjoint updated and compressed
1417      * 2-level checkpoint switch added
1418        (tested in EXP. 1 of natl_box_adjoint)
1419      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1420    o SVD
1421      * first complete, non-hacked version for SVD calculations
1422      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1423        performed via direct access files admtlm_vector.it????
1424        (via ctrl_[un]pack)
1425      * optimcycle is used for ARPACK iteration counter
1426        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1427      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1428        and add linear transforms where necessary
1429      * controls are initial/final SST, SSS (can be extended; need to check
1430        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1431    o mdsio: filename info to both stderr, stdout
1432    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1433      from sign change
1434    
1435    checkpoint55j_post
1436    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1437      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1438    o add consistent build directories and .cvsignore files to verification
1439    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1440    o make all subroutines 30 or less characters in length for certain older
1441      compilers to work (a thorough search only turns up two routines in
1442      pkg/ptracers)
1443    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1444      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1445    
1446    checkpoint55i_post
1447    o change arrays for total vertical diffusivity (2.D if explicit,
1448      3.D if implicit) ; each ptracer uses its own background value.
1449    o added mnc/NetCDF output capability to ocn_compon_interf
1450      - added bits to verification/cpl_aim+ocn so that it can run on
1451        ITRDA and other clusters without the mpirun "-wd" option
1452    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1453      configuration
1454    o give MNC the ability to create additional files rather than
1455      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1456      - the default is just less than 2GB which is a practical limit
1457        on many systems
1458    o Compute the non-local term using either KPP vertical diffusivity (=default)
1459       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1460    
1461    checkpoint55h_post
1462    o add verification test "vermix"
1463    o remove all the *_ioinc flags and replace with the single global
1464      outputTypesInclusive flag
1465    o allow to set a vertical profile of vertical diffusivity for T & S
1466    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1467    o useMNC moved from data.mnc to data.pkg
1468    
1469    checkpoint55g_post
1470    o Renaming carbon AD experiments to comply with testreport conventions
1471    o Updating adjoint of Held-Suarez hs94.1x64x5
1472    o Fixing directives for non-ECCO forward_step, after ECCO directives
1473      have been fixed to avoid recomp. of do_oceanic_phys
1474      Works well for global_ocean.90x40x15,
1475      but recomp. issue remains for carbon
1476    o Updating adjoint output for natl_box_adjoint after
1477      pkg/ecco has been modified (see taga c55d_post)
1478    
1479    checkpoint55f_post
1480    o rename to timeave_init_fixed
1481    
1482    checkpoint55e_post
1483    o some delicate re-shuffle of store directives to avoid one
1484      extra call of do_oceanic_physics
1485      affects ecco_the_main_loop.F, do_oceanic_physics.F
1486      checkpoint_lev1_directives.h
1487    o NB: this may break global_ocean adjoint temporarily,
1488      but it is clear how to fix it. Will do later, need this now.
1489    
1490    checkpoint55d_post
1491    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1492    o ecco_cost_weights is modified to 1x1 runs
1493    o modifs to allow observations to be read in as
1494      single file or yearly files
1495    o enable to read exf forcing fields as either
1496      single file or yearly files (flag useExfYearlyFields)
1497    checkpoint55d_pre
1498    
1499    o switch between 2-level and 3-level checkpointing
1500    o add ability of MNC to write local and "partial" (eg. 2D slices where
1501      the full 3D field is never actually stored) arrays to NetCDF files
1502      with the correct (that is, the complete multi-dimensional) set of
1503      array indicies
1504      - used in mom_vecinv() to write the diagFreq output
1505      - tested (demonstrated) in verification/aim.5l_cs
1506    o further mnc-ification
1507      - add verification/lab_sea to the list with mnc setups
1508      - fix undefined mnc v-names in cd_code
1509      - add kpp to mnc output (both snapshot and timeave)
1510    o non-hydrostatic code
1511      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1512        in calc_gw.F
1513      - defaults to viscAh
1514      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1515        friction or Leith) in non-hydrostatic mode, as long as there is
1516        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1517    o pkg/cost
1518      extend simple cost functions to treat time mean quantities
1519      (T,U,V) via cost_accumulate_state from cost_tile
1520    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1521        be 2 times larger than the minimum size the advection scheme requires.
1522        now get a perfect conservation of salt in advect_cs test-exp (updated)
1523    o GGL90 (Gaspar's TKE mixed layer)
1524      - add horizontal diffusion of TKE, requires exchanges in
1525        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1526        default. In OPA there is no horizontal diffusion of TKE but the
1527        mixing coefficients are computed from a horizontal average of TKE of
1528        6 points or so. I think that diffusion has a little more physical
1529        justification.
1530      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1531        was in vain)
1532      - mask tke-variable in ggl90_init
1533    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1534    o fix biharmonic diffusion on CS-grid.
1535    o more obcs stuff
1536      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1537        for reading boundary values. This routine is called from
1538        obcs_prescribe_read
1539      - updated obcs_check
1540      - changed sponge layer relaxation parameter units for days to seconds
1541      - turned off sponge layer by default
1542      - changed argument list of OBCS_CALC to myTime+deltaTclock
1543      - fixed about 35 bugs in obcs_external_fields_load
1544    
1545    checkpoint55c_post
1546    o obcs stuff
1547      - new runtime flags useOBCSprescribe, useOBCSbalance
1548      - re-arranged obcs_calc
1549      - moved exf_getobcs to obcs_prescibe_read
1550        obcs_prescibe_read is called after ORLANSKI stuff
1551        and independent of it (executable can contain all).
1552      - updated obcs_check
1553      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1554        These may be necessary only if tangential velocities are
1555        prescribed at OB, not sure, needs testing.
1556    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1557      which simplifies the calls and passes the ifc check-bounds test
1558    
1559    checkpoint55b_post
1560    o add a 2D scalar, Z location, exchange_2 routine.
1561    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1562      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1563      affects advect_cs results (for the wrong reason): update output.txt
1564    o use a more standard discretization for biharmonic viscosity ;
1565     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1566      affects results of dome set-up: update output.txt
1567    o fix gad_advection.F (CubedSphere part), back to version 1.23
1568    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1569    
1570    checkpoint55a_post
1571    o merged code to
1572      * prescribe/read time-dependent open boundaries
1573        (works in conjunction with exf, cal)
1574      * sponge layer code for open boundaries
1575      * each boundary N/S/E/W now has its own CPP option
1576        (healthy for the adjoint)
1577    
1578    checkpoint55
1579    o up-to-date adjoint of previous breaks
1580      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1581      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1582      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1583      - carbon: * remove tr1-related adjoint verification
1584                * add ptracer as control variable
1585    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1586      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1587    
1588    checkpoint54f_post
1589    o in verification/carbin/ remove experiment related to
1590      ALLOW_PASSIVE_TRACER (array tr1 etc)
1591      code_ad/ input_ad/ results_ad
1592    
1593    o add two new packages
1594      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1595        + subject to optimization (memory)
1596      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1597        + subject to reordering (many GOTOs in the original code)
1598        + so far opps is called for every (i,j) point, and then operates in
1599          the vertical; one may want to reorder the scheme in order operate in
1600          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1601          fields)
1602    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1603      - all verification tests compile and run with linux_ia32_g77
1604      - defaults are compatible with current input files--nothing
1605        should change if you were not previously using MNC
1606      - MNC output has been added in numerous places (eg. timeave)
1607        but there are still a few writes not yet do-able with MNC
1608        (this is in progress)
1609      - flags now allow for either/or/both use of MDSIO and MNC and
1610        documentation will soon follow
1611      - numerous small formatting cleanups for ProTeX
1612    o add version info (via BUILD_INFO.h) to MNC and stdout
1613    
1614    checkpoint54e_post
1615    o add two new packages
1616      - pp81 (Packanowski and Philander, 1981), Richardson number and
1617        stratification dependent mixing
1618      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1619      - these scheme operate in a similar manner as KPP (without ghat, of
1620        course), however there is only one diffusivity that is used for both
1621        temperature and salinity (and passive tracers)ç
1622    o add offline package
1623    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1624      provided by Stephanie Dutkiewicz
1625    o genmake2: add ability to search for C compilers and cleanup test output
1626      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1627    
1628    checkpoint54d_post
1629    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1630    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1631      leading to additional shift by 5 days each year of integration
1632       (i.e. leading to considerable offset over the years)
1633    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1634    o start with no AB and no initial filtering (staggerTimeStep):
1635      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1636    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1637      (external loading & cpl import/export stay in forward_step.F)
1638    o update coupling interface to work with new staggerTimeStep
1639    o change MDSIO ptracers_pickup.
1640    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1641    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1642    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1643    
1644    checkpoint54c_post
1645    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1646      this affects (truncation error) output.txt of test-exp:
1647       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1648    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1649    o change Qnet to always be the net heat flux, (+upward).
1650      affects (truncation error) output of natl_box exp.: updated
1651    o define the max number of passive tracers in PTRACERS_SIZE.h
1652    o start to test mnc routinely in exp0
1653    o add sea-ice loading (sIceLoad) as a new forcing field.
