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revision 1.26 by adcroft, Mon Apr 10 14:41:52 2000 UTC revision 1.821 by jmc, Thu May 24 23:10:12 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 change calculation of Visbeck K:
8      - no longer depend on tapering scheme; instead, compute slope (limited
9        by GM_maxSlope). this is equivalent to what was comuted before with
10        clipping or linear tappering.
11      - fix vertical averaging (wrong by 1 level)
12      - leave the old version (but will not be maintained) within
13        #ifdef OLD_VISBECK_CALC / #endif
14    o change error catch in calc_r_star to improve vectorization
15    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
16      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
17    
18    checkpoint59b
19    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
20      - export/import (between ocean & coupler) fields needed for ocean DIC.
21    o pkg/seaice:
22      - get rid of three more exchanges seaice_calc_viscosities (required
23        different loop boundaries in seaice_lsr and seaice_ocean_stress)
24      - bug fix in seaice_ocean_stress (update of lab_sea required)
25      - reduce loop boundaries to necessary minimum also in seaice_evp
26      - go back to the old way of computing deltaC/Z as the adjoint likes that
27        better
28    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
29      passive tracer to an Age Tracer) + update output.txt
30    o pkg/exf:
31      - implement A-grid / C-grid selection for wind-stress input files.
32      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
33      for now, in exf_bulk_largeyeager04.F only :
34      - change implementation for case where windspeed + 2. components wind-stress
35        are read-in. AND use rhoConstFresh to convert evap.
36    o pkg/seaice:
37      - use correct EXCH_UV for wind-forcing (on A-grid).
38      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
39        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
40    o pkg/exf:
41      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
42      EXF_INTERPOLATION:
43      - merge global_with_exf/code version of exf_interp_read.F
44        to the main code ;
45      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
46        reading the file ; Important: This options needs to be defined to recover
47        previous code.
48        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
49      - no longer loose real*8 precision along the way when using exf_iprec=64.
50    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
51      - change discretisation of evp-solver in order to avoid another exchange
52        (changes lab_sea) and clean up a little
53      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
54        help the adjoint (this also changes the results slightly)
55      - add a few "_d 0" where they had been missing in seaice_evp.F
56      - cleaning up: remove unused seaice_calc_rhs.F
57    o pkg/exf: some cleaning-up:
58      - change various "constants" into runtime parameters
59      - cleaned-up Large&Yeager04 routine which should eventually
60        replace exf_bulkformulae.F (changed names of S/R and CPP)
61        and merged various ALLOW_ATM_WIND options
62     only used with thsice pkg (in thsice_get_exf.F):
63      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
64        which are used when useStabilityFct_overIce=TRUE (= the default)
65      - change default values of ice & snow emissivity and scale downward LW
66        by ice & snow emissivity.
67    o pkg/thsice:
68     fix few little problems, in thsice_calc_thickn.F:
69      - growth vertically (and not laterally) if iceFrac == iceMaskMax
70      - melt laterally only if hIce < hThinIce (as the comments say)
71      and in thsice_extend.F:
72      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
73      - start to form ice as soon as the minimum ice-volume is reachable.
74     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
75      and cpl_aim+ocn
76    o pkg/kpp
77     - move computation of surface related input fields to KPP into a new
78       subroutine kpp_forcing_surf.F
79     - remove wrong (within bi,bj loops) EXCH calls.
80     - little cleaning (add argument myThid in last position, cvs header ...)
81     - for now, fix conservation problem by exchanging KPPviscAz (may not
82       be the best fix)
83    o pkg/seaice
84     - check for inconsistent evp parameter/cpp-flag combination
85     - remove leftover errIO flat for obsolete name list error handling
86    o OpenAD
87     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
88    
89    checkpoint59a
90    o pkg/seaice: some parameter clarifications and a little bit of clean up
91    o pkg/thsice: rename run-time parameters:
92       himin       -> hIceMin
93       himin0      -> hThinIce
94       hihig       -> hThickIce
95       i0          -> i0swFrac
96       transCoef   -> bMeltCoef
97       frac_energy -> fracMelting
98      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
99       with default values (for now) that do not change the results.
100      remove old version of thsice vars advection in pkg/seaice.
101    o in FFIELDS.h:
102      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
103      - make pLoad & sIceLoad always available (but still only used if
104         ATMOSPHERIC_LOADING is #define).
105    o pkg/kpp: replaced _KPP_RL with _RL
106    o bug fixes for vertical diffusivity computations when both KPP and
107        3D diffusivity arrays are used.
108    o pkg/seaice: fix bug in evp solver, while doing that
109      - change (improve?) discretization of stress computations for both
110        cgrid-lsr and evp solver
111      - add a new routine to compute strain rates
112      - the above changes lab_sea results
113      - add no slip conditions for evp solver (off by default), lsr-version
114        may follow
115      - fix exchange for shear at Z-points (does not change lab_sea)
116      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
117        (to force the user to pick a time step since there is not "safe" way
118        of choosing it)
119      - add principal stress diagnostics
120      - rearrange fields for evp a little to avoid having to call a: too many
121        exchanges and b: exchanges for stress trensor components which we do
122        not have.
123      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
124        of evp, complete rewrite for lsr case (latter is does not yet work
125        in all cases)
126    o pkg/kpp: add code to have mixing in shelf ice caverns
127      - add myThid to all kpp routines (long overdue)
128    
129    checkpoint59
130    o pkg/exf:
131      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
132        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
133      - move exf header files from lower_case.h to UPPER_CASE.h ;
134        add missing cvs Header & Name
135      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
136      - add namelist param. selectStressGridPosition, exf_monFreq
137      - retire many _CLIM routines, and remove data.exf_clim
138        + params moved to data.exf
139        + climsst, climsss now handled by exf_set_gen, i.e.
140          climss?period=0 refers to constant field,
141          climss?period=-12 to monthly forcing
142      - split up namelists in data.exf
143    o pkg/seaice:
144      - remove seaice_exch and seaice_exch_uv
145      - remove superfluous exchange of theta
146      - add myThid to seaice_budget_ocean/ice
147      - add new interface for atmospheric wind forcing (C-grid only)
148        + new routine
149        + two new field (taux, tauy for stress over ice)
150        + removed one global field (DAIRN) for C-grid case only
151    o pkg/thsise
152      - 2nd set of modifs for thsice adjoint in conjunction with exf
153    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
154    
155    checkpoint58y_post
156    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
157      vertical diffusivity, similar to that in MOM4; turned on using
158      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
159      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
160    o Added capability for 3D specification of background vertical diffusion
161      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
162      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
163      "data" file that contains the 3D vertical diffusivity coefficients.
164    o ice dynamics (pkg/seaice) with thsice thermodynamics:
165      - add code within pkg thsice to advect & diffuse sea-ice fields
166      similar to (and will replace) what has been added in  seaice_advdiff.F,
167      but: - conserving Mass, Heat & Salt.
168           - better when using non-linear advection scheme (not yet fully tested)
169           - can also be used in atmospheric set-up (for now, only the diffusion).
170    
171    checkpoint58x_post
172    o IO option for global-file compact format:
173      - add options when generating topology (utils/exch2/matlab-topology-generator)
174      - add I/O capability (pkg/mdsio).
175      - adapt utils/matlab/rdmds.m to read this format.
176      for now long-line format not yet supported by pkg/mdsio (& exch2).
177    o shelfice: add a few diagnostics
178    
179    checkpoint58w_post
180    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
181      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
182      (and replace horiVertRatio in NH code).
183      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
184                         and tutorial_plume_on_slope (sensitive to truncation)
185    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
186      directly to drive seaice model (C-grid only)
187    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
188     - reintroduce computation of wind from stress,
189     - compute tau (in exf_bulkformulae.F) from windstress averaged to
190       mass points to avoid tau = 0
191     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
192    o rdmnc.m: make it work with "global" files created with gluemnc
193    o rdmnc.m : some improvements in dealing with singleton dimension
194      (tested on all testreport mnc output files).
195    o genmake2: disable pkg/profiles if netcdf test fails.
196    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
197    o move call to cal_readparms up to make calendar parameters/variable available
198      to all packages
199    
200    checkpoint58v_post
201    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
202      useDynP_inEos_Zc tested.
203    o pkg/exf: changes to properly interpolate/mask/scale initial fields
204    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
205      and portions thereof.  See read_cs.txt for description and examples.
206    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
207      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
208      following the great-circle arc between those 2 points.
209    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
210      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
211    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
212     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
213     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
214     - still needs work (not working with some options ; efficiency to improve)
215       and serious testing.
216     - use this scheme for temperature & salinity in 2 advection test exp.:
217       advect_xy & advect_xz, respectively.
218    
219    checkpoint58u_post
220    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
221    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
222    o testreport: add option "-skipdir" to skip some test.
223    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
224      momentum calculation.
225    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
226    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
227      remove checkpoint.F and the_correction_step.F (no longer used);
228      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
229    o add option (linFSConserveTr) to correct for tracer source/sink due to
230      Linear Free surface
231    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
232    o pkg/thsice: fix reading mnc-pickups
233    
234    checkpoint58t_post
235    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
236    o pkg/mdsio:
237     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
238       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
239       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
240     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
241     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
242       either MDS_READ_FIELD or MDS_WRITE_FIELD )
243     - new S/R (to replace MDSWRITEMETA), which allows to write more
244       informations (variable names, time ...) to meta files.
245     - modify rdmds.m to give back the meta file content.
246    o pkg/diagnostics: change vertical interpolation to be safer, and more
247       flexible (define p-levels to interpolate to in data.diagnostics);
248      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
249       diagnostic pointer.
250    o pkg/seaice: more cleaning up of seaice_growth, added many comments
251    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
252    o fix multi-category seaice:
253     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
254       SEAICE_MULTICATEGORY
255     - fix short wave heat flux
256    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
257       and allow to use EVP solver. Change forward lab_sea: test both EVP
258       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
259    o Initial check-in of lab_sea adjoint
260      (very similar to natl_box_adjoint/code_seaice)
261      * used C-grid and EVP solver
262      * used KPP, GM/Redi
263      * uses inAdExact=.TRUE.
264      * gradient checks fail for both ADM and TLM
265        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
266        f.d. gradients actually seem more problematic than ADM, TLM gradients;
267        issue is related to forward mismatch between g77 an ifort
268    o pkg/seaice: overhaul of thermodynamics
269     - growth.F and groatb.F are replaced by new routine seaice_growth.F
270     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
271     - move a few global fields out of SEAICE.h into seaice_growth.F and
272       make them 2D (FICE/QNETO/ ...)
273     - remove FO (it is the same as QNETO)
274     - introduce a few local fields to avoid modifying external fields such
275       as atemp, etc.
276    
277    checkpoint58s_post
278    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
279      changed exf_set_gen.F so that
280        genperiod=0 means input file is one time-constant field and
281        genperiod=-12 means input file contains 12 monthly means
282    o CG2D: use pre-computed solver main-diagonal (stored in common block);
283      this affects truncation error ; generate new output file for exp. which
284      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
285        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
286        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
287        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
288        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
289        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
290    o start implementation of deep-atmosphere and anelastic formulation
291    o verification: remove 2nd copy of input files and use script "prepare_run"
292      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
293    o mom_common/vecinv/fluxform: fix a few initialisation isssues
294    o profiles: fix for multithreaded case
295    
296    o diagnostics: rename few diags:
297      s/'PRESSURE'/'RCENTER '/g
298      s/'TICE    '/'oceFreez'/g
299      s/'TAUX    '/'oceTAUX '/g
300      s/'TAUY    '/'oceTAUY '/g
301      s/'SWFLUX  '/'oceQsw  '/g
302      s/DIFx/DFxE/g
303      s/DIFy/DFyE/g
304      and add few ocean-forcing diagnostics:
305      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
306    o modifications to pkg/seaice/growth.F and budget.F, which change results of
307      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
308      as actual snow thickness.  It now refers everywhere to effective snow
309      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
310    
311    checkpoint58r_post
312    o modifications to pkg/seaice/growth.F, which change results of
313      lab_sea experiment: fixes pertain to melting snow over open water, to
314      masking EVAP under sea ice, and to using the correct AREA variable for
315      computations of EVAP, PRECIP, HSNOW, and GHEFF
316    o add ability to read bathy, salt, and theta using MNC (off by def)
317    o add flooding algorithm and advection of HSNOW for pkg/seaice;
318      both are turned off by default and do no change any results
319    o seaice advection with pkg/thsice: a step toward the use of non-linear
320      advection scheme, but #ifdef or commented out for now (requires more EXCH).
321    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
322      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
323      in natl_box (affects results @ truncation level: update output.txt)
324    o multi-threading and IO:
325      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
326      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
327        (needed to work with SingleCpuIO): tested in all verif. exp.
328    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
329      affects the results (but none of the verification test uses this scheme).
330    o Adding some pkg/diagnostics capability to pkg/seaice
331      (will certainly be subject to changes)
332    o ctrl: adding new control variables:
333      lwflux, lwdown, evap, snowprecip, apressure, runoff
334    
335    checkpoint58q_post
336    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
337      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
338      high_res_cube configuration by 4% on Columbia.
339    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
340      add (in global_with_exf/code) a version of EXF_INTERP_READ without
341      dynamical allocation (seems to work in multi-threaded).
342    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
343      single CPU io) so that TAF does not have to see EESUPPORT.h
344    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
345    
346    checkpoint58p_post
347    o obcs: stop if obcs is used with useCDscheme = .true.
348    o shelfice:
349     - fix a sign error so that no slip at shelfice interface works
350     - remove stop for combination non-hydrostatic code and shelfice. That does
351       not mean, that the results are correct, but at least they are numerically
352       stable
353    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
354    o added adjoint exch routined for all exch*3d* routines
355      and updated flow directives
356    
357    checkpoint58o_post
358    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
359      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
360    o change controling S/R for writing pickup file (new S/R do_write_pickup)
361      and clean-up reading/writing of pickup files.
362    o fix local version of read/write pickup (NH part) in rotating_tank/code
363    o simplify EXCH interface:
364     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
365     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
366    o added the regrid package
367    o shelfice:
368     - add a simple boundary layer scheme to reduce noise
369     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
370    
371    checkpoint58n_post
372    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
373       local variable (not in common block).
374    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
375      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
376      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
377        to work with SingleCpuIO.
378    o add "_d 0" to real constant of pkg/cfc subroutines ;
379       update exp. cfc_exemple & tutorial_cfc_offline output files.
380    o multi-threading and IO:
381      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
382        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
383      - barrier before and after reading.
384      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
385      - avoid using MDS_WRITELOCAL for LAND pkg output.
386      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
387        common-block variables ; Allows multi-threading with master-thread IO.
388    o change default MAX_NO_THREADS from 32 to 4 ;
389      and stop cleanly when MAX_NO_THREADS is too small.
390    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
391    
392    checkpoint58m_post
393    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
394       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
395    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
396       keep global_ocean.90x40x15 (for AD testing) with former secondary test
397       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
398    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
399        add MITgcm_tutorials (= code + all the tutorials)
400    o ecco, option to compute cost for total ssh (mean+anom)
401    o consistent with addition of ptracer and ssh in pkg/profiles
402    o profiles: adding ptracer and ssh
403    o testreport: change multi-test output-file name
404      (from output.txt.{name} to output.{name}.txt)
405    o profiles: now ok for mutli-tiles case
406    o seaice: add 4 parameters for different advection schemes for area,
407      (effective) seaice thickness, enthalphy, and snow height. Their default
408      is the standard parameter SEAICEadvScheme
409    o calc_gw:
410     - add cosFacU in zonal viscous flux (harmonic.visc.).
