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revision 1.207 by dimitri, Thu Nov 13 06:35:13 2003 UTC revision 1.771 by mlosch, Thu Feb 15 14:57:36 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 modifications to make FREEZE flux visible to pkg/kpp  o move call to cal_readparms up to make calendar parameters/variable available
8      to all packages
9    
10    checkpoint58v_post
11    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
12      useDynP_inEos_Zc tested.
13    o pkg/exf: changes to properly interpolate/mask/scale initial fields
14    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
15      and portions thereof.  See read_cs.txt for description and examples.
16    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
17      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
18      following the great-circle arc between those 2 points.
19    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
20      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
21    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
22     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
23     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
24     - still needs work (not working with some options ; efficiency to improve)
25       and serious testing.
26     - use this scheme for temperature & salinity in 2 advection test exp.:
27       advect_xy & advect_xz, respectively.
28    
29    checkpoint58u_post
30    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
31    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
32    o testreport: add option "-skipdir" to skip some test.
33    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
34      momentum calculation.
35    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
36    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
37      remove checkpoint.F and the_correction_step.F (no longer used);
38      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
39    o add option (linFSConserveTr) to correct for tracer source/sink due to
40      Linear Free surface
41    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
42    o pkg/thsice: fix reading mnc-pickups
43    
44    checkpoint58t_post
45    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
46    o pkg/mdsio:
47     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
48       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
49       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
50     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
51     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
52       either MDS_READ_FIELD or MDS_WRITE_FIELD )
53     - new S/R (to replace MDSWRITEMETA), which allows to write more
54       informations (variable names, time ...) to meta files.
55     - modify rdmds.m to give back the meta file content.
56    o pkg/diagnostics: change vertical interpolation to be safer, and more
57       flexible (define p-levels to interpolate to in data.diagnostics);
58      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
59       diagnostic pointer.
60    o pkg/seaice: more cleaning up of seaice_growth, added many comments
61    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
62    o fix multi-category seaice:
63     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
64       SEAICE_MULTICATEGORY
65     - fix short wave heat flux
66    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
67       and allow to use EVP solver. Change forward lab_sea: test both EVP
68       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
69    o Initial check-in of lab_sea adjoint
70      (very similar to natl_box_adjoint/code_seaice)
71      * used C-grid and EVP solver
72      * used KPP, GM/Redi
73      * uses inAdExact=.TRUE.
74      * gradient checks fail for both ADM and TLM
75        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
76        f.d. gradients actually seem more problematic than ADM, TLM gradients;
77        issue is related to forward mismatch between g77 an ifort
78    o pkg/seaice: overhaul of thermodynamics
79     - growth.F and groatb.F are replaced by new routine seaice_growth.F
80     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
81     - move a few global fields out of SEAICE.h into seaice_growth.F and
82       make them 2D (FICE/QNETO/ ...)
83     - remove FO (it is the same as QNETO)
84     - introduce a few local fields to avoid modifying external fields such
85       as atemp, etc.
86    
87    checkpoint58s_post
88    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
89      changed exf_set_gen.F so that
90        genperiod=0 means input file is one time-constant field and
91        genperiod=-12 means input file contains 12 monthly means
92    o CG2D: use pre-computed solver main-diagonal (stored in common block);
93      this affects truncation error ; generate new output file for exp. which
94      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
95        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
96        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
97        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
98        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
99        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
100    o start implementation of deep-atmosphere and anelastic formulation
101    o verification: remove 2nd copy of input files and use script "prepare_run"
102      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
103    o mom_common/vecinv/fluxform: fix a few initialisation isssues
104    o profiles: fix for multithreaded case
105    
106    o diagnostics: rename few diags:
107      s/'PRESSURE'/'RCENTER '/g
108      s/'TICE    '/'oceFreez'/g
109      s/'TAUX    '/'oceTAUX '/g
110      s/'TAUY    '/'oceTAUY '/g
111      s/'SWFLUX  '/'oceQsw  '/g
112      s/DIFx/DFxE/g
113      s/DIFy/DFyE/g
114      and add few ocean-forcing diagnostics:
115      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
116    o modifications to pkg/seaice/growth.F and budget.F, which change results of
117      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
118      as actual snow thickness.  It now refers everywhere to effective snow
119      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
120    
121    checkpoint58r_post
122    o modifications to pkg/seaice/growth.F, which change results of
123      lab_sea experiment: fixes pertain to melting snow over open water, to
124      masking EVAP under sea ice, and to using the correct AREA variable for
125      computations of EVAP, PRECIP, HSNOW, and GHEFF
126    o add ability to read bathy, salt, and theta using MNC (off by def)
127    o add flooding algorithm and advection of HSNOW for pkg/seaice;
128      both are turned off by default and do no change any results
129    o seaice advection with pkg/thsice: a step toward the use of non-linear
130      advection scheme, but #ifdef or commented out for now (requires more EXCH).
131    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
132      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
133      in natl_box (affects results @ truncation level: update output.txt)
134    o multi-threading and IO:
135      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
136      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
137        (needed to work with SingleCpuIO): tested in all verif. exp.
138    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
139      affects the results (but none of the verification test uses this scheme).
140    o Adding some pkg/diagnostics capability to pkg/seaice
141      (will certainly be subject to changes)
142    o ctrl: adding new control variables:
143      lwflux, lwdown, evap, snowprecip, apressure, runoff
144    
145    checkpoint58q_post
146    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
147      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
148      high_res_cube configuration by 4% on Columbia.
149    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
150      add (in global_with_exf/code) a version of EXF_INTERP_READ without
151      dynamical allocation (seems to work in multi-threaded).
152    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
153      single CPU io) so that TAF does not have to see EESUPPORT.h
154    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
155    
156    checkpoint58p_post
157    o obcs: stop if obcs is used with useCDscheme = .true.
158    o shelfice:
159     - fix a sign error so that no slip at shelfice interface works
160     - remove stop for combination non-hydrostatic code and shelfice. That does
161       not mean, that the results are correct, but at least they are numerically
162       stable
163    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
164    o added adjoint exch routined for all exch*3d* routines
165      and updated flow directives
166    
167    checkpoint58o_post
168    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
169      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
170    o change controling S/R for writing pickup file (new S/R do_write_pickup)
171      and clean-up reading/writing of pickup files.
172    o fix local version of read/write pickup (NH part) in rotating_tank/code
173    o simplify EXCH interface:
174     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
175     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
176    o added the regrid package
177    o shelfice:
178     - add a simple boundary layer scheme to reduce noise
179     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
180    
181    checkpoint58n_post
182    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
183       local variable (not in common block).
184    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
185      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
186      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
187        to work with SingleCpuIO.
188    o add "_d 0" to real constant of pkg/cfc subroutines ;
189       update exp. cfc_exemple & tutorial_cfc_offline output files.
190    o multi-threading and IO:
191      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
192        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
193      - barrier before and after reading.
194      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
195      - avoid using MDS_WRITELOCAL for LAND pkg output.
196      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
197        common-block variables ; Allows multi-threading with master-thread IO.
198    o change default MAX_NO_THREADS from 32 to 4 ;
199      and stop cleanly when MAX_NO_THREADS is too small.
200    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
201    
202    checkpoint58m_post
203    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
204       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
205    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
206       keep global_ocean.90x40x15 (for AD testing) with former secondary test
207       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
208    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
209        add MITgcm_tutorials (= code + all the tutorials)
210    o ecco, option to compute cost for total ssh (mean+anom)
211    o consistent with addition of ptracer and ssh in pkg/profiles
212    o profiles: adding ptracer and ssh
213    o testreport: change multi-test output-file name
214      (from output.txt.{name} to output.{name}.txt)
215    o profiles: now ok for mutli-tiles case
216    o seaice: add 4 parameters for different advection schemes for area,
217      (effective) seaice thickness, enthalphy, and snow height. Their default
218      is the standard parameter SEAICEadvScheme
219    o calc_gw:
220     - add cosFacU in zonal viscous flux (harmonic.visc.).
221     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
222       of tutorial_plume_on_slope.
223    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
224    o calc_gw: true flux-form, account for horizontal grid spacing.
225      update rotating_tank results, but not plume_on_slope (affected at
226      truncation level, 11 digits).
227    
228    checkpoint58l_post
229    o calc_gw:
230     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
231     - remove side-drag for now (need to fix it); update plume_on_slope results.
