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revision 1.14 by cnh, Tue Sep 29 18:57:53 1998 UTC revision 1.698 by jmc, Wed Jul 12 14:29:07 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 calc_gw: true flux-form, account for horizontal grid spacing.
8      update rotating_tank results, but not plume_on_slope (affected at
9      truncation level, 11 digits).
10    
11    checkpoint58l_post
12    o calc_gw:
13     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
14     - remove side-drag for now (need to fix it); update plume_on_slope results.
15     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
16    o commit code to make SST/SSS weights spatially variable
17      (based on either variable in-situ or variable initial T/S weights)
18    o pkg/ecco:
19      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
20        now based on horizontally varying weights wthetaLev, wsaltLev
21      * cost_averagesflags now returns year indices in addition to day, month
22      * sflux balance is performed on annual basis
23        (sflxumm, sfluxmm2, bal_sfluxmm)
24      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
25        including separate counting and multipliers
26    o pkg/rbcs
27      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
28    
29    checkpoint58k_post
30    o testreport:
31     - always build in dir. "build" (if not there, mkdir build instead of building
32       & running in input)
33     - run in dir run (if it exists), in build otherwise.
34     - call prepare_run (if input/prepare_run exists)
35     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
36    o pkg/exf modifications to interpolation and rotation routines for more
37       reasonable treatment of North Pole singularity: for tracers North Pole
38       value is set to northernmost zonal-mean value, for zonal velocity it is
39       set to zero, and for meridional velocity it is set to northernmost value.
40    o pkg/exf/exf_check_range.F
41     - add tile index to diagnostics and move stop statement to the very
42       end of the routine.
43    o pkg/diagnostics: (diagnostics_main_init.F)
44      define title of isomorphic variables according to the current config.
45    o pkg/thsice with pkg/seaice dynamics:
46    - fix domain of computation (interior only, required for exf) and do exchanges
47    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
48    o towards a standard way of dealing with multi-threading in MONITOR
49      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
50    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
51       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
52    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
53    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
54    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
55       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
56    o tracer advection:
57     - clean-up and simplify calc_common_factors.F
58     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
59       advection subroutine (but still not used within DST advection S/R)
60    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
61    
62    checkpoint58j_post
63    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
64      from file (collects calls previously in FORWARD_STEP)
65    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
66    o adjoint store dir. adjusted accordingly
67    o genmake2
68      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
69    
70    checkpoint58i_post
71    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
72      on wind stress (SEAICEstressFactor defaults to 1.)
73    o Total number of Timers is finite (<=40): comment out 2 non-essential one
74      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
75    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
76      on CS-grid: no longer loosing mass.
77    o exf & curvilinear-grid: no longer modify longitude xC & xG.
78    o pkg/ggl90: fix sloppy output and fix a bug
79    o pkg/seaice: added SEAICEuseEVPpickup parameter
80      - Set to false in order to start EVP solver with
81        non-EVP pickup files when using SEAICEuseEVP
82      - fix sign error in diffusion in seaice_calc_rhs
83    
84    checkpoint58h_post
85    * Modifications for bottom topography control
86      o replace hFacC by _hFacC at various places
87      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
88      o add non-self-adjoint cg2d_nsa
89      o update autodiff support routines
90      o re-initialise hfac after ctrl_depth_ini
91      o works for 5x5 box, doesnt work for global_ocean.90x40x15
92    * Adding verification for 5x5 box (4-layer) bottom topography control
93    
94    checkpoint58g_post
95    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
96       used for mean seasonal cycle, mean diurnal cycle); add an example
97       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
98    o pkg/ggl90:
99      - add parameter (minimum surface kinetic energy)
100      - fix bug (avoiding division by zero)
101    o couple pkg/thsice to pkg/seaice:
102      - modify advection in seaice to accomodate new scalar fields to be advected
103      - only muliDimAdection scheme work with seaice/thsice
104      - mapping of thsice-variables to seaice-variables, back and forth
105      - does not break the verification experiments, but does not give the
106        desired results either
107    o pkg/seaice
108      - make (default) second order advection a bit less confusing?
109    
110    checkpoint58f_post
111    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
112      to pkg/seaice):
113      - new routines thsice_map_exf and thsice_get_exf provide the interface
114      - add an additional formal parameter to thsice_solve4temp
115    o pkg/exf:
116      - add new fields wspeed, snowprecip (to be able to couple to thsice)
117      - correct Stefan-Boltzmann constant
118      - new parameter for longwave surface emittance
119      - separate some stuff from exf_bulkformulae into new routines  
120        exf_radiation, exf_wind
121      - add new parameters and constants: longwave emissivity for ocean, ice
122        and snow, evaporation parameters over ice
123      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
124        either wind from stress or stress from wind
125    o pkg/thSIce:
126    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
127    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
128       and THSICE_CALC_THICKN
129    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
130    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
131      to make debugging easier.
132    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
133    o pkg/bulk_force:
134      - clean-up comments and parameters ;
135      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
136    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
137      generate new output for test-experiment: aim.5l_cs.thSI
138    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
139      testreport accordingly
140    
141    checkpoint58e_post
142    o SEAICE_CGRID adjoint done
143    o R_STAR adjoint implemented.
144      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
145      * need to sort out init. of h0facc, etc.
146    o Make pkg/profile fully independent of ecco,cost, etc. stuff
147      to be able to use it in pure forward.
148    
149    checkpoint58d_post
150    o upgrade simple test-experiment to tutorial example:
151     step.1: duplicate the experiment and (step.2) will remove the old copy.
152      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
153      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
154      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
155      tutorial_global_oce_biogeo    <- copy of dic_example
156      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
157      tutorial_plume_on_slope       <- copy of plume_on_slope
158      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
159      tutorial_global_oce_optim     <- empty for now (David ?)
160      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
161     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
162    o correct a sign problem in cost_scat.F
163    o obcs and ptracers: fix boundary conditions for advections schemes
164      with larger stencil
165    o thsice adjoint: start
166    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
167      completeness
168    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
169      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
170    o ptracers adjoint:
171      * avoid extensive recomputatations
172      * fix missing re-init. of gptr (missed by TAF)
173    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
174      me to turn off the excessive output to STDOUT that this package produces
175    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
176      and add those terms in Vector-Invariant formulation.
177    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
178      if the control period (xx_hfluxperiod etc) is 0
179    o in profiles pkg, clean routines and fix details
180    o in ecco pkg, reading ssh data:
181      fix problem in case the model does not start at iter0=0
182    o fix mnc-pickup/restart for ptracers
183    o new package prifiles:
184      code to compute profile-based cost by Gael Forget
185      (modifs in ecco, ctrl, autodiff)
186    o Benign bug fix in initialization (spotted by M. Mazloff) of
187      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
188    
189    checkpoint58c_post
190    o adjoint: finish NLFS adjoint and provide reference output in
191      verification/global_ocean.90x40x15/results_ad_nlfs
192    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
193      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
194      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
195      with SEAICE_CGRID defined.
196    o move calendarDumps from "data" to "data.cal" and clean-up the code
197      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
198    o add useEXF & useCAL flags (for now, set in hard-coded way)
199    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
200      (were missing in NH mode, and wrong in quasihydrostatic mode).
201      waiting for Chris updated version of calc_gw to add those CALLs.
202    o fix bug in quasihydrostatic S/R ;
203      add a test for this option: global_ocean.90x40x15.qshyd
204    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
205      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
206    o add on/off flag useOffLine for package OFFLINE
207    o seaice:
208      - modify advection so that it works also on the C-grid
209      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
210        problem in multi-tile runs with C-grid
211      - add flags for clipping ice velocities and/or masking solver forcing
212      - fix drag (ocean on ice) formulation and a bug that caused noise in the
213        C-grid solver
214      - added a few comments to seaice_diffusion.F
215      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
216        are now exclusive)
217      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
218        required re-ordering the code a little:
219       + make DAIRN global variable (defined in SEAICE)
220       + move computation of the viscosities eta and zeta into a new separate
221         routine (because I need to recompute them in seaice_ocean_stress.F)
222    
223    checkpoint58b_post
224    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
225      update output.txt of exp. aim.5l_cs.thSI
226    o various mnc cleanups and improvements:
227      + shrink lookup tables by factor of ~4
228      + better error reporting when running out of lookup space
229      + able to handle longer path/file names (up to 500 chars)
230    o adjoint:
231      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
232      - TBD: "hidden" mom_vecinv recomp. in dynamics
233    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
234     (allow to differentiate between forcing components using new integer flags:
235      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
236     and add new flag to put Dissipation tendency out of Adams-Bashforth.
237    o ecco
238      - enable trend removal from SSH anomaly obs.
239    o adjoint
240      - a fix for PmEpR when #undef EXACT_CONSERV
241      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
242      - try to fix "hidden" recomp. in forward_step for NLFS
243        (NLFS seems broken sometimes after I checked it in)
244    o seaice:
245     - add c-grid version of the dynamic solver:
246       + three new routines that are the c-grid substitute lsr, dynsolver
247         and ostres
248       + put a few fields that were local to dynsolver into global common
249         blocks, so that I can move the computation of stresses etc into
250         seaice_lsr (saves coding but may break the adjoint).
251     - replace more hardwired parameters by runtime parameters
252     - add ice masks that mask the rhs of the implicit solvers where there
253       is no ice (commented out in seaice_dynsolver, because i am not sure
254       if this works properly), eventually this should replace the clipping
255       of ice velocities in seaice_dynsolver to +/-40cm/s.
256    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
257      include it only where its needed
258    o move balancing of fluxes before the call of external_forcing_surf
259    o seaice:
260      - correct units of turning angles (now they are really in degrees)
261      - move computation of GWATX/Y out of main routine into dynsolver
262      - initialize GWATX/Y in seaice_init
263    o Apply mask on Fresh-Water flux (needed for SSH forcing).
264      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
265    o seaice: add runtime flags for turning angles (default to zero)
266    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
267      and trend from exf forcing and ctrl control adjustments
268    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
269      (since checkpoint57x_post)
270    o change the default rotation period to 86164.s = the Earth rotation
271    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
272      and based on a reference stratification. Tested within hs94.cs-32x32x5.
273    o seaice advection: add code for choosing between the default (2nd order
274      central differences) and multiDim advection schemes provided by
275      pkg/generic_advdiff
276    o seaice:
277      - removed all references to SEAICE_GRID.h fields from
278        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
279        (cubed-sphere configuration will change a little)
280      - grid computations in seaice_init are obsolete now.
281      - cleaned up code a little so that is easier to read (hopefully).
282      - added new (better?) discretizations of default advection and diffusion
283        (turn on with SEAICEuseFluxForm)
284      - replace 1 in 3d global fields by kSurface in growth.F
285      
286    checkpoint58a_post
287    o seaice:
288      - bug fix in advect.F
289    o shelfice:
290      - separate shelfice load anomaly from pload (breaks with time
291        dependent forcing), => introduce constant field shelficeLoadAnomaly.
292        Its default is 0., but it may be computed more cleverly from (unknown)
293        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
294        done offline. A good approximation of the pressure load anomaly is
295        necessary to avoid large initial adjustment processes underneath
296        deep-reaching shelfice.
297      - small fix in ISOMIP shelfice_thermodynamics
298      - add more sophisticated thermodynamics of Hellmer (1989), this is
299        now the default
300      - give a few constants more intuitive names
301    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
302      if bulk formulae are used in long integration (especially EmPmR). Turn
303      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
304      if balancePrintMean, the imbalance that is substracted is printed to
305      STDOUT.
306    o fix bug (typo) in obcs_apply_eta.F
307    o add a new package shelfice which enables us to model the circulation
308      underneath shelf-ice with draughts of hundreds of meters.
309     - works
310     - to do: + include improved thermodynamics
311              + check whether kSurfC (from model/inc/SURFACE.h) can be used
312                instead of new field kTopC
313              + can we use topoFile, Ro_surf and existing code in ini_depth.F
314                instead of new field R_shelfIce and new code in ini_depth.F
315                and ini_mask_etc.F?
316              + adjust vertical mixing schemes?
317    o seaice pkg:
318     - add a cpp-flag to include a simple formula for a salinity dependent
319       freezing point of sea water at the surface
320     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
321       meridional stresses are now different (and hopefully correct)
322    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
323       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
324       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
325    o pkg/diagnostics: add options and parameters for regional-statistics
326       diagnostics ; define regions by reading a region-mask from a file
327       (might add other options later)
328    o pkg/bulk_force:
329     - add option and parameters to use AIM surface-flux formulae.
330     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
331       others forcing fields (defined in PARM05, parameter file "data") are loaded
332       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
333     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
334     - use the right EXCH call for uwind,vwind (to work on CS-grid).
335     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
336       and parameters (note: calcWindStress replaces .NOT.readwindstress).
337     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
338    
339    checkpoint58
340    o add "--embed-source" option to genmake2 which, when the supporting
341      tools can be compiled (as determined by genmake2) will turn on the
342      embed_files package which then embeds the entire MITgcm source code
343      (*.[fFhc] + Makefile) used for the build within the executable
344      - requested by CNH but off by default
345      - adds a paltry <9MB to the mitgcmuv executable in most cases
346      - only writes the output when useEMBEDSRC in eedata is true
347    o clean up 3-dim. relaxation codes:
348      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
349      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
350      * Thanks to Tom Haine for testing!
351    
352    checkpoint57z_post
353    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
354      affects output (@ truncation level) of exp. plume_on_slope ; updated.
355    o fix the pickup behavior for obcs in combination with ptracers
356    o fix a bug in ptracers_external_fields_load
357    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
358      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
359    o transfered surface NH pressure to eta field (if exactConserv).
360    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
361         and update lab_sea output.txt file.