411     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
412       of tutorial_plume_on_slope.
413    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
414    o calc_gw: true flux-form, account for horizontal grid spacing.
415      update rotating_tank results, but not plume_on_slope (affected at
416      truncation level, 11 digits).
417    
418    checkpoint58l_post
419    o calc_gw:
420     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
421     - remove side-drag for now (need to fix it); update plume_on_slope results.
422     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
423    o commit code to make SST/SSS weights spatially variable
424      (based on either variable in-situ or variable initial T/S weights)
425    o pkg/ecco:
426      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
427        now based on horizontally varying weights wthetaLev, wsaltLev
428      * cost_averagesflags now returns year indices in addition to day, month
429      * sflux balance is performed on annual basis
430        (sflxumm, sfluxmm2, bal_sfluxmm)
431      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
432        including separate counting and multipliers
433    o pkg/rbcs
434      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
435    
436    checkpoint58k_post
437    o testreport:
438     - always build in dir. "build" (if not there, mkdir build instead of building
439       & running in input)
440     - run in dir run (if it exists), in build otherwise.
441     - call prepare_run (if input/prepare_run exists)
442     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
443    o pkg/exf modifications to interpolation and rotation routines for more
444       reasonable treatment of North Pole singularity: for tracers North Pole
445       value is set to northernmost zonal-mean value, for zonal velocity it is
446       set to zero, and for meridional velocity it is set to northernmost value.
447    o pkg/exf/exf_check_range.F
448     - add tile index to diagnostics and move stop statement to the very
449       end of the routine.
450    o pkg/diagnostics: (diagnostics_main_init.F)
451      define title of isomorphic variables according to the current config.
452    o pkg/thsice with pkg/seaice dynamics:
453    - fix domain of computation (interior only, required for exf) and do exchanges
454    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
455    o towards a standard way of dealing with multi-threading in MONITOR
456      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
457    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
458       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
459    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
460    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
461    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
462       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
463    o tracer advection:
464     - clean-up and simplify calc_common_factors.F
465     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
466       advection subroutine (but still not used within DST advection S/R)
467    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
468    
469    checkpoint58j_post
470    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
471      from file (collects calls previously in FORWARD_STEP)
472    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
473    o adjoint store dir. adjusted accordingly
474    o genmake2
475      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
476    
477    checkpoint58i_post
478    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
479      on wind stress (SEAICEstressFactor defaults to 1.)
480    o Total number of Timers is finite (<=40): comment out 2 non-essential one
481      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
482    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
483      on CS-grid: no longer loosing mass.
484    o exf & curvilinear-grid: no longer modify longitude xC & xG.
485    o pkg/ggl90: fix sloppy output and fix a bug
486    o pkg/seaice: added SEAICEuseEVPpickup parameter
487      - Set to false in order to start EVP solver with
488        non-EVP pickup files when using SEAICEuseEVP
489      - fix sign error in diffusion in seaice_calc_rhs
490    
491    checkpoint58h_post
492    * Modifications for bottom topography control
493      o replace hFacC by _hFacC at various places
494      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
495      o add non-self-adjoint cg2d_nsa
496      o update autodiff support routines
497      o re-initialise hfac after ctrl_depth_ini
498      o works for 5x5 box, doesnt work for global_ocean.90x40x15
499    * Adding verification for 5x5 box (4-layer) bottom topography control
500    
501    checkpoint58g_post
502    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
503       used for mean seasonal cycle, mean diurnal cycle); add an example
504       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
505    o pkg/ggl90:
506      - add parameter (minimum surface kinetic energy)
507      - fix bug (avoiding division by zero)
508    o couple pkg/thsice to pkg/seaice:
509      - modify advection in seaice to accomodate new scalar fields to be advected
510      - only muliDimAdection scheme work with seaice/thsice
511      - mapping of thsice-variables to seaice-variables, back and forth
512      - does not break the verification experiments, but does not give the
513        desired results either
514    o pkg/seaice
515      - make (default) second order advection a bit less confusing?
516    
517    checkpoint58f_post
518    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
519      to pkg/seaice):
520      - new routines thsice_map_exf and thsice_get_exf provide the interface
521      - add an additional formal parameter to thsice_solve4temp
522    o pkg/exf:
523      - add new fields wspeed, snowprecip (to be able to couple to thsice)
524      - correct Stefan-Boltzmann constant
525      - new parameter for longwave surface emittance
526      - separate some stuff from exf_bulkformulae into new routines  
527        exf_radiation, exf_wind
528      - add new parameters and constants: longwave emissivity for ocean, ice
529        and snow, evaporation parameters over ice
530      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
531        either wind from stress or stress from wind
532    o pkg/thSIce:
533    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
534    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
535       and THSICE_CALC_THICKN
536    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
537    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
538      to make debugging easier.
539    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
540    o pkg/bulk_force:
541      - clean-up comments and parameters ;
542      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
543    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
544      generate new output for test-experiment: aim.5l_cs.thSI
545    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
546      testreport accordingly
547    
548    checkpoint58e_post
549    o SEAICE_CGRID adjoint done
550    o R_STAR adjoint implemented.
551      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
552      * need to sort out init. of h0facc, etc.
553    o Make pkg/profile fully independent of ecco,cost, etc. stuff
554      to be able to use it in pure forward.
555    
556    checkpoint58d_post
557    o upgrade simple test-experiment to tutorial example:
558     step.1: duplicate the experiment and (step.2) will remove the old copy.
559      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
560      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
561      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
562      tutorial_global_oce_biogeo    <- copy of dic_example
563      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
564      tutorial_plume_on_slope       <- copy of plume_on_slope
565      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
566      tutorial_global_oce_optim     <- empty for now (David ?)
567      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
568     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
569    o correct a sign problem in cost_scat.F
570    o obcs and ptracers: fix boundary conditions for advections schemes
571      with larger stencil
572    o thsice adjoint: start
573    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
574      completeness
575    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
576      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
577    o ptracers adjoint:
578      * avoid extensive recomputatations
579      * fix missing re-init. of gptr (missed by TAF)
580    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
581      me to turn off the excessive output to STDOUT that this package produces
582    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
583      and add those terms in Vector-Invariant formulation.
584    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
585      if the control period (xx_hfluxperiod etc) is 0
586    o in profiles pkg, clean routines and fix details
587    o in ecco pkg, reading ssh data:
588      fix problem in case the model does not start at iter0=0
589    o fix mnc-pickup/restart for ptracers
590    o new package prifiles:
591      code to compute profile-based cost by Gael Forget
592      (modifs in ecco, ctrl, autodiff)
593    o Benign bug fix in initialization (spotted by M. Mazloff) of
594      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
595    
596    checkpoint58c_post
597    o adjoint: finish NLFS adjoint and provide reference output in
598      verification/global_ocean.90x40x15/results_ad_nlfs
599    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
600      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
601      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
602      with SEAICE_CGRID defined.
603    o move calendarDumps from "data" to "data.cal" and clean-up the code
604      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
605    o add useEXF & useCAL flags (for now, set in hard-coded way)
606    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
607      (were missing in NH mode, and wrong in quasihydrostatic mode).
608      waiting for Chris updated version of calc_gw to add those CALLs.
609    o fix bug in quasihydrostatic S/R ;
610      add a test for this option: global_ocean.90x40x15.qshyd
611    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
612      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
613    o add on/off flag useOffLine for package OFFLINE
614    o seaice:
615      - modify advection so that it works also on the C-grid
616      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
617        problem in multi-tile runs with C-grid
618      - add flags for clipping ice velocities and/or masking solver forcing
619      - fix drag (ocean on ice) formulation and a bug that caused noise in the
620        C-grid solver
621      - added a few comments to seaice_diffusion.F
622      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
623        are now exclusive)
624      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
625        required re-ordering the code a little:
626       + make DAIRN global variable (defined in SEAICE)
627       + move computation of the viscosities eta and zeta into a new separate
628         routine (because I need to recompute them in seaice_ocean_stress.F)
629    
630    checkpoint58b_post
631    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
632      update output.txt of exp. aim.5l_cs.thSI
633    o various mnc cleanups and improvements:
634      + shrink lookup tables by factor of ~4
635      + better error reporting when running out of lookup space
636      + able to handle longer path/file names (up to 500 chars)
637    o adjoint:
638      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
639      - TBD: "hidden" mom_vecinv recomp. in dynamics
640    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
641     (allow to differentiate between forcing components using new integer flags:
642      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
643     and add new flag to put Dissipation tendency out of Adams-Bashforth.
644    o ecco
645      - enable trend removal from SSH anomaly obs.
646    o adjoint
647      - a fix for PmEpR when #undef EXACT_CONSERV
648      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
649      - try to fix "hidden" recomp. in forward_step for NLFS
650        (NLFS seems broken sometimes after I checked it in)
651    o seaice:
652     - add c-grid version of the dynamic solver:
653       + three new routines that are the c-grid substitute lsr, dynsolver
654         and ostres
655       + put a few fields that were local to dynsolver into global common
656         blocks, so that I can move the computation of stresses etc into
657         seaice_lsr (saves coding but may break the adjoint).
658     - replace more hardwired parameters by runtime parameters
659     - add ice masks that mask the rhs of the implicit solvers where there
660       is no ice (commented out in seaice_dynsolver, because i am not sure
661       if this works properly), eventually this should replace the clipping
662       of ice velocities in seaice_dynsolver to +/-40cm/s.
663    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
664      include it only where its needed
665    o move balancing of fluxes before the call of external_forcing_surf
666    o seaice:
667      - correct units of turning angles (now they are really in degrees)
668      - move computation of GWATX/Y out of main routine into dynsolver
669      - initialize GWATX/Y in seaice_init
670    o Apply mask on Fresh-Water flux (needed for SSH forcing).
671      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
672    o seaice: add runtime flags for turning angles (default to zero)
673    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
674      and trend from exf forcing and ctrl control adjustments
675    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
676      (since checkpoint57x_post)
677    o change the default rotation period to 86164.s = the Earth rotation
678    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
679      and based on a reference stratification. Tested within hs94.cs-32x32x5.
680    o seaice advection: add code for choosing between the default (2nd order
681      central differences) and multiDim advection schemes provided by
682      pkg/generic_advdiff
683    o seaice:
684      - removed all references to SEAICE_GRID.h fields from
685        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
686        (cubed-sphere configuration will change a little)
687      - grid computations in seaice_init are obsolete now.
688      - cleaned up code a little so that is easier to read (hopefully).
689      - added new (better?) discretizations of default advection and diffusion
690        (turn on with SEAICEuseFluxForm)
691      - replace 1 in 3d global fields by kSurface in growth.F
692      
693    checkpoint58a_post
694    o seaice:
695      - bug fix in advect.F
696    o shelfice:
697      - separate shelfice load anomaly from pload (breaks with time
698        dependent forcing), => introduce constant field shelficeLoadAnomaly.
699        Its default is 0., but it may be computed more cleverly from (unknown)
700        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
701        done offline. A good approximation of the pressure load anomaly is
702        necessary to avoid large initial adjustment processes underneath
703        deep-reaching shelfice.
704      - small fix in ISOMIP shelfice_thermodynamics
705      - add more sophisticated thermodynamics of Hellmer (1989), this is
706        now the default
707      - give a few constants more intuitive names
708    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
709      if bulk formulae are used in long integration (especially EmPmR). Turn
710      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
711      if balancePrintMean, the imbalance that is substracted is printed to
712      STDOUT.
713    o fix bug (typo) in obcs_apply_eta.F
714    o add a new package shelfice which enables us to model the circulation
715      underneath shelf-ice with draughts of hundreds of meters.
716     - works
717     - to do: + include improved thermodynamics
718              + check whether kSurfC (from model/inc/SURFACE.h) can be used
719                instead of new field kTopC
720              + can we use topoFile, Ro_surf and existing code in ini_depth.F
721                instead of new field R_shelfIce and new code in ini_depth.F
722                and ini_mask_etc.F?
723              + adjust vertical mixing schemes?
724    o seaice pkg:
725     - add a cpp-flag to include a simple formula for a salinity dependent
726       freezing point of sea water at the surface
727     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
728       meridional stresses are now different (and hopefully correct)
729    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
730       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
731       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
732    o pkg/diagnostics: add options and parameters for regional-statistics
733       diagnostics ; define regions by reading a region-mask from a file
734       (might add other options later)
735    o pkg/bulk_force:
736     - add option and parameters to use AIM surface-flux formulae.
737     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
738       others forcing fields (defined in PARM05, parameter file "data") are loaded
739       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
740     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
741     - use the right EXCH call for uwind,vwind (to work on CS-grid).
742     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
743       and parameters (note: calcWindStress replaces .NOT.readwindstress).
744     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
745    
746    checkpoint58
747    o add "--embed-source" option to genmake2 which, when the supporting
748      tools can be compiled (as determined by genmake2) will turn on the
749      embed_files package which then embeds the entire MITgcm source code
750      (*.[fFhc] + Makefile) used for the build within the executable
751      - requested by CNH but off by default
752      - adds a paltry <9MB to the mitgcmuv executable in most cases
753      - only writes the output when useEMBEDSRC in eedata is true
754    o clean up 3-dim. relaxation codes:
755      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
756      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
757      * Thanks to Tom Haine for testing!
758    
759    checkpoint57z_post
760    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
761      affects output (@ truncation level) of exp. plume_on_slope ; updated.
762    o fix the pickup behavior for obcs in combination with ptracers
763    o fix a bug in ptracers_external_fields_load
764    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
765      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
766    o transfered surface NH pressure to eta field (if exactConserv).
767    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
768         and update lab_sea output.txt file.
769    o completing 3-dim. relaxation code: additional term
770         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
771      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
772      * At compile time, in "EXF_OPTIONS.h" set
773          #define  ALLOW_CLIMTEMP_RELAXATION
774          #define  ALLOW_CLIMSALT_RELAXATION
775      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
776          tauThetaClimRelax3Dim = 15552000.0,
777          tauSaltClimRelax3Dim  = 15552000.0,
778      * 3 cases:
779          1) Use a constant-in-time 3-dim. field
780          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
781          3) Real-time relax. to time-evolving prescribed field
782    o Adding Laplacian-type smoothness constraint on
783      initial and boundary (forcing) controls (ic, bc)
784      * enable at compile-time via
785        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
786      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
787      * Absolute scale somewhat unclear so far
788      * no area weighting was included since no other cost term does so far
789    
790    checkpoint57y_post
791    First step for a NLFS adjoint
792    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
793    o new init. routines for calc_r_star, calc_surf_dr
794    o still need to deal with ini_masks_etc
795    o testreport seemed happy
796    checkpoint57y_pre
797    
798    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
799    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
800    o add new offset feature to offline pkg (plus minor cleanup)
801    o cfc fixes for final year of integration
802    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
803      be in GCHEM_OPTIONS).
804    
805    checkpoint57x_post
806    o fix testreport Pb in multiple test experiment.
807    o cleanup our namelist syntax in verification:
808      - make it more F95 standards compliant (some work still needed)
809      - allows the vast majority of our tests to work with gfortran
810    o Non-Hydrostatic:
811     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
812     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
813    o Allow to apply AB on T,S rather than on AB(gT,gS):
814     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
815     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
816       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
817     - need a "clever" read_pickup to restart from the other AB formulation
818    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
819    o remove some unused variables (reduces number of compiler warnings)
820    o adjoint
821      * Disable useVariableViscosity for adjoint for time being
822        (there are a number of extensive recomputations)
823      * Initialize certain variables needed for adjoint
824    
825    checkpoint57w_post
826    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
827                 fix the singleCpuIO RS version of MDSWRITEFIELD
828       and add a WARNING if using globalFiles=T with multi-processors.
