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revision 1.8 by adcroft, Wed Jul 1 22:49:29 1998 UTC revision 1.683 by jmc, Mon Jun 19 15:56:42 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 pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
8    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
9       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
10    o tracer advection:
11     - clean-up and simplify calc_common_factors.F
12     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
13       advection subroutine (but still not used within DST advection S/R)
14    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
15    
16    checkpoint58j_post
17    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
18      from file (collects calls previously in FORWARD_STEP)
19    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
20    o adjoint store dir. adjusted accordingly
21    o genmake2
22      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
23    
24    checkpoint58i_post
25    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
26      on wind stress (SEAICEstressFactor defaults to 1.)
27    o Total number of Timers is finite (<=40): comment out 2 non-essential one
28      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
29    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
30      on CS-grid: no longer loosing mass.
31    o exf & curvilinear-grid: no longer modify longitude xC & xG.
32    o pkg/ggl90: fix sloppy output and fix a bug
33    o pkg/seaice: added SEAICEuseEVPpickup parameter
34      - Set to false in order to start EVP solver with
35        non-EVP pickup files when using SEAICEuseEVP
36      - fix sign error in diffusion in seaice_calc_rhs
37    
38    checkpoint58h_post
39    * Modifications for bottom topography control
40      o replace hFacC by _hFacC at various places
41      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
42      o add non-self-adjoint cg2d_nsa
43      o update autodiff support routines
44      o re-initialise hfac after ctrl_depth_ini
45      o works for 5x5 box, doesnt work for global_ocean.90x40x15
46    * Adding verification for 5x5 box (4-layer) bottom topography control
47    
48    checkpoint58g_post
49    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
50       used for mean seasonal cycle, mean diurnal cycle); add an example
51       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
52    o pkg/ggl90:
53      - add parameter (minimum surface kinetic energy)
54      - fix bug (avoiding division by zero)
55    o couple pkg/thsice to pkg/seaice:
56      - modify advection in seaice to accomodate new scalar fields to be advected
57      - only muliDimAdection scheme work with seaice/thsice
58      - mapping of thsice-variables to seaice-variables, back and forth
59      - does not break the verification experiments, but does not give the
60        desired results either
61    o pkg/seaice
62      - make (default) second order advection a bit less confusing?
63    
64    checkpoint58f_post
65    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
66      to pkg/seaice):
67      - new routines thsice_map_exf and thsice_get_exf provide the interface
68      - add an additional formal parameter to thsice_solve4temp
69    o pkg/exf:
70      - add new fields wspeed, snowprecip (to be able to couple to thsice)
71      - correct Stefan-Boltzmann constant
72      - new parameter for longwave surface emittance
73      - separate some stuff from exf_bulkformulae into new routines  
74        exf_radiation, exf_wind
75      - add new parameters and constants: longwave emissivity for ocean, ice
76        and snow, evaporation parameters over ice
77      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
78        either wind from stress or stress from wind
79    o pkg/thSIce:
80    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
81    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
82       and THSICE_CALC_THICKN
83    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
84    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
85      to make debugging easier.
86    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
87    o pkg/bulk_force:
88      - clean-up comments and parameters ;
89      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
90    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
91      generate new output for test-experiment: aim.5l_cs.thSI
92    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
93      testreport accordingly
94    
95    checkpoint58e_post
96    o SEAICE_CGRID adjoint done
97    o R_STAR adjoint implemented.
98      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
99      * need to sort out init. of h0facc, etc.
100    o Make pkg/profile fully independent of ecco,cost, etc. stuff
101      to be able to use it in pure forward.
102    
103    checkpoint58d_post
104    o upgrade simple test-experiment to tutorial example:
105     step.1: duplicate the experiment and (step.2) will remove the old copy.
106      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
107      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
108      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
109      tutorial_global_oce_biogeo    <- copy of dic_example
110      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
111      tutorial_plume_on_slope       <- copy of plume_on_slope
112      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
113      tutorial_global_oce_optim     <- empty for now (David ?)
114      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
115     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
116    o correct a sign problem in cost_scat.F
117    o obcs and ptracers: fix boundary conditions for advections schemes
118      with larger stencil
119    o thsice adjoint: start
120    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
121      completeness
122    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
123      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
124    o ptracers adjoint:
125      * avoid extensive recomputatations
126      * fix missing re-init. of gptr (missed by TAF)
127    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
128      me to turn off the excessive output to STDOUT that this package produces
129    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
130      and add those terms in Vector-Invariant formulation.
131    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
132      if the control period (xx_hfluxperiod etc) is 0
133    o in profiles pkg, clean routines and fix details
134    o in ecco pkg, reading ssh data:
135      fix problem in case the model does not start at iter0=0
136    o fix mnc-pickup/restart for ptracers
137    o new package prifiles:
138      code to compute profile-based cost by Gael Forget
139      (modifs in ecco, ctrl, autodiff)
140    o Benign bug fix in initialization (spotted by M. Mazloff) of
141      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
142    
143    checkpoint58c_post
144    o adjoint: finish NLFS adjoint and provide reference output in
145      verification/global_ocean.90x40x15/results_ad_nlfs
146    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
147      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
148      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
149      with SEAICE_CGRID defined.
150    o move calendarDumps from "data" to "data.cal" and clean-up the code
151      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
152    o add useEXF & useCAL flags (for now, set in hard-coded way)
153    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
154      (were missing in NH mode, and wrong in quasihydrostatic mode).
155      waiting for Chris updated version of calc_gw to add those CALLs.
156    o fix bug in quasihydrostatic S/R ;
157      add a test for this option: global_ocean.90x40x15.qshyd
158    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
159      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
160    o add on/off flag useOffLine for package OFFLINE
161    o seaice:
162      - modify advection so that it works also on the C-grid
163      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
164        problem in multi-tile runs with C-grid
165      - add flags for clipping ice velocities and/or masking solver forcing
166      - fix drag (ocean on ice) formulation and a bug that caused noise in the
167        C-grid solver
168      - added a few comments to seaice_diffusion.F
169      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
170        are now exclusive)
171      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
172        required re-ordering the code a little:
173       + make DAIRN global variable (defined in SEAICE)
174       + move computation of the viscosities eta and zeta into a new separate
175         routine (because I need to recompute them in seaice_ocean_stress.F)
176    
177    checkpoint58b_post
178    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
179      update output.txt of exp. aim.5l_cs.thSI
180    o various mnc cleanups and improvements:
181      + shrink lookup tables by factor of ~4
182      + better error reporting when running out of lookup space
183      + able to handle longer path/file names (up to 500 chars)
184    o adjoint:
185      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
186      - TBD: "hidden" mom_vecinv recomp. in dynamics
187    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
188     (allow to differentiate between forcing components using new integer flags:
189      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
190     and add new flag to put Dissipation tendency out of Adams-Bashforth.
191    o ecco
192      - enable trend removal from SSH anomaly obs.
193    o adjoint
194      - a fix for PmEpR when #undef EXACT_CONSERV
195      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
196      - try to fix "hidden" recomp. in forward_step for NLFS
197        (NLFS seems broken sometimes after I checked it in)
198    o seaice:
199     - add c-grid version of the dynamic solver:
200       + three new routines that are the c-grid substitute lsr, dynsolver
201         and ostres
202       + put a few fields that were local to dynsolver into global common
203         blocks, so that I can move the computation of stresses etc into
204         seaice_lsr (saves coding but may break the adjoint).
205     - replace more hardwired parameters by runtime parameters
206     - add ice masks that mask the rhs of the implicit solvers where there
207       is no ice (commented out in seaice_dynsolver, because i am not sure
208       if this works properly), eventually this should replace the clipping
209       of ice velocities in seaice_dynsolver to +/-40cm/s.
210    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
211      include it only where its needed
212    o move balancing of fluxes before the call of external_forcing_surf
213    o seaice:
214      - correct units of turning angles (now they are really in degrees)
215      - move computation of GWATX/Y out of main routine into dynsolver
216      - initialize GWATX/Y in seaice_init
217    o Apply mask on Fresh-Water flux (needed for SSH forcing).
218      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
219    o seaice: add runtime flags for turning angles (default to zero)
220    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
221      and trend from exf forcing and ctrl control adjustments
222    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
223      (since checkpoint57x_post)
224    o change the default rotation period to 86164.s = the Earth rotation
225    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
226      and based on a reference stratification. Tested within hs94.cs-32x32x5.
227    o seaice advection: add code for choosing between the default (2nd order
228      central differences) and multiDim advection schemes provided by
229      pkg/generic_advdiff
230    o seaice:
231      - removed all references to SEAICE_GRID.h fields from
232        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
233        (cubed-sphere configuration will change a little)
234      - grid computations in seaice_init are obsolete now.
235      - cleaned up code a little so that is easier to read (hopefully).
236      - added new (better?) discretizations of default advection and diffusion
237        (turn on with SEAICEuseFluxForm)
238      - replace 1 in 3d global fields by kSurface in growth.F
239      
240    checkpoint58a_post
241    o seaice:
242      - bug fix in advect.F
243    o shelfice:
244      - separate shelfice load anomaly from pload (breaks with time
245        dependent forcing), => introduce constant field shelficeLoadAnomaly.
246        Its default is 0., but it may be computed more cleverly from (unknown)
247        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
248        done offline. A good approximation of the pressure load anomaly is
249        necessary to avoid large initial adjustment processes underneath
250        deep-reaching shelfice.
251      - small fix in ISOMIP shelfice_thermodynamics
252      - add more sophisticated thermodynamics of Hellmer (1989), this is
253        now the default
254      - give a few constants more intuitive names
255    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
256      if bulk formulae are used in long integration (especially EmPmR). Turn
257      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
258      if balancePrintMean, the imbalance that is substracted is printed to
259      STDOUT.
260    o fix bug (typo) in obcs_apply_eta.F
261    o add a new package shelfice which enables us to model the circulation
262      underneath shelf-ice with draughts of hundreds of meters.
263     - works
264     - to do: + include improved thermodynamics
265              + check whether kSurfC (from model/inc/SURFACE.h) can be used
266                instead of new field kTopC
267              + can we use topoFile, Ro_surf and existing code in ini_depth.F
268                instead of new field R_shelfIce and new code in ini_depth.F
269                and ini_mask_etc.F?
270              + adjust vertical mixing schemes?
271    o seaice pkg:
272     - add a cpp-flag to include a simple formula for a salinity dependent
273       freezing point of sea water at the surface
274     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
275       meridional stresses are now different (and hopefully correct)
276    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
277       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
278       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
279    o pkg/diagnostics: add options and parameters for regional-statistics
280       diagnostics ; define regions by reading a region-mask from a file
281       (might add other options later)
282    o pkg/bulk_force:
283     - add option and parameters to use AIM surface-flux formulae.
284     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
285       others forcing fields (defined in PARM05, parameter file "data") are loaded
286       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
287     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
288     - use the right EXCH call for uwind,vwind (to work on CS-grid).
289     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
290       and parameters (note: calcWindStress replaces .NOT.readwindstress).
291     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
292    
293    checkpoint58
294    o add "--embed-source" option to genmake2 which, when the supporting
295      tools can be compiled (as determined by genmake2) will turn on the
296      embed_files package which then embeds the entire MITgcm source code
297      (*.[fFhc] + Makefile) used for the build within the executable
298      - requested by CNH but off by default
299      - adds a paltry <9MB to the mitgcmuv executable in most cases
300      - only writes the output when useEMBEDSRC in eedata is true
301    o clean up 3-dim. relaxation codes:
302      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
303      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
304      * Thanks to Tom Haine for testing!
305    
306    checkpoint57z_post
307    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
308      affects output (@ truncation level) of exp. plume_on_slope ; updated.
309    o fix the pickup behavior for obcs in combination with ptracers
310    o fix a bug in ptracers_external_fields_load
311    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
312      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
313    o transfered surface NH pressure to eta field (if exactConserv).
314    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
315         and update lab_sea output.txt file.
316    o completing 3-dim. relaxation code: additional term
317         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
318      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
319      * At compile time, in "EXF_OPTIONS.h" set
320          #define  ALLOW_CLIMTEMP_RELAXATION
321          #define  ALLOW_CLIMSALT_RELAXATION
322      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
323          tauThetaClimRelax3Dim = 15552000.0,
324          tauSaltClimRelax3Dim  = 15552000.0,
325      * 3 cases:
326          1) Use a constant-in-time 3-dim. field
327          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
328          3) Real-time relax. to time-evolving prescribed field
329    o Adding Laplacian-type smoothness constraint on
330      initial and boundary (forcing) controls (ic, bc)
331      * enable at compile-time via
332        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
333      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
334      * Absolute scale somewhat unclear so far
335      * no area weighting was included since no other cost term does so far
336    
337    checkpoint57y_post
338    First step for a NLFS adjoint
339    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
340    o new init. routines for calc_r_star, calc_surf_dr
341    o still need to deal with ini_masks_etc
342    o testreport seemed happy
343    checkpoint57y_pre
344    
345    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
346    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
347    o add new offset feature to offline pkg (plus minor cleanup)
348    o cfc fixes for final year of integration
349    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
350      be in GCHEM_OPTIONS).
351    
352    checkpoint57x_post
353    o fix testreport Pb in multiple test experiment.
354    o cleanup our namelist syntax in verification:
355      - make it more F95 standards compliant (some work still needed)
356      - allows the vast majority of our tests to work with gfortran
357    o Non-Hydrostatic:
358     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
359     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
360    o Allow to apply AB on T,S rather than on AB(gT,gS):
361     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
362     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
363       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
364     - need a "clever" read_pickup to restart from the other AB formulation
365    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
366    o remove some unused variables (reduces number of compiler warnings)
367    o adjoint
368      * Disable useVariableViscosity for adjoint for time being
369        (there are a number of extensive recomputations)
370      * Initialize certain variables needed for adjoint
371    
372    checkpoint57w_post
373    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
374                 fix the singleCpuIO RS version of MDSWRITEFIELD
375       and add a WARNING if using globalFiles=T with multi-processors.