362    o completing 3-dim. relaxation code: additional term
363         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
364      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
365      * At compile time, in "EXF_OPTIONS.h" set
366          #define  ALLOW_CLIMTEMP_RELAXATION
367          #define  ALLOW_CLIMSALT_RELAXATION
368      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
369          tauThetaClimRelax3Dim = 15552000.0,
370          tauSaltClimRelax3Dim  = 15552000.0,
371      * 3 cases:
372          1) Use a constant-in-time 3-dim. field
373          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
374          3) Real-time relax. to time-evolving prescribed field
375    o Adding Laplacian-type smoothness constraint on
376      initial and boundary (forcing) controls (ic, bc)
377      * enable at compile-time via
378        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
379      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
380      * Absolute scale somewhat unclear so far
381      * no area weighting was included since no other cost term does so far
382    
383    checkpoint57y_post
384    First step for a NLFS adjoint
385    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
386    o new init. routines for calc_r_star, calc_surf_dr
387    o still need to deal with ini_masks_etc
388    o testreport seemed happy
389    checkpoint57y_pre
390    
391    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
392    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
393    o add new offset feature to offline pkg (plus minor cleanup)
394    o cfc fixes for final year of integration
395    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
396      be in GCHEM_OPTIONS).
397    
398    checkpoint57x_post
399    o fix testreport Pb in multiple test experiment.
400    o cleanup our namelist syntax in verification:
401      - make it more F95 standards compliant (some work still needed)
402      - allows the vast majority of our tests to work with gfortran
403    o Non-Hydrostatic:
404     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
405     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
406    o Allow to apply AB on T,S rather than on AB(gT,gS):
407     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
408     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
409       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
410     - need a "clever" read_pickup to restart from the other AB formulation
411    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
412    o remove some unused variables (reduces number of compiler warnings)
413    o adjoint
414      * Disable useVariableViscosity for adjoint for time being
415        (there are a number of extensive recomputations)
416      * Initialize certain variables needed for adjoint
417    
418    checkpoint57w_post
419    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
420                 fix the singleCpuIO RS version of MDSWRITEFIELD
421       and add a WARNING if using globalFiles=T with multi-processors.
422    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
423      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
424    o tracer advection scheme:
425      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
426       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
427       was not very convenient).
428      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
429       (further tests needed for the implicit DST & Flux-Limiter schemes).
430    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
431      and sRef for convenience, handy, when you want to initialize
432      ptracers in a large domain with a constant non-zero value. Also,
433      untangle ptracers_init.F a little.
434    
435    checkpoint57v_post
436    o change dome exp. to use variable viscosity in side-drag terms.
437    o remove all the files from the cfc_offline test since they are now
438      incorporated into tutorial_cfc_offline which has been producing
439      identical results for a few days of testing
440    o add new parameter: sideDragFactor to enable half-slip-side BC
441      and change side-drag S/R to use viscosity from mom_calc_visc
442      (can switch back by setting sideDragFactor=0.); affects results at
443      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
444       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
445    o vorticity & strain are now computed without masking, to account for
446      no-slip-side BC in variable viscosity calculation ; mask is applied
447      anyway later on, before computing advection/coriolis terms.
448    o modify exp4 to test new obcs support for reading from external files
449      and for passive tracers
450    o fix behavior of ptracers_monitor when monitor output is written to a
451      netcdf-file; still not independent of monitor.F (writes in the same
452      file).
453    o change default value of tRef (put a uniform, meaningful value for ocean
454      & atmos) and initialize sRef (was missing, as Martin mentioned).
455    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
456      to be proportional to enstrophy dissipation length.  Thus,
457       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
458      This is now consistent with Smagorinsky and with the manual.
459    
460    checkpoint57u_post
461    o OBCS and PTRACERS: add open boundary support for passive tracers
462      - either use homogenous (pseudo) v.Neumann conditions or prescribe
463        OB-values from file; this is not different from the way theta and salinity
464        are treated
465      - however, Orlanski-radiation conditions are not supported, and the model
466        will stop if you use pTracers and Orlanski at the same time.
467      - beefed up the rountine obcs_external_fields_load: now only those open
468        boundary values are overwritten with values from files for which there
469        are really files, otherwise the OB-fields remain untouched. This makes
470        it possible to use different OBs at different ends of the domain (as
471        with EXF)
472    o reduce number of exch calls in shap_filt (s2).
473    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
474      truncation level) 4/5 MLAdjust test results (11&12 digits match).
475    
476    checkpoint57t_post
477    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
478    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
479      same truncation, independent of the face number: affects affects several
480      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
481    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
482      note that biharmonic viscosity + no-slip was not tested in any experiment.
483    o fix bug in non-linear free-surf side-drag ; generate new output for
484      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
485    o make mnc honor the writeBinaryPrec flag for most kinds of output
486    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
487    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
488      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
489    o add brackets in multi-terms sum to get same truncation, independent of
490      the face number (manage to get exactly same value of gU,gV at the cs-edge)
491      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
492    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
493      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
494      a maximum grid-scale Reynolds number.  Also, changes all length calculations
495      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
496      Suggested values of viscosity parameters found in mom_calc_visc.
497      Many new viscosity diagnostics available.
498    
499    checkpoint57s_post
500    o Add clearing-house for viscosity calculations, mom_calc_visc and
501      correct numerous bugs in LeithD and Smagorinsky discretizations.  
502      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
503      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
504      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
505      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
506      The Strain-Tension form is now called with useStrainTensonVisc=.true.
507      ViscAhStrain and viscAhTension are now retired.
508    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
509    o In response to JMC's bug report, genmake2 now ignores any soft-links
510      that it finds in the *current* directory when searching for files.
511      Soft-links found in any other source directories will still work as
512      they did before.
513    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
514      a C routine to unlimit the stack size
515    o mnc-ify pkg/aim snapshot vars
516    o mnc-ify pkg/land as requested by Daniel
517    o various changes to mnc including:
518      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
519      - output can now be grouped so that all files within a group
520          change the ITER portion of their names in lock-step together
521      - can now read ("global") PER-FACE (in addition to PER-TILE) files
522          and works with both EXCH1 and EXCH2 (but needs more testing)
523      - writing works for all verification test cases w/ g77 on Linux
524    
525    checkpoint57r_post
526    o make MNC variable initialization happen earlier
527    o add diagnostics for (almost) each term of the momentum Eq.
528    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
529    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
530    o remove MINIMAL_TAVE_OUTPUT option ;
531      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
532    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
533      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
534    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
535    o add time-dependent SST, SSS control
536    o cost terms in ecco/ modularized (new cost_generic.F)
537    o cost_averages routines are modularized (new cost_averagesgeneric.F)
538    o new infrastructure for seaice model vs. obs misfits in seaice/
539      * driver from the_main_loop.F is seaice_cost_driver.F
540      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
541      * gradient check in Exp. 6a of natl_box_adjoint/
542    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
543      (see README file)
544    
545    checkpoint57q_post
546    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
547    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
548      - bug was reported by Jean-Michel and Ian Fenty
549    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
550      update exp. cpl_aim+ocn output.
551    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
552      Needed for high-res. runs with large global files
553      to be able to limit tapelev size
554    o Changed some tests for adjoint:
555      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
556      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
557      * global_ocean.90x40x15/ back to default 3-level checkpointing
558    o Modifications to enable scripted COMMON to MODULE conversion
559      * verification/OpenAD/code/ has necessary scripts and description;
560      * converts, compiles and runs successfully;
561    
562    checkpoint57p_post
563    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
564    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
565      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
566    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
567    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
568      (was already the case for dissipation with mom_vecinv,
569       and also the case for grad.PhiHyd when staggered-timeStep)
570      This will allow to put dissipation out-off the AB time-stepping.
571     Unfortunately, affects truncation error. Update output of exp. that "fails"
572      (cg2d matching number) and leave the others for later: front_relax(10),
573      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
574      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
575    
576    checkpoint57o_post
577    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
578      (2) its ready to be documented during the 20050801 DocFest
579    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
580      for ideal_2D_oce and lab_sea on linux_ia32_g77
581    o set to #undef CTRL_SET_OLD_MAXCVARS_30
582      in global1x1_tot/code_seaice_adj to access indices 32, 33
583      (worth another tag)
584    
585    checkpoint57n_post
586    o adding precip control xx_precip 32
587    o adding swflux control xx_swflux 33
588    o Replacing 10 forcing penalty cost routines by 1 generic.
589    o Implementing partitioning in time-mean and variable adjustment
590      for atmos. state.
591    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
592    o in natl_box_adjoint:
593      * updated exp 1 to 10
594        (but does not have time-mean vs. variable split results yet)
595    o updated global1x1/*_seaice_adj/
596      to incorporate latest changes
597    o enable useSingleCpuIO for mdsio vector routines
598      (applies in particular to tapelev I/O)
599    o removed inefficient K-loop in all active_file*control*.F
600    
601    checkpoint57m_post
602    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
603      and advect_cs (use EXCH-2 and standard cs-32 grid files).
604    o pkg/exch2: filling of face-corner halo regions is optional
605      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
606    
607    checkpoint57l_post
608     tag before updating tutorials (pre-release-2)
609    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
610       for output and interpolation of input fields onto model grid)
611    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
612       Affects results of exp. rotating_tank ; update output.txt.
613    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
614          and taking the square quantity and/or using a fraction-weight field.
615    o fix aim_diagnostics_init.F mate numbers.
616    o add mnc output capability to diagnostics/diagstat and update
617      our cvsignore files for the ACSII output generated
618    
619    checkpoint57k_post
620    o lab_sea now uses diagnostics package and provides a suite of
621      new EXF diagnostics output.
622    
623    checkpoint57j_post
624    o exf
625      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
626        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
627        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
628      * extended diagnostics output
629        - now includes all EXF variables
630        - hs, hl moved to common block
631        - separate S/R for diagnostics, called after ctrl vector is added
632        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
633        - EXFqnet contains true Qnet (i.e. includes qsw)
634      * updated verif. lab_sea, global_with_exf
635      * Rearranging hflux (exf_mapfields -> exf_getforcing)
636        to ensure that diagnostics sees a true EXFqnet
637    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
638    o diagnostics pkg: change pointers so that 1 diagnostic can be used
639      several times with different frequencies.
640    o mnc-ify the thsice package as requested by Daniel Enderton
641      - the monitor--MNC output needs work
642      - many attributes need to be added (most are currently blank)
643    o mnc-ify theaim_v23 package as requested by Daniel Enderton
644      - many attributes need to be added (most are currently blank)
645    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
646    o add Sadourny like discretization to the 4th.O vorticity advection scheme
647    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
648      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
649         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
650    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
651     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
652    
653    checkpoint57i_post
654    o Diagnostics package was changed: diagnostic allocation is now deactivated
655      by setting an empty file name in the namelist (used to be by setting 0 frequency)
656    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
657      add 1rst Order upwind vertical Shear.
658    o add a quick fix for A/B checkpointing in OFFLINE mode
659    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
660      end-run around the C/Fortran linking horror in eesup/src/timers.F
661    o added pkg/runclock: allows user to terminate run based on wall clock
662    o added non-hydrostatic scaling parameter: nh_am2
663    o pkg/my82: futile attempt to make results compiler-independent by adding
664      some "_d 0", etc. no effect.
665    o for mnc output, fill the 'T' coordinate var with myTime and create a
666      separate 'iter' variable for iteration count
667    o pkg/diagnostics:
668      add new capability: output of Global/Regional & per-level statistics ;
669      tested against monitor output (including land & thSIce) on various exp.
670    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
671    
672    checkpoint57h_done
673      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
674      data.diagnostics, data.gchem, data.ptracers) is done.
675    
676    o pkg/diagnostics: prepare for Global/Regional statistics.
677      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
678    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
679      and rename it: DIFFERENT_MULTIPLE
680    
681    checkpoint57h_post
682    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
683    o pkg/diagnostics: change output frequency, now in seconds (instead
684      of Nb of iterations). This requires to change data.diagnostics.
685    checkpoint57h_pre
686    
687    o in mnc, let the user create the output dir if both mnc_outdir_date
688      and mnc_outdir_num are false
689    o add fflags() to pkg/diagnostics which allows one to specify, on a
690      per-file basis, the file precision [default behavior is unchanged]
691    o added diagnostics to pkg/kpp, including computation of mixed layer
692      depth based on a temperature/density criterion
693    o updated verification/natl_box to test the new pkg/kpp diagnostics
694    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
695    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
696    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
697      not mnc -- this mistake was found by JMC and is now corrected
698    
699    checkpoint57g_post
700    o add Adams-Bashforth 3rd Order time stepping:
701      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
702      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
703    checkpoint57g_pre
704    
705    o make lambda[Theta,Salt]ClimRelax spatially varying
706      (default remains spatially uniform constant based on tau)
707    o added new control variables
708      * init. uVel, vVel, etanN
709      * lambda[Theta,Salt]ClimRelax
710    o separate masks used for ctrl_pack/unpack 'from write_grid' output
711      (suggested by G. Forget)
712    
713    checkpoint57f_post
714    o add parameter "baseTime" = model base time = time at iteration zero
715      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
716      account for baseTime shift
717    o move Coriolis arrays from PARAMS.h to GRID.h
718    checkpoint57f_pre
719    
720    o mnc-ifying the seaice package
721    o introduced an alternative length scale calculation for use in the limiting
722      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
723    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
724    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
725      as well as grad(vort3).  Made it compatible with both approximate form
726      for the cubed sphere and full form of these gradients.  Added flag
727      useFullLeith to select between approximate and full form.  
728    o add "d0" in getcon.F to reduce differences between compilers/platforms
729      update output.txt of exp. fizhi-gridalt-hs
730    o change port_rand funtion to allow to set the seed.
731    o fix obscure MNC bug involving conversion between reals and integers
732      - it caused no problems with certain (eg. gcc, ifc) compilers but the
733        new version is now more standards-compliant
734    o adjoint-related modifications
735      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
736      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
737      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
738    
739    checkpoint57e_post
740    o Adding eddy stress controls a la Ferreira et al.
741    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
742    
743    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
744      update output.txt of exp. fizhi-gridalt-hs
745    o add more "Z" dimensions and associated coordinate vars to MNC
746    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
747    o parameter calendarDumps: when set, approximate months (30-31 days) and years
748      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
749      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
750      months and years.  Requires pkg/cal.