829    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
830      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
831    o tracer advection scheme:
832      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
833       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
834       was not very convenient).
835      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
836       (further tests needed for the implicit DST & Flux-Limiter schemes).
837    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
838      and sRef for convenience, handy, when you want to initialize
839      ptracers in a large domain with a constant non-zero value. Also,
840      untangle ptracers_init.F a little.
841    
842    checkpoint57v_post
843    o change dome exp. to use variable viscosity in side-drag terms.
844    o remove all the files from the cfc_offline test since they are now
845      incorporated into tutorial_cfc_offline which has been producing
846      identical results for a few days of testing
847    o add new parameter: sideDragFactor to enable half-slip-side BC
848      and change side-drag S/R to use viscosity from mom_calc_visc
849      (can switch back by setting sideDragFactor=0.); affects results at
850      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
851       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
852    o vorticity & strain are now computed without masking, to account for
853      no-slip-side BC in variable viscosity calculation ; mask is applied
854      anyway later on, before computing advection/coriolis terms.
855    o modify exp4 to test new obcs support for reading from external files
856      and for passive tracers
857    o fix behavior of ptracers_monitor when monitor output is written to a
858      netcdf-file; still not independent of monitor.F (writes in the same
859      file).
860    o change default value of tRef (put a uniform, meaningful value for ocean
861      & atmos) and initialize sRef (was missing, as Martin mentioned).
862    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
863      to be proportional to enstrophy dissipation length.  Thus,
864       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
865      This is now consistent with Smagorinsky and with the manual.
866    
867    checkpoint57u_post
868    o OBCS and PTRACERS: add open boundary support for passive tracers
869      - either use homogenous (pseudo) v.Neumann conditions or prescribe
870        OB-values from file; this is not different from the way theta and salinity
871        are treated
872      - however, Orlanski-radiation conditions are not supported, and the model
873        will stop if you use pTracers and Orlanski at the same time.
874      - beefed up the rountine obcs_external_fields_load: now only those open
875        boundary values are overwritten with values from files for which there
876        are really files, otherwise the OB-fields remain untouched. This makes
877        it possible to use different OBs at different ends of the domain (as
878        with EXF)
879    o reduce number of exch calls in shap_filt (s2).
880    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
881      truncation level) 4/5 MLAdjust test results (11&12 digits match).
882    
883    checkpoint57t_post
884    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
885    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
886      same truncation, independent of the face number: affects affects several
887      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
888    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
889      note that biharmonic viscosity + no-slip was not tested in any experiment.
890    o fix bug in non-linear free-surf side-drag ; generate new output for
891      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
892    o make mnc honor the writeBinaryPrec flag for most kinds of output
893    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
894    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
895      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
896    o add brackets in multi-terms sum to get same truncation, independent of
897      the face number (manage to get exactly same value of gU,gV at the cs-edge)
898      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
899    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
900      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
901      a maximum grid-scale Reynolds number.  Also, changes all length calculations
902      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
903      Suggested values of viscosity parameters found in mom_calc_visc.
904      Many new viscosity diagnostics available.
905    
906    checkpoint57s_post
907    o Add clearing-house for viscosity calculations, mom_calc_visc and
908      correct numerous bugs in LeithD and Smagorinsky discretizations.  
909      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
910      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
911      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
912      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
913      The Strain-Tension form is now called with useStrainTensonVisc=.true.
914      ViscAhStrain and viscAhTension are now retired.
915    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
916    o In response to JMC's bug report, genmake2 now ignores any soft-links
917      that it finds in the *current* directory when searching for files.
918      Soft-links found in any other source directories will still work as
919      they did before.
920    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
921      a C routine to unlimit the stack size
922    o mnc-ify pkg/aim snapshot vars
923    o mnc-ify pkg/land as requested by Daniel
924    o various changes to mnc including:
925      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
926      - output can now be grouped so that all files within a group
927          change the ITER portion of their names in lock-step together
928      - can now read ("global") PER-FACE (in addition to PER-TILE) files
929          and works with both EXCH1 and EXCH2 (but needs more testing)
930      - writing works for all verification test cases w/ g77 on Linux
931    
932    checkpoint57r_post
933    o make MNC variable initialization happen earlier
934    o add diagnostics for (almost) each term of the momentum Eq.
935    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
936    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
937    o remove MINIMAL_TAVE_OUTPUT option ;
938      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
939    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
940      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
941    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
942    o add time-dependent SST, SSS control
943    o cost terms in ecco/ modularized (new cost_generic.F)
944    o cost_averages routines are modularized (new cost_averagesgeneric.F)
945    o new infrastructure for seaice model vs. obs misfits in seaice/
946      * driver from the_main_loop.F is seaice_cost_driver.F
947      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
948      * gradient check in Exp. 6a of natl_box_adjoint/
949    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
950      (see README file)
951    
952    checkpoint57q_post
953    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
954    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
955      - bug was reported by Jean-Michel and Ian Fenty
956    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
957      update exp. cpl_aim+ocn output.
958    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
959      Needed for high-res. runs with large global files
960      to be able to limit tapelev size
961    o Changed some tests for adjoint:
962      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
963      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
964      * global_ocean.90x40x15/ back to default 3-level checkpointing
965    o Modifications to enable scripted COMMON to MODULE conversion
966      * verification/OpenAD/code/ has necessary scripts and description;
967      * converts, compiles and runs successfully;
968    
969    checkpoint57p_post
970    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
971    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
972      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
973    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
974    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
975      (was already the case for dissipation with mom_vecinv,
976       and also the case for grad.PhiHyd when staggered-timeStep)
977      This will allow to put dissipation out-off the AB time-stepping.
978     Unfortunately, affects truncation error. Update output of exp. that "fails"
979      (cg2d matching number) and leave the others for later: front_relax(10),
980      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
981      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
982    
983    checkpoint57o_post
984    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
985      (2) its ready to be documented during the 20050801 DocFest
986    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
987      for ideal_2D_oce and lab_sea on linux_ia32_g77
988    o set to #undef CTRL_SET_OLD_MAXCVARS_30
989      in global1x1_tot/code_seaice_adj to access indices 32, 33
990      (worth another tag)
991    
992    checkpoint57n_post
993    o adding precip control xx_precip 32
994    o adding swflux control xx_swflux 33
995    o Replacing 10 forcing penalty cost routines by 1 generic.
996    o Implementing partitioning in time-mean and variable adjustment
997      for atmos. state.
998    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
999    o in natl_box_adjoint:
1000      * updated exp 1 to 10
1001        (but does not have time-mean vs. variable split results yet)
1002    o updated global1x1/*_seaice_adj/
1003      to incorporate latest changes
1004    o enable useSingleCpuIO for mdsio vector routines
1005      (applies in particular to tapelev I/O)
1006    o removed inefficient K-loop in all active_file*control*.F
1007    
1008    checkpoint57m_post
1009    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1010      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1011    o pkg/exch2: filling of face-corner halo regions is optional
1012      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1013    
1014    checkpoint57l_post
1015     tag before updating tutorials (pre-release-2)
1016    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1017       for output and interpolation of input fields onto model grid)
1018    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1019       Affects results of exp. rotating_tank ; update output.txt.
1020    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1021          and taking the square quantity and/or using a fraction-weight field.
1022    o fix aim_diagnostics_init.F mate numbers.
1023    o add mnc output capability to diagnostics/diagstat and update
1024      our cvsignore files for the ACSII output generated
1025    
1026    checkpoint57k_post
1027    o lab_sea now uses diagnostics package and provides a suite of
1028      new EXF diagnostics output.
1029    
1030    checkpoint57j_post
1031    o exf
1032      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1033        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1034        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1035      * extended diagnostics output
1036        - now includes all EXF variables
1037        - hs, hl moved to common block
1038        - separate S/R for diagnostics, called after ctrl vector is added
1039        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1040        - EXFqnet contains true Qnet (i.e. includes qsw)
1041      * updated verif. lab_sea, global_with_exf
1042      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1043        to ensure that diagnostics sees a true EXFqnet
1044    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1045    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1046      several times with different frequencies.
1047    o mnc-ify the thsice package as requested by Daniel Enderton
1048      - the monitor--MNC output needs work
1049      - many attributes need to be added (most are currently blank)
1050    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1051      - many attributes need to be added (most are currently blank)
1052    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1053    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1054    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1055      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1056         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1057    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1058     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1059    
1060    checkpoint57i_post
1061    o Diagnostics package was changed: diagnostic allocation is now deactivated
1062      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1063    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1064      add 1rst Order upwind vertical Shear.
1065    o add a quick fix for A/B checkpointing in OFFLINE mode
1066    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1067      end-run around the C/Fortran linking horror in eesup/src/timers.F
1068    o added pkg/runclock: allows user to terminate run based on wall clock
1069    o added non-hydrostatic scaling parameter: nh_am2
1070    o pkg/my82: futile attempt to make results compiler-independent by adding
1071      some "_d 0", etc. no effect.
1072    o for mnc output, fill the 'T' coordinate var with myTime and create a
1073      separate 'iter' variable for iteration count
1074    o pkg/diagnostics:
1075      add new capability: output of Global/Regional & per-level statistics ;
1076      tested against monitor output (including land & thSIce) on various exp.
1077    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1078    
1079    checkpoint57h_done
1080      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1081      data.diagnostics, data.gchem, data.ptracers) is done.
1082    
1083    o pkg/diagnostics: prepare for Global/Regional statistics.
1084      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1085    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1086      and rename it: DIFFERENT_MULTIPLE
1087    
1088    checkpoint57h_post
1089    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1090    o pkg/diagnostics: change output frequency, now in seconds (instead
1091      of Nb of iterations). This requires to change data.diagnostics.
1092    checkpoint57h_pre
1093    
1094    o in mnc, let the user create the output dir if both mnc_outdir_date
1095      and mnc_outdir_num are false
1096    o add fflags() to pkg/diagnostics which allows one to specify, on a
1097      per-file basis, the file precision [default behavior is unchanged]
1098    o added diagnostics to pkg/kpp, including computation of mixed layer
1099      depth based on a temperature/density criterion
1100    o updated verification/natl_box to test the new pkg/kpp diagnostics
1101    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1102    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1103    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1104      not mnc -- this mistake was found by JMC and is now corrected
1105    
1106    checkpoint57g_post
1107    o add Adams-Bashforth 3rd Order time stepping:
1108      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1109      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1110    checkpoint57g_pre
1111    
1112    o make lambda[Theta,Salt]ClimRelax spatially varying
1113      (default remains spatially uniform constant based on tau)
1114    o added new control variables
1115      * init. uVel, vVel, etanN
1116      * lambda[Theta,Salt]ClimRelax
1117    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1118      (suggested by G. Forget)
1119    
1120    checkpoint57f_post
1121    o add parameter "baseTime" = model base time = time at iteration zero
1122      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1123      account for baseTime shift
1124    o move Coriolis arrays from PARAMS.h to GRID.h
1125    checkpoint57f_pre
1126    
1127    o mnc-ifying the seaice package
1128    o introduced an alternative length scale calculation for use in the limiting
1129      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1130    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1131    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1132      as well as grad(vort3).  Made it compatible with both approximate form
1133      for the cubed sphere and full form of these gradients.  Added flag
1134      useFullLeith to select between approximate and full form.  
1135    o add "d0" in getcon.F to reduce differences between compilers/platforms
1136      update output.txt of exp. fizhi-gridalt-hs
1137    o change port_rand funtion to allow to set the seed.
1138    o fix obscure MNC bug involving conversion between reals and integers
1139      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1140        new version is now more standards-compliant
1141    o adjoint-related modifications
1142      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1143      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1144      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1145    
1146    checkpoint57e_post
1147    o Adding eddy stress controls a la Ferreira et al.
1148    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1149    
1150    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1151      update output.txt of exp. fizhi-gridalt-hs
1152    o add more "Z" dimensions and associated coordinate vars to MNC
1153    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1154    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1155      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1156      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1157      months and years.  Requires pkg/cal.
1158    o diagnostics: add pickup functionality
1159      - off by default for backwards compatibility
1160      - current version only uses MDSIO -- MNC will be added
1161    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1162    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1163    
1164    checkpoint57d_post
1165    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1166    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1167      output from the diagnostics package
1168    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1169    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1170      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1171    o add coordinate variables to the MNC output from the diagnostics package
1172    o change MNC-flags default value: true when useMNC=TRUE
1173    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1174      the ability (off by default) to read the grid information using MNC
1175    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1176    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1177    o do snap-shot diagnostics at the middle of the time-interval (instead of
1178      at the end).
1179    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1180      new test for AIM with thSIce + slab-ocean
1181    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1182    o move state variable diagnostics to the beginning of the time step ;
1183      (note: still needs some work specially for snap-shot diagnostics)
1184      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1185    
1186    checkpoint57c_post
1187    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1188    o generate new output.txt files on faulks with g77 & the new -ieee option
1189    checkpoint57c_pre
1190    
1191    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1192      update output.txt of exp. global_ocean.90x40x15
1193    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1194      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1195    o add saltFlux(+File) forcing capability with periodicExternalForcing
1196    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1197    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1198    o improvements for the MNC output from DIAGNOSTICS:
1199      - correct handling of the unlimitied dimension
1200      - all dims now have associated coordinate variables
1201      - variables located at U, V, and Corner ("Z") points are now written
1202        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1203        *all* data points are output
1204    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1205    o added pkg/seaice/seaice_monitor.F
1206    o mdsio_readfield.F can now read files visible only to master MPI process.
1207    o pkg/seaice: some test code for ice-modified ocean stress
1208    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1209      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1210      spurious negative numbers for precipitation and humidity.  Will cause
1211      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1212    o pkg/ctrl/
1213      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1214        May be enabled via doPackDiag
1215      *  introduce z-scaling of
1216         + gradient (doZscalePack) and
1217         + control (doZscaleUnpack)
1218    o pkg/mdsio/
1219      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1220      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1221    
1222    checkpoint57b_post
1223    o simplify options in diagnostics_fill arguments (remove weird combinations)
1224    o fix MNC coordinate variables so that they now contain per-face index
1225      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1226      general, EXCH2 grids are only aligned to a "local" coordinate system
1227    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1228    o Implement instantaneous output within pkg diagnostics:
1229      setting a negative frequency in data.diagnostics produces
1230     "snap-shot" output (as opposed to time-average if freq > 0)
1231    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1232      NOTE: change ptracer diagnostics name: use 2 characters to work with
1233            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1234    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1235      becomes the coordinate variable for the 'T' dimension
1236    o add CF-style coordinate variables to MNC
1237      - just a first cut:  numbers are meaningless on the cubesphere and
1238        missing along the T axis but otherwise it works!
1239    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1240    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1241    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1242      this is based directly on what the model compute, so that the content of
1243      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1244    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1245    o clean up build options files for SunOS, in particular
1246      - remove -traditional from xmakedepend
1247      - change -xarch=v9 to -xarch=native for f77
1248      - restore use of make (not gmake)
1249      - add CC=gcc if using g77
1250    o changes per discussion of AM, JMC, & EH3 today:
1251      - move redundant "grid" variables out of "state" -- in preparation of
1252        creating proper CF-style coordinate variables and in recognition
1253        that any/all grid variables can be easily copied (eg. w/NCO) from
1254        the grid files into any of the other NetCDF files
1255      - *always* output grid variables with MDSIO (this will eventually be
1256        changed)
1257      - output MNC grid file if useMNC is true
1258    o every instance of _END_MASTER() has been found and replaced with
1259      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1260      preprocessors
1261    o re-arrange diagnostics pkg initialisation:
1262     - allow each package to extend the available diagnostics list
1263     - add some checking and fix small problems (multi-threaded, ...)
