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revision 1.14 by cnh, Tue Sep 29 18:57:53 1998 UTC revision 1.673 by mlosch, Fri Jun 9 00:20:30 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/ggl90: fix sloppy output and fix a bug
8    o pkg/seaice: added SEAICEuseEVPpickup parameter
9      - Set to false in order to start EVP solver with
10        non-EVP pickup files when using SEAICEuseEVP
11      - fix sign error in diffusion in seaice_calc_rhs
12    
13    checkpoint58h_post
14    * Modifications for bottom topography control
15      o replace hFacC by _hFacC at various places
16      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
17      o add non-self-adjoint cg2d_nsa
18      o update autodiff support routines
19      o re-initialise hfac after ctrl_depth_ini
20      o works for 5x5 box, doesnt work for global_ocean.90x40x15
21    * Adding verification for 5x5 box (4-layer) bottom topography control
22    
23    checkpoint58g_post
24    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
25       used for mean seasonal cycle, mean diurnal cycle); add an example
26       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
27    o pkg/ggl90:
28      - add parameter (minimum surface kinetic energy)
29      - fix bug (avoiding division by zero)
30    o couple pkg/thsice to pkg/seaice:
31      - modify advection in seaice to accomodate new scalar fields to be advected
32      - only muliDimAdection scheme work with seaice/thsice
33      - mapping of thsice-variables to seaice-variables, back and forth
34      - does not break the verification experiments, but does not give the
35        desired results either
36    o pkg/seaice
37      - make (default) second order advection a bit less confusing?
38    
39    checkpoint58f_post
40    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
41      to pkg/seaice):
42      - new routines thsice_map_exf and thsice_get_exf provide the interface
43      - add an additional formal parameter to thsice_solve4temp
44    o pkg/exf:
45      - add new fields wspeed, snowprecip (to be able to couple to thsice)
46      - correct Stefan-Boltzmann constant
47      - new parameter for longwave surface emittance
48      - separate some stuff from exf_bulkformulae into new routines  
49        exf_radiation, exf_wind
50      - add new parameters and constants: longwave emissivity for ocean, ice
51        and snow, evaporation parameters over ice
52      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
53        either wind from stress or stress from wind
54    o pkg/thSIce:
55    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
56    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
57       and THSICE_CALC_THICKN
58    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
59    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
60      to make debugging easier.
61    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
62    o pkg/bulk_force:
63      - clean-up comments and parameters ;
64      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
65    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
66      generate new output for test-experiment: aim.5l_cs.thSI
67    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
68      testreport accordingly
69    
70    checkpoint58e_post
71    o SEAICE_CGRID adjoint done
72    o R_STAR adjoint implemented.
73      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
74      * need to sort out init. of h0facc, etc.
75    o Make pkg/profile fully independent of ecco,cost, etc. stuff
76      to be able to use it in pure forward.
77    
78    checkpoint58d_post
79    o upgrade simple test-experiment to tutorial example:
80     step.1: duplicate the experiment and (step.2) will remove the old copy.
81      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
82      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
83      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
84      tutorial_global_oce_biogeo    <- copy of dic_example
85      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
86      tutorial_plume_on_slope       <- copy of plume_on_slope
87      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
88      tutorial_global_oce_optim     <- empty for now (David ?)
89      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
90     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
91    o correct a sign problem in cost_scat.F
92    o obcs and ptracers: fix boundary conditions for advections schemes
93      with larger stencil
94    o thsice adjoint: start
95    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
96      completeness
97    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
98      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
99    o ptracers adjoint:
100      * avoid extensive recomputatations
101      * fix missing re-init. of gptr (missed by TAF)
102    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
103      me to turn off the excessive output to STDOUT that this package produces
104    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
105      and add those terms in Vector-Invariant formulation.
106    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
107      if the control period (xx_hfluxperiod etc) is 0
108    o in profiles pkg, clean routines and fix details
109    o in ecco pkg, reading ssh data:
110      fix problem in case the model does not start at iter0=0
111    o fix mnc-pickup/restart for ptracers
112    o new package prifiles:
113      code to compute profile-based cost by Gael Forget
114      (modifs in ecco, ctrl, autodiff)
115    o Benign bug fix in initialization (spotted by M. Mazloff) of
116      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
117    
118    checkpoint58c_post
119    o adjoint: finish NLFS adjoint and provide reference output in
120      verification/global_ocean.90x40x15/results_ad_nlfs
121    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
122      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
123      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
124      with SEAICE_CGRID defined.
125    o move calendarDumps from "data" to "data.cal" and clean-up the code
126      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
127    o add useEXF & useCAL flags (for now, set in hard-coded way)
128    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
129      (were missing in NH mode, and wrong in quasihydrostatic mode).
130      waiting for Chris updated version of calc_gw to add those CALLs.
131    o fix bug in quasihydrostatic S/R ;
132      add a test for this option: global_ocean.90x40x15.qshyd
133    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
134      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
135    o add on/off flag useOffLine for package OFFLINE
136    o seaice:
137      - modify advection so that it works also on the C-grid
138      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
139        problem in multi-tile runs with C-grid
140      - add flags for clipping ice velocities and/or masking solver forcing
141      - fix drag (ocean on ice) formulation and a bug that caused noise in the
142        C-grid solver
143      - added a few comments to seaice_diffusion.F
144      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
145        are now exclusive)
146      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
147        required re-ordering the code a little:
148       + make DAIRN global variable (defined in SEAICE)
149       + move computation of the viscosities eta and zeta into a new separate
150         routine (because I need to recompute them in seaice_ocean_stress.F)
151    
152    checkpoint58b_post
153    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
154      update output.txt of exp. aim.5l_cs.thSI
155    o various mnc cleanups and improvements:
156      + shrink lookup tables by factor of ~4
157      + better error reporting when running out of lookup space
158      + able to handle longer path/file names (up to 500 chars)
159    o adjoint:
160      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
161      - TBD: "hidden" mom_vecinv recomp. in dynamics
162    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
163     (allow to differentiate between forcing components using new integer flags:
164      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
165     and add new flag to put Dissipation tendency out of Adams-Bashforth.
166    o ecco
167      - enable trend removal from SSH anomaly obs.
168    o adjoint
169      - a fix for PmEpR when #undef EXACT_CONSERV
170      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
171      - try to fix "hidden" recomp. in forward_step for NLFS
172        (NLFS seems broken sometimes after I checked it in)
173    o seaice:
174     - add c-grid version of the dynamic solver:
175       + three new routines that are the c-grid substitute lsr, dynsolver
176         and ostres
177       + put a few fields that were local to dynsolver into global common
178         blocks, so that I can move the computation of stresses etc into
179         seaice_lsr (saves coding but may break the adjoint).
180     - replace more hardwired parameters by runtime parameters
181     - add ice masks that mask the rhs of the implicit solvers where there
182       is no ice (commented out in seaice_dynsolver, because i am not sure
183       if this works properly), eventually this should replace the clipping
184       of ice velocities in seaice_dynsolver to +/-40cm/s.
185    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
186      include it only where its needed
187    o move balancing of fluxes before the call of external_forcing_surf
188    o seaice:
189      - correct units of turning angles (now they are really in degrees)
190      - move computation of GWATX/Y out of main routine into dynsolver
191      - initialize GWATX/Y in seaice_init
192    o Apply mask on Fresh-Water flux (needed for SSH forcing).
193      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
194    o seaice: add runtime flags for turning angles (default to zero)
195    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
196      and trend from exf forcing and ctrl control adjustments
197    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
198      (since checkpoint57x_post)
199    o change the default rotation period to 86164.s = the Earth rotation
200    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
201      and based on a reference stratification. Tested within hs94.cs-32x32x5.
202    o seaice advection: add code for choosing between the default (2nd order
203      central differences) and multiDim advection schemes provided by
204      pkg/generic_advdiff
205    o seaice:
206      - removed all references to SEAICE_GRID.h fields from
207        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
208        (cubed-sphere configuration will change a little)
209      - grid computations in seaice_init are obsolete now.
210      - cleaned up code a little so that is easier to read (hopefully).
211      - added new (better?) discretizations of default advection and diffusion
212        (turn on with SEAICEuseFluxForm)
213      - replace 1 in 3d global fields by kSurface in growth.F
214      
215    checkpoint58a_post
216    o seaice:
217      - bug fix in advect.F
218    o shelfice:
219      - separate shelfice load anomaly from pload (breaks with time
220        dependent forcing), => introduce constant field shelficeLoadAnomaly.
221        Its default is 0., but it may be computed more cleverly from (unknown)
222        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
223        done offline. A good approximation of the pressure load anomaly is
224        necessary to avoid large initial adjustment processes underneath
225        deep-reaching shelfice.
226      - small fix in ISOMIP shelfice_thermodynamics
227      - add more sophisticated thermodynamics of Hellmer (1989), this is
228        now the default
229      - give a few constants more intuitive names
230    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
231      if bulk formulae are used in long integration (especially EmPmR). Turn
232      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
233      if balancePrintMean, the imbalance that is substracted is printed to
234      STDOUT.
235    o fix bug (typo) in obcs_apply_eta.F
236    o add a new package shelfice which enables us to model the circulation
237      underneath shelf-ice with draughts of hundreds of meters.
238     - works
239     - to do: + include improved thermodynamics
240              + check whether kSurfC (from model/inc/SURFACE.h) can be used
241                instead of new field kTopC
242              + can we use topoFile, Ro_surf and existing code in ini_depth.F
243                instead of new field R_shelfIce and new code in ini_depth.F
244                and ini_mask_etc.F?
245              + adjust vertical mixing schemes?
246    o seaice pkg:
247     - add a cpp-flag to include a simple formula for a salinity dependent
248       freezing point of sea water at the surface
249     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
250       meridional stresses are now different (and hopefully correct)
251    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
252       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
253       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
254    o pkg/diagnostics: add options and parameters for regional-statistics
255       diagnostics ; define regions by reading a region-mask from a file
256       (might add other options later)
257    o pkg/bulk_force:
258     - add option and parameters to use AIM surface-flux formulae.
259     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
260       others forcing fields (defined in PARM05, parameter file "data") are loaded
261       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
262     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
263     - use the right EXCH call for uwind,vwind (to work on CS-grid).
264     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
265       and parameters (note: calcWindStress replaces .NOT.readwindstress).
266     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
267    
268    checkpoint58
269    o add "--embed-source" option to genmake2 which, when the supporting
270      tools can be compiled (as determined by genmake2) will turn on the
271      embed_files package which then embeds the entire MITgcm source code
272      (*.[fFhc] + Makefile) used for the build within the executable
273      - requested by CNH but off by default
274      - adds a paltry <9MB to the mitgcmuv executable in most cases
275      - only writes the output when useEMBEDSRC in eedata is true
276    o clean up 3-dim. relaxation codes:
277      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
278      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
279      * Thanks to Tom Haine for testing!
280    
281    checkpoint57z_post
282    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
283      affects output (@ truncation level) of exp. plume_on_slope ; updated.
284    o fix the pickup behavior for obcs in combination with ptracers
285    o fix a bug in ptracers_external_fields_load
286    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
287      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
288    o transfered surface NH pressure to eta field (if exactConserv).
289    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
290         and update lab_sea output.txt file.
291    o completing 3-dim. relaxation code: additional term
292         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
293      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
294      * At compile time, in "EXF_OPTIONS.h" set
295          #define  ALLOW_CLIMTEMP_RELAXATION
296          #define  ALLOW_CLIMSALT_RELAXATION
297      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
298          tauThetaClimRelax3Dim = 15552000.0,
299          tauSaltClimRelax3Dim  = 15552000.0,
300      * 3 cases:
301          1) Use a constant-in-time 3-dim. field
302          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
303          3) Real-time relax. to time-evolving prescribed field
304    o Adding Laplacian-type smoothness constraint on
305      initial and boundary (forcing) controls (ic, bc)
306      * enable at compile-time via
307        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
308      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
309      * Absolute scale somewhat unclear so far
310      * no area weighting was included since no other cost term does so far
311    
312    checkpoint57y_post
313    First step for a NLFS adjoint
314    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
315    o new init. routines for calc_r_star, calc_surf_dr
316    o still need to deal with ini_masks_etc
317    o testreport seemed happy
318    checkpoint57y_pre
319    
320    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
321    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
322    o add new offset feature to offline pkg (plus minor cleanup)
323    o cfc fixes for final year of integration
324    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
325      be in GCHEM_OPTIONS).
326    
327    checkpoint57x_post
328    o fix testreport Pb in multiple test experiment.
329    o cleanup our namelist syntax in verification:
330      - make it more F95 standards compliant (some work still needed)
331      - allows the vast majority of our tests to work with gfortran
332    o Non-Hydrostatic:
333     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
334     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
335    o Allow to apply AB on T,S rather than on AB(gT,gS):
336     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
337     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
338       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
339     - need a "clever" read_pickup to restart from the other AB formulation
340    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
341    o remove some unused variables (reduces number of compiler warnings)
342    o adjoint
343      * Disable useVariableViscosity for adjoint for time being
344        (there are a number of extensive recomputations)
345      * Initialize certain variables needed for adjoint
346    
347    checkpoint57w_post
348    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
349                 fix the singleCpuIO RS version of MDSWRITEFIELD
350       and add a WARNING if using globalFiles=T with multi-processors.
351    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
352      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
353    o tracer advection scheme:
354      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
355       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
356       was not very convenient).
357      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
358       (further tests needed for the implicit DST & Flux-Limiter schemes).
359    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
360      and sRef for convenience, handy, when you want to initialize
361      ptracers in a large domain with a constant non-zero value. Also,
362      untangle ptracers_init.F a little.
363    
364    checkpoint57v_post
365    o change dome exp. to use variable viscosity in side-drag terms.