751    o diagnostics: add pickup functionality
752      - off by default for backwards compatibility
753      - current version only uses MDSIO -- MNC will be added
754    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
755    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
756    
757    checkpoint57d_post
758    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
759    o modify verification/ideal_2D_oce so that it tests the creation of mnc
760      output from the diagnostics package
761    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
762    o make genmake2 more portable by using ".$FS" instead of ".f" for more
763      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
764    o add coordinate variables to the MNC output from the diagnostics package
765    o change MNC-flags default value: true when useMNC=TRUE
766    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
767      the ability (off by default) to read the grid information using MNC
768    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
769    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
770    o do snap-shot diagnostics at the middle of the time-interval (instead of
771      at the end).
772    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
773      new test for AIM with thSIce + slab-ocean
774    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
775    o move state variable diagnostics to the beginning of the time step ;
776      (note: still needs some work specially for snap-shot diagnostics)
777      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
778    
779    checkpoint57c_post
780    o Change testing option (-ieee) to get closer agreement between g77 & ifort
781    o generate new output.txt files on faulks with g77 & the new -ieee option
782    checkpoint57c_pre
783    
784    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
785      update output.txt of exp. global_ocean.90x40x15
786    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
787      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
788    o add saltFlux(+File) forcing capability with periodicExternalForcing
789    o allow to use pkg diagnostics for GM-Redi & ThSIce output
790    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
791    o improvements for the MNC output from DIAGNOSTICS:
792      - correct handling of the unlimitied dimension
793      - all dims now have associated coordinate variables
794      - variables located at U, V, and Corner ("Z") points are now written
795        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
796        *all* data points are output
797    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
798    o added pkg/seaice/seaice_monitor.F
799    o mdsio_readfield.F can now read files visible only to master MPI process.
800    o pkg/seaice: some test code for ice-modified ocean stress
801    o exf_getffields interpolation defaults to bilinear for all scalar forcing
802      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
803      spurious negative numbers for precipitation and humidity.  Will cause
804      some small numerical differences for integrations using pkg/exf/exf_interp.F.
805    o pkg/ctrl/
806      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
807        May be enabled via doPackDiag
808      *  introduce z-scaling of
809         + gradient (doZscalePack) and
810         + control (doZscaleUnpack)
811    o pkg/mdsio/
812      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
813      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
814    
815    checkpoint57b_post
816    o simplify options in diagnostics_fill arguments (remove weird combinations)
817    o fix MNC coordinate variables so that they now contain per-face index
818      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
819      general, EXCH2 grids are only aligned to a "local" coordinate system
820    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
821    o Implement instantaneous output within pkg diagnostics:
822      setting a negative frequency in data.diagnostics produces
823     "snap-shot" output (as opposed to time-average if freq > 0)
824    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
825      NOTE: change ptracer diagnostics name: use 2 characters to work with
826            more than 9 tracers. Add also diagnostics of advect & diffus flux.
827    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
828      becomes the coordinate variable for the 'T' dimension
829    o add CF-style coordinate variables to MNC
830      - just a first cut:  numbers are meaningless on the cubesphere and
831        missing along the T axis but otherwise it works!
832    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
833    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
834    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
835      this is based directly on what the model compute, so that the content of
836      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
837    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
838    o clean up build options files for SunOS, in particular
839      - remove -traditional from xmakedepend
840      - change -xarch=v9 to -xarch=native for f77
841      - restore use of make (not gmake)
842      - add CC=gcc if using g77
843    o changes per discussion of AM, JMC, & EH3 today:
844      - move redundant "grid" variables out of "state" -- in preparation of
845        creating proper CF-style coordinate variables and in recognition
846        that any/all grid variables can be easily copied (eg. w/NCO) from
847        the grid files into any of the other NetCDF files
848      - *always* output grid variables with MDSIO (this will eventually be
849        changed)
850      - output MNC grid file if useMNC is true
851    o every instance of _END_MASTER() has been found and replaced with
852      _END_MASTER( myThid ) in order to satisfy certain picky Sun
853      preprocessors
854    o re-arrange diagnostics pkg initialisation:
855     - allow each package to extend the available diagnostics list
856     - add some checking and fix small problems (multi-threaded, ...)
857     - new S/R diagnostics_fill (replace fill_diagnostics):
858       look through the short list of active diag. (instead of the long list)
859       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
860    
861    checkpoint57a_post
862    o this set of changes restores TAMC compatibility
863      tested for global_ocean.90x40x15 adjoint on trough
864      (what a pain)
865    
866    checkpoint57a_pre
867    o some modifs in tools/build_options for sunos
868    o call ctrl_pack for ctrl at end for optimcycle=0
869    
870    checkpoint57
871    o add horizontal bi-harmonic viscosity for vertical velocity
872      - new parameter viscA4W (defaults to viscA4)
873      - affects only non-hydrostatic code
874      - to be done: no-slip lateral boundary conditions
875    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
876    o implement Implicit Vertical advection for pTracers
877    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
878      (implemented also for implicit vertical diffusion & advection)
879    o OBCS: extend application of tracer open boundary conditions
880      to a strip beyond the boundary of width Olx/Oly
881    o add call monitor to TAF set of required calls (flow directives)
882      and include in natl_box_adjoint
883    o untangle a few ifdefs related to cost, ctrl, autodiff
884      untangel a few ALLOW_ECCO_OPTIMIZATION
885    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
886      (theta2, salt2 in ecco_cost_weights)
887    
888    checkpoint56c_post
889    o OBCS as control variables
890      - update ctrl_ad_diff.list, obcs_ad_diff.list
891      - remove balance of obcs controls from default
892      - fix index bug nobcs in ctrl_init
893      - fix dummy fields filen in ctrl_pack
894      - add dummy weights for obcs
895    o lsopt: comment out fort.94 output
896    o optim:
897      - remove unnecessary header files
898      - adjusted namelists
899      - add xerbla.F to Makefile
900    o exf:
901      - multiple modifications of exf_check_range
902      - unit change in exf_init_runoff from [m/year] to [m/s]
903    o mdsio:
904      - i/o-vector change debugLevel from debLevA to debLevB
905    
906    checkpoint56b_post
907    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
908      is called from DO_THE_MODEL_IO
909      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
910      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
911      - clean up PTRACERS_WRITE_TIMEAVE a little
912    o add another verification experiment that tests both the cfc-pkg and
913      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
914      reactive tendencies treated inline with regular timestepping
915    o testreport previously did a lousy job of comparing small numbers, so
916      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
917      implemented in the little c-progam tmp_cmpnum.c which is embedded in
918      testreport.
919    o ptracers_monitor: bug fix for MPI
920    
921    checkpoint56a_post
922    o GCHEM: finish reorganizating the package
923      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
924        (introduces another 3D-array for each passive tracer, but only if
925        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
926        gchemTendency is not needed because the timestep is done separately)
927      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
928      - GCHEM is now---more or less cleanly---separate from PTRACERS
929      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
930        so clear to me how that should be done in a general way.
931    o CFC: improve formatting of output in CFC_ATMOS
932    o PTRACERS:
933      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
934        that ALL experiments with ptracers enable can be checked. This makes
935        GCHEM_MONITOR obsolete.
936      - include a runtime parameter PTRACERS_monitorFreq that defaults to
937        monitorFreq
938      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
939    o add PTRACERS (PTR0[1-5]) to testreport output
940    o exf_check_range:
941      * default changed to .TRUE.
942      * will check values for niter0 if debLevA, every timestep if debLevB
943      * STOP in exf_check_range if 'out of range'
944      * range chosen generous to allow for potential extema
945      TBD: a version with stricter range
946           permitted range would be runtime parameters
947    o GMredi:
948      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
949      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
950      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
951    o GCHEM:
952      - move call to GCHEM_FORCING_SEP, so that it is now called before
953        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
954      - introduced a useGCHEM runtime flag and applied it everywhere.
955      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
956        this flag is now only visible within GCHEM-pkg routines.
957      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
958        be replaced by a 3D array that is computed before thermodynamics; for
959        this, the tracer ID iTracer had to be included into the parameter list
960        of ptracers_forcing
961      - set up forward_step to call gchem_forcing, that will replace
962        gchem_forcing_int in ptracers_forcing
963      - cleaning up
964    o small cleaning of exch2: remove files that are also in eesupp/src
965    
966    checkpoint56
967    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
968    o mnc: cleanup "full" files--fixes out-of-memory problem
969    o ECCO-GODAE
970      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
971      * fully merged and updated from SIO code
972        windstress sign change affects
973        - exf_inscal_[u/v]stress
974        - sign of xx_tau[u/v] adjustments
975        - signs in cost_scat
976      * ctrl_get_gen: avoid update of tau[u/v] for first few days
977      * natl_box_adjoint updated and compressed
978      * 2-level checkpoint switch added
979        (tested in EXP. 1 of natl_box_adjoint)
980      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
981    o SVD
982      * first complete, non-hacked version for SVD calculations
983      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
984        performed via direct access files admtlm_vector.it????
985        (via ctrl_[un]pack)
986      * optimcycle is used for ARPACK iteration counter
987        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
988      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
989        and add linear transforms where necessary
990      * controls are initial/final SST, SSS (can be extended; need to check
991        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
992    o mdsio: filename info to both stderr, stdout
993    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
994      from sign change
995    
996    checkpoint55j_post
997    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
998      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
999    o add consistent build directories and .cvsignore files to verification
1000    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1001    o make all subroutines 30 or less characters in length for certain older
1002      compilers to work (a thorough search only turns up two routines in
1003      pkg/ptracers)
1004    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1005      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1006    
1007    checkpoint55i_post
1008    o change arrays for total vertical diffusivity (2.D if explicit,
1009      3.D if implicit) ; each ptracer uses its own background value.
1010    o added mnc/NetCDF output capability to ocn_compon_interf
1011      - added bits to verification/cpl_aim+ocn so that it can run on
1012        ITRDA and other clusters without the mpirun "-wd" option
1013    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1014      configuration
1015    o give MNC the ability to create additional files rather than
1016      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1017      - the default is just less than 2GB which is a practical limit
1018        on many systems
1019    o Compute the non-local term using either KPP vertical diffusivity (=default)
1020       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1021    
1022    checkpoint55h_post
1023    o add verification test "vermix"
1024    o remove all the *_ioinc flags and replace with the single global
1025      outputTypesInclusive flag
1026    o allow to set a vertical profile of vertical diffusivity for T & S
1027    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1028    o useMNC moved from data.mnc to data.pkg
1029    
1030    checkpoint55g_post
1031    o Renaming carbon AD experiments to comply with testreport conventions
1032    o Updating adjoint of Held-Suarez hs94.1x64x5
1033    o Fixing directives for non-ECCO forward_step, after ECCO directives
1034      have been fixed to avoid recomp. of do_oceanic_phys
1035      Works well for global_ocean.90x40x15,
1036      but recomp. issue remains for carbon
1037    o Updating adjoint output for natl_box_adjoint after
1038      pkg/ecco has been modified (see taga c55d_post)
1039    
1040    checkpoint55f_post
1041    o rename to timeave_init_fixed
1042    
1043    checkpoint55e_post
1044    o some delicate re-shuffle of store directives to avoid one
1045      extra call of do_oceanic_physics
1046      affects ecco_the_main_loop.F, do_oceanic_physics.F
1047      checkpoint_lev1_directives.h
1048    o NB: this may break global_ocean adjoint temporarily,
1049      but it is clear how to fix it. Will do later, need this now.
1050    
1051    checkpoint55d_post
1052    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1053    o ecco_cost_weights is modified to 1x1 runs
1054    o modifs to allow observations to be read in as
1055      single file or yearly files
1056    o enable to read exf forcing fields as either
1057      single file or yearly files (flag useExfYearlyFields)
1058    checkpoint55d_pre
1059    
1060    o switch between 2-level and 3-level checkpointing
1061    o add ability of MNC to write local and "partial" (eg. 2D slices where
1062      the full 3D field is never actually stored) arrays to NetCDF files
1063      with the correct (that is, the complete multi-dimensional) set of
1064      array indicies
1065      - used in mom_vecinv() to write the diagFreq output
1066      - tested (demonstrated) in verification/aim.5l_cs
1067    o further mnc-ification
1068      - add verification/lab_sea to the list with mnc setups
1069      - fix undefined mnc v-names in cd_code
1070      - add kpp to mnc output (both snapshot and timeave)
1071    o non-hydrostatic code
1072      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1073        in calc_gw.F
1074      - defaults to viscAh
1075      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1076        friction or Leith) in non-hydrostatic mode, as long as there is
1077        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1078    o pkg/cost
1079      extend simple cost functions to treat time mean quantities
1080      (T,U,V) via cost_accumulate_state from cost_tile
1081    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1082        be 2 times larger than the minimum size the advection scheme requires.
1083        now get a perfect conservation of salt in advect_cs test-exp (updated)
1084    o GGL90 (Gaspar's TKE mixed layer)
1085      - add horizontal diffusion of TKE, requires exchanges in
1086        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1087        default. In OPA there is no horizontal diffusion of TKE but the
1088        mixing coefficients are computed from a horizontal average of TKE of
1089        6 points or so. I think that diffusion has a little more physical
1090        justification.
1091      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1092        was in vain)
1093      - mask tke-variable in ggl90_init
1094    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1095    o fix biharmonic diffusion on CS-grid.
1096    o more obcs stuff
1097      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1098        for reading boundary values. This routine is called from
1099        obcs_prescribe_read
1100      - updated obcs_check
1101      - changed sponge layer relaxation parameter units for days to seconds
1102      - turned off sponge layer by default
1103      - changed argument list of OBCS_CALC to myTime+deltaTclock
1104      - fixed about 35 bugs in obcs_external_fields_load
1105    
1106    checkpoint55c_post
1107    o obcs stuff
1108      - new runtime flags useOBCSprescribe, useOBCSbalance
1109      - re-arranged obcs_calc
1110      - moved exf_getobcs to obcs_prescibe_read
1111        obcs_prescibe_read is called after ORLANSKI stuff
1112        and independent of it (executable can contain all).
1113      - updated obcs_check
1114      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1115        These may be necessary only if tangential velocities are
1116        prescribed at OB, not sure, needs testing.