1654    
1655    checkpoint54b_post
1656    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1657       impressive on Altix and Opteron systems)
1658    o diagnostics can now write NetCDF files through the mnc package
1659    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1660    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1661    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1662      affects (truncation error) output of lab_sea & natl_box exp.: updated
1663    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1664    
1665    checkpoint54a_post
1666    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1667    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1668    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1669    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1670      + internal_wave (shift in writing cg2d_ini_res)
1671    checkpoint54a_pre
1672    
1673    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1674      - modified verification/lab_sea and natl_box_adjoint accordingly
1675    
1676    checkpoint54
1677    checkpoint53g_post
1678    o prepare splitting of thermodynamics: store convect.counter in common block
1679    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1680      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1681    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1682    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1683    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1684    o restore adjointability
1685    
1686    checkpoint53f_post
1687    o modifications that affect AIM experiment results (update output.txt):
1688      - no advection of S at top interface Nr (pkg/generic_advdiff)
1689      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1690    o AIM pkg:
1691      - include stability function into surf.Flux derivative relative to Tsurf
1692      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1693    
1694    checkpoint53e_post
1695    o merged cylindrical coord configuration
1696    o added rotating_tank experiment
1697    checkpoint53e_pre
1698    
1699    checkpoint53d_post
1700    o faulks upgraded: re-generate output.txt that have changed:
1701       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1702    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1703    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1704    o added Sadourny discretization of Coriolis
1705      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1706      - re-enabled use of omega3 (useAbsVorticity)
1707    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1708      vector-invariant equations
1709      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1710    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1711      hopefully without new bugs
1712      - still to do: biharmonic friction for non-hydrostatic w
1713    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1714    o regenerated output for global_ocean_ebm (using -ieee)
1715    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1716      of mom_common/
1717      - simple re-arrangement of instructions within computing loop
1718    checkpoint53d_pre
1719    
1720    checkpoint53c_post
1721    o new version of coupler for AIM+thSIce and Ocean models
1722     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1723     - land: change Evaporation of snow
1724     - aim with thSIce: fix bug in snow-precip.
1725    o changes to calc_gw.F
1726     - bug fix for w^2 term near the bottom boundary
1727     - (hopefully) improve the lateral slip boundary condtions for use with
1728        partial/looped cells
1729      - because the bug fix changes two verification experiments anyway (exp5
1730        and plume on slope), change the lateral boundary condition from half slip
1731        to the value of no_slip_sides
1732    o ebm package wasnt quite up to the parallel task. Fixed that.
1733    o Adjoint of EBM package + verification
1734      * TLM OK
1735      * ADM not sufficient accuracy yet (needs further testing)
1736    
1737    checkpoint53b_post
1738    o Commiting new energy balance model to repository
1739      * package is pkg/ebm
1740      * verif. is verification/global_ocean_ebm
1741      * references are in ebm_driver.F
1742    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1743    C        Global thermohaline circulation. Part I:
1744    C        Sensitivity to atmospheric moisture transport.
1745    C        J. Climate 12(1), 71-82
1746    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1747    C        Global thermohaline circulation. Part II:
1748    C        Sensitivity with interactive transport.
1749    C        J. Climate 12(1), 83-91
1750    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1751    C        Destabilization of the thermohaline circulation
1752    C        by atmospheric eddy transports.
1753    C        J. Climate 7(12), 1870-1882
1754    o Will need long integration testing.
1755    checkpoint53b_pre
1756    
1757    o created pkg/mom_common in preparation for variable viscosity code
1758    o renamed and split ini_mnc_io
1759    o pkg/land: only liquid water can diffuse or run-off
1760    o AIM using land: soil wetness availability account for snow
1761    o added printMapIncludesZeros to EEPARMS namelist
1762    
1763    checkpoint53a_post
1764    o restore TAMC compatiility for exf_constants.h
1765      (no usage of _d in .h)
1766    o Additional storing in KPP in an attempt to fix
1767      TAMC problem with adjoint of KPP code.
1768      (no success...)
1769      Identical code works fine with TAF.
1770    o Fixed verification/natl_box_adjoint experiments.
1771      Initial conditions for Experiments 4 and 5 are now
1772      set to "SEAICE_initialHEFF=0", which is more reasonable,
1773      and hence gives results closer to that of Experiment 2.
1774      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1775    
1776    checkpoint53
1777    o stable checkpoint with up to date adjoint
1778      TLM tests only run for 1st grdchk at the moment. Its unclear if
1779      this is a code problem or a problem with resetting code for g_
1780      variables that is being autogenerated wrong.
1781      Otherwise:
1782       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1783       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1784         are both still in chaos following their security messes.
1785    
1786    checkpoint52n_post
1787    o various build (mostly genmake2) changes including:
1788      - ability to build/run more easily within Cygwin and MacOS X
1789      - more complicated Makefiles with a stronger dependence on Gnu Make
1790    o pkg/seaice modifications
1791      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1792        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1793        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1794      - changed proxy for geostrophic velocity and updated
1795        verification/lab_sea/results/* accordingly
1796      - removed ADI dynamic solver from pkg/seaice
1797      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1798        they caused a segmentation fault under certain circumstances
1799      - removed unused field WATR
1800    o bug fix in exf-package:
1801      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1802         now reflect that.
1803    o small fixes in the cal-package:
1804      - set reference date to first of January for the 'model'-calendar
1805      - failing of cal_CheckDate in cal_FullDate now actually results in a
1806        warning
1807    o small modifications in exf-package to increase flexibility:
1808      - change climtempfreeze from a constant to a runtime parameter that
1809        is specified in data.exf_clim (default = -1.9)
1810      - introduce runtime parameter windstressmax (default = 2.0) that is
1811        specified in data.exf
1812    o fix in pkg/thsice:
1813      - update Evap (Tsf changes) to be consistent with Latent heat flux
1814      - maintain snow precipitation unchanged (even if Tsf >=0).
1815     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1816    
1817    checkpoint52m_post
1818    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1819      this does not change any of the results, because myIter=0 in swfrac always
1820      lead to jwtype=2 (the default anyway), but the call makes little sense
1821      as a default
1822    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1823    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1824      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1825    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1826    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1827    o extending useSingleCpuIO option to work with new exch2 I/O format
1828      - old-style, missing-tile I/O is still accessible by defining CPP
1829        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1830    o monitor package can write to NetCDF files and/or STDOUT
1831    o fix re-definition bug in MNC_GRID_INIT_ALL()
1832    o doc/api_reference added
1833      - a framework for building an API Reference Manual using all
1834        the "protex" comments embedded in the code
1835      - see pkg/generic_advdiff, pkg/mnc for examples
1836    o MNC:
1837      - make myThid the last argument for all subroutines
1838      - new default for the grid files: NO halos
1839      - add useMNC and other run-time flags
1840      - separate per-file-group handling of the unlimited dimension
1841      - early initialization of MNC w/ flags read at the eeboot stage
1842        and lookup tables set in initialize_fixed
1843      - write all MNC output to a freshly-created directory
1844    o thermodynamics sea-ice (thsice) is now tested with testreport.
1845    o test exp. advect_cs: use the standard cs32 grid ; update output.
1846    o Added functionality to grdchk:
1847      pick global i,j,k position (or nearest wet) where to perform check.
1848    
1849    checkpoint52l_post
1850    o new land formulation:
1851      a) use ground enthalpy as prognostic variable to ensure exact
1852         energy conservation.
1853      b) account for water temperature and for latent heat of freezing
1854         in all processes (rain, run-off, ground storage)
1855      c) compute surface and ground temperature implicitly.
1856    o aim_v23 modification for new land model:
1857      a) Treat separately land / ocean / sea-ice surface fluxes
1858         to allow implicit computation of land & sea-ice surface temp.
1859      b) add snow precipitation.
1860    checkpoint52l_pre
1861    
1862    o fix problem (when 1 tile is empty) in min/max monitor.
1863    o fix bug in timeAve (u,vZetatave in common block)
1864    o no restoring terms under ice for pkg/seaice
1865    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1866    o bug fix for pkg/seaice pickups
1867    o change MNC call locations and add coordinate attributes
1868    o mask vorticity at the corner ; affects global_ocean.cs output
1869    o fix ini_curvilinear_grid ; test CS experiments with mpi
1870    o aim.5l_cs: modify sea-ice fraction input file ; update output
1871    o exf: Adding simple range check routine for exf fields after read
1872    
1873    checkpoint52k_post
1874    o removed top-level directory "diags"
1875      - we migrated these functions to pkg/timeave a long time ago
1876    o fixed bug introduced in pkg/monitor
1877    o accuracy ctrlprec = 32 insuffient for gradient checks using
1878      averaged fields (I/O via cost_averages)
1879      -> use ctrl.h in active_file*.F to control I/O precision.
1880    o paramter list of CALL ADTHE_MAIN_LOOP
1881    o added initial do_the_model_io to ecco
1882    o set all ...Freq to zero after cost_final
1883      taveFreq, dumpFreq, pChkptFreq
1884    o MAIN and ECCO differentiability restored
1885    
1886    checkpoint52j_post
1887    o fix nchklev in tamc.h for global_ocean...
1888    o Bringing flow and store directives up-to-date
1889    o Really weird thing!
1890      call do_the_model_io from the_main_loop with parameters
1891      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1892      TAF places a faulty re-call of initialise_varia
1893      after cost_final call which should not be there!
1894    checkpoint52j_pre
1895    
1896    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1897      error messages
1898    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1899    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1900      debug output
1901    o modfied mdsio_writefield.F to handle non-global files under exch2
1902    o update AIM Cubed-Sphere exp (aim.5l_cs):
1903      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1904    o update AIM Equatorial Channel exp:
1905      use standard aim_v23 pkg and change the SST fields to be more realistic.
1906    o globalFile now works with exch2
1907    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1908      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1909    o limit timeave output for hi-res integrations
1910    
1911    checkpoint52i_post
1912    o removed CPP_EEOPTIONS.h from verification/*/code
1913    o updated the tiling for global_ocean_pressure
1914    checkpoint52i_pre
1915    
1916    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1917      the old pkg/aim).
