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revision 1.75 by jmc, Thu Jun 20 23:52:03 2002 UTC revision 1.678 by jmc, Wed Jun 14 18:14:14 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    checkpoint58i_post
8    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
9      on wind stress (SEAICEstressFactor defaults to 1.)
10    o Total number of Timers is finite (<=40): comment out 2 non-essential one
11      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
12    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
13      on CS-grid: no longer loosing mass.
14    o exf & curvilinear-grid: no longer modify longitude xC & xG.
15    o pkg/ggl90: fix sloppy output and fix a bug
16    o pkg/seaice: added SEAICEuseEVPpickup parameter
17      - Set to false in order to start EVP solver with
18        non-EVP pickup files when using SEAICEuseEVP
19      - fix sign error in diffusion in seaice_calc_rhs
20    
21    checkpoint58h_post
22    * Modifications for bottom topography control
23      o replace hFacC by _hFacC at various places
24      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
25      o add non-self-adjoint cg2d_nsa
26      o update autodiff support routines
27      o re-initialise hfac after ctrl_depth_ini
28      o works for 5x5 box, doesnt work for global_ocean.90x40x15
29    * Adding verification for 5x5 box (4-layer) bottom topography control
30    
31    checkpoint58g_post
32    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
33       used for mean seasonal cycle, mean diurnal cycle); add an example
34       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
35    o pkg/ggl90:
36      - add parameter (minimum surface kinetic energy)
37      - fix bug (avoiding division by zero)
38    o couple pkg/thsice to pkg/seaice:
39      - modify advection in seaice to accomodate new scalar fields to be advected
40      - only muliDimAdection scheme work with seaice/thsice
41      - mapping of thsice-variables to seaice-variables, back and forth
42      - does not break the verification experiments, but does not give the
43        desired results either
44    o pkg/seaice
45      - make (default) second order advection a bit less confusing?
46    
47    checkpoint58f_post
48    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
49      to pkg/seaice):
50      - new routines thsice_map_exf and thsice_get_exf provide the interface
51      - add an additional formal parameter to thsice_solve4temp
52    o pkg/exf:
53      - add new fields wspeed, snowprecip (to be able to couple to thsice)
54      - correct Stefan-Boltzmann constant
55      - new parameter for longwave surface emittance
56      - separate some stuff from exf_bulkformulae into new routines  
57        exf_radiation, exf_wind
58      - add new parameters and constants: longwave emissivity for ocean, ice
59        and snow, evaporation parameters over ice
60      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
61        either wind from stress or stress from wind
62    o pkg/thSIce:
63    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
64    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
65       and THSICE_CALC_THICKN
66    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
67    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
68      to make debugging easier.
69    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
70    o pkg/bulk_force:
71      - clean-up comments and parameters ;
72      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
73    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
74      generate new output for test-experiment: aim.5l_cs.thSI
75    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
76      testreport accordingly
77    
78    checkpoint58e_post
79    o SEAICE_CGRID adjoint done
80    o R_STAR adjoint implemented.
81      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
82      * need to sort out init. of h0facc, etc.
83    o Make pkg/profile fully independent of ecco,cost, etc. stuff
84      to be able to use it in pure forward.
85    
86    checkpoint58d_post
87    o upgrade simple test-experiment to tutorial example:
88     step.1: duplicate the experiment and (step.2) will remove the old copy.
89      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
90      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
91      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
92      tutorial_global_oce_biogeo    <- copy of dic_example
93      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
94      tutorial_plume_on_slope       <- copy of plume_on_slope
95      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
96      tutorial_global_oce_optim     <- empty for now (David ?)
97      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
98     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
99    o correct a sign problem in cost_scat.F
100    o obcs and ptracers: fix boundary conditions for advections schemes
101      with larger stencil
102    o thsice adjoint: start
103    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
104      completeness
105    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
106      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
107    o ptracers adjoint:
108      * avoid extensive recomputatations
109      * fix missing re-init. of gptr (missed by TAF)
110    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
111      me to turn off the excessive output to STDOUT that this package produces
112    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
113      and add those terms in Vector-Invariant formulation.