1117    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1118      which simplifies the calls and passes the ifc check-bounds test
1119    
1120    checkpoint55b_post
1121    o add a 2D scalar, Z location, exchange_2 routine.
1122    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1123      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1124      affects advect_cs results (for the wrong reason): update output.txt
1125    o use a more standard discretization for biharmonic viscosity ;
1126     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1127      affects results of dome set-up: update output.txt
1128    o fix gad_advection.F (CubedSphere part), back to version 1.23
1129    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1130    
1131    checkpoint55a_post
1132    o merged code to
1133      * prescribe/read time-dependent open boundaries
1134        (works in conjunction with exf, cal)
1135      * sponge layer code for open boundaries
1136      * each boundary N/S/E/W now has its own CPP option
1137        (healthy for the adjoint)
1138    
1139    checkpoint55
1140    o up-to-date adjoint of previous breaks
1141      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1142      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1143      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1144      - carbon: * remove tr1-related adjoint verification
1145                * add ptracer as control variable
1146    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1147      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1148    
1149    checkpoint54f_post
1150    o in verification/carbin/ remove experiment related to
1151      ALLOW_PASSIVE_TRACER (array tr1 etc)
1152      code_ad/ input_ad/ results_ad
1153    
1154    o add two new packages
1155      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1156        + subject to optimization (memory)
1157      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1158        + subject to reordering (many GOTOs in the original code)
1159        + so far opps is called for every (i,j) point, and then operates in
1160          the vertical; one may want to reorder the scheme in order operate in
1161          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1162          fields)
1163    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1164      - all verification tests compile and run with linux_ia32_g77
1165      - defaults are compatible with current input files--nothing
1166        should change if you were not previously using MNC
1167      - MNC output has been added in numerous places (eg. timeave)
1168        but there are still a few writes not yet do-able with MNC
1169        (this is in progress)
1170      - flags now allow for either/or/both use of MDSIO and MNC and
1171        documentation will soon follow
1172      - numerous small formatting cleanups for ProTeX
1173    o add version info (via BUILD_INFO.h) to MNC and stdout
1174    
1175    checkpoint54e_post
1176    o add two new packages
1177      - pp81 (Packanowski and Philander, 1981), Richardson number and
1178        stratification dependent mixing
1179      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1180      - these scheme operate in a similar manner as KPP (without ghat, of
1181        course), however there is only one diffusivity that is used for both
1182        temperature and salinity (and passive tracers)ç
1183    o add offline package
1184    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1185      provided by Stephanie Dutkiewicz
1186    o genmake2: add ability to search for C compilers and cleanup test output
1187      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1188    
1189    checkpoint54d_post
1190    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1191    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1192      leading to additional shift by 5 days each year of integration
1193       (i.e. leading to considerable offset over the years)
1194    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1195    o start with no AB and no initial filtering (staggerTimeStep):
1196      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1197    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1198      (external loading & cpl import/export stay in forward_step.F)
1199    o update coupling interface to work with new staggerTimeStep
1200    o change MDSIO ptracers_pickup.
1201    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1202    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1203    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1204    
1205    checkpoint54c_post
1206    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1207      this affects (truncation error) output.txt of test-exp:
1208       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1209    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1210    o change Qnet to always be the net heat flux, (+upward).
1211      affects (truncation error) output of natl_box exp.: updated
1212    o define the max number of passive tracers in PTRACERS_SIZE.h
1213    o start to test mnc routinely in exp0
1214    o add sea-ice loading (sIceLoad) as a new forcing field.
1215    
1216    checkpoint54b_post
1217    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1218       impressive on Altix and Opteron systems)
1219    o diagnostics can now write NetCDF files through the mnc package
1220    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1221    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1222    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1223      affects (truncation error) output of lab_sea & natl_box exp.: updated
1224    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1225    
1226    checkpoint54a_post
1227    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1228    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1229    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1230    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1231      + internal_wave (shift in writing cg2d_ini_res)
1232    checkpoint54a_pre
1233    
1234    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1235      - modified verification/lab_sea and natl_box_adjoint accordingly
1236    
1237    checkpoint54
1238    checkpoint53g_post
1239    o prepare splitting of thermodynamics: store convect.counter in common block
1240    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1241      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1242    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1243    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1244    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1245    o restore adjointability
1246    
1247    checkpoint53f_post
1248    o modifications that affect AIM experiment results (update output.txt):
1249      - no advection of S at top interface Nr (pkg/generic_advdiff)
1250      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1251    o AIM pkg:
1252      - include stability function into surf.Flux derivative relative to Tsurf
1253      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1254    
1255    checkpoint53e_post
1256    o merged cylindrical coord configuration
1257    o added rotating_tank experiment
1258    checkpoint53e_pre
1259    
1260    checkpoint53d_post
1261    o faulks upgraded: re-generate output.txt that have changed:
1262       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1263    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1264    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1265    o added Sadourny discretization of Coriolis
1266      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1267      - re-enabled use of omega3 (useAbsVorticity)
1268    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1269      vector-invariant equations
1270      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1271    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1272      hopefully without new bugs
1273      - still to do: biharmonic friction for non-hydrostatic w
1274    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1275    o regenerated output for global_ocean_ebm (using -ieee)
1276    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1277      of mom_common/
1278      - simple re-arrangement of instructions within computing loop
1279    checkpoint53d_pre
1280    
1281    checkpoint53c_post
1282    o new version of coupler for AIM+thSIce and Ocean models
1283     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1284     - land: change Evaporation of snow
1285     - aim with thSIce: fix bug in snow-precip.
1286    o changes to calc_gw.F
1287     - bug fix for w^2 term near the bottom boundary
1288     - (hopefully) improve the lateral slip boundary condtions for use with
1289        partial/looped cells
1290      - because the bug fix changes two verification experiments anyway (exp5
1291        and plume on slope), change the lateral boundary condition from half slip
1292        to the value of no_slip_sides
1293    o ebm package wasnt quite up to the parallel task. Fixed that.
1294    o Adjoint of EBM package + verification
1295      * TLM OK
1296      * ADM not sufficient accuracy yet (needs further testing)
1297    
1298    checkpoint53b_post
1299    o Commiting new energy balance model to repository
1300      * package is pkg/ebm
1301      * verif. is verification/global_ocean_ebm
1302      * references are in ebm_driver.F
1303    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1304    C        Global thermohaline circulation. Part I:
1305    C        Sensitivity to atmospheric moisture transport.
1306    C        J. Climate 12(1), 71-82
1307    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1308    C        Global thermohaline circulation. Part II:
1309    C        Sensitivity with interactive transport.
1310    C        J. Climate 12(1), 83-91
1311    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1312    C        Destabilization of the thermohaline circulation
1313    C        by atmospheric eddy transports.
1314    C        J. Climate 7(12), 1870-1882
1315    o Will need long integration testing.
1316    checkpoint53b_pre
1317    
1318    o created pkg/mom_common in preparation for variable viscosity code
1319    o renamed and split ini_mnc_io
1320    o pkg/land: only liquid water can diffuse or run-off
1321    o AIM using land: soil wetness availability account for snow
1322    o added printMapIncludesZeros to EEPARMS namelist
1323    
1324    checkpoint53a_post
1325    o restore TAMC compatiility for exf_constants.h
1326      (no usage of _d in .h)
1327    o Additional storing in KPP in an attempt to fix
1328      TAMC problem with adjoint of KPP code.
1329      (no success...)
1330      Identical code works fine with TAF.
1331    o Fixed verification/natl_box_adjoint experiments.
1332      Initial conditions for Experiments 4 and 5 are now
1333      set to "SEAICE_initialHEFF=0", which is more reasonable,
1334      and hence gives results closer to that of Experiment 2.
1335      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1336    
1337    checkpoint53
1338    o stable checkpoint with up to date adjoint
1339      TLM tests only run for 1st grdchk at the moment. Its unclear if
1340      this is a code problem or a problem with resetting code for g_
1341      variables that is being autogenerated wrong.
1342      Otherwise:
1343       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1344       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1345         are both still in chaos following their security messes.
1346    
1347    checkpoint52n_post
1348    o various build (mostly genmake2) changes including:
1349      - ability to build/run more easily within Cygwin and MacOS X
1350      - more complicated Makefiles with a stronger dependence on Gnu Make
1351    o pkg/seaice modifications
1352      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1353        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1354        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1355      - changed proxy for geostrophic velocity and updated
1356        verification/lab_sea/results/* accordingly
1357      - removed ADI dynamic solver from pkg/seaice
1358      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1359        they caused a segmentation fault under certain circumstances
1360      - removed unused field WATR
1361    o bug fix in exf-package:
1362      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1363         now reflect that.
1364    o small fixes in the cal-package:
1365      - set reference date to first of January for the 'model'-calendar
1366      - failing of cal_CheckDate in cal_FullDate now actually results in a
1367        warning
1368    o small modifications in exf-package to increase flexibility:
1369      - change climtempfreeze from a constant to a runtime parameter that
1370        is specified in data.exf_clim (default = -1.9)
1371      - introduce runtime parameter windstressmax (default = 2.0) that is
1372        specified in data.exf
1373    o fix in pkg/thsice:
1374      - update Evap (Tsf changes) to be consistent with Latent heat flux
1375      - maintain snow precipitation unchanged (even if Tsf >=0).
1376     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1377    
1378    checkpoint52m_post
1379    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1380      this does not change any of the results, because myIter=0 in swfrac always
1381      lead to jwtype=2 (the default anyway), but the call makes little sense
1382      as a default
1383    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1384    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1385      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1386    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1387    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1388    o extending useSingleCpuIO option to work with new exch2 I/O format
1389      - old-style, missing-tile I/O is still accessible by defining CPP
1390        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1391    o monitor package can write to NetCDF files and/or STDOUT
1392    o fix re-definition bug in MNC_GRID_INIT_ALL()
1393    o doc/api_reference added
1394      - a framework for building an API Reference Manual using all
1395        the "protex" comments embedded in the code
1396      - see pkg/generic_advdiff, pkg/mnc for examples
1397    o MNC:
1398      - make myThid the last argument for all subroutines
1399      - new default for the grid files: NO halos
1400      - add useMNC and other run-time flags
1401      - separate per-file-group handling of the unlimited dimension
1402      - early initialization of MNC w/ flags read at the eeboot stage
1403        and lookup tables set in initialize_fixed
1404      - write all MNC output to a freshly-created directory
1405    o thermodynamics sea-ice (thsice) is now tested with testreport.
1406    o test exp. advect_cs: use the standard cs32 grid ; update output.
1407    o Added functionality to grdchk:
1408      pick global i,j,k position (or nearest wet) where to perform check.
1409    
1410    checkpoint52l_post
1411    o new land formulation:
1412      a) use ground enthalpy as prognostic variable to ensure exact
1413         energy conservation.
1414      b) account for water temperature and for latent heat of freezing
1415         in all processes (rain, run-off, ground storage)
1416      c) compute surface and ground temperature implicitly.
1417    o aim_v23 modification for new land model:
1418      a) Treat separately land / ocean / sea-ice surface fluxes
1419         to allow implicit computation of land & sea-ice surface temp.
1420      b) add snow precipitation.
1421    checkpoint52l_pre
1422    
1423    o fix problem (when 1 tile is empty) in min/max monitor.
1424    o fix bug in timeAve (u,vZetatave in common block)
1425    o no restoring terms under ice for pkg/seaice
1426    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1427    o bug fix for pkg/seaice pickups
1428    o change MNC call locations and add coordinate attributes
1429    o mask vorticity at the corner ; affects global_ocean.cs output
1430    o fix ini_curvilinear_grid ; test CS experiments with mpi
1431    o aim.5l_cs: modify sea-ice fraction input file ; update output
1432    o exf: Adding simple range check routine for exf fields after read
1433    
1434    checkpoint52k_post
1435    o removed top-level directory "diags"
1436      - we migrated these functions to pkg/timeave a long time ago
1437    o fixed bug introduced in pkg/monitor
1438    o accuracy ctrlprec = 32 insuffient for gradient checks using
1439      averaged fields (I/O via cost_averages)
1440      -> use ctrl.h in active_file*.F to control I/O precision.
1441    o paramter list of CALL ADTHE_MAIN_LOOP
1442    o added initial do_the_model_io to ecco
1443    o set all ...Freq to zero after cost_final
1444      taveFreq, dumpFreq, pChkptFreq
1445    o MAIN and ECCO differentiability restored
1446    
1447    checkpoint52j_post
1448    o fix nchklev in tamc.h for global_ocean...
1449    o Bringing flow and store directives up-to-date
1450    o Really weird thing!
1451      call do_the_model_io from the_main_loop with parameters
1452      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1453      TAF places a faulty re-call of initialise_varia
1454      after cost_final call which should not be there!
1455    checkpoint52j_pre
1456    
1457    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1458      error messages
1459    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1460    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1461      debug output
1462    o modfied mdsio_writefield.F to handle non-global files under exch2
1463    o update AIM Cubed-Sphere exp (aim.5l_cs):
1464      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1465    o update AIM Equatorial Channel exp:
1466      use standard aim_v23 pkg and change the SST fields to be more realistic.
1467    o globalFile now works with exch2
1468    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1469      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1470    o limit timeave output for hi-res integrations
1471    
1472    checkpoint52i_post
1473    o removed CPP_EEOPTIONS.h from verification/*/code
1474    o updated the tiling for global_ocean_pressure
1475    checkpoint52i_pre
1476    
1477    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1478      the old pkg/aim).
1479    
1480    checkpoint52h_pre
1481    o shortened offending lines in exch2_send_rx?.template
1482    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1483    o genmake2: add build & execute test for NetCDF code
1484    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1485      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1486    o added useSingleCPUIO flag to monitor.F and mon_out.F
1487    o added temporary hack for sea-ice dynamics on the cube:
1488      metric terms are ignored and it is assumed that
1489      there is no sea-ice on cube faces 1, 2, 4, and 5.