1918    
1919    checkpoint52h_pre
1920    o shortened offending lines in exch2_send_rx?.template
1921    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1922    o genmake2: add build & execute test for NetCDF code
1923    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1924      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1925    o added useSingleCPUIO flag to monitor.F and mon_out.F
1926    o added temporary hack for sea-ice dynamics on the cube:
1927      metric terms are ignored and it is assumed that
1928      there is no sea-ice on cube faces 1, 2, 4, and 5.
1929    
1930    checkpoint52f_post
1931    o added exch2 cube routines to pkg/exch2
1932    o modified hs94.cs-32x32x5 to use it
1933    o added new grid files to hs94.cs-32x32x5
1934    checkpoint52f_pre
1935    
1936    checkpoint52e_post
1937    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1938      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1939    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1940      to work with implicit vertical advection and AB ;
1941    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1942    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1943     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1944    checkpoint52e_pre
1945    
1946    o fix bug in impldiff when Nr=1 or Nr=2.
1947    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1948    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1949    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1950      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1951    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1952    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1953    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1954    
1955    checkpoint52d_post
1956    o re-tiled many expts to allow comparison in multi-processor mode
1957      - updated output accordingly
1958      - changed hs94.128x64x5 to use intial T from file rather than use the
1959        random number generator
1960    o add infrastructure in model routines for fizhi and gridalt packages
1961    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1962    o changes to permit hi-res, cubed-sphere, configuration
1963      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1964      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1965      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1966        of surface winds for the cube
1967      (A verification experiment, based on global_ocean.cs32x15, but with
1968       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1969       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1970       complete with example surface forcing files and matlab scripts to look
1971       at the output and compare it with that of global_ocean.cs32x15.)
1972    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1973       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1974       to conform to the common rule.
1975    o check-in the first version of the coupler + interfaces for multi-components
1976       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1977       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1978       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1979       - ocean and atmos. share the same horizontal grid (no interpolation).
1980       - exchanges between component and coupler is done in forward_step
1981    o new verification experiment, cpl_aim+ocn:
1982       coupled ocean - AIM atmosphere on cs32 grid.
1983    
1984    checkpoint52d_pre
1985    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1986    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1987    
1988    checkpoint52c_post
1989    o Fixing OPTIONS files for use of exf:
1990      - ALLOW_ECCO not needed
1991      - ECCO_CPPOPTIONS.h should not be included from
1992        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1993        as has been the case in the past
1994      - All cal/exf related options are currently set in
1995        single header file. Should remain so until we
1996        agree on a consistent new policy.
1997    o Removed all CPP options for cal package.
1998      cal has no more CPP options.
1999    o modified STOREs in GAD_ADVECTION
2000    o corrected key comp. for passkey
2001    
2002    checkpoint52b_post
2003    o new version: "thsice" of thermodynamic sea-ice pkg:
2004     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2005     - modify fluxes but do not change theta directly;
2006     - light cleaning of bulk_force pkg (still needed with thsice).
2007     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2008       + output_thsice.txt to test thsice & bulk_force pkgs.
2009    o put back grid & coriolis monitor output.
2010    checkpoint52b_pre
2011    
2012    o call "do_the_model_io" at the beginning (=> dump initial state)
2013    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2014    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2015      (need info on NUMBER_OF_PTRACERS)
2016    o missing PTRACERS headers in some routines
2017    o default tamc.h in pkg/autodiff supposed to crash
2018      to ensure proper customization
2019    
2020    checkpoint52a_post
2021    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2022      - moved surfaceTendencyTice from pkg/seaice to main code
2023      - subroutine FREEZE_SURFACE now limits only surface temperature
2024        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2025        => new output.txt for global_ocean.cs32x15 & global_with_exf
2026      - keep the old version of FREEZE for backward compatibility;
2027        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2028      - corresponding modifs for TAF directives
2029    o added surface flux output variables to TIMEAVE_STATVARS
2030    o time-averaged output for pkg/ptracers
2031    o fix problem with ECCO-related divided adjoint
2032      snapshot file was missing some ad-variables,
2033      but no warning issued by TAF
2034    
2035    checkpoint52a_pre
2036    o some bug fixes for #undef REAL4_IS_SLOW
2037    
2038    checkpoint52 = ecco_c52_e35
2039    o after testing adjoints of checkpoint51u_post
2040    
2041    checkpoint51u_post
2042    o this is the post-merge tag of the ecco-branch
2043      (needs another clean checkout and re-testing)
2044    o various natl_box_adjoint configs and results
2045      but no input fields
2046    o obcs adjoint not yet merged!
2047    o adding ECCO global 1x1 and 2x2 degree configs
2048    o updated/extended some store directives for seaice
2049    o pkg/ecco now containes ecco-specific part of cost function
2050    o top level routines the_main_loop, forward_step
2051      supersede those in model/src/
2052      previous input data.cost now in data.ecco
2053      (new namelist ecco_cost_nml)
2054    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2055    
2056    checkpoint51t_post
2057    o this is the pre-merge tag of the ecco-branch
2058    
2059    checkpoint51s_post
2060    o cleanup: removed various obsolete #define-s
2061    o pkg/grdchk
2062      - renamed 'ph-grd 3' to 'grad-res'
2063      - merged from ecco-branch
2064        (remaining bug fixes for obcs gradient checks)
2065      - additional high-precision output for testreport
2066        (grep for 'precision_grdchk_result')
2067    
2068    checkpoint51r_post
2069    o cleaned up or removed CPP_OPTIONS.h files
2070    o updated results for some of the tests to reflect the new
2071      optfiles (-ieee: -O0 instead of -O3)
2072    
2073    checkpoint51q_post
2074    o cd_code:
2075      - moved cd_scheme.F -> cd_code_scheme.F
2076      - separate read_checkpoint from cd_code_ini_vars.F
2077      - separated cd_code part from write_checkpoint
2078      - updated AD_SOURCE, generated .flow
2079      - added CD_CODE_VARS.h to the_main_loop
2080      - Moving cd_code specific store dir.s to pkg/cd_code
2081    o ctrl package totally restructured
2082      - pack/unpack now optional and decoupled from
2083        xx_/adxx_ I/O
2084      - ctrl_pack/unpack cleaned
2085        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2086      - confined inclusion of AD_CONFIG.h to where necessary.
2087    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2088    
2089    checkpoint51p_post
2090    o create initial cd_code package
2091      - WARNING: the initialization of fields within packages
2092        is broken because INI_FIELDS (where READ_CHECKPOINT is
2093        called) is called *before* PACKAGES_INIT_VARIABLES.
2094        This seems to be backwards since
2095        1) its important to initially zero the entire field including
2096           the "halo" region
2097        2) zeroing needs to be done *before* reading pickup info
2098           and the pickup call might or might not happen in any
2099           particular run
2100      - this needs an overhaul for R2
2101    o cleanup verification/*/code/GMREDI_OPTIONS.h
2102    o cleanup testreport
2103    
2104    checkpoint51o_post
2105    o bringing AD-related verif's up to date with genmake2
2106      - carbon/
2107      - global_ocean.90x40x15/
2108      - hs.94.1x64x5/
2109      - (front_relax/ )
2110    o (more) consistent directory structure for AD-related verif.'s
2111    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2112    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2113    o bug fix in find_alpha.F for MDJWF:
2114      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2115        change rho -> rho-rhoConst
2116      - replace call find_rho to find_rhonum
2117    o initialisation of rFlx extended to full array (required by TAF)
2118      and shifted to thermodynamics
2119    o removed PTRACERS.h in ptracers routine
2120    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2121    o Correcting initialisations for fVerU, fVerV.
2122    o helping TAF to recognize dependency on kUp for
2123      fVerU, fVerV
2124    o Replacing delZ by delR in pkg/ctrl/
2125    checkpoint51o_pre
2126    
2127    o undid all of cp51 pending some cleanups and discussion
2128    o added the [#include "AD_CONFIG.h"] statement to all files that need
2129       it for adjoint/tl #defines
2130     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2131     o removed tools/genmake since it no longer works
2132    
2133    checkpoint51n_post
2134    o modifications to make FREEZE flux visible to pkg/kpp
2135      - moved surfaceTendencyTice from pkg/seaice to main code
2136      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2137      - subroutine FREEZE now limits only surface temperature
2138        (this means new output.txt for global_ocean.90x40x15,
2139         global_ocean.cs32x15, and global_with_exf)
2140    o added surface flux output variables to TIMEAVE_STATVARS
2141    
2142    checkpoint51n_pre
2143    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2144    o added [#include "AD_CONFIG.h"] to all files that use the following
2145      defines:
2146      - ALLOW_ADJOINT_RUN
2147      - ALLOW_TANGENTLINEAR_RUN
2148      - ALLOW_ECCO_OPTIMIZATION
2149    
2150    checkpoint51m_post
2151    o incorporating changes to get TAMC/TAF working in genmake2
2152      - added new TAMC/TAF targets to the Makefile
2153      - various cleanups related to package handling
2154      - these changes should have no impact on the forward model
2155    
2156    checkpoint51l_post
2157    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2158     - faster algorithm for cal_addtime.F
2159     - higher precision arithmetic, where needed
2160     - pkg/exf *startdate variables changed from calendar date to
2161       model integration time
2162    
2163    checkpoint51l_pre
2164    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2165    o enable to apply restoring on S & T only in a latitude band.
2166    o update output (external_forcing_surf modif. change truncation errors)
2167       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2168    
2169    checkpoint51k_post
2170    o change default to: useNHMTerms=.FALSE.
