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revision 1.32 by adcroft, Thu Nov 30 16:51:40 2000 UTC revision 1.718 by jmc, Wed Aug 23 15:26:17 2006 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 simplify EXCH interface:
8     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
9     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
10    o added the regrid package
11    o shelfice:
12     - add a simple boundary layer scheme to reduce noise
13     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
14    
15    checkpoint58n_post
16    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
17       local variable (not in common block).
18    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
19      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
20      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
21        to work with SingleCpuIO.
22    o add "_d 0" to real constant of pkg/cfc subroutines ;
23       update exp. cfc_exemple & tutorial_cfc_offline output files.
24    o multi-threading and IO:
25      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
26        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
27      - barrier before and after reading.
28      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
29      - avoid using MDS_WRITELOCAL for LAND pkg output.
30      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
31        common-block variables ; Allows multi-threading with master-thread IO.
32    o change default MAX_NO_THREADS from 32 to 4 ;
33      and stop cleanly when MAX_NO_THREADS is too small.
34    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
35    
36    checkpoint58m_post
37    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
38       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
39    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
40       keep global_ocean.90x40x15 (for AD testing) with former secondary test
41       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
42    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
43        add MITgcm_tutorials (= code + all the tutorials)
44    o ecco, option to compute cost for total ssh (mean+anom)
45    o consistent with addition of ptracer and ssh in pkg/profiles
46    o profiles: adding ptracer and ssh
47    o testreport: change multi-test output-file name
48      (from output.txt.{name} to output.{name}.txt)
49    o profiles: now ok for mutli-tiles case
50    o seaice: add 4 parameters for different advection schemes for area,
51      (effective) seaice thickness, enthalphy, and snow height. Their default
52      is the standard parameter SEAICEadvScheme
53    o calc_gw:
54     - add cosFacU in zonal viscous flux (harmonic.visc.).
55     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
56       of tutorial_plume_on_slope.
57    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
58    o calc_gw: true flux-form, account for horizontal grid spacing.
59      update rotating_tank results, but not plume_on_slope (affected at
60      truncation level, 11 digits).
61    
62    checkpoint58l_post
63    o calc_gw:
64     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
65     - remove side-drag for now (need to fix it); update plume_on_slope results.
66     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
67    o commit code to make SST/SSS weights spatially variable
68      (based on either variable in-situ or variable initial T/S weights)
69    o pkg/ecco:
70      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
71        now based on horizontally varying weights wthetaLev, wsaltLev
72      * cost_averagesflags now returns year indices in addition to day, month
73      * sflux balance is performed on annual basis
74        (sflxumm, sfluxmm2, bal_sfluxmm)
75      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
76        including separate counting and multipliers
77    o pkg/rbcs
78      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
79    
80    checkpoint58k_post
81    o testreport:
82     - always build in dir. "build" (if not there, mkdir build instead of building
83       & running in input)
84     - run in dir run (if it exists), in build otherwise.
85     - call prepare_run (if input/prepare_run exists)
86     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
87    o pkg/exf modifications to interpolation and rotation routines for more
88       reasonable treatment of North Pole singularity: for tracers North Pole
89       value is set to northernmost zonal-mean value, for zonal velocity it is
90       set to zero, and for meridional velocity it is set to northernmost value.
91    o pkg/exf/exf_check_range.F
92     - add tile index to diagnostics and move stop statement to the very
93       end of the routine.
94    o pkg/diagnostics: (diagnostics_main_init.F)
95      define title of isomorphic variables according to the current config.
96    o pkg/thsice with pkg/seaice dynamics:
97    - fix domain of computation (interior only, required for exf) and do exchanges
98    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
99    o towards a standard way of dealing with multi-threading in MONITOR
100      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
101    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
102       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
103    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
104    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
105    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
106       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
107    o tracer advection:
108     - clean-up and simplify calc_common_factors.F
109     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
110       advection subroutine (but still not used within DST advection S/R)
111    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
112    
113    checkpoint58j_post
114    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
115      from file (collects calls previously in FORWARD_STEP)
116    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
117    o adjoint store dir. adjusted accordingly
118    o genmake2
119      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
120    
121    checkpoint58i_post
122    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
123      on wind stress (SEAICEstressFactor defaults to 1.)
124    o Total number of Timers is finite (<=40): comment out 2 non-essential one
125      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
126    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
127      on CS-grid: no longer loosing mass.
128    o exf & curvilinear-grid: no longer modify longitude xC & xG.
129    o pkg/ggl90: fix sloppy output and fix a bug
130    o pkg/seaice: added SEAICEuseEVPpickup parameter
131      - Set to false in order to start EVP solver with
132        non-EVP pickup files when using SEAICEuseEVP
133      - fix sign error in diffusion in seaice_calc_rhs
134    
135    checkpoint58h_post
136    * Modifications for bottom topography control
137      o replace hFacC by _hFacC at various places
138      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
139      o add non-self-adjoint cg2d_nsa
140      o update autodiff support routines
141      o re-initialise hfac after ctrl_depth_ini
142      o works for 5x5 box, doesnt work for global_ocean.90x40x15
143    * Adding verification for 5x5 box (4-layer) bottom topography control
144    
145    checkpoint58g_post
146    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
147       used for mean seasonal cycle, mean diurnal cycle); add an example
148       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
149    o pkg/ggl90:
150      - add parameter (minimum surface kinetic energy)
151      - fix bug (avoiding division by zero)
152    o couple pkg/thsice to pkg/seaice:
153      - modify advection in seaice to accomodate new scalar fields to be advected
154      - only muliDimAdection scheme work with seaice/thsice
155      - mapping of thsice-variables to seaice-variables, back and forth
156      - does not break the verification experiments, but does not give the
157        desired results either
158    o pkg/seaice
159      - make (default) second order advection a bit less confusing?
160    
161    checkpoint58f_post
162    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
163      to pkg/seaice):
164      - new routines thsice_map_exf and thsice_get_exf provide the interface
165      - add an additional formal parameter to thsice_solve4temp
166    o pkg/exf:
167      - add new fields wspeed, snowprecip (to be able to couple to thsice)
168      - correct Stefan-Boltzmann constant
169      - new parameter for longwave surface emittance
170      - separate some stuff from exf_bulkformulae into new routines  
171        exf_radiation, exf_wind
172      - add new parameters and constants: longwave emissivity for ocean, ice
173        and snow, evaporation parameters over ice
174      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
175        either wind from stress or stress from wind
176    o pkg/thSIce:
177    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
178    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
179       and THSICE_CALC_THICKN
180    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
181    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
182      to make debugging easier.
183    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
184    o pkg/bulk_force:
185      - clean-up comments and parameters ;
186      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
187    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
188      generate new output for test-experiment: aim.5l_cs.thSI
189    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
190      testreport accordingly
191    
192    checkpoint58e_post
193    o SEAICE_CGRID adjoint done
194    o R_STAR adjoint implemented.
195      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
196      * need to sort out init. of h0facc, etc.
197    o Make pkg/profile fully independent of ecco,cost, etc. stuff
198      to be able to use it in pure forward.
199    
200    checkpoint58d_post
201    o upgrade simple test-experiment to tutorial example:
202     step.1: duplicate the experiment and (step.2) will remove the old copy.
203      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
204      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
205      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
206      tutorial_global_oce_biogeo    <- copy of dic_example
207      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
208      tutorial_plume_on_slope       <- copy of plume_on_slope
209      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
210      tutorial_global_oce_optim     <- empty for now (David ?)
211      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
212     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
213    o correct a sign problem in cost_scat.F
214    o obcs and ptracers: fix boundary conditions for advections schemes
215      with larger stencil
216    o thsice adjoint: start
217    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
218      completeness
219    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
220      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
221    o ptracers adjoint:
222      * avoid extensive recomputatations
223      * fix missing re-init. of gptr (missed by TAF)
224    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
225      me to turn off the excessive output to STDOUT that this package produces
226    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
227      and add those terms in Vector-Invariant formulation.
228    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
229      if the control period (xx_hfluxperiod etc) is 0
230    o in profiles pkg, clean routines and fix details
231    o in ecco pkg, reading ssh data:
232      fix problem in case the model does not start at iter0=0
233    o fix mnc-pickup/restart for ptracers
234    o new package prifiles:
235      code to compute profile-based cost by Gael Forget
236      (modifs in ecco, ctrl, autodiff)
237    o Benign bug fix in initialization (spotted by M. Mazloff) of
238      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
239    
240    checkpoint58c_post
241    o adjoint: finish NLFS adjoint and provide reference output in
242      verification/global_ocean.90x40x15/results_ad_nlfs
243    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
244      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
245      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
246      with SEAICE_CGRID defined.
247    o move calendarDumps from "data" to "data.cal" and clean-up the code
248      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
249    o add useEXF & useCAL flags (for now, set in hard-coded way)
250    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
251      (were missing in NH mode, and wrong in quasihydrostatic mode).
252      waiting for Chris updated version of calc_gw to add those CALLs.
253    o fix bug in quasihydrostatic S/R ;
254      add a test for this option: global_ocean.90x40x15.qshyd
255    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
256      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
257    o add on/off flag useOffLine for package OFFLINE
258    o seaice:
259      - modify advection so that it works also on the C-grid
260      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
261        problem in multi-tile runs with C-grid
262      - add flags for clipping ice velocities and/or masking solver forcing
263      - fix drag (ocean on ice) formulation and a bug that caused noise in the
264        C-grid solver
265      - added a few comments to seaice_diffusion.F
266      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
267        are now exclusive)
268      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
269        required re-ordering the code a little:
270       + make DAIRN global variable (defined in SEAICE)
271       + move computation of the viscosities eta and zeta into a new separate
272         routine (because I need to recompute them in seaice_ocean_stress.F)
273    
274    checkpoint58b_post
275    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
276      update output.txt of exp. aim.5l_cs.thSI
277    o various mnc cleanups and improvements:
278      + shrink lookup tables by factor of ~4
279      + better error reporting when running out of lookup space
280      + able to handle longer path/file names (up to 500 chars)
281    o adjoint:
282      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
283      - TBD: "hidden" mom_vecinv recomp. in dynamics
284    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
285     (allow to differentiate between forcing components using new integer flags:
286      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
287     and add new flag to put Dissipation tendency out of Adams-Bashforth.
288    o ecco
289      - enable trend removal from SSH anomaly obs.
290    o adjoint
291      - a fix for PmEpR when #undef EXACT_CONSERV
292      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
293      - try to fix "hidden" recomp. in forward_step for NLFS
294        (NLFS seems broken sometimes after I checked it in)
295    o seaice:
296     - add c-grid version of the dynamic solver:
297       + three new routines that are the c-grid substitute lsr, dynsolver
298         and ostres
299       + put a few fields that were local to dynsolver into global common
300         blocks, so that I can move the computation of stresses etc into
301         seaice_lsr (saves coding but may break the adjoint).
302     - replace more hardwired parameters by runtime parameters
303     - add ice masks that mask the rhs of the implicit solvers where there
304       is no ice (commented out in seaice_dynsolver, because i am not sure
305       if this works properly), eventually this should replace the clipping
306       of ice velocities in seaice_dynsolver to +/-40cm/s.
307    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
308      include it only where its needed
309    o move balancing of fluxes before the call of external_forcing_surf
310    o seaice:
311      - correct units of turning angles (now they are really in degrees)
312      - move computation of GWATX/Y out of main routine into dynsolver
313      - initialize GWATX/Y in seaice_init
314    o Apply mask on Fresh-Water flux (needed for SSH forcing).
315      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
316    o seaice: add runtime flags for turning angles (default to zero)
317    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
318      and trend from exf forcing and ctrl control adjustments
319    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
320      (since checkpoint57x_post)
321    o change the default rotation period to 86164.s = the Earth rotation
322    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
323      and based on a reference stratification. Tested within hs94.cs-32x32x5.
324    o seaice advection: add code for choosing between the default (2nd order
325      central differences) and multiDim advection schemes provided by
326      pkg/generic_advdiff
327    o seaice:
328      - removed all references to SEAICE_GRID.h fields from
329        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
330        (cubed-sphere configuration will change a little)
331      - grid computations in seaice_init are obsolete now.
332      - cleaned up code a little so that is easier to read (hopefully).
333      - added new (better?) discretizations of default advection and diffusion
334        (turn on with SEAICEuseFluxForm)
335      - replace 1 in 3d global fields by kSurface in growth.F
336      
337    checkpoint58a_post
338    o seaice:
339      - bug fix in advect.F
340    o shelfice:
341      - separate shelfice load anomaly from pload (breaks with time
342        dependent forcing), => introduce constant field shelficeLoadAnomaly.
343        Its default is 0., but it may be computed more cleverly from (unknown)
344        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
345        done offline. A good approximation of the pressure load anomaly is
346        necessary to avoid large initial adjustment processes underneath
347        deep-reaching shelfice.
348      - small fix in ISOMIP shelfice_thermodynamics
349      - add more sophisticated thermodynamics of Hellmer (1989), this is
350        now the default
351      - give a few constants more intuitive names
352    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
353      if bulk formulae are used in long integration (especially EmPmR). Turn
354      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
355      if balancePrintMean, the imbalance that is substracted is printed to
356      STDOUT.
357    o fix bug (typo) in obcs_apply_eta.F
358    o add a new package shelfice which enables us to model the circulation
359      underneath shelf-ice with draughts of hundreds of meters.
360     - works
361     - to do: + include improved thermodynamics
362              + check whether kSurfC (from model/inc/SURFACE.h) can be used
363                instead of new field kTopC
364              + can we use topoFile, Ro_surf and existing code in ini_depth.F
365                instead of new field R_shelfIce and new code in ini_depth.F
366                and ini_mask_etc.F?