232     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
233    o commit code to make SST/SSS weights spatially variable
234      (based on either variable in-situ or variable initial T/S weights)
235    o pkg/ecco:
236      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
237        now based on horizontally varying weights wthetaLev, wsaltLev
238      * cost_averagesflags now returns year indices in addition to day, month
239      * sflux balance is performed on annual basis
240        (sflxumm, sfluxmm2, bal_sfluxmm)
241      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
242        including separate counting and multipliers
243    o pkg/rbcs
244      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
245    
246    checkpoint58k_post
247    o testreport:
248     - always build in dir. "build" (if not there, mkdir build instead of building
249       & running in input)
250     - run in dir run (if it exists), in build otherwise.
251     - call prepare_run (if input/prepare_run exists)
252     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
253    o pkg/exf modifications to interpolation and rotation routines for more
254       reasonable treatment of North Pole singularity: for tracers North Pole
255       value is set to northernmost zonal-mean value, for zonal velocity it is
256       set to zero, and for meridional velocity it is set to northernmost value.
257    o pkg/exf/exf_check_range.F
258     - add tile index to diagnostics and move stop statement to the very
259       end of the routine.
260    o pkg/diagnostics: (diagnostics_main_init.F)
261      define title of isomorphic variables according to the current config.
262    o pkg/thsice with pkg/seaice dynamics:
263    - fix domain of computation (interior only, required for exf) and do exchanges
264    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
265    o towards a standard way of dealing with multi-threading in MONITOR
266      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
267    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
268       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
269    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
270    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
271    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
272       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
273    o tracer advection:
274     - clean-up and simplify calc_common_factors.F
275     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
276       advection subroutine (but still not used within DST advection S/R)
277    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
278    
279    checkpoint58j_post
280    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
281      from file (collects calls previously in FORWARD_STEP)
282    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
283    o adjoint store dir. adjusted accordingly
284    o genmake2
285      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
286    
287    checkpoint58i_post
288    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
289      on wind stress (SEAICEstressFactor defaults to 1.)
290    o Total number of Timers is finite (<=40): comment out 2 non-essential one
291      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
292    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
293      on CS-grid: no longer loosing mass.
294    o exf & curvilinear-grid: no longer modify longitude xC & xG.
295    o pkg/ggl90: fix sloppy output and fix a bug
296    o pkg/seaice: added SEAICEuseEVPpickup parameter
297      - Set to false in order to start EVP solver with
298        non-EVP pickup files when using SEAICEuseEVP
299      - fix sign error in diffusion in seaice_calc_rhs
300    
301    checkpoint58h_post
302    * Modifications for bottom topography control
303      o replace hFacC by _hFacC at various places
304      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
305      o add non-self-adjoint cg2d_nsa
306      o update autodiff support routines
307      o re-initialise hfac after ctrl_depth_ini
308      o works for 5x5 box, doesnt work for global_ocean.90x40x15
309    * Adding verification for 5x5 box (4-layer) bottom topography control
310    
311    checkpoint58g_post
312    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
313       used for mean seasonal cycle, mean diurnal cycle); add an example
314       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
315    o pkg/ggl90:
316      - add parameter (minimum surface kinetic energy)
317      - fix bug (avoiding division by zero)
318    o couple pkg/thsice to pkg/seaice:
319      - modify advection in seaice to accomodate new scalar fields to be advected
320      - only muliDimAdection scheme work with seaice/thsice
321      - mapping of thsice-variables to seaice-variables, back and forth
322      - does not break the verification experiments, but does not give the
323        desired results either
324    o pkg/seaice
325      - make (default) second order advection a bit less confusing?
326    
327    checkpoint58f_post
328    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
329      to pkg/seaice):
330      - new routines thsice_map_exf and thsice_get_exf provide the interface
331      - add an additional formal parameter to thsice_solve4temp
332    o pkg/exf:
333      - add new fields wspeed, snowprecip (to be able to couple to thsice)
334      - correct Stefan-Boltzmann constant
335      - new parameter for longwave surface emittance
336      - separate some stuff from exf_bulkformulae into new routines  
337        exf_radiation, exf_wind
338      - add new parameters and constants: longwave emissivity for ocean, ice
339        and snow, evaporation parameters over ice
340      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
341        either wind from stress or stress from wind
342    o pkg/thSIce:
343    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
344    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
345       and THSICE_CALC_THICKN
346    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
347    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
348      to make debugging easier.
349    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
350    o pkg/bulk_force:
351      - clean-up comments and parameters ;
352      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
353    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
354      generate new output for test-experiment: aim.5l_cs.thSI
355    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
356      testreport accordingly
357    
358    checkpoint58e_post
359    o SEAICE_CGRID adjoint done
360    o R_STAR adjoint implemented.
361      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
362      * need to sort out init. of h0facc, etc.
363    o Make pkg/profile fully independent of ecco,cost, etc. stuff
364      to be able to use it in pure forward.
365    
366    checkpoint58d_post
367    o upgrade simple test-experiment to tutorial example:
368     step.1: duplicate the experiment and (step.2) will remove the old copy.
369      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
370      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
371      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
372      tutorial_global_oce_biogeo    <- copy of dic_example
373      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
374      tutorial_plume_on_slope       <- copy of plume_on_slope
375      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
376      tutorial_global_oce_optim     <- empty for now (David ?)
377      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
378     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
379    o correct a sign problem in cost_scat.F
380    o obcs and ptracers: fix boundary conditions for advections schemes
381      with larger stencil
382    o thsice adjoint: start
383    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
384      completeness
385    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
386      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
387    o ptracers adjoint:
388      * avoid extensive recomputatations
389      * fix missing re-init. of gptr (missed by TAF)
390    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
391      me to turn off the excessive output to STDOUT that this package produces
392    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
393      and add those terms in Vector-Invariant formulation.
394    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
395      if the control period (xx_hfluxperiod etc) is 0
396    o in profiles pkg, clean routines and fix details
397    o in ecco pkg, reading ssh data:
398      fix problem in case the model does not start at iter0=0
399    o fix mnc-pickup/restart for ptracers
400    o new package prifiles:
401      code to compute profile-based cost by Gael Forget
402      (modifs in ecco, ctrl, autodiff)
403    o Benign bug fix in initialization (spotted by M. Mazloff) of
404      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
405    
406    checkpoint58c_post
407    o adjoint: finish NLFS adjoint and provide reference output in
408      verification/global_ocean.90x40x15/results_ad_nlfs
409    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
410      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
411      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
412      with SEAICE_CGRID defined.
413    o move calendarDumps from "data" to "data.cal" and clean-up the code
414      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
415    o add useEXF & useCAL flags (for now, set in hard-coded way)
416    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
417      (were missing in NH mode, and wrong in quasihydrostatic mode).
418      waiting for Chris updated version of calc_gw to add those CALLs.
419    o fix bug in quasihydrostatic S/R ;
420      add a test for this option: global_ocean.90x40x15.qshyd
421    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
422      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
423    o add on/off flag useOffLine for package OFFLINE
424    o seaice:
425      - modify advection so that it works also on the C-grid
426      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
427        problem in multi-tile runs with C-grid
428      - add flags for clipping ice velocities and/or masking solver forcing
429      - fix drag (ocean on ice) formulation and a bug that caused noise in the
430        C-grid solver
431      - added a few comments to seaice_diffusion.F
432      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
433        are now exclusive)
434      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
435        required re-ordering the code a little:
436       + make DAIRN global variable (defined in SEAICE)
437       + move computation of the viscosities eta and zeta into a new separate
438         routine (because I need to recompute them in seaice_ocean_stress.F)
439    
440    checkpoint58b_post
441    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
442      update output.txt of exp. aim.5l_cs.thSI
443    o various mnc cleanups and improvements:
444      + shrink lookup tables by factor of ~4
445      + better error reporting when running out of lookup space
446      + able to handle longer path/file names (up to 500 chars)
447    o adjoint:
448      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
449      - TBD: "hidden" mom_vecinv recomp. in dynamics
450    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
451     (allow to differentiate between forcing components using new integer flags:
452      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
453     and add new flag to put Dissipation tendency out of Adams-Bashforth.
454    o ecco
455      - enable trend removal from SSH anomaly obs.
456    o adjoint
457      - a fix for PmEpR when #undef EXACT_CONSERV
458      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
459      - try to fix "hidden" recomp. in forward_step for NLFS
460        (NLFS seems broken sometimes after I checked it in)
461    o seaice:
462     - add c-grid version of the dynamic solver:
463       + three new routines that are the c-grid substitute lsr, dynsolver
464         and ostres
465       + put a few fields that were local to dynsolver into global common
466         blocks, so that I can move the computation of stresses etc into
467         seaice_lsr (saves coding but may break the adjoint).