376    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
377      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
378    o tracer advection scheme:
379      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
380       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
381       was not very convenient).
382      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
383       (further tests needed for the implicit DST & Flux-Limiter schemes).
384    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
385      and sRef for convenience, handy, when you want to initialize
386      ptracers in a large domain with a constant non-zero value. Also,
387      untangle ptracers_init.F a little.
388    
389    checkpoint57v_post
390    o change dome exp. to use variable viscosity in side-drag terms.
391    o remove all the files from the cfc_offline test since they are now
392      incorporated into tutorial_cfc_offline which has been producing
393      identical results for a few days of testing
394    o add new parameter: sideDragFactor to enable half-slip-side BC
395      and change side-drag S/R to use viscosity from mom_calc_visc
396      (can switch back by setting sideDragFactor=0.); affects results at
397      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
398       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
399    o vorticity & strain are now computed without masking, to account for
400      no-slip-side BC in variable viscosity calculation ; mask is applied
401      anyway later on, before computing advection/coriolis terms.
402    o modify exp4 to test new obcs support for reading from external files
403      and for passive tracers
404    o fix behavior of ptracers_monitor when monitor output is written to a
405      netcdf-file; still not independent of monitor.F (writes in the same
406      file).
407    o change default value of tRef (put a uniform, meaningful value for ocean
408      & atmos) and initialize sRef (was missing, as Martin mentioned).
409    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
410      to be proportional to enstrophy dissipation length.  Thus,
411       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
412      This is now consistent with Smagorinsky and with the manual.
413    
414    checkpoint57u_post
415    o OBCS and PTRACERS: add open boundary support for passive tracers
416      - either use homogenous (pseudo) v.Neumann conditions or prescribe
417        OB-values from file; this is not different from the way theta and salinity
418        are treated
419      - however, Orlanski-radiation conditions are not supported, and the model
420        will stop if you use pTracers and Orlanski at the same time.
421      - beefed up the rountine obcs_external_fields_load: now only those open
422        boundary values are overwritten with values from files for which there
423        are really files, otherwise the OB-fields remain untouched. This makes
424        it possible to use different OBs at different ends of the domain (as
425        with EXF)
426    o reduce number of exch calls in shap_filt (s2).
427    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
428      truncation level) 4/5 MLAdjust test results (11&12 digits match).
429    
430    checkpoint57t_post
431    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
432    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
433      same truncation, independent of the face number: affects affects several
434      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
435    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
436      note that biharmonic viscosity + no-slip was not tested in any experiment.
437    o fix bug in non-linear free-surf side-drag ; generate new output for
438      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
439    o make mnc honor the writeBinaryPrec flag for most kinds of output
440    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
441    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
442      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
443    o add brackets in multi-terms sum to get same truncation, independent of
444      the face number (manage to get exactly same value of gU,gV at the cs-edge)
445      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
446    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
447      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
448      a maximum grid-scale Reynolds number.  Also, changes all length calculations
449      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
450      Suggested values of viscosity parameters found in mom_calc_visc.
451      Many new viscosity diagnostics available.
452    
453    checkpoint57s_post
454    o Add clearing-house for viscosity calculations, mom_calc_visc and
455      correct numerous bugs in LeithD and Smagorinsky discretizations.  
456      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
457      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
458      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
459      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
460      The Strain-Tension form is now called with useStrainTensonVisc=.true.
461      ViscAhStrain and viscAhTension are now retired.
462    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
463    o In response to JMC's bug report, genmake2 now ignores any soft-links
464      that it finds in the *current* directory when searching for files.
465      Soft-links found in any other source directories will still work as
466      they did before.
467    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
468      a C routine to unlimit the stack size
469    o mnc-ify pkg/aim snapshot vars
470    o mnc-ify pkg/land as requested by Daniel
471    o various changes to mnc including:
472      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
473      - output can now be grouped so that all files within a group
474          change the ITER portion of their names in lock-step together
475      - can now read ("global") PER-FACE (in addition to PER-TILE) files
476          and works with both EXCH1 and EXCH2 (but needs more testing)
477      - writing works for all verification test cases w/ g77 on Linux
478    
479    checkpoint57r_post
480    o make MNC variable initialization happen earlier
481    o add diagnostics for (almost) each term of the momentum Eq.
482    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
483    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
484    o remove MINIMAL_TAVE_OUTPUT option ;
485      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
486    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
487      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
488    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
489    o add time-dependent SST, SSS control
490    o cost terms in ecco/ modularized (new cost_generic.F)
491    o cost_averages routines are modularized (new cost_averagesgeneric.F)
492    o new infrastructure for seaice model vs. obs misfits in seaice/
493      * driver from the_main_loop.F is seaice_cost_driver.F
494      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
495      * gradient check in Exp. 6a of natl_box_adjoint/
496    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
497      (see README file)
498    
499    checkpoint57q_post
500    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
501    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
502      - bug was reported by Jean-Michel and Ian Fenty
503    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
504      update exp. cpl_aim+ocn output.
505    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
506      Needed for high-res. runs with large global files
507      to be able to limit tapelev size
508    o Changed some tests for adjoint:
509      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
510      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
511      * global_ocean.90x40x15/ back to default 3-level checkpointing
512    o Modifications to enable scripted COMMON to MODULE conversion
513      * verification/OpenAD/code/ has necessary scripts and description;
514      * converts, compiles and runs successfully;
515    
516    checkpoint57p_post
517    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
518    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
519      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
520    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
521    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
522      (was already the case for dissipation with mom_vecinv,
523       and also the case for grad.PhiHyd when staggered-timeStep)
524      This will allow to put dissipation out-off the AB time-stepping.
525     Unfortunately, affects truncation error. Update output of exp. that "fails"
526      (cg2d matching number) and leave the others for later: front_relax(10),
527      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
528      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
529    
530    checkpoint57o_post
531    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
532      (2) its ready to be documented during the 20050801 DocFest
533    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
534      for ideal_2D_oce and lab_sea on linux_ia32_g77
535    o set to #undef CTRL_SET_OLD_MAXCVARS_30
536      in global1x1_tot/code_seaice_adj to access indices 32, 33
537      (worth another tag)
538    
539    checkpoint57n_post
540    o adding precip control xx_precip 32
541    o adding swflux control xx_swflux 33
542    o Replacing 10 forcing penalty cost routines by 1 generic.
543    o Implementing partitioning in time-mean and variable adjustment
544      for atmos. state.
545    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
546    o in natl_box_adjoint:
547      * updated exp 1 to 10
548        (but does not have time-mean vs. variable split results yet)
549    o updated global1x1/*_seaice_adj/
550      to incorporate latest changes
551    o enable useSingleCpuIO for mdsio vector routines
552      (applies in particular to tapelev I/O)
553    o removed inefficient K-loop in all active_file*control*.F
554    
555    checkpoint57m_post
556    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
557      and advect_cs (use EXCH-2 and standard cs-32 grid files).
558    o pkg/exch2: filling of face-corner halo regions is optional
559      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
560    
561    checkpoint57l_post
562     tag before updating tutorials (pre-release-2)
563    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
564       for output and interpolation of input fields onto model grid)
565    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
566       Affects results of exp. rotating_tank ; update output.txt.
567    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
568          and taking the square quantity and/or using a fraction-weight field.
569    o fix aim_diagnostics_init.F mate numbers.
570    o add mnc output capability to diagnostics/diagstat and update
571      our cvsignore files for the ACSII output generated
572    
573    checkpoint57k_post
574    o lab_sea now uses diagnostics package and provides a suite of
575      new EXF diagnostics output.
576    
577    checkpoint57j_post
578    o exf
579      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
580        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
581        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
582      * extended diagnostics output
583        - now includes all EXF variables
584        - hs, hl moved to common block
585        - separate S/R for diagnostics, called after ctrl vector is added
586        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
587        - EXFqnet contains true Qnet (i.e. includes qsw)
588      * updated verif. lab_sea, global_with_exf
589      * Rearranging hflux (exf_mapfields -> exf_getforcing)
590        to ensure that diagnostics sees a true EXFqnet
591    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
592    o diagnostics pkg: change pointers so that 1 diagnostic can be used
593      several times with different frequencies.
594    o mnc-ify the thsice package as requested by Daniel Enderton
595      - the monitor--MNC output needs work
596      - many attributes need to be added (most are currently blank)
597    o mnc-ify theaim_v23 package as requested by Daniel Enderton
598      - many attributes need to be added (most are currently blank)
599    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
600    o add Sadourny like discretization to the 4th.O vorticity advection scheme
601    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
602      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
603         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
604    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
605     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
606    
607    checkpoint57i_post
608    o Diagnostics package was changed: diagnostic allocation is now deactivated
609      by setting an empty file name in the namelist (used to be by setting 0 frequency)
610    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
611      add 1rst Order upwind vertical Shear.
612    o add a quick fix for A/B checkpointing in OFFLINE mode
613    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
614      end-run around the C/Fortran linking horror in eesup/src/timers.F
615    o added pkg/runclock: allows user to terminate run based on wall clock
616    o added non-hydrostatic scaling parameter: nh_am2
617    o pkg/my82: futile attempt to make results compiler-independent by adding
618      some "_d 0", etc. no effect.
619    o for mnc output, fill the 'T' coordinate var with myTime and create a
620      separate 'iter' variable for iteration count
621    o pkg/diagnostics:
622      add new capability: output of Global/Regional & per-level statistics ;
623      tested against monitor output (including land & thSIce) on various exp.
624    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
625    
626    checkpoint57h_done
627      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
628      data.diagnostics, data.gchem, data.ptracers) is done.
629    
630    o pkg/diagnostics: prepare for Global/Regional statistics.
631      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
632    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
633      and rename it: DIFFERENT_MULTIPLE
634    
635    checkpoint57h_post
636    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
637    o pkg/diagnostics: change output frequency, now in seconds (instead
638      of Nb of iterations). This requires to change data.diagnostics.
639    checkpoint57h_pre
640    
641    o in mnc, let the user create the output dir if both mnc_outdir_date
642      and mnc_outdir_num are false
643    o add fflags() to pkg/diagnostics which allows one to specify, on a
644      per-file basis, the file precision [default behavior is unchanged]
645    o added diagnostics to pkg/kpp, including computation of mixed layer
646      depth based on a temperature/density criterion
647    o updated verification/natl_box to test the new pkg/kpp diagnostics
648    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
649    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
650    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
651      not mnc -- this mistake was found by JMC and is now corrected
652    
653    checkpoint57g_post
654    o add Adams-Bashforth 3rd Order time stepping:
655      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
656      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
657    checkpoint57g_pre
658    
659    o make lambda[Theta,Salt]ClimRelax spatially varying
660      (default remains spatially uniform constant based on tau)
661    o added new control variables
662      * init. uVel, vVel, etanN
663      * lambda[Theta,Salt]ClimRelax
664    o separate masks used for ctrl_pack/unpack 'from write_grid' output
665      (suggested by G. Forget)
666    
667    checkpoint57f_post
668    o add parameter "baseTime" = model base time = time at iteration zero
669      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
670      account for baseTime shift
671    o move Coriolis arrays from PARAMS.h to GRID.h
672    checkpoint57f_pre
673    
674    o mnc-ifying the seaice package
675    o introduced an alternative length scale calculation for use in the limiting
676      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
677    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
678    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
679      as well as grad(vort3).  Made it compatible with both approximate form
680      for the cubed sphere and full form of these gradients.  Added flag
681      useFullLeith to select between approximate and full form.  
682    o add "d0" in getcon.F to reduce differences between compilers/platforms
683      update output.txt of exp. fizhi-gridalt-hs
684    o change port_rand funtion to allow to set the seed.
685    o fix obscure MNC bug involving conversion between reals and integers
686      - it caused no problems with certain (eg. gcc, ifc) compilers but the
687        new version is now more standards-compliant
688    o adjoint-related modifications
689      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
690      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
691      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
692    
693    checkpoint57e_post
694    o Adding eddy stress controls a la Ferreira et al.
695    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
696    
697    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
698      update output.txt of exp. fizhi-gridalt-hs
699    o add more "Z" dimensions and associated coordinate vars to MNC
700    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
701    o parameter calendarDumps: when set, approximate months (30-31 days) and years
702      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
703      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
704      months and years.  Requires pkg/cal.
705    o diagnostics: add pickup functionality
706      - off by default for backwards compatibility
707      - current version only uses MDSIO -- MNC will be added
708    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
709    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
710    
711    checkpoint57d_post
712    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
713    o modify verification/ideal_2D_oce so that it tests the creation of mnc
714      output from the diagnostics package
715    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
716    o make genmake2 more portable by using ".$FS" instead of ".f" for more
717      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
718    o add coordinate variables to the MNC output from the diagnostics package
719    o change MNC-flags default value: true when useMNC=TRUE
720    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
721      the ability (off by default) to read the grid information using MNC
722    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
723    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
724    o do snap-shot diagnostics at the middle of the time-interval (instead of
725      at the end).
726    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
727      new test for AIM with thSIce + slab-ocean
728    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
729    o move state variable diagnostics to the beginning of the time step ;
730      (note: still needs some work specially for snap-shot diagnostics)
731      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
732    
733    checkpoint57c_post
734    o Change testing option (-ieee) to get closer agreement between g77 & ifort
735    o generate new output.txt files on faulks with g77 & the new -ieee option
736    checkpoint57c_pre
737    
738    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
739      update output.txt of exp. global_ocean.90x40x15
740    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
741      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
742    o add saltFlux(+File) forcing capability with periodicExternalForcing
743    o allow to use pkg diagnostics for GM-Redi & ThSIce output
744    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
745    o improvements for the MNC output from DIAGNOSTICS:
746      - correct handling of the unlimitied dimension
747      - all dims now have associated coordinate variables
748      - variables located at U, V, and Corner ("Z") points are now written
749        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
750        *all* data points are output
751    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
752    o added pkg/seaice/seaice_monitor.F
753    o mdsio_readfield.F can now read files visible only to master MPI process.