2171     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2172       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2173     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2174        exp1, ideal_2D_oce
2175     - change data file of oceanic exp (leave the results unchanged for now)
2176       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2177    o set gravitySign automatically according to the vertical coordinate used
2178      (and change sign: back to "logical" value: +1 when R increases downward)
2179    o added an include barrier to the default CPP_OPTIONS.h and
2180      removed the #include "PACKAGES_CONFIG.h" from it
2181    o fix a bug in mom_fluxform (from chk51j_post)
2182    
2183    checkpoint51j_post
2184    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2185    o adjusted some flow directives (dynamics, thermodynamics)
2186    o added cubed-sphere case to test cost function
2187    o heckpoint_lev?_directives.h now include
2188      pkg-specific directives, whenever those are enabled.
2189    o Moving pkg-specific flow directives to corresponding pkg
2190      Moving pkg-specific differentiation list to corresponding pkg
2191      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2192      ---> conventions are
2193           - pkg_ad.flow
2194           - pkg_ad_diff.list
2195           - pkg_ad_check_lev?_dir.h
2196    
2197    checkpoint51i_post
2198    o merge of the branch-genmake2
2199      - knowingly breaks the older genmake
2200      - automatic generation of all ALLOW_${PKG_NAME} defines
2201      - new testreport supersedes older testscript
2202    o large number of package inclusion and header cleanups
2203    checkpoint51i_pre
2204    
2205    o new output for adjoin of global ocean vector invariant
2206    o fix for checkpoint of thermodynamic seaice and bulk_force
2207    o Steph gchem various cleanups
2208    
2209    checkpoint 51h_pre
2210    o fixed some single quotes
2211    o modify gchem pkg to be more versatile
2212    o modifications to clean up dic pkg
2213    o add pkg/cfc
2214    
2215    checkpoint51g_post
2216    o provide links for ARPACK and ADM*TLM
2217    o start removing verification/vero/
2218    o update AD-related stuff
2219      (in particular some IF-statements in model/src/ routines)
2220    o adding to verification/global_ocean.90x40x15/ adjoint of
2221      vector invariant setup
2222    
2223    checkpoint51f_post
2224    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2225    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2226      of tracer Green's fucntions for ocean inversion project.
2227    
2228    checkpoint51f_pre
2229    o Added on-the-fly spatial interpolation capability
2230        "USE_EXF_INTERPOLATION" to pkg/exf.
2231      - This is a temporary Cartesian-grid hack until
2232        the super-duper ESMF coupler becomes available.
2233      - See verification/global_with_exf/README for usage example.
2234      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2235        flags and modified pkg/seaice accordingly.
2236    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2237        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2238        non-local transport term.
2239    
2240    checkpoint51e_post
2241    o pkg/mom_vecinv:
2242      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2243      - add time-ave diagnostic of vorticity advection.
2244    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2245    o atmospheric geopotential: - include water vapor effect;
2246                                - use p^kappa in p* scaling.
2247    o land pkg: read initial state from files.
2248    o AIM : add stratospheric drag in the upper level
2249    
2250    checkpoint51d_post
2251    o change function ILNBLNK (=> last non-blank char.) to return zero
2252      (instead of the string length) when the string. char is empty
2253    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2254    o modif's to restore TAMC compatibility
2255      - avoid "_d" constructs in PARAMETER declarations
2256      - avoid interrupting lines by comment lines
2257    o Use cluster local disks for purely local I/O
2258      vs. globally visible disks needed for ctrl stuff
2259      (merged from ecco-branch)
2260      - new active_file_loc... and mdsio_..._loc routines
2261      - affected packages: autodiff, ctrl, grdchk, mdsio
2262    
2263    checkpoint51c_post
2264    o introducing integer flag debugLevel
2265      - debLevZero: suppress all output
2266      - debLevA: standard
2267      - debLevB: equivalent to current debugMode=.TRUE.
2268    o introducing pathname variable mdsioLocalDir for mdsio
2269      that can be specified at runtime
2270      (relevant for cluster I/O to local disk)
2271    `
2272    >>>checkpoint51b_post
2273    adjoint of ptracers
2274    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2275    o extended state in checkpoint_lev?, etc.
2276    o alternative ctrl/cost with tr1 or ptracer
2277    o new comlev1_bibj_ptracers
2278    o new ptracers.flow
2279    o made ptracers_forcing same as external_forcing_s
2280    o added verification for adjoint with ptracers
2281      - adm. grdchk fail so far
2282      - tlm. grdchk OK
2283      - checked tapelev/comlev recomputations: OK
2284    <<<checkpoint51b_pre
2285    
2286    checkpoint51a_post
2287    o added code for biogeochemistry package
2288      - new pkgs: dic, gchem
2289      - new subroutine in ptracers
2290    o modify code for biogeo packages
2291      - in model/src and pkg/ptracers
2292    
2293    checkpoint51
2294    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2295      - autodiff, ctrl, exf, grdchk, seaice
2296      kept separate packages
2297      - cost, ecco, obcs
2298    o updating verification/internal_wave, verification/lab_sea
2299      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2300    
2301    checkpoint50i_post
2302    o Preparing next differentiable checkpoint and sync
2303      of MAIN vs. ecco-branch
2304      - 1st step: this one is differentiable
2305      - 2nd step: next(! not this) checkpoint will have updated packages
2306                  from ecco-branch)
2307    
2308    checkpoint50h_post
2309    o new package "land": provide surface BC for AIM.
2310    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2311    o AIM: use true log-P extrapolation for near surface temp (= as in
2312        F.Molteni paper) ; update aim.5l_cs output.
2313    o New variable in PARM03 for more flexible pickups
2314    o somewhat cleaned package initialisation sequence for
2315      ctrl/ cost/ ecco/ in packages_... routines
2316    
2317    checkpoint50g_post
2318    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2319      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2320      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2321        made the default because of faster convergence than ADI
2322    
2323    checkpoint50f_post
2324    o exf totally restructured
2325      - replaced all exf_set_ routines by one generic exf_set_gen.F
2326        and made sure it's still differentiable
2327      - split exf_getffields.F into new exf_bulkformulae.F
2328      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2329      - updated adjoint/makefile and relevant verif. accordingly
2330    
2331    checkpoint50f_pre
2332     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2333          + change Evap over land. (update aim.5l_cs output)
2334     o added missing .cvsignores and made uniform across expts
2335     o changed configuration of tidal_basin_2d expt
2336     o added pkg/debug functions for tracing code in fatal crashes
2337     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2338     o new fn in pkg/monitor to stop model if solution grows too big
2339     o removed lots of single quotes from comments
2340    
2341    checkpoint50e_post
2342    o make KPP work with PTRACERS
2343     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2344       nearly a copy of kpp_transport_s
2345     - there is no analogue to SurfaceTendencyS, so I have to use
2346       gPtr(of the surface layer) instead
2347    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2348    checkpoint50e_pre
2349    
2350    checkpoint50d_post
2351    o change kpp output from multiple-record state files to single-record state
2352      files analogous to write_state.F
2353    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2354      analogous to the cg2d-related output.
2355    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2356      so that writing to internal file fn (with length 512) fails.
2357    checkpoint50d_pre
2358    
2359    checkpoint50c_post
2360    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2361    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2362    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2363    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2364    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2365    
2366    checkpoint50c_pre
2367    Merging from release1_p13:
2368    o bug fix for pkg/seaice dynamic solver
2369    o Added SEAICE_initialHEFF to pkg/seaice
2370    
2371    checkpoint50b_post
2372    o store u*,v* in gU,V instead of in guNm1,gvNm1
2373    o in order to put the momForcing out of the Adams-Bashforth:
2374      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2375      to timestep.F
2376    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2377    o re-generate output for highly sensitive test-exp:
2378       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2379    
2380    checkpoint50b_pre
2381    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2382    o corrected CPP option mismatch in exf_Bulk... functions for case
2383      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2384    
2385    checkpoint50a_post
2386    o Bug fix for merging between c50 and KPP.
2387      ikey was passed from thermodynamics to kpp_calc via
2388      common block rather than being recomputed in kpp_calc,
2389      in contradiction with new key itdkey.
2390      New key ikppkey created, and tamc.h headers updated.
2391    
2392    checkpoint50
2393    - 2nd step of merge with ecco-branch:
2394      merge changes in ecco-branch back into main trunk
2395    - bug fix in find_alpha
2396    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2397    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2398    - merged some sliced AD support routines
2399    
2400    checkpoint49
2401    merged from ecco-branch:
2402    o exf:
2403      - Enable initialisation of forcing fields to constant
2404        (runtime) values.
2405      - in exf_getffields.F
2406        Reduce i-/j-loop to interior domain, discarding overlaps.
2407        That also fixes wrong TAF-key computations for key_1, key_2
2408        with bulf formulae.
2409      - exf_init.F modify #ifdef for exf_init_evap
2410      - exf_getffieldrec.F, ctrl_getrec.F
2411        The following INT-usages are not safe:
2412          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2413          fldcount = int(fldsecs/fldperiod) + 1
2414        and were modified.
2415    o autodiff: checkpoint_lev...
2416      - updated storing for bulk formulae (some arrays were missing)
2417      - added state for seaice package
2418      - synchronized with main branch
2419    o DIVA:
2420      Modif.s in
2421      - the_main_loop.F
2422      - the_model_main.F
2423      and added cost_final_restore.F cost_final_store.F
2424      o With these changes, it is possible to fully separate
2425        the first forward run to compute the cost function (mdthe_main_loop)
2426        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2427        into separate model executions.