468     - replace more hardwired parameters by runtime parameters
469     - add ice masks that mask the rhs of the implicit solvers where there
470       is no ice (commented out in seaice_dynsolver, because i am not sure
471       if this works properly), eventually this should replace the clipping
472       of ice velocities in seaice_dynsolver to +/-40cm/s.
473    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
474      include it only where its needed
475    o move balancing of fluxes before the call of external_forcing_surf
476    o seaice:
477      - correct units of turning angles (now they are really in degrees)
478      - move computation of GWATX/Y out of main routine into dynsolver
479      - initialize GWATX/Y in seaice_init
480    o Apply mask on Fresh-Water flux (needed for SSH forcing).
481      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
482    o seaice: add runtime flags for turning angles (default to zero)
483    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
484      and trend from exf forcing and ctrl control adjustments
485    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
486      (since checkpoint57x_post)
487    o change the default rotation period to 86164.s = the Earth rotation
488    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
489      and based on a reference stratification. Tested within hs94.cs-32x32x5.
490    o seaice advection: add code for choosing between the default (2nd order
491      central differences) and multiDim advection schemes provided by
492      pkg/generic_advdiff
493    o seaice:
494      - removed all references to SEAICE_GRID.h fields from
495        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
496        (cubed-sphere configuration will change a little)
497      - grid computations in seaice_init are obsolete now.
498      - cleaned up code a little so that is easier to read (hopefully).
499      - added new (better?) discretizations of default advection and diffusion
500        (turn on with SEAICEuseFluxForm)
501      - replace 1 in 3d global fields by kSurface in growth.F
502      
503    checkpoint58a_post
504    o seaice:
505      - bug fix in advect.F
506    o shelfice:
507      - separate shelfice load anomaly from pload (breaks with time
508        dependent forcing), => introduce constant field shelficeLoadAnomaly.
509        Its default is 0., but it may be computed more cleverly from (unknown)
510        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
511        done offline. A good approximation of the pressure load anomaly is
512        necessary to avoid large initial adjustment processes underneath
513        deep-reaching shelfice.
514      - small fix in ISOMIP shelfice_thermodynamics
515      - add more sophisticated thermodynamics of Hellmer (1989), this is
516        now the default
517      - give a few constants more intuitive names
518    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
519      if bulk formulae are used in long integration (especially EmPmR). Turn
520      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
521      if balancePrintMean, the imbalance that is substracted is printed to
522      STDOUT.
523    o fix bug (typo) in obcs_apply_eta.F
524    o add a new package shelfice which enables us to model the circulation
525      underneath shelf-ice with draughts of hundreds of meters.
526     - works
527     - to do: + include improved thermodynamics
528              + check whether kSurfC (from model/inc/SURFACE.h) can be used
529                instead of new field kTopC
530              + can we use topoFile, Ro_surf and existing code in ini_depth.F
531                instead of new field R_shelfIce and new code in ini_depth.F
532                and ini_mask_etc.F?
533              + adjust vertical mixing schemes?
534    o seaice pkg:
535     - add a cpp-flag to include a simple formula for a salinity dependent
536       freezing point of sea water at the surface
537     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
538       meridional stresses are now different (and hopefully correct)
539    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
540       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
541       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
542    o pkg/diagnostics: add options and parameters for regional-statistics
543       diagnostics ; define regions by reading a region-mask from a file
544       (might add other options later)
545    o pkg/bulk_force:
546     - add option and parameters to use AIM surface-flux formulae.
547     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
548       others forcing fields (defined in PARM05, parameter file "data") are loaded
549       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
550     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
551     - use the right EXCH call for uwind,vwind (to work on CS-grid).
552     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
553       and parameters (note: calcWindStress replaces .NOT.readwindstress).
554     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
555    
556    checkpoint58
557    o add "--embed-source" option to genmake2 which, when the supporting
558      tools can be compiled (as determined by genmake2) will turn on the
559      embed_files package which then embeds the entire MITgcm source code
560      (*.[fFhc] + Makefile) used for the build within the executable
561      - requested by CNH but off by default
562      - adds a paltry <9MB to the mitgcmuv executable in most cases
563      - only writes the output when useEMBEDSRC in eedata is true
564    o clean up 3-dim. relaxation codes:
565      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
566      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
567      * Thanks to Tom Haine for testing!
568    
569    checkpoint57z_post
570    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
571      affects output (@ truncation level) of exp. plume_on_slope ; updated.
572    o fix the pickup behavior for obcs in combination with ptracers
573    o fix a bug in ptracers_external_fields_load
574    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
575      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
576    o transfered surface NH pressure to eta field (if exactConserv).
577    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
578         and update lab_sea output.txt file.
579    o completing 3-dim. relaxation code: additional term
580         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
581      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
582      * At compile time, in "EXF_OPTIONS.h" set
583          #define  ALLOW_CLIMTEMP_RELAXATION
584          #define  ALLOW_CLIMSALT_RELAXATION
585      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
586          tauThetaClimRelax3Dim = 15552000.0,
587          tauSaltClimRelax3Dim  = 15552000.0,
588      * 3 cases:
589          1) Use a constant-in-time 3-dim. field
590          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
591          3) Real-time relax. to time-evolving prescribed field
592    o Adding Laplacian-type smoothness constraint on
593      initial and boundary (forcing) controls (ic, bc)
594      * enable at compile-time via
595        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
596      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
597      * Absolute scale somewhat unclear so far
598      * no area weighting was included since no other cost term does so far
599    
600    checkpoint57y_post
601    First step for a NLFS adjoint
602    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
603    o new init. routines for calc_r_star, calc_surf_dr
604    o still need to deal with ini_masks_etc
605    o testreport seemed happy
606    checkpoint57y_pre
607    
608    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
609    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
610    o add new offset feature to offline pkg (plus minor cleanup)
611    o cfc fixes for final year of integration
612    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
613      be in GCHEM_OPTIONS).
614    
615    checkpoint57x_post
616    o fix testreport Pb in multiple test experiment.
617    o cleanup our namelist syntax in verification:
618      - make it more F95 standards compliant (some work still needed)
619      - allows the vast majority of our tests to work with gfortran
620    o Non-Hydrostatic:
621     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
622     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
623    o Allow to apply AB on T,S rather than on AB(gT,gS):
624     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
625     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
626       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
627     - need a "clever" read_pickup to restart from the other AB formulation
628    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
629    o remove some unused variables (reduces number of compiler warnings)
630    o adjoint
631      * Disable useVariableViscosity for adjoint for time being
632        (there are a number of extensive recomputations)
633      * Initialize certain variables needed for adjoint
634    
635    checkpoint57w_post
636    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
637                 fix the singleCpuIO RS version of MDSWRITEFIELD
638       and add a WARNING if using globalFiles=T with multi-processors.
639    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
640      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
641    o tracer advection scheme:
642      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
643       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
644       was not very convenient).
645      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
646       (further tests needed for the implicit DST & Flux-Limiter schemes).
647    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
648      and sRef for convenience, handy, when you want to initialize
649      ptracers in a large domain with a constant non-zero value. Also,
650      untangle ptracers_init.F a little.
651    
652    checkpoint57v_post
653    o change dome exp. to use variable viscosity in side-drag terms.
654    o remove all the files from the cfc_offline test since they are now
655      incorporated into tutorial_cfc_offline which has been producing
656      identical results for a few days of testing
657    o add new parameter: sideDragFactor to enable half-slip-side BC
658      and change side-drag S/R to use viscosity from mom_calc_visc
659      (can switch back by setting sideDragFactor=0.); affects results at
660      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
661       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
662    o vorticity & strain are now computed without masking, to account for
663      no-slip-side BC in variable viscosity calculation ; mask is applied
664      anyway later on, before computing advection/coriolis terms.
665    o modify exp4 to test new obcs support for reading from external files
666      and for passive tracers
667    o fix behavior of ptracers_monitor when monitor output is written to a
668      netcdf-file; still not independent of monitor.F (writes in the same
669      file).
670    o change default value of tRef (put a uniform, meaningful value for ocean
671      & atmos) and initialize sRef (was missing, as Martin mentioned).
672    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
673      to be proportional to enstrophy dissipation length.  Thus,
674       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
675      This is now consistent with Smagorinsky and with the manual.
676    
677    checkpoint57u_post
678    o OBCS and PTRACERS: add open boundary support for passive tracers
679      - either use homogenous (pseudo) v.Neumann conditions or prescribe
680        OB-values from file; this is not different from the way theta and salinity
681        are treated
682      - however, Orlanski-radiation conditions are not supported, and the model
683        will stop if you use pTracers and Orlanski at the same time.