367              + adjust vertical mixing schemes?
368    o seaice pkg:
369     - add a cpp-flag to include a simple formula for a salinity dependent
370       freezing point of sea water at the surface
371     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
372       meridional stresses are now different (and hopefully correct)
373    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
374       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
375       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
376    o pkg/diagnostics: add options and parameters for regional-statistics
377       diagnostics ; define regions by reading a region-mask from a file
378       (might add other options later)
379    o pkg/bulk_force:
380     - add option and parameters to use AIM surface-flux formulae.
381     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
382       others forcing fields (defined in PARM05, parameter file "data") are loaded
383       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
384     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
385     - use the right EXCH call for uwind,vwind (to work on CS-grid).
386     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
387       and parameters (note: calcWindStress replaces .NOT.readwindstress).
388     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
389    
390    checkpoint58
391    o add "--embed-source" option to genmake2 which, when the supporting
392      tools can be compiled (as determined by genmake2) will turn on the
393      embed_files package which then embeds the entire MITgcm source code
394      (*.[fFhc] + Makefile) used for the build within the executable
395      - requested by CNH but off by default
396      - adds a paltry <9MB to the mitgcmuv executable in most cases
397      - only writes the output when useEMBEDSRC in eedata is true
398    o clean up 3-dim. relaxation codes:
399      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
400      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
401      * Thanks to Tom Haine for testing!
402    
403    checkpoint57z_post
404    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
405      affects output (@ truncation level) of exp. plume_on_slope ; updated.
406    o fix the pickup behavior for obcs in combination with ptracers
407    o fix a bug in ptracers_external_fields_load
408    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
409      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
410    o transfered surface NH pressure to eta field (if exactConserv).
411    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
412         and update lab_sea output.txt file.
413    o completing 3-dim. relaxation code: additional term
414         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
415      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
416      * At compile time, in "EXF_OPTIONS.h" set
417          #define  ALLOW_CLIMTEMP_RELAXATION
418          #define  ALLOW_CLIMSALT_RELAXATION
419      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
420          tauThetaClimRelax3Dim = 15552000.0,
421          tauSaltClimRelax3Dim  = 15552000.0,
422      * 3 cases:
423          1) Use a constant-in-time 3-dim. field
424          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
425          3) Real-time relax. to time-evolving prescribed field
426    o Adding Laplacian-type smoothness constraint on
427      initial and boundary (forcing) controls (ic, bc)
428      * enable at compile-time via
429        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
430      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
431      * Absolute scale somewhat unclear so far
432      * no area weighting was included since no other cost term does so far
433    
434    checkpoint57y_post
435    First step for a NLFS adjoint
436    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
437    o new init. routines for calc_r_star, calc_surf_dr
438    o still need to deal with ini_masks_etc
439    o testreport seemed happy
440    checkpoint57y_pre
441    
442    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
443    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
444    o add new offset feature to offline pkg (plus minor cleanup)
445    o cfc fixes for final year of integration
446    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
447      be in GCHEM_OPTIONS).
448    
449    checkpoint57x_post
450    o fix testreport Pb in multiple test experiment.
451    o cleanup our namelist syntax in verification:
452      - make it more F95 standards compliant (some work still needed)
453      - allows the vast majority of our tests to work with gfortran
454    o Non-Hydrostatic:
455     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
456     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
457    o Allow to apply AB on T,S rather than on AB(gT,gS):
458     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
459     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
460       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
461     - need a "clever" read_pickup to restart from the other AB formulation
462    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
463    o remove some unused variables (reduces number of compiler warnings)
464    o adjoint
465      * Disable useVariableViscosity for adjoint for time being
466        (there are a number of extensive recomputations)
467      * Initialize certain variables needed for adjoint
468    
469    checkpoint57w_post
470    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
471                 fix the singleCpuIO RS version of MDSWRITEFIELD
472       and add a WARNING if using globalFiles=T with multi-processors.
473    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
474      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
475    o tracer advection scheme:
476      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
477       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
478       was not very convenient).
479      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
480       (further tests needed for the implicit DST & Flux-Limiter schemes).
481    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
482      and sRef for convenience, handy, when you want to initialize
483      ptracers in a large domain with a constant non-zero value. Also,
484      untangle ptracers_init.F a little.
485    
486    checkpoint57v_post
487    o change dome exp. to use variable viscosity in side-drag terms.
488    o remove all the files from the cfc_offline test since they are now
489      incorporated into tutorial_cfc_offline which has been producing
490      identical results for a few days of testing
491    o add new parameter: sideDragFactor to enable half-slip-side BC
492      and change side-drag S/R to use viscosity from mom_calc_visc
493      (can switch back by setting sideDragFactor=0.); affects results at
494      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
495       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
496    o vorticity & strain are now computed without masking, to account for
497      no-slip-side BC in variable viscosity calculation ; mask is applied
498      anyway later on, before computing advection/coriolis terms.
499    o modify exp4 to test new obcs support for reading from external files
500      and for passive tracers
501    o fix behavior of ptracers_monitor when monitor output is written to a
502      netcdf-file; still not independent of monitor.F (writes in the same
503      file).
504    o change default value of tRef (put a uniform, meaningful value for ocean
505      & atmos) and initialize sRef (was missing, as Martin mentioned).
506    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
507      to be proportional to enstrophy dissipation length.  Thus,
508       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
509      This is now consistent with Smagorinsky and with the manual.
510    
511    checkpoint57u_post
512    o OBCS and PTRACERS: add open boundary support for passive tracers
513      - either use homogenous (pseudo) v.Neumann conditions or prescribe
514        OB-values from file; this is not different from the way theta and salinity
515        are treated
516      - however, Orlanski-radiation conditions are not supported, and the model
517        will stop if you use pTracers and Orlanski at the same time.
518      - beefed up the rountine obcs_external_fields_load: now only those open
519        boundary values are overwritten with values from files for which there
520        are really files, otherwise the OB-fields remain untouched. This makes
521        it possible to use different OBs at different ends of the domain (as
522        with EXF)
523    o reduce number of exch calls in shap_filt (s2).
524    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
525      truncation level) 4/5 MLAdjust test results (11&12 digits match).
526    
527    checkpoint57t_post
528    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
529    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
530      same truncation, independent of the face number: affects affects several
531      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
532    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
533      note that biharmonic viscosity + no-slip was not tested in any experiment.
534    o fix bug in non-linear free-surf side-drag ; generate new output for
535      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
536    o make mnc honor the writeBinaryPrec flag for most kinds of output
537    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
538    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
539      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
540    o add brackets in multi-terms sum to get same truncation, independent of
541      the face number (manage to get exactly same value of gU,gV at the cs-edge)
542      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
543    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
544      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
545      a maximum grid-scale Reynolds number.  Also, changes all length calculations
546      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
547      Suggested values of viscosity parameters found in mom_calc_visc.
548      Many new viscosity diagnostics available.
549    
550    checkpoint57s_post
551    o Add clearing-house for viscosity calculations, mom_calc_visc and
552      correct numerous bugs in LeithD and Smagorinsky discretizations.  
553      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
554      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
555      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
556      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
557      The Strain-Tension form is now called with useStrainTensonVisc=.true.
558      ViscAhStrain and viscAhTension are now retired.
559    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
560    o In response to JMC's bug report, genmake2 now ignores any soft-links
561      that it finds in the *current* directory when searching for files.
562      Soft-links found in any other source directories will still work as
563      they did before.
564    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
565      a C routine to unlimit the stack size
566    o mnc-ify pkg/aim snapshot vars
567    o mnc-ify pkg/land as requested by Daniel
568    o various changes to mnc including:
569      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
570      - output can now be grouped so that all files within a group
571          change the ITER portion of their names in lock-step together
572      - can now read ("global") PER-FACE (in addition to PER-TILE) files
573          and works with both EXCH1 and EXCH2 (but needs more testing)
574      - writing works for all verification test cases w/ g77 on Linux
575    
576    checkpoint57r_post
577    o make MNC variable initialization happen earlier
578    o add diagnostics for (almost) each term of the momentum Eq.
579    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
580    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
581    o remove MINIMAL_TAVE_OUTPUT option ;
582      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
583    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
584      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
585    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
586    o add time-dependent SST, SSS control
587    o cost terms in ecco/ modularized (new cost_generic.F)
588    o cost_averages routines are modularized (new cost_averagesgeneric.F)
589    o new infrastructure for seaice model vs. obs misfits in seaice/
590      * driver from the_main_loop.F is seaice_cost_driver.F
591      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
592      * gradient check in Exp. 6a of natl_box_adjoint/
593    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
594      (see README file)
595    
596    checkpoint57q_post
597    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
598    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
599      - bug was reported by Jean-Michel and Ian Fenty
600    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
601      update exp. cpl_aim+ocn output.
602    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
603      Needed for high-res. runs with large global files
604      to be able to limit tapelev size
605    o Changed some tests for adjoint:
606      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
607      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
608      * global_ocean.90x40x15/ back to default 3-level checkpointing
609    o Modifications to enable scripted COMMON to MODULE conversion
610      * verification/OpenAD/code/ has necessary scripts and description;
611      * converts, compiles and runs successfully;
612    
613    checkpoint57p_post
614    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
615    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
616      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
617    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
618    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
619      (was already the case for dissipation with mom_vecinv,
620       and also the case for grad.PhiHyd when staggered-timeStep)
621      This will allow to put dissipation out-off the AB time-stepping.
622     Unfortunately, affects truncation error. Update output of exp. that "fails"
623      (cg2d matching number) and leave the others for later: front_relax(10),
624      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
625      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
626    
627    checkpoint57o_post
628    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
629      (2) its ready to be documented during the 20050801 DocFest
630    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
631      for ideal_2D_oce and lab_sea on linux_ia32_g77
632    o set to #undef CTRL_SET_OLD_MAXCVARS_30
633      in global1x1_tot/code_seaice_adj to access indices 32, 33
634      (worth another tag)
635    
636    checkpoint57n_post
637    o adding precip control xx_precip 32
638    o adding swflux control xx_swflux 33
639    o Replacing 10 forcing penalty cost routines by 1 generic.
640    o Implementing partitioning in time-mean and variable adjustment
641      for atmos. state.
642    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
643    o in natl_box_adjoint:
644      * updated exp 1 to 10
645        (but does not have time-mean vs. variable split results yet)
646    o updated global1x1/*_seaice_adj/
647      to incorporate latest changes
648    o enable useSingleCpuIO for mdsio vector routines
649      (applies in particular to tapelev I/O)
650    o removed inefficient K-loop in all active_file*control*.F
651    
652    checkpoint57m_post
653    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
654      and advect_cs (use EXCH-2 and standard cs-32 grid files).
655    o pkg/exch2: filling of face-corner halo regions is optional
656      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
657    
658    checkpoint57l_post
659     tag before updating tutorials (pre-release-2)
660    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
661       for output and interpolation of input fields onto model grid)
662    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
663       Affects results of exp. rotating_tank ; update output.txt.
664    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
665          and taking the square quantity and/or using a fraction-weight field.
666    o fix aim_diagnostics_init.F mate numbers.
667    o add mnc output capability to diagnostics/diagstat and update
668      our cvsignore files for the ACSII output generated
669    
670    checkpoint57k_post
671    o lab_sea now uses diagnostics package and provides a suite of
672      new EXF diagnostics output.
673    
674    checkpoint57j_post
675    o exf
676      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
677        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
678        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
679      * extended diagnostics output
680        - now includes all EXF variables
681        - hs, hl moved to common block
682        - separate S/R for diagnostics, called after ctrl vector is added
683        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
684        - EXFqnet contains true Qnet (i.e. includes qsw)
685      * updated verif. lab_sea, global_with_exf
686      * Rearranging hflux (exf_mapfields -> exf_getforcing)
687        to ensure that diagnostics sees a true EXFqnet
688    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
689    o diagnostics pkg: change pointers so that 1 diagnostic can be used
690      several times with different frequencies.
691    o mnc-ify the thsice package as requested by Daniel Enderton
692      - the monitor--MNC output needs work
693      - many attributes need to be added (most are currently blank)
694    o mnc-ify theaim_v23 package as requested by Daniel Enderton
695      - many attributes need to be added (most are currently blank)
696    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
697    o add Sadourny like discretization to the 4th.O vorticity advection scheme
698    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
699      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
700         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
701    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
702     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
703    
704    checkpoint57i_post
705    o Diagnostics package was changed: diagnostic allocation is now deactivated
706      by setting an empty file name in the namelist (used to be by setting 0 frequency)
707    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
708      add 1rst Order upwind vertical Shear.
709    o add a quick fix for A/B checkpointing in OFFLINE mode
710    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
711      end-run around the C/Fortran linking horror in eesup/src/timers.F
712    o added pkg/runclock: allows user to terminate run based on wall clock
713    o added non-hydrostatic scaling parameter: nh_am2
714    o pkg/my82: futile attempt to make results compiler-independent by adding
715      some "_d 0", etc. no effect.
716    o for mnc output, fill the 'T' coordinate var with myTime and create a
717      separate 'iter' variable for iteration count
718    o pkg/diagnostics:
719      add new capability: output of Global/Regional & per-level statistics ;
720      tested against monitor output (including land & thSIce) on various exp.
721    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
722    
723    checkpoint57h_done
724      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
725      data.diagnostics, data.gchem, data.ptracers) is done.
726    
727    o pkg/diagnostics: prepare for Global/Regional statistics.