366    o remove all the files from the cfc_offline test since they are now
367      incorporated into tutorial_cfc_offline which has been producing
368      identical results for a few days of testing
369    o add new parameter: sideDragFactor to enable half-slip-side BC
370      and change side-drag S/R to use viscosity from mom_calc_visc
371      (can switch back by setting sideDragFactor=0.); affects results at
372      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
373       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
374    o vorticity & strain are now computed without masking, to account for
375      no-slip-side BC in variable viscosity calculation ; mask is applied
376      anyway later on, before computing advection/coriolis terms.
377    o modify exp4 to test new obcs support for reading from external files
378      and for passive tracers
379    o fix behavior of ptracers_monitor when monitor output is written to a
380      netcdf-file; still not independent of monitor.F (writes in the same
381      file).
382    o change default value of tRef (put a uniform, meaningful value for ocean
383      & atmos) and initialize sRef (was missing, as Martin mentioned).
384    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
385      to be proportional to enstrophy dissipation length.  Thus,
386       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
387      This is now consistent with Smagorinsky and with the manual.
388    
389    checkpoint57u_post
390    o OBCS and PTRACERS: add open boundary support for passive tracers
391      - either use homogenous (pseudo) v.Neumann conditions or prescribe
392        OB-values from file; this is not different from the way theta and salinity
393        are treated
394      - however, Orlanski-radiation conditions are not supported, and the model
395        will stop if you use pTracers and Orlanski at the same time.
396      - beefed up the rountine obcs_external_fields_load: now only those open
397        boundary values are overwritten with values from files for which there
398        are really files, otherwise the OB-fields remain untouched. This makes
399        it possible to use different OBs at different ends of the domain (as
400        with EXF)
401    o reduce number of exch calls in shap_filt (s2).
402    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
403      truncation level) 4/5 MLAdjust test results (11&12 digits match).
404    
405    checkpoint57t_post
406    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
407    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
408      same truncation, independent of the face number: affects affects several
409      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
410    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
411      note that biharmonic viscosity + no-slip was not tested in any experiment.
412    o fix bug in non-linear free-surf side-drag ; generate new output for
413      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
414    o make mnc honor the writeBinaryPrec flag for most kinds of output
415    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
416    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
417      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
418    o add brackets in multi-terms sum to get same truncation, independent of
419      the face number (manage to get exactly same value of gU,gV at the cs-edge)
420      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
421    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
422      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
423      a maximum grid-scale Reynolds number.  Also, changes all length calculations
424      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
425      Suggested values of viscosity parameters found in mom_calc_visc.
426      Many new viscosity diagnostics available.
427    
428    checkpoint57s_post
429    o Add clearing-house for viscosity calculations, mom_calc_visc and
430      correct numerous bugs in LeithD and Smagorinsky discretizations.  
431      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
432      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
433      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
434      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
435      The Strain-Tension form is now called with useStrainTensonVisc=.true.
436      ViscAhStrain and viscAhTension are now retired.
437    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
438    o In response to JMC's bug report, genmake2 now ignores any soft-links
439      that it finds in the *current* directory when searching for files.
440      Soft-links found in any other source directories will still work as
441      they did before.
442    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
443      a C routine to unlimit the stack size
444    o mnc-ify pkg/aim snapshot vars
445    o mnc-ify pkg/land as requested by Daniel
446    o various changes to mnc including:
447      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
448      - output can now be grouped so that all files within a group
449          change the ITER portion of their names in lock-step together
450      - can now read ("global") PER-FACE (in addition to PER-TILE) files
451          and works with both EXCH1 and EXCH2 (but needs more testing)
452      - writing works for all verification test cases w/ g77 on Linux
453    
454    checkpoint57r_post
455    o make MNC variable initialization happen earlier
456    o add diagnostics for (almost) each term of the momentum Eq.
457    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
458    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
459    o remove MINIMAL_TAVE_OUTPUT option ;
460      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
461    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
462      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
463    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
464    o add time-dependent SST, SSS control
465    o cost terms in ecco/ modularized (new cost_generic.F)
466    o cost_averages routines are modularized (new cost_averagesgeneric.F)
467    o new infrastructure for seaice model vs. obs misfits in seaice/
468      * driver from the_main_loop.F is seaice_cost_driver.F
469      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
470      * gradient check in Exp. 6a of natl_box_adjoint/
471    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
472      (see README file)
473    
474    checkpoint57q_post
475    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
476    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
477      - bug was reported by Jean-Michel and Ian Fenty
478    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
479      update exp. cpl_aim+ocn output.
480    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
481      Needed for high-res. runs with large global files
482      to be able to limit tapelev size
483    o Changed some tests for adjoint:
484      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
485      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
486      * global_ocean.90x40x15/ back to default 3-level checkpointing
487    o Modifications to enable scripted COMMON to MODULE conversion
488      * verification/OpenAD/code/ has necessary scripts and description;
489      * converts, compiles and runs successfully;
490    
491    checkpoint57p_post
492    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
493    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
494      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
495    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
496    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
497      (was already the case for dissipation with mom_vecinv,
498       and also the case for grad.PhiHyd when staggered-timeStep)
499      This will allow to put dissipation out-off the AB time-stepping.
500     Unfortunately, affects truncation error. Update output of exp. that "fails"
501      (cg2d matching number) and leave the others for later: front_relax(10),
502      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
503      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
504    
505    checkpoint57o_post
506    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
507      (2) its ready to be documented during the 20050801 DocFest
508    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
509      for ideal_2D_oce and lab_sea on linux_ia32_g77
510    o set to #undef CTRL_SET_OLD_MAXCVARS_30
511      in global1x1_tot/code_seaice_adj to access indices 32, 33
512      (worth another tag)
513    
514    checkpoint57n_post
515    o adding precip control xx_precip 32
516    o adding swflux control xx_swflux 33
517    o Replacing 10 forcing penalty cost routines by 1 generic.
518    o Implementing partitioning in time-mean and variable adjustment
519      for atmos. state.
520    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
521    o in natl_box_adjoint:
522      * updated exp 1 to 10
523        (but does not have time-mean vs. variable split results yet)
524    o updated global1x1/*_seaice_adj/
525      to incorporate latest changes
526    o enable useSingleCpuIO for mdsio vector routines
527      (applies in particular to tapelev I/O)
528    o removed inefficient K-loop in all active_file*control*.F
529    
530    checkpoint57m_post
531    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
532      and advect_cs (use EXCH-2 and standard cs-32 grid files).
533    o pkg/exch2: filling of face-corner halo regions is optional
534      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
535    
536    checkpoint57l_post
537     tag before updating tutorials (pre-release-2)
538    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
539       for output and interpolation of input fields onto model grid)
540    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
541       Affects results of exp. rotating_tank ; update output.txt.
542    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
543          and taking the square quantity and/or using a fraction-weight field.
544    o fix aim_diagnostics_init.F mate numbers.
545    o add mnc output capability to diagnostics/diagstat and update
546      our cvsignore files for the ACSII output generated
547    
548    checkpoint57k_post
549    o lab_sea now uses diagnostics package and provides a suite of
550      new EXF diagnostics output.
551    
552    checkpoint57j_post
553    o exf
554      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
555        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
556        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
557      * extended diagnostics output
558        - now includes all EXF variables
559        - hs, hl moved to common block
560        - separate S/R for diagnostics, called after ctrl vector is added
561        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
562        - EXFqnet contains true Qnet (i.e. includes qsw)
563      * updated verif. lab_sea, global_with_exf
564      * Rearranging hflux (exf_mapfields -> exf_getforcing)
565        to ensure that diagnostics sees a true EXFqnet
566    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
567    o diagnostics pkg: change pointers so that 1 diagnostic can be used
568      several times with different frequencies.
569    o mnc-ify the thsice package as requested by Daniel Enderton
570      - the monitor--MNC output needs work
571      - many attributes need to be added (most are currently blank)
572    o mnc-ify theaim_v23 package as requested by Daniel Enderton
573      - many attributes need to be added (most are currently blank)
574    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
575    o add Sadourny like discretization to the 4th.O vorticity advection scheme
576    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
577      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
578         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
579    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
580     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
581    
582    checkpoint57i_post
583    o Diagnostics package was changed: diagnostic allocation is now deactivated
584      by setting an empty file name in the namelist (used to be by setting 0 frequency)
585    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
586      add 1rst Order upwind vertical Shear.
587    o add a quick fix for A/B checkpointing in OFFLINE mode
588    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
589      end-run around the C/Fortran linking horror in eesup/src/timers.F
590    o added pkg/runclock: allows user to terminate run based on wall clock
591    o added non-hydrostatic scaling parameter: nh_am2
592    o pkg/my82: futile attempt to make results compiler-independent by adding
593      some "_d 0", etc. no effect.
594    o for mnc output, fill the 'T' coordinate var with myTime and create a
595      separate 'iter' variable for iteration count
596    o pkg/diagnostics:
597      add new capability: output of Global/Regional & per-level statistics ;
598      tested against monitor output (including land & thSIce) on various exp.
599    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
600    
601    checkpoint57h_done
602      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
603      data.diagnostics, data.gchem, data.ptracers) is done.
604    
605    o pkg/diagnostics: prepare for Global/Regional statistics.
606      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
607    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
608      and rename it: DIFFERENT_MULTIPLE
609    
610    checkpoint57h_post
611    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
612    o pkg/diagnostics: change output frequency, now in seconds (instead
613      of Nb of iterations). This requires to change data.diagnostics.
614    checkpoint57h_pre
615    
616    o in mnc, let the user create the output dir if both mnc_outdir_date
617      and mnc_outdir_num are false
618    o add fflags() to pkg/diagnostics which allows one to specify, on a
619      per-file basis, the file precision [default behavior is unchanged]
620    o added diagnostics to pkg/kpp, including computation of mixed layer
621      depth based on a temperature/density criterion
622    o updated verification/natl_box to test the new pkg/kpp diagnostics
623    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
624    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
625    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
626      not mnc -- this mistake was found by JMC and is now corrected
627    
628    checkpoint57g_post
629    o add Adams-Bashforth 3rd Order time stepping:
630      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
631      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
632    checkpoint57g_pre
633    
634    o make lambda[Theta,Salt]ClimRelax spatially varying
635      (default remains spatially uniform constant based on tau)
636    o added new control variables
637      * init. uVel, vVel, etanN
638      * lambda[Theta,Salt]ClimRelax
639    o separate masks used for ctrl_pack/unpack 'from write_grid' output
640      (suggested by G. Forget)
641    
642    checkpoint57f_post
643    o add parameter "baseTime" = model base time = time at iteration zero
644      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
645      account for baseTime shift
646    o move Coriolis arrays from PARAMS.h to GRID.h
647    checkpoint57f_pre
648    
649    o mnc-ifying the seaice package
650    o introduced an alternative length scale calculation for use in the limiting
651      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
652    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
653    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
654      as well as grad(vort3).  Made it compatible with both approximate form
655      for the cubed sphere and full form of these gradients.  Added flag
656      useFullLeith to select between approximate and full form.  
657    o add "d0" in getcon.F to reduce differences between compilers/platforms
658      update output.txt of exp. fizhi-gridalt-hs
659    o change port_rand funtion to allow to set the seed.
660    o fix obscure MNC bug involving conversion between reals and integers
661      - it caused no problems with certain (eg. gcc, ifc) compilers but the
662        new version is now more standards-compliant
663    o adjoint-related modifications
664      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
665      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
666      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
667    
668    checkpoint57e_post
669    o Adding eddy stress controls a la Ferreira et al.
670    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
671    
672    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
673      update output.txt of exp. fizhi-gridalt-hs
674    o add more "Z" dimensions and associated coordinate vars to MNC
675    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
676    o parameter calendarDumps: when set, approximate months (30-31 days) and years
677      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
678      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
679      months and years.  Requires pkg/cal.
680    o diagnostics: add pickup functionality
681      - off by default for backwards compatibility
682      - current version only uses MDSIO -- MNC will be added
683    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
684    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
685    
686    checkpoint57d_post
687    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
688    o modify verification/ideal_2D_oce so that it tests the creation of mnc
689      output from the diagnostics package
690    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
691    o make genmake2 more portable by using ".$FS" instead of ".f" for more
692      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
693    o add coordinate variables to the MNC output from the diagnostics package
694    o change MNC-flags default value: true when useMNC=TRUE
695    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
696      the ability (off by default) to read the grid information using MNC
697    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
698    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
699    o do snap-shot diagnostics at the middle of the time-interval (instead of
700      at the end).
701    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
702      new test for AIM with thSIce + slab-ocean
703    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
704    o move state variable diagnostics to the beginning of the time step ;
705      (note: still needs some work specially for snap-shot diagnostics)
706      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
707    
708    checkpoint57c_post
709    o Change testing option (-ieee) to get closer agreement between g77 & ifort
710    o generate new output.txt files on faulks with g77 & the new -ieee option
711    checkpoint57c_pre
712    
713    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
714      update output.txt of exp. global_ocean.90x40x15
715    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
716      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
717    o add saltFlux(+File) forcing capability with periodicExternalForcing
718    o allow to use pkg diagnostics for GM-Redi & ThSIce output
719    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
720    o improvements for the MNC output from DIAGNOSTICS:
721      - correct handling of the unlimitied dimension
722      - all dims now have associated coordinate variables
723      - variables located at U, V, and Corner ("Z") points are now written
724        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
725        *all* data points are output
726    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
727    o added pkg/seaice/seaice_monitor.F
728    o mdsio_readfield.F can now read files visible only to master MPI process.
729    o pkg/seaice: some test code for ice-modified ocean stress
730    o exf_getffields interpolation defaults to bilinear for all scalar forcing
731      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
732      spurious negative numbers for precipitation and humidity.  Will cause
733      some small numerical differences for integrations using pkg/exf/exf_interp.F.