684      - beefed up the rountine obcs_external_fields_load: now only those open
685        boundary values are overwritten with values from files for which there
686        are really files, otherwise the OB-fields remain untouched. This makes
687        it possible to use different OBs at different ends of the domain (as
688        with EXF)
689    o reduce number of exch calls in shap_filt (s2).
690    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
691      truncation level) 4/5 MLAdjust test results (11&12 digits match).
692    
693    checkpoint57t_post
694    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
695    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
696      same truncation, independent of the face number: affects affects several
697      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
698    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
699      note that biharmonic viscosity + no-slip was not tested in any experiment.
700    o fix bug in non-linear free-surf side-drag ; generate new output for
701      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
702    o make mnc honor the writeBinaryPrec flag for most kinds of output
703    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
704    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
705      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
706    o add brackets in multi-terms sum to get same truncation, independent of
707      the face number (manage to get exactly same value of gU,gV at the cs-edge)
708      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
709    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
710      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
711      a maximum grid-scale Reynolds number.  Also, changes all length calculations
712      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
713      Suggested values of viscosity parameters found in mom_calc_visc.
714      Many new viscosity diagnostics available.
715    
716    checkpoint57s_post
717    o Add clearing-house for viscosity calculations, mom_calc_visc and
718      correct numerous bugs in LeithD and Smagorinsky discretizations.  
719      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
720      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
721      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
722      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
723      The Strain-Tension form is now called with useStrainTensonVisc=.true.
724      ViscAhStrain and viscAhTension are now retired.
725    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
726    o In response to JMC's bug report, genmake2 now ignores any soft-links
727      that it finds in the *current* directory when searching for files.
728      Soft-links found in any other source directories will still work as
729      they did before.
730    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
731      a C routine to unlimit the stack size
732    o mnc-ify pkg/aim snapshot vars
733    o mnc-ify pkg/land as requested by Daniel
734    o various changes to mnc including:
735      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
736      - output can now be grouped so that all files within a group
737          change the ITER portion of their names in lock-step together
738      - can now read ("global") PER-FACE (in addition to PER-TILE) files
739          and works with both EXCH1 and EXCH2 (but needs more testing)
740      - writing works for all verification test cases w/ g77 on Linux
741    
742    checkpoint57r_post
743    o make MNC variable initialization happen earlier
744    o add diagnostics for (almost) each term of the momentum Eq.
745    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
746    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
747    o remove MINIMAL_TAVE_OUTPUT option ;
748      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
749    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
750      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
751    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
752    o add time-dependent SST, SSS control
753    o cost terms in ecco/ modularized (new cost_generic.F)
754    o cost_averages routines are modularized (new cost_averagesgeneric.F)
755    o new infrastructure for seaice model vs. obs misfits in seaice/
756      * driver from the_main_loop.F is seaice_cost_driver.F
757      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
758      * gradient check in Exp. 6a of natl_box_adjoint/
759    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
760      (see README file)
761    
762    checkpoint57q_post
763    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
764    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
765      - bug was reported by Jean-Michel and Ian Fenty
766    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
767      update exp. cpl_aim+ocn output.
768    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
769      Needed for high-res. runs with large global files
770      to be able to limit tapelev size
771    o Changed some tests for adjoint:
772      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
773      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
774      * global_ocean.90x40x15/ back to default 3-level checkpointing
775    o Modifications to enable scripted COMMON to MODULE conversion
776      * verification/OpenAD/code/ has necessary scripts and description;
777      * converts, compiles and runs successfully;
778    
779    checkpoint57p_post
780    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
781    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
782      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
783    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
784    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
785      (was already the case for dissipation with mom_vecinv,
786       and also the case for grad.PhiHyd when staggered-timeStep)
787      This will allow to put dissipation out-off the AB time-stepping.
788     Unfortunately, affects truncation error. Update output of exp. that "fails"
789      (cg2d matching number) and leave the others for later: front_relax(10),
790      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
791      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
792    
793    checkpoint57o_post
794    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
795      (2) its ready to be documented during the 20050801 DocFest
796    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
797      for ideal_2D_oce and lab_sea on linux_ia32_g77
798    o set to #undef CTRL_SET_OLD_MAXCVARS_30
799      in global1x1_tot/code_seaice_adj to access indices 32, 33
800      (worth another tag)
801    
802    checkpoint57n_post
803    o adding precip control xx_precip 32
804    o adding swflux control xx_swflux 33
805    o Replacing 10 forcing penalty cost routines by 1 generic.
806    o Implementing partitioning in time-mean and variable adjustment
807      for atmos. state.
808    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
809    o in natl_box_adjoint:
810      * updated exp 1 to 10
811        (but does not have time-mean vs. variable split results yet)
812    o updated global1x1/*_seaice_adj/
813      to incorporate latest changes
814    o enable useSingleCpuIO for mdsio vector routines
815      (applies in particular to tapelev I/O)
816    o removed inefficient K-loop in all active_file*control*.F
817    
818    checkpoint57m_post
819    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
820      and advect_cs (use EXCH-2 and standard cs-32 grid files).
821    o pkg/exch2: filling of face-corner halo regions is optional
822      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
823    
824    checkpoint57l_post
825     tag before updating tutorials (pre-release-2)
826    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
827       for output and interpolation of input fields onto model grid)
828    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
829       Affects results of exp. rotating_tank ; update output.txt.
830    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
831          and taking the square quantity and/or using a fraction-weight field.
832    o fix aim_diagnostics_init.F mate numbers.
833    o add mnc output capability to diagnostics/diagstat and update
834      our cvsignore files for the ACSII output generated
835    
836    checkpoint57k_post
837    o lab_sea now uses diagnostics package and provides a suite of
838      new EXF diagnostics output.
839    
840    checkpoint57j_post
841    o exf
842      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
843        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
844        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
845      * extended diagnostics output
846        - now includes all EXF variables
847        - hs, hl moved to common block
848        - separate S/R for diagnostics, called after ctrl vector is added
849        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
850        - EXFqnet contains true Qnet (i.e. includes qsw)
851      * updated verif. lab_sea, global_with_exf
852      * Rearranging hflux (exf_mapfields -> exf_getforcing)
853        to ensure that diagnostics sees a true EXFqnet
854    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
855    o diagnostics pkg: change pointers so that 1 diagnostic can be used
856      several times with different frequencies.
857    o mnc-ify the thsice package as requested by Daniel Enderton
858      - the monitor--MNC output needs work
859      - many attributes need to be added (most are currently blank)
860    o mnc-ify theaim_v23 package as requested by Daniel Enderton
861      - many attributes need to be added (most are currently blank)
862    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
863    o add Sadourny like discretization to the 4th.O vorticity advection scheme
864    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
865      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
866         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
867    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
868     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
869    
870    checkpoint57i_post
871    o Diagnostics package was changed: diagnostic allocation is now deactivated
872      by setting an empty file name in the namelist (used to be by setting 0 frequency)
873    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
874      add 1rst Order upwind vertical Shear.
875    o add a quick fix for A/B checkpointing in OFFLINE mode
876    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
877      end-run around the C/Fortran linking horror in eesup/src/timers.F
878    o added pkg/runclock: allows user to terminate run based on wall clock
879    o added non-hydrostatic scaling parameter: nh_am2
880    o pkg/my82: futile attempt to make results compiler-independent by adding
881      some "_d 0", etc. no effect.
882    o for mnc output, fill the 'T' coordinate var with myTime and create a
883      separate 'iter' variable for iteration count
884    o pkg/diagnostics:
885      add new capability: output of Global/Regional & per-level statistics ;
886      tested against monitor output (including land & thSIce) on various exp.
887    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
888    
889    checkpoint57h_done
890      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
891      data.diagnostics, data.gchem, data.ptracers) is done.
892    
893    o pkg/diagnostics: prepare for Global/Regional statistics.
894      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
895    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
896      and rename it: DIFFERENT_MULTIPLE
897    
898    checkpoint57h_post
899    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
900    o pkg/diagnostics: change output frequency, now in seconds (instead
901      of Nb of iterations). This requires to change data.diagnostics.