114    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
115      if the control period (xx_hfluxperiod etc) is 0
116    o in profiles pkg, clean routines and fix details
117    o in ecco pkg, reading ssh data:
118      fix problem in case the model does not start at iter0=0
119    o fix mnc-pickup/restart for ptracers
120    o new package prifiles:
121      code to compute profile-based cost by Gael Forget
122      (modifs in ecco, ctrl, autodiff)
123    o Benign bug fix in initialization (spotted by M. Mazloff) of
124      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
125    
126    checkpoint58c_post
127    o adjoint: finish NLFS adjoint and provide reference output in
128      verification/global_ocean.90x40x15/results_ad_nlfs
129    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
130      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
131      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
132      with SEAICE_CGRID defined.
133    o move calendarDumps from "data" to "data.cal" and clean-up the code
134      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
135    o add useEXF & useCAL flags (for now, set in hard-coded way)
136    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
137      (were missing in NH mode, and wrong in quasihydrostatic mode).
138      waiting for Chris updated version of calc_gw to add those CALLs.
139    o fix bug in quasihydrostatic S/R ;
140      add a test for this option: global_ocean.90x40x15.qshyd
141    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
142      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
143    o add on/off flag useOffLine for package OFFLINE
144    o seaice:
145      - modify advection so that it works also on the C-grid
146      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
147        problem in multi-tile runs with C-grid
148      - add flags for clipping ice velocities and/or masking solver forcing
149      - fix drag (ocean on ice) formulation and a bug that caused noise in the
150        C-grid solver
151      - added a few comments to seaice_diffusion.F
152      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
153        are now exclusive)
154      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
155        required re-ordering the code a little:
156       + make DAIRN global variable (defined in SEAICE)
157       + move computation of the viscosities eta and zeta into a new separate
158         routine (because I need to recompute them in seaice_ocean_stress.F)
159    
160    checkpoint58b_post
161    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
162      update output.txt of exp. aim.5l_cs.thSI
163    o various mnc cleanups and improvements:
164      + shrink lookup tables by factor of ~4
165      + better error reporting when running out of lookup space
166      + able to handle longer path/file names (up to 500 chars)
167    o adjoint:
168      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
169      - TBD: "hidden" mom_vecinv recomp. in dynamics
170    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
171     (allow to differentiate between forcing components using new integer flags:
172      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
173     and add new flag to put Dissipation tendency out of Adams-Bashforth.
174    o ecco
175      - enable trend removal from SSH anomaly obs.
176    o adjoint
177      - a fix for PmEpR when #undef EXACT_CONSERV
178      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
179      - try to fix "hidden" recomp. in forward_step for NLFS
180        (NLFS seems broken sometimes after I checked it in)
181    o seaice:
182     - add c-grid version of the dynamic solver:
183       + three new routines that are the c-grid substitute lsr, dynsolver
184         and ostres
185       + put a few fields that were local to dynsolver into global common
186         blocks, so that I can move the computation of stresses etc into
187         seaice_lsr (saves coding but may break the adjoint).
188     - replace more hardwired parameters by runtime parameters
189     - add ice masks that mask the rhs of the implicit solvers where there
190       is no ice (commented out in seaice_dynsolver, because i am not sure
191       if this works properly), eventually this should replace the clipping
192       of ice velocities in seaice_dynsolver to +/-40cm/s.
193    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
194      include it only where its needed
195    o move balancing of fluxes before the call of external_forcing_surf
196    o seaice:
197      - correct units of turning angles (now they are really in degrees)
198      - move computation of GWATX/Y out of main routine into dynsolver
199      - initialize GWATX/Y in seaice_init
200    o Apply mask on Fresh-Water flux (needed for SSH forcing).
201      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
202    o seaice: add runtime flags for turning angles (default to zero)
203    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
204      and trend from exf forcing and ctrl control adjustments
205    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
206      (since checkpoint57x_post)
207    o change the default rotation period to 86164.s = the Earth rotation
208    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
209      and based on a reference stratification. Tested within hs94.cs-32x32x5.
210    o seaice advection: add code for choosing between the default (2nd order
211      central differences) and multiDim advection schemes provided by
212      pkg/generic_advdiff
213    o seaice:
214      - removed all references to SEAICE_GRID.h fields from
215        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
216        (cubed-sphere configuration will change a little)
217      - grid computations in seaice_init are obsolete now.
218      - cleaned up code a little so that is easier to read (hopefully).