734    o pkg/ctrl/
735      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
736        May be enabled via doPackDiag
737      *  introduce z-scaling of
738         + gradient (doZscalePack) and
739         + control (doZscaleUnpack)
740    o pkg/mdsio/
741      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
742      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
743    
744    checkpoint57b_post
745    o simplify options in diagnostics_fill arguments (remove weird combinations)
746    o fix MNC coordinate variables so that they now contain per-face index
747      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
748      general, EXCH2 grids are only aligned to a "local" coordinate system
749    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
750    o Implement instantaneous output within pkg diagnostics:
751      setting a negative frequency in data.diagnostics produces
752     "snap-shot" output (as opposed to time-average if freq > 0)
753    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
754      NOTE: change ptracer diagnostics name: use 2 characters to work with
755            more than 9 tracers. Add also diagnostics of advect & diffus flux.
756    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
757      becomes the coordinate variable for the 'T' dimension
758    o add CF-style coordinate variables to MNC
759      - just a first cut:  numbers are meaningless on the cubesphere and
760        missing along the T axis but otherwise it works!
761    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
762    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
763    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
764      this is based directly on what the model compute, so that the content of
765      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
766    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
767    o clean up build options files for SunOS, in particular
768      - remove -traditional from xmakedepend
769      - change -xarch=v9 to -xarch=native for f77
770      - restore use of make (not gmake)
771      - add CC=gcc if using g77
772    o changes per discussion of AM, JMC, & EH3 today:
773      - move redundant "grid" variables out of "state" -- in preparation of
774        creating proper CF-style coordinate variables and in recognition
775        that any/all grid variables can be easily copied (eg. w/NCO) from
776        the grid files into any of the other NetCDF files
777      - *always* output grid variables with MDSIO (this will eventually be
778        changed)
779      - output MNC grid file if useMNC is true
780    o every instance of _END_MASTER() has been found and replaced with
781      _END_MASTER( myThid ) in order to satisfy certain picky Sun
782      preprocessors
783    o re-arrange diagnostics pkg initialisation:
784     - allow each package to extend the available diagnostics list
785     - add some checking and fix small problems (multi-threaded, ...)
786     - new S/R diagnostics_fill (replace fill_diagnostics):
787       look through the short list of active diag. (instead of the long list)
788       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
789    
790    checkpoint57a_post
791    o this set of changes restores TAMC compatibility
792      tested for global_ocean.90x40x15 adjoint on trough
793      (what a pain)
794    
795    checkpoint57a_pre
796    o some modifs in tools/build_options for sunos
797    o call ctrl_pack for ctrl at end for optimcycle=0
798    
799    checkpoint57
800    o add horizontal bi-harmonic viscosity for vertical velocity
801      - new parameter viscA4W (defaults to viscA4)
802      - affects only non-hydrostatic code
803      - to be done: no-slip lateral boundary conditions
804    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
805    o implement Implicit Vertical advection for pTracers
806    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
807      (implemented also for implicit vertical diffusion & advection)
808    o OBCS: extend application of tracer open boundary conditions
809      to a strip beyond the boundary of width Olx/Oly
810    o add call monitor to TAF set of required calls (flow directives)
811      and include in natl_box_adjoint
812    o untangle a few ifdefs related to cost, ctrl, autodiff
813      untangel a few ALLOW_ECCO_OPTIMIZATION
814    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
815      (theta2, salt2 in ecco_cost_weights)
816    
817    checkpoint56c_post
818    o OBCS as control variables
819      - update ctrl_ad_diff.list, obcs_ad_diff.list
820      - remove balance of obcs controls from default
821      - fix index bug nobcs in ctrl_init
822      - fix dummy fields filen in ctrl_pack
823      - add dummy weights for obcs
824    o lsopt: comment out fort.94 output
825    o optim:
826      - remove unnecessary header files
827      - adjusted namelists
828      - add xerbla.F to Makefile
829    o exf:
830      - multiple modifications of exf_check_range
831      - unit change in exf_init_runoff from [m/year] to [m/s]
832    o mdsio:
833      - i/o-vector change debugLevel from debLevA to debLevB
834    
835    checkpoint56b_post
836    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
837      is called from DO_THE_MODEL_IO
838      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
839      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
840      - clean up PTRACERS_WRITE_TIMEAVE a little
841    o add another verification experiment that tests both the cfc-pkg and
842      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
843      reactive tendencies treated inline with regular timestepping
844    o testreport previously did a lousy job of comparing small numbers, so
845      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
846      implemented in the little c-progam tmp_cmpnum.c which is embedded in
847      testreport.
848    o ptracers_monitor: bug fix for MPI
849    
850    checkpoint56a_post
851    o GCHEM: finish reorganizating the package
852      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
853        (introduces another 3D-array for each passive tracer, but only if
854        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
855        gchemTendency is not needed because the timestep is done separately)
856      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
857      - GCHEM is now---more or less cleanly---separate from PTRACERS
858      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
859        so clear to me how that should be done in a general way.
860    o CFC: improve formatting of output in CFC_ATMOS
861    o PTRACERS:
862      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
863        that ALL experiments with ptracers enable can be checked. This makes
864        GCHEM_MONITOR obsolete.
865      - include a runtime parameter PTRACERS_monitorFreq that defaults to
866        monitorFreq
867      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
868    o add PTRACERS (PTR0[1-5]) to testreport output
869    o exf_check_range:
870      * default changed to .TRUE.
871      * will check values for niter0 if debLevA, every timestep if debLevB
872      * STOP in exf_check_range if 'out of range'
873      * range chosen generous to allow for potential extema
874      TBD: a version with stricter range
875           permitted range would be runtime parameters
876    o GMredi:
877      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
878      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
879      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
880    o GCHEM:
881      - move call to GCHEM_FORCING_SEP, so that it is now called before
882        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
883      - introduced a useGCHEM runtime flag and applied it everywhere.
884      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
885        this flag is now only visible within GCHEM-pkg routines.
886      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
887        be replaced by a 3D array that is computed before thermodynamics; for
888        this, the tracer ID iTracer had to be included into the parameter list
889        of ptracers_forcing
890      - set up forward_step to call gchem_forcing, that will replace
891        gchem_forcing_int in ptracers_forcing
892      - cleaning up
893    o small cleaning of exch2: remove files that are also in eesupp/src
894    
895    checkpoint56
896    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
897    o mnc: cleanup "full" files--fixes out-of-memory problem
898    o ECCO-GODAE
899      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
900      * fully merged and updated from SIO code
901        windstress sign change affects
902        - exf_inscal_[u/v]stress
903        - sign of xx_tau[u/v] adjustments
904        - signs in cost_scat
905      * ctrl_get_gen: avoid update of tau[u/v] for first few days
906      * natl_box_adjoint updated and compressed
907      * 2-level checkpoint switch added
908        (tested in EXP. 1 of natl_box_adjoint)
909      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
910    o SVD
911      * first complete, non-hacked version for SVD calculations
912      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
913        performed via direct access files admtlm_vector.it????
914        (via ctrl_[un]pack)
915      * optimcycle is used for ARPACK iteration counter
916        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
917      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
918        and add linear transforms where necessary
919      * controls are initial/final SST, SSS (can be extended; need to check
920        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
921    o mdsio: filename info to both stderr, stdout
922    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
923      from sign change
924    
925    checkpoint55j_post
926    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
927      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
928    o add consistent build directories and .cvsignore files to verification
929    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
930    o make all subroutines 30 or less characters in length for certain older
931      compilers to work (a thorough search only turns up two routines in
932      pkg/ptracers)
933    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
934      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
935    
936    checkpoint55i_post
937    o change arrays for total vertical diffusivity (2.D if explicit,
938      3.D if implicit) ; each ptracer uses its own background value.
939    o added mnc/NetCDF output capability to ocn_compon_interf
940      - added bits to verification/cpl_aim+ocn so that it can run on
941        ITRDA and other clusters without the mpirun "-wd" option
942    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
943      configuration
944    o give MNC the ability to create additional files rather than
945      exceeding a specified file size limit "MNC_MAX_FILESIZE"
946      - the default is just less than 2GB which is a practical limit
947        on many systems
948    o Compute the non-local term using either KPP vertical diffusivity (=default)
949       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
950    
951    checkpoint55h_post
952    o add verification test "vermix"
953    o remove all the *_ioinc flags and replace with the single global
954      outputTypesInclusive flag
955    o allow to set a vertical profile of vertical diffusivity for T & S
956    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
957    o useMNC moved from data.mnc to data.pkg
958    
959    checkpoint55g_post
960    o Renaming carbon AD experiments to comply with testreport conventions
961    o Updating adjoint of Held-Suarez hs94.1x64x5
962    o Fixing directives for non-ECCO forward_step, after ECCO directives
963      have been fixed to avoid recomp. of do_oceanic_phys
964      Works well for global_ocean.90x40x15,
965      but recomp. issue remains for carbon
966    o Updating adjoint output for natl_box_adjoint after
967      pkg/ecco has been modified (see taga c55d_post)
968    
969    checkpoint55f_post
970    o rename to timeave_init_fixed
971    
972    checkpoint55e_post
973    o some delicate re-shuffle of store directives to avoid one
974      extra call of do_oceanic_physics
975      affects ecco_the_main_loop.F, do_oceanic_physics.F
976      checkpoint_lev1_directives.h
977    o NB: this may break global_ocean adjoint temporarily,
978      but it is clear how to fix it. Will do later, need this now.
979    
980    checkpoint55d_post
981    o ECCO specific cost function terms (up-to-date with 1x1 runs)
982    o ecco_cost_weights is modified to 1x1 runs
983    o modifs to allow observations to be read in as
984      single file or yearly files
985    o enable to read exf forcing fields as either
986      single file or yearly files (flag useExfYearlyFields)
987    checkpoint55d_pre
988    
989    o switch between 2-level and 3-level checkpointing
990    o add ability of MNC to write local and "partial" (eg. 2D slices where
991      the full 3D field is never actually stored) arrays to NetCDF files
992      with the correct (that is, the complete multi-dimensional) set of
993      array indicies
994      - used in mom_vecinv() to write the diagFreq output
995      - tested (demonstrated) in verification/aim.5l_cs
996    o further mnc-ification
997      - add verification/lab_sea to the list with mnc setups
998      - fix undefined mnc v-names in cd_code
999      - add kpp to mnc output (both snapshot and timeave)
1000    o non-hydrostatic code
1001      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1002        in calc_gw.F
1003      - defaults to viscAh
1004      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1005        friction or Leith) in non-hydrostatic mode, as long as there is
1006        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1007    o pkg/cost
1008      extend simple cost functions to treat time mean quantities
1009      (T,U,V) via cost_accumulate_state from cost_tile
1010    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1011        be 2 times larger than the minimum size the advection scheme requires.
1012        now get a perfect conservation of salt in advect_cs test-exp (updated)
1013    o GGL90 (Gaspar's TKE mixed layer)
1014      - add horizontal diffusion of TKE, requires exchanges in
1015        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1016        default. In OPA there is no horizontal diffusion of TKE but the
1017        mixing coefficients are computed from a horizontal average of TKE of
1018        6 points or so. I think that diffusion has a little more physical
1019        justification.
1020      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1021        was in vain)
1022      - mask tke-variable in ggl90_init
1023    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1024    o fix biharmonic diffusion on CS-grid.
1025    o more obcs stuff
1026      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1027        for reading boundary values. This routine is called from
1028        obcs_prescribe_read
1029      - updated obcs_check
1030      - changed sponge layer relaxation parameter units for days to seconds
1031      - turned off sponge layer by default
1032      - changed argument list of OBCS_CALC to myTime+deltaTclock
1033      - fixed about 35 bugs in obcs_external_fields_load
1034    
1035    checkpoint55c_post
1036    o obcs stuff
1037      - new runtime flags useOBCSprescribe, useOBCSbalance
1038      - re-arranged obcs_calc
1039      - moved exf_getobcs to obcs_prescibe_read
1040        obcs_prescibe_read is called after ORLANSKI stuff
1041        and independent of it (executable can contain all).
1042      - updated obcs_check
1043      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1044        These may be necessary only if tangential velocities are
1045        prescribed at OB, not sure, needs testing.
1046    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1047      which simplifies the calls and passes the ifc check-bounds test
1048    
1049    checkpoint55b_post
1050    o add a 2D scalar, Z location, exchange_2 routine.