754    o pkg/seaice: some test code for ice-modified ocean stress
755    o exf_getffields interpolation defaults to bilinear for all scalar forcing
756      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
757      spurious negative numbers for precipitation and humidity.  Will cause
758      some small numerical differences for integrations using pkg/exf/exf_interp.F.
759    o pkg/ctrl/
760      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
761        May be enabled via doPackDiag
762      *  introduce z-scaling of
763         + gradient (doZscalePack) and
764         + control (doZscaleUnpack)
765    o pkg/mdsio/
766      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
767      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
768    
769    checkpoint57b_post
770    o simplify options in diagnostics_fill arguments (remove weird combinations)
771    o fix MNC coordinate variables so that they now contain per-face index
772      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
773      general, EXCH2 grids are only aligned to a "local" coordinate system
774    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
775    o Implement instantaneous output within pkg diagnostics:
776      setting a negative frequency in data.diagnostics produces
777     "snap-shot" output (as opposed to time-average if freq > 0)
778    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
779      NOTE: change ptracer diagnostics name: use 2 characters to work with
780            more than 9 tracers. Add also diagnostics of advect & diffus flux.
781    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
782      becomes the coordinate variable for the 'T' dimension
783    o add CF-style coordinate variables to MNC
784      - just a first cut:  numbers are meaningless on the cubesphere and
785        missing along the T axis but otherwise it works!
786    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
787    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
788    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
789      this is based directly on what the model compute, so that the content of
790      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
791    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
792    o clean up build options files for SunOS, in particular
793      - remove -traditional from xmakedepend
794      - change -xarch=v9 to -xarch=native for f77
795      - restore use of make (not gmake)
796      - add CC=gcc if using g77
797    o changes per discussion of AM, JMC, & EH3 today:
798      - move redundant "grid" variables out of "state" -- in preparation of
799        creating proper CF-style coordinate variables and in recognition
800        that any/all grid variables can be easily copied (eg. w/NCO) from
801        the grid files into any of the other NetCDF files
802      - *always* output grid variables with MDSIO (this will eventually be
803        changed)
804      - output MNC grid file if useMNC is true
805    o every instance of _END_MASTER() has been found and replaced with
806      _END_MASTER( myThid ) in order to satisfy certain picky Sun
807      preprocessors
808    o re-arrange diagnostics pkg initialisation:
809     - allow each package to extend the available diagnostics list
810     - add some checking and fix small problems (multi-threaded, ...)
811     - new S/R diagnostics_fill (replace fill_diagnostics):
812       look through the short list of active diag. (instead of the long list)
813       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
814    
815    checkpoint57a_post
816    o this set of changes restores TAMC compatibility
817      tested for global_ocean.90x40x15 adjoint on trough
818      (what a pain)
819    
820    checkpoint57a_pre
821    o some modifs in tools/build_options for sunos
822    o call ctrl_pack for ctrl at end for optimcycle=0
823    
824    checkpoint57
825    o add horizontal bi-harmonic viscosity for vertical velocity
826      - new parameter viscA4W (defaults to viscA4)
827      - affects only non-hydrostatic code
828      - to be done: no-slip lateral boundary conditions
829    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
830    o implement Implicit Vertical advection for pTracers
831    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
832      (implemented also for implicit vertical diffusion & advection)
833    o OBCS: extend application of tracer open boundary conditions
834      to a strip beyond the boundary of width Olx/Oly
835    o add call monitor to TAF set of required calls (flow directives)
836      and include in natl_box_adjoint
837    o untangle a few ifdefs related to cost, ctrl, autodiff
838      untangel a few ALLOW_ECCO_OPTIMIZATION
839    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
840      (theta2, salt2 in ecco_cost_weights)
841    
842    checkpoint56c_post
843    o OBCS as control variables
844      - update ctrl_ad_diff.list, obcs_ad_diff.list
845      - remove balance of obcs controls from default
846      - fix index bug nobcs in ctrl_init
847      - fix dummy fields filen in ctrl_pack
848      - add dummy weights for obcs
849    o lsopt: comment out fort.94 output
850    o optim:
851      - remove unnecessary header files
852      - adjusted namelists
853      - add xerbla.F to Makefile
854    o exf:
855      - multiple modifications of exf_check_range
856      - unit change in exf_init_runoff from [m/year] to [m/s]
857    o mdsio:
858      - i/o-vector change debugLevel from debLevA to debLevB
859    
860    checkpoint56b_post
861    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
862      is called from DO_THE_MODEL_IO
863      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
864      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
865      - clean up PTRACERS_WRITE_TIMEAVE a little
866    o add another verification experiment that tests both the cfc-pkg and
867      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
868      reactive tendencies treated inline with regular timestepping
869    o testreport previously did a lousy job of comparing small numbers, so
870      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
871      implemented in the little c-progam tmp_cmpnum.c which is embedded in
872      testreport.
873    o ptracers_monitor: bug fix for MPI
874    
875    checkpoint56a_post
876    o GCHEM: finish reorganizating the package
877      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
878        (introduces another 3D-array for each passive tracer, but only if
879        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
880        gchemTendency is not needed because the timestep is done separately)
881      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
882      - GCHEM is now---more or less cleanly---separate from PTRACERS
883      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
884        so clear to me how that should be done in a general way.
885    o CFC: improve formatting of output in CFC_ATMOS
886    o PTRACERS:
887      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
888        that ALL experiments with ptracers enable can be checked. This makes
889        GCHEM_MONITOR obsolete.
890      - include a runtime parameter PTRACERS_monitorFreq that defaults to
891        monitorFreq
892      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
893    o add PTRACERS (PTR0[1-5]) to testreport output
894    o exf_check_range:
895      * default changed to .TRUE.
896      * will check values for niter0 if debLevA, every timestep if debLevB
897      * STOP in exf_check_range if 'out of range'
898      * range chosen generous to allow for potential extema
899      TBD: a version with stricter range
900           permitted range would be runtime parameters
901    o GMredi:
902      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
903      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
904      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
905    o GCHEM:
906      - move call to GCHEM_FORCING_SEP, so that it is now called before
907        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
908      - introduced a useGCHEM runtime flag and applied it everywhere.
909      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
910        this flag is now only visible within GCHEM-pkg routines.
911      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
912        be replaced by a 3D array that is computed before thermodynamics; for
913        this, the tracer ID iTracer had to be included into the parameter list
914        of ptracers_forcing
915      - set up forward_step to call gchem_forcing, that will replace
916        gchem_forcing_int in ptracers_forcing
917      - cleaning up
918    o small cleaning of exch2: remove files that are also in eesupp/src
919    
920    checkpoint56
921    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
922    o mnc: cleanup "full" files--fixes out-of-memory problem
923    o ECCO-GODAE
924      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
925      * fully merged and updated from SIO code
926        windstress sign change affects
927        - exf_inscal_[u/v]stress
928        - sign of xx_tau[u/v] adjustments
929        - signs in cost_scat
930      * ctrl_get_gen: avoid update of tau[u/v] for first few days
931      * natl_box_adjoint updated and compressed
932      * 2-level checkpoint switch added
933        (tested in EXP. 1 of natl_box_adjoint)
934      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
935    o SVD
936      * first complete, non-hacked version for SVD calculations
937      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
938        performed via direct access files admtlm_vector.it????
939        (via ctrl_[un]pack)
940      * optimcycle is used for ARPACK iteration counter
941        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
942      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
943        and add linear transforms where necessary
944      * controls are initial/final SST, SSS (can be extended; need to check
945        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
946    o mdsio: filename info to both stderr, stdout
947    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
948      from sign change
949    
950    checkpoint55j_post
951    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
952      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
953    o add consistent build directories and .cvsignore files to verification
954    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
955    o make all subroutines 30 or less characters in length for certain older
956      compilers to work (a thorough search only turns up two routines in
957      pkg/ptracers)
958    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
959      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
960    
961    checkpoint55i_post
962    o change arrays for total vertical diffusivity (2.D if explicit,
963      3.D if implicit) ; each ptracer uses its own background value.
964    o added mnc/NetCDF output capability to ocn_compon_interf
965      - added bits to verification/cpl_aim+ocn so that it can run on
966        ITRDA and other clusters without the mpirun "-wd" option
967    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
968      configuration
969    o give MNC the ability to create additional files rather than
970      exceeding a specified file size limit "MNC_MAX_FILESIZE"
971      - the default is just less than 2GB which is a practical limit
972        on many systems
973    o Compute the non-local term using either KPP vertical diffusivity (=default)
974       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
975    
976    checkpoint55h_post
977    o add verification test "vermix"
978    o remove all the *_ioinc flags and replace with the single global
979      outputTypesInclusive flag
980    o allow to set a vertical profile of vertical diffusivity for T & S
981    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
982    o useMNC moved from data.mnc to data.pkg
983    
984    checkpoint55g_post
985    o Renaming carbon AD experiments to comply with testreport conventions
986    o Updating adjoint of Held-Suarez hs94.1x64x5
987    o Fixing directives for non-ECCO forward_step, after ECCO directives
988      have been fixed to avoid recomp. of do_oceanic_phys
989      Works well for global_ocean.90x40x15,
990      but recomp. issue remains for carbon
991    o Updating adjoint output for natl_box_adjoint after
992      pkg/ecco has been modified (see taga c55d_post)
993    
994    checkpoint55f_post
995    o rename to timeave_init_fixed
996    
997    checkpoint55e_post
998    o some delicate re-shuffle of store directives to avoid one
999      extra call of do_oceanic_physics
1000      affects ecco_the_main_loop.F, do_oceanic_physics.F
1001      checkpoint_lev1_directives.h
1002    o NB: this may break global_ocean adjoint temporarily,
1003      but it is clear how to fix it. Will do later, need this now.
1004    
1005    checkpoint55d_post
1006    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1007    o ecco_cost_weights is modified to 1x1 runs
1008    o modifs to allow observations to be read in as
1009      single file or yearly files
1010    o enable to read exf forcing fields as either
1011      single file or yearly files (flag useExfYearlyFields)
1012    checkpoint55d_pre
1013    
1014    o switch between 2-level and 3-level checkpointing
1015    o add ability of MNC to write local and "partial" (eg. 2D slices where
1016      the full 3D field is never actually stored) arrays to NetCDF files
1017      with the correct (that is, the complete multi-dimensional) set of
1018      array indicies
1019      - used in mom_vecinv() to write the diagFreq output
1020      - tested (demonstrated) in verification/aim.5l_cs
1021    o further mnc-ification
1022      - add verification/lab_sea to the list with mnc setups
1023      - fix undefined mnc v-names in cd_code
1024      - add kpp to mnc output (both snapshot and timeave)
1025    o non-hydrostatic code
1026      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1027        in calc_gw.F
1028      - defaults to viscAh
1029      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1030        friction or Leith) in non-hydrostatic mode, as long as there is
1031        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1032    o pkg/cost
1033      extend simple cost functions to treat time mean quantities
1034      (T,U,V) via cost_accumulate_state from cost_tile
1035    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1036        be 2 times larger than the minimum size the advection scheme requires.
1037        now get a perfect conservation of salt in advect_cs test-exp (updated)
1038    o GGL90 (Gaspar's TKE mixed layer)
1039      - add horizontal diffusion of TKE, requires exchanges in
1040        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1041        default. In OPA there is no horizontal diffusion of TKE but the
1042        mixing coefficients are computed from a horizontal average of TKE of
1043        6 points or so. I think that diffusion has a little more physical
1044        justification.
1045      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1046        was in vain)
1047      - mask tke-variable in ggl90_init
1048    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1049    o fix biharmonic diffusion on CS-grid.
1050    o more obcs stuff
1051      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1052        for reading boundary values. This routine is called from
1053        obcs_prescribe_read
1054      - updated obcs_check
1055      - changed sponge layer relaxation parameter units for days to seconds
1056      - turned off sponge layer by default
1057      - changed argument list of OBCS_CALC to myTime+deltaTclock
1058      - fixed about 35 bugs in obcs_external_fields_load
1059    
1060    checkpoint55c_post
1061    o obcs stuff
1062      - new runtime flags useOBCSprescribe, useOBCSbalance
1063      - re-arranged obcs_calc
1064      - moved exf_getobcs to obcs_prescibe_read
1065        obcs_prescibe_read is called after ORLANSKI stuff
1066        and independent of it (executable can contain all).
1067      - updated obcs_check
1068      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1069        These may be necessary only if tangential velocities are
1070        prescribed at OB, not sure, needs testing.
1071    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1072      which simplifies the calls and passes the ifc check-bounds test
1073    
1074    checkpoint55b_post
1075    o add a 2D scalar, Z location, exchange_2 routine.
1076    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1077      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1078      affects advect_cs results (for the wrong reason): update output.txt
1079    o use a more standard discretization for biharmonic viscosity ;
1080     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1081      affects results of dome set-up: update output.txt
1082    o fix gad_advection.F (CubedSphere part), back to version 1.23
1083    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1084    
1085    checkpoint55a_post
1086    o merged code to
1087      * prescribe/read time-dependent open boundaries
1088        (works in conjunction with exf, cal)
1089      * sponge layer code for open boundaries
1090      * each boundary N/S/E/W now has its own CPP option
1091        (healthy for the adjoint)
1092    
1093    checkpoint55
1094    o up-to-date adjoint of previous breaks
1095      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1096      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1097      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1098      - carbon: * remove tr1-related adjoint verification
1099                * add ptracer as control variable
1100    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1101      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1102    
1103    checkpoint54f_post
1104    o in verification/carbin/ remove experiment related to
1105      ALLOW_PASSIVE_TRACER (array tr1 etc)
1106      code_ad/ input_ad/ results_ad
1107    
1108    o add two new packages
1109      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1110        + subject to optimization (memory)
1111      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1112        + subject to reordering (many GOTOs in the original code)
1113        + so far opps is called for every (i,j) point, and then operates in
1114          the vertical; one may want to reorder the scheme in order operate in
1115          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1116          fields)
1117    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1118      - all verification tests compile and run with linux_ia32_g77
1119      - defaults are compatible with current input files--nothing
1120        should change if you were not previously using MNC
1121      - MNC output has been added in numerous places (eg. timeave)
1122        but there are still a few writes not yet do-able with MNC
1123        (this is in progress)
1124      - flags now allow for either/or/both use of MDSIO and MNC and
1125        documentation will soon follow
1126      - numerous small formatting cleanups for ProTeX
1127    o add version info (via BUILD_INFO.h) to MNC and stdout
1128    
1129    checkpoint54e_post
1130    o add two new packages
1131      - pp81 (Packanowski and Philander, 1981), Richardson number and
1132        stratification dependent mixing
1133      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1134      - these scheme operate in a similar manner as KPP (without ghat, of
1135        course), however there is only one diffusivity that is used for both
1136        temperature and salinity (and passive tracers)ç
1137    o add offline package
1138    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1139      provided by Stephanie Dutkiewicz
1140    o genmake2: add ability to search for C compilers and cleanup test output
1141      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1142    
1143    checkpoint54d_post
1144    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1145    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1146      leading to additional shift by 5 days each year of integration
1147       (i.e. leading to considerable offset over the years)
1148    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1149    o start with no AB and no initial filtering (staggerTimeStep):
1150      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1151    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1152      (external loading & cpl import/export stay in forward_step.F)
1153    o update coupling interface to work with new staggerTimeStep
1154    o change MDSIO ptracers_pickup.