728      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
729    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
730      and rename it: DIFFERENT_MULTIPLE
731    
732    checkpoint57h_post
733    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
734    o pkg/diagnostics: change output frequency, now in seconds (instead
735      of Nb of iterations). This requires to change data.diagnostics.
736    checkpoint57h_pre
737    
738    o in mnc, let the user create the output dir if both mnc_outdir_date
739      and mnc_outdir_num are false
740    o add fflags() to pkg/diagnostics which allows one to specify, on a
741      per-file basis, the file precision [default behavior is unchanged]
742    o added diagnostics to pkg/kpp, including computation of mixed layer
743      depth based on a temperature/density criterion
744    o updated verification/natl_box to test the new pkg/kpp diagnostics
745    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
746    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
747    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
748      not mnc -- this mistake was found by JMC and is now corrected
749    
750    checkpoint57g_post
751    o add Adams-Bashforth 3rd Order time stepping:
752      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
753      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
754    checkpoint57g_pre
755    
756    o make lambda[Theta,Salt]ClimRelax spatially varying
757      (default remains spatially uniform constant based on tau)
758    o added new control variables
759      * init. uVel, vVel, etanN
760      * lambda[Theta,Salt]ClimRelax
761    o separate masks used for ctrl_pack/unpack 'from write_grid' output
762      (suggested by G. Forget)
763    
764    checkpoint57f_post
765    o add parameter "baseTime" = model base time = time at iteration zero
766      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
767      account for baseTime shift
768    o move Coriolis arrays from PARAMS.h to GRID.h
769    checkpoint57f_pre
770    
771    o mnc-ifying the seaice package
772    o introduced an alternative length scale calculation for use in the limiting
773      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
774    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
775    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
776      as well as grad(vort3).  Made it compatible with both approximate form
777      for the cubed sphere and full form of these gradients.  Added flag
778      useFullLeith to select between approximate and full form.  
779    o add "d0" in getcon.F to reduce differences between compilers/platforms
780      update output.txt of exp. fizhi-gridalt-hs
781    o change port_rand funtion to allow to set the seed.
782    o fix obscure MNC bug involving conversion between reals and integers
783      - it caused no problems with certain (eg. gcc, ifc) compilers but the
784        new version is now more standards-compliant
785    o adjoint-related modifications
786      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
787      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
788      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
789    
790    checkpoint57e_post
791    o Adding eddy stress controls a la Ferreira et al.
792    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
793    
794    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
795      update output.txt of exp. fizhi-gridalt-hs
796    o add more "Z" dimensions and associated coordinate vars to MNC
797    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
798    o parameter calendarDumps: when set, approximate months (30-31 days) and years
799      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
800      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
801      months and years.  Requires pkg/cal.
802    o diagnostics: add pickup functionality
803      - off by default for backwards compatibility
804      - current version only uses MDSIO -- MNC will be added
805    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
806    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
807    
808    checkpoint57d_post
809    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
810    o modify verification/ideal_2D_oce so that it tests the creation of mnc
811      output from the diagnostics package
812    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
813    o make genmake2 more portable by using ".$FS" instead of ".f" for more
814      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
815    o add coordinate variables to the MNC output from the diagnostics package
816    o change MNC-flags default value: true when useMNC=TRUE
817    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
818      the ability (off by default) to read the grid information using MNC
819    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
820    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
821    o do snap-shot diagnostics at the middle of the time-interval (instead of
822      at the end).
823    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
824      new test for AIM with thSIce + slab-ocean
825    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
826    o move state variable diagnostics to the beginning of the time step ;
827      (note: still needs some work specially for snap-shot diagnostics)
828      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
829    
830    checkpoint57c_post
831    o Change testing option (-ieee) to get closer agreement between g77 & ifort
832    o generate new output.txt files on faulks with g77 & the new -ieee option
833    checkpoint57c_pre
834    
835    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
836      update output.txt of exp. global_ocean.90x40x15
837    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
838      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
839    o add saltFlux(+File) forcing capability with periodicExternalForcing
840    o allow to use pkg diagnostics for GM-Redi & ThSIce output
841    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
842    o improvements for the MNC output from DIAGNOSTICS:
843      - correct handling of the unlimitied dimension
844      - all dims now have associated coordinate variables
845      - variables located at U, V, and Corner ("Z") points are now written
846        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
847        *all* data points are output
848    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
849    o added pkg/seaice/seaice_monitor.F
850    o mdsio_readfield.F can now read files visible only to master MPI process.
851    o pkg/seaice: some test code for ice-modified ocean stress
852    o exf_getffields interpolation defaults to bilinear for all scalar forcing
853      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
854      spurious negative numbers for precipitation and humidity.  Will cause
855      some small numerical differences for integrations using pkg/exf/exf_interp.F.
856    o pkg/ctrl/
857      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
858        May be enabled via doPackDiag
859      *  introduce z-scaling of
860         + gradient (doZscalePack) and
861         + control (doZscaleUnpack)
862    o pkg/mdsio/
863      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
864      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
865    
866    checkpoint57b_post
867    o simplify options in diagnostics_fill arguments (remove weird combinations)
868    o fix MNC coordinate variables so that they now contain per-face index
869      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
870      general, EXCH2 grids are only aligned to a "local" coordinate system
871    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
872    o Implement instantaneous output within pkg diagnostics:
873      setting a negative frequency in data.diagnostics produces
874     "snap-shot" output (as opposed to time-average if freq > 0)
875    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
876      NOTE: change ptracer diagnostics name: use 2 characters to work with
877            more than 9 tracers. Add also diagnostics of advect & diffus flux.
878    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
879      becomes the coordinate variable for the 'T' dimension
880    o add CF-style coordinate variables to MNC
881      - just a first cut:  numbers are meaningless on the cubesphere and
882        missing along the T axis but otherwise it works!
883    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
884    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
885    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
886      this is based directly on what the model compute, so that the content of
887      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
888    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
889    o clean up build options files for SunOS, in particular
890      - remove -traditional from xmakedepend
891      - change -xarch=v9 to -xarch=native for f77
892      - restore use of make (not gmake)
893      - add CC=gcc if using g77
894    o changes per discussion of AM, JMC, & EH3 today:
895      - move redundant "grid" variables out of "state" -- in preparation of
896        creating proper CF-style coordinate variables and in recognition
897        that any/all grid variables can be easily copied (eg. w/NCO) from
898        the grid files into any of the other NetCDF files
899      - *always* output grid variables with MDSIO (this will eventually be
900        changed)
901      - output MNC grid file if useMNC is true
902    o every instance of _END_MASTER() has been found and replaced with
903      _END_MASTER( myThid ) in order to satisfy certain picky Sun
904      preprocessors
905    o re-arrange diagnostics pkg initialisation:
906     - allow each package to extend the available diagnostics list
907     - add some checking and fix small problems (multi-threaded, ...)
908     - new S/R diagnostics_fill (replace fill_diagnostics):
909       look through the short list of active diag. (instead of the long list)
910       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
911    
912    checkpoint57a_post
913    o this set of changes restores TAMC compatibility
914      tested for global_ocean.90x40x15 adjoint on trough
915      (what a pain)
916    
917    checkpoint57a_pre
918    o some modifs in tools/build_options for sunos
919    o call ctrl_pack for ctrl at end for optimcycle=0
920    
921    checkpoint57
922    o add horizontal bi-harmonic viscosity for vertical velocity
923      - new parameter viscA4W (defaults to viscA4)
924      - affects only non-hydrostatic code
925      - to be done: no-slip lateral boundary conditions
926    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
927    o implement Implicit Vertical advection for pTracers
928    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
929      (implemented also for implicit vertical diffusion & advection)
930    o OBCS: extend application of tracer open boundary conditions
931      to a strip beyond the boundary of width Olx/Oly
932    o add call monitor to TAF set of required calls (flow directives)
933      and include in natl_box_adjoint
934    o untangle a few ifdefs related to cost, ctrl, autodiff
935      untangel a few ALLOW_ECCO_OPTIMIZATION
936    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
937      (theta2, salt2 in ecco_cost_weights)
938    
939    checkpoint56c_post
940    o OBCS as control variables
941      - update ctrl_ad_diff.list, obcs_ad_diff.list
942      - remove balance of obcs controls from default
943      - fix index bug nobcs in ctrl_init
944      - fix dummy fields filen in ctrl_pack
945      - add dummy weights for obcs
946    o lsopt: comment out fort.94 output
947    o optim:
948      - remove unnecessary header files
949      - adjusted namelists
950      - add xerbla.F to Makefile
951    o exf:
952      - multiple modifications of exf_check_range
953      - unit change in exf_init_runoff from [m/year] to [m/s]
954    o mdsio:
955      - i/o-vector change debugLevel from debLevA to debLevB
956    
957    checkpoint56b_post
958    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
959      is called from DO_THE_MODEL_IO
960      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
961      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
962      - clean up PTRACERS_WRITE_TIMEAVE a little
963    o add another verification experiment that tests both the cfc-pkg and
964      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
965      reactive tendencies treated inline with regular timestepping
966    o testreport previously did a lousy job of comparing small numbers, so
967      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
968      implemented in the little c-progam tmp_cmpnum.c which is embedded in
969      testreport.
970    o ptracers_monitor: bug fix for MPI
971    
972    checkpoint56a_post
973    o GCHEM: finish reorganizating the package
974      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
975        (introduces another 3D-array for each passive tracer, but only if
976        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
977        gchemTendency is not needed because the timestep is done separately)
978      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
979      - GCHEM is now---more or less cleanly---separate from PTRACERS
980      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
981        so clear to me how that should be done in a general way.
982    o CFC: improve formatting of output in CFC_ATMOS
983    o PTRACERS:
984      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
985        that ALL experiments with ptracers enable can be checked. This makes
986        GCHEM_MONITOR obsolete.
987      - include a runtime parameter PTRACERS_monitorFreq that defaults to
988        monitorFreq
989      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
990    o add PTRACERS (PTR0[1-5]) to testreport output
991    o exf_check_range:
992      * default changed to .TRUE.
993      * will check values for niter0 if debLevA, every timestep if debLevB
994      * STOP in exf_check_range if 'out of range'
995      * range chosen generous to allow for potential extema
996      TBD: a version with stricter range
997           permitted range would be runtime parameters
998    o GMredi:
999      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1000      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1001      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1002    o GCHEM:
1003      - move call to GCHEM_FORCING_SEP, so that it is now called before
1004        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1005      - introduced a useGCHEM runtime flag and applied it everywhere.
1006      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1007        this flag is now only visible within GCHEM-pkg routines.
1008      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1009        be replaced by a 3D array that is computed before thermodynamics; for
1010        this, the tracer ID iTracer had to be included into the parameter list
1011        of ptracers_forcing
1012      - set up forward_step to call gchem_forcing, that will replace
1013        gchem_forcing_int in ptracers_forcing
1014      - cleaning up
1015    o small cleaning of exch2: remove files that are also in eesupp/src
1016    
1017    checkpoint56
1018    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1019    o mnc: cleanup "full" files--fixes out-of-memory problem
1020    o ECCO-GODAE
1021      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1022      * fully merged and updated from SIO code
1023        windstress sign change affects
1024        - exf_inscal_[u/v]stress
1025        - sign of xx_tau[u/v] adjustments
1026        - signs in cost_scat
1027      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1028      * natl_box_adjoint updated and compressed
1029      * 2-level checkpoint switch added
1030        (tested in EXP. 1 of natl_box_adjoint)
1031      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1032    o SVD
1033      * first complete, non-hacked version for SVD calculations
1034      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1035        performed via direct access files admtlm_vector.it????
1036        (via ctrl_[un]pack)
1037      * optimcycle is used for ARPACK iteration counter
1038        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1039      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1040        and add linear transforms where necessary
1041      * controls are initial/final SST, SSS (can be extended; need to check
1042        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1043    o mdsio: filename info to both stderr, stdout
1044    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1045      from sign change
1046    
1047    checkpoint55j_post
1048    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1049      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1050    o add consistent build directories and .cvsignore files to verification
1051    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1052    o make all subroutines 30 or less characters in length for certain older
1053      compilers to work (a thorough search only turns up two routines in
1054      pkg/ptracers)
1055    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1056      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1057    
1058    checkpoint55i_post
1059    o change arrays for total vertical diffusivity (2.D if explicit,
1060      3.D if implicit) ; each ptracer uses its own background value.
1061    o added mnc/NetCDF output capability to ocn_compon_interf
1062      - added bits to verification/cpl_aim+ocn so that it can run on
1063        ITRDA and other clusters without the mpirun "-wd" option
1064    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1065      configuration
1066    o give MNC the ability to create additional files rather than
1067      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1068      - the default is just less than 2GB which is a practical limit
1069        on many systems
1070    o Compute the non-local term using either KPP vertical diffusivity (=default)
1071       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1072    
1073    checkpoint55h_post
1074    o add verification test "vermix"
1075    o remove all the *_ioinc flags and replace with the single global
1076      outputTypesInclusive flag
1077    o allow to set a vertical profile of vertical diffusivity for T & S
1078    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1079    o useMNC moved from data.mnc to data.pkg
1080    
1081    checkpoint55g_post
1082    o Renaming carbon AD experiments to comply with testreport conventions
1083    o Updating adjoint of Held-Suarez hs94.1x64x5
1084    o Fixing directives for non-ECCO forward_step, after ECCO directives
1085      have been fixed to avoid recomp. of do_oceanic_phys
1086      Works well for global_ocean.90x40x15,
1087      but recomp. issue remains for carbon
1088    o Updating adjoint output for natl_box_adjoint after
1089      pkg/ecco has been modified (see taga c55d_post)
1090    
1091    checkpoint55f_post
1092    o rename to timeave_init_fixed
1093    
1094    checkpoint55e_post
1095    o some delicate re-shuffle of store directives to avoid one
1096      extra call of do_oceanic_physics
1097      affects ecco_the_main_loop.F, do_oceanic_physics.F
1098      checkpoint_lev1_directives.h
1099    o NB: this may break global_ocean adjoint temporarily,
1100      but it is clear how to fix it. Will do later, need this now.