1051    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1052      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1053      affects advect_cs results (for the wrong reason): update output.txt
1054    o use a more standard discretization for biharmonic viscosity ;
1055     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1056      affects results of dome set-up: update output.txt
1057    o fix gad_advection.F (CubedSphere part), back to version 1.23
1058    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1059    
1060    checkpoint55a_post
1061    o merged code to
1062      * prescribe/read time-dependent open boundaries
1063        (works in conjunction with exf, cal)
1064      * sponge layer code for open boundaries
1065      * each boundary N/S/E/W now has its own CPP option
1066        (healthy for the adjoint)
1067    
1068    checkpoint55
1069    o up-to-date adjoint of previous breaks
1070      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1071      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1072      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1073      - carbon: * remove tr1-related adjoint verification
1074                * add ptracer as control variable
1075    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1076      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1077    
1078    checkpoint54f_post
1079    o in verification/carbin/ remove experiment related to
1080      ALLOW_PASSIVE_TRACER (array tr1 etc)
1081      code_ad/ input_ad/ results_ad
1082    
1083    o add two new packages
1084      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1085        + subject to optimization (memory)
1086      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1087        + subject to reordering (many GOTOs in the original code)
1088        + so far opps is called for every (i,j) point, and then operates in
1089          the vertical; one may want to reorder the scheme in order operate in
1090          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1091          fields)
1092    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1093      - all verification tests compile and run with linux_ia32_g77
1094      - defaults are compatible with current input files--nothing
1095        should change if you were not previously using MNC
1096      - MNC output has been added in numerous places (eg. timeave)
1097        but there are still a few writes not yet do-able with MNC
1098        (this is in progress)
1099      - flags now allow for either/or/both use of MDSIO and MNC and
1100        documentation will soon follow
1101      - numerous small formatting cleanups for ProTeX
1102    o add version info (via BUILD_INFO.h) to MNC and stdout
1103    
1104    checkpoint54e_post
1105    o add two new packages
1106      - pp81 (Packanowski and Philander, 1981), Richardson number and
1107        stratification dependent mixing
1108      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1109      - these scheme operate in a similar manner as KPP (without ghat, of
1110        course), however there is only one diffusivity that is used for both
1111        temperature and salinity (and passive tracers)ç
1112    o add offline package
1113    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1114      provided by Stephanie Dutkiewicz
1115    o genmake2: add ability to search for C compilers and cleanup test output
1116      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1117    
1118    checkpoint54d_post
1119    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1120    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1121      leading to additional shift by 5 days each year of integration
1122       (i.e. leading to considerable offset over the years)
1123    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1124    o start with no AB and no initial filtering (staggerTimeStep):
1125      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1126    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1127      (external loading & cpl import/export stay in forward_step.F)
1128    o update coupling interface to work with new staggerTimeStep
1129    o change MDSIO ptracers_pickup.
1130    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1131    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1132    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1133    
1134    checkpoint54c_post
1135    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1136      this affects (truncation error) output.txt of test-exp:
1137       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1138    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1139    o change Qnet to always be the net heat flux, (+upward).
1140      affects (truncation error) output of natl_box exp.: updated
1141    o define the max number of passive tracers in PTRACERS_SIZE.h
1142    o start to test mnc routinely in exp0
1143    o add sea-ice loading (sIceLoad) as a new forcing field.
1144    
1145    checkpoint54b_post
1146    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1147       impressive on Altix and Opteron systems)
1148    o diagnostics can now write NetCDF files through the mnc package
1149    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1150    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1151    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1152      affects (truncation error) output of lab_sea & natl_box exp.: updated
1153    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1154    
1155    checkpoint54a_post
1156    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1157    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1158    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1159    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1160      + internal_wave (shift in writing cg2d_ini_res)
1161    checkpoint54a_pre
1162    
1163    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1164      - modified verification/lab_sea and natl_box_adjoint accordingly
1165    
1166    checkpoint54
1167    checkpoint53g_post
1168    o prepare splitting of thermodynamics: store convect.counter in common block
1169    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1170      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1171    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1172    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1173    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1174    o restore adjointability
1175    
1176    checkpoint53f_post
1177    o modifications that affect AIM experiment results (update output.txt):
1178      - no advection of S at top interface Nr (pkg/generic_advdiff)
1179      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1180    o AIM pkg:
1181      - include stability function into surf.Flux derivative relative to Tsurf
1182      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1183    
1184    checkpoint53e_post
1185    o merged cylindrical coord configuration
1186    o added rotating_tank experiment
1187    checkpoint53e_pre
1188    
1189    checkpoint53d_post
1190    o faulks upgraded: re-generate output.txt that have changed:
1191       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1192    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1193    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1194    o added Sadourny discretization of Coriolis
1195      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1196      - re-enabled use of omega3 (useAbsVorticity)
1197    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1198      vector-invariant equations
1199      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1200    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1201      hopefully without new bugs
1202      - still to do: biharmonic friction for non-hydrostatic w
1203    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1204    o regenerated output for global_ocean_ebm (using -ieee)
1205    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1206      of mom_common/
1207      - simple re-arrangement of instructions within computing loop
1208    checkpoint53d_pre
1209    
1210    checkpoint53c_post
1211    o new version of coupler for AIM+thSIce and Ocean models
1212     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1213     - land: change Evaporation of snow
1214     - aim with thSIce: fix bug in snow-precip.
1215    o changes to calc_gw.F
1216     - bug fix for w^2 term near the bottom boundary
1217     - (hopefully) improve the lateral slip boundary condtions for use with
1218        partial/looped cells
1219      - because the bug fix changes two verification experiments anyway (exp5
1220        and plume on slope), change the lateral boundary condition from half slip
1221        to the value of no_slip_sides
1222    o ebm package wasnt quite up to the parallel task. Fixed that.
1223    o Adjoint of EBM package + verification
1224      * TLM OK
1225      * ADM not sufficient accuracy yet (needs further testing)
1226    
1227    checkpoint53b_post
1228    o Commiting new energy balance model to repository
1229      * package is pkg/ebm
1230      * verif. is verification/global_ocean_ebm
1231      * references are in ebm_driver.F
1232    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1233    C        Global thermohaline circulation. Part I:
1234    C        Sensitivity to atmospheric moisture transport.
1235    C        J. Climate 12(1), 71-82
1236    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1237    C        Global thermohaline circulation. Part II:
1238    C        Sensitivity with interactive transport.
1239    C        J. Climate 12(1), 83-91
1240    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1241    C        Destabilization of the thermohaline circulation
1242    C        by atmospheric eddy transports.
1243    C        J. Climate 7(12), 1870-1882
1244    o Will need long integration testing.
1245    checkpoint53b_pre
1246    
1247    o created pkg/mom_common in preparation for variable viscosity code
1248    o renamed and split ini_mnc_io
1249    o pkg/land: only liquid water can diffuse or run-off
1250    o AIM using land: soil wetness availability account for snow
1251    o added printMapIncludesZeros to EEPARMS namelist
1252    
1253    checkpoint53a_post
1254    o restore TAMC compatiility for exf_constants.h
1255      (no usage of _d in .h)
1256    o Additional storing in KPP in an attempt to fix
1257      TAMC problem with adjoint of KPP code.
1258      (no success...)
1259      Identical code works fine with TAF.
1260    o Fixed verification/natl_box_adjoint experiments.
1261      Initial conditions for Experiments 4 and 5 are now
1262      set to "SEAICE_initialHEFF=0", which is more reasonable,
1263      and hence gives results closer to that of Experiment 2.
1264      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1265    
1266    checkpoint53
1267    o stable checkpoint with up to date adjoint
1268      TLM tests only run for 1st grdchk at the moment. Its unclear if
1269      this is a code problem or a problem with resetting code for g_
1270      variables that is being autogenerated wrong.
1271      Otherwise:
1272       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1273       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1274         are both still in chaos following their security messes.
1275    
1276    checkpoint52n_post
1277    o various build (mostly genmake2) changes including:
1278      - ability to build/run more easily within Cygwin and MacOS X
1279      - more complicated Makefiles with a stronger dependence on Gnu Make
1280    o pkg/seaice modifications
1281      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1282        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1283        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1284      - changed proxy for geostrophic velocity and updated
1285        verification/lab_sea/results/* accordingly
1286      - removed ADI dynamic solver from pkg/seaice
1287      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1288        they caused a segmentation fault under certain circumstances
1289      - removed unused field WATR
1290    o bug fix in exf-package:
1291      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1292         now reflect that.
1293    o small fixes in the cal-package:
1294      - set reference date to first of January for the 'model'-calendar
1295      - failing of cal_CheckDate in cal_FullDate now actually results in a
1296        warning
1297    o small modifications in exf-package to increase flexibility:
1298      - change climtempfreeze from a constant to a runtime parameter that
1299        is specified in data.exf_clim (default = -1.9)
1300      - introduce runtime parameter windstressmax (default = 2.0) that is
1301        specified in data.exf
1302    o fix in pkg/thsice:
1303      - update Evap (Tsf changes) to be consistent with Latent heat flux
1304      - maintain snow precipitation unchanged (even if Tsf >=0).
1305     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1306    
1307    checkpoint52m_post
1308    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1309      this does not change any of the results, because myIter=0 in swfrac always
1310      lead to jwtype=2 (the default anyway), but the call makes little sense
1311      as a default
1312    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1313    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1314      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1315    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1316    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1317    o extending useSingleCpuIO option to work with new exch2 I/O format
1318      - old-style, missing-tile I/O is still accessible by defining CPP
1319        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1320    o monitor package can write to NetCDF files and/or STDOUT
1321    o fix re-definition bug in MNC_GRID_INIT_ALL()
1322    o doc/api_reference added
1323      - a framework for building an API Reference Manual using all
1324        the "protex" comments embedded in the code
1325      - see pkg/generic_advdiff, pkg/mnc for examples
1326    o MNC:
1327      - make myThid the last argument for all subroutines
1328      - new default for the grid files: NO halos
1329      - add useMNC and other run-time flags
1330      - separate per-file-group handling of the unlimited dimension
1331      - early initialization of MNC w/ flags read at the eeboot stage
1332        and lookup tables set in initialize_fixed
1333      - write all MNC output to a freshly-created directory
1334    o thermodynamics sea-ice (thsice) is now tested with testreport.
1335    o test exp. advect_cs: use the standard cs32 grid ; update output.
1336    o Added functionality to grdchk:
1337      pick global i,j,k position (or nearest wet) where to perform check.
1338    
1339    checkpoint52l_post
1340    o new land formulation:
1341      a) use ground enthalpy as prognostic variable to ensure exact
1342         energy conservation.
1343      b) account for water temperature and for latent heat of freezing
1344         in all processes (rain, run-off, ground storage)
1345      c) compute surface and ground temperature implicitly.
1346    o aim_v23 modification for new land model:
1347      a) Treat separately land / ocean / sea-ice surface fluxes
1348         to allow implicit computation of land & sea-ice surface temp.
1349      b) add snow precipitation.
1350    checkpoint52l_pre
1351    
1352    o fix problem (when 1 tile is empty) in min/max monitor.
1353    o fix bug in timeAve (u,vZetatave in common block)
1354    o no restoring terms under ice for pkg/seaice
1355    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1356    o bug fix for pkg/seaice pickups
1357    o change MNC call locations and add coordinate attributes
1358    o mask vorticity at the corner ; affects global_ocean.cs output
1359    o fix ini_curvilinear_grid ; test CS experiments with mpi
1360    o aim.5l_cs: modify sea-ice fraction input file ; update output
1361    o exf: Adding simple range check routine for exf fields after read
1362    
1363    checkpoint52k_post
1364    o removed top-level directory "diags"
1365      - we migrated these functions to pkg/timeave a long time ago
1366    o fixed bug introduced in pkg/monitor
1367    o accuracy ctrlprec = 32 insuffient for gradient checks using
1368      averaged fields (I/O via cost_averages)
1369      -> use ctrl.h in active_file*.F to control I/O precision.
1370    o paramter list of CALL ADTHE_MAIN_LOOP
1371    o added initial do_the_model_io to ecco
1372    o set all ...Freq to zero after cost_final
1373      taveFreq, dumpFreq, pChkptFreq
1374    o MAIN and ECCO differentiability restored
1375    
1376    checkpoint52j_post
1377    o fix nchklev in tamc.h for global_ocean...
1378    o Bringing flow and store directives up-to-date
1379    o Really weird thing!
1380      call do_the_model_io from the_main_loop with parameters
1381      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1382      TAF places a faulty re-call of initialise_varia
1383      after cost_final call which should not be there!
1384    checkpoint52j_pre
1385    
1386    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1387      error messages
1388    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1389    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1390      debug output
1391    o modfied mdsio_writefield.F to handle non-global files under exch2
1392    o update AIM Cubed-Sphere exp (aim.5l_cs):
1393      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1394    o update AIM Equatorial Channel exp:
1395      use standard aim_v23 pkg and change the SST fields to be more realistic.
1396    o globalFile now works with exch2
1397    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1398      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1399    o limit timeave output for hi-res integrations
1400    
1401    checkpoint52i_post
1402    o removed CPP_EEOPTIONS.h from verification/*/code
1403    o updated the tiling for global_ocean_pressure
1404    checkpoint52i_pre
1405    
1406    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1407      the old pkg/aim).
1408    
1409    checkpoint52h_pre
1410    o shortened offending lines in exch2_send_rx?.template
1411    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1412    o genmake2: add build & execute test for NetCDF code
1413    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1414      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1415    o added useSingleCPUIO flag to monitor.F and mon_out.F
1416    o added temporary hack for sea-ice dynamics on the cube:
1417      metric terms are ignored and it is assumed that
1418      there is no sea-ice on cube faces 1, 2, 4, and 5.
1419    
1420    checkpoint52f_post
1421    o added exch2 cube routines to pkg/exch2
1422    o modified hs94.cs-32x32x5 to use it
1423    o added new grid files to hs94.cs-32x32x5
1424    checkpoint52f_pre
1425    
1426    checkpoint52e_post
1427    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1428      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1429    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1430      to work with implicit vertical advection and AB ;
1431    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1432    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1433     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1434    checkpoint52e_pre
1435    
1436    o fix bug in impldiff when Nr=1 or Nr=2.
1437    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1438    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1439    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1440      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1441    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1442    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1443    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1444    
1445    checkpoint52d_post
1446    o re-tiled many expts to allow comparison in multi-processor mode
1447      - updated output accordingly
1448      - changed hs94.128x64x5 to use intial T from file rather than use the
1449        random number generator
1450    o add infrastructure in model routines for fizhi and gridalt packages
1451    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1452    o changes to permit hi-res, cubed-sphere, configuration
1453      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1454      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1455      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1456        of surface winds for the cube
1457      (A verification experiment, based on global_ocean.cs32x15, but with
1458       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1459       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1460       complete with example surface forcing files and matlab scripts to look
1461       at the output and compare it with that of global_ocean.cs32x15.)
1462    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1463       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1464       to conform to the common rule.