1264     - new S/R diagnostics_fill (replace fill_diagnostics):
1265       look through the short list of active diag. (instead of the long list)
1266       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1267    
1268    checkpoint57a_post
1269    o this set of changes restores TAMC compatibility
1270      tested for global_ocean.90x40x15 adjoint on trough
1271      (what a pain)
1272    
1273    checkpoint57a_pre
1274    o some modifs in tools/build_options for sunos
1275    o call ctrl_pack for ctrl at end for optimcycle=0
1276    
1277    checkpoint57
1278    o add horizontal bi-harmonic viscosity for vertical velocity
1279      - new parameter viscA4W (defaults to viscA4)
1280      - affects only non-hydrostatic code
1281      - to be done: no-slip lateral boundary conditions
1282    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1283    o implement Implicit Vertical advection for pTracers
1284    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1285      (implemented also for implicit vertical diffusion & advection)
1286    o OBCS: extend application of tracer open boundary conditions
1287      to a strip beyond the boundary of width Olx/Oly
1288    o add call monitor to TAF set of required calls (flow directives)
1289      and include in natl_box_adjoint
1290    o untangle a few ifdefs related to cost, ctrl, autodiff
1291      untangel a few ALLOW_ECCO_OPTIMIZATION
1292    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1293      (theta2, salt2 in ecco_cost_weights)
1294    
1295    checkpoint56c_post
1296    o OBCS as control variables
1297      - update ctrl_ad_diff.list, obcs_ad_diff.list
1298      - remove balance of obcs controls from default
1299      - fix index bug nobcs in ctrl_init
1300      - fix dummy fields filen in ctrl_pack
1301      - add dummy weights for obcs
1302    o lsopt: comment out fort.94 output
1303    o optim:
1304      - remove unnecessary header files
1305      - adjusted namelists
1306      - add xerbla.F to Makefile
1307    o exf:
1308      - multiple modifications of exf_check_range
1309      - unit change in exf_init_runoff from [m/year] to [m/s]
1310    o mdsio:
1311      - i/o-vector change debugLevel from debLevA to debLevB
1312    
1313    checkpoint56b_post
1314    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1315      is called from DO_THE_MODEL_IO
1316      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1317      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1318      - clean up PTRACERS_WRITE_TIMEAVE a little
1319    o add another verification experiment that tests both the cfc-pkg and
1320      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1321      reactive tendencies treated inline with regular timestepping
1322    o testreport previously did a lousy job of comparing small numbers, so
1323      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1324      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1325      testreport.
1326    o ptracers_monitor: bug fix for MPI
1327    
1328    checkpoint56a_post
1329    o GCHEM: finish reorganizating the package
1330      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1331        (introduces another 3D-array for each passive tracer, but only if
1332        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1333        gchemTendency is not needed because the timestep is done separately)
1334      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1335      - GCHEM is now---more or less cleanly---separate from PTRACERS
1336      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1337        so clear to me how that should be done in a general way.
1338    o CFC: improve formatting of output in CFC_ATMOS
1339    o PTRACERS:
1340      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1341        that ALL experiments with ptracers enable can be checked. This makes
1342        GCHEM_MONITOR obsolete.
1343      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1344        monitorFreq
1345      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1346    o add PTRACERS (PTR0[1-5]) to testreport output
1347    o exf_check_range:
1348      * default changed to .TRUE.
1349      * will check values for niter0 if debLevA, every timestep if debLevB
1350      * STOP in exf_check_range if 'out of range'
1351      * range chosen generous to allow for potential extema
1352      TBD: a version with stricter range
1353           permitted range would be runtime parameters
1354    o GMredi:
1355      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1356      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1357      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1358    o GCHEM:
1359      - move call to GCHEM_FORCING_SEP, so that it is now called before
1360        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1361      - introduced a useGCHEM runtime flag and applied it everywhere.
1362      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1363        this flag is now only visible within GCHEM-pkg routines.
1364      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1365        be replaced by a 3D array that is computed before thermodynamics; for
1366        this, the tracer ID iTracer had to be included into the parameter list
1367        of ptracers_forcing
1368      - set up forward_step to call gchem_forcing, that will replace
1369        gchem_forcing_int in ptracers_forcing
1370      - cleaning up
1371    o small cleaning of exch2: remove files that are also in eesupp/src
1372    
1373    checkpoint56
1374    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1375    o mnc: cleanup "full" files--fixes out-of-memory problem
1376    o ECCO-GODAE
1377      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1378      * fully merged and updated from SIO code
1379        windstress sign change affects
1380        - exf_inscal_[u/v]stress
1381        - sign of xx_tau[u/v] adjustments
1382        - signs in cost_scat
1383      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1384      * natl_box_adjoint updated and compressed
1385      * 2-level checkpoint switch added
1386        (tested in EXP. 1 of natl_box_adjoint)
1387      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1388    o SVD
1389      * first complete, non-hacked version for SVD calculations
1390      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1391        performed via direct access files admtlm_vector.it????
1392        (via ctrl_[un]pack)
1393      * optimcycle is used for ARPACK iteration counter
1394        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1395      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1396        and add linear transforms where necessary
1397      * controls are initial/final SST, SSS (can be extended; need to check
1398        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1399    o mdsio: filename info to both stderr, stdout
1400    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1401      from sign change
1402    
1403    checkpoint55j_post
1404    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1405      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1406    o add consistent build directories and .cvsignore files to verification
1407    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1408    o make all subroutines 30 or less characters in length for certain older
1409      compilers to work (a thorough search only turns up two routines in
1410      pkg/ptracers)
1411    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1412      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1413    
1414    checkpoint55i_post
1415    o change arrays for total vertical diffusivity (2.D if explicit,
1416      3.D if implicit) ; each ptracer uses its own background value.
1417    o added mnc/NetCDF output capability to ocn_compon_interf
1418      - added bits to verification/cpl_aim+ocn so that it can run on
1419        ITRDA and other clusters without the mpirun "-wd" option
1420    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1421      configuration
1422    o give MNC the ability to create additional files rather than
1423      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1424      - the default is just less than 2GB which is a practical limit
1425        on many systems
1426    o Compute the non-local term using either KPP vertical diffusivity (=default)
1427       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1428    
1429    checkpoint55h_post
1430    o add verification test "vermix"
1431    o remove all the *_ioinc flags and replace with the single global
1432      outputTypesInclusive flag
1433    o allow to set a vertical profile of vertical diffusivity for T & S
1434    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1435    o useMNC moved from data.mnc to data.pkg
1436    
1437    checkpoint55g_post
1438    o Renaming carbon AD experiments to comply with testreport conventions
1439    o Updating adjoint of Held-Suarez hs94.1x64x5
1440    o Fixing directives for non-ECCO forward_step, after ECCO directives
1441      have been fixed to avoid recomp. of do_oceanic_phys
1442      Works well for global_ocean.90x40x15,
1443      but recomp. issue remains for carbon
1444    o Updating adjoint output for natl_box_adjoint after
1445      pkg/ecco has been modified (see taga c55d_post)
1446    
1447    checkpoint55f_post
1448    o rename to timeave_init_fixed
1449    
1450    checkpoint55e_post
1451    o some delicate re-shuffle of store directives to avoid one
1452      extra call of do_oceanic_physics
1453      affects ecco_the_main_loop.F, do_oceanic_physics.F
1454      checkpoint_lev1_directives.h
1455    o NB: this may break global_ocean adjoint temporarily,
1456      but it is clear how to fix it. Will do later, need this now.
1457    
1458    checkpoint55d_post
1459    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1460    o ecco_cost_weights is modified to 1x1 runs
1461    o modifs to allow observations to be read in as
1462      single file or yearly files
1463    o enable to read exf forcing fields as either
1464      single file or yearly files (flag useExfYearlyFields)
1465    checkpoint55d_pre
1466    
1467    o switch between 2-level and 3-level checkpointing
1468    o add ability of MNC to write local and "partial" (eg. 2D slices where
1469      the full 3D field is never actually stored) arrays to NetCDF files
1470      with the correct (that is, the complete multi-dimensional) set of
1471      array indicies
1472      - used in mom_vecinv() to write the diagFreq output
1473      - tested (demonstrated) in verification/aim.5l_cs
1474    o further mnc-ification
1475      - add verification/lab_sea to the list with mnc setups
1476      - fix undefined mnc v-names in cd_code
1477      - add kpp to mnc output (both snapshot and timeave)
1478    o non-hydrostatic code
1479      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1480        in calc_gw.F
1481      - defaults to viscAh
1482      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1483        friction or Leith) in non-hydrostatic mode, as long as there is
1484        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1485    o pkg/cost
1486      extend simple cost functions to treat time mean quantities
1487      (T,U,V) via cost_accumulate_state from cost_tile
1488    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1489        be 2 times larger than the minimum size the advection scheme requires.
1490        now get a perfect conservation of salt in advect_cs test-exp (updated)
1491    o GGL90 (Gaspar's TKE mixed layer)
1492      - add horizontal diffusion of TKE, requires exchanges in
1493        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1494        default. In OPA there is no horizontal diffusion of TKE but the
1495        mixing coefficients are computed from a horizontal average of TKE of
1496        6 points or so. I think that diffusion has a little more physical
1497        justification.
1498      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1499        was in vain)
1500      - mask tke-variable in ggl90_init
1501    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1502    o fix biharmonic diffusion on CS-grid.
1503    o more obcs stuff
1504      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1505        for reading boundary values. This routine is called from
1506        obcs_prescribe_read
1507      - updated obcs_check
1508      - changed sponge layer relaxation parameter units for days to seconds
1509      - turned off sponge layer by default
1510      - changed argument list of OBCS_CALC to myTime+deltaTclock
1511      - fixed about 35 bugs in obcs_external_fields_load
1512    
1513    checkpoint55c_post
1514    o obcs stuff
1515      - new runtime flags useOBCSprescribe, useOBCSbalance
1516      - re-arranged obcs_calc
1517      - moved exf_getobcs to obcs_prescibe_read
1518        obcs_prescibe_read is called after ORLANSKI stuff
1519        and independent of it (executable can contain all).
1520      - updated obcs_check
1521      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1522        These may be necessary only if tangential velocities are
1523        prescribed at OB, not sure, needs testing.
1524    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1525      which simplifies the calls and passes the ifc check-bounds test
1526    
1527    checkpoint55b_post
1528    o add a 2D scalar, Z location, exchange_2 routine.
1529    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1530      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1531      affects advect_cs results (for the wrong reason): update output.txt
1532    o use a more standard discretization for biharmonic viscosity ;
1533     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1534      affects results of dome set-up: update output.txt
1535    o fix gad_advection.F (CubedSphere part), back to version 1.23
1536    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1537    
1538    checkpoint55a_post
1539    o merged code to
1540      * prescribe/read time-dependent open boundaries
1541        (works in conjunction with exf, cal)
1542      * sponge layer code for open boundaries
1543      * each boundary N/S/E/W now has its own CPP option
1544        (healthy for the adjoint)
1545    
1546    checkpoint55
1547    o up-to-date adjoint of previous breaks
1548      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1549      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1550      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1551      - carbon: * remove tr1-related adjoint verification
1552                * add ptracer as control variable
1553    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1554      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1555    
1556    checkpoint54f_post
1557    o in verification/carbin/ remove experiment related to
1558      ALLOW_PASSIVE_TRACER (array tr1 etc)
1559      code_ad/ input_ad/ results_ad
1560    
1561    o add two new packages
1562      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1563        + subject to optimization (memory)
1564      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1565        + subject to reordering (many GOTOs in the original code)
1566        + so far opps is called for every (i,j) point, and then operates in
1567          the vertical; one may want to reorder the scheme in order operate in
1568          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1569          fields)
1570    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1571      - all verification tests compile and run with linux_ia32_g77
1572      - defaults are compatible with current input files--nothing
1573        should change if you were not previously using MNC
1574      - MNC output has been added in numerous places (eg. timeave)
1575        but there are still a few writes not yet do-able with MNC
1576        (this is in progress)
1577      - flags now allow for either/or/both use of MDSIO and MNC and
1578        documentation will soon follow
1579      - numerous small formatting cleanups for ProTeX
1580    o add version info (via BUILD_INFO.h) to MNC and stdout
1581    
1582    checkpoint54e_post
1583    o add two new packages
1584      - pp81 (Packanowski and Philander, 1981), Richardson number and
1585        stratification dependent mixing
1586      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1587      - these scheme operate in a similar manner as KPP (without ghat, of
1588        course), however there is only one diffusivity that is used for both
1589        temperature and salinity (and passive tracers)ç
1590    o add offline package
1591    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1592      provided by Stephanie Dutkiewicz
1593    o genmake2: add ability to search for C compilers and cleanup test output
1594      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1595    
1596    checkpoint54d_post
1597    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1598    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1599      leading to additional shift by 5 days each year of integration
1600       (i.e. leading to considerable offset over the years)
1601    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1602    o start with no AB and no initial filtering (staggerTimeStep):
1603      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1604    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1605      (external loading & cpl import/export stay in forward_step.F)
1606    o update coupling interface to work with new staggerTimeStep
1607    o change MDSIO ptracers_pickup.
1608    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1609    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1610    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1611    
1612    checkpoint54c_post
1613    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1614      this affects (truncation error) output.txt of test-exp:
1615       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1616    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1617    o change Qnet to always be the net heat flux, (+upward).
1618      affects (truncation error) output of natl_box exp.: updated
1619    o define the max number of passive tracers in PTRACERS_SIZE.h
1620    o start to test mnc routinely in exp0
1621    o add sea-ice loading (sIceLoad) as a new forcing field.
1622    
1623    checkpoint54b_post
1624    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1625       impressive on Altix and Opteron systems)
1626    o diagnostics can now write NetCDF files through the mnc package
1627    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1628    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1629    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1630      affects (truncation error) output of lab_sea & natl_box exp.: updated
1631    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1632    
1633    checkpoint54a_post
1634    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1635    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1636    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1637    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1638      + internal_wave (shift in writing cg2d_ini_res)
1639    checkpoint54a_pre
1640    
1641    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1642      - modified verification/lab_sea and natl_box_adjoint accordingly
1643    
1644    checkpoint54
1645    checkpoint53g_post
1646    o prepare splitting of thermodynamics: store convect.counter in common block
1647    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1648      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1649    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1650    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1651    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1652    o restore adjointability
1653    
1654    checkpoint53f_post
1655    o modifications that affect AIM experiment results (update output.txt):
1656      - no advection of S at top interface Nr (pkg/generic_advdiff)
1657      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1658    o AIM pkg:
1659      - include stability function into surf.Flux derivative relative to Tsurf
1660      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1661    
1662    checkpoint53e_post
1663    o merged cylindrical coord configuration
1664    o added rotating_tank experiment
1665    checkpoint53e_pre
1666    
1667    checkpoint53d_post
1668    o faulks upgraded: re-generate output.txt that have changed:
1669       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1670    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1671    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1672    o added Sadourny discretization of Coriolis
1673      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1674      - re-enabled use of omega3 (useAbsVorticity)
1675    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1676      vector-invariant equations
1677      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1678    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1679      hopefully without new bugs
1680      - still to do: biharmonic friction for non-hydrostatic w
1681    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1682    o regenerated output for global_ocean_ebm (using -ieee)
1683    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1684      of mom_common/
1685      - simple re-arrangement of instructions within computing loop
1686    checkpoint53d_pre
1687    
1688    checkpoint53c_post
1689    o new version of coupler for AIM+thSIce and Ocean models
1690     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1691     - land: change Evaporation of snow
1692     - aim with thSIce: fix bug in snow-precip.