1101    
1102    checkpoint55d_post
1103    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1104    o ecco_cost_weights is modified to 1x1 runs
1105    o modifs to allow observations to be read in as
1106      single file or yearly files
1107    o enable to read exf forcing fields as either
1108      single file or yearly files (flag useExfYearlyFields)
1109    checkpoint55d_pre
1110    
1111    o switch between 2-level and 3-level checkpointing
1112    o add ability of MNC to write local and "partial" (eg. 2D slices where
1113      the full 3D field is never actually stored) arrays to NetCDF files
1114      with the correct (that is, the complete multi-dimensional) set of
1115      array indicies
1116      - used in mom_vecinv() to write the diagFreq output
1117      - tested (demonstrated) in verification/aim.5l_cs
1118    o further mnc-ification
1119      - add verification/lab_sea to the list with mnc setups
1120      - fix undefined mnc v-names in cd_code
1121      - add kpp to mnc output (both snapshot and timeave)
1122    o non-hydrostatic code
1123      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1124        in calc_gw.F
1125      - defaults to viscAh
1126      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1127        friction or Leith) in non-hydrostatic mode, as long as there is
1128        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1129    o pkg/cost
1130      extend simple cost functions to treat time mean quantities
1131      (T,U,V) via cost_accumulate_state from cost_tile
1132    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1133        be 2 times larger than the minimum size the advection scheme requires.
1134        now get a perfect conservation of salt in advect_cs test-exp (updated)
1135    o GGL90 (Gaspar's TKE mixed layer)
1136      - add horizontal diffusion of TKE, requires exchanges in
1137        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1138        default. In OPA there is no horizontal diffusion of TKE but the
1139        mixing coefficients are computed from a horizontal average of TKE of
1140        6 points or so. I think that diffusion has a little more physical
1141        justification.
1142      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1143        was in vain)
1144      - mask tke-variable in ggl90_init
1145    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1146    o fix biharmonic diffusion on CS-grid.
1147    o more obcs stuff
1148      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1149        for reading boundary values. This routine is called from
1150        obcs_prescribe_read
1151      - updated obcs_check
1152      - changed sponge layer relaxation parameter units for days to seconds
1153      - turned off sponge layer by default
1154      - changed argument list of OBCS_CALC to myTime+deltaTclock
1155      - fixed about 35 bugs in obcs_external_fields_load
1156    
1157    checkpoint55c_post
1158    o obcs stuff
1159      - new runtime flags useOBCSprescribe, useOBCSbalance
1160      - re-arranged obcs_calc
1161      - moved exf_getobcs to obcs_prescibe_read
1162        obcs_prescibe_read is called after ORLANSKI stuff
1163        and independent of it (executable can contain all).
1164      - updated obcs_check
1165      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1166        These may be necessary only if tangential velocities are
1167        prescribed at OB, not sure, needs testing.
1168    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1169      which simplifies the calls and passes the ifc check-bounds test
1170    
1171    checkpoint55b_post
1172    o add a 2D scalar, Z location, exchange_2 routine.
1173    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1174      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1175      affects advect_cs results (for the wrong reason): update output.txt
1176    o use a more standard discretization for biharmonic viscosity ;
1177     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1178      affects results of dome set-up: update output.txt
1179    o fix gad_advection.F (CubedSphere part), back to version 1.23
1180    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1181    
1182    checkpoint55a_post
1183    o merged code to
1184      * prescribe/read time-dependent open boundaries
1185        (works in conjunction with exf, cal)
1186      * sponge layer code for open boundaries
1187      * each boundary N/S/E/W now has its own CPP option
1188        (healthy for the adjoint)
1189    
1190    checkpoint55
1191    o up-to-date adjoint of previous breaks
1192      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1193      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1194      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1195      - carbon: * remove tr1-related adjoint verification
1196                * add ptracer as control variable
1197    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1198      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1199    
1200    checkpoint54f_post
1201    o in verification/carbin/ remove experiment related to
1202      ALLOW_PASSIVE_TRACER (array tr1 etc)
1203      code_ad/ input_ad/ results_ad
1204    
1205    o add two new packages
1206      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1207        + subject to optimization (memory)
1208      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1209        + subject to reordering (many GOTOs in the original code)
1210        + so far opps is called for every (i,j) point, and then operates in
1211          the vertical; one may want to reorder the scheme in order operate in
1212          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1213          fields)
1214    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1215      - all verification tests compile and run with linux_ia32_g77
1216      - defaults are compatible with current input files--nothing
1217        should change if you were not previously using MNC
1218      - MNC output has been added in numerous places (eg. timeave)
1219        but there are still a few writes not yet do-able with MNC
1220        (this is in progress)
1221      - flags now allow for either/or/both use of MDSIO and MNC and
1222        documentation will soon follow
1223      - numerous small formatting cleanups for ProTeX
1224    o add version info (via BUILD_INFO.h) to MNC and stdout
1225    
1226    checkpoint54e_post
1227    o add two new packages
1228      - pp81 (Packanowski and Philander, 1981), Richardson number and
1229        stratification dependent mixing
1230      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1231      - these scheme operate in a similar manner as KPP (without ghat, of
1232        course), however there is only one diffusivity that is used for both
1233        temperature and salinity (and passive tracers)ç
1234    o add offline package
1235    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1236      provided by Stephanie Dutkiewicz
1237    o genmake2: add ability to search for C compilers and cleanup test output
1238      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1239    
1240    checkpoint54d_post
1241    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1242    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1243      leading to additional shift by 5 days each year of integration
1244       (i.e. leading to considerable offset over the years)
1245    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1246    o start with no AB and no initial filtering (staggerTimeStep):
1247      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1248    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1249      (external loading & cpl import/export stay in forward_step.F)
1250    o update coupling interface to work with new staggerTimeStep
1251    o change MDSIO ptracers_pickup.
1252    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1253    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1254    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1255    
1256    checkpoint54c_post
1257    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1258      this affects (truncation error) output.txt of test-exp:
1259       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1260    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1261    o change Qnet to always be the net heat flux, (+upward).
1262      affects (truncation error) output of natl_box exp.: updated
1263    o define the max number of passive tracers in PTRACERS_SIZE.h
1264    o start to test mnc routinely in exp0
1265    o add sea-ice loading (sIceLoad) as a new forcing field.
1266    
1267    checkpoint54b_post
1268    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1269       impressive on Altix and Opteron systems)
1270    o diagnostics can now write NetCDF files through the mnc package
1271    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1272    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1273    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1274      affects (truncation error) output of lab_sea & natl_box exp.: updated
1275    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1276    
1277    checkpoint54a_post
1278    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1279    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1280    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1281    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1282      + internal_wave (shift in writing cg2d_ini_res)
1283    checkpoint54a_pre
1284    
1285    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1286      - modified verification/lab_sea and natl_box_adjoint accordingly
1287    
1288    checkpoint54
1289    checkpoint53g_post
1290    o prepare splitting of thermodynamics: store convect.counter in common block
1291    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1292      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1293    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1294    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1295    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1296    o restore adjointability
1297    
1298    checkpoint53f_post
1299    o modifications that affect AIM experiment results (update output.txt):
1300      - no advection of S at top interface Nr (pkg/generic_advdiff)
1301      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1302    o AIM pkg:
1303      - include stability function into surf.Flux derivative relative to Tsurf
1304      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1305    
1306    checkpoint53e_post
1307    o merged cylindrical coord configuration
1308    o added rotating_tank experiment
1309    checkpoint53e_pre
1310    
1311    checkpoint53d_post
1312    o faulks upgraded: re-generate output.txt that have changed:
1313       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1314    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1315    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1316    o added Sadourny discretization of Coriolis
1317      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1318      - re-enabled use of omega3 (useAbsVorticity)
1319    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1320      vector-invariant equations
1321      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1322    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1323      hopefully without new bugs
1324      - still to do: biharmonic friction for non-hydrostatic w
1325    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1326    o regenerated output for global_ocean_ebm (using -ieee)
1327    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1328      of mom_common/
1329      - simple re-arrangement of instructions within computing loop
1330    checkpoint53d_pre
1331    
1332    checkpoint53c_post
1333    o new version of coupler for AIM+thSIce and Ocean models
1334     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1335     - land: change Evaporation of snow
1336     - aim with thSIce: fix bug in snow-precip.
1337    o changes to calc_gw.F
1338     - bug fix for w^2 term near the bottom boundary
1339     - (hopefully) improve the lateral slip boundary condtions for use with
1340        partial/looped cells
1341      - because the bug fix changes two verification experiments anyway (exp5
1342        and plume on slope), change the lateral boundary condition from half slip
1343        to the value of no_slip_sides
1344    o ebm package wasnt quite up to the parallel task. Fixed that.
1345    o Adjoint of EBM package + verification
1346      * TLM OK
1347      * ADM not sufficient accuracy yet (needs further testing)
1348    
1349    checkpoint53b_post
1350    o Commiting new energy balance model to repository
1351      * package is pkg/ebm
1352      * verif. is verification/global_ocean_ebm
1353      * references are in ebm_driver.F
1354    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1355    C        Global thermohaline circulation. Part I:
1356    C        Sensitivity to atmospheric moisture transport.
1357    C        J. Climate 12(1), 71-82
1358    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1359    C        Global thermohaline circulation. Part II:
1360    C        Sensitivity with interactive transport.
1361    C        J. Climate 12(1), 83-91
1362    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1363    C        Destabilization of the thermohaline circulation
1364    C        by atmospheric eddy transports.
1365    C        J. Climate 7(12), 1870-1882
1366    o Will need long integration testing.
1367    checkpoint53b_pre
1368    
1369    o created pkg/mom_common in preparation for variable viscosity code
1370    o renamed and split ini_mnc_io
1371    o pkg/land: only liquid water can diffuse or run-off
1372    o AIM using land: soil wetness availability account for snow
1373    o added printMapIncludesZeros to EEPARMS namelist
1374    
1375    checkpoint53a_post
1376    o restore TAMC compatiility for exf_constants.h
1377      (no usage of _d in .h)
1378    o Additional storing in KPP in an attempt to fix
1379      TAMC problem with adjoint of KPP code.
1380      (no success...)
1381      Identical code works fine with TAF.
1382    o Fixed verification/natl_box_adjoint experiments.
1383      Initial conditions for Experiments 4 and 5 are now
1384      set to "SEAICE_initialHEFF=0", which is more reasonable,
1385      and hence gives results closer to that of Experiment 2.
1386      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1387    
1388    checkpoint53
1389    o stable checkpoint with up to date adjoint
1390      TLM tests only run for 1st grdchk at the moment. Its unclear if
1391      this is a code problem or a problem with resetting code for g_
1392      variables that is being autogenerated wrong.
1393      Otherwise:
1394       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1395       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1396         are both still in chaos following their security messes.
1397    
1398    checkpoint52n_post
1399    o various build (mostly genmake2) changes including:
1400      - ability to build/run more easily within Cygwin and MacOS X
1401      - more complicated Makefiles with a stronger dependence on Gnu Make
1402    o pkg/seaice modifications
1403      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1404        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1405        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1406      - changed proxy for geostrophic velocity and updated
1407        verification/lab_sea/results/* accordingly
1408      - removed ADI dynamic solver from pkg/seaice
1409      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1410        they caused a segmentation fault under certain circumstances
1411      - removed unused field WATR
1412    o bug fix in exf-package:
1413      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1414         now reflect that.
1415    o small fixes in the cal-package:
1416      - set reference date to first of January for the 'model'-calendar
1417      - failing of cal_CheckDate in cal_FullDate now actually results in a
1418        warning
1419    o small modifications in exf-package to increase flexibility:
1420      - change climtempfreeze from a constant to a runtime parameter that
1421        is specified in data.exf_clim (default = -1.9)
1422      - introduce runtime parameter windstressmax (default = 2.0) that is
1423        specified in data.exf
1424    o fix in pkg/thsice:
1425      - update Evap (Tsf changes) to be consistent with Latent heat flux
1426      - maintain snow precipitation unchanged (even if Tsf >=0).
1427     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1428    
1429    checkpoint52m_post
1430    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1431      this does not change any of the results, because myIter=0 in swfrac always
1432      lead to jwtype=2 (the default anyway), but the call makes little sense
1433      as a default
1434    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1435    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1436      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1437    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1438    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1439    o extending useSingleCpuIO option to work with new exch2 I/O format
1440      - old-style, missing-tile I/O is still accessible by defining CPP
1441        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1442    o monitor package can write to NetCDF files and/or STDOUT
1443    o fix re-definition bug in MNC_GRID_INIT_ALL()
1444    o doc/api_reference added
1445      - a framework for building an API Reference Manual using all
1446        the "protex" comments embedded in the code
1447      - see pkg/generic_advdiff, pkg/mnc for examples
1448    o MNC:
1449      - make myThid the last argument for all subroutines
1450      - new default for the grid files: NO halos
1451      - add useMNC and other run-time flags
1452      - separate per-file-group handling of the unlimited dimension
1453      - early initialization of MNC w/ flags read at the eeboot stage
1454        and lookup tables set in initialize_fixed
1455      - write all MNC output to a freshly-created directory
1456    o thermodynamics sea-ice (thsice) is now tested with testreport.