1465    o check-in the first version of the coupler + interfaces for multi-components
1466       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1467       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1468       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1469       - ocean and atmos. share the same horizontal grid (no interpolation).
1470       - exchanges between component and coupler is done in forward_step
1471    o new verification experiment, cpl_aim+ocn:
1472       coupled ocean - AIM atmosphere on cs32 grid.
1473    
1474    checkpoint52d_pre
1475    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1476    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1477    
1478    checkpoint52c_post
1479    o Fixing OPTIONS files for use of exf:
1480      - ALLOW_ECCO not needed
1481      - ECCO_CPPOPTIONS.h should not be included from
1482        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1483        as has been the case in the past
1484      - All cal/exf related options are currently set in
1485        single header file. Should remain so until we
1486        agree on a consistent new policy.
1487    o Removed all CPP options for cal package.
1488      cal has no more CPP options.
1489    o modified STOREs in GAD_ADVECTION
1490    o corrected key comp. for passkey
1491    
1492    checkpoint52b_post
1493    o new version: "thsice" of thermodynamic sea-ice pkg:
1494     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1495     - modify fluxes but do not change theta directly;
1496     - light cleaning of bulk_force pkg (still needed with thsice).
1497     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1498       + output_thsice.txt to test thsice & bulk_force pkgs.
1499    o put back grid & coriolis monitor output.
1500    checkpoint52b_pre
1501    
1502    o call "do_the_model_io" at the beginning (=> dump initial state)
1503    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1504    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1505      (need info on NUMBER_OF_PTRACERS)
1506    o missing PTRACERS headers in some routines
1507    o default tamc.h in pkg/autodiff supposed to crash
1508      to ensure proper customization
1509    
1510    checkpoint52a_post
1511    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1512      - moved surfaceTendencyTice from pkg/seaice to main code
1513      - subroutine FREEZE_SURFACE now limits only surface temperature
1514        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1515        => new output.txt for global_ocean.cs32x15 & global_with_exf
1516      - keep the old version of FREEZE for backward compatibility;
1517        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1518      - corresponding modifs for TAF directives
1519    o added surface flux output variables to TIMEAVE_STATVARS
1520    o time-averaged output for pkg/ptracers
1521    o fix problem with ECCO-related divided adjoint
1522      snapshot file was missing some ad-variables,
1523      but no warning issued by TAF
1524    
1525    checkpoint52a_pre
1526    o some bug fixes for #undef REAL4_IS_SLOW
1527    
1528    checkpoint52 = ecco_c52_e35
1529    o after testing adjoints of checkpoint51u_post
1530    
1531    checkpoint51u_post
1532    o this is the post-merge tag of the ecco-branch
1533      (needs another clean checkout and re-testing)
1534    o various natl_box_adjoint configs and results
1535      but no input fields
1536    o obcs adjoint not yet merged!
1537    o adding ECCO global 1x1 and 2x2 degree configs
1538    o updated/extended some store directives for seaice
1539    o pkg/ecco now containes ecco-specific part of cost function
1540    o top level routines the_main_loop, forward_step
1541      supersede those in model/src/
1542      previous input data.cost now in data.ecco
1543      (new namelist ecco_cost_nml)
1544    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1545    
1546    checkpoint51t_post
1547    o this is the pre-merge tag of the ecco-branch
1548    
1549    checkpoint51s_post
1550    o cleanup: removed various obsolete #define-s
1551    o pkg/grdchk
1552      - renamed 'ph-grd 3' to 'grad-res'
1553      - merged from ecco-branch
1554        (remaining bug fixes for obcs gradient checks)
1555      - additional high-precision output for testreport
1556        (grep for 'precision_grdchk_result')
1557    
1558    checkpoint51r_post
1559    o cleaned up or removed CPP_OPTIONS.h files
1560    o updated results for some of the tests to reflect the new
1561      optfiles (-ieee: -O0 instead of -O3)
1562    
1563    checkpoint51q_post
1564    o cd_code:
1565      - moved cd_scheme.F -> cd_code_scheme.F
1566      - separate read_checkpoint from cd_code_ini_vars.F
1567      - separated cd_code part from write_checkpoint
1568      - updated AD_SOURCE, generated .flow
1569      - added CD_CODE_VARS.h to the_main_loop
1570      - Moving cd_code specific store dir.s to pkg/cd_code
1571    o ctrl package totally restructured
1572      - pack/unpack now optional and decoupled from
1573        xx_/adxx_ I/O
1574      - ctrl_pack/unpack cleaned
1575        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1576      - confined inclusion of AD_CONFIG.h to where necessary.
1577    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1578    
1579    checkpoint51p_post
1580    o create initial cd_code package
1581      - WARNING: the initialization of fields within packages
1582        is broken because INI_FIELDS (where READ_CHECKPOINT is
1583        called) is called *before* PACKAGES_INIT_VARIABLES.
1584        This seems to be backwards since
1585        1) its important to initially zero the entire field including
1586           the "halo" region
1587        2) zeroing needs to be done *before* reading pickup info
1588           and the pickup call might or might not happen in any
1589           particular run
1590      - this needs an overhaul for R2
1591    o cleanup verification/*/code/GMREDI_OPTIONS.h
1592    o cleanup testreport
1593    
1594    checkpoint51o_post
1595    o bringing AD-related verif's up to date with genmake2
1596      - carbon/
1597      - global_ocean.90x40x15/
1598      - hs.94.1x64x5/
1599      - (front_relax/ )
1600    o (more) consistent directory structure for AD-related verif.'s
1601    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1602    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1603    o bug fix in find_alpha.F for MDJWF:
1604      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1605        change rho -> rho-rhoConst
1606      - replace call find_rho to find_rhonum
1607    o initialisation of rFlx extended to full array (required by TAF)
1608      and shifted to thermodynamics
1609    o removed PTRACERS.h in ptracers routine
1610    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1611    o Correcting initialisations for fVerU, fVerV.
1612    o helping TAF to recognize dependency on kUp for
1613      fVerU, fVerV
1614    o Replacing delZ by delR in pkg/ctrl/
1615    checkpoint51o_pre
1616    
1617    o undid all of cp51 pending some cleanups and discussion
1618    o added the [#include "AD_CONFIG.h"] statement to all files that need
1619       it for adjoint/tl #defines
1620     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1621     o removed tools/genmake since it no longer works
1622    
1623    checkpoint51n_post
1624    o modifications to make FREEZE flux visible to pkg/kpp
1625      - moved surfaceTendencyTice from pkg/seaice to main code
1626      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1627      - subroutine FREEZE now limits only surface temperature
1628        (this means new output.txt for global_ocean.90x40x15,
1629         global_ocean.cs32x15, and global_with_exf)
1630    o added surface flux output variables to TIMEAVE_STATVARS
1631    
1632    checkpoint51n_pre
1633    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1634    o added [#include "AD_CONFIG.h"] to all files that use the following
1635      defines:
1636      - ALLOW_ADJOINT_RUN
1637      - ALLOW_TANGENTLINEAR_RUN
1638      - ALLOW_ECCO_OPTIMIZATION
1639    
1640    checkpoint51m_post
1641    o incorporating changes to get TAMC/TAF working in genmake2
1642      - added new TAMC/TAF targets to the Makefile
1643      - various cleanups related to package handling
1644      - these changes should have no impact on the forward model
1645    
1646    checkpoint51l_post
1647    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1648     - faster algorithm for cal_addtime.F
1649     - higher precision arithmetic, where needed
1650     - pkg/exf *startdate variables changed from calendar date to
1651       model integration time
1652    
1653    checkpoint51l_pre
1654    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1655    o enable to apply restoring on S & T only in a latitude band.
1656    o update output (external_forcing_surf modif. change truncation errors)
1657       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1658    
1659    checkpoint51k_post
1660    o change default to: useNHMTerms=.FALSE.
1661     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1662       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1663     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1664        exp1, ideal_2D_oce
1665     - change data file of oceanic exp (leave the results unchanged for now)
1666       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1667    o set gravitySign automatically according to the vertical coordinate used
1668      (and change sign: back to "logical" value: +1 when R increases downward)
1669    o added an include barrier to the default CPP_OPTIONS.h and
1670      removed the #include "PACKAGES_CONFIG.h" from it
1671    o fix a bug in mom_fluxform (from chk51j_post)
1672    
1673    checkpoint51j_post
1674    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1675    o adjusted some flow directives (dynamics, thermodynamics)
1676    o added cubed-sphere case to test cost function
1677    o heckpoint_lev?_directives.h now include
1678      pkg-specific directives, whenever those are enabled.
1679    o Moving pkg-specific flow directives to corresponding pkg
1680      Moving pkg-specific differentiation list to corresponding pkg
1681      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1682      ---> conventions are
1683           - pkg_ad.flow
1684           - pkg_ad_diff.list
1685           - pkg_ad_check_lev?_dir.h
1686    
1687    checkpoint51i_post
1688    o merge of the branch-genmake2
1689      - knowingly breaks the older genmake
1690      - automatic generation of all ALLOW_${PKG_NAME} defines
1691      - new testreport supersedes older testscript
1692    o large number of package inclusion and header cleanups
1693    checkpoint51i_pre
1694    
1695    o new output for adjoin of global ocean vector invariant
1696    o fix for checkpoint of thermodynamic seaice and bulk_force
1697    o Steph gchem various cleanups
1698    
1699    checkpoint 51h_pre
1700    o fixed some single quotes
1701    o modify gchem pkg to be more versatile
1702    o modifications to clean up dic pkg
1703    o add pkg/cfc
1704    
1705    checkpoint51g_post
1706    o provide links for ARPACK and ADM*TLM
1707    o start removing verification/vero/
1708    o update AD-related stuff
1709      (in particular some IF-statements in model/src/ routines)
1710    o adding to verification/global_ocean.90x40x15/ adjoint of
1711      vector invariant setup
1712    
1713    checkpoint51f_post
1714    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1715    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1716      of tracer Green's fucntions for ocean inversion project.
1717    
1718    checkpoint51f_pre
1719    o Added on-the-fly spatial interpolation capability
1720        "USE_EXF_INTERPOLATION" to pkg/exf.
1721      - This is a temporary Cartesian-grid hack until
1722        the super-duper ESMF coupler becomes available.
1723      - See verification/global_with_exf/README for usage example.
1724      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1725        flags and modified pkg/seaice accordingly.
1726    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1727        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1728        non-local transport term.
1729    
1730    checkpoint51e_post
1731    o pkg/mom_vecinv:
1732      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1733      - add time-ave diagnostic of vorticity advection.
1734    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1735    o atmospheric geopotential: - include water vapor effect;
1736                                - use p^kappa in p* scaling.
1737    o land pkg: read initial state from files.
1738    o AIM : add stratospheric drag in the upper level
1739    
1740    checkpoint51d_post
1741    o change function ILNBLNK (=> last non-blank char.) to return zero
1742      (instead of the string length) when the string. char is empty
1743    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1744    o modif's to restore TAMC compatibility
1745      - avoid "_d" constructs in PARAMETER declarations
1746      - avoid interrupting lines by comment lines
1747    o Use cluster local disks for purely local I/O
1748      vs. globally visible disks needed for ctrl stuff
1749      (merged from ecco-branch)
1750      - new active_file_loc... and mdsio_..._loc routines
1751      - affected packages: autodiff, ctrl, grdchk, mdsio
1752    
1753    checkpoint51c_post
1754    o introducing integer flag debugLevel
1755      - debLevZero: suppress all output
1756      - debLevA: standard
1757      - debLevB: equivalent to current debugMode=.TRUE.
1758    o introducing pathname variable mdsioLocalDir for mdsio
1759      that can be specified at runtime
1760      (relevant for cluster I/O to local disk)
1761    `
1762    >>>checkpoint51b_post
1763    adjoint of ptracers
1764    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1765    o extended state in checkpoint_lev?, etc.
1766    o alternative ctrl/cost with tr1 or ptracer
1767    o new comlev1_bibj_ptracers
1768    o new ptracers.flow
1769    o made ptracers_forcing same as external_forcing_s
1770    o added verification for adjoint with ptracers
1771      - adm. grdchk fail so far
1772      - tlm. grdchk OK
1773      - checked tapelev/comlev recomputations: OK
1774    <<<checkpoint51b_pre
1775    
1776    checkpoint51a_post
1777    o added code for biogeochemistry package
1778      - new pkgs: dic, gchem
1779      - new subroutine in ptracers
1780    o modify code for biogeo packages
1781      - in model/src and pkg/ptracers
1782    
1783    checkpoint51
1784    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1785      - autodiff, ctrl, exf, grdchk, seaice
1786      kept separate packages
1787      - cost, ecco, obcs
1788    o updating verification/internal_wave, verification/lab_sea
1789      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1790    
1791    checkpoint50i_post
1792    o Preparing next differentiable checkpoint and sync
1793      of MAIN vs. ecco-branch
1794      - 1st step: this one is differentiable
1795      - 2nd step: next(! not this) checkpoint will have updated packages
1796                  from ecco-branch)
1797    
1798    checkpoint50h_post
1799    o new package "land": provide surface BC for AIM.