902    checkpoint57h_pre
903    
904    o in mnc, let the user create the output dir if both mnc_outdir_date
905      and mnc_outdir_num are false
906    o add fflags() to pkg/diagnostics which allows one to specify, on a
907      per-file basis, the file precision [default behavior is unchanged]
908    o added diagnostics to pkg/kpp, including computation of mixed layer
909      depth based on a temperature/density criterion
910    o updated verification/natl_box to test the new pkg/kpp diagnostics
911    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
912    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
913    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
914      not mnc -- this mistake was found by JMC and is now corrected
915    
916    checkpoint57g_post
917    o add Adams-Bashforth 3rd Order time stepping:
918      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
919      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
920    checkpoint57g_pre
921    
922    o make lambda[Theta,Salt]ClimRelax spatially varying
923      (default remains spatially uniform constant based on tau)
924    o added new control variables
925      * init. uVel, vVel, etanN
926      * lambda[Theta,Salt]ClimRelax
927    o separate masks used for ctrl_pack/unpack 'from write_grid' output
928      (suggested by G. Forget)
929    
930    checkpoint57f_post
931    o add parameter "baseTime" = model base time = time at iteration zero
932      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
933      account for baseTime shift
934    o move Coriolis arrays from PARAMS.h to GRID.h
935    checkpoint57f_pre
936    
937    o mnc-ifying the seaice package
938    o introduced an alternative length scale calculation for use in the limiting
939      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
940    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
941    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
942      as well as grad(vort3).  Made it compatible with both approximate form
943      for the cubed sphere and full form of these gradients.  Added flag
944      useFullLeith to select between approximate and full form.  
945    o add "d0" in getcon.F to reduce differences between compilers/platforms
946      update output.txt of exp. fizhi-gridalt-hs
947    o change port_rand funtion to allow to set the seed.
948    o fix obscure MNC bug involving conversion between reals and integers
949      - it caused no problems with certain (eg. gcc, ifc) compilers but the
950        new version is now more standards-compliant
951    o adjoint-related modifications
952      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
953      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
954      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
955    
956    checkpoint57e_post
957    o Adding eddy stress controls a la Ferreira et al.
958    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
959    
960    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
961      update output.txt of exp. fizhi-gridalt-hs
962    o add more "Z" dimensions and associated coordinate vars to MNC
963    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
964    o parameter calendarDumps: when set, approximate months (30-31 days) and years
965      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
966      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
967      months and years.  Requires pkg/cal.
968    o diagnostics: add pickup functionality
969      - off by default for backwards compatibility
970      - current version only uses MDSIO -- MNC will be added
971    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
972    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
973    
974    checkpoint57d_post
975    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
976    o modify verification/ideal_2D_oce so that it tests the creation of mnc
977      output from the diagnostics package
978    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
979    o make genmake2 more portable by using ".$FS" instead of ".f" for more
980      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
981    o add coordinate variables to the MNC output from the diagnostics package
982    o change MNC-flags default value: true when useMNC=TRUE
983    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
984      the ability (off by default) to read the grid information using MNC
985    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
986    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
987    o do snap-shot diagnostics at the middle of the time-interval (instead of
988      at the end).
989    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
990      new test for AIM with thSIce + slab-ocean
991    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
992    o move state variable diagnostics to the beginning of the time step ;
993      (note: still needs some work specially for snap-shot diagnostics)
994      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
995    
996    checkpoint57c_post
997    o Change testing option (-ieee) to get closer agreement between g77 & ifort
998    o generate new output.txt files on faulks with g77 & the new -ieee option
999    checkpoint57c_pre
1000    
1001    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1002      update output.txt of exp. global_ocean.90x40x15
1003    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1004      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1005    o add saltFlux(+File) forcing capability with periodicExternalForcing
1006    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1007    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1008    o improvements for the MNC output from DIAGNOSTICS:
1009      - correct handling of the unlimitied dimension
1010      - all dims now have associated coordinate variables
1011      - variables located at U, V, and Corner ("Z") points are now written
1012        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1013        *all* data points are output
1014    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1015    o added pkg/seaice/seaice_monitor.F
1016    o mdsio_readfield.F can now read files visible only to master MPI process.
1017    o pkg/seaice: some test code for ice-modified ocean stress
1018    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1019      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1020      spurious negative numbers for precipitation and humidity.  Will cause
1021      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1022    o pkg/ctrl/
1023      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1024        May be enabled via doPackDiag
1025      *  introduce z-scaling of
1026         + gradient (doZscalePack) and
1027         + control (doZscaleUnpack)
1028    o pkg/mdsio/
1029      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1030      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1031    
1032    checkpoint57b_post
1033    o simplify options in diagnostics_fill arguments (remove weird combinations)
1034    o fix MNC coordinate variables so that they now contain per-face index
1035      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1036      general, EXCH2 grids are only aligned to a "local" coordinate system
1037    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1038    o Implement instantaneous output within pkg diagnostics:
1039      setting a negative frequency in data.diagnostics produces
1040     "snap-shot" output (as opposed to time-average if freq > 0)
1041    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1042      NOTE: change ptracer diagnostics name: use 2 characters to work with
1043            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1044    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1045      becomes the coordinate variable for the 'T' dimension
1046    o add CF-style coordinate variables to MNC
1047      - just a first cut:  numbers are meaningless on the cubesphere and
1048        missing along the T axis but otherwise it works!
1049    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1050    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1051    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1052      this is based directly on what the model compute, so that the content of
1053      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1054    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1055    o clean up build options files for SunOS, in particular
1056      - remove -traditional from xmakedepend
1057      - change -xarch=v9 to -xarch=native for f77
1058      - restore use of make (not gmake)
1059      - add CC=gcc if using g77
1060    o changes per discussion of AM, JMC, & EH3 today:
1061      - move redundant "grid" variables out of "state" -- in preparation of
1062        creating proper CF-style coordinate variables and in recognition
1063        that any/all grid variables can be easily copied (eg. w/NCO) from
1064        the grid files into any of the other NetCDF files
1065      - *always* output grid variables with MDSIO (this will eventually be
1066        changed)
1067      - output MNC grid file if useMNC is true
1068    o every instance of _END_MASTER() has been found and replaced with
1069      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1070      preprocessors
1071    o re-arrange diagnostics pkg initialisation:
1072     - allow each package to extend the available diagnostics list
1073     - add some checking and fix small problems (multi-threaded, ...)
1074     - new S/R diagnostics_fill (replace fill_diagnostics):
1075       look through the short list of active diag. (instead of the long list)
1076       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1077    
1078    checkpoint57a_post
1079    o this set of changes restores TAMC compatibility
1080      tested for global_ocean.90x40x15 adjoint on trough
1081      (what a pain)
1082    
1083    checkpoint57a_pre
1084    o some modifs in tools/build_options for sunos
1085    o call ctrl_pack for ctrl at end for optimcycle=0
1086    
1087    checkpoint57
1088    o add horizontal bi-harmonic viscosity for vertical velocity
1089      - new parameter viscA4W (defaults to viscA4)
1090      - affects only non-hydrostatic code
1091      - to be done: no-slip lateral boundary conditions
1092    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1093    o implement Implicit Vertical advection for pTracers
1094    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1095      (implemented also for implicit vertical diffusion & advection)
1096    o OBCS: extend application of tracer open boundary conditions
1097      to a strip beyond the boundary of width Olx/Oly
1098    o add call monitor to TAF set of required calls (flow directives)
1099      and include in natl_box_adjoint
1100    o untangle a few ifdefs related to cost, ctrl, autodiff
1101      untangel a few ALLOW_ECCO_OPTIMIZATION
1102    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1103      (theta2, salt2 in ecco_cost_weights)
1104    
1105    checkpoint56c_post
1106    o OBCS as control variables
1107      - update ctrl_ad_diff.list, obcs_ad_diff.list
1108      - remove balance of obcs controls from default
1109      - fix index bug nobcs in ctrl_init
1110      - fix dummy fields filen in ctrl_pack
1111      - add dummy weights for obcs
1112    o lsopt: comment out fort.94 output
1113    o optim:
1114      - remove unnecessary header files
1115      - adjusted namelists
1116      - add xerbla.F to Makefile
1117    o exf:
1118      - multiple modifications of exf_check_range
1119      - unit change in exf_init_runoff from [m/year] to [m/s]
1120    o mdsio:
1121      - i/o-vector change debugLevel from debLevA to debLevB
1122    
1123    checkpoint56b_post
1124    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1125      is called from DO_THE_MODEL_IO
1126      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1127      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1128      - clean up PTRACERS_WRITE_TIMEAVE a little
1129    o add another verification experiment that tests both the cfc-pkg and
1130      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1131      reactive tendencies treated inline with regular timestepping
1132    o testreport previously did a lousy job of comparing small numbers, so
1133      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1134      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1135      testreport.
1136    o ptracers_monitor: bug fix for MPI
1137    
1138    checkpoint56a_post
1139    o GCHEM: finish reorganizating the package
1140      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1141        (introduces another 3D-array for each passive tracer, but only if
1142        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1143        gchemTendency is not needed because the timestep is done separately)
1144      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1145      - GCHEM is now---more or less cleanly---separate from PTRACERS
1146      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1147        so clear to me how that should be done in a general way.