1155    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1156    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1157    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1158    
1159    checkpoint54c_post
1160    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1161      this affects (truncation error) output.txt of test-exp:
1162       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1163    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1164    o change Qnet to always be the net heat flux, (+upward).
1165      affects (truncation error) output of natl_box exp.: updated
1166    o define the max number of passive tracers in PTRACERS_SIZE.h
1167    o start to test mnc routinely in exp0
1168    o add sea-ice loading (sIceLoad) as a new forcing field.
1169    
1170    checkpoint54b_post
1171    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1172       impressive on Altix and Opteron systems)
1173    o diagnostics can now write NetCDF files through the mnc package
1174    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1175    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1176    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1177      affects (truncation error) output of lab_sea & natl_box exp.: updated
1178    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1179    
1180    checkpoint54a_post
1181    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1182    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1183    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1184    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1185      + internal_wave (shift in writing cg2d_ini_res)
1186    checkpoint54a_pre
1187    
1188    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1189      - modified verification/lab_sea and natl_box_adjoint accordingly
1190    
1191    checkpoint54
1192    checkpoint53g_post
1193    o prepare splitting of thermodynamics: store convect.counter in common block
1194    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1195      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1196    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1197    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1198    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1199    o restore adjointability
1200    
1201    checkpoint53f_post
1202    o modifications that affect AIM experiment results (update output.txt):
1203      - no advection of S at top interface Nr (pkg/generic_advdiff)
1204      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1205    o AIM pkg:
1206      - include stability function into surf.Flux derivative relative to Tsurf
1207      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1208    
1209    checkpoint53e_post
1210    o merged cylindrical coord configuration
1211    o added rotating_tank experiment
1212    checkpoint53e_pre
1213    
1214    checkpoint53d_post
1215    o faulks upgraded: re-generate output.txt that have changed:
1216       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1217    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1218    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1219    o added Sadourny discretization of Coriolis
1220      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1221      - re-enabled use of omega3 (useAbsVorticity)
1222    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1223      vector-invariant equations
1224      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1225    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1226      hopefully without new bugs
1227      - still to do: biharmonic friction for non-hydrostatic w
1228    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1229    o regenerated output for global_ocean_ebm (using -ieee)
1230    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1231      of mom_common/
1232      - simple re-arrangement of instructions within computing loop
1233    checkpoint53d_pre
1234    
1235    checkpoint53c_post
1236    o new version of coupler for AIM+thSIce and Ocean models
1237     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1238     - land: change Evaporation of snow
1239     - aim with thSIce: fix bug in snow-precip.
1240    o changes to calc_gw.F
1241     - bug fix for w^2 term near the bottom boundary
1242     - (hopefully) improve the lateral slip boundary condtions for use with
1243        partial/looped cells
1244      - because the bug fix changes two verification experiments anyway (exp5
1245        and plume on slope), change the lateral boundary condition from half slip
1246        to the value of no_slip_sides
1247    o ebm package wasnt quite up to the parallel task. Fixed that.
1248    o Adjoint of EBM package + verification
1249      * TLM OK
1250      * ADM not sufficient accuracy yet (needs further testing)
1251    
1252    checkpoint53b_post
1253    o Commiting new energy balance model to repository
1254      * package is pkg/ebm
1255      * verif. is verification/global_ocean_ebm
1256      * references are in ebm_driver.F
1257    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1258    C        Global thermohaline circulation. Part I:
1259    C        Sensitivity to atmospheric moisture transport.
1260    C        J. Climate 12(1), 71-82
1261    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1262    C        Global thermohaline circulation. Part II:
1263    C        Sensitivity with interactive transport.
1264    C        J. Climate 12(1), 83-91
1265    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1266    C        Destabilization of the thermohaline circulation
1267    C        by atmospheric eddy transports.
1268    C        J. Climate 7(12), 1870-1882
1269    o Will need long integration testing.
1270    checkpoint53b_pre
1271    
1272    o created pkg/mom_common in preparation for variable viscosity code
1273    o renamed and split ini_mnc_io
1274    o pkg/land: only liquid water can diffuse or run-off
1275    o AIM using land: soil wetness availability account for snow
1276    o added printMapIncludesZeros to EEPARMS namelist
1277    
1278    checkpoint53a_post
1279    o restore TAMC compatiility for exf_constants.h
1280      (no usage of _d in .h)
1281    o Additional storing in KPP in an attempt to fix
1282      TAMC problem with adjoint of KPP code.
1283      (no success...)
1284      Identical code works fine with TAF.
1285    o Fixed verification/natl_box_adjoint experiments.
1286      Initial conditions for Experiments 4 and 5 are now
1287      set to "SEAICE_initialHEFF=0", which is more reasonable,
1288      and hence gives results closer to that of Experiment 2.
1289      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1290    
1291    checkpoint53
1292    o stable checkpoint with up to date adjoint
1293      TLM tests only run for 1st grdchk at the moment. Its unclear if
1294      this is a code problem or a problem with resetting code for g_
1295      variables that is being autogenerated wrong.
1296      Otherwise:
1297       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1298       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1299         are both still in chaos following their security messes.
1300    
1301    checkpoint52n_post
1302    o various build (mostly genmake2) changes including:
1303      - ability to build/run more easily within Cygwin and MacOS X
1304      - more complicated Makefiles with a stronger dependence on Gnu Make
1305    o pkg/seaice modifications
1306      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1307        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1308        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1309      - changed proxy for geostrophic velocity and updated
1310        verification/lab_sea/results/* accordingly
1311      - removed ADI dynamic solver from pkg/seaice
1312      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1313        they caused a segmentation fault under certain circumstances
1314      - removed unused field WATR
1315    o bug fix in exf-package:
1316      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1317         now reflect that.
1318    o small fixes in the cal-package:
1319      - set reference date to first of January for the 'model'-calendar
1320      - failing of cal_CheckDate in cal_FullDate now actually results in a
1321        warning
1322    o small modifications in exf-package to increase flexibility:
1323      - change climtempfreeze from a constant to a runtime parameter that
1324        is specified in data.exf_clim (default = -1.9)
1325      - introduce runtime parameter windstressmax (default = 2.0) that is
1326        specified in data.exf
1327    o fix in pkg/thsice:
1328      - update Evap (Tsf changes) to be consistent with Latent heat flux
1329      - maintain snow precipitation unchanged (even if Tsf >=0).
1330     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1331    
1332    checkpoint52m_post
1333    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1334      this does not change any of the results, because myIter=0 in swfrac always
1335      lead to jwtype=2 (the default anyway), but the call makes little sense
1336      as a default
1337    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1338    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1339      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1340    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1341    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1342    o extending useSingleCpuIO option to work with new exch2 I/O format
1343      - old-style, missing-tile I/O is still accessible by defining CPP
1344        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1345    o monitor package can write to NetCDF files and/or STDOUT
1346    o fix re-definition bug in MNC_GRID_INIT_ALL()
1347    o doc/api_reference added
1348      - a framework for building an API Reference Manual using all
1349        the "protex" comments embedded in the code
1350      - see pkg/generic_advdiff, pkg/mnc for examples
1351    o MNC:
1352      - make myThid the last argument for all subroutines
1353      - new default for the grid files: NO halos
1354      - add useMNC and other run-time flags
1355      - separate per-file-group handling of the unlimited dimension
1356      - early initialization of MNC w/ flags read at the eeboot stage
1357        and lookup tables set in initialize_fixed
1358      - write all MNC output to a freshly-created directory
1359    o thermodynamics sea-ice (thsice) is now tested with testreport.
1360    o test exp. advect_cs: use the standard cs32 grid ; update output.
1361    o Added functionality to grdchk:
1362      pick global i,j,k position (or nearest wet) where to perform check.
1363    
1364    checkpoint52l_post
1365    o new land formulation:
1366      a) use ground enthalpy as prognostic variable to ensure exact
1367         energy conservation.
1368      b) account for water temperature and for latent heat of freezing
1369         in all processes (rain, run-off, ground storage)
1370      c) compute surface and ground temperature implicitly.
1371    o aim_v23 modification for new land model:
1372      a) Treat separately land / ocean / sea-ice surface fluxes
1373         to allow implicit computation of land & sea-ice surface temp.
1374      b) add snow precipitation.
1375    checkpoint52l_pre
1376    
1377    o fix problem (when 1 tile is empty) in min/max monitor.
1378    o fix bug in timeAve (u,vZetatave in common block)
1379    o no restoring terms under ice for pkg/seaice
1380    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1381    o bug fix for pkg/seaice pickups
1382    o change MNC call locations and add coordinate attributes
1383    o mask vorticity at the corner ; affects global_ocean.cs output
1384    o fix ini_curvilinear_grid ; test CS experiments with mpi
1385    o aim.5l_cs: modify sea-ice fraction input file ; update output
1386    o exf: Adding simple range check routine for exf fields after read
1387    
1388    checkpoint52k_post
1389    o removed top-level directory "diags"
1390      - we migrated these functions to pkg/timeave a long time ago
1391    o fixed bug introduced in pkg/monitor
1392    o accuracy ctrlprec = 32 insuffient for gradient checks using
1393      averaged fields (I/O via cost_averages)
1394      -> use ctrl.h in active_file*.F to control I/O precision.
1395    o paramter list of CALL ADTHE_MAIN_LOOP
1396    o added initial do_the_model_io to ecco
1397    o set all ...Freq to zero after cost_final
1398      taveFreq, dumpFreq, pChkptFreq
1399    o MAIN and ECCO differentiability restored
1400    
1401    checkpoint52j_post
1402    o fix nchklev in tamc.h for global_ocean...
1403    o Bringing flow and store directives up-to-date
1404    o Really weird thing!
1405      call do_the_model_io from the_main_loop with parameters
1406      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1407      TAF places a faulty re-call of initialise_varia
1408      after cost_final call which should not be there!
1409    checkpoint52j_pre
1410    
1411    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1412      error messages
1413    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1414    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1415      debug output
1416    o modfied mdsio_writefield.F to handle non-global files under exch2
1417    o update AIM Cubed-Sphere exp (aim.5l_cs):
1418      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1419    o update AIM Equatorial Channel exp:
1420      use standard aim_v23 pkg and change the SST fields to be more realistic.
1421    o globalFile now works with exch2
1422    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1423      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1424    o limit timeave output for hi-res integrations
1425    
1426    checkpoint52i_post
1427    o removed CPP_EEOPTIONS.h from verification/*/code
1428    o updated the tiling for global_ocean_pressure
1429    checkpoint52i_pre
1430    
1431    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1432      the old pkg/aim).
1433    
1434    checkpoint52h_pre
1435    o shortened offending lines in exch2_send_rx?.template
1436    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1437    o genmake2: add build & execute test for NetCDF code
1438    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1439      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1440    o added useSingleCPUIO flag to monitor.F and mon_out.F
1441    o added temporary hack for sea-ice dynamics on the cube:
1442      metric terms are ignored and it is assumed that
1443      there is no sea-ice on cube faces 1, 2, 4, and 5.
1444    
1445    checkpoint52f_post
1446    o added exch2 cube routines to pkg/exch2
1447    o modified hs94.cs-32x32x5 to use it
1448    o added new grid files to hs94.cs-32x32x5
1449    checkpoint52f_pre
1450    
1451    checkpoint52e_post
1452    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1453      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1454    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1455      to work with implicit vertical advection and AB ;
1456    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1457    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1458     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1459    checkpoint52e_pre
1460    
1461    o fix bug in impldiff when Nr=1 or Nr=2.
1462    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1463    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1464    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1465      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1466    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1467    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1468    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1469    
1470    checkpoint52d_post
1471    o re-tiled many expts to allow comparison in multi-processor mode
1472      - updated output accordingly
1473      - changed hs94.128x64x5 to use intial T from file rather than use the
1474        random number generator
1475    o add infrastructure in model routines for fizhi and gridalt packages
1476    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1477    o changes to permit hi-res, cubed-sphere, configuration
1478      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1479      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1480      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1481        of surface winds for the cube
1482      (A verification experiment, based on global_ocean.cs32x15, but with
1483       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1484       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1485       complete with example surface forcing files and matlab scripts to look
1486       at the output and compare it with that of global_ocean.cs32x15.)
1487    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1488       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1489       to conform to the common rule.
1490    o check-in the first version of the coupler + interfaces for multi-components
1491       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1492       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1493       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1494       - ocean and atmos. share the same horizontal grid (no interpolation).
1495       - exchanges between component and coupler is done in forward_step
1496    o new verification experiment, cpl_aim+ocn:
1497       coupled ocean - AIM atmosphere on cs32 grid.