1800    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1801    o AIM: use true log-P extrapolation for near surface temp (= as in
1802        F.Molteni paper) ; update aim.5l_cs output.
1803    o New variable in PARM03 for more flexible pickups
1804    o somewhat cleaned package initialisation sequence for
1805      ctrl/ cost/ ecco/ in packages_... routines
1806    
1807    checkpoint50g_post
1808    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1809      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1810      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1811        made the default because of faster convergence than ADI
1812    
1813    checkpoint50f_post
1814    o exf totally restructured
1815      - replaced all exf_set_ routines by one generic exf_set_gen.F
1816        and made sure it's still differentiable
1817      - split exf_getffields.F into new exf_bulkformulae.F
1818      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1819      - updated adjoint/makefile and relevant verif. accordingly
1820    
1821    checkpoint50f_pre
1822     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1823          + change Evap over land. (update aim.5l_cs output)
1824     o added missing .cvsignores and made uniform across expts
1825     o changed configuration of tidal_basin_2d expt
1826     o added pkg/debug functions for tracing code in fatal crashes
1827     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1828     o new fn in pkg/monitor to stop model if solution grows too big
1829     o removed lots of single quotes from comments
1830    
1831    checkpoint50e_post
1832    o make KPP work with PTRACERS
1833     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1834       nearly a copy of kpp_transport_s
1835     - there is no analogue to SurfaceTendencyS, so I have to use
1836       gPtr(of the surface layer) instead
1837    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1838    checkpoint50e_pre
1839    
1840    checkpoint50d_post
1841    o change kpp output from multiple-record state files to single-record state
1842      files analogous to write_state.F
1843    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1844      analogous to the cg2d-related output.
1845    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1846      so that writing to internal file fn (with length 512) fails.
1847    checkpoint50d_pre
1848    
1849    checkpoint50c_post
1850    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1851    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1852    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1853    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1854    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1855    
1856    checkpoint50c_pre
1857    Merging from release1_p13:
1858    o bug fix for pkg/seaice dynamic solver
1859    o Added SEAICE_initialHEFF to pkg/seaice
1860    
1861    checkpoint50b_post
1862    o store u*,v* in gU,V instead of in guNm1,gvNm1
1863    o in order to put the momForcing out of the Adams-Bashforth:
1864      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1865      to timestep.F
1866    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1867    o re-generate output for highly sensitive test-exp:
1868       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1869    
1870    checkpoint50b_pre
1871    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1872    o corrected CPP option mismatch in exf_Bulk... functions for case
1873      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1874    
1875    checkpoint50a_post
1876    o Bug fix for merging between c50 and KPP.
1877      ikey was passed from thermodynamics to kpp_calc via
1878      common block rather than being recomputed in kpp_calc,
1879      in contradiction with new key itdkey.
1880      New key ikppkey created, and tamc.h headers updated.
1881    
1882    checkpoint50
1883    - 2nd step of merge with ecco-branch:
1884      merge changes in ecco-branch back into main trunk
1885    - bug fix in find_alpha
1886    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1887    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1888    - merged some sliced AD support routines
1889    
1890    checkpoint49
1891    merged from ecco-branch:
1892    o exf:
1893      - Enable initialisation of forcing fields to constant
1894        (runtime) values.
1895      - in exf_getffields.F
1896        Reduce i-/j-loop to interior domain, discarding overlaps.
1897        That also fixes wrong TAF-key computations for key_1, key_2
1898        with bulf formulae.
1899      - exf_init.F modify #ifdef for exf_init_evap
1900      - exf_getffieldrec.F, ctrl_getrec.F
1901        The following INT-usages are not safe:
1902          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1903          fldcount = int(fldsecs/fldperiod) + 1
1904        and were modified.
1905    o autodiff: checkpoint_lev...
1906      - updated storing for bulk formulae (some arrays were missing)
1907      - added state for seaice package
1908      - synchronized with main branch
1909    o DIVA:
1910      Modif.s in
1911      - the_main_loop.F
1912      - the_model_main.F
1913      and added cost_final_restore.F cost_final_store.F
1914      o With these changes, it is possible to fully separate
1915        the first forward run to compute the cost function (mdthe_main_loop)
1916        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1917        into separate model executions.
1918        This enables better tuning of DIVA to given queue sizes.
1919      o Loss of cost function value in consecutive DIVA runs is
1920        fixed by storing to 'costfinal' file.
1921      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1922        beginning/end of adjoint integration is accounted for.
1923      The current changes apply to TAF-1.4.26.
1924      TAF has one remaining bug, requiring one manual change
1925      (see MITgcm manual).
1926    o cal: synchronized between MAIN and ecco-branch
1927    
1928    checkpoint48i_post
1929    o Changes to restore differentiability of code w.r.t. previous tag
1930      (mostly adding new routines to make list and replacing
1931      pressure by totPhiHyd).
1932    o Updated and merged grdchk package
1933      - has both ADM and TLM checks
1934      - works for single- and multi-proc.
1935      - output cleaned
1936      - worked successfully for parallel DIVA
1937    o genmake:
1938      - Adding -platform=SP4
1939      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1940    o Modif. for DIVA:
1941      ctrl_unpack should not be called in intermediate DIVA interval.
1942      (similar thing would apply for active files such as
1943      tbar, sbar, psbar, which should not be reinitialised;
1944      only relevant for ecco-branch)
1945    
1946    checkpoint48h_post
1947    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1948    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1949    o Added SEAICE_initialHEFF to pkg/seaice
1950    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1951    
1952    checkpoint48g_post
1953    --- EOS:
1954    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1955      store total Potential in totPhyHyd for diagnostics & EOS.
1956    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1957    --- Pressure/geopotential gradient:
1958    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1959    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1960      ( changes results of global_ocean_pressure )
1961    o NLFS + z-coord.: add eta*Rho' contribution.
1962    o accurate phiHyd when using interface-W at the middle between 2 centers
1963     ( changes results of ideal_2D_oce )
1964    o includes r* 2nd term in potential gradient.
1965    
1966    checkpoint48f_post
1967    Merging from release1_p12:
1968    o Modifications for using pkg/exf with pkg/seaice
1969      - improved description of the various forcing configurations
1970      - added basic radiation bulk formulae to pkg/exf
1971      - units/sign fix for evap computation in exf_getffields.F
1972      - updated verification/global_with_exf/results/output.txt
1973    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1974      (SBO) core products, including oceanic mass, center-of-mass,
1975      angular, and bottom pressure (see pkg/sbo/README.sbo).
1976    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1977      to avoid negative values in shallow regions.
1978      - updated verification/natl_box/results/output.txt
1979      - updated verification/lab_sea/results/output.txt
1980    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1981    o Added useSingleCpuIO option (see PARAMS.h).
1982    o Updated useSingleCpuIO option in mdsio_writefield.F to
1983      work with multi-field files, e.g., for single-file pickup.
1984    o pkg/seaice:
1985      - bug fix in growth.F: QNET for no shortwave case
1986      - added HeffFile for specifying initial sea-ice thickness
1987      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1988    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1989      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1990    o pkg/seaice:
1991      - adjoint-friendly modifications
1992      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1993    
1994    checkpoint48e_post
1995    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1996    o dynamics: change definition of computational domain & adapt mom_fluxform
1997      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1998    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1999        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2000        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2001        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2002        inverted_barometer solid-body.cs-32x32x1
2003      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2004    
2005    checkpoint48d_post
2006    o in preparation for r*:
2007     a) use pre-computed gradient of hydrostatic potential:
2008        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2009     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2010        => affects results of glob_oce_pressure (different truncation error)  
2011      update output.txt of ideal_2D_oce & global_ocean_pressure
2012    
2013    checkpoint48d_pre
2014    o in preparation for r*:
2015      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2016      pass the 2 comp. of the grad. as arguments to momentum S/R.
2017      but for the moment, only used if it does not change the results.
2018    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2019    
2020    checkpoint48c_post
2021    Modifications in treatment of initial flux forcing controls
2022    to avoid extra storing of flux fields.
2023    
2024    checkpoint48c_pre
2025    o Added tidal_basin_2d experiment (currently 1D!)
2026    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2027    
2028    checkpoint48b_post
2029    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2030     (modification to pressure gradient not yet implemented)
2031    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2032      (for U & V) that are used for vertical advection of momentum.
2033    
2034    checkpoint48a_post
2035    o In preparation for r*, use temp. array to compute vertical transport
2036       in flux-form momentum pkg. => change results of few test-exp.
2037      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2038                        lab_sea, natl_box & plume_on_slope
2039    
2040    checkpoint48
2041    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2042    
2043    checkpoint47j_post
2044    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2045    o moved adexch from forward_step to addummy_in_stepping
2046    o added exch in ctrl_map_...
2047    o aveFreq.=0. at end of cost_final to avoid overwrite in
2048      reverse checkpointing loop
2049    o Yet more changes in gmredi:
2050      * adgmredi_calc_tensor
2051        avoiding all recomputation of gmredi_slope_limit
2052      * adgmredi_x/y/rtransport
2053        added flag for excessive storing to avoid recomp. of
2054        u/v/rtans, dTdx/y/z
2055        -> this is not really necessary and very memory-consuming
2056      * adgmredi_slope_psi:
2057        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2058      * gmredi_slope_limit
2059        re-activated full calculation of taperfct for case 'ac02'
2060    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2061    
2062    checkpoint47i_post
2063    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2064    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2065      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2066    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2067    o gmredi: fix few bugs.
2068    
2069    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2070    This will be a good checkpoint to plug into the ecco-branch.
2071    o few modif.'s to get latest version adjointed
2072      (mainly kick out code in ini_linear_phisurf)
2073    o modif's to run adjoint with exactConserv
2074    o case GM_BOLUS_ADVEC should be cleaned
2075      S/R gmredi_slope_psi should be cleaned
2076    o verification/carbon now has exactConserv=.TRUE.
2077    
2078    checkpoint47g_post
2079    o time-average AIM output: becomes independent from statvars time-average
2080      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2081    o After TAF bug fix:
2082      Tested adjoint of gmredi package.
2083      Tests were done with checkpoint47 rather than with latest
2084      checkpoint47f_post since the latter is broken for the adjoint
2085      verification/carbon/ contains both ADM and TLM gradient checks.
2086    Here they are, before they get changed/lost/stolen.
2087    Mostly modif.'s to fix numerical sensitivities.
2088    Gradient checks OK for
2089    - GM_taper_scheme:
2090      * clipping
2091      * ac02
2092      * linear
2093      * glw91
2094      * dm95
2095      * ldd97
2096    - GMREDI_OPTIONS:
2097      * GM_VISBECK_VARIABLE_K
2098      * GM_NON_UNITY_DIAGONAL
2099      * GM_EXTRA_DIAGONAL
2100      * GM_BOLUS_ADVEC
2101    in conjunction with data.gmredi parameters to be checked in
2102    in a few minutes under verification/carbon/code/
2103    
2104    checkpoint47f_post
2105    Merging from release1_p10:
2106    o modifications for using pkg/exf with pkg/seaice
2107      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2108        and SEAICE_EXTERNAL_FLUXES
2109      - pkg/exf CPP options EXF_READ_EVAP and
2110        EXF_NO_BULK_COMPUTATIONS
2111      - usage examples are Experiments 8 and 9 in
2112        verification/lab_sea/README
2113      - verification/lab_sea default experiment now uses
2114        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2115    
2116    checkpoint47e_post
2117    o created a tag prior to creating a branch
2118    
2119    checkpoint47d_post
2120    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2121      at the bottom boundary had an erroneous half slip boundary condition
2122    o added bottom drag and no slip boundary condition capabilities to
2123      oceanic pressure coordinates code
2124    o added new verification experiment global_ocean_pressure, this experiment is
2125      also described in the tutorial section of the manual
2126    checkpoint47d_pre
2127    
2128    checkpoint47c_post
2129    o Added a verification experiment for a global cubed-sphere ocean run
2130      -  verification/global_ocean.cubed32x32x30
2131      -  uses pkg/therm_seaice and pkg/bulk_forcing
2132    
2133    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2134    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2135      when using P-coordinate; only implemented for atmospheric config.
2136    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2137      NOTES: requires option NONLIN_FRSURF to be "#define".
2138    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2139    
2140    checkpoint47b_post
2141    Merging from release1_p9:
2142    o pkg/seaice
2143      - removed GOTO's and added taf directives
2144      - double precision constants to reduce the g77 (Linux)
2145        to F77 (SGI) differences reported in release1_p8
2146    o tools/genmake
2147      - added SGI options
2148    o verification/testscript
2149      - updated to that of checkpoint47a_post
2150    o verification/global_ocean.90x40x15/input/eedata
2151      - modified for SGI f77 compatibility
2152    o verification/lab_sea
2153      - added description of sea-ice model
2154      - added missing matlab routines
2155      - added test of thermodynamics parallelization
2156    
2157    checkpoint47a_post
2158    o new pkg: aim_v23
2159     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2160       for now, keep the same surface forcing as before.
2161     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2162     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2163     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2164    o add diagnostic of surface correction term in monitor output
2165    
2166    o bulk_force and therm_seaice
2167    - Two packages:  bulk_force (Bulk forcing)
2168      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2169    - Earlier integration from Stephaine Dutkiewicz
2170      and Patrick Heimbach.
2171    - Two ifdef statements for compile time,
2172       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2173    
2174    checkpoint47
2175    differentiable version of checkpoint46n_post
2176    o bug fix in quasihydrostaticterms
2177    o * "clean" adjoint code (in terms of extensive recomputations)
2178        can now be obtained for all GMREDI options (i.e. for
2179        - GM_VISBECK_VARIABLE_K
2180        - GM_NON_UNITY_DIAGONAL
2181        - GM_EXTRA_DIAGONAL
2182        - GM_BOLUS_ADVEC )
2183      * However, wrong gradient check problem remains unsolved.
2184      * New CPP options have been introduced for different
2185        tapering schemes
2186    o external_fields_load now part of differentiation list
2187    o pressure needs multiple storing;
2188      would be nice to have store_pressure at beginning or
2189      end of forward_step, e.g. by having phiHyd global (5-dim.)
2190      (NB: pressure is needed for certain cases in find_rho,
2191      which is also invoked through convective_adjustment).