2428        This enables better tuning of DIVA to given queue sizes.
2429      o Loss of cost function value in consecutive DIVA runs is
2430        fixed by storing to 'costfinal' file.
2431      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2432        beginning/end of adjoint integration is accounted for.
2433      The current changes apply to TAF-1.4.26.
2434      TAF has one remaining bug, requiring one manual change
2435      (see MITgcm manual).
2436    o cal: synchronized between MAIN and ecco-branch
2437    
2438    checkpoint48i_post
2439    o Changes to restore differentiability of code w.r.t. previous tag
2440      (mostly adding new routines to make list and replacing
2441      pressure by totPhiHyd).
2442    o Updated and merged grdchk package
2443      - has both ADM and TLM checks
2444      - works for single- and multi-proc.
2445      - output cleaned
2446      - worked successfully for parallel DIVA
2447    o genmake:
2448      - Adding -platform=SP4
2449      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2450    o Modif. for DIVA:
2451      ctrl_unpack should not be called in intermediate DIVA interval.
2452      (similar thing would apply for active files such as
2453      tbar, sbar, psbar, which should not be reinitialised;
2454      only relevant for ecco-branch)
2455    
2456    checkpoint48h_post
2457    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2458    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2459    o Added SEAICE_initialHEFF to pkg/seaice
2460    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2461    
2462    checkpoint48g_post
2463    --- EOS:
2464    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2465      store total Potential in totPhyHyd for diagnostics & EOS.
2466    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2467    --- Pressure/geopotential gradient:
2468    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2469    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2470      ( changes results of global_ocean_pressure )
2471    o NLFS + z-coord.: add eta*Rho' contribution.
2472    o accurate phiHyd when using interface-W at the middle between 2 centers
2473     ( changes results of ideal_2D_oce )
2474    o includes r* 2nd term in potential gradient.
2475    
2476    checkpoint48f_post
2477    Merging from release1_p12:
2478    o Modifications for using pkg/exf with pkg/seaice
2479      - improved description of the various forcing configurations
2480      - added basic radiation bulk formulae to pkg/exf
2481      - units/sign fix for evap computation in exf_getffields.F
2482      - updated verification/global_with_exf/results/output.txt
2483    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2484      (SBO) core products, including oceanic mass, center-of-mass,
2485      angular, and bottom pressure (see pkg/sbo/README.sbo).
2486    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2487      to avoid negative values in shallow regions.
2488      - updated verification/natl_box/results/output.txt
2489      - updated verification/lab_sea/results/output.txt
2490    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2491    o Added useSingleCpuIO option (see PARAMS.h).
2492    o Updated useSingleCpuIO option in mdsio_writefield.F to
2493      work with multi-field files, e.g., for single-file pickup.
2494    o pkg/seaice:
2495      - bug fix in growth.F: QNET for no shortwave case
2496      - added HeffFile for specifying initial sea-ice thickness
2497      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2498    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2499      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2500    o pkg/seaice:
2501      - adjoint-friendly modifications
2502      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2503    
2504    checkpoint48e_post
2505    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2506    o dynamics: change definition of computational domain & adapt mom_fluxform
2507      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2508    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2509        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2510        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2511        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2512        inverted_barometer solid-body.cs-32x32x1
2513      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2514    
2515    checkpoint48d_post
2516    o in preparation for r*:
2517     a) use pre-computed gradient of hydrostatic potential:
2518        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2519     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2520        => affects results of glob_oce_pressure (different truncation error)  
2521      update output.txt of ideal_2D_oce & global_ocean_pressure
2522    
2523    checkpoint48d_pre
2524    o in preparation for r*:
2525      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2526      pass the 2 comp. of the grad. as arguments to momentum S/R.
2527      but for the moment, only used if it does not change the results.
2528    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2529    
2530    checkpoint48c_post
2531    Modifications in treatment of initial flux forcing controls
2532    to avoid extra storing of flux fields.
2533    
2534    checkpoint48c_pre
2535    o Added tidal_basin_2d experiment (currently 1D!)
2536    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2537    
2538    checkpoint48b_post
2539    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2540     (modification to pressure gradient not yet implemented)
2541    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2542      (for U & V) that are used for vertical advection of momentum.
2543    
2544    checkpoint48a_post
2545    o In preparation for r*, use temp. array to compute vertical transport
2546       in flux-form momentum pkg. => change results of few test-exp.
2547      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2548                        lab_sea, natl_box & plume_on_slope
2549    
2550    checkpoint48
2551    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2552    
2553    checkpoint47j_post
2554    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2555    o moved adexch from forward_step to addummy_in_stepping
2556    o added exch in ctrl_map_...
2557    o aveFreq.=0. at end of cost_final to avoid overwrite in
2558      reverse checkpointing loop
2559    o Yet more changes in gmredi:
2560      * adgmredi_calc_tensor
2561        avoiding all recomputation of gmredi_slope_limit
2562      * adgmredi_x/y/rtransport
2563        added flag for excessive storing to avoid recomp. of
2564        u/v/rtans, dTdx/y/z
2565        -> this is not really necessary and very memory-consuming
2566      * adgmredi_slope_psi:
2567        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2568      * gmredi_slope_limit
2569        re-activated full calculation of taperfct for case 'ac02'
2570    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2571    
2572    checkpoint47i_post
2573    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2574    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2575      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2576    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2577    o gmredi: fix few bugs.
2578    
2579    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2580    This will be a good checkpoint to plug into the ecco-branch.
2581    o few modif.'s to get latest version adjointed
2582      (mainly kick out code in ini_linear_phisurf)
2583    o modif's to run adjoint with exactConserv
2584    o case GM_BOLUS_ADVEC should be cleaned
2585      S/R gmredi_slope_psi should be cleaned
2586    o verification/carbon now has exactConserv=.TRUE.
2587    
2588    checkpoint47g_post
2589    o time-average AIM output: becomes independent from statvars time-average
2590      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2591    o After TAF bug fix:
2592      Tested adjoint of gmredi package.
2593      Tests were done with checkpoint47 rather than with latest
2594      checkpoint47f_post since the latter is broken for the adjoint
2595      verification/carbon/ contains both ADM and TLM gradient checks.
2596    Here they are, before they get changed/lost/stolen.
2597    Mostly modif.'s to fix numerical sensitivities.
2598    Gradient checks OK for
2599    - GM_taper_scheme:
2600      * clipping
2601      * ac02
2602      * linear
2603      * glw91
2604      * dm95
2605      * ldd97
2606    - GMREDI_OPTIONS:
2607      * GM_VISBECK_VARIABLE_K
2608      * GM_NON_UNITY_DIAGONAL
2609      * GM_EXTRA_DIAGONAL
2610      * GM_BOLUS_ADVEC
2611    in conjunction with data.gmredi parameters to be checked in
2612    in a few minutes under verification/carbon/code/
2613    
2614    checkpoint47f_post
2615    Merging from release1_p10:
2616    o modifications for using pkg/exf with pkg/seaice
2617      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2618        and SEAICE_EXTERNAL_FLUXES
2619      - pkg/exf CPP options EXF_READ_EVAP and
2620        EXF_NO_BULK_COMPUTATIONS
2621      - usage examples are Experiments 8 and 9 in
2622        verification/lab_sea/README
2623      - verification/lab_sea default experiment now uses
2624        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2625    
2626    checkpoint47e_post
2627    o created a tag prior to creating a branch
2628    
2629    checkpoint47d_post
2630    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2631      at the bottom boundary had an erroneous half slip boundary condition
2632    o added bottom drag and no slip boundary condition capabilities to
2633      oceanic pressure coordinates code
2634    o added new verification experiment global_ocean_pressure, this experiment is
2635      also described in the tutorial section of the manual
2636    checkpoint47d_pre
2637    
2638    checkpoint47c_post
2639    o Added a verification experiment for a global cubed-sphere ocean run
2640      -  verification/global_ocean.cubed32x32x30
2641      -  uses pkg/therm_seaice and pkg/bulk_forcing
2642    
2643    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2644    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2645      when using P-coordinate; only implemented for atmospheric config.
2646    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2647      NOTES: requires option NONLIN_FRSURF to be "#define".
2648    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2649    
2650    checkpoint47b_post
2651    Merging from release1_p9:
2652    o pkg/seaice
2653      - removed GOTO's and added taf directives
2654      - double precision constants to reduce the g77 (Linux)
2655        to F77 (SGI) differences reported in release1_p8
2656    o tools/genmake
2657      - added SGI options
2658    o verification/testscript
2659      - updated to that of checkpoint47a_post
2660    o verification/global_ocean.90x40x15/input/eedata
2661      - modified for SGI f77 compatibility
2662    o verification/lab_sea
2663      - added description of sea-ice model
2664      - added missing matlab routines
2665      - added test of thermodynamics parallelization
2666    
2667    checkpoint47a_post
2668    o new pkg: aim_v23
2669     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2670       for now, keep the same surface forcing as before.
2671     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2672     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2673     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2674    o add diagnostic of surface correction term in monitor output
2675    
2676    o bulk_force and therm_seaice
2677    - Two packages:  bulk_force (Bulk forcing)
2678      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2679    - Earlier integration from Stephaine Dutkiewicz
2680      and Patrick Heimbach.
2681    - Two ifdef statements for compile time,
2682       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2683    
2684    checkpoint47
2685    differentiable version of checkpoint46n_post
2686    o bug fix in quasihydrostaticterms
2687    o * "clean" adjoint code (in terms of extensive recomputations)
2688        can now be obtained for all GMREDI options (i.e. for
2689        - GM_VISBECK_VARIABLE_K
2690        - GM_NON_UNITY_DIAGONAL
2691        - GM_EXTRA_DIAGONAL
2692        - GM_BOLUS_ADVEC )
2693      * However, wrong gradient check problem remains unsolved.