1498    
1499    checkpoint52d_pre
1500    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1501    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1502    
1503    checkpoint52c_post
1504    o Fixing OPTIONS files for use of exf:
1505      - ALLOW_ECCO not needed
1506      - ECCO_CPPOPTIONS.h should not be included from
1507        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1508        as has been the case in the past
1509      - All cal/exf related options are currently set in
1510        single header file. Should remain so until we
1511        agree on a consistent new policy.
1512    o Removed all CPP options for cal package.
1513      cal has no more CPP options.
1514    o modified STOREs in GAD_ADVECTION
1515    o corrected key comp. for passkey
1516    
1517    checkpoint52b_post
1518    o new version: "thsice" of thermodynamic sea-ice pkg:
1519     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1520     - modify fluxes but do not change theta directly;
1521     - light cleaning of bulk_force pkg (still needed with thsice).
1522     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1523       + output_thsice.txt to test thsice & bulk_force pkgs.
1524    o put back grid & coriolis monitor output.
1525    checkpoint52b_pre
1526    
1527    o call "do_the_model_io" at the beginning (=> dump initial state)
1528    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1529    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1530      (need info on NUMBER_OF_PTRACERS)
1531    o missing PTRACERS headers in some routines
1532    o default tamc.h in pkg/autodiff supposed to crash
1533      to ensure proper customization
1534    
1535    checkpoint52a_post
1536    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1537      - moved surfaceTendencyTice from pkg/seaice to main code
1538      - subroutine FREEZE_SURFACE now limits only surface temperature
1539        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1540        => new output.txt for global_ocean.cs32x15 & global_with_exf
1541      - keep the old version of FREEZE for backward compatibility;
1542        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1543      - corresponding modifs for TAF directives
1544    o added surface flux output variables to TIMEAVE_STATVARS
1545    o time-averaged output for pkg/ptracers
1546    o fix problem with ECCO-related divided adjoint
1547      snapshot file was missing some ad-variables,
1548      but no warning issued by TAF
1549    
1550    checkpoint52a_pre
1551    o some bug fixes for #undef REAL4_IS_SLOW
1552    
1553    checkpoint52 = ecco_c52_e35
1554    o after testing adjoints of checkpoint51u_post
1555    
1556    checkpoint51u_post
1557    o this is the post-merge tag of the ecco-branch
1558      (needs another clean checkout and re-testing)
1559    o various natl_box_adjoint configs and results
1560      but no input fields
1561    o obcs adjoint not yet merged!
1562    o adding ECCO global 1x1 and 2x2 degree configs
1563    o updated/extended some store directives for seaice
1564    o pkg/ecco now containes ecco-specific part of cost function
1565    o top level routines the_main_loop, forward_step
1566      supersede those in model/src/
1567      previous input data.cost now in data.ecco
1568      (new namelist ecco_cost_nml)
1569    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1570    
1571    checkpoint51t_post
1572    o this is the pre-merge tag of the ecco-branch
1573    
1574    checkpoint51s_post
1575    o cleanup: removed various obsolete #define-s
1576    o pkg/grdchk
1577      - renamed 'ph-grd 3' to 'grad-res'
1578      - merged from ecco-branch
1579        (remaining bug fixes for obcs gradient checks)
1580      - additional high-precision output for testreport
1581        (grep for 'precision_grdchk_result')
1582    
1583    checkpoint51r_post
1584    o cleaned up or removed CPP_OPTIONS.h files
1585    o updated results for some of the tests to reflect the new
1586      optfiles (-ieee: -O0 instead of -O3)
1587    
1588    checkpoint51q_post
1589    o cd_code:
1590      - moved cd_scheme.F -> cd_code_scheme.F
1591      - separate read_checkpoint from cd_code_ini_vars.F
1592      - separated cd_code part from write_checkpoint
1593      - updated AD_SOURCE, generated .flow
1594      - added CD_CODE_VARS.h to the_main_loop
1595      - Moving cd_code specific store dir.s to pkg/cd_code
1596    o ctrl package totally restructured
1597      - pack/unpack now optional and decoupled from
1598        xx_/adxx_ I/O
1599      - ctrl_pack/unpack cleaned
1600        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1601      - confined inclusion of AD_CONFIG.h to where necessary.
1602    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1603    
1604    checkpoint51p_post
1605    o create initial cd_code package
1606      - WARNING: the initialization of fields within packages
1607        is broken because INI_FIELDS (where READ_CHECKPOINT is
1608        called) is called *before* PACKAGES_INIT_VARIABLES.
1609        This seems to be backwards since
1610        1) its important to initially zero the entire field including
1611           the "halo" region
1612        2) zeroing needs to be done *before* reading pickup info
1613           and the pickup call might or might not happen in any
1614           particular run
1615      - this needs an overhaul for R2
1616    o cleanup verification/*/code/GMREDI_OPTIONS.h
1617    o cleanup testreport
1618    
1619    checkpoint51o_post
1620    o bringing AD-related verif's up to date with genmake2
1621      - carbon/
1622      - global_ocean.90x40x15/
1623      - hs.94.1x64x5/
1624      - (front_relax/ )
1625    o (more) consistent directory structure for AD-related verif.'s
1626    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1627    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1628    o bug fix in find_alpha.F for MDJWF:
1629      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1630        change rho -> rho-rhoConst
1631      - replace call find_rho to find_rhonum
1632    o initialisation of rFlx extended to full array (required by TAF)
1633      and shifted to thermodynamics
1634    o removed PTRACERS.h in ptracers routine
1635    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1636    o Correcting initialisations for fVerU, fVerV.
1637    o helping TAF to recognize dependency on kUp for
1638      fVerU, fVerV
1639    o Replacing delZ by delR in pkg/ctrl/
1640    checkpoint51o_pre
1641    
1642    o undid all of cp51 pending some cleanups and discussion
1643    o added the [#include "AD_CONFIG.h"] statement to all files that need
1644       it for adjoint/tl #defines
1645     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1646     o removed tools/genmake since it no longer works
1647    
1648    checkpoint51n_post
1649    o modifications to make FREEZE flux visible to pkg/kpp
1650      - moved surfaceTendencyTice from pkg/seaice to main code
1651      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1652      - subroutine FREEZE now limits only surface temperature
1653        (this means new output.txt for global_ocean.90x40x15,
1654         global_ocean.cs32x15, and global_with_exf)
1655    o added surface flux output variables to TIMEAVE_STATVARS
1656    
1657    checkpoint51n_pre
1658    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1659    o added [#include "AD_CONFIG.h"] to all files that use the following
1660      defines:
1661      - ALLOW_ADJOINT_RUN
1662      - ALLOW_TANGENTLINEAR_RUN
1663      - ALLOW_ECCO_OPTIMIZATION
1664    
1665    checkpoint51m_post
1666    o incorporating changes to get TAMC/TAF working in genmake2
1667      - added new TAMC/TAF targets to the Makefile
1668      - various cleanups related to package handling
1669      - these changes should have no impact on the forward model
1670    
1671    checkpoint51l_post
1672    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1673     - faster algorithm for cal_addtime.F
1674     - higher precision arithmetic, where needed
1675     - pkg/exf *startdate variables changed from calendar date to
1676       model integration time
1677    
1678    checkpoint51l_pre
1679    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1680    o enable to apply restoring on S & T only in a latitude band.
1681    o update output (external_forcing_surf modif. change truncation errors)
1682       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1683    
1684    checkpoint51k_post
1685    o change default to: useNHMTerms=.FALSE.
1686     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1687       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1688     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1689        exp1, ideal_2D_oce
1690     - change data file of oceanic exp (leave the results unchanged for now)
1691       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1692    o set gravitySign automatically according to the vertical coordinate used
1693      (and change sign: back to "logical" value: +1 when R increases downward)
1694    o added an include barrier to the default CPP_OPTIONS.h and
1695      removed the #include "PACKAGES_CONFIG.h" from it
1696    o fix a bug in mom_fluxform (from chk51j_post)
1697    
1698    checkpoint51j_post
1699    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1700    o adjusted some flow directives (dynamics, thermodynamics)
1701    o added cubed-sphere case to test cost function
1702    o heckpoint_lev?_directives.h now include
1703      pkg-specific directives, whenever those are enabled.
1704    o Moving pkg-specific flow directives to corresponding pkg
1705      Moving pkg-specific differentiation list to corresponding pkg
1706      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1707      ---> conventions are
1708           - pkg_ad.flow
1709           - pkg_ad_diff.list
1710           - pkg_ad_check_lev?_dir.h
1711    
1712    checkpoint51i_post
1713    o merge of the branch-genmake2
1714      - knowingly breaks the older genmake
1715      - automatic generation of all ALLOW_${PKG_NAME} defines
1716      - new testreport supersedes older testscript
1717    o large number of package inclusion and header cleanups
1718    checkpoint51i_pre
1719    
1720    o new output for adjoin of global ocean vector invariant
1721    o fix for checkpoint of thermodynamic seaice and bulk_force
1722    o Steph gchem various cleanups
1723    
1724    checkpoint 51h_pre
1725    o fixed some single quotes
1726    o modify gchem pkg to be more versatile
1727    o modifications to clean up dic pkg
1728    o add pkg/cfc
1729    
1730    checkpoint51g_post
1731    o provide links for ARPACK and ADM*TLM
1732    o start removing verification/vero/
1733    o update AD-related stuff
1734      (in particular some IF-statements in model/src/ routines)
1735    o adding to verification/global_ocean.90x40x15/ adjoint of
1736      vector invariant setup
1737    
1738    checkpoint51f_post
1739    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1740    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1741      of tracer Green's fucntions for ocean inversion project.
1742    
1743    checkpoint51f_pre
1744    o Added on-the-fly spatial interpolation capability
1745        "USE_EXF_INTERPOLATION" to pkg/exf.
1746      - This is a temporary Cartesian-grid hack until
1747        the super-duper ESMF coupler becomes available.
1748      - See verification/global_with_exf/README for usage example.
1749      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1750        flags and modified pkg/seaice accordingly.
1751    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1752        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1753        non-local transport term.
1754    
1755    checkpoint51e_post
1756    o pkg/mom_vecinv:
1757      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1758      - add time-ave diagnostic of vorticity advection.
1759    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1760    o atmospheric geopotential: - include water vapor effect;
1761                                - use p^kappa in p* scaling.
1762    o land pkg: read initial state from files.
1763    o AIM : add stratospheric drag in the upper level
1764    
1765    checkpoint51d_post
1766    o change function ILNBLNK (=> last non-blank char.) to return zero
1767      (instead of the string length) when the string. char is empty
1768    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1769    o modif's to restore TAMC compatibility
1770      - avoid "_d" constructs in PARAMETER declarations
1771      - avoid interrupting lines by comment lines
1772    o Use cluster local disks for purely local I/O
1773      vs. globally visible disks needed for ctrl stuff
1774      (merged from ecco-branch)
1775      - new active_file_loc... and mdsio_..._loc routines
1776      - affected packages: autodiff, ctrl, grdchk, mdsio
1777    
1778    checkpoint51c_post
1779    o introducing integer flag debugLevel
1780      - debLevZero: suppress all output
1781      - debLevA: standard
1782      - debLevB: equivalent to current debugMode=.TRUE.
1783    o introducing pathname variable mdsioLocalDir for mdsio
1784      that can be specified at runtime
1785      (relevant for cluster I/O to local disk)
1786    `
1787    >>>checkpoint51b_post
1788    adjoint of ptracers
1789    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1790    o extended state in checkpoint_lev?, etc.
1791    o alternative ctrl/cost with tr1 or ptracer
1792    o new comlev1_bibj_ptracers
1793    o new ptracers.flow
1794    o made ptracers_forcing same as external_forcing_s
1795    o added verification for adjoint with ptracers
1796      - adm. grdchk fail so far
1797      - tlm. grdchk OK
1798      - checked tapelev/comlev recomputations: OK
1799    <<<checkpoint51b_pre
1800    
1801    checkpoint51a_post
1802    o added code for biogeochemistry package
1803      - new pkgs: dic, gchem
1804      - new subroutine in ptracers
1805    o modify code for biogeo packages
1806      - in model/src and pkg/ptracers
1807    
1808    checkpoint51
1809    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1810      - autodiff, ctrl, exf, grdchk, seaice
1811      kept separate packages
1812      - cost, ecco, obcs
1813    o updating verification/internal_wave, verification/lab_sea
1814      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1815    
1816    checkpoint50i_post
1817    o Preparing next differentiable checkpoint and sync
1818      of MAIN vs. ecco-branch
1819      - 1st step: this one is differentiable
1820      - 2nd step: next(! not this) checkpoint will have updated packages
1821                  from ecco-branch)
1822    
1823    checkpoint50h_post
1824    o new package "land": provide surface BC for AIM.
1825    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1826    o AIM: use true log-P extrapolation for near surface temp (= as in
1827        F.Molteni paper) ; update aim.5l_cs output.
1828    o New variable in PARM03 for more flexible pickups
1829    o somewhat cleaned package initialisation sequence for
1830      ctrl/ cost/ ecco/ in packages_... routines
1831    
1832    checkpoint50g_post
1833    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1834      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1835      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1836        made the default because of faster convergence than ADI
1837    
1838    checkpoint50f_post
1839    o exf totally restructured
1840      - replaced all exf_set_ routines by one generic exf_set_gen.F
1841        and made sure it's still differentiable
1842      - split exf_getffields.F into new exf_bulkformulae.F
1843      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1844      - updated adjoint/makefile and relevant verif. accordingly
1845    
1846    checkpoint50f_pre
1847     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1848          + change Evap over land. (update aim.5l_cs output)
1849     o added missing .cvsignores and made uniform across expts
1850     o changed configuration of tidal_basin_2d expt
1851     o added pkg/debug functions for tracing code in fatal crashes
1852     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1853     o new fn in pkg/monitor to stop model if solution grows too big
1854     o removed lots of single quotes from comments
1855    
1856    checkpoint50e_post
1857    o make KPP work with PTRACERS
1858     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1859       nearly a copy of kpp_transport_s
1860     - there is no analogue to SurfaceTendencyS, so I have to use
1861       gPtr(of the surface layer) instead
1862    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1863    checkpoint50e_pre
1864    
1865    checkpoint50d_post
1866    o change kpp output from multiple-record state files to single-record state
1867      files analogous to write_state.F
1868    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1869      analogous to the cg2d-related output.