1457    o test exp. advect_cs: use the standard cs32 grid ; update output.
1458    o Added functionality to grdchk:
1459      pick global i,j,k position (or nearest wet) where to perform check.
1460    
1461    checkpoint52l_post
1462    o new land formulation:
1463      a) use ground enthalpy as prognostic variable to ensure exact
1464         energy conservation.
1465      b) account for water temperature and for latent heat of freezing
1466         in all processes (rain, run-off, ground storage)
1467      c) compute surface and ground temperature implicitly.
1468    o aim_v23 modification for new land model:
1469      a) Treat separately land / ocean / sea-ice surface fluxes
1470         to allow implicit computation of land & sea-ice surface temp.
1471      b) add snow precipitation.
1472    checkpoint52l_pre
1473    
1474    o fix problem (when 1 tile is empty) in min/max monitor.
1475    o fix bug in timeAve (u,vZetatave in common block)
1476    o no restoring terms under ice for pkg/seaice
1477    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1478    o bug fix for pkg/seaice pickups
1479    o change MNC call locations and add coordinate attributes
1480    o mask vorticity at the corner ; affects global_ocean.cs output
1481    o fix ini_curvilinear_grid ; test CS experiments with mpi
1482    o aim.5l_cs: modify sea-ice fraction input file ; update output
1483    o exf: Adding simple range check routine for exf fields after read
1484    
1485    checkpoint52k_post
1486    o removed top-level directory "diags"
1487      - we migrated these functions to pkg/timeave a long time ago
1488    o fixed bug introduced in pkg/monitor
1489    o accuracy ctrlprec = 32 insuffient for gradient checks using
1490      averaged fields (I/O via cost_averages)
1491      -> use ctrl.h in active_file*.F to control I/O precision.
1492    o paramter list of CALL ADTHE_MAIN_LOOP
1493    o added initial do_the_model_io to ecco
1494    o set all ...Freq to zero after cost_final
1495      taveFreq, dumpFreq, pChkptFreq
1496    o MAIN and ECCO differentiability restored
1497    
1498    checkpoint52j_post
1499    o fix nchklev in tamc.h for global_ocean...
1500    o Bringing flow and store directives up-to-date
1501    o Really weird thing!
1502      call do_the_model_io from the_main_loop with parameters
1503      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1504      TAF places a faulty re-call of initialise_varia
1505      after cost_final call which should not be there!
1506    checkpoint52j_pre
1507    
1508    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1509      error messages
1510    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1511    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1512      debug output
1513    o modfied mdsio_writefield.F to handle non-global files under exch2
1514    o update AIM Cubed-Sphere exp (aim.5l_cs):
1515      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1516    o update AIM Equatorial Channel exp:
1517      use standard aim_v23 pkg and change the SST fields to be more realistic.
1518    o globalFile now works with exch2
1519    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1520      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1521    o limit timeave output for hi-res integrations
1522    
1523    checkpoint52i_post
1524    o removed CPP_EEOPTIONS.h from verification/*/code
1525    o updated the tiling for global_ocean_pressure
1526    checkpoint52i_pre
1527    
1528    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1529      the old pkg/aim).
1530    
1531    checkpoint52h_pre
1532    o shortened offending lines in exch2_send_rx?.template
1533    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1534    o genmake2: add build & execute test for NetCDF code
1535    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1536      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1537    o added useSingleCPUIO flag to monitor.F and mon_out.F
1538    o added temporary hack for sea-ice dynamics on the cube:
1539      metric terms are ignored and it is assumed that
1540      there is no sea-ice on cube faces 1, 2, 4, and 5.
1541    
1542    checkpoint52f_post
1543    o added exch2 cube routines to pkg/exch2
1544    o modified hs94.cs-32x32x5 to use it
1545    o added new grid files to hs94.cs-32x32x5
1546    checkpoint52f_pre
1547    
1548    checkpoint52e_post
1549    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1550      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1551    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1552      to work with implicit vertical advection and AB ;
1553    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1554    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1555     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1556    checkpoint52e_pre
1557    
1558    o fix bug in impldiff when Nr=1 or Nr=2.
1559    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1560    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1561    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1562      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1563    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1564    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1565    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1566    
1567    checkpoint52d_post
1568    o re-tiled many expts to allow comparison in multi-processor mode
1569      - updated output accordingly
1570      - changed hs94.128x64x5 to use intial T from file rather than use the
1571        random number generator
1572    o add infrastructure in model routines for fizhi and gridalt packages
1573    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1574    o changes to permit hi-res, cubed-sphere, configuration
1575      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1576      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1577      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1578        of surface winds for the cube
1579      (A verification experiment, based on global_ocean.cs32x15, but with
1580       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1581       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1582       complete with example surface forcing files and matlab scripts to look
1583       at the output and compare it with that of global_ocean.cs32x15.)
1584    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1585       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1586       to conform to the common rule.
1587    o check-in the first version of the coupler + interfaces for multi-components
1588       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1589       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1590       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1591       - ocean and atmos. share the same horizontal grid (no interpolation).
1592       - exchanges between component and coupler is done in forward_step
1593    o new verification experiment, cpl_aim+ocn:
1594       coupled ocean - AIM atmosphere on cs32 grid.
1595    
1596    checkpoint52d_pre
1597    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1598    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1599    
1600    checkpoint52c_post
1601    o Fixing OPTIONS files for use of exf:
1602      - ALLOW_ECCO not needed
1603      - ECCO_CPPOPTIONS.h should not be included from
1604        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1605        as has been the case in the past
1606      - All cal/exf related options are currently set in
1607        single header file. Should remain so until we
1608        agree on a consistent new policy.
1609    o Removed all CPP options for cal package.
1610      cal has no more CPP options.
1611    o modified STOREs in GAD_ADVECTION
1612    o corrected key comp. for passkey
1613    
1614    checkpoint52b_post
1615    o new version: "thsice" of thermodynamic sea-ice pkg:
1616     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1617     - modify fluxes but do not change theta directly;
1618     - light cleaning of bulk_force pkg (still needed with thsice).
1619     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1620       + output_thsice.txt to test thsice & bulk_force pkgs.
1621    o put back grid & coriolis monitor output.
1622    checkpoint52b_pre
1623    
1624    o call "do_the_model_io" at the beginning (=> dump initial state)
1625    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1626    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1627      (need info on NUMBER_OF_PTRACERS)
1628    o missing PTRACERS headers in some routines
1629    o default tamc.h in pkg/autodiff supposed to crash
1630      to ensure proper customization
1631    
1632    checkpoint52a_post
1633    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1634      - moved surfaceTendencyTice from pkg/seaice to main code
1635      - subroutine FREEZE_SURFACE now limits only surface temperature
1636        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1637        => new output.txt for global_ocean.cs32x15 & global_with_exf
1638      - keep the old version of FREEZE for backward compatibility;
1639        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1640      - corresponding modifs for TAF directives
1641    o added surface flux output variables to TIMEAVE_STATVARS
1642    o time-averaged output for pkg/ptracers
1643    o fix problem with ECCO-related divided adjoint
1644      snapshot file was missing some ad-variables,
1645      but no warning issued by TAF
1646    
1647    checkpoint52a_pre
1648    o some bug fixes for #undef REAL4_IS_SLOW
1649    
1650    checkpoint52 = ecco_c52_e35
1651    o after testing adjoints of checkpoint51u_post
1652    
1653    checkpoint51u_post
1654    o this is the post-merge tag of the ecco-branch
1655      (needs another clean checkout and re-testing)
1656    o various natl_box_adjoint configs and results
1657      but no input fields
1658    o obcs adjoint not yet merged!
1659    o adding ECCO global 1x1 and 2x2 degree configs
1660    o updated/extended some store directives for seaice
1661    o pkg/ecco now containes ecco-specific part of cost function
1662    o top level routines the_main_loop, forward_step
1663      supersede those in model/src/
1664      previous input data.cost now in data.ecco
1665      (new namelist ecco_cost_nml)
1666    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1667    
1668    checkpoint51t_post
1669    o this is the pre-merge tag of the ecco-branch
1670    
1671    checkpoint51s_post
1672    o cleanup: removed various obsolete #define-s
1673    o pkg/grdchk
1674      - renamed 'ph-grd 3' to 'grad-res'
1675      - merged from ecco-branch
1676        (remaining bug fixes for obcs gradient checks)
1677      - additional high-precision output for testreport
1678        (grep for 'precision_grdchk_result')
1679    
1680    checkpoint51r_post
1681    o cleaned up or removed CPP_OPTIONS.h files
1682    o updated results for some of the tests to reflect the new
1683      optfiles (-ieee: -O0 instead of -O3)
1684    
1685    checkpoint51q_post
1686    o cd_code:
1687      - moved cd_scheme.F -> cd_code_scheme.F
1688      - separate read_checkpoint from cd_code_ini_vars.F
1689      - separated cd_code part from write_checkpoint
1690      - updated AD_SOURCE, generated .flow
1691      - added CD_CODE_VARS.h to the_main_loop
1692      - Moving cd_code specific store dir.s to pkg/cd_code
1693    o ctrl package totally restructured
1694      - pack/unpack now optional and decoupled from
1695        xx_/adxx_ I/O
1696      - ctrl_pack/unpack cleaned
1697        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1698      - confined inclusion of AD_CONFIG.h to where necessary.
1699    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1700    
1701    checkpoint51p_post
1702    o create initial cd_code package
1703      - WARNING: the initialization of fields within packages
1704        is broken because INI_FIELDS (where READ_CHECKPOINT is
1705        called) is called *before* PACKAGES_INIT_VARIABLES.
1706        This seems to be backwards since
1707        1) its important to initially zero the entire field including
1708           the "halo" region
1709        2) zeroing needs to be done *before* reading pickup info
1710           and the pickup call might or might not happen in any
1711           particular run
1712      - this needs an overhaul for R2
1713    o cleanup verification/*/code/GMREDI_OPTIONS.h
1714    o cleanup testreport
1715    
1716    checkpoint51o_post
1717    o bringing AD-related verif's up to date with genmake2
1718      - carbon/
1719      - global_ocean.90x40x15/
1720      - hs.94.1x64x5/
1721      - (front_relax/ )
1722    o (more) consistent directory structure for AD-related verif.'s
1723    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1724    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1725    o bug fix in find_alpha.F for MDJWF:
1726      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1727        change rho -> rho-rhoConst
1728      - replace call find_rho to find_rhonum
1729    o initialisation of rFlx extended to full array (required by TAF)
1730      and shifted to thermodynamics
1731    o removed PTRACERS.h in ptracers routine
1732    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1733    o Correcting initialisations for fVerU, fVerV.
1734    o helping TAF to recognize dependency on kUp for
1735      fVerU, fVerV
1736    o Replacing delZ by delR in pkg/ctrl/
1737    checkpoint51o_pre
1738    
1739    o undid all of cp51 pending some cleanups and discussion
1740    o added the [#include "AD_CONFIG.h"] statement to all files that need
1741       it for adjoint/tl #defines
1742     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1743     o removed tools/genmake since it no longer works
1744    
1745    checkpoint51n_post
1746    o modifications to make FREEZE flux visible to pkg/kpp
1747      - moved surfaceTendencyTice from pkg/seaice to main code
1748      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1749      - subroutine FREEZE now limits only surface temperature
1750        (this means new output.txt for global_ocean.90x40x15,
1751         global_ocean.cs32x15, and global_with_exf)
1752    o added surface flux output variables to TIMEAVE_STATVARS
1753    
1754    checkpoint51n_pre
1755    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1756    o added [#include "AD_CONFIG.h"] to all files that use the following
1757      defines:
1758      - ALLOW_ADJOINT_RUN
1759      - ALLOW_TANGENTLINEAR_RUN
1760      - ALLOW_ECCO_OPTIMIZATION
1761    
1762    checkpoint51m_post
1763    o incorporating changes to get TAMC/TAF working in genmake2
1764      - added new TAMC/TAF targets to the Makefile
1765      - various cleanups related to package handling
1766      - these changes should have no impact on the forward model
1767    
1768    checkpoint51l_post
1769    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1770     - faster algorithm for cal_addtime.F
1771     - higher precision arithmetic, where needed
1772     - pkg/exf *startdate variables changed from calendar date to
1773       model integration time
1774    
1775    checkpoint51l_pre
1776    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1777    o enable to apply restoring on S & T only in a latitude band.
1778    o update output (external_forcing_surf modif. change truncation errors)
1779       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1780    
1781    checkpoint51k_post
1782    o change default to: useNHMTerms=.FALSE.
1783     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1784       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1785     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1786        exp1, ideal_2D_oce
1787     - change data file of oceanic exp (leave the results unchanged for now)
1788       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1789    o set gravitySign automatically according to the vertical coordinate used
1790      (and change sign: back to "logical" value: +1 when R increases downward)
1791    o added an include barrier to the default CPP_OPTIONS.h and
1792      removed the #include "PACKAGES_CONFIG.h" from it
1793    o fix a bug in mom_fluxform (from chk51j_post)
1794    
1795    checkpoint51j_post
1796    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1797    o adjusted some flow directives (dynamics, thermodynamics)
1798    o added cubed-sphere case to test cost function
1799    o heckpoint_lev?_directives.h now include
1800      pkg-specific directives, whenever those are enabled.