2694      * New CPP options have been introduced for different
2695        tapering schemes
2696    o external_fields_load now part of differentiation list
2697    o pressure needs multiple storing;
2698      would be nice to have store_pressure at beginning or
2699      end of forward_step, e.g. by having phiHyd global (5-dim.)
2700      (NB: pressure is needed for certain cases in find_rho,
2701      which is also invoked through convective_adjustment).
2702    o recomputations in find_rho for cases
2703     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2704    o #define ATMOSPHERIC_LOADING should be differentiable
2705    o ini_forcing shifted to begining of initialise_varia
2706    o Incorporating QNVS line search routines into MITgcm
2707      (this is separate code, and therefore not under pkg)
2708      lsopt/, optim/
2709    o Updated verification/carbon/
2710      - #define GM_VISBECK_VARIABLE_K
2711      - GM_taper_scheme    = 'ldd97'    
2712    
2713    checkpoint46n_post
2714    Merging from release1_p8:
2715    o verification/natl_box:
2716      updating new external_fields_load routine
2717    o New package: pkg/seaice
2718      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2719      The sea-ice code is based on Hibler (1979-1980).
2720      Two sea-ice dynamic solvers, ADI and LSR, are included.
2721      In addition to computing prognostic sea-ice variables and diagnosing
2722      the forcing/external data fields that drive the ocean model,
2723      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2724      The implied surface heat flux is then stored in variable
2725      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2726      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2727      non-local transport term.  Because this call precedes model
2728      thermodynamics, temperature under sea-ice may not be "exactly" at
2729      the freezing point by the time theta is dumped or time-averaged.
2730      N.B.: fairly large differences in accuracy occur across
2731            different platforms/compilers; comparison between
2732            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2733            generated output gives:
2734       T           S           U           V
2735      C D M    c        m  s        m  s        m  s        m  s
2736      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2737      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2738      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2739    
2740      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2741    o GAD:
2742      - generated new common blocks to account for call of
2743        same gad routines with differing traceridentities
2744        (needed to modify tracerIdentity indices in GAD.h)
2745      - generated separate common blocks for case useCubedSphereExchange
2746        (Department of Futurology)
2747      - parameter lists to gmredi_?transport: added tracerIdentity
2748      - added new key indices to tamc.h
2749    o external_fields_load:
2750      - added this routine to TAF list
2751      - needed to make some common blocks global and additional storing
2752        along the same lines as exf package (checkpoint_lev?_directives.h)
2753    o exf:
2754      updated external forcing package
2755      - bug fixes carried over from ecco-branch
2756        (missing OBCS_OPTIONS.h in two routines)
2757      - enable easy to use "no forcing".
2758      - added exf I/O for atmospheric loading
2759      - added exf I/O for runoff data
2760      - transfered scaling between exf <-> MITgcm to exf namelist
2761    o Adding new verification experiment global_with_exf.
2762      This verification experiment is almost identical to the
2763      global_ocean.90x40x15 experiment, except that it uses
2764      the exf (and cal) package instead of the
2765      external_fields_load routine (cf README file).
2766    
2767    checkpoint46m_post
2768    o modified testscript to return -- when there are no lines of "%MON" output
2769    o added new flag "quasiHydrostatic" for QH mode
2770      and new routine quasihydrostaticterms()
2771    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2772      New routine: mom_u_coriolis_nh()
2773    o fixed sign of non-hydrostatic metric terms in u and v equations.
2774      Depend on correct sign of gravitySign.
2775    o added work.pc* to .cvsignore in aim directories using ifc
2776    o introduced flag for controllin non-hydrostatic metric terms
2777    o removed gravitySign from PARM04
2778    o switched to g77/ifc from pgf77 in aim experiments
2779    
2780    checkpoint46l_post
2781    o made convective adjustment work with pressure coordinates:
2782     - changed the direction of k-loop in convective_adjustment.F for the
2783       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2784     - adjusted the reference pressure k-index in convective_adjustment.F
2785     - adjusted the convection condition in convect.F (in analogy to
2786       calc_ivdc.F)
2787     - convective_adjustment no longer computes anything on the halos
2788     - removed the warnings about negative salinity from find_rho.F and
2789       find_alpha.F; instead the new routine look_for_neg_salinity, called
2790       at the beginning of find_rho, find_alpha, and find_beta, does a
2791       check of the entire slice, if CPP-option
2792       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2793    checkpoint46l_pre
2794    
2795    checkpoint46k_post
2796    o fixed the verification/global_ocean.90x40x15 experiment:
2797     - new bathymetry (the world according to A., JMC, and M.)
2798     - new initial fields and forcing fields (*.bin files)
2799     - new POLY3.COEFFS (for the next release one should switch to a full
2800       equation of state: JMD95P or MDJWF)
2801     - fixed several errors and redundancies in the data file
2802     - experiment uses looped cells
2803     - added matlab directory with diagnostic scripts for plotting of output
2804    
2805    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2806     - read AIM physics parameters from a file (data.aimphys)
2807     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2808    
2809    checkpoint46j_post
2810    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2811    o move wVel computation at the end of the time step, in S/R integr_continuity
2812    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2813    o update timeave pkg for wVel diagnostic.
2814    checkpoint46j_pre
2815    
2816    checkpoint46i_post
2817    o Clean up AIM package (and keep the results unchanged):
2818      include CPP_OPTION and use IMPLICT NONE in all routines ;
2819      declare all the variables _RL ; use _d 0 for all numerical constants.
2820      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2821    
2822    checkpoint46h_post
2823    o cleaned up the use of rhoNil and rhoConst.
2824      - rhoNil should only appear in the LINEAR equation of state, everywhere
2825        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2826        and the dynamical equations are all divided by rhoConst
2827    o introduced new parameter rhoConstFresh, a reference density of fresh
2828      water, to remove the fresh water flux's dependence on rhoNil. The default
2829      value is 999.8 kg/m^3
2830    o cleanup up external_forcing.F and external_forcing_surf.F
2831      - can now be used by both OCEANIC and OCEANICP
2832    checkpoint46h_pre
2833    
2834     Added code to convert surface volume flux (fresh water) into
2835     a mass flux when using P coordinates in the ocean (OCEANICP).
2836     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2837    
2838    checkpoint46g_post
2839    o Include a new diagnostic variable phiHydLow for the ocean model
2840      - in z-coordinates, it is the bottom pressure anomaly
2841      - in p-coordinates, it is the sea surface elevation
2842      - in both cases, these variable have global drift, reflecting the mass
2843        drift in z-coordinates and the volume drift in p-coordinates
2844      - included time averaging for phiHydLow, be aware of the drift!
2845    o depth-dependent computation of Bo_surf for pressure coordinates
2846      in the ocean (buoyancyRelation='OCEANICP')
2847      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2848        Theta, Salinity, and Pressure in the parameter list. This routine is
2849        presently contained in find_rho.F. This routine does not give the
2850        correct density for 'POLY3', which would be a z-dependent reference
2851        density.
2852    o cleaned up find_rho
2853      - removed obsolete 'eqn' from the parameter list.
2854    o added two new verification experiments: gop and goz
2855      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2856    checkpoint46g_pre
2857    
2858    checkpoint46f_post
2859    o Enable tangent linear (forward mode) gradient checks:
2860      - extended active file handling to g_... files
2861      - added TANGENT_SIMULATION to theSimulationMode
2862      - extended grdchk package accordingly
2863    o added tangent linear setup in verification/carbon/code_ftl
2864    o added adjoint setup in verification/front_relax/code_ad
2865    
2866    checkpoint46e_post
2867    o Added new equation of state -> MDJWF
2868      - EOS of McDougall et al., 2002, JAOT, submitted
2869      - caveat: the equation of state is only valid for a smaller (more
2870        realistic?) range of values than JMD95P/Z and UNESCO
2871      - added masks to the calculation of pressure in store_pressure
2872      - added more check values for density in check_eos (ini_eos.F), some of
2873        the old check values are out of the range of the MDJWF-eos, so don't
2874        expect perfect matches for those
2875    checkpoint46e_pre
2876    
2877    checkpoint46d_post
2878    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2879      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2880      case of pressure coordinates. eosType='JMD95Z' in
2881      combination with buoyancyRelation='OCEANICP' now causes an error.
2882    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2883      in find_alpha/beta.
2884    checkpoint46d_pre
2885    
2886    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2887      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2888    
2889    checkpoint46c_post
2890    o Changes necessary for ocean in p-coordinates
2891     -  Added new buoyancy relation = 'OCEANICP'
2892     -  Added new parameters = gravitySign (this used to be contained inside
2893        the factor dRdZ which I added when we first switched to R coordinates).
2894     X GM/Redi is not compatible (yet)
2895     X bottom drag and no-slip need to be debugged.
2896    checkpoint46c_pre
2897    
2898    checkpoint46b_post
2899    o Added new equation of state -> JMD95Z and JMD95P
2900      - EOS of Jackett and McDougall, 1995, JAOT
2901      - moved all EOS parameters into EOS.h
2902      - new routines ini_eos.F, store_pressure.F
2903    o Added UNESCO EOS, but not recommended because it requires
2904      in-situ temperature (see JMD95)
2905    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2906      unesco.f to be used with POLY3
2907    checkpoint46b_pre
2908    
2909    checkpoint46a_post
2910    o Added (atmospheric) pressure loading
2911      - new field in FFIELDS.h, etc...