1870    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1871      so that writing to internal file fn (with length 512) fails.
1872    checkpoint50d_pre
1873    
1874    checkpoint50c_post
1875    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1876    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1877    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1878    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1879    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1880    
1881    checkpoint50c_pre
1882    Merging from release1_p13:
1883    o bug fix for pkg/seaice dynamic solver
1884    o Added SEAICE_initialHEFF to pkg/seaice
1885    
1886    checkpoint50b_post
1887    o store u*,v* in gU,V instead of in guNm1,gvNm1
1888    o in order to put the momForcing out of the Adams-Bashforth:
1889      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1890      to timestep.F
1891    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1892    o re-generate output for highly sensitive test-exp:
1893       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1894    
1895    checkpoint50b_pre
1896    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1897    o corrected CPP option mismatch in exf_Bulk... functions for case
1898      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1899    
1900    checkpoint50a_post
1901    o Bug fix for merging between c50 and KPP.
1902      ikey was passed from thermodynamics to kpp_calc via
1903      common block rather than being recomputed in kpp_calc,
1904      in contradiction with new key itdkey.
1905      New key ikppkey created, and tamc.h headers updated.
1906    
1907    checkpoint50
1908    - 2nd step of merge with ecco-branch:
1909      merge changes in ecco-branch back into main trunk
1910    - bug fix in find_alpha
1911    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1912    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1913    - merged some sliced AD support routines
1914    
1915    checkpoint49
1916    merged from ecco-branch:
1917    o exf:
1918      - Enable initialisation of forcing fields to constant
1919        (runtime) values.
1920      - in exf_getffields.F
1921        Reduce i-/j-loop to interior domain, discarding overlaps.
1922        That also fixes wrong TAF-key computations for key_1, key_2
1923        with bulf formulae.
1924      - exf_init.F modify #ifdef for exf_init_evap
1925      - exf_getffieldrec.F, ctrl_getrec.F
1926        The following INT-usages are not safe:
1927          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1928          fldcount = int(fldsecs/fldperiod) + 1
1929        and were modified.
1930    o autodiff: checkpoint_lev...
1931      - updated storing for bulk formulae (some arrays were missing)
1932      - added state for seaice package
1933      - synchronized with main branch
1934    o DIVA:
1935      Modif.s in
1936      - the_main_loop.F
1937      - the_model_main.F
1938      and added cost_final_restore.F cost_final_store.F
1939      o With these changes, it is possible to fully separate
1940        the first forward run to compute the cost function (mdthe_main_loop)
1941        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1942        into separate model executions.
1943        This enables better tuning of DIVA to given queue sizes.
1944      o Loss of cost function value in consecutive DIVA runs is
1945        fixed by storing to 'costfinal' file.
1946      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1947        beginning/end of adjoint integration is accounted for.
1948      The current changes apply to TAF-1.4.26.
1949      TAF has one remaining bug, requiring one manual change
1950      (see MITgcm manual).
1951    o cal: synchronized between MAIN and ecco-branch
1952    
1953    checkpoint48i_post
1954    o Changes to restore differentiability of code w.r.t. previous tag
1955      (mostly adding new routines to make list and replacing
1956      pressure by totPhiHyd).
1957    o Updated and merged grdchk package
1958      - has both ADM and TLM checks
1959      - works for single- and multi-proc.
1960      - output cleaned
1961      - worked successfully for parallel DIVA
1962    o genmake:
1963      - Adding -platform=SP4
1964      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1965    o Modif. for DIVA:
1966      ctrl_unpack should not be called in intermediate DIVA interval.
1967      (similar thing would apply for active files such as
1968      tbar, sbar, psbar, which should not be reinitialised;
1969      only relevant for ecco-branch)
1970    
1971    checkpoint48h_post
1972    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1973    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1974    o Added SEAICE_initialHEFF to pkg/seaice
1975    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1976    
1977    checkpoint48g_post
1978    --- EOS:
1979    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1980      store total Potential in totPhyHyd for diagnostics & EOS.
1981    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1982    --- Pressure/geopotential gradient:
1983    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1984    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1985      ( changes results of global_ocean_pressure )
1986    o NLFS + z-coord.: add eta*Rho' contribution.
1987    o accurate phiHyd when using interface-W at the middle between 2 centers
1988     ( changes results of ideal_2D_oce )
1989    o includes r* 2nd term in potential gradient.
1990    
1991    checkpoint48f_post
1992    Merging from release1_p12:
1993    o Modifications for using pkg/exf with pkg/seaice
1994      - improved description of the various forcing configurations
1995      - added basic radiation bulk formulae to pkg/exf
1996      - units/sign fix for evap computation in exf_getffields.F
1997      - updated verification/global_with_exf/results/output.txt
1998    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1999      (SBO) core products, including oceanic mass, center-of-mass,
2000      angular, and bottom pressure (see pkg/sbo/README.sbo).
2001    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2002      to avoid negative values in shallow regions.
2003      - updated verification/natl_box/results/output.txt
2004      - updated verification/lab_sea/results/output.txt
2005    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2006    o Added useSingleCpuIO option (see PARAMS.h).
2007    o Updated useSingleCpuIO option in mdsio_writefield.F to
2008      work with multi-field files, e.g., for single-file pickup.
2009    o pkg/seaice:
2010      - bug fix in growth.F: QNET for no shortwave case
2011      - added HeffFile for specifying initial sea-ice thickness
2012      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2013    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2014      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2015    o pkg/seaice:
2016      - adjoint-friendly modifications
2017      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2018    
2019    checkpoint48e_post
2020    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2021    o dynamics: change definition of computational domain & adapt mom_fluxform
2022      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2023    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2024        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2025        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2026        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2027        inverted_barometer solid-body.cs-32x32x1
2028      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2029    
2030    checkpoint48d_post
2031    o in preparation for r*:
2032     a) use pre-computed gradient of hydrostatic potential:
2033        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2034     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2035        => affects results of glob_oce_pressure (different truncation error)  
2036      update output.txt of ideal_2D_oce & global_ocean_pressure
2037    
2038    checkpoint48d_pre
2039    o in preparation for r*:
2040      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2041      pass the 2 comp. of the grad. as arguments to momentum S/R.
2042      but for the moment, only used if it does not change the results.
2043    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2044    
2045    checkpoint48c_post
2046    Modifications in treatment of initial flux forcing controls
2047    to avoid extra storing of flux fields.
2048    
2049    checkpoint48c_pre
2050    o Added tidal_basin_2d experiment (currently 1D!)
2051    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2052    
2053    checkpoint48b_post
2054    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2055     (modification to pressure gradient not yet implemented)
2056    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2057      (for U & V) that are used for vertical advection of momentum.
2058    
2059    checkpoint48a_post
2060    o In preparation for r*, use temp. array to compute vertical transport
2061       in flux-form momentum pkg. => change results of few test-exp.
2062      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2063                        lab_sea, natl_box & plume_on_slope
2064    
2065    checkpoint48
2066    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2067    
2068    checkpoint47j_post
2069    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2070    o moved adexch from forward_step to addummy_in_stepping
2071    o added exch in ctrl_map_...
2072    o aveFreq.=0. at end of cost_final to avoid overwrite in
2073      reverse checkpointing loop
2074    o Yet more changes in gmredi:
2075      * adgmredi_calc_tensor
2076        avoiding all recomputation of gmredi_slope_limit
2077      * adgmredi_x/y/rtransport
2078        added flag for excessive storing to avoid recomp. of
2079        u/v/rtans, dTdx/y/z
2080        -> this is not really necessary and very memory-consuming
2081      * adgmredi_slope_psi:
2082        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2083      * gmredi_slope_limit
2084        re-activated full calculation of taperfct for case 'ac02'
2085    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2086    
2087    checkpoint47i_post
2088    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2089    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2090      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2091    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2092    o gmredi: fix few bugs.
2093    
2094    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2095    This will be a good checkpoint to plug into the ecco-branch.
2096    o few modif.'s to get latest version adjointed
2097      (mainly kick out code in ini_linear_phisurf)
2098    o modif's to run adjoint with exactConserv
2099    o case GM_BOLUS_ADVEC should be cleaned
2100      S/R gmredi_slope_psi should be cleaned
2101    o verification/carbon now has exactConserv=.TRUE.
2102    
2103    checkpoint47g_post
2104    o time-average AIM output: becomes independent from statvars time-average
2105      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2106    o After TAF bug fix:
2107      Tested adjoint of gmredi package.
2108      Tests were done with checkpoint47 rather than with latest
2109      checkpoint47f_post since the latter is broken for the adjoint
2110      verification/carbon/ contains both ADM and TLM gradient checks.
2111    Here they are, before they get changed/lost/stolen.
2112    Mostly modif.'s to fix numerical sensitivities.
2113    Gradient checks OK for
2114    - GM_taper_scheme:
2115      * clipping
2116      * ac02
2117      * linear
2118      * glw91
2119      * dm95
2120      * ldd97
2121    - GMREDI_OPTIONS:
2122      * GM_VISBECK_VARIABLE_K
2123      * GM_NON_UNITY_DIAGONAL
2124      * GM_EXTRA_DIAGONAL
2125      * GM_BOLUS_ADVEC
2126    in conjunction with data.gmredi parameters to be checked in
2127    in a few minutes under verification/carbon/code/
2128    
2129    checkpoint47f_post
2130    Merging from release1_p10:
2131    o modifications for using pkg/exf with pkg/seaice
2132      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2133        and SEAICE_EXTERNAL_FLUXES
2134      - pkg/exf CPP options EXF_READ_EVAP and
2135        EXF_NO_BULK_COMPUTATIONS
2136      - usage examples are Experiments 8 and 9 in
2137        verification/lab_sea/README
2138      - verification/lab_sea default experiment now uses
2139        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2140    
2141    checkpoint47e_post
2142    o created a tag prior to creating a branch
2143    
2144    checkpoint47d_post
2145    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2146      at the bottom boundary had an erroneous half slip boundary condition
2147    o added bottom drag and no slip boundary condition capabilities to
2148      oceanic pressure coordinates code
2149    o added new verification experiment global_ocean_pressure, this experiment is
2150      also described in the tutorial section of the manual
2151    checkpoint47d_pre
2152    
2153    checkpoint47c_post
2154    o Added a verification experiment for a global cubed-sphere ocean run
2155      -  verification/global_ocean.cubed32x32x30
2156      -  uses pkg/therm_seaice and pkg/bulk_forcing
2157    
2158    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2159    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2160      when using P-coordinate; only implemented for atmospheric config.
2161    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2162      NOTES: requires option NONLIN_FRSURF to be "#define".
2163    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2164    
2165    checkpoint47b_post
2166    Merging from release1_p9:
2167    o pkg/seaice
2168      - removed GOTO's and added taf directives
2169      - double precision constants to reduce the g77 (Linux)
2170        to F77 (SGI) differences reported in release1_p8
2171    o tools/genmake
2172      - added SGI options
2173    o verification/testscript
2174      - updated to that of checkpoint47a_post
2175    o verification/global_ocean.90x40x15/input/eedata
2176      - modified for SGI f77 compatibility
2177    o verification/lab_sea
2178      - added description of sea-ice model
2179      - added missing matlab routines
2180      - added test of thermodynamics parallelization
2181    
2182    checkpoint47a_post
2183    o new pkg: aim_v23
2184     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2185       for now, keep the same surface forcing as before.
2186     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2187     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2188     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2189    o add diagnostic of surface correction term in monitor output
2190    
2191    o bulk_force and therm_seaice
2192    - Two packages:  bulk_force (Bulk forcing)
2193      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2194    - Earlier integration from Stephaine Dutkiewicz
2195      and Patrick Heimbach.
2196    - Two ifdef statements for compile time,
2197       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2198    
2199    checkpoint47
2200    differentiable version of checkpoint46n_post
2201    o bug fix in quasihydrostaticterms
2202    o * "clean" adjoint code (in terms of extensive recomputations)
2203        can now be obtained for all GMREDI options (i.e. for
2204        - GM_VISBECK_VARIABLE_K
2205        - GM_NON_UNITY_DIAGONAL
2206        - GM_EXTRA_DIAGONAL
2207        - GM_BOLUS_ADVEC )
2208      * However, wrong gradient check problem remains unsolved.
2209      * New CPP options have been introduced for different
2210        tapering schemes
2211    o external_fields_load now part of differentiation list
2212    o pressure needs multiple storing;
2213      would be nice to have store_pressure at beginning or
2214      end of forward_step, e.g. by having phiHyd global (5-dim.)
2215      (NB: pressure is needed for certain cases in find_rho,
2216      which is also invoked through convective_adjustment).
2217    o recomputations in find_rho for cases
2218     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2219    o #define ATMOSPHERIC_LOADING should be differentiable
2220    o ini_forcing shifted to begining of initialise_varia
2221    o Incorporating QNVS line search routines into MITgcm
2222      (this is separate code, and therefore not under pkg)
2223      lsopt/, optim/
2224    o Updated verification/carbon/
2225      - #define GM_VISBECK_VARIABLE_K
2226      - GM_taper_scheme    = 'ldd97'    
2227    
2228    checkpoint46n_post
2229    Merging from release1_p8:
2230    o verification/natl_box:
2231      updating new external_fields_load routine
2232    o New package: pkg/seaice
2233      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2234      The sea-ice code is based on Hibler (1979-1980).
2235      Two sea-ice dynamic solvers, ADI and LSR, are included.
2236      In addition to computing prognostic sea-ice variables and diagnosing
2237      the forcing/external data fields that drive the ocean model,
2238      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2239      The implied surface heat flux is then stored in variable
2240      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2241      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2242      non-local transport term.  Because this call precedes model
2243      thermodynamics, temperature under sea-ice may not be "exactly" at
2244      the freezing point by the time theta is dumped or time-averaged.