1693    o changes to calc_gw.F
1694     - bug fix for w^2 term near the bottom boundary
1695     - (hopefully) improve the lateral slip boundary condtions for use with
1696        partial/looped cells
1697      - because the bug fix changes two verification experiments anyway (exp5
1698        and plume on slope), change the lateral boundary condition from half slip
1699        to the value of no_slip_sides
1700    o ebm package wasnt quite up to the parallel task. Fixed that.
1701    o Adjoint of EBM package + verification
1702      * TLM OK
1703      * ADM not sufficient accuracy yet (needs further testing)
1704    
1705    checkpoint53b_post
1706    o Commiting new energy balance model to repository
1707      * package is pkg/ebm
1708      * verif. is verification/global_ocean_ebm
1709      * references are in ebm_driver.F
1710    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1711    C        Global thermohaline circulation. Part I:
1712    C        Sensitivity to atmospheric moisture transport.
1713    C        J. Climate 12(1), 71-82
1714    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1715    C        Global thermohaline circulation. Part II:
1716    C        Sensitivity with interactive transport.
1717    C        J. Climate 12(1), 83-91
1718    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1719    C        Destabilization of the thermohaline circulation
1720    C        by atmospheric eddy transports.
1721    C        J. Climate 7(12), 1870-1882
1722    o Will need long integration testing.
1723    checkpoint53b_pre
1724    
1725    o created pkg/mom_common in preparation for variable viscosity code
1726    o renamed and split ini_mnc_io
1727    o pkg/land: only liquid water can diffuse or run-off
1728    o AIM using land: soil wetness availability account for snow
1729    o added printMapIncludesZeros to EEPARMS namelist
1730    
1731    checkpoint53a_post
1732    o restore TAMC compatiility for exf_constants.h
1733      (no usage of _d in .h)
1734    o Additional storing in KPP in an attempt to fix
1735      TAMC problem with adjoint of KPP code.
1736      (no success...)
1737      Identical code works fine with TAF.
1738    o Fixed verification/natl_box_adjoint experiments.
1739      Initial conditions for Experiments 4 and 5 are now
1740      set to "SEAICE_initialHEFF=0", which is more reasonable,
1741      and hence gives results closer to that of Experiment 2.
1742      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1743    
1744    checkpoint53
1745    o stable checkpoint with up to date adjoint
1746      TLM tests only run for 1st grdchk at the moment. Its unclear if
1747      this is a code problem or a problem with resetting code for g_
1748      variables that is being autogenerated wrong.
1749      Otherwise:
1750       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1751       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1752         are both still in chaos following their security messes.
1753    
1754    checkpoint52n_post
1755    o various build (mostly genmake2) changes including:
1756      - ability to build/run more easily within Cygwin and MacOS X
1757      - more complicated Makefiles with a stronger dependence on Gnu Make
1758    o pkg/seaice modifications
1759      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1760        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1761        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1762      - changed proxy for geostrophic velocity and updated
1763        verification/lab_sea/results/* accordingly
1764      - removed ADI dynamic solver from pkg/seaice
1765      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1766        they caused a segmentation fault under certain circumstances
1767      - removed unused field WATR
1768    o bug fix in exf-package:
1769      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1770         now reflect that.
1771    o small fixes in the cal-package:
1772      - set reference date to first of January for the 'model'-calendar
1773      - failing of cal_CheckDate in cal_FullDate now actually results in a
1774        warning
1775    o small modifications in exf-package to increase flexibility:
1776      - change climtempfreeze from a constant to a runtime parameter that
1777        is specified in data.exf_clim (default = -1.9)
1778      - introduce runtime parameter windstressmax (default = 2.0) that is
1779        specified in data.exf
1780    o fix in pkg/thsice:
1781      - update Evap (Tsf changes) to be consistent with Latent heat flux
1782      - maintain snow precipitation unchanged (even if Tsf >=0).
1783     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1784    
1785    checkpoint52m_post
1786    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1787      this does not change any of the results, because myIter=0 in swfrac always
1788      lead to jwtype=2 (the default anyway), but the call makes little sense
1789      as a default
1790    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1791    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1792      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1793    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1794    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1795    o extending useSingleCpuIO option to work with new exch2 I/O format
1796      - old-style, missing-tile I/O is still accessible by defining CPP
1797        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1798    o monitor package can write to NetCDF files and/or STDOUT
1799    o fix re-definition bug in MNC_GRID_INIT_ALL()
1800    o doc/api_reference added
1801      - a framework for building an API Reference Manual using all
1802        the "protex" comments embedded in the code
1803      - see pkg/generic_advdiff, pkg/mnc for examples
1804    o MNC:
1805      - make myThid the last argument for all subroutines
1806      - new default for the grid files: NO halos
1807      - add useMNC and other run-time flags
1808      - separate per-file-group handling of the unlimited dimension
1809      - early initialization of MNC w/ flags read at the eeboot stage
1810        and lookup tables set in initialize_fixed
1811      - write all MNC output to a freshly-created directory
1812    o thermodynamics sea-ice (thsice) is now tested with testreport.
1813    o test exp. advect_cs: use the standard cs32 grid ; update output.
1814    o Added functionality to grdchk:
1815      pick global i,j,k position (or nearest wet) where to perform check.
1816    
1817    checkpoint52l_post
1818    o new land formulation:
1819      a) use ground enthalpy as prognostic variable to ensure exact
1820         energy conservation.
1821      b) account for water temperature and for latent heat of freezing
1822         in all processes (rain, run-off, ground storage)
1823      c) compute surface and ground temperature implicitly.
1824    o aim_v23 modification for new land model:
1825      a) Treat separately land / ocean / sea-ice surface fluxes
1826         to allow implicit computation of land & sea-ice surface temp.
1827      b) add snow precipitation.
1828    checkpoint52l_pre
1829    
1830    o fix problem (when 1 tile is empty) in min/max monitor.
1831    o fix bug in timeAve (u,vZetatave in common block)
1832    o no restoring terms under ice for pkg/seaice
1833    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1834    o bug fix for pkg/seaice pickups
1835    o change MNC call locations and add coordinate attributes
1836    o mask vorticity at the corner ; affects global_ocean.cs output
1837    o fix ini_curvilinear_grid ; test CS experiments with mpi
1838    o aim.5l_cs: modify sea-ice fraction input file ; update output
1839    o exf: Adding simple range check routine for exf fields after read
1840    
1841    checkpoint52k_post
1842    o removed top-level directory "diags"
1843      - we migrated these functions to pkg/timeave a long time ago
1844    o fixed bug introduced in pkg/monitor
1845    o accuracy ctrlprec = 32 insuffient for gradient checks using
1846      averaged fields (I/O via cost_averages)
1847      -> use ctrl.h in active_file*.F to control I/O precision.
1848    o paramter list of CALL ADTHE_MAIN_LOOP
1849    o added initial do_the_model_io to ecco
1850    o set all ...Freq to zero after cost_final
1851      taveFreq, dumpFreq, pChkptFreq
1852    o MAIN and ECCO differentiability restored
1853    
1854    checkpoint52j_post
1855    o fix nchklev in tamc.h for global_ocean...
1856    o Bringing flow and store directives up-to-date
1857    o Really weird thing!
1858      call do_the_model_io from the_main_loop with parameters
1859      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1860      TAF places a faulty re-call of initialise_varia
1861      after cost_final call which should not be there!
1862    checkpoint52j_pre
1863    
1864    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1865      error messages
1866    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1867    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1868      debug output
1869    o modfied mdsio_writefield.F to handle non-global files under exch2
1870    o update AIM Cubed-Sphere exp (aim.5l_cs):
1871      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1872    o update AIM Equatorial Channel exp:
1873      use standard aim_v23 pkg and change the SST fields to be more realistic.
1874    o globalFile now works with exch2
1875    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1876      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1877    o limit timeave output for hi-res integrations
1878    
1879    checkpoint52i_post
1880    o removed CPP_EEOPTIONS.h from verification/*/code
1881    o updated the tiling for global_ocean_pressure
1882    checkpoint52i_pre
1883    
1884    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1885      the old pkg/aim).
1886    
1887    checkpoint52h_pre
1888    o shortened offending lines in exch2_send_rx?.template
1889    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1890    o genmake2: add build & execute test for NetCDF code
1891    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1892      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1893    o added useSingleCPUIO flag to monitor.F and mon_out.F
1894    o added temporary hack for sea-ice dynamics on the cube:
1895      metric terms are ignored and it is assumed that
1896      there is no sea-ice on cube faces 1, 2, 4, and 5.
1897    
1898    checkpoint52f_post
1899    o added exch2 cube routines to pkg/exch2
1900    o modified hs94.cs-32x32x5 to use it
1901    o added new grid files to hs94.cs-32x32x5
1902    checkpoint52f_pre
1903    
1904    checkpoint52e_post
1905    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1906      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1907    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1908      to work with implicit vertical advection and AB ;
1909    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1910    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1911     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1912    checkpoint52e_pre
1913    
1914    o fix bug in impldiff when Nr=1 or Nr=2.
1915    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1916    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1917    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1918      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1919    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1920    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1921    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1922    
1923    checkpoint52d_post
1924    o re-tiled many expts to allow comparison in multi-processor mode
1925      - updated output accordingly
1926      - changed hs94.128x64x5 to use intial T from file rather than use the
1927        random number generator
1928    o add infrastructure in model routines for fizhi and gridalt packages
1929    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1930    o changes to permit hi-res, cubed-sphere, configuration
1931      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1932      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1933      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1934        of surface winds for the cube
1935      (A verification experiment, based on global_ocean.cs32x15, but with
1936       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1937       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1938       complete with example surface forcing files and matlab scripts to look
1939       at the output and compare it with that of global_ocean.cs32x15.)
1940    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1941       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1942       to conform to the common rule.
1943    o check-in the first version of the coupler + interfaces for multi-components
1944       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1945       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1946       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1947       - ocean and atmos. share the same horizontal grid (no interpolation).
1948       - exchanges between component and coupler is done in forward_step
1949    o new verification experiment, cpl_aim+ocn:
1950       coupled ocean - AIM atmosphere on cs32 grid.
1951    
1952    checkpoint52d_pre
1953    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1954    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1955    
1956    checkpoint52c_post
1957    o Fixing OPTIONS files for use of exf:
1958      - ALLOW_ECCO not needed
1959      - ECCO_CPPOPTIONS.h should not be included from
1960        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1961        as has been the case in the past
1962      - All cal/exf related options are currently set in
1963        single header file. Should remain so until we
1964        agree on a consistent new policy.
1965    o Removed all CPP options for cal package.
1966      cal has no more CPP options.
1967    o modified STOREs in GAD_ADVECTION
1968    o corrected key comp. for passkey
1969    
1970    checkpoint52b_post
1971    o new version: "thsice" of thermodynamic sea-ice pkg:
1972     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1973     - modify fluxes but do not change theta directly;
1974     - light cleaning of bulk_force pkg (still needed with thsice).
1975     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1976       + output_thsice.txt to test thsice & bulk_force pkgs.
1977    o put back grid & coriolis monitor output.
1978    checkpoint52b_pre
1979    
1980    o call "do_the_model_io" at the beginning (=> dump initial state)
1981    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1982    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1983      (need info on NUMBER_OF_PTRACERS)
1984    o missing PTRACERS headers in some routines
1985    o default tamc.h in pkg/autodiff supposed to crash
1986      to ensure proper customization
1987    
1988    checkpoint52a_post
1989    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1990      - moved surfaceTendencyTice from pkg/seaice to main code
1991      - subroutine FREEZE_SURFACE now limits only surface temperature
1992        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1993        => new output.txt for global_ocean.cs32x15 & global_with_exf
1994      - keep the old version of FREEZE for backward compatibility;
1995        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1996      - corresponding modifs for TAF directives
1997    o added surface flux output variables to TIMEAVE_STATVARS
1998    o time-averaged output for pkg/ptracers
1999    o fix problem with ECCO-related divided adjoint
2000      snapshot file was missing some ad-variables,
2001      but no warning issued by TAF
2002    
2003    checkpoint52a_pre
2004    o some bug fixes for #undef REAL4_IS_SLOW
2005    
2006    checkpoint52 = ecco_c52_e35
2007    o after testing adjoints of checkpoint51u_post
2008    
2009    checkpoint51u_post
2010    o this is the post-merge tag of the ecco-branch
2011      (needs another clean checkout and re-testing)
2012    o various natl_box_adjoint configs and results
2013      but no input fields
2014    o obcs adjoint not yet merged!
2015    o adding ECCO global 1x1 and 2x2 degree configs
2016    o updated/extended some store directives for seaice
2017    o pkg/ecco now containes ecco-specific part of cost function
2018    o top level routines the_main_loop, forward_step
2019      supersede those in model/src/
2020      previous input data.cost now in data.ecco
2021      (new namelist ecco_cost_nml)
2022    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2023    
2024    checkpoint51t_post
2025    o this is the pre-merge tag of the ecco-branch
2026    
2027    checkpoint51s_post
2028    o cleanup: removed various obsolete #define-s
2029    o pkg/grdchk
2030      - renamed 'ph-grd 3' to 'grad-res'
2031      - merged from ecco-branch
2032        (remaining bug fixes for obcs gradient checks)
2033      - additional high-precision output for testreport
2034        (grep for 'precision_grdchk_result')
2035    
2036    checkpoint51r_post
2037    o cleaned up or removed CPP_OPTIONS.h files
2038    o updated results for some of the tests to reflect the new
2039      optfiles (-ieee: -O0 instead of -O3)
2040    
2041    checkpoint51q_post
2042    o cd_code:
2043      - moved cd_scheme.F -> cd_code_scheme.F
2044      - separate read_checkpoint from cd_code_ini_vars.F
2045      - separated cd_code part from write_checkpoint
2046      - updated AD_SOURCE, generated .flow
2047      - added CD_CODE_VARS.h to the_main_loop
2048      - Moving cd_code specific store dir.s to pkg/cd_code
2049    o ctrl package totally restructured
2050      - pack/unpack now optional and decoupled from
2051        xx_/adxx_ I/O
2052      - ctrl_pack/unpack cleaned
2053        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2054      - confined inclusion of AD_CONFIG.h to where necessary.
2055    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2056    
2057    checkpoint51p_post
2058    o create initial cd_code package
2059      - WARNING: the initialization of fields within packages
2060        is broken because INI_FIELDS (where READ_CHECKPOINT is
2061        called) is called *before* PACKAGES_INIT_VARIABLES.
2062        This seems to be backwards since
2063        1) its important to initially zero the entire field including
2064           the "halo" region
2065        2) zeroing needs to be done *before* reading pickup info
2066           and the pickup call might or might not happen in any
2067           particular run
2068      - this needs an overhaul for R2
2069    o cleanup verification/*/code/GMREDI_OPTIONS.h
2070    o cleanup testreport
2071    
2072    checkpoint51o_post
2073    o bringing AD-related verif's up to date with genmake2
2074      - carbon/
2075      - global_ocean.90x40x15/
2076      - hs.94.1x64x5/
2077      - (front_relax/ )
2078    o (more) consistent directory structure for AD-related verif.'s
2079    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2080    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2081    o bug fix in find_alpha.F for MDJWF:
2082      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2083        change rho -> rho-rhoConst
2084      - replace call find_rho to find_rhonum
2085    o initialisation of rFlx extended to full array (required by TAF)
2086      and shifted to thermodynamics
2087    o removed PTRACERS.h in ptracers routine
2088    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2089    o Correcting initialisations for fVerU, fVerV.