1801    o Moving pkg-specific flow directives to corresponding pkg
1802      Moving pkg-specific differentiation list to corresponding pkg
1803      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1804      ---> conventions are
1805           - pkg_ad.flow
1806           - pkg_ad_diff.list
1807           - pkg_ad_check_lev?_dir.h
1808    
1809    checkpoint51i_post
1810    o merge of the branch-genmake2
1811      - knowingly breaks the older genmake
1812      - automatic generation of all ALLOW_${PKG_NAME} defines
1813      - new testreport supersedes older testscript
1814    o large number of package inclusion and header cleanups
1815    checkpoint51i_pre
1816    
1817    o new output for adjoin of global ocean vector invariant
1818    o fix for checkpoint of thermodynamic seaice and bulk_force
1819    o Steph gchem various cleanups
1820    
1821    checkpoint 51h_pre
1822    o fixed some single quotes
1823    o modify gchem pkg to be more versatile
1824    o modifications to clean up dic pkg
1825    o add pkg/cfc
1826    
1827    checkpoint51g_post
1828    o provide links for ARPACK and ADM*TLM
1829    o start removing verification/vero/
1830    o update AD-related stuff
1831      (in particular some IF-statements in model/src/ routines)
1832    o adding to verification/global_ocean.90x40x15/ adjoint of
1833      vector invariant setup
1834    
1835    checkpoint51f_post
1836    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1837    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1838      of tracer Green's fucntions for ocean inversion project.
1839    
1840    checkpoint51f_pre
1841    o Added on-the-fly spatial interpolation capability
1842        "USE_EXF_INTERPOLATION" to pkg/exf.
1843      - This is a temporary Cartesian-grid hack until
1844        the super-duper ESMF coupler becomes available.
1845      - See verification/global_with_exf/README for usage example.
1846      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1847        flags and modified pkg/seaice accordingly.
1848    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1849        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1850        non-local transport term.
1851    
1852    checkpoint51e_post
1853    o pkg/mom_vecinv:
1854      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1855      - add time-ave diagnostic of vorticity advection.
1856    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1857    o atmospheric geopotential: - include water vapor effect;
1858                                - use p^kappa in p* scaling.
1859    o land pkg: read initial state from files.
1860    o AIM : add stratospheric drag in the upper level
1861    
1862    checkpoint51d_post
1863    o change function ILNBLNK (=> last non-blank char.) to return zero
1864      (instead of the string length) when the string. char is empty
1865    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1866    o modif's to restore TAMC compatibility
1867      - avoid "_d" constructs in PARAMETER declarations
1868      - avoid interrupting lines by comment lines
1869    o Use cluster local disks for purely local I/O
1870      vs. globally visible disks needed for ctrl stuff
1871      (merged from ecco-branch)
1872      - new active_file_loc... and mdsio_..._loc routines
1873      - affected packages: autodiff, ctrl, grdchk, mdsio
1874    
1875    checkpoint51c_post
1876    o introducing integer flag debugLevel
1877      - debLevZero: suppress all output
1878      - debLevA: standard
1879      - debLevB: equivalent to current debugMode=.TRUE.
1880    o introducing pathname variable mdsioLocalDir for mdsio
1881      that can be specified at runtime
1882      (relevant for cluster I/O to local disk)
1883    `
1884    >>>checkpoint51b_post
1885    adjoint of ptracers
1886    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1887    o extended state in checkpoint_lev?, etc.
1888    o alternative ctrl/cost with tr1 or ptracer
1889    o new comlev1_bibj_ptracers
1890    o new ptracers.flow
1891    o made ptracers_forcing same as external_forcing_s
1892    o added verification for adjoint with ptracers
1893      - adm. grdchk fail so far
1894      - tlm. grdchk OK
1895      - checked tapelev/comlev recomputations: OK
1896    <<<checkpoint51b_pre
1897    
1898    checkpoint51a_post
1899    o added code for biogeochemistry package
1900      - new pkgs: dic, gchem
1901      - new subroutine in ptracers
1902    o modify code for biogeo packages
1903      - in model/src and pkg/ptracers
1904    
1905    checkpoint51
1906    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1907      - autodiff, ctrl, exf, grdchk, seaice
1908      kept separate packages
1909      - cost, ecco, obcs
1910    o updating verification/internal_wave, verification/lab_sea
1911      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1912    
1913    checkpoint50i_post
1914    o Preparing next differentiable checkpoint and sync
1915      of MAIN vs. ecco-branch
1916      - 1st step: this one is differentiable
1917      - 2nd step: next(! not this) checkpoint will have updated packages
1918                  from ecco-branch)
1919    
1920    checkpoint50h_post
1921    o new package "land": provide surface BC for AIM.
1922    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1923    o AIM: use true log-P extrapolation for near surface temp (= as in
1924        F.Molteni paper) ; update aim.5l_cs output.
1925    o New variable in PARM03 for more flexible pickups
1926    o somewhat cleaned package initialisation sequence for
1927      ctrl/ cost/ ecco/ in packages_... routines
1928    
1929    checkpoint50g_post
1930    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1931      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1932      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1933        made the default because of faster convergence than ADI
1934    
1935    checkpoint50f_post
1936    o exf totally restructured
1937      - replaced all exf_set_ routines by one generic exf_set_gen.F
1938        and made sure it's still differentiable
1939      - split exf_getffields.F into new exf_bulkformulae.F
1940      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1941      - updated adjoint/makefile and relevant verif. accordingly
1942    
1943    checkpoint50f_pre
1944     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1945          + change Evap over land. (update aim.5l_cs output)
1946     o added missing .cvsignores and made uniform across expts
1947     o changed configuration of tidal_basin_2d expt
1948     o added pkg/debug functions for tracing code in fatal crashes
1949     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1950     o new fn in pkg/monitor to stop model if solution grows too big
1951     o removed lots of single quotes from comments
1952    
1953    checkpoint50e_post
1954    o make KPP work with PTRACERS
1955     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1956       nearly a copy of kpp_transport_s
1957     - there is no analogue to SurfaceTendencyS, so I have to use
1958       gPtr(of the surface layer) instead
1959    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1960    checkpoint50e_pre
1961    
1962    checkpoint50d_post
1963    o change kpp output from multiple-record state files to single-record state
1964      files analogous to write_state.F
1965    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1966      analogous to the cg2d-related output.
1967    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1968      so that writing to internal file fn (with length 512) fails.
1969    checkpoint50d_pre
1970    
1971    checkpoint50c_post
1972    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1973    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1974    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1975    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1976    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1977    
1978    checkpoint50c_pre
1979    Merging from release1_p13:
1980    o bug fix for pkg/seaice dynamic solver
1981    o Added SEAICE_initialHEFF to pkg/seaice
1982    
1983    checkpoint50b_post
1984    o store u*,v* in gU,V instead of in guNm1,gvNm1
1985    o in order to put the momForcing out of the Adams-Bashforth:
1986      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1987      to timestep.F
1988    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1989    o re-generate output for highly sensitive test-exp:
1990       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1991    
1992    checkpoint50b_pre
1993    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1994    o corrected CPP option mismatch in exf_Bulk... functions for case
1995      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1996    
1997    checkpoint50a_post
1998    o Bug fix for merging between c50 and KPP.
1999      ikey was passed from thermodynamics to kpp_calc via
2000      common block rather than being recomputed in kpp_calc,
2001      in contradiction with new key itdkey.
2002      New key ikppkey created, and tamc.h headers updated.
2003    
2004    checkpoint50
2005    - 2nd step of merge with ecco-branch:
2006      merge changes in ecco-branch back into main trunk
2007    - bug fix in find_alpha
2008    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2009    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2010    - merged some sliced AD support routines
2011    
2012    checkpoint49
2013    merged from ecco-branch:
2014    o exf:
2015      - Enable initialisation of forcing fields to constant
2016        (runtime) values.
2017      - in exf_getffields.F
2018        Reduce i-/j-loop to interior domain, discarding overlaps.
2019        That also fixes wrong TAF-key computations for key_1, key_2
2020        with bulf formulae.
2021      - exf_init.F modify #ifdef for exf_init_evap
2022      - exf_getffieldrec.F, ctrl_getrec.F
2023        The following INT-usages are not safe:
2024          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2025          fldcount = int(fldsecs/fldperiod) + 1
2026        and were modified.
2027    o autodiff: checkpoint_lev...
2028      - updated storing for bulk formulae (some arrays were missing)
2029      - added state for seaice package
2030      - synchronized with main branch
2031    o DIVA:
2032      Modif.s in
2033      - the_main_loop.F
2034      - the_model_main.F
2035      and added cost_final_restore.F cost_final_store.F
2036      o With these changes, it is possible to fully separate
2037        the first forward run to compute the cost function (mdthe_main_loop)
2038        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2039        into separate model executions.
2040        This enables better tuning of DIVA to given queue sizes.
2041      o Loss of cost function value in consecutive DIVA runs is
2042        fixed by storing to 'costfinal' file.
2043      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2044        beginning/end of adjoint integration is accounted for.
2045      The current changes apply to TAF-1.4.26.
2046      TAF has one remaining bug, requiring one manual change
2047      (see MITgcm manual).
2048    o cal: synchronized between MAIN and ecco-branch
2049    
2050    checkpoint48i_post
2051    o Changes to restore differentiability of code w.r.t. previous tag
2052      (mostly adding new routines to make list and replacing
2053      pressure by totPhiHyd).
2054    o Updated and merged grdchk package
2055      - has both ADM and TLM checks
2056      - works for single- and multi-proc.
2057      - output cleaned
2058      - worked successfully for parallel DIVA
2059    o genmake:
2060      - Adding -platform=SP4
2061      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2062    o Modif. for DIVA:
2063      ctrl_unpack should not be called in intermediate DIVA interval.
2064      (similar thing would apply for active files such as
2065      tbar, sbar, psbar, which should not be reinitialised;
2066      only relevant for ecco-branch)
2067    
2068    checkpoint48h_post
2069    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2070    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2071    o Added SEAICE_initialHEFF to pkg/seaice
2072    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2073    
2074    checkpoint48g_post
2075    --- EOS:
2076    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2077      store total Potential in totPhyHyd for diagnostics & EOS.
2078    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2079    --- Pressure/geopotential gradient:
2080    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2081    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2082      ( changes results of global_ocean_pressure )
2083    o NLFS + z-coord.: add eta*Rho' contribution.
2084    o accurate phiHyd when using interface-W at the middle between 2 centers
2085     ( changes results of ideal_2D_oce )
2086    o includes r* 2nd term in potential gradient.
2087    
2088    checkpoint48f_post
2089    Merging from release1_p12:
2090    o Modifications for using pkg/exf with pkg/seaice
2091      - improved description of the various forcing configurations
2092      - added basic radiation bulk formulae to pkg/exf
2093      - units/sign fix for evap computation in exf_getffields.F
2094      - updated verification/global_with_exf/results/output.txt
2095    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2096      (SBO) core products, including oceanic mass, center-of-mass,
2097      angular, and bottom pressure (see pkg/sbo/README.sbo).
2098    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2099      to avoid negative values in shallow regions.
2100      - updated verification/natl_box/results/output.txt
2101      - updated verification/lab_sea/results/output.txt
2102    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2103    o Added useSingleCpuIO option (see PARAMS.h).
2104    o Updated useSingleCpuIO option in mdsio_writefield.F to
2105      work with multi-field files, e.g., for single-file pickup.
2106    o pkg/seaice:
2107      - bug fix in growth.F: QNET for no shortwave case
2108      - added HeffFile for specifying initial sea-ice thickness
2109      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2110    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2111      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2112    o pkg/seaice:
2113      - adjoint-friendly modifications
2114      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2115    
2116    checkpoint48e_post
2117    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2118    o dynamics: change definition of computational domain & adapt mom_fluxform
2119      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2120    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2121        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2122        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2123        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2124        inverted_barometer solid-body.cs-32x32x1
2125      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2126    
2127    checkpoint48d_post
2128    o in preparation for r*:
2129     a) use pre-computed gradient of hydrostatic potential:
2130        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2131     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2132        => affects results of glob_oce_pressure (different truncation error)  
2133      update output.txt of ideal_2D_oce & global_ocean_pressure
2134    
2135    checkpoint48d_pre
2136    o in preparation for r*:
2137      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2138      pass the 2 comp. of the grad. as arguments to momentum S/R.
2139      but for the moment, only used if it does not change the results.
2140    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2141    
2142    checkpoint48c_post
2143    Modifications in treatment of initial flux forcing controls
2144    to avoid extra storing of flux fields.
2145    
2146    checkpoint48c_pre
2147    o Added tidal_basin_2d experiment (currently 1D!)
2148    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2149    
2150    checkpoint48b_post
2151    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2152     (modification to pressure gradient not yet implemented)
2153    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2154      (for U & V) that are used for vertical advection of momentum.
2155    
2156    checkpoint48a_post
2157    o In preparation for r*, use temp. array to compute vertical transport
2158       in flux-form momentum pkg. => change results of few test-exp.
2159      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2160                        lab_sea, natl_box & plume_on_slope
2161    
2162    checkpoint48
2163    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2164    
2165    checkpoint47j_post
2166    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2167    o moved adexch from forward_step to addummy_in_stepping
2168    o added exch in ctrl_map_...