2245      N.B.: fairly large differences in accuracy occur across
2246            different platforms/compilers; comparison between
2247            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2248            generated output gives:
2249       T           S           U           V
2250      C D M    c        m  s        m  s        m  s        m  s
2251      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2252      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2253      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2254    
2255      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2256    o GAD:
2257      - generated new common blocks to account for call of
2258        same gad routines with differing traceridentities
2259        (needed to modify tracerIdentity indices in GAD.h)
2260      - generated separate common blocks for case useCubedSphereExchange
2261        (Department of Futurology)
2262      - parameter lists to gmredi_?transport: added tracerIdentity
2263      - added new key indices to tamc.h
2264    o external_fields_load:
2265      - added this routine to TAF list
2266      - needed to make some common blocks global and additional storing
2267        along the same lines as exf package (checkpoint_lev?_directives.h)
2268    o exf:
2269      updated external forcing package
2270      - bug fixes carried over from ecco-branch
2271        (missing OBCS_OPTIONS.h in two routines)
2272      - enable easy to use "no forcing".
2273      - added exf I/O for atmospheric loading
2274      - added exf I/O for runoff data
2275      - transfered scaling between exf <-> MITgcm to exf namelist
2276    o Adding new verification experiment global_with_exf.
2277      This verification experiment is almost identical to the
2278      global_ocean.90x40x15 experiment, except that it uses
2279      the exf (and cal) package instead of the
2280      external_fields_load routine (cf README file).
2281    
2282    checkpoint46m_post
2283    o modified testscript to return -- when there are no lines of "%MON" output
2284    o added new flag "quasiHydrostatic" for QH mode
2285      and new routine quasihydrostaticterms()
2286    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2287      New routine: mom_u_coriolis_nh()
2288    o fixed sign of non-hydrostatic metric terms in u and v equations.
2289      Depend on correct sign of gravitySign.
2290    o added work.pc* to .cvsignore in aim directories using ifc
2291    o introduced flag for controllin non-hydrostatic metric terms
2292    o removed gravitySign from PARM04
2293    o switched to g77/ifc from pgf77 in aim experiments
2294    
2295    checkpoint46l_post
2296    o made convective adjustment work with pressure coordinates:
2297     - changed the direction of k-loop in convective_adjustment.F for the
2298       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2299     - adjusted the reference pressure k-index in convective_adjustment.F
2300     - adjusted the convection condition in convect.F (in analogy to
2301       calc_ivdc.F)
2302     - convective_adjustment no longer computes anything on the halos
2303     - removed the warnings about negative salinity from find_rho.F and
2304       find_alpha.F; instead the new routine look_for_neg_salinity, called
2305       at the beginning of find_rho, find_alpha, and find_beta, does a
2306       check of the entire slice, if CPP-option
2307       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2308    checkpoint46l_pre
2309    
2310    checkpoint46k_post
2311    o fixed the verification/global_ocean.90x40x15 experiment:
2312     - new bathymetry (the world according to A., JMC, and M.)
2313     - new initial fields and forcing fields (*.bin files)
2314     - new POLY3.COEFFS (for the next release one should switch to a full
2315       equation of state: JMD95P or MDJWF)
2316     - fixed several errors and redundancies in the data file
2317     - experiment uses looped cells
2318     - added matlab directory with diagnostic scripts for plotting of output
2319    
2320    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2321     - read AIM physics parameters from a file (data.aimphys)
2322     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2323    
2324    checkpoint46j_post
2325    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2326    o move wVel computation at the end of the time step, in S/R integr_continuity
2327    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2328    o update timeave pkg for wVel diagnostic.
2329    checkpoint46j_pre
2330    
2331    checkpoint46i_post
2332    o Clean up AIM package (and keep the results unchanged):
2333      include CPP_OPTION and use IMPLICT NONE in all routines ;
2334      declare all the variables _RL ; use _d 0 for all numerical constants.
2335      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2336    
2337    checkpoint46h_post
2338    o cleaned up the use of rhoNil and rhoConst.
2339      - rhoNil should only appear in the LINEAR equation of state, everywhere
2340        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2341        and the dynamical equations are all divided by rhoConst
2342    o introduced new parameter rhoConstFresh, a reference density of fresh
2343      water, to remove the fresh water flux's dependence on rhoNil. The default
2344      value is 999.8 kg/m^3
2345    o cleanup up external_forcing.F and external_forcing_surf.F
2346      - can now be used by both OCEANIC and OCEANICP
2347    checkpoint46h_pre
2348    
2349     Added code to convert surface volume flux (fresh water) into
2350     a mass flux when using P coordinates in the ocean (OCEANICP).
2351     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2352    
2353    checkpoint46g_post
2354    o Include a new diagnostic variable phiHydLow for the ocean model
2355      - in z-coordinates, it is the bottom pressure anomaly
2356      - in p-coordinates, it is the sea surface elevation
2357      - in both cases, these variable have global drift, reflecting the mass
2358        drift in z-coordinates and the volume drift in p-coordinates
2359      - included time averaging for phiHydLow, be aware of the drift!
2360    o depth-dependent computation of Bo_surf for pressure coordinates
2361      in the ocean (buoyancyRelation='OCEANICP')
2362      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2363        Theta, Salinity, and Pressure in the parameter list. This routine is
2364        presently contained in find_rho.F. This routine does not give the
2365        correct density for 'POLY3', which would be a z-dependent reference
2366        density.
2367    o cleaned up find_rho
2368      - removed obsolete 'eqn' from the parameter list.
2369    o added two new verification experiments: gop and goz
2370      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2371    checkpoint46g_pre
2372    
2373    checkpoint46f_post
2374    o Enable tangent linear (forward mode) gradient checks:
2375      - extended active file handling to g_... files
2376      - added TANGENT_SIMULATION to theSimulationMode
2377      - extended grdchk package accordingly
2378    o added tangent linear setup in verification/carbon/code_ftl
2379    o added adjoint setup in verification/front_relax/code_ad
2380    
2381    checkpoint46e_post
2382    o Added new equation of state -> MDJWF
2383      - EOS of McDougall et al., 2002, JAOT, submitted
2384      - caveat: the equation of state is only valid for a smaller (more
2385        realistic?) range of values than JMD95P/Z and UNESCO
2386      - added masks to the calculation of pressure in store_pressure
2387      - added more check values for density in check_eos (ini_eos.F), some of
2388        the old check values are out of the range of the MDJWF-eos, so don't
2389        expect perfect matches for those
2390    checkpoint46e_pre
2391    
2392    checkpoint46d_post
2393    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2394      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2395      case of pressure coordinates. eosType='JMD95Z' in
2396      combination with buoyancyRelation='OCEANICP' now causes an error.
2397    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2398      in find_alpha/beta.
2399    checkpoint46d_pre
2400    
2401    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2402      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2403    
2404    checkpoint46c_post
2405    o Changes necessary for ocean in p-coordinates
2406     -  Added new buoyancy relation = 'OCEANICP'
2407     -  Added new parameters = gravitySign (this used to be contained inside
2408        the factor dRdZ which I added when we first switched to R coordinates).
2409     X GM/Redi is not compatible (yet)
2410     X bottom drag and no-slip need to be debugged.
2411    checkpoint46c_pre
2412    
2413    checkpoint46b_post
2414    o Added new equation of state -> JMD95Z and JMD95P
2415      - EOS of Jackett and McDougall, 1995, JAOT
2416      - moved all EOS parameters into EOS.h
2417      - new routines ini_eos.F, store_pressure.F
2418    o Added UNESCO EOS, but not recommended because it requires
2419      in-situ temperature (see JMD95)
2420    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2421      unesco.f to be used with POLY3
2422    checkpoint46b_pre
2423    
2424    checkpoint46a_post
2425    o Added (atmospheric) pressure loading
2426      - new field in FFIELDS.h, etc...
2427      - new cpp flag ATMOSPHERIC_LOADING
2428    o Changed hFacC to _hFacC in calc_phi_hyd.F
2429    o Added SHORTWAVE_HEATING to some files for consistency
2430    checkpoint46a_pre
2431    
2432    checkpoint46
2433    further merges from release1_p5
2434    o new ctrl package
2435      - adopted from ECCO environment to enable optimization
2436      - added Eliassen Palm fluxes to controls
2437    o added Eliassen Palm flux controls to gradient check package
2438    o cost package
2439      - Compatible with new ctrl package
2440      - added Eliassen Palm cost hooks
2441      - modif's of existing cost functions
2442    o Adjoint-related bug fixes in kpp:
2443      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2444      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2445    o autodiff package
2446      - flow directives:
2447        + new for S/R do_the_model_io
2448        + enhanced for S/R checkpoint
2449        + new gmredi.flow
2450      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2451        disable adcommon.h/g_common.h by default.
2452      - fixed problem for adjoint of global_max
2453    o modified verification/carbon/
2454    o New setup for adjoint of global_ocean
2455    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2456    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2457    o incorporated hooks for sponge layer code (external_forcing.F)
2458    
2459    checkpoint45d_post
2460    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2461    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2462      (affects plume_on_slope "cg2d" output)
2463    o add new parameter deltaTfreesurf for free-surface time stepping
2464    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2465    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2466    o change phiMin in exp1 (to agree with documentation)
2467    o add new flags:
2468     - T,S forcing inside/outside Adams-Bashforth
2469     - turn off temp,salt advection and/or forcing
2470     - for each tracer, define internal flag for multiDimAdvection & A-B
2471    o monitor: change definition of KE to check conservation of Energy
2472    
2473    checkpoint45c_post
2474    o Removed f90 comments ("!")
2475    o Modified initialisations to enable exf package for MITgcm
2476      (without invoking ECCO_PACKAGE).
2477    o modifications to gradient check package (Martin Losch)
2478      - enable centered differences
2479      - modified format of standard output
2480    
2481    checkpoint45b_post
2482    o cleaned exchange calls in cg2d
2483    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2484    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2485      to configure barotropic setup (Martin Losch)
2486    o moved some initialisations within bi,bj loop in dynamics
2487      (TAF flow dependency)
2488    o in initialise_varia, moved call packages_init_variables
2489      before convective_adjustment_init
2490      (corresponding adjustment of TAF tape initialisation).
2491    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2492    
2493    checkpoint45a_post
2494    o compute Rho over the whole domain (extend iMin,jMin indices)
2495    o specific exchange for X-slice domain (case Ny=1)
2496    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2497    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2498    
2499    checkpoint44h_post = checkpoint45
2500    o Fix to restore differentiability:
2501      place at which packages_init_variables is called in
2502      initialise_varia is crucial for reverse control flow.
2503    o modifications in GMRedi to enable stable adjoint
2504      (corresponding modif's in thermodynamics, dynamics)
2505    o added missing hook for sponge layer code in external_forcing
2506    o modified test cost functions
2507    o storing in gad_advection (plus removal of write(0,*)!
2508    o missing headers TR1.h added in convective_adjustment routines
2509    o errorMessageUnit set non-equal zero in eeboot
2510      (conflict on some platforms, e.g. IBM SP3)
2511    o modified carbon verif.
2512    
2513    checkpoint44h_pre
2514    o vertical grid option: allow to put the Interface at the middle between
2515      2 cell-centers ; replace delZ in pkg/kpp by drF.
2516    o GM Advective form: Tracers are advected using the residual transport (=
2517      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2518    
2519    checkpoint44g_post
2520    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2521      results) ; ifdef missing in thermodynamics.F
2522    
2523    checkpoint44f_pre,checkpoint44f_post
2524    o added PTRACERS package
2525      This allows an arbitrary number of passive tracers to be integrated
2526      forward simultaneously with the dynamicaly model.
2527      + Implemented so far:
2528        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2529        - I/O and checkpointing
2530        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2531      + Not implemented so far:
2532        - KPP
2533        - OBCS
2534      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2535        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2536        line in data.pkg.
2537      + This package is disabled by default since it increases storage.
2538    
2539    
2540    o testscript: added -cleanup option
2541    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2542                 b) enable to filter 2D fields.
2543    
2544    checkpoint44e_pre,post
2545    o re-wrote convective adjustment to use pre-calculated weights
2546      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2547      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2548      Original calls to convect() still in place.
2549    
2550    chkpt44d_pre,post
2551    o added missing EXCLUDE_MONITOR flags
2552    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2553      (incompatible typ in MIN/MAX expressions caused problems
2554      on IBM SP3)
2555    o in genmake added variable MAKEDEPEND
2556      plus resetting for case SunOS
2557    o added timer_stats.c routine for IBM SP3
2558    o removed variables in dynamics
2559    !!! I forgot to create tag chkpt44d_pre !!!
2560    !!! But chkpt44d_pre = chkpt44c_post    !!!
2561    
2562    o real fresh water flux implemented with non-linear free-surface.
2563    
2564    chkpt44c_pre,post
2565    o few fix (mask in shap_s2, EmPmR in external_field_load,
2566      USE_NATURAL_BCS in solve_for_P);
2567    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2568    
2569    checkpoint44b_pre/_post
2570    o merge of relevant stuff from the ecco-branch:
2571      - genmake: removed $S64 overwrite for case SunOS
2572      - pkg/exf: update and corrections for field swapping and obcs
2573      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2574                  harmonized between ECCO and MITgcm
2575      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2576                      updated checkpointing_lev... lists for obcs
2577      - model/src: minor changes in forward_step, plot_field
2578                   added directive for divided adjoint in the_main_loop
2579      - pkg/mdsio: added mdsio_gl_slice
2580    
2581    o check parameters & config (chkpt44a_pre,post)
2582    o OBC and NonLin_FrSurf.
2583    
2584    checkpoint44
2585    o fix bug in mom_vi_del2uv
2586    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2587    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2588    o update AIM experiments (NCEP input files)
2589    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2590    o added some stuff for AD
2591    
2592    checkpoint43
2593    o added two new advection tests
2594    o added global 4x4 degree ocean test
2595    o added test of H&S94 with free surface on cube
2596    o some final mods for gradient check, adjoint,...