1148    o CFC: improve formatting of output in CFC_ATMOS
1149    o PTRACERS:
1150      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1151        that ALL experiments with ptracers enable can be checked. This makes
1152        GCHEM_MONITOR obsolete.
1153      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1154        monitorFreq
1155      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1156    o add PTRACERS (PTR0[1-5]) to testreport output
1157    o exf_check_range:
1158      * default changed to .TRUE.
1159      * will check values for niter0 if debLevA, every timestep if debLevB
1160      * STOP in exf_check_range if 'out of range'
1161      * range chosen generous to allow for potential extema
1162      TBD: a version with stricter range
1163           permitted range would be runtime parameters
1164    o GMredi:
1165      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1166      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1167      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1168    o GCHEM:
1169      - move call to GCHEM_FORCING_SEP, so that it is now called before
1170        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1171      - introduced a useGCHEM runtime flag and applied it everywhere.
1172      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1173        this flag is now only visible within GCHEM-pkg routines.
1174      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1175        be replaced by a 3D array that is computed before thermodynamics; for
1176        this, the tracer ID iTracer had to be included into the parameter list
1177        of ptracers_forcing
1178      - set up forward_step to call gchem_forcing, that will replace
1179        gchem_forcing_int in ptracers_forcing
1180      - cleaning up
1181    o small cleaning of exch2: remove files that are also in eesupp/src
1182    
1183    checkpoint56
1184    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1185    o mnc: cleanup "full" files--fixes out-of-memory problem
1186    o ECCO-GODAE
1187      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1188      * fully merged and updated from SIO code
1189        windstress sign change affects
1190        - exf_inscal_[u/v]stress
1191        - sign of xx_tau[u/v] adjustments
1192        - signs in cost_scat
1193      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1194      * natl_box_adjoint updated and compressed
1195      * 2-level checkpoint switch added
1196        (tested in EXP. 1 of natl_box_adjoint)
1197      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1198    o SVD
1199      * first complete, non-hacked version for SVD calculations
1200      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1201        performed via direct access files admtlm_vector.it????
1202        (via ctrl_[un]pack)
1203      * optimcycle is used for ARPACK iteration counter
1204        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1205      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1206        and add linear transforms where necessary
1207      * controls are initial/final SST, SSS (can be extended; need to check
1208        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1209    o mdsio: filename info to both stderr, stdout
1210    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1211      from sign change
1212    
1213    checkpoint55j_post
1214    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1215      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1216    o add consistent build directories and .cvsignore files to verification
1217    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1218    o make all subroutines 30 or less characters in length for certain older
1219      compilers to work (a thorough search only turns up two routines in
1220      pkg/ptracers)
1221    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1222      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1223    
1224    checkpoint55i_post
1225    o change arrays for total vertical diffusivity (2.D if explicit,
1226      3.D if implicit) ; each ptracer uses its own background value.
1227    o added mnc/NetCDF output capability to ocn_compon_interf
1228      - added bits to verification/cpl_aim+ocn so that it can run on
1229        ITRDA and other clusters without the mpirun "-wd" option
1230    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1231      configuration
1232    o give MNC the ability to create additional files rather than
1233      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1234      - the default is just less than 2GB which is a practical limit
1235        on many systems
1236    o Compute the non-local term using either KPP vertical diffusivity (=default)
1237       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1238    
1239    checkpoint55h_post
1240    o add verification test "vermix"
1241    o remove all the *_ioinc flags and replace with the single global
1242      outputTypesInclusive flag
1243    o allow to set a vertical profile of vertical diffusivity for T & S
1244    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1245    o useMNC moved from data.mnc to data.pkg
1246    
1247    checkpoint55g_post
1248    o Renaming carbon AD experiments to comply with testreport conventions
1249    o Updating adjoint of Held-Suarez hs94.1x64x5
1250    o Fixing directives for non-ECCO forward_step, after ECCO directives
1251      have been fixed to avoid recomp. of do_oceanic_phys
1252      Works well for global_ocean.90x40x15,
1253      but recomp. issue remains for carbon
1254    o Updating adjoint output for natl_box_adjoint after
1255      pkg/ecco has been modified (see taga c55d_post)
1256    
1257    checkpoint55f_post
1258    o rename to timeave_init_fixed
1259    
1260    checkpoint55e_post
1261    o some delicate re-shuffle of store directives to avoid one
1262      extra call of do_oceanic_physics
1263      affects ecco_the_main_loop.F, do_oceanic_physics.F
1264      checkpoint_lev1_directives.h
1265    o NB: this may break global_ocean adjoint temporarily,
1266      but it is clear how to fix it. Will do later, need this now.
1267    
1268    checkpoint55d_post
1269    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1270    o ecco_cost_weights is modified to 1x1 runs
1271    o modifs to allow observations to be read in as
1272      single file or yearly files
1273    o enable to read exf forcing fields as either
1274      single file or yearly files (flag useExfYearlyFields)
1275    checkpoint55d_pre
1276    
1277    o switch between 2-level and 3-level checkpointing
1278    o add ability of MNC to write local and "partial" (eg. 2D slices where
1279      the full 3D field is never actually stored) arrays to NetCDF files
1280      with the correct (that is, the complete multi-dimensional) set of
1281      array indicies
1282      - used in mom_vecinv() to write the diagFreq output
1283      - tested (demonstrated) in verification/aim.5l_cs
1284    o further mnc-ification
1285      - add verification/lab_sea to the list with mnc setups
1286      - fix undefined mnc v-names in cd_code
1287      - add kpp to mnc output (both snapshot and timeave)
1288    o non-hydrostatic code
1289      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1290        in calc_gw.F
1291      - defaults to viscAh
1292      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1293        friction or Leith) in non-hydrostatic mode, as long as there is
1294        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1295    o pkg/cost
1296      extend simple cost functions to treat time mean quantities
1297      (T,U,V) via cost_accumulate_state from cost_tile
1298    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1299        be 2 times larger than the minimum size the advection scheme requires.
1300        now get a perfect conservation of salt in advect_cs test-exp (updated)
1301    o GGL90 (Gaspar's TKE mixed layer)
1302      - add horizontal diffusion of TKE, requires exchanges in
1303        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1304        default. In OPA there is no horizontal diffusion of TKE but the
1305        mixing coefficients are computed from a horizontal average of TKE of
1306        6 points or so. I think that diffusion has a little more physical
1307        justification.
1308      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1309        was in vain)
1310      - mask tke-variable in ggl90_init
1311    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1312    o fix biharmonic diffusion on CS-grid.
1313    o more obcs stuff
1314      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1315        for reading boundary values. This routine is called from
1316        obcs_prescribe_read
1317      - updated obcs_check
1318      - changed sponge layer relaxation parameter units for days to seconds
1319      - turned off sponge layer by default
1320      - changed argument list of OBCS_CALC to myTime+deltaTclock
1321      - fixed about 35 bugs in obcs_external_fields_load
1322    
1323    checkpoint55c_post
1324    o obcs stuff
1325      - new runtime flags useOBCSprescribe, useOBCSbalance
1326      - re-arranged obcs_calc
1327      - moved exf_getobcs to obcs_prescibe_read
1328        obcs_prescibe_read is called after ORLANSKI stuff
1329        and independent of it (executable can contain all).
1330      - updated obcs_check
1331      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1332        These may be necessary only if tangential velocities are
1333        prescribed at OB, not sure, needs testing.
1334    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1335      which simplifies the calls and passes the ifc check-bounds test
1336    
1337    checkpoint55b_post
1338    o add a 2D scalar, Z location, exchange_2 routine.