2090    o helping TAF to recognize dependency on kUp for
2091      fVerU, fVerV
2092    o Replacing delZ by delR in pkg/ctrl/
2093    checkpoint51o_pre
2094    
2095    o undid all of cp51 pending some cleanups and discussion
2096    o added the [#include "AD_CONFIG.h"] statement to all files that need
2097       it for adjoint/tl #defines
2098     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2099     o removed tools/genmake since it no longer works
2100    
2101    checkpoint51n_post
2102    o modifications to make FREEZE flux visible to pkg/kpp
2103      - moved surfaceTendencyTice from pkg/seaice to main code
2104      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2105      - subroutine FREEZE now limits only surface temperature
2106        (this means new output.txt for global_ocean.90x40x15,
2107         global_ocean.cs32x15, and global_with_exf)
2108    o added surface flux output variables to TIMEAVE_STATVARS
2109    
2110    checkpoint51n_pre
2111    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2112    o added [#include "AD_CONFIG.h"] to all files that use the following
2113      defines:
2114      - ALLOW_ADJOINT_RUN
2115      - ALLOW_TANGENTLINEAR_RUN
2116      - ALLOW_ECCO_OPTIMIZATION
2117    
2118    checkpoint51m_post
2119    o incorporating changes to get TAMC/TAF working in genmake2
2120      - added new TAMC/TAF targets to the Makefile
2121      - various cleanups related to package handling
2122      - these changes should have no impact on the forward model
2123    
2124    checkpoint51l_post
2125    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2126     - faster algorithm for cal_addtime.F
2127     - higher precision arithmetic, where needed
2128     - pkg/exf *startdate variables changed from calendar date to
2129       model integration time
2130    
2131    checkpoint51l_pre
2132    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2133    o enable to apply restoring on S & T only in a latitude band.
2134    o update output (external_forcing_surf modif. change truncation errors)
2135       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2136    
2137    checkpoint51k_post
2138    o change default to: useNHMTerms=.FALSE.
2139     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2140       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2141     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2142        exp1, ideal_2D_oce
2143     - change data file of oceanic exp (leave the results unchanged for now)
2144       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2145    o set gravitySign automatically according to the vertical coordinate used
2146      (and change sign: back to "logical" value: +1 when R increases downward)
2147    o added an include barrier to the default CPP_OPTIONS.h and
2148      removed the #include "PACKAGES_CONFIG.h" from it
2149    o fix a bug in mom_fluxform (from chk51j_post)
2150    
2151    checkpoint51j_post
2152    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2153    o adjusted some flow directives (dynamics, thermodynamics)
2154    o added cubed-sphere case to test cost function
2155    o heckpoint_lev?_directives.h now include
2156      pkg-specific directives, whenever those are enabled.
2157    o Moving pkg-specific flow directives to corresponding pkg
2158      Moving pkg-specific differentiation list to corresponding pkg
2159      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2160      ---> conventions are
2161           - pkg_ad.flow
2162           - pkg_ad_diff.list
2163           - pkg_ad_check_lev?_dir.h
2164    
2165    checkpoint51i_post
2166    o merge of the branch-genmake2
2167      - knowingly breaks the older genmake
2168      - automatic generation of all ALLOW_${PKG_NAME} defines
2169      - new testreport supersedes older testscript
2170    o large number of package inclusion and header cleanups
2171    checkpoint51i_pre
2172    
2173    o new output for adjoin of global ocean vector invariant
2174    o fix for checkpoint of thermodynamic seaice and bulk_force
2175    o Steph gchem various cleanups
2176    
2177    checkpoint 51h_pre
2178    o fixed some single quotes
2179    o modify gchem pkg to be more versatile
2180    o modifications to clean up dic pkg
2181    o add pkg/cfc
2182    
2183    checkpoint51g_post
2184    o provide links for ARPACK and ADM*TLM
2185    o start removing verification/vero/
2186    o update AD-related stuff
2187      (in particular some IF-statements in model/src/ routines)
2188    o adding to verification/global_ocean.90x40x15/ adjoint of
2189      vector invariant setup
2190    
2191    checkpoint51f_post
2192    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2193    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2194      of tracer Green's fucntions for ocean inversion project.
2195    
2196    checkpoint51f_pre
2197    o Added on-the-fly spatial interpolation capability
2198        "USE_EXF_INTERPOLATION" to pkg/exf.
2199      - This is a temporary Cartesian-grid hack until
2200        the super-duper ESMF coupler becomes available.
2201      - See verification/global_with_exf/README for usage example.
2202      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2203        flags and modified pkg/seaice accordingly.
2204    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2205        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2206        non-local transport term.
2207    
2208    checkpoint51e_post
2209    o pkg/mom_vecinv:
2210      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2211      - add time-ave diagnostic of vorticity advection.
2212    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2213    o atmospheric geopotential: - include water vapor effect;
2214                                - use p^kappa in p* scaling.
2215    o land pkg: read initial state from files.
2216    o AIM : add stratospheric drag in the upper level
2217    
2218    checkpoint51d_post
2219    o change function ILNBLNK (=> last non-blank char.) to return zero
2220      (instead of the string length) when the string. char is empty
2221    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2222    o modif's to restore TAMC compatibility
2223      - avoid "_d" constructs in PARAMETER declarations
2224      - avoid interrupting lines by comment lines
2225    o Use cluster local disks for purely local I/O
2226      vs. globally visible disks needed for ctrl stuff
2227      (merged from ecco-branch)
2228      - new active_file_loc... and mdsio_..._loc routines
2229      - affected packages: autodiff, ctrl, grdchk, mdsio
2230    
2231    checkpoint51c_post
2232    o introducing integer flag debugLevel
2233      - debLevZero: suppress all output
2234      - debLevA: standard
2235      - debLevB: equivalent to current debugMode=.TRUE.
2236    o introducing pathname variable mdsioLocalDir for mdsio
2237      that can be specified at runtime
2238      (relevant for cluster I/O to local disk)
2239    `
2240    >>>checkpoint51b_post
2241    adjoint of ptracers
2242    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2243    o extended state in checkpoint_lev?, etc.
2244    o alternative ctrl/cost with tr1 or ptracer
2245    o new comlev1_bibj_ptracers
2246    o new ptracers.flow
2247    o made ptracers_forcing same as external_forcing_s
2248    o added verification for adjoint with ptracers
2249      - adm. grdchk fail so far
2250      - tlm. grdchk OK
2251      - checked tapelev/comlev recomputations: OK
2252    <<<checkpoint51b_pre
2253    
2254    checkpoint51a_post
2255    o added code for biogeochemistry package
2256      - new pkgs: dic, gchem
2257      - new subroutine in ptracers
2258    o modify code for biogeo packages
2259      - in model/src and pkg/ptracers
2260    
2261    checkpoint51
2262    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2263      - autodiff, ctrl, exf, grdchk, seaice
2264      kept separate packages
2265      - cost, ecco, obcs
2266    o updating verification/internal_wave, verification/lab_sea
2267      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2268    
2269    checkpoint50i_post
2270    o Preparing next differentiable checkpoint and sync
2271      of MAIN vs. ecco-branch
2272      - 1st step: this one is differentiable
2273      - 2nd step: next(! not this) checkpoint will have updated packages
2274                  from ecco-branch)
2275    
2276    checkpoint50h_post
2277    o new package "land": provide surface BC for AIM.
2278    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2279    o AIM: use true log-P extrapolation for near surface temp (= as in
2280        F.Molteni paper) ; update aim.5l_cs output.
2281    o New variable in PARM03 for more flexible pickups
2282    o somewhat cleaned package initialisation sequence for
2283      ctrl/ cost/ ecco/ in packages_... routines
2284    
2285    checkpoint50g_post
2286    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2287      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2288      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2289        made the default because of faster convergence than ADI
2290    
2291    checkpoint50f_post
2292    o exf totally restructured
2293      - replaced all exf_set_ routines by one generic exf_set_gen.F
2294        and made sure it's still differentiable
2295      - split exf_getffields.F into new exf_bulkformulae.F
2296      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2297      - updated adjoint/makefile and relevant verif. accordingly
2298    
2299    checkpoint50f_pre
2300     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2301          + change Evap over land. (update aim.5l_cs output)
2302     o added missing .cvsignores and made uniform across expts
2303     o changed configuration of tidal_basin_2d expt
2304     o added pkg/debug functions for tracing code in fatal crashes
2305     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2306     o new fn in pkg/monitor to stop model if solution grows too big
2307     o removed lots of single quotes from comments
2308    
2309    checkpoint50e_post
2310    o make KPP work with PTRACERS
2311     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2312       nearly a copy of kpp_transport_s
2313     - there is no analogue to SurfaceTendencyS, so I have to use
2314       gPtr(of the surface layer) instead
2315    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2316    checkpoint50e_pre
2317    
2318    checkpoint50d_post
2319    o change kpp output from multiple-record state files to single-record state
2320      files analogous to write_state.F
2321    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2322      analogous to the cg2d-related output.
2323    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2324      so that writing to internal file fn (with length 512) fails.
2325    checkpoint50d_pre
2326    
2327    checkpoint50c_post
2328    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2329    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2330    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2331    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2332    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2333    
2334    checkpoint50c_pre
2335    Merging from release1_p13:
2336    o bug fix for pkg/seaice dynamic solver
2337    o Added SEAICE_initialHEFF to pkg/seaice
2338    
2339    checkpoint50b_post
2340    o store u*,v* in gU,V instead of in guNm1,gvNm1
2341    o in order to put the momForcing out of the Adams-Bashforth:
2342      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2343      to timestep.F
2344    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2345    o re-generate output for highly sensitive test-exp:
2346       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2347    
2348    checkpoint50b_pre
2349    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2350    o corrected CPP option mismatch in exf_Bulk... functions for case
2351      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2352    
2353    checkpoint50a_post
2354    o Bug fix for merging between c50 and KPP.
2355      ikey was passed from thermodynamics to kpp_calc via
2356      common block rather than being recomputed in kpp_calc,
2357      in contradiction with new key itdkey.
2358      New key ikppkey created, and tamc.h headers updated.
2359    
2360    checkpoint50
2361    - 2nd step of merge with ecco-branch:
2362      merge changes in ecco-branch back into main trunk
2363    - bug fix in find_alpha
2364    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2365    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2366    - merged some sliced AD support routines
2367    
2368    checkpoint49
2369    merged from ecco-branch:
2370    o exf:
2371      - Enable initialisation of forcing fields to constant
2372        (runtime) values.
2373      - in exf_getffields.F
2374        Reduce i-/j-loop to interior domain, discarding overlaps.
2375        That also fixes wrong TAF-key computations for key_1, key_2
2376        with bulf formulae.
2377      - exf_init.F modify #ifdef for exf_init_evap
2378      - exf_getffieldrec.F, ctrl_getrec.F
2379        The following INT-usages are not safe:
2380          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2381          fldcount = int(fldsecs/fldperiod) + 1
2382        and were modified.
2383    o autodiff: checkpoint_lev...
2384      - updated storing for bulk formulae (some arrays were missing)
2385      - added state for seaice package
2386      - synchronized with main branch
2387    o DIVA:
2388      Modif.s in
2389      - the_main_loop.F
2390      - the_model_main.F
2391      and added cost_final_restore.F cost_final_store.F
2392      o With these changes, it is possible to fully separate
2393        the first forward run to compute the cost function (mdthe_main_loop)
2394        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2395        into separate model executions.
2396        This enables better tuning of DIVA to given queue sizes.
2397      o Loss of cost function value in consecutive DIVA runs is
2398        fixed by storing to 'costfinal' file.
2399      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2400        beginning/end of adjoint integration is accounted for.
2401      The current changes apply to TAF-1.4.26.
2402      TAF has one remaining bug, requiring one manual change
2403      (see MITgcm manual).
2404    o cal: synchronized between MAIN and ecco-branch
2405    
2406    checkpoint48i_post
2407    o Changes to restore differentiability of code w.r.t. previous tag
2408      (mostly adding new routines to make list and replacing
2409      pressure by totPhiHyd).
2410    o Updated and merged grdchk package
2411      - has both ADM and TLM checks
2412      - works for single- and multi-proc.
2413      - output cleaned
2414      - worked successfully for parallel DIVA
2415    o genmake:
2416      - Adding -platform=SP4
2417      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2418    o Modif. for DIVA:
2419      ctrl_unpack should not be called in intermediate DIVA interval.
2420      (similar thing would apply for active files such as
2421      tbar, sbar, psbar, which should not be reinitialised;
2422      only relevant for ecco-branch)
2423    
2424    checkpoint48h_post
2425    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2426    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2427    o Added SEAICE_initialHEFF to pkg/seaice
2428    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2429    
2430    checkpoint48g_post
2431    --- EOS:
2432    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2433      store total Potential in totPhyHyd for diagnostics & EOS.
2434    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2435    --- Pressure/geopotential gradient:
2436    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2437    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2438      ( changes results of global_ocean_pressure )
2439    o NLFS + z-coord.: add eta*Rho' contribution.
2440    o accurate phiHyd when using interface-W at the middle between 2 centers
2441     ( changes results of ideal_2D_oce )
2442    o includes r* 2nd term in potential gradient.
2443    
2444    checkpoint48f_post
2445    Merging from release1_p12:
2446    o Modifications for using pkg/exf with pkg/seaice
2447      - improved description of the various forcing configurations
2448      - added basic radiation bulk formulae to pkg/exf
2449      - units/sign fix for evap computation in exf_getffields.F
2450      - updated verification/global_with_exf/results/output.txt
2451    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2452      (SBO) core products, including oceanic mass, center-of-mass,
2453      angular, and bottom pressure (see pkg/sbo/README.sbo).
2454    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2455      to avoid negative values in shallow regions.
2456      - updated verification/natl_box/results/output.txt
2457      - updated verification/lab_sea/results/output.txt
2458    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2459    o Added useSingleCpuIO option (see PARAMS.h).
2460    o Updated useSingleCpuIO option in mdsio_writefield.F to
2461      work with multi-field files, e.g., for single-file pickup.
2462    o pkg/seaice:
2463      - bug fix in growth.F: QNET for no shortwave case
2464      - added HeffFile for specifying initial sea-ice thickness
2465      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2466    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2467      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2468    o pkg/seaice:
2469      - adjoint-friendly modifications
2470      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2471    
2472    checkpoint48e_post
2473    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2474    o dynamics: change definition of computational domain & adapt mom_fluxform
2475      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2476    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2477        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2478        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2479        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2480        inverted_barometer solid-body.cs-32x32x1
2481      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2482    
2483    checkpoint48d_post
2484    o in preparation for r*:
2485     a) use pre-computed gradient of hydrostatic potential:
2486        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2487     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2488        => affects results of glob_oce_pressure (different truncation error)  
2489      update output.txt of ideal_2D_oce & global_ocean_pressure
2490    
2491    checkpoint48d_pre
2492    o in preparation for r*:
2493      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2494      pass the 2 comp. of the grad. as arguments to momentum S/R.
2495      but for the moment, only used if it does not change the results.
2496    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2497    
2498    checkpoint48c_post
2499    Modifications in treatment of initial flux forcing controls
2500    to avoid extra storing of flux fields.
2501    
2502    checkpoint48c_pre
2503    o Added tidal_basin_2d experiment (currently 1D!)