1490    
1491    checkpoint52f_post
1492    o added exch2 cube routines to pkg/exch2
1493    o modified hs94.cs-32x32x5 to use it
1494    o added new grid files to hs94.cs-32x32x5
1495    checkpoint52f_pre
1496    
1497    checkpoint52e_post
1498    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1499      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1500    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1501      to work with implicit vertical advection and AB ;
1502    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1503    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1504     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1505    checkpoint52e_pre
1506    
1507    o fix bug in impldiff when Nr=1 or Nr=2.
1508    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1509    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1510    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1511      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1512    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1513    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1514    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1515    
1516    checkpoint52d_post
1517    o re-tiled many expts to allow comparison in multi-processor mode
1518      - updated output accordingly
1519      - changed hs94.128x64x5 to use intial T from file rather than use the
1520        random number generator
1521    o add infrastructure in model routines for fizhi and gridalt packages
1522    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1523    o changes to permit hi-res, cubed-sphere, configuration
1524      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1525      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1526      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1527        of surface winds for the cube
1528      (A verification experiment, based on global_ocean.cs32x15, but with
1529       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1530       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1531       complete with example surface forcing files and matlab scripts to look
1532       at the output and compare it with that of global_ocean.cs32x15.)
1533    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1534       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1535       to conform to the common rule.
1536    o check-in the first version of the coupler + interfaces for multi-components
1537       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1538       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1539       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1540       - ocean and atmos. share the same horizontal grid (no interpolation).
1541       - exchanges between component and coupler is done in forward_step
1542    o new verification experiment, cpl_aim+ocn:
1543       coupled ocean - AIM atmosphere on cs32 grid.
1544    
1545    checkpoint52d_pre
1546    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1547    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1548    
1549    checkpoint52c_post
1550    o Fixing OPTIONS files for use of exf:
1551      - ALLOW_ECCO not needed
1552      - ECCO_CPPOPTIONS.h should not be included from
1553        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1554        as has been the case in the past
1555      - All cal/exf related options are currently set in
1556        single header file. Should remain so until we
1557        agree on a consistent new policy.
1558    o Removed all CPP options for cal package.
1559      cal has no more CPP options.
1560    o modified STOREs in GAD_ADVECTION
1561    o corrected key comp. for passkey
1562    
1563    checkpoint52b_post
1564    o new version: "thsice" of thermodynamic sea-ice pkg:
1565     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1566     - modify fluxes but do not change theta directly;
1567     - light cleaning of bulk_force pkg (still needed with thsice).
1568     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1569       + output_thsice.txt to test thsice & bulk_force pkgs.
1570    o put back grid & coriolis monitor output.
1571    checkpoint52b_pre
1572    
1573    o call "do_the_model_io" at the beginning (=> dump initial state)
1574    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1575    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1576      (need info on NUMBER_OF_PTRACERS)
1577    o missing PTRACERS headers in some routines
1578    o default tamc.h in pkg/autodiff supposed to crash
1579      to ensure proper customization
1580    
1581    checkpoint52a_post
1582    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1583      - moved surfaceTendencyTice from pkg/seaice to main code
1584      - subroutine FREEZE_SURFACE now limits only surface temperature
1585        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1586        => new output.txt for global_ocean.cs32x15 & global_with_exf
1587      - keep the old version of FREEZE for backward compatibility;
1588        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1589      - corresponding modifs for TAF directives
1590    o added surface flux output variables to TIMEAVE_STATVARS
1591    o time-averaged output for pkg/ptracers
1592    o fix problem with ECCO-related divided adjoint
1593      snapshot file was missing some ad-variables,
1594      but no warning issued by TAF
1595    
1596    checkpoint52a_pre
1597    o some bug fixes for #undef REAL4_IS_SLOW
1598    
1599    checkpoint52 = ecco_c52_e35
1600    o after testing adjoints of checkpoint51u_post
1601    
1602    checkpoint51u_post
1603    o this is the post-merge tag of the ecco-branch
1604      (needs another clean checkout and re-testing)
1605    o various natl_box_adjoint configs and results
1606      but no input fields
1607    o obcs adjoint not yet merged!
1608    o adding ECCO global 1x1 and 2x2 degree configs
1609    o updated/extended some store directives for seaice
1610    o pkg/ecco now containes ecco-specific part of cost function
1611    o top level routines the_main_loop, forward_step
1612      supersede those in model/src/
1613      previous input data.cost now in data.ecco
1614      (new namelist ecco_cost_nml)
1615    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1616    
1617    checkpoint51t_post
1618    o this is the pre-merge tag of the ecco-branch
1619    
1620    checkpoint51s_post
1621    o cleanup: removed various obsolete #define-s
1622    o pkg/grdchk
1623      - renamed 'ph-grd 3' to 'grad-res'
1624      - merged from ecco-branch
1625        (remaining bug fixes for obcs gradient checks)
1626      - additional high-precision output for testreport
1627        (grep for 'precision_grdchk_result')
1628    
1629    checkpoint51r_post
1630    o cleaned up or removed CPP_OPTIONS.h files
1631    o updated results for some of the tests to reflect the new
1632      optfiles (-ieee: -O0 instead of -O3)
1633    
1634    checkpoint51q_post
1635    o cd_code:
1636      - moved cd_scheme.F -> cd_code_scheme.F
1637      - separate read_checkpoint from cd_code_ini_vars.F
1638      - separated cd_code part from write_checkpoint
1639      - updated AD_SOURCE, generated .flow
1640      - added CD_CODE_VARS.h to the_main_loop
1641      - Moving cd_code specific store dir.s to pkg/cd_code
1642    o ctrl package totally restructured
1643      - pack/unpack now optional and decoupled from
1644        xx_/adxx_ I/O
1645      - ctrl_pack/unpack cleaned
1646        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1647      - confined inclusion of AD_CONFIG.h to where necessary.
1648    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1649    
1650    checkpoint51p_post
1651    o create initial cd_code package
1652      - WARNING: the initialization of fields within packages
1653        is broken because INI_FIELDS (where READ_CHECKPOINT is
1654        called) is called *before* PACKAGES_INIT_VARIABLES.
1655        This seems to be backwards since
1656        1) its important to initially zero the entire field including
1657           the "halo" region
1658        2) zeroing needs to be done *before* reading pickup info
1659           and the pickup call might or might not happen in any
1660           particular run
1661      - this needs an overhaul for R2
1662    o cleanup verification/*/code/GMREDI_OPTIONS.h
1663    o cleanup testreport
1664    
1665    checkpoint51o_post
1666    o bringing AD-related verif's up to date with genmake2
1667      - carbon/
1668      - global_ocean.90x40x15/
1669      - hs.94.1x64x5/
1670      - (front_relax/ )
1671    o (more) consistent directory structure for AD-related verif.'s
1672    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1673    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1674    o bug fix in find_alpha.F for MDJWF:
1675      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1676        change rho -> rho-rhoConst
1677      - replace call find_rho to find_rhonum
1678    o initialisation of rFlx extended to full array (required by TAF)
1679      and shifted to thermodynamics
1680    o removed PTRACERS.h in ptracers routine
1681    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1682    o Correcting initialisations for fVerU, fVerV.
1683    o helping TAF to recognize dependency on kUp for
1684      fVerU, fVerV
1685    o Replacing delZ by delR in pkg/ctrl/
1686    checkpoint51o_pre
1687    
1688    o undid all of cp51 pending some cleanups and discussion
1689    o added the [#include "AD_CONFIG.h"] statement to all files that need
1690       it for adjoint/tl #defines
1691     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1692     o removed tools/genmake since it no longer works
1693    
1694    checkpoint51n_post
1695    o modifications to make FREEZE flux visible to pkg/kpp
1696      - moved surfaceTendencyTice from pkg/seaice to main code
1697      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1698      - subroutine FREEZE now limits only surface temperature
1699        (this means new output.txt for global_ocean.90x40x15,
1700         global_ocean.cs32x15, and global_with_exf)
1701    o added surface flux output variables to TIMEAVE_STATVARS
1702    
1703    checkpoint51n_pre
1704    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1705    o added [#include "AD_CONFIG.h"] to all files that use the following
1706      defines:
1707      - ALLOW_ADJOINT_RUN
1708      - ALLOW_TANGENTLINEAR_RUN
1709      - ALLOW_ECCO_OPTIMIZATION
1710    
1711    checkpoint51m_post
1712    o incorporating changes to get TAMC/TAF working in genmake2
1713      - added new TAMC/TAF targets to the Makefile
1714      - various cleanups related to package handling
1715      - these changes should have no impact on the forward model
1716    
1717    checkpoint51l_post
1718    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1719     - faster algorithm for cal_addtime.F
1720     - higher precision arithmetic, where needed
1721     - pkg/exf *startdate variables changed from calendar date to
1722       model integration time
1723    
1724    checkpoint51l_pre
1725    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1726    o enable to apply restoring on S & T only in a latitude band.
1727    o update output (external_forcing_surf modif. change truncation errors)
1728       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1729    
1730    checkpoint51k_post
1731    o change default to: useNHMTerms=.FALSE.
1732     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1733       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1734     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1735        exp1, ideal_2D_oce
1736     - change data file of oceanic exp (leave the results unchanged for now)
1737       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1738    o set gravitySign automatically according to the vertical coordinate used
1739      (and change sign: back to "logical" value: +1 when R increases downward)
1740    o added an include barrier to the default CPP_OPTIONS.h and
1741      removed the #include "PACKAGES_CONFIG.h" from it
1742    o fix a bug in mom_fluxform (from chk51j_post)
1743    
1744    checkpoint51j_post
1745    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1746    o adjusted some flow directives (dynamics, thermodynamics)
1747    o added cubed-sphere case to test cost function
1748    o heckpoint_lev?_directives.h now include
1749      pkg-specific directives, whenever those are enabled.
1750    o Moving pkg-specific flow directives to corresponding pkg
1751      Moving pkg-specific differentiation list to corresponding pkg
1752      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1753      ---> conventions are
1754           - pkg_ad.flow
1755           - pkg_ad_diff.list
1756           - pkg_ad_check_lev?_dir.h
1757    
1758    checkpoint51i_post
1759    o merge of the branch-genmake2
1760      - knowingly breaks the older genmake
1761      - automatic generation of all ALLOW_${PKG_NAME} defines
1762      - new testreport supersedes older testscript
1763    o large number of package inclusion and header cleanups
1764    checkpoint51i_pre
1765    
1766    o new output for adjoin of global ocean vector invariant
1767    o fix for checkpoint of thermodynamic seaice and bulk_force
1768    o Steph gchem various cleanups
1769    
1770    checkpoint 51h_pre
1771    o fixed some single quotes
1772    o modify gchem pkg to be more versatile
1773    o modifications to clean up dic pkg
1774    o add pkg/cfc
1775    
1776    checkpoint51g_post
1777    o provide links for ARPACK and ADM*TLM
1778    o start removing verification/vero/
1779    o update AD-related stuff
1780      (in particular some IF-statements in model/src/ routines)
1781    o adding to verification/global_ocean.90x40x15/ adjoint of
1782      vector invariant setup
1783    
1784    checkpoint51f_post
1785    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1786    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1787      of tracer Green's fucntions for ocean inversion project.
1788    
1789    checkpoint51f_pre
1790    o Added on-the-fly spatial interpolation capability
1791        "USE_EXF_INTERPOLATION" to pkg/exf.
1792      - This is a temporary Cartesian-grid hack until
1793        the super-duper ESMF coupler becomes available.
1794      - See verification/global_with_exf/README for usage example.
1795      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1796        flags and modified pkg/seaice accordingly.
1797    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1798        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1799        non-local transport term.
1800    
1801    checkpoint51e_post
1802    o pkg/mom_vecinv:
1803      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1804      - add time-ave diagnostic of vorticity advection.
1805    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1806    o atmospheric geopotential: - include water vapor effect;
1807                                - use p^kappa in p* scaling.
1808    o land pkg: read initial state from files.
1809    o AIM : add stratospheric drag in the upper level
1810    
1811    checkpoint51d_post
1812    o change function ILNBLNK (=> last non-blank char.) to return zero
1813      (instead of the string length) when the string. char is empty
1814    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1815    o modif's to restore TAMC compatibility
1816      - avoid "_d" constructs in PARAMETER declarations
1817      - avoid interrupting lines by comment lines
1818    o Use cluster local disks for purely local I/O
1819      vs. globally visible disks needed for ctrl stuff
1820      (merged from ecco-branch)
1821      - new active_file_loc... and mdsio_..._loc routines
1822      - affected packages: autodiff, ctrl, grdchk, mdsio
1823    
1824    checkpoint51c_post
1825    o introducing integer flag debugLevel
1826      - debLevZero: suppress all output
1827      - debLevA: standard
1828      - debLevB: equivalent to current debugMode=.TRUE.
1829    o introducing pathname variable mdsioLocalDir for mdsio
1830      that can be specified at runtime
1831      (relevant for cluster I/O to local disk)
1832    `
1833    >>>checkpoint51b_post
1834    adjoint of ptracers
1835    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1836    o extended state in checkpoint_lev?, etc.
1837    o alternative ctrl/cost with tr1 or ptracer
1838    o new comlev1_bibj_ptracers
1839    o new ptracers.flow
1840    o made ptracers_forcing same as external_forcing_s
1841    o added verification for adjoint with ptracers
1842      - adm. grdchk fail so far
1843      - tlm. grdchk OK
1844      - checked tapelev/comlev recomputations: OK
1845    <<<checkpoint51b_pre
1846    
1847    checkpoint51a_post
1848    o added code for biogeochemistry package
1849      - new pkgs: dic, gchem
1850      - new subroutine in ptracers
1851    o modify code for biogeo packages
1852      - in model/src and pkg/ptracers
1853    
1854    checkpoint51
1855    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1856      - autodiff, ctrl, exf, grdchk, seaice
1857      kept separate packages
1858      - cost, ecco, obcs
1859    o updating verification/internal_wave, verification/lab_sea
1860      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1861    
1862    checkpoint50i_post
1863    o Preparing next differentiable checkpoint and sync
1864      of MAIN vs. ecco-branch
1865      - 1st step: this one is differentiable
1866      - 2nd step: next(! not this) checkpoint will have updated packages
1867                  from ecco-branch)
1868    
1869    checkpoint50h_post
1870    o new package "land": provide surface BC for AIM.