2169    o aveFreq.=0. at end of cost_final to avoid overwrite in
2170      reverse checkpointing loop
2171    o Yet more changes in gmredi:
2172      * adgmredi_calc_tensor
2173        avoiding all recomputation of gmredi_slope_limit
2174      * adgmredi_x/y/rtransport
2175        added flag for excessive storing to avoid recomp. of
2176        u/v/rtans, dTdx/y/z
2177        -> this is not really necessary and very memory-consuming
2178      * adgmredi_slope_psi:
2179        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2180      * gmredi_slope_limit
2181        re-activated full calculation of taperfct for case 'ac02'
2182    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2183    
2184    checkpoint47i_post
2185    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2186    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2187      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2188    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2189    o gmredi: fix few bugs.
2190    
2191    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2192    This will be a good checkpoint to plug into the ecco-branch.
2193    o few modif.'s to get latest version adjointed
2194      (mainly kick out code in ini_linear_phisurf)
2195    o modif's to run adjoint with exactConserv
2196    o case GM_BOLUS_ADVEC should be cleaned
2197      S/R gmredi_slope_psi should be cleaned
2198    o verification/carbon now has exactConserv=.TRUE.
2199    
2200    checkpoint47g_post
2201    o time-average AIM output: becomes independent from statvars time-average
2202      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2203    o After TAF bug fix:
2204      Tested adjoint of gmredi package.
2205      Tests were done with checkpoint47 rather than with latest
2206      checkpoint47f_post since the latter is broken for the adjoint
2207      verification/carbon/ contains both ADM and TLM gradient checks.
2208    Here they are, before they get changed/lost/stolen.
2209    Mostly modif.'s to fix numerical sensitivities.
2210    Gradient checks OK for
2211    - GM_taper_scheme:
2212      * clipping
2213      * ac02
2214      * linear
2215      * glw91
2216      * dm95
2217      * ldd97
2218    - GMREDI_OPTIONS:
2219      * GM_VISBECK_VARIABLE_K
2220      * GM_NON_UNITY_DIAGONAL
2221      * GM_EXTRA_DIAGONAL
2222      * GM_BOLUS_ADVEC
2223    in conjunction with data.gmredi parameters to be checked in
2224    in a few minutes under verification/carbon/code/
2225    
2226    checkpoint47f_post
2227    Merging from release1_p10:
2228    o modifications for using pkg/exf with pkg/seaice
2229      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2230        and SEAICE_EXTERNAL_FLUXES
2231      - pkg/exf CPP options EXF_READ_EVAP and
2232        EXF_NO_BULK_COMPUTATIONS
2233      - usage examples are Experiments 8 and 9 in
2234        verification/lab_sea/README
2235      - verification/lab_sea default experiment now uses
2236        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2237    
2238    checkpoint47e_post
2239    o created a tag prior to creating a branch
2240    
2241    checkpoint47d_post
2242    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2243      at the bottom boundary had an erroneous half slip boundary condition
2244    o added bottom drag and no slip boundary condition capabilities to
2245      oceanic pressure coordinates code
2246    o added new verification experiment global_ocean_pressure, this experiment is
2247      also described in the tutorial section of the manual
2248    checkpoint47d_pre
2249    
2250    checkpoint47c_post
2251    o Added a verification experiment for a global cubed-sphere ocean run
2252      -  verification/global_ocean.cubed32x32x30
2253      -  uses pkg/therm_seaice and pkg/bulk_forcing
2254    
2255    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2256    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2257      when using P-coordinate; only implemented for atmospheric config.
2258    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2259      NOTES: requires option NONLIN_FRSURF to be "#define".
2260    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2261    
2262    checkpoint47b_post
2263    Merging from release1_p9:
2264    o pkg/seaice
2265      - removed GOTO's and added taf directives
2266      - double precision constants to reduce the g77 (Linux)
2267        to F77 (SGI) differences reported in release1_p8
2268    o tools/genmake
2269      - added SGI options
2270    o verification/testscript
2271      - updated to that of checkpoint47a_post
2272    o verification/global_ocean.90x40x15/input/eedata
2273      - modified for SGI f77 compatibility
2274    o verification/lab_sea
2275      - added description of sea-ice model
2276      - added missing matlab routines
2277      - added test of thermodynamics parallelization
2278    
2279    checkpoint47a_post
2280    o new pkg: aim_v23
2281     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2282       for now, keep the same surface forcing as before.
2283     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2284     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2285     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2286    o add diagnostic of surface correction term in monitor output
2287    
2288    o bulk_force and therm_seaice
2289    - Two packages:  bulk_force (Bulk forcing)
2290      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2291    - Earlier integration from Stephaine Dutkiewicz
2292      and Patrick Heimbach.
2293    - Two ifdef statements for compile time,
2294       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2295    
2296    checkpoint47
2297    differentiable version of checkpoint46n_post
2298    o bug fix in quasihydrostaticterms
2299    o * "clean" adjoint code (in terms of extensive recomputations)
2300        can now be obtained for all GMREDI options (i.e. for
2301        - GM_VISBECK_VARIABLE_K
2302        - GM_NON_UNITY_DIAGONAL
2303        - GM_EXTRA_DIAGONAL
2304        - GM_BOLUS_ADVEC )
2305      * However, wrong gradient check problem remains unsolved.
2306      * New CPP options have been introduced for different
2307        tapering schemes
2308    o external_fields_load now part of differentiation list
2309    o pressure needs multiple storing;
2310      would be nice to have store_pressure at beginning or
2311      end of forward_step, e.g. by having phiHyd global (5-dim.)
2312      (NB: pressure is needed for certain cases in find_rho,
2313      which is also invoked through convective_adjustment).
2314    o recomputations in find_rho for cases
2315     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2316    o #define ATMOSPHERIC_LOADING should be differentiable
2317    o ini_forcing shifted to begining of initialise_varia
2318    o Incorporating QNVS line search routines into MITgcm
2319      (this is separate code, and therefore not under pkg)
2320      lsopt/, optim/
2321    o Updated verification/carbon/
2322      - #define GM_VISBECK_VARIABLE_K
2323      - GM_taper_scheme    = 'ldd97'    
2324    
2325    checkpoint46n_post
2326    Merging from release1_p8:
2327    o verification/natl_box:
2328      updating new external_fields_load routine
2329    o New package: pkg/seaice
2330      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2331      The sea-ice code is based on Hibler (1979-1980).
2332      Two sea-ice dynamic solvers, ADI and LSR, are included.
2333      In addition to computing prognostic sea-ice variables and diagnosing
2334      the forcing/external data fields that drive the ocean model,
2335      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2336      The implied surface heat flux is then stored in variable
2337      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2338      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2339      non-local transport term.  Because this call precedes model
2340      thermodynamics, temperature under sea-ice may not be "exactly" at
2341      the freezing point by the time theta is dumped or time-averaged.
2342      N.B.: fairly large differences in accuracy occur across
2343            different platforms/compilers; comparison between
2344            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2345            generated output gives:
2346       T           S           U           V
2347      C D M    c        m  s        m  s        m  s        m  s
2348      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2349      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2350      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2351    
2352      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2353    o GAD:
2354      - generated new common blocks to account for call of
2355        same gad routines with differing traceridentities
2356        (needed to modify tracerIdentity indices in GAD.h)
2357      - generated separate common blocks for case useCubedSphereExchange
2358        (Department of Futurology)
2359      - parameter lists to gmredi_?transport: added tracerIdentity
2360      - added new key indices to tamc.h
2361    o external_fields_load:
2362      - added this routine to TAF list
2363      - needed to make some common blocks global and additional storing
2364        along the same lines as exf package (checkpoint_lev?_directives.h)
2365    o exf:
2366      updated external forcing package
2367      - bug fixes carried over from ecco-branch
2368        (missing OBCS_OPTIONS.h in two routines)
2369      - enable easy to use "no forcing".
2370      - added exf I/O for atmospheric loading
2371      - added exf I/O for runoff data
2372      - transfered scaling between exf <-> MITgcm to exf namelist
2373    o Adding new verification experiment global_with_exf.
2374      This verification experiment is almost identical to the
2375      global_ocean.90x40x15 experiment, except that it uses
2376      the exf (and cal) package instead of the
2377      external_fields_load routine (cf README file).
2378    
2379    checkpoint46m_post
2380    o modified testscript to return -- when there are no lines of "%MON" output
2381    o added new flag "quasiHydrostatic" for QH mode
2382      and new routine quasihydrostaticterms()
2383    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2384      New routine: mom_u_coriolis_nh()
2385    o fixed sign of non-hydrostatic metric terms in u and v equations.
2386      Depend on correct sign of gravitySign.
2387    o added work.pc* to .cvsignore in aim directories using ifc
2388    o introduced flag for controllin non-hydrostatic metric terms
2389    o removed gravitySign from PARM04
2390    o switched to g77/ifc from pgf77 in aim experiments
2391    
2392    checkpoint46l_post
2393    o made convective adjustment work with pressure coordinates:
2394     - changed the direction of k-loop in convective_adjustment.F for the
2395       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2396     - adjusted the reference pressure k-index in convective_adjustment.F
2397     - adjusted the convection condition in convect.F (in analogy to
2398       calc_ivdc.F)
2399     - convective_adjustment no longer computes anything on the halos
2400     - removed the warnings about negative salinity from find_rho.F and
2401       find_alpha.F; instead the new routine look_for_neg_salinity, called
2402       at the beginning of find_rho, find_alpha, and find_beta, does a
2403       check of the entire slice, if CPP-option
2404       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2405    checkpoint46l_pre
2406    
2407    checkpoint46k_post
2408    o fixed the verification/global_ocean.90x40x15 experiment:
2409     - new bathymetry (the world according to A., JMC, and M.)
2410     - new initial fields and forcing fields (*.bin files)
2411     - new POLY3.COEFFS (for the next release one should switch to a full
2412       equation of state: JMD95P or MDJWF)
2413     - fixed several errors and redundancies in the data file
2414     - experiment uses looped cells
2415     - added matlab directory with diagnostic scripts for plotting of output
2416    
2417    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2418     - read AIM physics parameters from a file (data.aimphys)
2419     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2420    
2421    checkpoint46j_post
2422    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2423    o move wVel computation at the end of the time step, in S/R integr_continuity
2424    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2425    o update timeave pkg for wVel diagnostic.
2426    checkpoint46j_pre
2427    
2428    checkpoint46i_post
2429    o Clean up AIM package (and keep the results unchanged):
2430      include CPP_OPTION and use IMPLICT NONE in all routines ;
2431      declare all the variables _RL ; use _d 0 for all numerical constants.
2432      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2433    
2434    checkpoint46h_post
2435    o cleaned up the use of rhoNil and rhoConst.
2436      - rhoNil should only appear in the LINEAR equation of state, everywhere
2437        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2438        and the dynamical equations are all divided by rhoConst
2439    o introduced new parameter rhoConstFresh, a reference density of fresh
2440      water, to remove the fresh water flux's dependence on rhoNil. The default
2441      value is 999.8 kg/m^3
2442    o cleanup up external_forcing.F and external_forcing_surf.F
2443      - can now be used by both OCEANIC and OCEANICP
2444    checkpoint46h_pre
2445    
2446     Added code to convert surface volume flux (fresh water) into
2447     a mass flux when using P coordinates in the ocean (OCEANICP).
2448     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2449    
2450    checkpoint46g_post
2451    o Include a new diagnostic variable phiHydLow for the ocean model
2452      - in z-coordinates, it is the bottom pressure anomaly
2453      - in p-coordinates, it is the sea surface elevation
2454      - in both cases, these variable have global drift, reflecting the mass
2455        drift in z-coordinates and the volume drift in p-coordinates
2456      - included time averaging for phiHydLow, be aware of the drift!
2457    o depth-dependent computation of Bo_surf for pressure coordinates
2458      in the ocean (buoyancyRelation='OCEANICP')
2459      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2460        Theta, Salinity, and Pressure in the parameter list. This routine is
2461        presently contained in find_rho.F. This routine does not give the
2462        correct density for 'POLY3', which would be a z-dependent reference
2463        density.
2464    o cleaned up find_rho
2465      - removed obsolete 'eqn' from the parameter list.
2466    o added two new verification experiments: gop and goz
2467      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2468    checkpoint46g_pre
2469    
2470    checkpoint46f_post
2471    o Enable tangent linear (forward mode) gradient checks:
2472      - extended active file handling to g_... files
2473      - added TANGENT_SIMULATION to theSimulationMode
2474      - extended grdchk package accordingly
2475    o added tangent linear setup in verification/carbon/code_ftl
2476    o added adjoint setup in verification/front_relax/code_ad
2477    
2478    checkpoint46e_post
2479    o Added new equation of state -> MDJWF
2480      - EOS of McDougall et al., 2002, JAOT, submitted
2481      - caveat: the equation of state is only valid for a smaller (more
2482        realistic?) range of values than JMD95P/Z and UNESCO
2483      - added masks to the calculation of pressure in store_pressure
2484      - added more check values for density in check_eos (ini_eos.F), some of
2485        the old check values are out of the range of the MDJWF-eos, so don't
2486        expect perfect matches for those
2487    checkpoint46e_pre
2488    
2489    checkpoint46d_post
2490    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2491      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2492      case of pressure coordinates. eosType='JMD95Z' in
2493      combination with buoyancyRelation='OCEANICP' now causes an error.
2494    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2495      in find_alpha/beta.
2496    checkpoint46d_pre
2497    
2498    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2499      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2500    
2501    checkpoint46c_post
2502    o Changes necessary for ocean in p-coordinates
2503     -  Added new buoyancy relation = 'OCEANICP'
2504     -  Added new parameters = gravitySign (this used to be contained inside
2505        the factor dRdZ which I added when we first switched to R coordinates).