2912      - new cpp flag ATMOSPHERIC_LOADING
2913    o Changed hFacC to _hFacC in calc_phi_hyd.F
2914    o Added SHORTWAVE_HEATING to some files for consistency
2915    checkpoint46a_pre
2916    
2917    checkpoint46
2918    further merges from release1_p5
2919    o new ctrl package
2920      - adopted from ECCO environment to enable optimization
2921      - added Eliassen Palm fluxes to controls
2922    o added Eliassen Palm flux controls to gradient check package
2923    o cost package
2924      - Compatible with new ctrl package
2925      - added Eliassen Palm cost hooks
2926      - modif's of existing cost functions
2927    o Adjoint-related bug fixes in kpp:
2928      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2929      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2930    o autodiff package
2931      - flow directives:
2932        + new for S/R do_the_model_io
2933        + enhanced for S/R checkpoint
2934        + new gmredi.flow
2935      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2936        disable adcommon.h/g_common.h by default.
2937      - fixed problem for adjoint of global_max
2938    o modified verification/carbon/
2939    o New setup for adjoint of global_ocean
2940    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2941    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2942    o incorporated hooks for sponge layer code (external_forcing.F)
2943    
2944    checkpoint45d_post
2945    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2946    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2947      (affects plume_on_slope "cg2d" output)
2948    o add new parameter deltaTfreesurf for free-surface time stepping
2949    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2950    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2951    o change phiMin in exp1 (to agree with documentation)
2952    o add new flags:
2953     - T,S forcing inside/outside Adams-Bashforth
2954     - turn off temp,salt advection and/or forcing
2955     - for each tracer, define internal flag for multiDimAdvection & A-B
2956    o monitor: change definition of KE to check conservation of Energy
2957    
2958    checkpoint45c_post
2959    o Removed f90 comments ("!")
2960    o Modified initialisations to enable exf package for MITgcm
2961      (without invoking ECCO_PACKAGE).
2962    o modifications to gradient check package (Martin Losch)
2963      - enable centered differences
2964      - modified format of standard output
2965    
2966    checkpoint45b_post
2967    o cleaned exchange calls in cg2d
2968    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2969    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2970      to configure barotropic setup (Martin Losch)
2971    o moved some initialisations within bi,bj loop in dynamics
2972      (TAF flow dependency)
2973    o in initialise_varia, moved call packages_init_variables
2974      before convective_adjustment_init
2975      (corresponding adjustment of TAF tape initialisation).
2976    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2977    
2978    checkpoint45a_post
2979    o compute Rho over the whole domain (extend iMin,jMin indices)
2980    o specific exchange for X-slice domain (case Ny=1)
2981    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2982    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2983    
2984    checkpoint44h_post = checkpoint45
2985    o Fix to restore differentiability:
2986      place at which packages_init_variables is called in
2987      initialise_varia is crucial for reverse control flow.
2988    o modifications in GMRedi to enable stable adjoint
2989      (corresponding modif's in thermodynamics, dynamics)
2990    o added missing hook for sponge layer code in external_forcing
2991    o modified test cost functions
2992    o storing in gad_advection (plus removal of write(0,*)!
2993    o missing headers TR1.h added in convective_adjustment routines
2994    o errorMessageUnit set non-equal zero in eeboot
2995      (conflict on some platforms, e.g. IBM SP3)
2996    o modified carbon verif.
2997    
2998    checkpoint44h_pre
2999    o vertical grid option: allow to put the Interface at the middle between
3000      2 cell-centers ; replace delZ in pkg/kpp by drF.
3001    o GM Advective form: Tracers are advected using the residual transport (=
3002      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3003    
3004    checkpoint44g_post
3005    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3006      results) ; ifdef missing in thermodynamics.F
3007    
3008    checkpoint44f_pre,checkpoint44f_post
3009    o added PTRACERS package
3010      This allows an arbitrary number of passive tracers to be integrated
3011      forward simultaneously with the dynamicaly model.
3012      + Implemented so far:
3013        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3014        - I/O and checkpointing
3015        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3016      + Not implemented so far:
3017        - KPP
3018        - OBCS
3019      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3020        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3021        line in data.pkg.
3022      + This package is disabled by default since it increases storage.
3023    
3024    
3025    o testscript: added -cleanup option
3026    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3027                 b) enable to filter 2D fields.
3028    
3029    checkpoint44e_pre,post
3030    o re-wrote convective adjustment to use pre-calculated weights
3031      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3032      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3033      Original calls to convect() still in place.
3034    
3035    chkpt44d_pre,post
3036    o added missing EXCLUDE_MONITOR flags
3037    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3038      (incompatible typ in MIN/MAX expressions caused problems
3039      on IBM SP3)
3040    o in genmake added variable MAKEDEPEND
3041      plus resetting for case SunOS
3042    o added timer_stats.c routine for IBM SP3
3043    o removed variables in dynamics
3044    !!! I forgot to create tag chkpt44d_pre !!!
3045    !!! But chkpt44d_pre = chkpt44c_post    !!!
3046    
3047    o real fresh water flux implemented with non-linear free-surface.
3048    
3049    chkpt44c_pre,post
3050    o few fix (mask in shap_s2, EmPmR in external_field_load,
3051      USE_NATURAL_BCS in solve_for_P);
3052    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3053    
3054    checkpoint44b_pre/_post
3055    o merge of relevant stuff from the ecco-branch:
3056      - genmake: removed $S64 overwrite for case SunOS
3057      - pkg/exf: update and corrections for field swapping and obcs
3058      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3059                  harmonized between ECCO and MITgcm
3060      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3061                      updated checkpointing_lev... lists for obcs
3062      - model/src: minor changes in forward_step, plot_field
3063                   added directive for divided adjoint in the_main_loop
3064      - pkg/mdsio: added mdsio_gl_slice
3065    
3066    o check parameters & config (chkpt44a_pre,post)
3067    o OBC and NonLin_FrSurf.
3068    
3069    checkpoint44
3070    o fix bug in mom_vi_del2uv
3071    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3072    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3073    o update AIM experiments (NCEP input files)
3074    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3075    o added some stuff for AD
3076    
3077    checkpoint43
3078    o added two new advection tests
3079    o added global 4x4 degree ocean test
3080    o added test of H&S94 with free surface on cube
3081    o some final mods for gradient check, adjoint,...
3082    
3083    checkpoint42
3084      Fixed AD-related problems:
3085    o Store directives up-to-date with re-arranged Adams-Bashforth
3086      (mainly thermodynamics.F)
3087    o New store directives for multi-dim. advection schemes
3088      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3089      * new common block and key passkey
3090      (mainly gad_advection.F)
3091    o Modified store directives for split of dynamics/thermodynamics
3092      for the case ALLOW_KPP
3093    o Cleaned argument list for timestep_tracer.F
3094    
3095    checkpoint41
3096    o re-formatted/added comments in prologues of key subroutines
3097      to work with protex
3098    
3099    checkpoint40
3100    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3101    o added FLT (floats) package from Arne along with demo. experiment
3102    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3103      implementation of forward-in-time forcing terms
3104    o more mods for non-linear free-surface including new variable
3105    o modified multi-dim method to work on cube
3106    o bug fix in KPP (from DM)
3107    
3108    checkpoint40pre9
3109    o added DST advection schemes
3110    o fix MPI bug on SGI's
3111    o modifications for non-linear free-surface
3112    o fixed conditionals for fixed flow/passive tracer only mode
3113    o added tension/strain form of stress tensor
3114    o changes to commenting of arguments for TAF/TAMC
3115    o added/updated many matlab scripts
3116    o added multi-dimensional advection method for tracers
3117      
3118    checkpoint40pre8
3119    o new package rw/
3120      Added method for dumping intermediate local arrays:
3121      mdsio_writetile - same as mdsio_writefield except works from inside
3122                        bi,bj loop
3123      mdsio_writelocal - same as mdsio_writetile except works for local
3124                         arrays
3125      write_local_r? - higher-level wrapper for mdsio_writelocal
3126      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3127      Example given at end of mom_vecinv.F that dumps some local arrays.
3128    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3129      control flux-form versus vector invariant code.
3130      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3131      or genmake -DISABLE ...
3132    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3133      (additional storing is now needed for case vecinv;
3134      currently nothing implemented to switch this storing off
3135      in case fluxform is used since no CPP flag available).
3136    
3137    checkpoint40pre7
3138    o bug fix in dynamics.F
3139      calc_viscosity called before k=1,Nr loop.
3140    o added some #ifdef's ALLOW_PASSIVE_TRACER
3141    o cleaned initialisations in ctrl_map_ini
3142      related to TAF
3143    
3144    checkpoint40pre6
3145    o split dynamics into thermodynamics & dynamics
3146    o corresponding split of calc_diffusivity into
3147      calc_diffusivity, calc_viscosity
3148      (kpp_calc_diff, kpp_calc_visc).
3149    o Added diffkr, kapgm to control variables
3150    o bug fix in gmredi_slope_limit for ldd97
3151    
3152    checkpoint40pre5
3153    o proper initialization of Adams-Bashforth time stepping
3154      + uses forward step for very first step of model (iter=0)
3155    o re-generated *all* output since almost all output is modified by this
3156      change (sorry but we've been putting this one off for about 2 years)
3157      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3158        *not* regenerated since they are already out of date and I don't
3159        want to create the impression that they are suddenly working.
3160    o removed KAP stuff for DEC's
3161    o modified/added many .cvsignore files in */code and */input
3162    o added new expt "solid-body.cs-32x32x1"
3163      + this uses an alternative form of ini_curvilinear_grid.F which
3164        is not necessarily any better than the current one...