219      - added new (better?) discretizations of default advection and diffusion
220        (turn on with SEAICEuseFluxForm)
221      - replace 1 in 3d global fields by kSurface in growth.F
222      
223    checkpoint58a_post
224    o seaice:
225      - bug fix in advect.F
226    o shelfice:
227      - separate shelfice load anomaly from pload (breaks with time
228        dependent forcing), => introduce constant field shelficeLoadAnomaly.
229        Its default is 0., but it may be computed more cleverly from (unknown)
230        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
231        done offline. A good approximation of the pressure load anomaly is
232        necessary to avoid large initial adjustment processes underneath
233        deep-reaching shelfice.
234      - small fix in ISOMIP shelfice_thermodynamics
235      - add more sophisticated thermodynamics of Hellmer (1989), this is
236        now the default
237      - give a few constants more intuitive names
238    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
239      if bulk formulae are used in long integration (especially EmPmR). Turn
240      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
241      if balancePrintMean, the imbalance that is substracted is printed to
242      STDOUT.
243    o fix bug (typo) in obcs_apply_eta.F
244    o add a new package shelfice which enables us to model the circulation
245      underneath shelf-ice with draughts of hundreds of meters.
246     - works
247     - to do: + include improved thermodynamics
248              + check whether kSurfC (from model/inc/SURFACE.h) can be used
249                instead of new field kTopC
250              + can we use topoFile, Ro_surf and existing code in ini_depth.F
251                instead of new field R_shelfIce and new code in ini_depth.F
252                and ini_mask_etc.F?
253              + adjust vertical mixing schemes?
254    o seaice pkg:
255     - add a cpp-flag to include a simple formula for a salinity dependent
256       freezing point of sea water at the surface
257     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
258       meridional stresses are now different (and hopefully correct)
259    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
260       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
261       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
262    o pkg/diagnostics: add options and parameters for regional-statistics
263       diagnostics ; define regions by reading a region-mask from a file
264       (might add other options later)
265    o pkg/bulk_force:
266     - add option and parameters to use AIM surface-flux formulae.
267     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
268       others forcing fields (defined in PARM05, parameter file "data") are loaded
269       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
270     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
271     - use the right EXCH call for uwind,vwind (to work on CS-grid).
272     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
273       and parameters (note: calcWindStress replaces .NOT.readwindstress).
274     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
275    
276    checkpoint58
277    o add "--embed-source" option to genmake2 which, when the supporting
278      tools can be compiled (as determined by genmake2) will turn on the
279      embed_files package which then embeds the entire MITgcm source code
280      (*.[fFhc] + Makefile) used for the build within the executable
281      - requested by CNH but off by default
282      - adds a paltry <9MB to the mitgcmuv executable in most cases
283      - only writes the output when useEMBEDSRC in eedata is true
284    o clean up 3-dim. relaxation codes:
285      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
286      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
287      * Thanks to Tom Haine for testing!
288    
289    checkpoint57z_post
290    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
291      affects output (@ truncation level) of exp. plume_on_slope ; updated.
292    o fix the pickup behavior for obcs in combination with ptracers
293    o fix a bug in ptracers_external_fields_load
294    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
295      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
296    o transfered surface NH pressure to eta field (if exactConserv).
297    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
298         and update lab_sea output.txt file.
299    o completing 3-dim. relaxation code: additional term
300         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
301      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
302      * At compile time, in "EXF_OPTIONS.h" set
303          #define  ALLOW_CLIMTEMP_RELAXATION
304          #define  ALLOW_CLIMSALT_RELAXATION
305      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
306          tauThetaClimRelax3Dim = 15552000.0,
307          tauSaltClimRelax3Dim  = 15552000.0,
308      * 3 cases:
309          1) Use a constant-in-time 3-dim. field
310          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
311          3) Real-time relax. to time-evolving prescribed field
312    o Adding Laplacian-type smoothness constraint on
313      initial and boundary (forcing) controls (ic, bc)
314      * enable at compile-time via
315        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
316      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
317      * Absolute scale somewhat unclear so far
318      * no area weighting was included since no other cost term does so far
319    
320    checkpoint57y_post
321    First step for a NLFS adjoint
322    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
323    o new init. routines for calc_r_star, calc_surf_dr
324    o still need to deal with ini_masks_etc
325    o testreport seemed happy
326    checkpoint57y_pre
327    
328    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
329    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
330    o add new offset feature to offline pkg (plus minor cleanup)
331    o cfc fixes for final year of integration
332    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
333      be in GCHEM_OPTIONS).