2506     X GM/Redi is not compatible (yet)
2507     X bottom drag and no-slip need to be debugged.
2508    checkpoint46c_pre
2509    
2510    checkpoint46b_post
2511    o Added new equation of state -> JMD95Z and JMD95P
2512      - EOS of Jackett and McDougall, 1995, JAOT
2513      - moved all EOS parameters into EOS.h
2514      - new routines ini_eos.F, store_pressure.F
2515    o Added UNESCO EOS, but not recommended because it requires
2516      in-situ temperature (see JMD95)
2517    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2518      unesco.f to be used with POLY3
2519    checkpoint46b_pre
2520    
2521    checkpoint46a_post
2522    o Added (atmospheric) pressure loading
2523      - new field in FFIELDS.h, etc...
2524      - new cpp flag ATMOSPHERIC_LOADING
2525    o Changed hFacC to _hFacC in calc_phi_hyd.F
2526    o Added SHORTWAVE_HEATING to some files for consistency
2527    checkpoint46a_pre
2528    
2529    checkpoint46
2530    further merges from release1_p5
2531    o new ctrl package
2532      - adopted from ECCO environment to enable optimization
2533      - added Eliassen Palm fluxes to controls
2534    o added Eliassen Palm flux controls to gradient check package
2535    o cost package
2536      - Compatible with new ctrl package
2537      - added Eliassen Palm cost hooks
2538      - modif's of existing cost functions
2539    o Adjoint-related bug fixes in kpp:
2540      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2541      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2542    o autodiff package
2543      - flow directives:
2544        + new for S/R do_the_model_io
2545        + enhanced for S/R checkpoint
2546        + new gmredi.flow
2547      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2548        disable adcommon.h/g_common.h by default.
2549      - fixed problem for adjoint of global_max
2550    o modified verification/carbon/
2551    o New setup for adjoint of global_ocean
2552    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2553    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2554    o incorporated hooks for sponge layer code (external_forcing.F)
2555    
2556    checkpoint45d_post
2557    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2558    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2559      (affects plume_on_slope "cg2d" output)
2560    o add new parameter deltaTfreesurf for free-surface time stepping
2561    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2562    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2563    o change phiMin in exp1 (to agree with documentation)
2564    o add new flags:
2565     - T,S forcing inside/outside Adams-Bashforth
2566     - turn off temp,salt advection and/or forcing
2567     - for each tracer, define internal flag for multiDimAdvection & A-B
2568    o monitor: change definition of KE to check conservation of Energy
2569    
2570    checkpoint45c_post
2571    o Removed f90 comments ("!")
2572    o Modified initialisations to enable exf package for MITgcm
2573      (without invoking ECCO_PACKAGE).
2574    o modifications to gradient check package (Martin Losch)
2575      - enable centered differences
2576      - modified format of standard output
2577    
2578    checkpoint45b_post
2579    o cleaned exchange calls in cg2d
2580    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2581    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2582      to configure barotropic setup (Martin Losch)
2583    o moved some initialisations within bi,bj loop in dynamics
2584      (TAF flow dependency)
2585    o in initialise_varia, moved call packages_init_variables
2586      before convective_adjustment_init
2587      (corresponding adjustment of TAF tape initialisation).
2588    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2589    
2590    checkpoint45a_post
2591    o compute Rho over the whole domain (extend iMin,jMin indices)
2592    o specific exchange for X-slice domain (case Ny=1)
2593    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2594    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2595    
2596    checkpoint44h_post = checkpoint45
2597    o Fix to restore differentiability:
2598      place at which packages_init_variables is called in
2599      initialise_varia is crucial for reverse control flow.
2600    o modifications in GMRedi to enable stable adjoint
2601      (corresponding modif's in thermodynamics, dynamics)
2602    o added missing hook for sponge layer code in external_forcing
2603    o modified test cost functions
2604    o storing in gad_advection (plus removal of write(0,*)!
2605    o missing headers TR1.h added in convective_adjustment routines
2606    o errorMessageUnit set non-equal zero in eeboot
2607      (conflict on some platforms, e.g. IBM SP3)
2608    o modified carbon verif.
2609    
2610    checkpoint44h_pre
2611    o vertical grid option: allow to put the Interface at the middle between
2612      2 cell-centers ; replace delZ in pkg/kpp by drF.
2613    o GM Advective form: Tracers are advected using the residual transport (=
2614      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2615    
2616    checkpoint44g_post
2617    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2618      results) ; ifdef missing in thermodynamics.F
2619    
2620    checkpoint44f_pre,checkpoint44f_post
2621    o added PTRACERS package
2622      This allows an arbitrary number of passive tracers to be integrated
2623      forward simultaneously with the dynamicaly model.
2624      + Implemented so far:
2625        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2626        - I/O and checkpointing
2627        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2628      + Not implemented so far:
2629        - KPP
2630        - OBCS
2631      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2632        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2633        line in data.pkg.
2634      + This package is disabled by default since it increases storage.
2635    
2636    
2637    o testscript: added -cleanup option
2638    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2639                 b) enable to filter 2D fields.
2640    
2641    checkpoint44e_pre,post
2642    o re-wrote convective adjustment to use pre-calculated weights
2643      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2644      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2645      Original calls to convect() still in place.
2646    
2647    chkpt44d_pre,post
2648    o added missing EXCLUDE_MONITOR flags
2649    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2650      (incompatible typ in MIN/MAX expressions caused problems
2651      on IBM SP3)
2652    o in genmake added variable MAKEDEPEND
2653      plus resetting for case SunOS
2654    o added timer_stats.c routine for IBM SP3
2655    o removed variables in dynamics
2656    !!! I forgot to create tag chkpt44d_pre !!!
2657    !!! But chkpt44d_pre = chkpt44c_post    !!!
2658    
2659    o real fresh water flux implemented with non-linear free-surface.
2660    
2661    chkpt44c_pre,post
2662    o few fix (mask in shap_s2, EmPmR in external_field_load,
2663      USE_NATURAL_BCS in solve_for_P);
2664    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2665    
2666    checkpoint44b_pre/_post
2667    o merge of relevant stuff from the ecco-branch:
2668      - genmake: removed $S64 overwrite for case SunOS
2669      - pkg/exf: update and corrections for field swapping and obcs
2670      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2671                  harmonized between ECCO and MITgcm
2672      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2673                      updated checkpointing_lev... lists for obcs
2674      - model/src: minor changes in forward_step, plot_field
2675                   added directive for divided adjoint in the_main_loop
2676      - pkg/mdsio: added mdsio_gl_slice
2677    
2678    o check parameters & config (chkpt44a_pre,post)
2679    o OBC and NonLin_FrSurf.
2680    
2681    checkpoint44
2682    o fix bug in mom_vi_del2uv
2683    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2684    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2685    o update AIM experiments (NCEP input files)
2686    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2687    o added some stuff for AD
2688    
2689    checkpoint43
2690    o added two new advection tests
2691    o added global 4x4 degree ocean test
2692    o added test of H&S94 with free surface on cube
2693    o some final mods for gradient check, adjoint,...
2694    
2695    checkpoint42
2696      Fixed AD-related problems:
2697    o Store directives up-to-date with re-arranged Adams-Bashforth
2698      (mainly thermodynamics.F)
2699    o New store directives for multi-dim. advection schemes
2700      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2701      * new common block and key passkey
2702      (mainly gad_advection.F)
2703    o Modified store directives for split of dynamics/thermodynamics
2704      for the case ALLOW_KPP
2705    o Cleaned argument list for timestep_tracer.F
2706    
2707    checkpoint41
2708    o re-formatted/added comments in prologues of key subroutines
2709      to work with protex
2710    
2711    checkpoint40
2712    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2713    o added FLT (floats) package from Arne along with demo. experiment
2714    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2715      implementation of forward-in-time forcing terms
2716    o more mods for non-linear free-surface including new variable
2717    o modified multi-dim method to work on cube
2718    o bug fix in KPP (from DM)
2719    
2720    checkpoint40pre9
2721    o added DST advection schemes
2722    o fix MPI bug on SGI's
2723    o modifications for non-linear free-surface
2724    o fixed conditionals for fixed flow/passive tracer only mode
2725    o added tension/strain form of stress tensor
2726    o changes to commenting of arguments for TAF/TAMC
2727    o added/updated many matlab scripts
2728    o added multi-dimensional advection method for tracers
2729      
2730    checkpoint40pre8
2731    o new package rw/
2732      Added method for dumping intermediate local arrays:
2733      mdsio_writetile - same as mdsio_writefield except works from inside
2734                        bi,bj loop
2735      mdsio_writelocal - same as mdsio_writetile except works for local
2736                         arrays
2737      write_local_r? - higher-level wrapper for mdsio_writelocal
2738      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2739      Example given at end of mom_vecinv.F that dumps some local arrays.
2740    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2741      control flux-form versus vector invariant code.
2742      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2743      or genmake -DISABLE ...
2744    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2745      (additional storing is now needed for case vecinv;
2746      currently nothing implemented to switch this storing off
2747      in case fluxform is used since no CPP flag available).
2748    
2749    checkpoint40pre7
2750    o bug fix in dynamics.F
2751      calc_viscosity called before k=1,Nr loop.
2752    o added some #ifdef's ALLOW_PASSIVE_TRACER
2753    o cleaned initialisations in ctrl_map_ini
2754      related to TAF
2755    
2756    checkpoint40pre6
2757    o split dynamics into thermodynamics & dynamics
2758    o corresponding split of calc_diffusivity into
2759      calc_diffusivity, calc_viscosity
2760      (kpp_calc_diff, kpp_calc_visc).
2761    o Added diffkr, kapgm to control variables
2762    o bug fix in gmredi_slope_limit for ldd97
2763    
2764    checkpoint40pre5
2765    o proper initialization of Adams-Bashforth time stepping
2766      + uses forward step for very first step of model (iter=0)
2767    o re-generated *all* output since almost all output is modified by this
2768      change (sorry but we've been putting this one off for about 2 years)
2769      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2770        *not* regenerated since they are already out of date and I don't
2771        want to create the impression that they are suddenly working.
2772    o removed KAP stuff for DEC's
2773    o modified/added many .cvsignore files in */code and */input
2774    o added new expt "solid-body.cs-32x32x1"
2775      + this uses an alternative form of ini_curvilinear_grid.F which
2776        is not necessarily any better than the current one...
2777    
2778    checkpoint40pre4
2779    o added re-initialisations of utrans,vtrans,rtrans in
2780      calc_common_factors which are crucial for TAF.
2781    o extended iMin,jMin range for calc_common_factors,
2782      calc_diffusivity
2783    o added option ALLOW_PASSIVE_TRACER
2784    o a few minor updates and fixes
2785    
2786    checkpoint40pre3
2787    o created calc_gtr1.F for gad package
2788    o split the_main_loop and re-introduced forward_step
2789    o some recomputations of nIter0 for TAMC
2790    
2791    checkpoint40pre2
2792    o Updated to latest branch of AJA, JMC
2793    o Added gradient check package
2794    o Added routines for passive tracer handling
2795    o Added carbon sequestration sensitivity experiment
2796    
2797    checkpoint39
2798     o Modifications and fixes to support TAMC
2799       (mainly missing or wrong directives)
2800     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2801       in addummy_in_stepping
2802     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2803     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2804     o Included following packages:
2805       cal: calendar
2806       exf: external forcing
2807       ecco: essential routines to control use of cal, exf
2808             (NB: this is not the full ECCO environment)
2809     o disabled some packages by default in genmake
2810    
2811    checkpoint38
2812     o see notes_c37_adj.txt
2813     o corrected wrong layer index in external_forcing_t
2814     o replaced the_main_loop/forward_step by the_main_loop
2815     o removed forceoutput from write_state
2816       (replaced criteria for initial/final state)
2817     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2818    
2819    checkpoint37
2820     o mdsio.F routine split and packaged in pkg/mdsio
2821       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2822        used unless genmake -disable=mdsio)
2823     o allow a more precise surface-geopotential gradient for the atmosphere
2824       taking into account the change in space of Alpha (=1/rho) at the surface.
2825     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2826       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2827     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2828       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2829       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2830     o Time-Average diagnostics defined as a pseudo package "timeave".
2831     o pickup files : old pickup (before c35) did not work with new code (c35
2832       and after) unless activating 2 commented lines in initialise-varia.
2833     o Non-Hydrostatic pickup file Pb fixed.
2834     o bug with Rigid-lid version (since c35) fixed.  
2835    
2836    checkpoint36
2837     o implement Crank-Nickelson barotropic time-stepping
2838     o recover Time-Average diagnostics
2839     o fix Pb in checkpoint (PR#19)
2840     o AIM become a standard package ; clean unused CPP_kees
2841    
2842    checkpoint35
2843     o subtantial rewrite of dynamics.f
2844     o allows staggered time-stepping
2845     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2846     o added bottom drag (linear + quadratic)
2847    
2848    checkpoint34
2849     o Modified exchange routines for correct reverse simulation.
2850     o Added verification output to comply with bug fix in impldiff.F
2851       as of c33 (exp2, natl_box).
2852     o Corrected store directives in dynamics.F
2853     o Corrected array boundaries in impldiff.F
2854     o Corrected array dimensions in gmredi.
2855       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2856     o Added routine GLOBAL_SUM_INT to global_sum.F
2857     o Added mdsio_gl.F for ECCO purposes.
2858    
2859  checkpoint33  checkpoint33
2860   o Fixed bug in lower BC in impldiff.F   o Fixed bug in lower BC in impldiff.F
2861   o Fixed confusion about units of forcing arrays in FFIELDS.h   o Fixed confusion about units of forcing arrays in FFIELDS.h

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