2504    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2505    
2506    checkpoint48b_post
2507    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2508     (modification to pressure gradient not yet implemented)
2509    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2510      (for U & V) that are used for vertical advection of momentum.
2511    
2512    checkpoint48a_post
2513    o In preparation for r*, use temp. array to compute vertical transport
2514       in flux-form momentum pkg. => change results of few test-exp.
2515      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2516                        lab_sea, natl_box & plume_on_slope
2517    
2518    checkpoint48
2519    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2520    
2521    checkpoint47j_post
2522    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2523    o moved adexch from forward_step to addummy_in_stepping
2524    o added exch in ctrl_map_...
2525    o aveFreq.=0. at end of cost_final to avoid overwrite in
2526      reverse checkpointing loop
2527    o Yet more changes in gmredi:
2528      * adgmredi_calc_tensor
2529        avoiding all recomputation of gmredi_slope_limit
2530      * adgmredi_x/y/rtransport
2531        added flag for excessive storing to avoid recomp. of
2532        u/v/rtans, dTdx/y/z
2533        -> this is not really necessary and very memory-consuming
2534      * adgmredi_slope_psi:
2535        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2536      * gmredi_slope_limit
2537        re-activated full calculation of taperfct for case 'ac02'
2538    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2539    
2540    checkpoint47i_post
2541    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2542    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2543      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2544    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2545    o gmredi: fix few bugs.
2546    
2547    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2548    This will be a good checkpoint to plug into the ecco-branch.
2549    o few modif.'s to get latest version adjointed
2550      (mainly kick out code in ini_linear_phisurf)
2551    o modif's to run adjoint with exactConserv
2552    o case GM_BOLUS_ADVEC should be cleaned
2553      S/R gmredi_slope_psi should be cleaned
2554    o verification/carbon now has exactConserv=.TRUE.
2555    
2556    checkpoint47g_post
2557    o time-average AIM output: becomes independent from statvars time-average
2558      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2559    o After TAF bug fix:
2560      Tested adjoint of gmredi package.
2561      Tests were done with checkpoint47 rather than with latest
2562      checkpoint47f_post since the latter is broken for the adjoint
2563      verification/carbon/ contains both ADM and TLM gradient checks.
2564    Here they are, before they get changed/lost/stolen.
2565    Mostly modif.'s to fix numerical sensitivities.
2566    Gradient checks OK for
2567    - GM_taper_scheme:
2568      * clipping
2569      * ac02
2570      * linear
2571      * glw91
2572      * dm95
2573      * ldd97
2574    - GMREDI_OPTIONS:
2575      * GM_VISBECK_VARIABLE_K
2576      * GM_NON_UNITY_DIAGONAL
2577      * GM_EXTRA_DIAGONAL
2578      * GM_BOLUS_ADVEC
2579    in conjunction with data.gmredi parameters to be checked in
2580    in a few minutes under verification/carbon/code/
2581    
2582    checkpoint47f_post
2583    Merging from release1_p10:
2584    o modifications for using pkg/exf with pkg/seaice
2585      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2586        and SEAICE_EXTERNAL_FLUXES
2587      - pkg/exf CPP options EXF_READ_EVAP and
2588        EXF_NO_BULK_COMPUTATIONS
2589      - usage examples are Experiments 8 and 9 in
2590        verification/lab_sea/README
2591      - verification/lab_sea default experiment now uses
2592        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2593    
2594    checkpoint47e_post
2595    o created a tag prior to creating a branch
2596    
2597    checkpoint47d_post
2598    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2599      at the bottom boundary had an erroneous half slip boundary condition
2600    o added bottom drag and no slip boundary condition capabilities to
2601      oceanic pressure coordinates code
2602    o added new verification experiment global_ocean_pressure, this experiment is
2603      also described in the tutorial section of the manual
2604    checkpoint47d_pre
2605    
2606    checkpoint47c_post
2607    o Added a verification experiment for a global cubed-sphere ocean run
2608      -  verification/global_ocean.cubed32x32x30
2609      -  uses pkg/therm_seaice and pkg/bulk_forcing
2610    
2611    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2612    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2613      when using P-coordinate; only implemented for atmospheric config.
2614    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2615      NOTES: requires option NONLIN_FRSURF to be "#define".
2616    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2617    
2618    checkpoint47b_post
2619    Merging from release1_p9:
2620    o pkg/seaice
2621      - removed GOTO's and added taf directives
2622      - double precision constants to reduce the g77 (Linux)
2623        to F77 (SGI) differences reported in release1_p8
2624    o tools/genmake
2625      - added SGI options
2626    o verification/testscript
2627      - updated to that of checkpoint47a_post
2628    o verification/global_ocean.90x40x15/input/eedata
2629      - modified for SGI f77 compatibility
2630    o verification/lab_sea
2631      - added description of sea-ice model
2632      - added missing matlab routines
2633      - added test of thermodynamics parallelization
2634    
2635    checkpoint47a_post
2636    o new pkg: aim_v23
2637     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2638       for now, keep the same surface forcing as before.
2639     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2640     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2641     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2642    o add diagnostic of surface correction term in monitor output
2643    
2644    o bulk_force and therm_seaice
2645    - Two packages:  bulk_force (Bulk forcing)
2646      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2647    - Earlier integration from Stephaine Dutkiewicz
2648      and Patrick Heimbach.
2649    - Two ifdef statements for compile time,
2650       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2651    
2652    checkpoint47
2653    differentiable version of checkpoint46n_post
2654    o bug fix in quasihydrostaticterms
2655    o * "clean" adjoint code (in terms of extensive recomputations)
2656        can now be obtained for all GMREDI options (i.e. for
2657        - GM_VISBECK_VARIABLE_K
2658        - GM_NON_UNITY_DIAGONAL
2659        - GM_EXTRA_DIAGONAL
2660        - GM_BOLUS_ADVEC )
2661      * However, wrong gradient check problem remains unsolved.
2662      * New CPP options have been introduced for different
2663        tapering schemes
2664    o external_fields_load now part of differentiation list
2665    o pressure needs multiple storing;
2666      would be nice to have store_pressure at beginning or
2667      end of forward_step, e.g. by having phiHyd global (5-dim.)
2668      (NB: pressure is needed for certain cases in find_rho,
2669      which is also invoked through convective_adjustment).
2670    o recomputations in find_rho for cases
2671     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2672    o #define ATMOSPHERIC_LOADING should be differentiable
2673    o ini_forcing shifted to begining of initialise_varia
2674    o Incorporating QNVS line search routines into MITgcm
2675      (this is separate code, and therefore not under pkg)
2676      lsopt/, optim/
2677    o Updated verification/carbon/
2678      - #define GM_VISBECK_VARIABLE_K
2679      - GM_taper_scheme    = 'ldd97'    
2680    
2681    checkpoint46n_post
2682    Merging from release1_p8:
2683    o verification/natl_box:
2684      updating new external_fields_load routine
2685    o New package: pkg/seaice
2686      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2687      The sea-ice code is based on Hibler (1979-1980).
2688      Two sea-ice dynamic solvers, ADI and LSR, are included.
2689      In addition to computing prognostic sea-ice variables and diagnosing
2690      the forcing/external data fields that drive the ocean model,
2691      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2692      The implied surface heat flux is then stored in variable
2693      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2694      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2695      non-local transport term.  Because this call precedes model
2696      thermodynamics, temperature under sea-ice may not be "exactly" at
2697      the freezing point by the time theta is dumped or time-averaged.
2698      N.B.: fairly large differences in accuracy occur across
2699            different platforms/compilers; comparison between
2700            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2701            generated output gives:
2702       T           S           U           V
2703      C D M    c        m  s        m  s        m  s        m  s
2704      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2705      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2706      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2707    
2708      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2709    o GAD:
2710      - generated new common blocks to account for call of
2711        same gad routines with differing traceridentities
2712        (needed to modify tracerIdentity indices in GAD.h)
2713      - generated separate common blocks for case useCubedSphereExchange
2714        (Department of Futurology)
2715      - parameter lists to gmredi_?transport: added tracerIdentity
2716      - added new key indices to tamc.h
2717    o external_fields_load:
2718      - added this routine to TAF list
2719      - needed to make some common blocks global and additional storing
2720        along the same lines as exf package (checkpoint_lev?_directives.h)
2721    o exf:
2722      updated external forcing package
2723      - bug fixes carried over from ecco-branch
2724        (missing OBCS_OPTIONS.h in two routines)
2725      - enable easy to use "no forcing".
2726      - added exf I/O for atmospheric loading
2727      - added exf I/O for runoff data
2728      - transfered scaling between exf <-> MITgcm to exf namelist
2729    o Adding new verification experiment global_with_exf.
2730      This verification experiment is almost identical to the
2731      global_ocean.90x40x15 experiment, except that it uses
2732      the exf (and cal) package instead of the
2733      external_fields_load routine (cf README file).
2734    
2735    checkpoint46m_post
2736    o modified testscript to return -- when there are no lines of "%MON" output
2737    o added new flag "quasiHydrostatic" for QH mode
2738      and new routine quasihydrostaticterms()
2739    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2740      New routine: mom_u_coriolis_nh()
2741    o fixed sign of non-hydrostatic metric terms in u and v equations.
2742      Depend on correct sign of gravitySign.
2743    o added work.pc* to .cvsignore in aim directories using ifc
2744    o introduced flag for controllin non-hydrostatic metric terms
2745    o removed gravitySign from PARM04
2746    o switched to g77/ifc from pgf77 in aim experiments
2747    
2748    checkpoint46l_post
2749    o made convective adjustment work with pressure coordinates:
2750     - changed the direction of k-loop in convective_adjustment.F for the
2751       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2752     - adjusted the reference pressure k-index in convective_adjustment.F
2753     - adjusted the convection condition in convect.F (in analogy to
2754       calc_ivdc.F)
2755     - convective_adjustment no longer computes anything on the halos
2756     - removed the warnings about negative salinity from find_rho.F and
2757       find_alpha.F; instead the new routine look_for_neg_salinity, called
2758       at the beginning of find_rho, find_alpha, and find_beta, does a
2759       check of the entire slice, if CPP-option
2760       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2761    checkpoint46l_pre
2762    
2763    checkpoint46k_post
2764    o fixed the verification/global_ocean.90x40x15 experiment:
2765     - new bathymetry (the world according to A., JMC, and M.)
2766     - new initial fields and forcing fields (*.bin files)
2767     - new POLY3.COEFFS (for the next release one should switch to a full
2768       equation of state: JMD95P or MDJWF)
2769     - fixed several errors and redundancies in the data file
2770     - experiment uses looped cells
2771     - added matlab directory with diagnostic scripts for plotting of output
2772    
2773    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2774     - read AIM physics parameters from a file (data.aimphys)
2775     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2776    
2777    checkpoint46j_post
2778    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2779    o move wVel computation at the end of the time step, in S/R integr_continuity
2780    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2781    o update timeave pkg for wVel diagnostic.
2782    checkpoint46j_pre
2783    
2784    checkpoint46i_post
2785    o Clean up AIM package (and keep the results unchanged):
2786      include CPP_OPTION and use IMPLICT NONE in all routines ;
2787      declare all the variables _RL ; use _d 0 for all numerical constants.
2788      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2789    
2790    checkpoint46h_post
2791    o cleaned up the use of rhoNil and rhoConst.
2792      - rhoNil should only appear in the LINEAR equation of state, everywhere
2793        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2794        and the dynamical equations are all divided by rhoConst
2795    o introduced new parameter rhoConstFresh, a reference density of fresh
2796      water, to remove the fresh water flux's dependence on rhoNil. The default
2797      value is 999.8 kg/m^3
2798    o cleanup up external_forcing.F and external_forcing_surf.F
2799      - can now be used by both OCEANIC and OCEANICP
2800    checkpoint46h_pre
2801    
2802     Added code to convert surface volume flux (fresh water) into
2803     a mass flux when using P coordinates in the ocean (OCEANICP).
2804     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2805    
2806    checkpoint46g_post
2807    o Include a new diagnostic variable phiHydLow for the ocean model
2808      - in z-coordinates, it is the bottom pressure anomaly
2809      - in p-coordinates, it is the sea surface elevation
2810      - in both cases, these variable have global drift, reflecting the mass
2811        drift in z-coordinates and the volume drift in p-coordinates
2812      - included time averaging for phiHydLow, be aware of the drift!
2813    o depth-dependent computation of Bo_surf for pressure coordinates
2814      in the ocean (buoyancyRelation='OCEANICP')
2815      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2816        Theta, Salinity, and Pressure in the parameter list. This routine is
2817        presently contained in find_rho.F. This routine does not give the
2818        correct density for 'POLY3', which would be a z-dependent reference
2819        density.
2820    o cleaned up find_rho
2821      - removed obsolete 'eqn' from the parameter list.
2822    o added two new verification experiments: gop and goz
2823      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2824    checkpoint46g_pre
2825    
2826    checkpoint46f_post
2827    o Enable tangent linear (forward mode) gradient checks:
2828      - extended active file handling to g_... files
2829      - added TANGENT_SIMULATION to theSimulationMode
2830      - extended grdchk package accordingly
2831    o added tangent linear setup in verification/carbon/code_ftl
2832    o added adjoint setup in verification/front_relax/code_ad
2833    
2834    checkpoint46e_post
2835    o Added new equation of state -> MDJWF
2836      - EOS of McDougall et al., 2002, JAOT, submitted
2837      - caveat: the equation of state is only valid for a smaller (more
2838        realistic?) range of values than JMD95P/Z and UNESCO
2839      - added masks to the calculation of pressure in store_pressure
2840      - added more check values for density in check_eos (ini_eos.F), some of
2841        the old check values are out of the range of the MDJWF-eos, so don't
2842        expect perfect matches for those
2843    checkpoint46e_pre
2844    
2845    checkpoint46d_post
2846    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2847      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2848      case of pressure coordinates. eosType='JMD95Z' in
2849      combination with buoyancyRelation='OCEANICP' now causes an error.
2850    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2851      in find_alpha/beta.
2852    checkpoint46d_pre
2853    
2854    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2855      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2856    
2857    checkpoint46c_post
2858    o Changes necessary for ocean in p-coordinates
2859     -  Added new buoyancy relation = 'OCEANICP'
2860     -  Added new parameters = gravitySign (this used to be contained inside
2861        the factor dRdZ which I added when we first switched to R coordinates).
2862     X GM/Redi is not compatible (yet)
2863     X bottom drag and no-slip need to be debugged.
2864    checkpoint46c_pre
2865    
2866    checkpoint46b_post
2867    o Added new equation of state -> JMD95Z and JMD95P
2868      - EOS of Jackett and McDougall, 1995, JAOT
2869      - moved all EOS parameters into EOS.h
2870      - new routines ini_eos.F, store_pressure.F
2871    o Added UNESCO EOS, but not recommended because it requires
2872      in-situ temperature (see JMD95)
2873    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2874      unesco.f to be used with POLY3
2875    checkpoint46b_pre
2876    
2877    checkpoint46a_post
2878    o Added (atmospheric) pressure loading
2879      - new field in FFIELDS.h, etc...