1339    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1340      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1341      affects advect_cs results (for the wrong reason): update output.txt
1342    o use a more standard discretization for biharmonic viscosity ;
1343     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1344      affects results of dome set-up: update output.txt
1345    o fix gad_advection.F (CubedSphere part), back to version 1.23
1346    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1347    
1348    checkpoint55a_post
1349    o merged code to
1350      * prescribe/read time-dependent open boundaries
1351        (works in conjunction with exf, cal)
1352      * sponge layer code for open boundaries
1353      * each boundary N/S/E/W now has its own CPP option
1354        (healthy for the adjoint)
1355    
1356    checkpoint55
1357    o up-to-date adjoint of previous breaks
1358      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1359      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1360      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1361      - carbon: * remove tr1-related adjoint verification
1362                * add ptracer as control variable
1363    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1364      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1365    
1366    checkpoint54f_post
1367    o in verification/carbin/ remove experiment related to
1368      ALLOW_PASSIVE_TRACER (array tr1 etc)
1369      code_ad/ input_ad/ results_ad
1370    
1371    o add two new packages
1372      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1373        + subject to optimization (memory)
1374      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1375        + subject to reordering (many GOTOs in the original code)
1376        + so far opps is called for every (i,j) point, and then operates in
1377          the vertical; one may want to reorder the scheme in order operate in
1378          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1379          fields)
1380    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1381      - all verification tests compile and run with linux_ia32_g77
1382      - defaults are compatible with current input files--nothing
1383        should change if you were not previously using MNC
1384      - MNC output has been added in numerous places (eg. timeave)
1385        but there are still a few writes not yet do-able with MNC
1386        (this is in progress)
1387      - flags now allow for either/or/both use of MDSIO and MNC and
1388        documentation will soon follow
1389      - numerous small formatting cleanups for ProTeX
1390    o add version info (via BUILD_INFO.h) to MNC and stdout
1391    
1392    checkpoint54e_post
1393    o add two new packages
1394      - pp81 (Packanowski and Philander, 1981), Richardson number and
1395        stratification dependent mixing
1396      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1397      - these scheme operate in a similar manner as KPP (without ghat, of
1398        course), however there is only one diffusivity that is used for both
1399        temperature and salinity (and passive tracers)ç
1400    o add offline package
1401    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1402      provided by Stephanie Dutkiewicz
1403    o genmake2: add ability to search for C compilers and cleanup test output
1404      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1405    
1406    checkpoint54d_post
1407    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1408    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1409      leading to additional shift by 5 days each year of integration
1410       (i.e. leading to considerable offset over the years)
1411    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1412    o start with no AB and no initial filtering (staggerTimeStep):
1413      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1414    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1415      (external loading & cpl import/export stay in forward_step.F)
1416    o update coupling interface to work with new staggerTimeStep
1417    o change MDSIO ptracers_pickup.
1418    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1419    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1420    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1421    
1422    checkpoint54c_post
1423    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1424      this affects (truncation error) output.txt of test-exp:
1425       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1426    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1427    o change Qnet to always be the net heat flux, (+upward).
1428      affects (truncation error) output of natl_box exp.: updated
1429    o define the max number of passive tracers in PTRACERS_SIZE.h
1430    o start to test mnc routinely in exp0
1431    o add sea-ice loading (sIceLoad) as a new forcing field.
1432    
1433    checkpoint54b_post
1434    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1435       impressive on Altix and Opteron systems)
1436    o diagnostics can now write NetCDF files through the mnc package
1437    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1438    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1439    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1440      affects (truncation error) output of lab_sea & natl_box exp.: updated
1441    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1442    
1443    checkpoint54a_post
1444    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1445    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1446    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1447    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1448      + internal_wave (shift in writing cg2d_ini_res)
1449    checkpoint54a_pre
1450    
1451    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1452      - modified verification/lab_sea and natl_box_adjoint accordingly
1453    
1454    checkpoint54
1455    checkpoint53g_post
1456    o prepare splitting of thermodynamics: store convect.counter in common block
1457    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1458      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1459    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1460    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1461    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1462    o restore adjointability
1463    
1464    checkpoint53f_post
1465    o modifications that affect AIM experiment results (update output.txt):
1466      - no advection of S at top interface Nr (pkg/generic_advdiff)
1467      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1468    o AIM pkg:
1469      - include stability function into surf.Flux derivative relative to Tsurf
1470      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1471    
1472    checkpoint53e_post
1473    o merged cylindrical coord configuration
1474    o added rotating_tank experiment
1475    checkpoint53e_pre
1476    
1477    checkpoint53d_post
1478    o faulks upgraded: re-generate output.txt that have changed:
1479       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1480    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1481    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1482    o added Sadourny discretization of Coriolis
1483      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1484      - re-enabled use of omega3 (useAbsVorticity)
1485    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1486      vector-invariant equations
1487      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1488    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1489      hopefully without new bugs
1490      - still to do: biharmonic friction for non-hydrostatic w
1491    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1492    o regenerated output for global_ocean_ebm (using -ieee)
1493    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1494      of mom_common/
1495      - simple re-arrangement of instructions within computing loop
1496    checkpoint53d_pre
1497    
1498    checkpoint53c_post
1499    o new version of coupler for AIM+thSIce and Ocean models
1500     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1501     - land: change Evaporation of snow
1502     - aim with thSIce: fix bug in snow-precip.
1503    o changes to calc_gw.F
1504     - bug fix for w^2 term near the bottom boundary
1505     - (hopefully) improve the lateral slip boundary condtions for use with
1506        partial/looped cells
1507      - because the bug fix changes two verification experiments anyway (exp5
1508        and plume on slope), change the lateral boundary condition from half slip
1509        to the value of no_slip_sides
1510    o ebm package wasnt quite up to the parallel task. Fixed that.
1511    o Adjoint of EBM package + verification
1512      * TLM OK
1513      * ADM not sufficient accuracy yet (needs further testing)
1514    
1515    checkpoint53b_post
1516    o Commiting new energy balance model to repository
1517      * package is pkg/ebm
1518      * verif. is verification/global_ocean_ebm
1519      * references are in ebm_driver.F
1520    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1521    C        Global thermohaline circulation. Part I:
1522    C        Sensitivity to atmospheric moisture transport.
1523    C        J. Climate 12(1), 71-82
1524    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1525    C        Global thermohaline circulation. Part II:
1526    C        Sensitivity with interactive transport.
1527    C        J. Climate 12(1), 83-91
1528    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1529    C        Destabilization of the thermohaline circulation
1530    C        by atmospheric eddy transports.
1531    C        J. Climate 7(12), 1870-1882
1532    o Will need long integration testing.
1533    checkpoint53b_pre
1534    
1535    o created pkg/mom_common in preparation for variable viscosity code
1536    o renamed and split ini_mnc_io
1537    o pkg/land: only liquid water can diffuse or run-off
1538    o AIM using land: soil wetness availability account for snow
1539    o added printMapIncludesZeros to EEPARMS namelist
1540    
1541    checkpoint53a_post
1542    o restore TAMC compatiility for exf_constants.h
1543      (no usage of _d in .h)
1544    o Additional storing in KPP in an attempt to fix
1545      TAMC problem with adjoint of KPP code.
1546      (no success...)
1547      Identical code works fine with TAF.
1548    o Fixed verification/natl_box_adjoint experiments.
1549      Initial conditions for Experiments 4 and 5 are now
1550      set to "SEAICE_initialHEFF=0", which is more reasonable,
1551      and hence gives results closer to that of Experiment 2.
1552      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1553    
1554    checkpoint53
1555    o stable checkpoint with up to date adjoint
1556      TLM tests only run for 1st grdchk at the moment. Its unclear if
1557      this is a code problem or a problem with resetting code for g_
1558      variables that is being autogenerated wrong.
1559      Otherwise:
1560       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1561       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1562         are both still in chaos following their security messes.
1563    
1564    checkpoint52n_post
1565    o various build (mostly genmake2) changes including:
1566      - ability to build/run more easily within Cygwin and MacOS X
1567      - more complicated Makefiles with a stronger dependence on Gnu Make
1568    o pkg/seaice modifications
1569      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1570        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1571        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1572      - changed proxy for geostrophic velocity and updated
1573        verification/lab_sea/results/* accordingly
1574      - removed ADI dynamic solver from pkg/seaice
1575      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1576        they caused a segmentation fault under certain circumstances
1577      - removed unused field WATR
1578    o bug fix in exf-package:
1579      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1580         now reflect that.
1581    o small fixes in the cal-package:
1582      - set reference date to first of January for the 'model'-calendar
1583      - failing of cal_CheckDate in cal_FullDate now actually results in a
1584        warning
1585    o small modifications in exf-package to increase flexibility:
1586      - change climtempfreeze from a constant to a runtime parameter that
1587        is specified in data.exf_clim (default = -1.9)
1588      - introduce runtime parameter windstressmax (default = 2.0) that is
1589        specified in data.exf
1590    o fix in pkg/thsice:
1591      - update Evap (Tsf changes) to be consistent with Latent heat flux
1592      - maintain snow precipitation unchanged (even if Tsf >=0).