1871    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1872    o AIM: use true log-P extrapolation for near surface temp (= as in
1873        F.Molteni paper) ; update aim.5l_cs output.
1874    o New variable in PARM03 for more flexible pickups
1875    o somewhat cleaned package initialisation sequence for
1876      ctrl/ cost/ ecco/ in packages_... routines
1877    
1878    checkpoint50g_post
1879    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1880      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1881      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1882        made the default because of faster convergence than ADI
1883    
1884    checkpoint50f_post
1885    o exf totally restructured
1886      - replaced all exf_set_ routines by one generic exf_set_gen.F
1887        and made sure it's still differentiable
1888      - split exf_getffields.F into new exf_bulkformulae.F
1889      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1890      - updated adjoint/makefile and relevant verif. accordingly
1891    
1892    checkpoint50f_pre
1893     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1894          + change Evap over land. (update aim.5l_cs output)
1895     o added missing .cvsignores and made uniform across expts
1896     o changed configuration of tidal_basin_2d expt
1897     o added pkg/debug functions for tracing code in fatal crashes
1898     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1899     o new fn in pkg/monitor to stop model if solution grows too big
1900     o removed lots of single quotes from comments
1901    
1902    checkpoint50e_post
1903    o make KPP work with PTRACERS
1904     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1905       nearly a copy of kpp_transport_s
1906     - there is no analogue to SurfaceTendencyS, so I have to use
1907       gPtr(of the surface layer) instead
1908    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1909    checkpoint50e_pre
1910    
1911    checkpoint50d_post
1912    o change kpp output from multiple-record state files to single-record state
1913      files analogous to write_state.F
1914    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1915      analogous to the cg2d-related output.
1916    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1917      so that writing to internal file fn (with length 512) fails.
1918    checkpoint50d_pre
1919    
1920    checkpoint50c_post
1921    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1922    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1923    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1924    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1925    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1926    
1927    checkpoint50c_pre
1928    Merging from release1_p13:
1929    o bug fix for pkg/seaice dynamic solver
1930    o Added SEAICE_initialHEFF to pkg/seaice
1931    
1932    checkpoint50b_post
1933    o store u*,v* in gU,V instead of in guNm1,gvNm1
1934    o in order to put the momForcing out of the Adams-Bashforth:
1935      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1936      to timestep.F
1937    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1938    o re-generate output for highly sensitive test-exp:
1939       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1940    
1941    checkpoint50b_pre
1942    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1943    o corrected CPP option mismatch in exf_Bulk... functions for case
1944      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1945    
1946    checkpoint50a_post
1947    o Bug fix for merging between c50 and KPP.
1948      ikey was passed from thermodynamics to kpp_calc via
1949      common block rather than being recomputed in kpp_calc,
1950      in contradiction with new key itdkey.
1951      New key ikppkey created, and tamc.h headers updated.
1952    
1953    checkpoint50
1954    - 2nd step of merge with ecco-branch:
1955      merge changes in ecco-branch back into main trunk
1956    - bug fix in find_alpha
1957    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1958    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1959    - merged some sliced AD support routines
1960    
1961    checkpoint49
1962    merged from ecco-branch:
1963    o exf:
1964      - Enable initialisation of forcing fields to constant
1965        (runtime) values.
1966      - in exf_getffields.F
1967        Reduce i-/j-loop to interior domain, discarding overlaps.
1968        That also fixes wrong TAF-key computations for key_1, key_2
1969        with bulf formulae.
1970      - exf_init.F modify #ifdef for exf_init_evap
1971      - exf_getffieldrec.F, ctrl_getrec.F
1972        The following INT-usages are not safe:
1973          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1974          fldcount = int(fldsecs/fldperiod) + 1
1975        and were modified.
1976    o autodiff: checkpoint_lev...
1977      - updated storing for bulk formulae (some arrays were missing)
1978      - added state for seaice package
1979      - synchronized with main branch
1980    o DIVA:
1981      Modif.s in
1982      - the_main_loop.F
1983      - the_model_main.F
1984      and added cost_final_restore.F cost_final_store.F
1985      o With these changes, it is possible to fully separate
1986        the first forward run to compute the cost function (mdthe_main_loop)
1987        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1988        into separate model executions.
1989        This enables better tuning of DIVA to given queue sizes.
1990      o Loss of cost function value in consecutive DIVA runs is
1991        fixed by storing to 'costfinal' file.
1992      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1993        beginning/end of adjoint integration is accounted for.
1994      The current changes apply to TAF-1.4.26.
1995      TAF has one remaining bug, requiring one manual change
1996      (see MITgcm manual).
1997    o cal: synchronized between MAIN and ecco-branch
1998    
1999    checkpoint48i_post
2000    o Changes to restore differentiability of code w.r.t. previous tag
2001      (mostly adding new routines to make list and replacing
2002      pressure by totPhiHyd).
2003    o Updated and merged grdchk package
2004      - has both ADM and TLM checks
2005      - works for single- and multi-proc.
2006      - output cleaned
2007      - worked successfully for parallel DIVA
2008    o genmake:
2009      - Adding -platform=SP4
2010      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2011    o Modif. for DIVA:
2012      ctrl_unpack should not be called in intermediate DIVA interval.
2013      (similar thing would apply for active files such as
2014      tbar, sbar, psbar, which should not be reinitialised;
2015      only relevant for ecco-branch)
2016    
2017    checkpoint48h_post
2018    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2019    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2020    o Added SEAICE_initialHEFF to pkg/seaice
2021    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2022    
2023    checkpoint48g_post
2024    --- EOS:
2025    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2026      store total Potential in totPhyHyd for diagnostics & EOS.
2027    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2028    --- Pressure/geopotential gradient:
2029    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2030    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2031      ( changes results of global_ocean_pressure )
2032    o NLFS + z-coord.: add eta*Rho' contribution.
2033    o accurate phiHyd when using interface-W at the middle between 2 centers
2034     ( changes results of ideal_2D_oce )
2035    o includes r* 2nd term in potential gradient.
2036    
2037    checkpoint48f_post
2038    Merging from release1_p12:
2039    o Modifications for using pkg/exf with pkg/seaice
2040      - improved description of the various forcing configurations
2041      - added basic radiation bulk formulae to pkg/exf
2042      - units/sign fix for evap computation in exf_getffields.F
2043      - updated verification/global_with_exf/results/output.txt
2044    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2045      (SBO) core products, including oceanic mass, center-of-mass,
2046      angular, and bottom pressure (see pkg/sbo/README.sbo).
2047    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2048      to avoid negative values in shallow regions.
2049      - updated verification/natl_box/results/output.txt
2050      - updated verification/lab_sea/results/output.txt
2051    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2052    o Added useSingleCpuIO option (see PARAMS.h).
2053    o Updated useSingleCpuIO option in mdsio_writefield.F to
2054      work with multi-field files, e.g., for single-file pickup.
2055    o pkg/seaice:
2056      - bug fix in growth.F: QNET for no shortwave case
2057      - added HeffFile for specifying initial sea-ice thickness
2058      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2059    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2060      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2061    o pkg/seaice:
2062      - adjoint-friendly modifications
2063      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2064    
2065    checkpoint48e_post
2066    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2067    o dynamics: change definition of computational domain & adapt mom_fluxform
2068      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2069    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2070        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2071        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2072        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2073        inverted_barometer solid-body.cs-32x32x1
2074      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2075    
2076    checkpoint48d_post
2077    o in preparation for r*:
2078     a) use pre-computed gradient of hydrostatic potential:
2079        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2080     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2081        => affects results of glob_oce_pressure (different truncation error)  
2082      update output.txt of ideal_2D_oce & global_ocean_pressure
2083    
2084    checkpoint48d_pre
2085    o in preparation for r*:
2086      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2087      pass the 2 comp. of the grad. as arguments to momentum S/R.
2088      but for the moment, only used if it does not change the results.
2089    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2090    
2091    checkpoint48c_post
2092    Modifications in treatment of initial flux forcing controls
2093    to avoid extra storing of flux fields.
2094    
2095    checkpoint48c_pre
2096    o Added tidal_basin_2d experiment (currently 1D!)
2097    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2098    
2099    checkpoint48b_post
2100    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2101     (modification to pressure gradient not yet implemented)
2102    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2103      (for U & V) that are used for vertical advection of momentum.
2104    
2105    checkpoint48a_post
2106    o In preparation for r*, use temp. array to compute vertical transport
2107       in flux-form momentum pkg. => change results of few test-exp.
2108      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2109                        lab_sea, natl_box & plume_on_slope
2110    
2111    checkpoint48
2112    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2113    
2114    checkpoint47j_post
2115    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2116    o moved adexch from forward_step to addummy_in_stepping
2117    o added exch in ctrl_map_...
2118    o aveFreq.=0. at end of cost_final to avoid overwrite in
2119      reverse checkpointing loop
2120    o Yet more changes in gmredi:
2121      * adgmredi_calc_tensor
2122        avoiding all recomputation of gmredi_slope_limit
2123      * adgmredi_x/y/rtransport
2124        added flag for excessive storing to avoid recomp. of
2125        u/v/rtans, dTdx/y/z
2126        -> this is not really necessary and very memory-consuming
2127      * adgmredi_slope_psi:
2128        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2129      * gmredi_slope_limit
2130        re-activated full calculation of taperfct for case 'ac02'
2131    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2132    
2133    checkpoint47i_post
2134    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2135    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2136      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2137    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2138    o gmredi: fix few bugs.
2139    
2140    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2141    This will be a good checkpoint to plug into the ecco-branch.
2142    o few modif.'s to get latest version adjointed
2143      (mainly kick out code in ini_linear_phisurf)
2144    o modif's to run adjoint with exactConserv
2145    o case GM_BOLUS_ADVEC should be cleaned
2146      S/R gmredi_slope_psi should be cleaned
2147    o verification/carbon now has exactConserv=.TRUE.
2148    
2149    checkpoint47g_post
2150    o time-average AIM output: becomes independent from statvars time-average
2151      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2152    o After TAF bug fix:
2153      Tested adjoint of gmredi package.
2154      Tests were done with checkpoint47 rather than with latest
2155      checkpoint47f_post since the latter is broken for the adjoint
2156      verification/carbon/ contains both ADM and TLM gradient checks.
2157    Here they are, before they get changed/lost/stolen.
2158    Mostly modif.'s to fix numerical sensitivities.
2159    Gradient checks OK for
2160    - GM_taper_scheme:
2161      * clipping
2162      * ac02
2163      * linear
2164      * glw91
2165      * dm95
2166      * ldd97
2167    - GMREDI_OPTIONS:
2168      * GM_VISBECK_VARIABLE_K
2169      * GM_NON_UNITY_DIAGONAL
2170      * GM_EXTRA_DIAGONAL
2171      * GM_BOLUS_ADVEC
2172    in conjunction with data.gmredi parameters to be checked in
2173    in a few minutes under verification/carbon/code/
2174    
2175    checkpoint47f_post
2176    Merging from release1_p10:
2177    o modifications for using pkg/exf with pkg/seaice
2178      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2179        and SEAICE_EXTERNAL_FLUXES
2180      - pkg/exf CPP options EXF_READ_EVAP and
2181        EXF_NO_BULK_COMPUTATIONS
2182      - usage examples are Experiments 8 and 9 in
2183        verification/lab_sea/README
2184      - verification/lab_sea default experiment now uses
2185        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2186    
2187    checkpoint47e_post
2188    o created a tag prior to creating a branch
2189    
2190    checkpoint47d_post
2191    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2192      at the bottom boundary had an erroneous half slip boundary condition
2193    o added bottom drag and no slip boundary condition capabilities to
2194      oceanic pressure coordinates code
2195    o added new verification experiment global_ocean_pressure, this experiment is
2196      also described in the tutorial section of the manual
2197    checkpoint47d_pre
2198    
2199    checkpoint47c_post
2200    o Added a verification experiment for a global cubed-sphere ocean run
2201      -  verification/global_ocean.cubed32x32x30
2202      -  uses pkg/therm_seaice and pkg/bulk_forcing
2203    
2204    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2205    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2206      when using P-coordinate; only implemented for atmospheric config.
2207    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2208      NOTES: requires option NONLIN_FRSURF to be "#define".
2209    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2210    
2211    checkpoint47b_post
2212    Merging from release1_p9:
2213    o pkg/seaice
2214      - removed GOTO's and added taf directives
2215      - double precision constants to reduce the g77 (Linux)
2216        to F77 (SGI) differences reported in release1_p8
2217    o tools/genmake
2218      - added SGI options
2219    o verification/testscript
2220      - updated to that of checkpoint47a_post
2221    o verification/global_ocean.90x40x15/input/eedata
2222      - modified for SGI f77 compatibility
2223    o verification/lab_sea
2224      - added description of sea-ice model
2225      - added missing matlab routines
2226      - added test of thermodynamics parallelization
2227    
2228    checkpoint47a_post
2229    o new pkg: aim_v23
2230     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2231       for now, keep the same surface forcing as before.
2232     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2233     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2234     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2235    o add diagnostic of surface correction term in monitor output
2236    
2237    o bulk_force and therm_seaice
2238    - Two packages:  bulk_force (Bulk forcing)
2239      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2240    - Earlier integration from Stephaine Dutkiewicz
2241      and Patrick Heimbach.
2242    - Two ifdef statements for compile time,
2243       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2244    
2245    checkpoint47
2246    differentiable version of checkpoint46n_post
2247    o bug fix in quasihydrostaticterms
2248    o * "clean" adjoint code (in terms of extensive recomputations)
2249        can now be obtained for all GMREDI options (i.e. for
2250        - GM_VISBECK_VARIABLE_K
2251        - GM_NON_UNITY_DIAGONAL
2252        - GM_EXTRA_DIAGONAL
2253        - GM_BOLUS_ADVEC )
2254      * However, wrong gradient check problem remains unsolved.