334    
335    checkpoint57x_post
336    o fix testreport Pb in multiple test experiment.
337    o cleanup our namelist syntax in verification:
338      - make it more F95 standards compliant (some work still needed)
339      - allows the vast majority of our tests to work with gfortran
340    o Non-Hydrostatic:
341     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
342     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
343    o Allow to apply AB on T,S rather than on AB(gT,gS):
344     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
345     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
346       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
347     - need a "clever" read_pickup to restart from the other AB formulation
348    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
349    o remove some unused variables (reduces number of compiler warnings)
350    o adjoint
351      * Disable useVariableViscosity for adjoint for time being
352        (there are a number of extensive recomputations)
353      * Initialize certain variables needed for adjoint
354    
355    checkpoint57w_post
356    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
357                 fix the singleCpuIO RS version of MDSWRITEFIELD
358       and add a WARNING if using globalFiles=T with multi-processors.
359    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
360      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
361    o tracer advection scheme:
362      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
363       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
364       was not very convenient).
365      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
366       (further tests needed for the implicit DST & Flux-Limiter schemes).
367    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
368      and sRef for convenience, handy, when you want to initialize
369      ptracers in a large domain with a constant non-zero value. Also,
370      untangle ptracers_init.F a little.
371    
372    checkpoint57v_post
373    o change dome exp. to use variable viscosity in side-drag terms.
374    o remove all the files from the cfc_offline test since they are now
375      incorporated into tutorial_cfc_offline which has been producing
376      identical results for a few days of testing
377    o add new parameter: sideDragFactor to enable half-slip-side BC
378      and change side-drag S/R to use viscosity from mom_calc_visc
379      (can switch back by setting sideDragFactor=0.); affects results at
380      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
381       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
382    o vorticity & strain are now computed without masking, to account for
383      no-slip-side BC in variable viscosity calculation ; mask is applied
384      anyway later on, before computing advection/coriolis terms.
385    o modify exp4 to test new obcs support for reading from external files
386      and for passive tracers
387    o fix behavior of ptracers_monitor when monitor output is written to a
388      netcdf-file; still not independent of monitor.F (writes in the same
389      file).
390    o change default value of tRef (put a uniform, meaningful value for ocean
391      & atmos) and initialize sRef (was missing, as Martin mentioned).
392    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
393      to be proportional to enstrophy dissipation length.  Thus,
394       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
395      This is now consistent with Smagorinsky and with the manual.
396    
397    checkpoint57u_post
398    o OBCS and PTRACERS: add open boundary support for passive tracers
399      - either use homogenous (pseudo) v.Neumann conditions or prescribe
400        OB-values from file; this is not different from the way theta and salinity
401        are treated
402      - however, Orlanski-radiation conditions are not supported, and the model
403        will stop if you use pTracers and Orlanski at the same time.
404      - beefed up the rountine obcs_external_fields_load: now only those open
405        boundary values are overwritten with values from files for which there
406        are really files, otherwise the OB-fields remain untouched. This makes
407        it possible to use different OBs at different ends of the domain (as
408        with EXF)
409    o reduce number of exch calls in shap_filt (s2).
410    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
411      truncation level) 4/5 MLAdjust test results (11&12 digits match).
412    
413    checkpoint57t_post
414    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
415    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
416      same truncation, independent of the face number: affects affects several
417      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
418    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
419      note that biharmonic viscosity + no-slip was not tested in any experiment.
420    o fix bug in non-linear free-surf side-drag ; generate new output for
421      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
422    o make mnc honor the writeBinaryPrec flag for most kinds of output
423    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
424    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
425      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
426    o add brackets in multi-terms sum to get same truncation, independent of
427      the face number (manage to get exactly same value of gU,gV at the cs-edge)
428      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
429    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
430      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
431      a maximum grid-scale Reynolds number.  Also, changes all length calculations
432      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
433      Suggested values of viscosity parameters found in mom_calc_visc.
434      Many new viscosity diagnostics available.
435    
436    checkpoint57s_post
437    o Add clearing-house for viscosity calculations, mom_calc_visc and
438      correct numerous bugs in LeithD and Smagorinsky discretizations.  