3165    
3166    checkpoint40pre4
3167    o added re-initialisations of utrans,vtrans,rtrans in
3168      calc_common_factors which are crucial for TAF.
3169    o extended iMin,jMin range for calc_common_factors,
3170      calc_diffusivity
3171    o added option ALLOW_PASSIVE_TRACER
3172    o a few minor updates and fixes
3173    
3174    checkpoint40pre3
3175    o created calc_gtr1.F for gad package
3176    o split the_main_loop and re-introduced forward_step
3177    o some recomputations of nIter0 for TAMC
3178    
3179    checkpoint40pre2
3180    o Updated to latest branch of AJA, JMC
3181    o Added gradient check package
3182    o Added routines for passive tracer handling
3183    o Added carbon sequestration sensitivity experiment
3184    
3185    checkpoint39
3186     o Modifications and fixes to support TAMC
3187       (mainly missing or wrong directives)
3188     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3189       in addummy_in_stepping
3190     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3191     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3192     o Included following packages:
3193       cal: calendar
3194       exf: external forcing
3195       ecco: essential routines to control use of cal, exf
3196             (NB: this is not the full ECCO environment)
3197     o disabled some packages by default in genmake
3198    
3199    checkpoint38
3200     o see notes_c37_adj.txt
3201     o corrected wrong layer index in external_forcing_t
3202     o replaced the_main_loop/forward_step by the_main_loop
3203     o removed forceoutput from write_state
3204       (replaced criteria for initial/final state)
3205     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
3206    
3207    checkpoint37
3208     o mdsio.F routine split and packaged in pkg/mdsio
3209       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
3210        used unless genmake -disable=mdsio)
3211     o allow a more precise surface-geopotential gradient for the atmosphere
3212       taking into account the change in space of Alpha (=1/rho) at the surface.
3213     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
3214       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
3215     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
3216       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
3217       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
3218     o Time-Average diagnostics defined as a pseudo package "timeave".
3219     o pickup files : old pickup (before c35) did not work with new code (c35
3220       and after) unless activating 2 commented lines in initialise-varia.
3221     o Non-Hydrostatic pickup file Pb fixed.
3222     o bug with Rigid-lid version (since c35) fixed.  
3223    
3224    checkpoint36
3225     o implement Crank-Nickelson barotropic time-stepping
3226     o recover Time-Average diagnostics
3227     o fix Pb in checkpoint (PR#19)
3228     o AIM become a standard package ; clean unused CPP_kees
3229    
3230    checkpoint35
3231     o subtantial rewrite of dynamics.f
3232     o allows staggered time-stepping
3233     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
3234     o added bottom drag (linear + quadratic)
3235    
3236    checkpoint34
3237     o Modified exchange routines for correct reverse simulation.
3238     o Added verification output to comply with bug fix in impldiff.F
3239       as of c33 (exp2, natl_box).
3240     o Corrected store directives in dynamics.F
3241     o Corrected array boundaries in impldiff.F
3242     o Corrected array dimensions in gmredi.
3243       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
3244     o Added routine GLOBAL_SUM_INT to global_sum.F
3245     o Added mdsio_gl.F for ECCO purposes.
3246    
3247    checkpoint33
3248     o Fixed bug in lower BC in impldiff.F
3249     o Fixed confusion about units of forcing arrays in FFIELDS.h
3250       namely Fu,Fv,Qnet,Qsw,EmPmR:
3251       - Removed verification/natl_box/code/external_fields_scale.F
3252         (did not differ from that in model/src)
3253       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
3254         (see FFIELDS.h for description)
3255       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
3256         kpp_calc.F and kpp_transport_t.F
3257       - Removed model/src/external_fields_scale.F and calls to it
3258       - verification/natl_box uses flux data with "atmospheric" sign so
3259         a special version of external_fields_load.F is used to
3260         change the data as it's read in. This way, the arrays
3261         have the right units and signs at all times tha a user could
3262         possibly use them.
3263     o Corrected genmake to delete a temporary file during configuration
3264    
3265    checkpoint32
3266     o Scaling of forcing fields moved from external_forcing.F to
3267       external_fields_scale.F, called directly after loading fields.
3268     o Surface relaxation terms added to surface tendency fields in
3269       extra subroutine.
3270     o impldiff.F changed to avoid storing by TAMC of huge intermediate
3271       fields.
3272     o Changes in GMRedi to comply with packaging structure.
3273     o Modifications and bug fixes in KPP package.
3274     o Verification experiment for KPP added (verification/nat_box/)
3275    
3276    checkpoint31
3277     o Packages interface brought in line with defined standard
3278       -> new routines packages_...F
3279       -> changes in initialise_fixed.F, initialise_varia.F
3280       -> enables initialisation interface for ECCO package
3281     o Rescaling of external forcing fields immediately after read
3282       (removed from external_forcing.F)
3283       -> new: surface_fields_scale.F
3284       -> affects ini_foorcing.F, external_fields_load.F
3285     o Computation of surface tendencies before tendency updates.
3286       -> new: external_forcing_surf.F
3287     o Change of variable names useGMRedi, useKPP, useECCO
3288     o Further changes in dynamics.F, impldiff.F for TAMC
3289     o Tested for experiments 0, 2, 4.
3290       - not yet tested for GMRedi.
3291       - not yet tested for KPP.
3292    
3293    checkpoint30
3294     o Updates for OBCs
3295     o New experiment for test OBCs (internal_wave)
3296     o New output.txt in verification/exp4/results/
3297     o Updates for KPP: calculation of viscosity corrected, new variables
3298       kpp_dumpFreq and kpp_taveFreq
3299     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
3300       and entry for T90 in genmake
3301    
3302    checkpoint29
3303     o packaged KPP and GM/Redi
3304    
3305    checkpoint28
3306     o Corrected initialization of hFacMin for difference vertical coordinates
3307     o Modified calculation of partial cell thickness to more robust algorithm
3308     o config_summary.F: replaced write_1D_... by write_0D_...
3309       read_write.F: added subroutines write_0D_...
3310     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
3311       included some initialisations required for TAMC.
3312     o routine calc_isoslopes: modified sqrt computation to make it
3313       differentiable for zero argument.
3314     o routines dynamics, impldiff:
3315       included store directives and tape key computations required for TAMC.
3316     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
3317    
3318    checkpoint27
3319     o fixed calc_isoslopes() to so that cancellation of terms in tensor
3320       formulation works properly with variable resolution.
3321     o restructured the calling tree between the_model_main() and dynamics()
3322     o split initialise() into initialise_fixed() and initialise_varia()
3323     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
3324       in new routine ini_psurf()
3325    
3326    checkpoint26
3327     o moved some #ifdef in optional routines to encompass everything
3328       except the argument declarations. This was using up some memory.
3329     o fixed macros like _ADT to work with both versions of Linux cpp
3330     o cleaned up some unused and uninitialized variables
3331       (helps when debugging with strict compile options)
3332     o split up CPP_EEOPTIONS.h into options and macros
3333       (macros are now in eesupp/inc/CPP_EEMACROS.h)
3334     o patch for 2 processor JAM mode
3335    
3336    checkpoint25
3337     o updates for OBCs and NH
3338     o dramatically reduced memory usage
3339     o added "JAM" routines for use on Artic network
3340     o parameterization of convection by implicit vertical diffusion
3341     o added a diagnostic of convective index
3342     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
3343       (this is was partly for OBCs and NH but also in anticipation of
3344        an explicit free-surface option)
3345     o initial state input files for U and V
3346    
3347    checkpoint24
3348     o Removed some spurious "REAL"s
3349     o Updated KPP to latest version from JPL
3350     o Added a COS(latitude) in horizontal viscosity
3351    
3352    checkpoint23
3353     o Added del^4 diffusion for salt and temperature
3354     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
3355    
3356    checkpoint22
3357     o Made many small changes: implicit none, format(i5), etc...
3358     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
3359    
3360    checkpoint21
3361     o Introduced new I/O package that supports direct-access records (mdsio.F)
3362     o Split-up mid-level I/O routines
3363     o Updated input data for experiments 0,1,2,4 and 5
3364     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
3365    
3366    checkpoint20
3367     o Tidied up open-boundaries some more
3368     o Added non-hydrostatic code
3369     o Fixed some input data
3370     o Modified MPI start-up to work in "coupled" context.
3371    
3372    checkpoint19
3373     o Tidied up directory structure for verification experiments.
3374     o Added new code for open boundaries.
3375     o Corrected advective terms near boundaries.
3376     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
3377     o Implemented free-slip/no-slip BCs and del^4 dissipation.
3378     o Split default parameters out of ini_parms.F into set_defaults.F.
3379    
3380    checkpoint18
3381     o Further changes for optional code generation with
3382       CPP - ugh!
3383    
3384    checkpoint17
3385     o Beginning to incorporating modularity
3386       for supporting atmos. and ocean configs.
3387     o Small changes for TAMC complinace
3388     o New ultra simple test case. Barotropic box
3389       configuration "exp0".
3390    
3391    checkpoint16
3392     o Minor changes to exchange routines to support
3393       accumulation in reverse mode. Adjoint of an
3394       assignment is an addition.
3395     o Changes to support compilation by TAMC (LR(1)
3396       syntax) and by g77 under Linux ( 72 character
3397       limit ).
3398    
3399  checkpoint15  checkpoint15
3400   Rewrote exchange routines to allow   Rewrote exchange routines to allow
3401   o General tile <-> tile connectivity.   o General tile <-> tile connectivity.

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