2255      * New CPP options have been introduced for different
2256        tapering schemes
2257    o external_fields_load now part of differentiation list
2258    o pressure needs multiple storing;
2259      would be nice to have store_pressure at beginning or
2260      end of forward_step, e.g. by having phiHyd global (5-dim.)
2261      (NB: pressure is needed for certain cases in find_rho,
2262      which is also invoked through convective_adjustment).
2263    o recomputations in find_rho for cases
2264     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2265    o #define ATMOSPHERIC_LOADING should be differentiable
2266    o ini_forcing shifted to begining of initialise_varia
2267    o Incorporating QNVS line search routines into MITgcm
2268      (this is separate code, and therefore not under pkg)
2269      lsopt/, optim/
2270    o Updated verification/carbon/
2271      - #define GM_VISBECK_VARIABLE_K
2272      - GM_taper_scheme    = 'ldd97'    
2273    
2274    checkpoint46n_post
2275    Merging from release1_p8:
2276    o verification/natl_box:
2277      updating new external_fields_load routine
2278    o New package: pkg/seaice
2279      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2280      The sea-ice code is based on Hibler (1979-1980).
2281      Two sea-ice dynamic solvers, ADI and LSR, are included.
2282      In addition to computing prognostic sea-ice variables and diagnosing
2283      the forcing/external data fields that drive the ocean model,
2284      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2285      The implied surface heat flux is then stored in variable
2286      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2287      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2288      non-local transport term.  Because this call precedes model
2289      thermodynamics, temperature under sea-ice may not be "exactly" at
2290      the freezing point by the time theta is dumped or time-averaged.
2291      N.B.: fairly large differences in accuracy occur across
2292            different platforms/compilers; comparison between
2293            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2294            generated output gives:
2295       T           S           U           V
2296      C D M    c        m  s        m  s        m  s        m  s
2297      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2298      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2299      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2300    
2301      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2302    o GAD:
2303      - generated new common blocks to account for call of
2304        same gad routines with differing traceridentities
2305        (needed to modify tracerIdentity indices in GAD.h)
2306      - generated separate common blocks for case useCubedSphereExchange
2307        (Department of Futurology)
2308      - parameter lists to gmredi_?transport: added tracerIdentity
2309      - added new key indices to tamc.h
2310    o external_fields_load:
2311      - added this routine to TAF list
2312      - needed to make some common blocks global and additional storing
2313        along the same lines as exf package (checkpoint_lev?_directives.h)
2314    o exf:
2315      updated external forcing package
2316      - bug fixes carried over from ecco-branch
2317        (missing OBCS_OPTIONS.h in two routines)
2318      - enable easy to use "no forcing".
2319      - added exf I/O for atmospheric loading
2320      - added exf I/O for runoff data
2321      - transfered scaling between exf <-> MITgcm to exf namelist
2322    o Adding new verification experiment global_with_exf.
2323      This verification experiment is almost identical to the
2324      global_ocean.90x40x15 experiment, except that it uses
2325      the exf (and cal) package instead of the
2326      external_fields_load routine (cf README file).
2327    
2328    checkpoint46m_post
2329    o modified testscript to return -- when there are no lines of "%MON" output
2330    o added new flag "quasiHydrostatic" for QH mode
2331      and new routine quasihydrostaticterms()
2332    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2333      New routine: mom_u_coriolis_nh()
2334    o fixed sign of non-hydrostatic metric terms in u and v equations.
2335      Depend on correct sign of gravitySign.
2336    o added work.pc* to .cvsignore in aim directories using ifc
2337    o introduced flag for controllin non-hydrostatic metric terms
2338    o removed gravitySign from PARM04
2339    o switched to g77/ifc from pgf77 in aim experiments
2340    
2341    checkpoint46l_post
2342    o made convective adjustment work with pressure coordinates:
2343     - changed the direction of k-loop in convective_adjustment.F for the
2344       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2345     - adjusted the reference pressure k-index in convective_adjustment.F
2346     - adjusted the convection condition in convect.F (in analogy to
2347       calc_ivdc.F)
2348     - convective_adjustment no longer computes anything on the halos
2349     - removed the warnings about negative salinity from find_rho.F and
2350       find_alpha.F; instead the new routine look_for_neg_salinity, called
2351       at the beginning of find_rho, find_alpha, and find_beta, does a
2352       check of the entire slice, if CPP-option
2353       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2354    checkpoint46l_pre
2355    
2356    checkpoint46k_post
2357    o fixed the verification/global_ocean.90x40x15 experiment:
2358     - new bathymetry (the world according to A., JMC, and M.)
2359     - new initial fields and forcing fields (*.bin files)
2360     - new POLY3.COEFFS (for the next release one should switch to a full
2361       equation of state: JMD95P or MDJWF)
2362     - fixed several errors and redundancies in the data file
2363     - experiment uses looped cells
2364     - added matlab directory with diagnostic scripts for plotting of output
2365    
2366    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2367     - read AIM physics parameters from a file (data.aimphys)
2368     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2369    
2370    checkpoint46j_post
2371    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2372    o move wVel computation at the end of the time step, in S/R integr_continuity
2373    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2374    o update timeave pkg for wVel diagnostic.
2375    checkpoint46j_pre
2376    
2377    checkpoint46i_post
2378    o Clean up AIM package (and keep the results unchanged):
2379      include CPP_OPTION and use IMPLICT NONE in all routines ;
2380      declare all the variables _RL ; use _d 0 for all numerical constants.
2381      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2382    
2383    checkpoint46h_post
2384    o cleaned up the use of rhoNil and rhoConst.
2385      - rhoNil should only appear in the LINEAR equation of state, everywhere
2386        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2387        and the dynamical equations are all divided by rhoConst
2388    o introduced new parameter rhoConstFresh, a reference density of fresh
2389      water, to remove the fresh water flux's dependence on rhoNil. The default
2390      value is 999.8 kg/m^3
2391    o cleanup up external_forcing.F and external_forcing_surf.F
2392      - can now be used by both OCEANIC and OCEANICP
2393    checkpoint46h_pre
2394    
2395     Added code to convert surface volume flux (fresh water) into
2396     a mass flux when using P coordinates in the ocean (OCEANICP).
2397     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2398    
2399    checkpoint46g_post
2400    o Include a new diagnostic variable phiHydLow for the ocean model
2401      - in z-coordinates, it is the bottom pressure anomaly
2402      - in p-coordinates, it is the sea surface elevation
2403      - in both cases, these variable have global drift, reflecting the mass
2404        drift in z-coordinates and the volume drift in p-coordinates
2405      - included time averaging for phiHydLow, be aware of the drift!
2406    o depth-dependent computation of Bo_surf for pressure coordinates
2407      in the ocean (buoyancyRelation='OCEANICP')
2408      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2409        Theta, Salinity, and Pressure in the parameter list. This routine is
2410        presently contained in find_rho.F. This routine does not give the
2411        correct density for 'POLY3', which would be a z-dependent reference
2412        density.
2413    o cleaned up find_rho
2414      - removed obsolete 'eqn' from the parameter list.
2415    o added two new verification experiments: gop and goz
2416      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2417    checkpoint46g_pre
2418    
2419    checkpoint46f_post
2420    o Enable tangent linear (forward mode) gradient checks:
2421      - extended active file handling to g_... files
2422      - added TANGENT_SIMULATION to theSimulationMode
2423      - extended grdchk package accordingly
2424    o added tangent linear setup in verification/carbon/code_ftl
2425    o added adjoint setup in verification/front_relax/code_ad
2426    
2427    checkpoint46e_post
2428    o Added new equation of state -> MDJWF
2429      - EOS of McDougall et al., 2002, JAOT, submitted
2430      - caveat: the equation of state is only valid for a smaller (more
2431        realistic?) range of values than JMD95P/Z and UNESCO
2432      - added masks to the calculation of pressure in store_pressure
2433      - added more check values for density in check_eos (ini_eos.F), some of
2434        the old check values are out of the range of the MDJWF-eos, so don't
2435        expect perfect matches for those
2436    checkpoint46e_pre
2437    
2438    checkpoint46d_post
2439    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2440      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2441      case of pressure coordinates. eosType='JMD95Z' in
2442      combination with buoyancyRelation='OCEANICP' now causes an error.
2443    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2444      in find_alpha/beta.
2445    checkpoint46d_pre
2446    
2447    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2448      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2449    
2450    checkpoint46c_post
2451    o Changes necessary for ocean in p-coordinates
2452     -  Added new buoyancy relation = 'OCEANICP'
2453     -  Added new parameters = gravitySign (this used to be contained inside
2454        the factor dRdZ which I added when we first switched to R coordinates).
2455     X GM/Redi is not compatible (yet)
2456     X bottom drag and no-slip need to be debugged.
2457    checkpoint46c_pre
2458    
2459    checkpoint46b_post
2460    o Added new equation of state -> JMD95Z and JMD95P
2461      - EOS of Jackett and McDougall, 1995, JAOT
2462      - moved all EOS parameters into EOS.h
2463      - new routines ini_eos.F, store_pressure.F
2464    o Added UNESCO EOS, but not recommended because it requires
2465      in-situ temperature (see JMD95)
2466    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2467      unesco.f to be used with POLY3
2468    checkpoint46b_pre
2469    
2470    checkpoint46a_post
2471    o Added (atmospheric) pressure loading
2472      - new field in FFIELDS.h, etc...
2473      - new cpp flag ATMOSPHERIC_LOADING
2474    o Changed hFacC to _hFacC in calc_phi_hyd.F
2475    o Added SHORTWAVE_HEATING to some files for consistency
2476    checkpoint46a_pre
2477    
2478    checkpoint46
2479    further merges from release1_p5
2480    o new ctrl package
2481      - adopted from ECCO environment to enable optimization
2482      - added Eliassen Palm fluxes to controls
2483    o added Eliassen Palm flux controls to gradient check package
2484    o cost package
2485      - Compatible with new ctrl package
2486      - added Eliassen Palm cost hooks
2487      - modif's of existing cost functions
2488    o Adjoint-related bug fixes in kpp:
2489      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2490      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2491    o autodiff package
2492      - flow directives:
2493        + new for S/R do_the_model_io
2494        + enhanced for S/R checkpoint
2495        + new gmredi.flow
2496      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2497        disable adcommon.h/g_common.h by default.
2498      - fixed problem for adjoint of global_max
2499    o modified verification/carbon/
2500    o New setup for adjoint of global_ocean
2501    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2502    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2503    o incorporated hooks for sponge layer code (external_forcing.F)
2504    
2505    checkpoint45d_post
2506    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2507    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2508      (affects plume_on_slope "cg2d" output)
2509    o add new parameter deltaTfreesurf for free-surface time stepping
2510    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2511    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2512    o change phiMin in exp1 (to agree with documentation)
2513    o add new flags:
2514     - T,S forcing inside/outside Adams-Bashforth
2515     - turn off temp,salt advection and/or forcing
2516     - for each tracer, define internal flag for multiDimAdvection & A-B
2517    o monitor: change definition of KE to check conservation of Energy
2518    
2519    checkpoint45c_post
2520    o Removed f90 comments ("!")
2521    o Modified initialisations to enable exf package for MITgcm
2522      (without invoking ECCO_PACKAGE).
2523    o modifications to gradient check package (Martin Losch)
2524      - enable centered differences
2525      - modified format of standard output
2526    
2527    checkpoint45b_post
2528    o cleaned exchange calls in cg2d
2529    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2530    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2531      to configure barotropic setup (Martin Losch)
2532    o moved some initialisations within bi,bj loop in dynamics
2533      (TAF flow dependency)
2534    o in initialise_varia, moved call packages_init_variables
2535      before convective_adjustment_init
2536      (corresponding adjustment of TAF tape initialisation).
2537    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2538    
2539    checkpoint45a_post
2540    o compute Rho over the whole domain (extend iMin,jMin indices)
2541    o specific exchange for X-slice domain (case Ny=1)
2542    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2543    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2544    
2545    checkpoint44h_post = checkpoint45
2546    o Fix to restore differentiability:
2547      place at which packages_init_variables is called in
2548      initialise_varia is crucial for reverse control flow.
2549    o modifications in GMRedi to enable stable adjoint
2550      (corresponding modif's in thermodynamics, dynamics)
2551    o added missing hook for sponge layer code in external_forcing
2552    o modified test cost functions
2553    o storing in gad_advection (plus removal of write(0,*)!
2554    o missing headers TR1.h added in convective_adjustment routines
2555    o errorMessageUnit set non-equal zero in eeboot
2556      (conflict on some platforms, e.g. IBM SP3)
2557    o modified carbon verif.
2558    
2559    checkpoint44h_pre
2560    o vertical grid option: allow to put the Interface at the middle between
2561      2 cell-centers ; replace delZ in pkg/kpp by drF.
2562    o GM Advective form: Tracers are advected using the residual transport (=
2563      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2564    
2565    checkpoint44g_post
2566    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2567      results) ; ifdef missing in thermodynamics.F
2568    
2569    checkpoint44f_pre,checkpoint44f_post
2570    o added PTRACERS package
2571      This allows an arbitrary number of passive tracers to be integrated
2572      forward simultaneously with the dynamicaly model.
2573      + Implemented so far:
2574        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2575        - I/O and checkpointing
2576        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2577      + Not implemented so far:
2578        - KPP
2579        - OBCS
2580      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2581        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2582        line in data.pkg.
2583      + This package is disabled by default since it increases storage.
2584    
2585    
2586    o testscript: added -cleanup option
2587    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2588                 b) enable to filter 2D fields.
2589    
2590    checkpoint44e_pre,post
2591    o re-wrote convective adjustment to use pre-calculated weights
2592      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2593      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2594      Original calls to convect() still in place.
2595    
2596    chkpt44d_pre,post
2597    o added missing EXCLUDE_MONITOR flags
2598    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2599      (incompatible typ in MIN/MAX expressions caused problems
2600      on IBM SP3)
2601    o in genmake added variable MAKEDEPEND
2602      plus resetting for case SunOS
2603    o added timer_stats.c routine for IBM SP3
2604    o removed variables in dynamics
2605    !!! I forgot to create tag chkpt44d_pre !!!