2880      - new cpp flag ATMOSPHERIC_LOADING
2881    o Changed hFacC to _hFacC in calc_phi_hyd.F
2882    o Added SHORTWAVE_HEATING to some files for consistency
2883    checkpoint46a_pre
2884    
2885    checkpoint46
2886    further merges from release1_p5
2887    o new ctrl package
2888      - adopted from ECCO environment to enable optimization
2889      - added Eliassen Palm fluxes to controls
2890    o added Eliassen Palm flux controls to gradient check package
2891    o cost package
2892      - Compatible with new ctrl package
2893      - added Eliassen Palm cost hooks
2894      - modif's of existing cost functions
2895    o Adjoint-related bug fixes in kpp:
2896      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2897      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2898    o autodiff package
2899      - flow directives:
2900        + new for S/R do_the_model_io
2901        + enhanced for S/R checkpoint
2902        + new gmredi.flow
2903      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2904        disable adcommon.h/g_common.h by default.
2905      - fixed problem for adjoint of global_max
2906    o modified verification/carbon/
2907    o New setup for adjoint of global_ocean
2908    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2909    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2910    o incorporated hooks for sponge layer code (external_forcing.F)
2911    
2912    checkpoint45d_post
2913    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2914    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2915      (affects plume_on_slope "cg2d" output)
2916    o add new parameter deltaTfreesurf for free-surface time stepping
2917    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2918    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2919    o change phiMin in exp1 (to agree with documentation)
2920    o add new flags:
2921     - T,S forcing inside/outside Adams-Bashforth
2922     - turn off temp,salt advection and/or forcing
2923     - for each tracer, define internal flag for multiDimAdvection & A-B
2924    o monitor: change definition of KE to check conservation of Energy
2925    
2926    checkpoint45c_post
2927    o Removed f90 comments ("!")
2928    o Modified initialisations to enable exf package for MITgcm
2929      (without invoking ECCO_PACKAGE).
2930    o modifications to gradient check package (Martin Losch)
2931      - enable centered differences
2932      - modified format of standard output
2933    
2934    checkpoint45b_post
2935    o cleaned exchange calls in cg2d
2936    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2937    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2938      to configure barotropic setup (Martin Losch)
2939    o moved some initialisations within bi,bj loop in dynamics
2940      (TAF flow dependency)
2941    o in initialise_varia, moved call packages_init_variables
2942      before convective_adjustment_init
2943      (corresponding adjustment of TAF tape initialisation).
2944    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2945    
2946    checkpoint45a_post
2947    o compute Rho over the whole domain (extend iMin,jMin indices)
2948    o specific exchange for X-slice domain (case Ny=1)
2949    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2950    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2951    
2952    checkpoint44h_post = checkpoint45
2953    o Fix to restore differentiability:
2954      place at which packages_init_variables is called in
2955      initialise_varia is crucial for reverse control flow.
2956    o modifications in GMRedi to enable stable adjoint
2957      (corresponding modif's in thermodynamics, dynamics)
2958    o added missing hook for sponge layer code in external_forcing
2959    o modified test cost functions
2960    o storing in gad_advection (plus removal of write(0,*)!
2961    o missing headers TR1.h added in convective_adjustment routines
2962    o errorMessageUnit set non-equal zero in eeboot
2963      (conflict on some platforms, e.g. IBM SP3)
2964    o modified carbon verif.
2965    
2966    checkpoint44h_pre
2967    o vertical grid option: allow to put the Interface at the middle between
2968      2 cell-centers ; replace delZ in pkg/kpp by drF.
2969    o GM Advective form: Tracers are advected using the residual transport (=
2970      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2971    
2972    checkpoint44g_post
2973    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2974      results) ; ifdef missing in thermodynamics.F
2975    
2976    checkpoint44f_pre,checkpoint44f_post
2977    o added PTRACERS package
2978      This allows an arbitrary number of passive tracers to be integrated
2979      forward simultaneously with the dynamicaly model.
2980      + Implemented so far:
2981        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2982        - I/O and checkpointing
2983        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2984      + Not implemented so far:
2985        - KPP
2986        - OBCS
2987      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2988        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2989        line in data.pkg.
2990      + This package is disabled by default since it increases storage.
2991    
2992    
2993    o testscript: added -cleanup option
2994    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2995                 b) enable to filter 2D fields.
2996    
2997    checkpoint44e_pre,post
2998    o re-wrote convective adjustment to use pre-calculated weights
2999      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3000      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3001      Original calls to convect() still in place.
3002    
3003    chkpt44d_pre,post
3004    o added missing EXCLUDE_MONITOR flags
3005    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3006      (incompatible typ in MIN/MAX expressions caused problems
3007      on IBM SP3)
3008    o in genmake added variable MAKEDEPEND
3009      plus resetting for case SunOS
3010    o added timer_stats.c routine for IBM SP3
3011    o removed variables in dynamics
3012    !!! I forgot to create tag chkpt44d_pre !!!
3013    !!! But chkpt44d_pre = chkpt44c_post    !!!
3014    
3015    o real fresh water flux implemented with non-linear free-surface.
3016    
3017    chkpt44c_pre,post
3018    o few fix (mask in shap_s2, EmPmR in external_field_load,
3019      USE_NATURAL_BCS in solve_for_P);
3020    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3021    
3022    checkpoint44b_pre/_post
3023    o merge of relevant stuff from the ecco-branch:
3024      - genmake: removed $S64 overwrite for case SunOS
3025      - pkg/exf: update and corrections for field swapping and obcs
3026      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3027                  harmonized between ECCO and MITgcm
3028      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3029                      updated checkpointing_lev... lists for obcs
3030      - model/src: minor changes in forward_step, plot_field
3031                   added directive for divided adjoint in the_main_loop
3032      - pkg/mdsio: added mdsio_gl_slice
3033    
3034    o check parameters & config (chkpt44a_pre,post)
3035    o OBC and NonLin_FrSurf.
3036    
3037    checkpoint44
3038    o fix bug in mom_vi_del2uv
3039    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3040    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3041    o update AIM experiments (NCEP input files)
3042    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3043    o added some stuff for AD
3044    
3045    checkpoint43
3046    o added two new advection tests
3047    o added global 4x4 degree ocean test
3048    o added test of H&S94 with free surface on cube
3049    o some final mods for gradient check, adjoint,...
3050    
3051    checkpoint42
3052      Fixed AD-related problems:
3053    o Store directives up-to-date with re-arranged Adams-Bashforth
3054      (mainly thermodynamics.F)
3055    o New store directives for multi-dim. advection schemes
3056      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3057      * new common block and key passkey
3058      (mainly gad_advection.F)
3059    o Modified store directives for split of dynamics/thermodynamics
3060      for the case ALLOW_KPP
3061    o Cleaned argument list for timestep_tracer.F
3062    
3063    checkpoint41
3064    o re-formatted/added comments in prologues of key subroutines
3065      to work with protex
3066    
3067    checkpoint40
3068    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3069    o added FLT (floats) package from Arne along with demo. experiment
3070    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3071      implementation of forward-in-time forcing terms
3072    o more mods for non-linear free-surface including new variable
3073    o modified multi-dim method to work on cube
3074    o bug fix in KPP (from DM)
3075    
3076    checkpoint40pre9
3077    o added DST advection schemes
3078    o fix MPI bug on SGI's
3079    o modifications for non-linear free-surface
3080    o fixed conditionals for fixed flow/passive tracer only mode
3081    o added tension/strain form of stress tensor
3082    o changes to commenting of arguments for TAF/TAMC
3083    o added/updated many matlab scripts
3084    o added multi-dimensional advection method for tracers
3085      
3086    checkpoint40pre8
3087    o new package rw/
3088      Added method for dumping intermediate local arrays:
3089      mdsio_writetile - same as mdsio_writefield except works from inside
3090                        bi,bj loop
3091      mdsio_writelocal - same as mdsio_writetile except works for local
3092                         arrays
3093      write_local_r? - higher-level wrapper for mdsio_writelocal
3094      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3095      Example given at end of mom_vecinv.F that dumps some local arrays.
3096    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3097      control flux-form versus vector invariant code.
3098      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3099      or genmake -DISABLE ...
3100    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3101      (additional storing is now needed for case vecinv;
3102      currently nothing implemented to switch this storing off
3103      in case fluxform is used since no CPP flag available).
3104    
3105    checkpoint40pre7
3106    o bug fix in dynamics.F
3107      calc_viscosity called before k=1,Nr loop.
3108    o added some #ifdef's ALLOW_PASSIVE_TRACER
3109    o cleaned initialisations in ctrl_map_ini
3110      related to TAF
3111    
3112    checkpoint40pre6
3113    o split dynamics into thermodynamics & dynamics
3114    o corresponding split of calc_diffusivity into
3115      calc_diffusivity, calc_viscosity
3116      (kpp_calc_diff, kpp_calc_visc).
3117    o Added diffkr, kapgm to control variables
3118    o bug fix in gmredi_slope_limit for ldd97
3119    
3120    checkpoint40pre5
3121    o proper initialization of Adams-Bashforth time stepping
3122      + uses forward step for very first step of model (iter=0)
3123    o re-generated *all* output since almost all output is modified by this
3124      change (sorry but we've been putting this one off for about 2 years)
3125      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3126        *not* regenerated since they are already out of date and I don't
3127        want to create the impression that they are suddenly working.
3128    o removed KAP stuff for DEC's
3129    o modified/added many .cvsignore files in */code and */input
3130    o added new expt "solid-body.cs-32x32x1"
3131      + this uses an alternative form of ini_curvilinear_grid.F which
3132        is not necessarily any better than the current one...
3133    
3134    checkpoint40pre4
3135    o added re-initialisations of utrans,vtrans,rtrans in
3136      calc_common_factors which are crucial for TAF.
3137    o extended iMin,jMin range for calc_common_factors,
3138      calc_diffusivity
3139    o added option ALLOW_PASSIVE_TRACER
3140    o a few minor updates and fixes
3141    
3142    checkpoint40pre3
3143    o created calc_gtr1.F for gad package
3144    o split the_main_loop and re-introduced forward_step
3145    o some recomputations of nIter0 for TAMC
3146    
3147    checkpoint40pre2
3148    o Updated to latest branch of AJA, JMC
3149    o Added gradient check package
3150    o Added routines for passive tracer handling
3151    o Added carbon sequestration sensitivity experiment
3152    
3153    checkpoint39
3154     o Modifications and fixes to support TAMC
3155       (mainly missing or wrong directives)
3156     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3157       in addummy_in_stepping
3158     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3159     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3160     o Included following packages:
3161       cal: calendar
3162       exf: external forcing
3163       ecco: essential routines to control use of cal, exf
3164             (NB: this is not the full ECCO environment)
3165     o disabled some packages by default in genmake
3166    
3167    checkpoint38
3168     o see notes_c37_adj.txt
3169     o corrected wrong layer index in external_forcing_t
3170     o replaced the_main_loop/forward_step by the_main_loop
3171     o removed forceoutput from write_state
3172       (replaced criteria for initial/final state)
3173     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
3174    
3175    checkpoint37
3176     o mdsio.F routine split and packaged in pkg/mdsio
3177       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
3178        used unless genmake -disable=mdsio)
3179     o allow a more precise surface-geopotential gradient for the atmosphere
3180       taking into account the change in space of Alpha (=1/rho) at the surface.
3181     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
3182       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
3183     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
3184       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
3185       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
3186     o Time-Average diagnostics defined as a pseudo package "timeave".
3187     o pickup files : old pickup (before c35) did not work with new code (c35
3188       and after) unless activating 2 commented lines in initialise-varia.
3189     o Non-Hydrostatic pickup file Pb fixed.
3190     o bug with Rigid-lid version (since c35) fixed.  
3191    
3192    checkpoint36
3193     o implement Crank-Nickelson barotropic time-stepping
3194     o recover Time-Average diagnostics
3195     o fix Pb in checkpoint (PR#19)
3196     o AIM become a standard package ; clean unused CPP_kees
3197    
3198    checkpoint35
3199     o subtantial rewrite of dynamics.f
3200     o allows staggered time-stepping
3201     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
3202     o added bottom drag (linear + quadratic)
3203    
3204    checkpoint34
3205     o Modified exchange routines for correct reverse simulation.
3206     o Added verification output to comply with bug fix in impldiff.F
3207       as of c33 (exp2, natl_box).
3208     o Corrected store directives in dynamics.F
3209     o Corrected array boundaries in impldiff.F
3210     o Corrected array dimensions in gmredi.
3211       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
3212     o Added routine GLOBAL_SUM_INT to global_sum.F
3213     o Added mdsio_gl.F for ECCO purposes.
3214    
3215    checkpoint33
3216     o Fixed bug in lower BC in impldiff.F
3217     o Fixed confusion about units of forcing arrays in FFIELDS.h
3218       namely Fu,Fv,Qnet,Qsw,EmPmR:
3219       - Removed verification/natl_box/code/external_fields_scale.F
3220         (did not differ from that in model/src)
3221       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
3222         (see FFIELDS.h for description)
3223       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
3224         kpp_calc.F and kpp_transport_t.F
3225       - Removed model/src/external_fields_scale.F and calls to it
3226       - verification/natl_box uses flux data with "atmospheric" sign so
3227         a special version of external_fields_load.F is used to
3228         change the data as it's read in. This way, the arrays
3229         have the right units and signs at all times tha a user could
3230         possibly use them.
3231     o Corrected genmake to delete a temporary file during configuration
3232    
3233    checkpoint32
3234     o Scaling of forcing fields moved from external_forcing.F to
3235       external_fields_scale.F, called directly after loading fields.
3236     o Surface relaxation terms added to surface tendency fields in
3237       extra subroutine.
3238     o impldiff.F changed to avoid storing by TAMC of huge intermediate
3239       fields.
3240     o Changes in GMRedi to comply with packaging structure.
3241     o Modifications and bug fixes in KPP package.
3242     o Verification experiment for KPP added (verification/nat_box/)
3243    
3244    checkpoint31
3245     o Packages interface brought in line with defined standard
3246       -> new routines packages_...F
3247       -> changes in initialise_fixed.F, initialise_varia.F
3248       -> enables initialisation interface for ECCO package
3249     o Rescaling of external forcing fields immediately after read
3250       (removed from external_forcing.F)
3251       -> new: surface_fields_scale.F
3252       -> affects ini_foorcing.F, external_fields_load.F
3253     o Computation of surface tendencies before tendency updates.
3254       -> new: external_forcing_surf.F
3255     o Change of variable names useGMRedi, useKPP, useECCO
3256     o Further changes in dynamics.F, impldiff.F for TAMC
3257     o Tested for experiments 0, 2, 4.
3258       - not yet tested for GMRedi.
3259       - not yet tested for KPP.
3260    
3261    checkpoint30
3262     o Updates for OBCs
3263     o New experiment for test OBCs (internal_wave)
3264     o New output.txt in verification/exp4/results/
3265     o Updates for KPP: calculation of viscosity corrected, new variables
3266       kpp_dumpFreq and kpp_taveFreq
3267     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
3268       and entry for T90 in genmake
3269    
3270    checkpoint29
3271     o packaged KPP and GM/Redi
3272    
3273    checkpoint28
3274     o Corrected initialization of hFacMin for difference vertical coordinates
3275     o Modified calculation of partial cell thickness to more robust algorithm
3276     o config_summary.F: replaced write_1D_... by write_0D_...
3277       read_write.F: added subroutines write_0D_...
3278     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
3279       included some initialisations required for TAMC.
3280     o routine calc_isoslopes: modified sqrt computation to make it
3281       differentiable for zero argument.
3282     o routines dynamics, impldiff:
3283       included store directives and tape key computations required for TAMC.
3284     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
3285    
3286  checkpoint27  checkpoint27
3287   o fixed calc_isoslopes() to so that cancellation of terms in tensor   o fixed calc_isoslopes() to so that cancellation of terms in tensor
3288     formulation works properly with variable resolution.     formulation works properly with variable resolution.

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