439      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
440      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
441      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
442      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
443      The Strain-Tension form is now called with useStrainTensonVisc=.true.
444      ViscAhStrain and viscAhTension are now retired.
445    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
446    o In response to JMC's bug report, genmake2 now ignores any soft-links
447      that it finds in the *current* directory when searching for files.
448      Soft-links found in any other source directories will still work as
449      they did before.
450    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
451      a C routine to unlimit the stack size
452    o mnc-ify pkg/aim snapshot vars
453    o mnc-ify pkg/land as requested by Daniel
454    o various changes to mnc including:
455      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
456      - output can now be grouped so that all files within a group
457          change the ITER portion of their names in lock-step together
458      - can now read ("global") PER-FACE (in addition to PER-TILE) files
459          and works with both EXCH1 and EXCH2 (but needs more testing)
460      - writing works for all verification test cases w/ g77 on Linux
461    
462    checkpoint57r_post
463    o make MNC variable initialization happen earlier
464    o add diagnostics for (almost) each term of the momentum Eq.
465    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
466    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
467    o remove MINIMAL_TAVE_OUTPUT option ;
468      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
469    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
470      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
471    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
472    o add time-dependent SST, SSS control
473    o cost terms in ecco/ modularized (new cost_generic.F)
474    o cost_averages routines are modularized (new cost_averagesgeneric.F)
475    o new infrastructure for seaice model vs. obs misfits in seaice/
476      * driver from the_main_loop.F is seaice_cost_driver.F
477      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
478      * gradient check in Exp. 6a of natl_box_adjoint/
479    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
480      (see README file)
481    
482    checkpoint57q_post
483    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
484    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
485      - bug was reported by Jean-Michel and Ian Fenty
486    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
487      update exp. cpl_aim+ocn output.
488    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
489      Needed for high-res. runs with large global files
490      to be able to limit tapelev size
491    o Changed some tests for adjoint:
492      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
493      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
494      * global_ocean.90x40x15/ back to default 3-level checkpointing
495    o Modifications to enable scripted COMMON to MODULE conversion
496      * verification/OpenAD/code/ has necessary scripts and description;
497      * converts, compiles and runs successfully;
498    
499    checkpoint57p_post
500    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
501    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
502      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
503    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
504    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
505      (was already the case for dissipation with mom_vecinv,
506       and also the case for grad.PhiHyd when staggered-timeStep)
507      This will allow to put dissipation out-off the AB time-stepping.
508     Unfortunately, affects truncation error. Update output of exp. that "fails"
509      (cg2d matching number) and leave the others for later: front_relax(10),
510      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
511      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
512    
513    checkpoint57o_post
514    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
515      (2) its ready to be documented during the 20050801 DocFest
516    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
517      for ideal_2D_oce and lab_sea on linux_ia32_g77
518    o set to #undef CTRL_SET_OLD_MAXCVARS_30
519      in global1x1_tot/code_seaice_adj to access indices 32, 33
520      (worth another tag)
521    
522    checkpoint57n_post
523    o adding precip control xx_precip 32
524    o adding swflux control xx_swflux 33
525    o Replacing 10 forcing penalty cost routines by 1 generic.
526    o Implementing partitioning in time-mean and variable adjustment
527      for atmos. state.
528    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
529    o in natl_box_adjoint:
530      * updated exp 1 to 10
531        (but does not have time-mean vs. variable split results yet)
532    o updated global1x1/*_seaice_adj/
533      to incorporate latest changes
534    o enable useSingleCpuIO for mdsio vector routines
535      (applies in particular to tapelev I/O)
536    o removed inefficient K-loop in all active_file*control*.F
537    
538    checkpoint57m_post
539    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
540      and advect_cs (use EXCH-2 and standard cs-32 grid files).
541    o pkg/exch2: filling of face-corner halo regions is optional
542      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
543    
544    checkpoint57l_post
545     tag before updating tutorials (pre-release-2)
546    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
547       for output and interpolation of input fields onto model grid)
548    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
549       Affects results of exp. rotating_tank ; update output.txt.
550    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
551          and taking the square quantity and/or using a fraction-weight field.
552    o fix aim_diagnostics_init.F mate numbers.