1593     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1594    
1595    checkpoint52m_post
1596    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1597      this does not change any of the results, because myIter=0 in swfrac always
1598      lead to jwtype=2 (the default anyway), but the call makes little sense
1599      as a default
1600    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1601    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1602      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1603    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1604    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1605    o extending useSingleCpuIO option to work with new exch2 I/O format
1606      - old-style, missing-tile I/O is still accessible by defining CPP
1607        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1608    o monitor package can write to NetCDF files and/or STDOUT
1609    o fix re-definition bug in MNC_GRID_INIT_ALL()
1610    o doc/api_reference added
1611      - a framework for building an API Reference Manual using all
1612        the "protex" comments embedded in the code
1613      - see pkg/generic_advdiff, pkg/mnc for examples
1614    o MNC:
1615      - make myThid the last argument for all subroutines
1616      - new default for the grid files: NO halos
1617      - add useMNC and other run-time flags
1618      - separate per-file-group handling of the unlimited dimension
1619      - early initialization of MNC w/ flags read at the eeboot stage
1620        and lookup tables set in initialize_fixed
1621      - write all MNC output to a freshly-created directory
1622    o thermodynamics sea-ice (thsice) is now tested with testreport.
1623    o test exp. advect_cs: use the standard cs32 grid ; update output.
1624    o Added functionality to grdchk:
1625      pick global i,j,k position (or nearest wet) where to perform check.
1626    
1627    checkpoint52l_post
1628    o new land formulation:
1629      a) use ground enthalpy as prognostic variable to ensure exact
1630         energy conservation.
1631      b) account for water temperature and for latent heat of freezing
1632         in all processes (rain, run-off, ground storage)
1633      c) compute surface and ground temperature implicitly.
1634    o aim_v23 modification for new land model:
1635      a) Treat separately land / ocean / sea-ice surface fluxes
1636         to allow implicit computation of land & sea-ice surface temp.
1637      b) add snow precipitation.
1638    checkpoint52l_pre
1639    
1640    o fix problem (when 1 tile is empty) in min/max monitor.
1641    o fix bug in timeAve (u,vZetatave in common block)
1642    o no restoring terms under ice for pkg/seaice
1643    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1644    o bug fix for pkg/seaice pickups
1645    o change MNC call locations and add coordinate attributes
1646    o mask vorticity at the corner ; affects global_ocean.cs output
1647    o fix ini_curvilinear_grid ; test CS experiments with mpi
1648    o aim.5l_cs: modify sea-ice fraction input file ; update output
1649    o exf: Adding simple range check routine for exf fields after read
1650    
1651    checkpoint52k_post
1652    o removed top-level directory "diags"
1653      - we migrated these functions to pkg/timeave a long time ago
1654    o fixed bug introduced in pkg/monitor
1655    o accuracy ctrlprec = 32 insuffient for gradient checks using
1656      averaged fields (I/O via cost_averages)
1657      -> use ctrl.h in active_file*.F to control I/O precision.
1658    o paramter list of CALL ADTHE_MAIN_LOOP
1659    o added initial do_the_model_io to ecco
1660    o set all ...Freq to zero after cost_final
1661      taveFreq, dumpFreq, pChkptFreq
1662    o MAIN and ECCO differentiability restored
1663    
1664    checkpoint52j_post
1665    o fix nchklev in tamc.h for global_ocean...
1666    o Bringing flow and store directives up-to-date
1667    o Really weird thing!
1668      call do_the_model_io from the_main_loop with parameters
1669      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1670      TAF places a faulty re-call of initialise_varia
1671      after cost_final call which should not be there!
1672    checkpoint52j_pre
1673    
1674    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1675      error messages
1676    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1677    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1678      debug output
1679    o modfied mdsio_writefield.F to handle non-global files under exch2
1680    o update AIM Cubed-Sphere exp (aim.5l_cs):
1681      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1682    o update AIM Equatorial Channel exp:
1683      use standard aim_v23 pkg and change the SST fields to be more realistic.
1684    o globalFile now works with exch2
1685    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1686      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1687    o limit timeave output for hi-res integrations
1688    
1689    checkpoint52i_post
1690    o removed CPP_EEOPTIONS.h from verification/*/code
1691    o updated the tiling for global_ocean_pressure
1692    checkpoint52i_pre
1693    
1694    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1695      the old pkg/aim).
1696    
1697    checkpoint52h_pre
1698    o shortened offending lines in exch2_send_rx?.template
1699    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1700    o genmake2: add build & execute test for NetCDF code
1701    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1702      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1703    o added useSingleCPUIO flag to monitor.F and mon_out.F
1704    o added temporary hack for sea-ice dynamics on the cube:
1705      metric terms are ignored and it is assumed that
1706      there is no sea-ice on cube faces 1, 2, 4, and 5.
1707    
1708    checkpoint52f_post
1709    o added exch2 cube routines to pkg/exch2
1710    o modified hs94.cs-32x32x5 to use it
1711    o added new grid files to hs94.cs-32x32x5
1712    checkpoint52f_pre
1713    
1714    checkpoint52e_post
1715    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1716      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1717    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1718      to work with implicit vertical advection and AB ;
1719    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1720    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1721     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1722    checkpoint52e_pre
1723    
1724    o fix bug in impldiff when Nr=1 or Nr=2.
1725    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1726    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1727    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1728      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1729    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1730    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1731    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1732    
1733    checkpoint52d_post
1734    o re-tiled many expts to allow comparison in multi-processor mode
1735      - updated output accordingly
1736      - changed hs94.128x64x5 to use intial T from file rather than use the
1737        random number generator
1738    o add infrastructure in model routines for fizhi and gridalt packages
1739    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1740    o changes to permit hi-res, cubed-sphere, configuration
1741      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1742      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1743      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1744        of surface winds for the cube
1745      (A verification experiment, based on global_ocean.cs32x15, but with
1746       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1747       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1748       complete with example surface forcing files and matlab scripts to look
1749       at the output and compare it with that of global_ocean.cs32x15.)
1750    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1751       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1752       to conform to the common rule.
1753    o check-in the first version of the coupler + interfaces for multi-components
1754       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1755       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1756       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1757       - ocean and atmos. share the same horizontal grid (no interpolation).
1758       - exchanges between component and coupler is done in forward_step
1759    o new verification experiment, cpl_aim+ocn:
1760       coupled ocean - AIM atmosphere on cs32 grid.
1761    
1762    checkpoint52d_pre
1763    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1764    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1765    
1766    checkpoint52c_post
1767    o Fixing OPTIONS files for use of exf:
1768      - ALLOW_ECCO not needed
1769      - ECCO_CPPOPTIONS.h should not be included from
1770        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1771        as has been the case in the past
1772      - All cal/exf related options are currently set in
1773        single header file. Should remain so until we
1774        agree on a consistent new policy.
1775    o Removed all CPP options for cal package.
1776      cal has no more CPP options.
1777    o modified STOREs in GAD_ADVECTION
1778    o corrected key comp. for passkey
1779    
1780    checkpoint52b_post
1781    o new version: "thsice" of thermodynamic sea-ice pkg:
1782     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1783     - modify fluxes but do not change theta directly;
1784     - light cleaning of bulk_force pkg (still needed with thsice).
1785     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1786       + output_thsice.txt to test thsice & bulk_force pkgs.
1787    o put back grid & coriolis monitor output.
1788    checkpoint52b_pre
1789    
1790    o call "do_the_model_io" at the beginning (=> dump initial state)
1791    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1792    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1793      (need info on NUMBER_OF_PTRACERS)
1794    o missing PTRACERS headers in some routines
1795    o default tamc.h in pkg/autodiff supposed to crash
1796      to ensure proper customization
1797    
1798    checkpoint52a_post
1799    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1800    - moved surfaceTendencyTice from pkg/seaice to main code    - moved surfaceTendencyTice from pkg/seaice to main code
1801    - FREEZE moved to FORWARD_STEP    - subroutine FREEZE_SURFACE now limits only surface temperature
1802    - subroutine FREEZE now limits only surface temperature      and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1803      this means new output.txt for global_ocean.90x40x15,      => new output.txt for global_ocean.cs32x15 & global_with_exf
1804      global_ocean.cs32x15, and global_with_exf, but note    - keep the old version of FREEZE for backward compatibility;
1805      that results for these three experiments remain      global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1806      bit-identical to before if allowFreezing=.FALSE.    - corresponding modifs for TAF directives
1807  o added surface flux output variables to TIMEAVE_STATVARS  o added surface flux output variables to TIMEAVE_STATVARS
1808  o time-averaged output for pkg/ptracers  o time-averaged output for pkg/ptracers
1809    o fix problem with ECCO-related divided adjoint
1810      snapshot file was missing some ad-variables,
1811      but no warning issued by TAF
1812    
1813  checkpoint52a_pre  checkpoint52a_pre
1814  o some bug fixes for #undef REAL4_IS_SLOW  o some bug fixes for #undef REAL4_IS_SLOW

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