2192    o recomputations in find_rho for cases
2193     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2194    o #define ATMOSPHERIC_LOADING should be differentiable
2195    o ini_forcing shifted to begining of initialise_varia
2196    o Incorporating QNVS line search routines into MITgcm
2197      (this is separate code, and therefore not under pkg)
2198      lsopt/, optim/
2199    o Updated verification/carbon/
2200      - #define GM_VISBECK_VARIABLE_K
2201      - GM_taper_scheme    = 'ldd97'    
2202    
2203    checkpoint46n_post
2204    Merging from release1_p8:
2205    o verification/natl_box:
2206      updating new external_fields_load routine
2207    o New package: pkg/seaice
2208      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2209      The sea-ice code is based on Hibler (1979-1980).
2210      Two sea-ice dynamic solvers, ADI and LSR, are included.
2211      In addition to computing prognostic sea-ice variables and diagnosing
2212      the forcing/external data fields that drive the ocean model,
2213      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2214      The implied surface heat flux is then stored in variable
2215      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2216      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2217      non-local transport term.  Because this call precedes model
2218      thermodynamics, temperature under sea-ice may not be "exactly" at
2219      the freezing point by the time theta is dumped or time-averaged.
2220      N.B.: fairly large differences in accuracy occur across
2221            different platforms/compilers; comparison between
2222            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2223            generated output gives:
2224       T           S           U           V
2225      C D M    c        m  s        m  s        m  s        m  s
2226      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2227      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2228      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2229    
2230      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2231    o GAD:
2232      - generated new common blocks to account for call of
2233        same gad routines with differing traceridentities
2234        (needed to modify tracerIdentity indices in GAD.h)
2235      - generated separate common blocks for case useCubedSphereExchange
2236        (Department of Futurology)
2237      - parameter lists to gmredi_?transport: added tracerIdentity
2238      - added new key indices to tamc.h
2239    o external_fields_load:
2240      - added this routine to TAF list
2241      - needed to make some common blocks global and additional storing
2242        along the same lines as exf package (checkpoint_lev?_directives.h)
2243    o exf:
2244      updated external forcing package
2245      - bug fixes carried over from ecco-branch
2246        (missing OBCS_OPTIONS.h in two routines)
2247      - enable easy to use "no forcing".
2248      - added exf I/O for atmospheric loading
2249      - added exf I/O for runoff data
2250      - transfered scaling between exf <-> MITgcm to exf namelist
2251    o Adding new verification experiment global_with_exf.
2252      This verification experiment is almost identical to the
2253      global_ocean.90x40x15 experiment, except that it uses
2254      the exf (and cal) package instead of the
2255      external_fields_load routine (cf README file).
2256    
2257    checkpoint46m_post
2258    o modified testscript to return -- when there are no lines of "%MON" output
2259    o added new flag "quasiHydrostatic" for QH mode
2260      and new routine quasihydrostaticterms()
2261    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2262      New routine: mom_u_coriolis_nh()
2263    o fixed sign of non-hydrostatic metric terms in u and v equations.
2264      Depend on correct sign of gravitySign.
2265    o added work.pc* to .cvsignore in aim directories using ifc
2266    o introduced flag for controllin non-hydrostatic metric terms
2267    o removed gravitySign from PARM04
2268    o switched to g77/ifc from pgf77 in aim experiments
2269    
2270    checkpoint46l_post
2271    o made convective adjustment work with pressure coordinates:
2272     - changed the direction of k-loop in convective_adjustment.F for the
2273       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2274     - adjusted the reference pressure k-index in convective_adjustment.F
2275     - adjusted the convection condition in convect.F (in analogy to
2276       calc_ivdc.F)
2277     - convective_adjustment no longer computes anything on the halos
2278     - removed the warnings about negative salinity from find_rho.F and
2279       find_alpha.F; instead the new routine look_for_neg_salinity, called
2280       at the beginning of find_rho, find_alpha, and find_beta, does a
2281       check of the entire slice, if CPP-option
2282       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2283    checkpoint46l_pre
2284    
2285    checkpoint46k_post
2286    o fixed the verification/global_ocean.90x40x15 experiment:
2287     - new bathymetry (the world according to A., JMC, and M.)
2288     - new initial fields and forcing fields (*.bin files)
2289     - new POLY3.COEFFS (for the next release one should switch to a full
2290       equation of state: JMD95P or MDJWF)
2291     - fixed several errors and redundancies in the data file
2292     - experiment uses looped cells
2293     - added matlab directory with diagnostic scripts for plotting of output
2294    
2295    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2296     - read AIM physics parameters from a file (data.aimphys)
2297     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2298    
2299    checkpoint46j_post
2300    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2301    o move wVel computation at the end of the time step, in S/R integr_continuity
2302    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2303    o update timeave pkg for wVel diagnostic.
2304    checkpoint46j_pre
2305    
2306    checkpoint46i_post
2307    o Clean up AIM package (and keep the results unchanged):
2308      include CPP_OPTION and use IMPLICT NONE in all routines ;
2309      declare all the variables _RL ; use _d 0 for all numerical constants.
2310      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2311    
2312    checkpoint46h_post
2313    o cleaned up the use of rhoNil and rhoConst.
2314      - rhoNil should only appear in the LINEAR equation of state, everywhere
2315        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2316        and the dynamical equations are all divided by rhoConst
2317    o introduced new parameter rhoConstFresh, a reference density of fresh
2318      water, to remove the fresh water flux's dependence on rhoNil. The default
2319      value is 999.8 kg/m^3
2320    o cleanup up external_forcing.F and external_forcing_surf.F
2321      - can now be used by both OCEANIC and OCEANICP
2322    checkpoint46h_pre
2323    
2324     Added code to convert surface volume flux (fresh water) into
2325     a mass flux when using P coordinates in the ocean (OCEANICP).
2326     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2327    
2328    checkpoint46g_post
2329    o Include a new diagnostic variable phiHydLow for the ocean model
2330      - in z-coordinates, it is the bottom pressure anomaly
2331      - in p-coordinates, it is the sea surface elevation
2332      - in both cases, these variable have global drift, reflecting the mass
2333        drift in z-coordinates and the volume drift in p-coordinates
2334      - included time averaging for phiHydLow, be aware of the drift!
2335    o depth-dependent computation of Bo_surf for pressure coordinates
2336      in the ocean (buoyancyRelation='OCEANICP')
2337      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2338        Theta, Salinity, and Pressure in the parameter list. This routine is
2339        presently contained in find_rho.F. This routine does not give the
2340        correct density for 'POLY3', which would be a z-dependent reference
2341        density.
2342    o cleaned up find_rho
2343      - removed obsolete 'eqn' from the parameter list.
2344    o added two new verification experiments: gop and goz
2345      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2346    checkpoint46g_pre
2347    
2348    checkpoint46f_post
2349    o Enable tangent linear (forward mode) gradient checks:
2350      - extended active file handling to g_... files
2351      - added TANGENT_SIMULATION to theSimulationMode
2352      - extended grdchk package accordingly
2353    o added tangent linear setup in verification/carbon/code_ftl
2354    o added adjoint setup in verification/front_relax/code_ad
2355    
2356    checkpoint46e_post
2357    o Added new equation of state -> MDJWF
2358      - EOS of McDougall et al., 2002, JAOT, submitted
2359      - caveat: the equation of state is only valid for a smaller (more
2360        realistic?) range of values than JMD95P/Z and UNESCO
2361      - added masks to the calculation of pressure in store_pressure
2362      - added more check values for density in check_eos (ini_eos.F), some of
2363        the old check values are out of the range of the MDJWF-eos, so don't
2364        expect perfect matches for those
2365    checkpoint46e_pre
2366    
2367    checkpoint46d_post
2368    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2369      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2370      case of pressure coordinates. eosType='JMD95Z' in
2371      combination with buoyancyRelation='OCEANICP' now causes an error.
2372    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2373      in find_alpha/beta.
2374    checkpoint46d_pre
2375    
2376    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2377      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2378    
2379    checkpoint46c_post
2380    o Changes necessary for ocean in p-coordinates
2381     -  Added new buoyancy relation = 'OCEANICP'
2382     -  Added new parameters = gravitySign (this used to be contained inside
2383        the factor dRdZ which I added when we first switched to R coordinates).
2384     X GM/Redi is not compatible (yet)
2385     X bottom drag and no-slip need to be debugged.
2386    checkpoint46c_pre
2387    
2388    checkpoint46b_post
2389    o Added new equation of state -> JMD95Z and JMD95P
2390      - EOS of Jackett and McDougall, 1995, JAOT
2391      - moved all EOS parameters into EOS.h
2392      - new routines ini_eos.F, store_pressure.F
2393    o Added UNESCO EOS, but not recommended because it requires
2394      in-situ temperature (see JMD95)
2395    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2396      unesco.f to be used with POLY3
2397    checkpoint46b_pre
2398    
2399    checkpoint46a_post
2400    o Added (atmospheric) pressure loading
2401      - new field in FFIELDS.h, etc...
2402      - new cpp flag ATMOSPHERIC_LOADING
2403    o Changed hFacC to _hFacC in calc_phi_hyd.F
2404    o Added SHORTWAVE_HEATING to some files for consistency
2405    checkpoint46a_pre
2406    
2407    checkpoint46
2408    further merges from release1_p5
2409    o new ctrl package
2410      - adopted from ECCO environment to enable optimization
2411      - added Eliassen Palm fluxes to controls
2412    o added Eliassen Palm flux controls to gradient check package
2413    o cost package
2414      - Compatible with new ctrl package
2415      - added Eliassen Palm cost hooks
2416      - modif's of existing cost functions
2417    o Adjoint-related bug fixes in kpp:
2418      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2419      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2420    o autodiff package
2421      - flow directives:
2422        + new for S/R do_the_model_io
2423        + enhanced for S/R checkpoint
2424        + new gmredi.flow
2425      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2426        disable adcommon.h/g_common.h by default.
2427      - fixed problem for adjoint of global_max
2428    o modified verification/carbon/
2429    o New setup for adjoint of global_ocean
2430    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2431    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2432    o incorporated hooks for sponge layer code (external_forcing.F)
2433    
2434    checkpoint45d_post
2435    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2436    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2437      (affects plume_on_slope "cg2d" output)
2438    o add new parameter deltaTfreesurf for free-surface time stepping
2439    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2440    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2441    o change phiMin in exp1 (to agree with documentation)
2442    o add new flags:
2443     - T,S forcing inside/outside Adams-Bashforth
2444     - turn off temp,salt advection and/or forcing
2445     - for each tracer, define internal flag for multiDimAdvection & A-B
2446    o monitor: change definition of KE to check conservation of Energy
2447    
2448    checkpoint45c_post
2449    o Removed f90 comments ("!")
2450    o Modified initialisations to enable exf package for MITgcm
2451      (without invoking ECCO_PACKAGE).
2452    o modifications to gradient check package (Martin Losch)
2453      - enable centered differences
2454      - modified format of standard output
2455    
2456    checkpoint45b_post
2457    o cleaned exchange calls in cg2d
2458    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2459    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2460      to configure barotropic setup (Martin Losch)
2461    o moved some initialisations within bi,bj loop in dynamics
2462      (TAF flow dependency)
2463    o in initialise_varia, moved call packages_init_variables
2464      before convective_adjustment_init
2465      (corresponding adjustment of TAF tape initialisation).
2466    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2467    
2468    checkpoint45a_post
2469    o compute Rho over the whole domain (extend iMin,jMin indices)
2470    o specific exchange for X-slice domain (case Ny=1)
2471    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2472    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2473    
2474    checkpoint44h_post = checkpoint45
2475    o Fix to restore differentiability:
2476      place at which packages_init_variables is called in
2477      initialise_varia is crucial for reverse control flow.
2478    o modifications in GMRedi to enable stable adjoint
2479      (corresponding modif's in thermodynamics, dynamics)
2480    o added missing hook for sponge layer code in external_forcing
2481    o modified test cost functions
2482    o storing in gad_advection (plus removal of write(0,*)!
2483    o missing headers TR1.h added in convective_adjustment routines
2484    o errorMessageUnit set non-equal zero in eeboot
2485      (conflict on some platforms, e.g. IBM SP3)
2486    o modified carbon verif.
2487    
2488    checkpoint44h_pre
2489    o vertical grid option: allow to put the Interface at the middle between
2490      2 cell-centers ; replace delZ in pkg/kpp by drF.
2491    o GM Advective form: Tracers are advected using the residual transport (=
2492      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2493    
2494    checkpoint44g_post
2495    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2496      results) ; ifdef missing in thermodynamics.F
2497    
2498    checkpoint44f_pre,checkpoint44f_post
2499    o added PTRACERS package
2500      This allows an arbitrary number of passive tracers to be integrated
2501      forward simultaneously with the dynamicaly model.
2502      + Implemented so far:
2503        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2504        - I/O and checkpointing
2505        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2506      + Not implemented so far:
2507        - KPP
2508        - OBCS
2509      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2510        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2511        line in data.pkg.
2512      + This package is disabled by default since it increases storage.
2513    
2514    
2515    o testscript: added -cleanup option
2516    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2517                 b) enable to filter 2D fields.
2518    
2519    checkpoint44e_pre,post
2520    o re-wrote convective adjustment to use pre-calculated weights
2521      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2522      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2523      Original calls to convect() still in place.
2524    
2525    chkpt44d_pre,post
2526    o added missing EXCLUDE_MONITOR flags
2527    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2528      (incompatible typ in MIN/MAX expressions caused problems
2529      on IBM SP3)
2530    o in genmake added variable MAKEDEPEND
2531      plus resetting for case SunOS
2532    o added timer_stats.c routine for IBM SP3
2533    o removed variables in dynamics
2534    !!! I forgot to create tag chkpt44d_pre !!!
2535    !!! But chkpt44d_pre = chkpt44c_post    !!!
2536    
2537    o real fresh water flux implemented with non-linear free-surface.