2606    !!! But chkpt44d_pre = chkpt44c_post    !!!
2607    
2608    o real fresh water flux implemented with non-linear free-surface.
2609    
2610    chkpt44c_pre,post
2611    o few fix (mask in shap_s2, EmPmR in external_field_load,
2612      USE_NATURAL_BCS in solve_for_P);
2613    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2614    
2615    checkpoint44b_pre/_post
2616    o merge of relevant stuff from the ecco-branch:
2617      - genmake: removed $S64 overwrite for case SunOS
2618      - pkg/exf: update and corrections for field swapping and obcs
2619      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2620                  harmonized between ECCO and MITgcm
2621      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2622                      updated checkpointing_lev... lists for obcs
2623      - model/src: minor changes in forward_step, plot_field
2624                   added directive for divided adjoint in the_main_loop
2625      - pkg/mdsio: added mdsio_gl_slice
2626    
2627    o check parameters & config (chkpt44a_pre,post)
2628    o OBC and NonLin_FrSurf.
2629    
2630    checkpoint44
2631    o fix bug in mom_vi_del2uv
2632    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2633    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2634    o update AIM experiments (NCEP input files)
2635    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2636    o added some stuff for AD
2637    
2638    checkpoint43
2639    o added two new advection tests
2640    o added global 4x4 degree ocean test
2641    o added test of H&S94 with free surface on cube
2642    o some final mods for gradient check, adjoint,...
2643    
2644    checkpoint42
2645      Fixed AD-related problems:
2646    o Store directives up-to-date with re-arranged Adams-Bashforth
2647      (mainly thermodynamics.F)
2648    o New store directives for multi-dim. advection schemes
2649      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2650      * new common block and key passkey
2651      (mainly gad_advection.F)
2652    o Modified store directives for split of dynamics/thermodynamics
2653      for the case ALLOW_KPP
2654    o Cleaned argument list for timestep_tracer.F
2655    
2656    checkpoint41
2657    o re-formatted/added comments in prologues of key subroutines
2658      to work with protex
2659    
2660    checkpoint40
2661    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2662    o added FLT (floats) package from Arne along with demo. experiment
2663    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2664      implementation of forward-in-time forcing terms
2665    o more mods for non-linear free-surface including new variable
2666    o modified multi-dim method to work on cube
2667    o bug fix in KPP (from DM)
2668    
2669    checkpoint40pre9
2670    o added DST advection schemes
2671    o fix MPI bug on SGI's
2672    o modifications for non-linear free-surface
2673    o fixed conditionals for fixed flow/passive tracer only mode
2674    o added tension/strain form of stress tensor
2675    o changes to commenting of arguments for TAF/TAMC
2676    o added/updated many matlab scripts
2677    o added multi-dimensional advection method for tracers
2678      
2679    checkpoint40pre8
2680    o new package rw/
2681      Added method for dumping intermediate local arrays:
2682      mdsio_writetile - same as mdsio_writefield except works from inside
2683                        bi,bj loop
2684      mdsio_writelocal - same as mdsio_writetile except works for local
2685                         arrays
2686      write_local_r? - higher-level wrapper for mdsio_writelocal
2687      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2688      Example given at end of mom_vecinv.F that dumps some local arrays.
2689    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2690      control flux-form versus vector invariant code.
2691      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2692      or genmake -DISABLE ...
2693    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2694      (additional storing is now needed for case vecinv;
2695      currently nothing implemented to switch this storing off
2696      in case fluxform is used since no CPP flag available).
2697    
2698    checkpoint40pre7
2699    o bug fix in dynamics.F
2700      calc_viscosity called before k=1,Nr loop.
2701    o added some #ifdef's ALLOW_PASSIVE_TRACER
2702    o cleaned initialisations in ctrl_map_ini
2703      related to TAF
2704    
2705    checkpoint40pre6
2706    o split dynamics into thermodynamics & dynamics
2707    o corresponding split of calc_diffusivity into
2708      calc_diffusivity, calc_viscosity
2709      (kpp_calc_diff, kpp_calc_visc).
2710    o Added diffkr, kapgm to control variables
2711    o bug fix in gmredi_slope_limit for ldd97
2712    
2713    checkpoint40pre5
2714    o proper initialization of Adams-Bashforth time stepping
2715      + uses forward step for very first step of model (iter=0)
2716    o re-generated *all* output since almost all output is modified by this
2717      change (sorry but we've been putting this one off for about 2 years)
2718      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2719        *not* regenerated since they are already out of date and I don't
2720        want to create the impression that they are suddenly working.
2721    o removed KAP stuff for DEC's
2722    o modified/added many .cvsignore files in */code and */input
2723    o added new expt "solid-body.cs-32x32x1"
2724      + this uses an alternative form of ini_curvilinear_grid.F which
2725        is not necessarily any better than the current one...
2726    
2727    checkpoint40pre4
2728    o added re-initialisations of utrans,vtrans,rtrans in
2729      calc_common_factors which are crucial for TAF.
2730    o extended iMin,jMin range for calc_common_factors,
2731      calc_diffusivity
2732    o added option ALLOW_PASSIVE_TRACER
2733    o a few minor updates and fixes
2734    
2735    checkpoint40pre3
2736    o created calc_gtr1.F for gad package
2737    o split the_main_loop and re-introduced forward_step
2738    o some recomputations of nIter0 for TAMC
2739    
2740    checkpoint40pre2
2741    o Updated to latest branch of AJA, JMC
2742    o Added gradient check package
2743    o Added routines for passive tracer handling
2744    o Added carbon sequestration sensitivity experiment
2745    
2746    checkpoint39
2747     o Modifications and fixes to support TAMC
2748       (mainly missing or wrong directives)
2749     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2750       in addummy_in_stepping
2751     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2752     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2753     o Included following packages:
2754       cal: calendar
2755       exf: external forcing
2756       ecco: essential routines to control use of cal, exf
2757             (NB: this is not the full ECCO environment)
2758     o disabled some packages by default in genmake
2759    
2760    checkpoint38
2761     o see notes_c37_adj.txt
2762     o corrected wrong layer index in external_forcing_t
2763     o replaced the_main_loop/forward_step by the_main_loop
2764     o removed forceoutput from write_state
2765       (replaced criteria for initial/final state)
2766     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2767    
2768    checkpoint37
2769     o mdsio.F routine split and packaged in pkg/mdsio
2770       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2771        used unless genmake -disable=mdsio)
2772     o allow a more precise surface-geopotential gradient for the atmosphere
2773       taking into account the change in space of Alpha (=1/rho) at the surface.
2774     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2775       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2776     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2777       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2778       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2779     o Time-Average diagnostics defined as a pseudo package "timeave".
2780     o pickup files : old pickup (before c35) did not work with new code (c35
2781       and after) unless activating 2 commented lines in initialise-varia.
2782     o Non-Hydrostatic pickup file Pb fixed.
2783     o bug with Rigid-lid version (since c35) fixed.  
2784    
2785    checkpoint36
2786     o implement Crank-Nickelson barotropic time-stepping
2787     o recover Time-Average diagnostics
2788     o fix Pb in checkpoint (PR#19)
2789     o AIM become a standard package ; clean unused CPP_kees
2790    
2791    checkpoint35
2792     o subtantial rewrite of dynamics.f
2793     o allows staggered time-stepping
2794     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2795     o added bottom drag (linear + quadratic)
2796    
2797    checkpoint34
2798     o Modified exchange routines for correct reverse simulation.
2799     o Added verification output to comply with bug fix in impldiff.F
2800       as of c33 (exp2, natl_box).
2801     o Corrected store directives in dynamics.F
2802     o Corrected array boundaries in impldiff.F
2803     o Corrected array dimensions in gmredi.
2804       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2805     o Added routine GLOBAL_SUM_INT to global_sum.F
2806     o Added mdsio_gl.F for ECCO purposes.
2807    
2808    checkpoint33
2809     o Fixed bug in lower BC in impldiff.F
2810     o Fixed confusion about units of forcing arrays in FFIELDS.h
2811       namely Fu,Fv,Qnet,Qsw,EmPmR:
2812       - Removed verification/natl_box/code/external_fields_scale.F
2813         (did not differ from that in model/src)
2814       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2815         (see FFIELDS.h for description)
2816       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2817         kpp_calc.F and kpp_transport_t.F
2818       - Removed model/src/external_fields_scale.F and calls to it
2819       - verification/natl_box uses flux data with "atmospheric" sign so
2820         a special version of external_fields_load.F is used to
2821         change the data as it's read in. This way, the arrays
2822         have the right units and signs at all times tha a user could
2823         possibly use them.
2824     o Corrected genmake to delete a temporary file during configuration
2825    
2826    checkpoint32
2827     o Scaling of forcing fields moved from external_forcing.F to
2828       external_fields_scale.F, called directly after loading fields.
2829     o Surface relaxation terms added to surface tendency fields in
2830       extra subroutine.
2831     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2832       fields.
2833     o Changes in GMRedi to comply with packaging structure.
2834     o Modifications and bug fixes in KPP package.
2835     o Verification experiment for KPP added (verification/nat_box/)
2836    
2837    checkpoint31
2838     o Packages interface brought in line with defined standard
2839       -> new routines packages_...F
2840       -> changes in initialise_fixed.F, initialise_varia.F
2841       -> enables initialisation interface for ECCO package
2842     o Rescaling of external forcing fields immediately after read
2843       (removed from external_forcing.F)
2844       -> new: surface_fields_scale.F
2845       -> affects ini_foorcing.F, external_fields_load.F
2846     o Computation of surface tendencies before tendency updates.
2847       -> new: external_forcing_surf.F
2848     o Change of variable names useGMRedi, useKPP, useECCO
2849     o Further changes in dynamics.F, impldiff.F for TAMC
2850     o Tested for experiments 0, 2, 4.
2851       - not yet tested for GMRedi.
2852       - not yet tested for KPP.
2853    
2854    checkpoint30
2855     o Updates for OBCs
2856     o New experiment for test OBCs (internal_wave)
2857     o New output.txt in verification/exp4/results/
2858     o Updates for KPP: calculation of viscosity corrected, new variables
2859       kpp_dumpFreq and kpp_taveFreq
2860     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2861       and entry for T90 in genmake
2862    
2863    checkpoint29
2864     o packaged KPP and GM/Redi
2865    
2866    checkpoint28
2867     o Corrected initialization of hFacMin for difference vertical coordinates
2868     o Modified calculation of partial cell thickness to more robust algorithm
2869     o config_summary.F: replaced write_1D_... by write_0D_...
2870       read_write.F: added subroutines write_0D_...
2871     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2872       included some initialisations required for TAMC.
2873     o routine calc_isoslopes: modified sqrt computation to make it
2874       differentiable for zero argument.
2875     o routines dynamics, impldiff:
2876       included store directives and tape key computations required for TAMC.
2877     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2878    
2879    checkpoint27
2880     o fixed calc_isoslopes() to so that cancellation of terms in tensor
2881       formulation works properly with variable resolution.
2882     o restructured the calling tree between the_model_main() and dynamics()
2883     o split initialise() into initialise_fixed() and initialise_varia()
2884     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
2885       in new routine ini_psurf()
2886    
2887    checkpoint26
2888     o moved some #ifdef in optional routines to encompass everything
2889       except the argument declarations. This was using up some memory.
2890     o fixed macros like _ADT to work with both versions of Linux cpp
2891     o cleaned up some unused and uninitialized variables
2892       (helps when debugging with strict compile options)
2893     o split up CPP_EEOPTIONS.h into options and macros
2894       (macros are now in eesupp/inc/CPP_EEMACROS.h)
2895     o patch for 2 processor JAM mode
2896    
2897    checkpoint25
2898     o updates for OBCs and NH
2899     o dramatically reduced memory usage
2900     o added "JAM" routines for use on Artic network
2901     o parameterization of convection by implicit vertical diffusion
2902     o added a diagnostic of convective index
2903     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
2904       (this is was partly for OBCs and NH but also in anticipation of
2905        an explicit free-surface option)
2906     o initial state input files for U and V
2907    
2908    checkpoint24
2909     o Removed some spurious "REAL"s
2910     o Updated KPP to latest version from JPL
2911     o Added a COS(latitude) in horizontal viscosity
2912    
2913    checkpoint23
2914     o Added del^4 diffusion for salt and temperature
2915     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2916    
2917    checkpoint22
2918     o Made many small changes: implicit none, format(i5), etc...
2919     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2920    
2921    checkpoint21
2922     o Introduced new I/O package that supports direct-access records (mdsio.F)
2923     o Split-up mid-level I/O routines
2924     o Updated input data for experiments 0,1,2,4 and 5
2925     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2926    
2927    checkpoint20
2928     o Tidied up open-boundaries some more
2929     o Added non-hydrostatic code
2930     o Fixed some input data
2931     o Modified MPI start-up to work in "coupled" context.
2932    
2933    checkpoint19
2934     o Tidied up directory structure for verification experiments.
2935     o Added new code for open boundaries.
2936     o Corrected advective terms near boundaries.
2937     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2938     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2939     o Split default parameters out of ini_parms.F into set_defaults.F.
2940    
2941    checkpoint18
2942     o Further changes for optional code generation with
2943       CPP - ugh!
2944    
2945    checkpoint17
2946     o Beginning to incorporating modularity
2947       for supporting atmos. and ocean configs.
2948     o Small changes for TAMC complinace
2949     o New ultra simple test case. Barotropic box
2950       configuration "exp0".
2951    
2952    checkpoint16
2953     o Minor changes to exchange routines to support
2954       accumulation in reverse mode. Adjoint of an
2955       assignment is an addition.
2956     o Changes to support compilation by TAMC (LR(1)
2957       syntax) and by g77 under Linux ( 72 character
2958       limit ).
2959    
2960  checkpoint15  checkpoint15
2961   Rewrote exchange routines to allow   Rewrote exchange routines to allow
2962   o General tile <-> tile connectivity.   o General tile <-> tile connectivity.

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