2597    
2598    checkpoint42
2599      Fixed AD-related problems:
2600    o Store directives up-to-date with re-arranged Adams-Bashforth
2601      (mainly thermodynamics.F)
2602    o New store directives for multi-dim. advection schemes
2603      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2604      * new common block and key passkey
2605      (mainly gad_advection.F)
2606    o Modified store directives for split of dynamics/thermodynamics
2607      for the case ALLOW_KPP
2608    o Cleaned argument list for timestep_tracer.F
2609    
2610    checkpoint41
2611    o re-formatted/added comments in prologues of key subroutines
2612      to work with protex
2613    
2614    checkpoint40
2615    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2616    o added FLT (floats) package from Arne along with demo. experiment
2617    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2618      implementation of forward-in-time forcing terms
2619    o more mods for non-linear free-surface including new variable
2620    o modified multi-dim method to work on cube
2621    o bug fix in KPP (from DM)
2622    
2623    checkpoint40pre9
2624    o added DST advection schemes
2625    o fix MPI bug on SGI's
2626    o modifications for non-linear free-surface
2627    o fixed conditionals for fixed flow/passive tracer only mode
2628    o added tension/strain form of stress tensor
2629    o changes to commenting of arguments for TAF/TAMC
2630    o added/updated many matlab scripts
2631    o added multi-dimensional advection method for tracers
2632      
2633    checkpoint40pre8
2634    o new package rw/
2635      Added method for dumping intermediate local arrays:
2636      mdsio_writetile - same as mdsio_writefield except works from inside
2637                        bi,bj loop
2638      mdsio_writelocal - same as mdsio_writetile except works for local
2639                         arrays
2640      write_local_r? - higher-level wrapper for mdsio_writelocal
2641      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2642      Example given at end of mom_vecinv.F that dumps some local arrays.
2643    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2644      control flux-form versus vector invariant code.
2645      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2646      or genmake -DISABLE ...
2647    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2648      (additional storing is now needed for case vecinv;
2649      currently nothing implemented to switch this storing off
2650      in case fluxform is used since no CPP flag available).
2651    
2652    checkpoint40pre7
2653    o bug fix in dynamics.F
2654      calc_viscosity called before k=1,Nr loop.
2655    o added some #ifdef's ALLOW_PASSIVE_TRACER
2656    o cleaned initialisations in ctrl_map_ini
2657      related to TAF
2658    
2659    checkpoint40pre6
2660    o split dynamics into thermodynamics & dynamics
2661    o corresponding split of calc_diffusivity into
2662      calc_diffusivity, calc_viscosity
2663      (kpp_calc_diff, kpp_calc_visc).
2664    o Added diffkr, kapgm to control variables
2665    o bug fix in gmredi_slope_limit for ldd97
2666    
2667    checkpoint40pre5
2668    o proper initialization of Adams-Bashforth time stepping
2669      + uses forward step for very first step of model (iter=0)
2670    o re-generated *all* output since almost all output is modified by this
2671      change (sorry but we've been putting this one off for about 2 years)
2672      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2673        *not* regenerated since they are already out of date and I don't
2674        want to create the impression that they are suddenly working.
2675    o removed KAP stuff for DEC's
2676    o modified/added many .cvsignore files in */code and */input
2677    o added new expt "solid-body.cs-32x32x1"
2678      + this uses an alternative form of ini_curvilinear_grid.F which
2679        is not necessarily any better than the current one...
2680    
2681    checkpoint40pre4
2682    o added re-initialisations of utrans,vtrans,rtrans in
2683      calc_common_factors which are crucial for TAF.
2684    o extended iMin,jMin range for calc_common_factors,
2685      calc_diffusivity
2686    o added option ALLOW_PASSIVE_TRACER
2687    o a few minor updates and fixes
2688    
2689    checkpoint40pre3
2690    o created calc_gtr1.F for gad package
2691    o split the_main_loop and re-introduced forward_step
2692    o some recomputations of nIter0 for TAMC
2693    
2694    checkpoint40pre2
2695    o Updated to latest branch of AJA, JMC
2696    o Added gradient check package
2697    o Added routines for passive tracer handling
2698    o Added carbon sequestration sensitivity experiment
2699    
2700    checkpoint39
2701     o Modifications and fixes to support TAMC
2702       (mainly missing or wrong directives)
2703     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2704       in addummy_in_stepping
2705     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2706     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2707     o Included following packages:
2708       cal: calendar
2709       exf: external forcing
2710       ecco: essential routines to control use of cal, exf
2711             (NB: this is not the full ECCO environment)
2712     o disabled some packages by default in genmake
2713    
2714    checkpoint38
2715     o see notes_c37_adj.txt
2716     o corrected wrong layer index in external_forcing_t
2717     o replaced the_main_loop/forward_step by the_main_loop
2718     o removed forceoutput from write_state
2719       (replaced criteria for initial/final state)
2720     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2721    
2722    checkpoint37
2723     o mdsio.F routine split and packaged in pkg/mdsio
2724       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2725        used unless genmake -disable=mdsio)
2726     o allow a more precise surface-geopotential gradient for the atmosphere
2727       taking into account the change in space of Alpha (=1/rho) at the surface.
2728     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2729       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2730     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2731       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2732       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2733     o Time-Average diagnostics defined as a pseudo package "timeave".
2734     o pickup files : old pickup (before c35) did not work with new code (c35
2735       and after) unless activating 2 commented lines in initialise-varia.
2736     o Non-Hydrostatic pickup file Pb fixed.
2737     o bug with Rigid-lid version (since c35) fixed.  
2738    
2739    checkpoint36
2740     o implement Crank-Nickelson barotropic time-stepping
2741     o recover Time-Average diagnostics
2742     o fix Pb in checkpoint (PR#19)
2743     o AIM become a standard package ; clean unused CPP_kees
2744    
2745    checkpoint35
2746     o subtantial rewrite of dynamics.f
2747     o allows staggered time-stepping
2748     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2749     o added bottom drag (linear + quadratic)
2750    
2751    checkpoint34
2752     o Modified exchange routines for correct reverse simulation.
2753     o Added verification output to comply with bug fix in impldiff.F
2754       as of c33 (exp2, natl_box).
2755     o Corrected store directives in dynamics.F
2756     o Corrected array boundaries in impldiff.F
2757     o Corrected array dimensions in gmredi.
2758       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2759     o Added routine GLOBAL_SUM_INT to global_sum.F
2760     o Added mdsio_gl.F for ECCO purposes.
2761    
2762    checkpoint33
2763     o Fixed bug in lower BC in impldiff.F
2764     o Fixed confusion about units of forcing arrays in FFIELDS.h
2765       namely Fu,Fv,Qnet,Qsw,EmPmR:
2766       - Removed verification/natl_box/code/external_fields_scale.F
2767         (did not differ from that in model/src)
2768       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2769         (see FFIELDS.h for description)
2770       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2771         kpp_calc.F and kpp_transport_t.F
2772       - Removed model/src/external_fields_scale.F and calls to it
2773       - verification/natl_box uses flux data with "atmospheric" sign so
2774         a special version of external_fields_load.F is used to
2775         change the data as it's read in. This way, the arrays
2776         have the right units and signs at all times tha a user could
2777         possibly use them.
2778     o Corrected genmake to delete a temporary file during configuration
2779    
2780    checkpoint32
2781     o Scaling of forcing fields moved from external_forcing.F to
2782       external_fields_scale.F, called directly after loading fields.
2783     o Surface relaxation terms added to surface tendency fields in
2784       extra subroutine.
2785     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2786       fields.
2787     o Changes in GMRedi to comply with packaging structure.
2788     o Modifications and bug fixes in KPP package.
2789     o Verification experiment for KPP added (verification/nat_box/)
2790    
2791    checkpoint31
2792     o Packages interface brought in line with defined standard
2793       -> new routines packages_...F
2794       -> changes in initialise_fixed.F, initialise_varia.F
2795       -> enables initialisation interface for ECCO package
2796     o Rescaling of external forcing fields immediately after read
2797       (removed from external_forcing.F)
2798       -> new: surface_fields_scale.F
2799       -> affects ini_foorcing.F, external_fields_load.F
2800     o Computation of surface tendencies before tendency updates.
2801       -> new: external_forcing_surf.F
2802     o Change of variable names useGMRedi, useKPP, useECCO
2803     o Further changes in dynamics.F, impldiff.F for TAMC
2804     o Tested for experiments 0, 2, 4.
2805       - not yet tested for GMRedi.
2806       - not yet tested for KPP.
2807    
2808    checkpoint30
2809     o Updates for OBCs
2810     o New experiment for test OBCs (internal_wave)
2811     o New output.txt in verification/exp4/results/
2812     o Updates for KPP: calculation of viscosity corrected, new variables
2813       kpp_dumpFreq and kpp_taveFreq
2814     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2815       and entry for T90 in genmake
2816    
2817    checkpoint29
2818     o packaged KPP and GM/Redi
2819    
2820    checkpoint28
2821     o Corrected initialization of hFacMin for difference vertical coordinates
2822     o Modified calculation of partial cell thickness to more robust algorithm
2823     o config_summary.F: replaced write_1D_... by write_0D_...
2824       read_write.F: added subroutines write_0D_...
2825     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2826       included some initialisations required for TAMC.
2827     o routine calc_isoslopes: modified sqrt computation to make it
2828       differentiable for zero argument.
2829     o routines dynamics, impldiff:
2830       included store directives and tape key computations required for TAMC.
2831     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2832    
2833    checkpoint27
2834     o fixed calc_isoslopes() to so that cancellation of terms in tensor
2835       formulation works properly with variable resolution.
2836     o restructured the calling tree between the_model_main() and dynamics()
2837     o split initialise() into initialise_fixed() and initialise_varia()
2838     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
2839       in new routine ini_psurf()
2840    
2841    checkpoint26
2842     o moved some #ifdef in optional routines to encompass everything
2843       except the argument declarations. This was using up some memory.
2844     o fixed macros like _ADT to work with both versions of Linux cpp
2845     o cleaned up some unused and uninitialized variables
2846       (helps when debugging with strict compile options)
2847     o split up CPP_EEOPTIONS.h into options and macros
2848       (macros are now in eesupp/inc/CPP_EEMACROS.h)
2849     o patch for 2 processor JAM mode
2850    
2851    checkpoint25
2852     o updates for OBCs and NH
2853     o dramatically reduced memory usage
2854     o added "JAM" routines for use on Artic network
2855     o parameterization of convection by implicit vertical diffusion
2856     o added a diagnostic of convective index
2857     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
2858       (this is was partly for OBCs and NH but also in anticipation of
2859        an explicit free-surface option)
2860     o initial state input files for U and V
2861    
2862    checkpoint24
2863     o Removed some spurious "REAL"s
2864     o Updated KPP to latest version from JPL
2865     o Added a COS(latitude) in horizontal viscosity
2866    
2867    checkpoint23
2868     o Added del^4 diffusion for salt and temperature
2869     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2870    
2871    checkpoint22
2872     o Made many small changes: implicit none, format(i5), etc...
2873     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2874    
2875    checkpoint21
2876     o Introduced new I/O package that supports direct-access records (mdsio.F)
2877     o Split-up mid-level I/O routines
2878     o Updated input data for experiments 0,1,2,4 and 5
2879     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2880    
2881    checkpoint20
2882     o Tidied up open-boundaries some more
2883     o Added non-hydrostatic code
2884     o Fixed some input data
2885     o Modified MPI start-up to work in "coupled" context.
2886    
2887    checkpoint19
2888     o Tidied up directory structure for verification experiments.
2889     o Added new code for open boundaries.
2890     o Corrected advective terms near boundaries.
2891     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2892     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2893     o Split default parameters out of ini_parms.F into set_defaults.F.
2894    
2895    checkpoint18
2896     o Further changes for optional code generation with
2897       CPP - ugh!
2898    
2899    checkpoint17
2900     o Beginning to incorporating modularity
2901       for supporting atmos. and ocean configs.
2902     o Small changes for TAMC complinace
2903     o New ultra simple test case. Barotropic box
2904       configuration "exp0".
2905    
2906    checkpoint16
2907     o Minor changes to exchange routines to support
2908       accumulation in reverse mode. Adjoint of an
2909       assignment is an addition.
2910     o Changes to support compilation by TAMC (LR(1)
2911       syntax) and by g77 under Linux ( 72 character
2912       limit ).
2913    
2914    checkpoint15
2915     Rewrote exchange routines to allow
2916     o General tile <-> tile connectivity.
2917     o TAMC reverse mode flag ( is this really needed? )
2918     o Variable width overlap and exchange region widths.
2919     o Hooks for sharing data via DMA, Arctic, Memory Channel,
2920       shmput/shmget, VIA, SYSV shmem and every other cool
2921       communication method.
2922    
2923    checkpoint14
2924     Consistent isomorphism chages made. These allow dynamical core
2925     to support both pressure and meters as a vertical coordinate.
2926    
2927    checkpoint13
2928     Release which corrects global_max problem and a couple
2929     of KGM time-averaging diagnostic errors. Also contains
2930     a double-gyre experiment setup as well as the baseline
2931     4 degree global template. The double gyre template is
2932     organised to allow it to be applied automatically to
2933     the baseline configuration.
2934    
2935    branch-point-rdot
2936     A few tidy-ups have been made bt the real point of this
2937     check-point (excuse the pun) is to allow a branch to be
2938     made for the purposes of adding the rDot alterations.
2939     I don't want to commit the rDot to the main-trunk until
2940     we've actually tested it...
2941    
2942    checkpoint12
2943     Tidy up and added generic genmake script (formerly
2944     configure script).
2945     Released to testers.
2946    
2947    checkpoint11
2948     Re-arranged initialise() and introduced ini_vertical_grid()
2949     and ini_masks_etc().
2950    
2951  checkpoint10  checkpoint10
2952   Introduced the configure script.   Introduced the configure script.
2953   Separated out the diags package.   Separated out the diags package.

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