2538    
2539    chkpt44c_pre,post
2540    o few fix (mask in shap_s2, EmPmR in external_field_load,
2541      USE_NATURAL_BCS in solve_for_P);
2542    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2543    
2544    checkpoint44b_pre/_post
2545    o merge of relevant stuff from the ecco-branch:
2546      - genmake: removed $S64 overwrite for case SunOS
2547      - pkg/exf: update and corrections for field swapping and obcs
2548      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2549                  harmonized between ECCO and MITgcm
2550      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2551                      updated checkpointing_lev... lists for obcs
2552      - model/src: minor changes in forward_step, plot_field
2553                   added directive for divided adjoint in the_main_loop
2554      - pkg/mdsio: added mdsio_gl_slice
2555    
2556    o check parameters & config (chkpt44a_pre,post)
2557    o OBC and NonLin_FrSurf.
2558    
2559    checkpoint44
2560    o fix bug in mom_vi_del2uv
2561    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2562    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2563    o update AIM experiments (NCEP input files)
2564    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2565    o added some stuff for AD
2566    
2567    checkpoint43
2568    o added two new advection tests
2569    o added global 4x4 degree ocean test
2570    o added test of H&S94 with free surface on cube
2571    o some final mods for gradient check, adjoint,...
2572    
2573    checkpoint42
2574      Fixed AD-related problems:
2575    o Store directives up-to-date with re-arranged Adams-Bashforth
2576      (mainly thermodynamics.F)
2577    o New store directives for multi-dim. advection schemes
2578      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2579      * new common block and key passkey
2580      (mainly gad_advection.F)
2581    o Modified store directives for split of dynamics/thermodynamics
2582      for the case ALLOW_KPP
2583    o Cleaned argument list for timestep_tracer.F
2584    
2585    checkpoint41
2586    o re-formatted/added comments in prologues of key subroutines
2587      to work with protex
2588    
2589    checkpoint40
2590    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2591    o added FLT (floats) package from Arne along with demo. experiment
2592    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2593      implementation of forward-in-time forcing terms
2594    o more mods for non-linear free-surface including new variable
2595    o modified multi-dim method to work on cube
2596    o bug fix in KPP (from DM)
2597    
2598    checkpoint40pre9
2599    o added DST advection schemes
2600    o fix MPI bug on SGI's
2601    o modifications for non-linear free-surface
2602    o fixed conditionals for fixed flow/passive tracer only mode
2603    o added tension/strain form of stress tensor
2604    o changes to commenting of arguments for TAF/TAMC
2605    o added/updated many matlab scripts
2606    o added multi-dimensional advection method for tracers
2607      
2608    checkpoint40pre8
2609    o new package rw/
2610      Added method for dumping intermediate local arrays:
2611      mdsio_writetile - same as mdsio_writefield except works from inside
2612                        bi,bj loop
2613      mdsio_writelocal - same as mdsio_writetile except works for local
2614                         arrays
2615      write_local_r? - higher-level wrapper for mdsio_writelocal
2616      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2617      Example given at end of mom_vecinv.F that dumps some local arrays.
2618    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2619      control flux-form versus vector invariant code.
2620      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2621      or genmake -DISABLE ...
2622    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2623      (additional storing is now needed for case vecinv;
2624      currently nothing implemented to switch this storing off
2625      in case fluxform is used since no CPP flag available).
2626    
2627    checkpoint40pre7
2628    o bug fix in dynamics.F
2629      calc_viscosity called before k=1,Nr loop.
2630    o added some #ifdef's ALLOW_PASSIVE_TRACER
2631    o cleaned initialisations in ctrl_map_ini
2632      related to TAF
2633    
2634    checkpoint40pre6
2635    o split dynamics into thermodynamics & dynamics
2636    o corresponding split of calc_diffusivity into
2637      calc_diffusivity, calc_viscosity
2638      (kpp_calc_diff, kpp_calc_visc).
2639    o Added diffkr, kapgm to control variables
2640    o bug fix in gmredi_slope_limit for ldd97
2641    
2642    checkpoint40pre5
2643    o proper initialization of Adams-Bashforth time stepping
2644      + uses forward step for very first step of model (iter=0)
2645    o re-generated *all* output since almost all output is modified by this
2646      change (sorry but we've been putting this one off for about 2 years)
2647      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2648        *not* regenerated since they are already out of date and I don't
2649        want to create the impression that they are suddenly working.
2650    o removed KAP stuff for DEC's
2651    o modified/added many .cvsignore files in */code and */input
2652    o added new expt "solid-body.cs-32x32x1"
2653      + this uses an alternative form of ini_curvilinear_grid.F which
2654        is not necessarily any better than the current one...
2655    
2656    checkpoint40pre4
2657    o added re-initialisations of utrans,vtrans,rtrans in
2658      calc_common_factors which are crucial for TAF.
2659    o extended iMin,jMin range for calc_common_factors,
2660      calc_diffusivity
2661    o added option ALLOW_PASSIVE_TRACER
2662    o a few minor updates and fixes
2663    
2664    checkpoint40pre3
2665    o created calc_gtr1.F for gad package
2666    o split the_main_loop and re-introduced forward_step
2667    o some recomputations of nIter0 for TAMC
2668    
2669    checkpoint40pre2
2670    o Updated to latest branch of AJA, JMC
2671    o Added gradient check package
2672    o Added routines for passive tracer handling
2673    o Added carbon sequestration sensitivity experiment
2674    
2675    checkpoint39
2676     o Modifications and fixes to support TAMC
2677       (mainly missing or wrong directives)
2678     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2679       in addummy_in_stepping
2680     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2681     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2682     o Included following packages:
2683       cal: calendar
2684       exf: external forcing
2685       ecco: essential routines to control use of cal, exf
2686             (NB: this is not the full ECCO environment)
2687     o disabled some packages by default in genmake
2688    
2689    checkpoint38
2690     o see notes_c37_adj.txt
2691     o corrected wrong layer index in external_forcing_t
2692     o replaced the_main_loop/forward_step by the_main_loop
2693     o removed forceoutput from write_state
2694       (replaced criteria for initial/final state)
2695     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2696    
2697    checkpoint37
2698     o mdsio.F routine split and packaged in pkg/mdsio
2699       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2700        used unless genmake -disable=mdsio)
2701     o allow a more precise surface-geopotential gradient for the atmosphere
2702       taking into account the change in space of Alpha (=1/rho) at the surface.
2703     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2704       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2705     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2706       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2707       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2708     o Time-Average diagnostics defined as a pseudo package "timeave".
2709     o pickup files : old pickup (before c35) did not work with new code (c35
2710       and after) unless activating 2 commented lines in initialise-varia.
2711     o Non-Hydrostatic pickup file Pb fixed.
2712     o bug with Rigid-lid version (since c35) fixed.  
2713    
2714    checkpoint36
2715     o implement Crank-Nickelson barotropic time-stepping
2716     o recover Time-Average diagnostics
2717     o fix Pb in checkpoint (PR#19)
2718     o AIM become a standard package ; clean unused CPP_kees
2719    
2720    checkpoint35
2721     o subtantial rewrite of dynamics.f
2722     o allows staggered time-stepping
2723     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2724     o added bottom drag (linear + quadratic)
2725    
2726    checkpoint34
2727     o Modified exchange routines for correct reverse simulation.
2728     o Added verification output to comply with bug fix in impldiff.F
2729       as of c33 (exp2, natl_box).
2730     o Corrected store directives in dynamics.F
2731     o Corrected array boundaries in impldiff.F
2732     o Corrected array dimensions in gmredi.
2733       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2734     o Added routine GLOBAL_SUM_INT to global_sum.F
2735     o Added mdsio_gl.F for ECCO purposes.
2736    
2737    checkpoint33
2738     o Fixed bug in lower BC in impldiff.F
2739     o Fixed confusion about units of forcing arrays in FFIELDS.h
2740       namely Fu,Fv,Qnet,Qsw,EmPmR:
2741       - Removed verification/natl_box/code/external_fields_scale.F
2742         (did not differ from that in model/src)
2743       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2744         (see FFIELDS.h for description)
2745       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2746         kpp_calc.F and kpp_transport_t.F
2747       - Removed model/src/external_fields_scale.F and calls to it
2748       - verification/natl_box uses flux data with "atmospheric" sign so
2749         a special version of external_fields_load.F is used to
2750         change the data as it's read in. This way, the arrays
2751         have the right units and signs at all times tha a user could
2752         possibly use them.
2753     o Corrected genmake to delete a temporary file during configuration
2754    
2755    checkpoint32
2756     o Scaling of forcing fields moved from external_forcing.F to
2757       external_fields_scale.F, called directly after loading fields.
2758     o Surface relaxation terms added to surface tendency fields in
2759       extra subroutine.
2760     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2761       fields.
2762     o Changes in GMRedi to comply with packaging structure.
2763     o Modifications and bug fixes in KPP package.
2764     o Verification experiment for KPP added (verification/nat_box/)
2765    
2766    checkpoint31
2767     o Packages interface brought in line with defined standard
2768       -> new routines packages_...F
2769       -> changes in initialise_fixed.F, initialise_varia.F
2770       -> enables initialisation interface for ECCO package
2771     o Rescaling of external forcing fields immediately after read
2772       (removed from external_forcing.F)
2773       -> new: surface_fields_scale.F
2774       -> affects ini_foorcing.F, external_fields_load.F
2775     o Computation of surface tendencies before tendency updates.
2776       -> new: external_forcing_surf.F
2777     o Change of variable names useGMRedi, useKPP, useECCO
2778     o Further changes in dynamics.F, impldiff.F for TAMC
2779     o Tested for experiments 0, 2, 4.
2780       - not yet tested for GMRedi.
2781       - not yet tested for KPP.
2782    
2783    checkpoint30
2784     o Updates for OBCs
2785     o New experiment for test OBCs (internal_wave)
2786     o New output.txt in verification/exp4/results/
2787     o Updates for KPP: calculation of viscosity corrected, new variables
2788       kpp_dumpFreq and kpp_taveFreq
2789     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2790       and entry for T90 in genmake
2791    
2792    checkpoint29
2793     o packaged KPP and GM/Redi
2794    
2795    checkpoint28
2796     o Corrected initialization of hFacMin for difference vertical coordinates
2797     o Modified calculation of partial cell thickness to more robust algorithm
2798     o config_summary.F: replaced write_1D_... by write_0D_...
2799       read_write.F: added subroutines write_0D_...
2800     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2801       included some initialisations required for TAMC.
2802     o routine calc_isoslopes: modified sqrt computation to make it
2803       differentiable for zero argument.
2804     o routines dynamics, impldiff:
2805       included store directives and tape key computations required for TAMC.
2806     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2807    
2808    checkpoint27
2809     o fixed calc_isoslopes() to so that cancellation of terms in tensor
2810       formulation works properly with variable resolution.
2811     o restructured the calling tree between the_model_main() and dynamics()
2812     o split initialise() into initialise_fixed() and initialise_varia()
2813     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
2814       in new routine ini_psurf()
2815    
2816    checkpoint26
2817     o moved some #ifdef in optional routines to encompass everything
2818       except the argument declarations. This was using up some memory.
2819     o fixed macros like _ADT to work with both versions of Linux cpp
2820     o cleaned up some unused and uninitialized variables
2821       (helps when debugging with strict compile options)
2822     o split up CPP_EEOPTIONS.h into options and macros
2823       (macros are now in eesupp/inc/CPP_EEMACROS.h)
2824     o patch for 2 processor JAM mode
2825    
2826    checkpoint25
2827     o updates for OBCs and NH
2828     o dramatically reduced memory usage
2829     o added "JAM" routines for use on Artic network
2830     o parameterization of convection by implicit vertical diffusion
2831     o added a diagnostic of convective index
2832     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
2833       (this is was partly for OBCs and NH but also in anticipation of
2834        an explicit free-surface option)
2835     o initial state input files for U and V
2836    
2837    checkpoint24
2838     o Removed some spurious "REAL"s
2839     o Updated KPP to latest version from JPL
2840     o Added a COS(latitude) in horizontal viscosity
2841    
2842    checkpoint23
2843     o Added del^4 diffusion for salt and temperature
2844     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2845    
2846    checkpoint22
2847     o Made many small changes: implicit none, format(i5), etc...
2848     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2849    
2850    checkpoint21
2851     o Introduced new I/O package that supports direct-access records (mdsio.F)
2852     o Split-up mid-level I/O routines
2853     o Updated input data for experiments 0,1,2,4 and 5
2854     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2855    
2856    checkpoint20
2857     o Tidied up open-boundaries some more
2858     o Added non-hydrostatic code
2859     o Fixed some input data
2860     o Modified MPI start-up to work in "coupled" context.
2861    
2862    checkpoint19
2863     o Tidied up directory structure for verification experiments.
2864     o Added new code for open boundaries.
2865     o Corrected advective terms near boundaries.
2866     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2867     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2868     o Split default parameters out of ini_parms.F into set_defaults.F.
2869    
2870    checkpoint18
2871     o Further changes for optional code generation with
2872       CPP - ugh!
2873    
2874    checkpoint17
2875     o Beginning to incorporating modularity
2876       for supporting atmos. and ocean configs.
2877     o Small changes for TAMC complinace
2878     o New ultra simple test case. Barotropic box
2879       configuration "exp0".
2880    
2881    checkpoint16
2882     o Minor changes to exchange routines to support
2883       accumulation in reverse mode. Adjoint of an
2884       assignment is an addition.
2885     o Changes to support compilation by TAMC (LR(1)
2886       syntax) and by g77 under Linux ( 72 character
2887       limit ).
2888    
2889  checkpoint15  checkpoint15
2890   Rewrote exchange routines to allow   Rewrote exchange routines to allow
2891   o General tile <-> tile connectivity.   o General tile <-> tile connectivity.

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