553    o add mnc output capability to diagnostics/diagstat and update
554      our cvsignore files for the ACSII output generated
555    
556    checkpoint57k_post
557    o lab_sea now uses diagnostics package and provides a suite of
558      new EXF diagnostics output.
559    
560    checkpoint57j_post
561    o exf
562      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
563        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
564        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
565      * extended diagnostics output
566        - now includes all EXF variables
567        - hs, hl moved to common block
568        - separate S/R for diagnostics, called after ctrl vector is added
569        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
570        - EXFqnet contains true Qnet (i.e. includes qsw)
571      * updated verif. lab_sea, global_with_exf
572      * Rearranging hflux (exf_mapfields -> exf_getforcing)
573        to ensure that diagnostics sees a true EXFqnet
574    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
575    o diagnostics pkg: change pointers so that 1 diagnostic can be used
576      several times with different frequencies.
577    o mnc-ify the thsice package as requested by Daniel Enderton
578      - the monitor--MNC output needs work
579      - many attributes need to be added (most are currently blank)
580    o mnc-ify theaim_v23 package as requested by Daniel Enderton
581      - many attributes need to be added (most are currently blank)
582    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
583    o add Sadourny like discretization to the 4th.O vorticity advection scheme
584    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
585      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
586         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
587    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
588     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
589    
590    checkpoint57i_post
591    o Diagnostics package was changed: diagnostic allocation is now deactivated
592      by setting an empty file name in the namelist (used to be by setting 0 frequency)
593    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
594      add 1rst Order upwind vertical Shear.
595    o add a quick fix for A/B checkpointing in OFFLINE mode
596    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
597      end-run around the C/Fortran linking horror in eesup/src/timers.F
598    o added pkg/runclock: allows user to terminate run based on wall clock
599    o added non-hydrostatic scaling parameter: nh_am2
600    o pkg/my82: futile attempt to make results compiler-independent by adding
601      some "_d 0", etc. no effect.
602    o for mnc output, fill the 'T' coordinate var with myTime and create a
603      separate 'iter' variable for iteration count
604    o pkg/diagnostics:
605      add new capability: output of Global/Regional & per-level statistics ;
606      tested against monitor output (including land & thSIce) on various exp.
607    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
608    
609    checkpoint57h_done
610      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
611      data.diagnostics, data.gchem, data.ptracers) is done.
612    
613    o pkg/diagnostics: prepare for Global/Regional statistics.
614      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
615    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
616      and rename it: DIFFERENT_MULTIPLE
617    
618    checkpoint57h_post
619    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
620    o pkg/diagnostics: change output frequency, now in seconds (instead
621      of Nb of iterations). This requires to change data.diagnostics.
622    checkpoint57h_pre
623    
624    o in mnc, let the user create the output dir if both mnc_outdir_date
625      and mnc_outdir_num are false
626    o add fflags() to pkg/diagnostics which allows one to specify, on a
627      per-file basis, the file precision [default behavior is unchanged]
628    o added diagnostics to pkg/kpp, including computation of mixed layer
629      depth based on a temperature/density criterion
630    o updated verification/natl_box to test the new pkg/kpp diagnostics
631    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
632    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
633    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
634      not mnc -- this mistake was found by JMC and is now corrected
635    
636    checkpoint57g_post
637    o add Adams-Bashforth 3rd Order time stepping:
638      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
639      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
640    checkpoint57g_pre
641    
642    o make lambda[Theta,Salt]ClimRelax spatially varying
643      (default remains spatially uniform constant based on tau)
644    o added new control variables
645      * init. uVel, vVel, etanN
646      * lambda[Theta,Salt]ClimRelax
647    o separate masks used for ctrl_pack/unpack 'from write_grid' output
648      (suggested by G. Forget)
649    
650    checkpoint57f_post
651    o add parameter "baseTime" = model base time = time at iteration zero
652      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
653      account for baseTime shift
654    o move Coriolis arrays from PARAMS.h to GRID.h
655    checkpoint57f_pre
656    
657    o mnc-ifying the seaice package
658    o introduced an alternative length scale calculation for use in the limiting
659      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
660    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
661    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
662      as well as grad(vort3).  Made it compatible with both approximate form
663      for the cubed sphere and full form of these gradients.  Added flag
664      useFullLeith to select between approximate and full form.  
665    o add "d0" in getcon.F to reduce differences between compilers/platforms
666      update output.txt of exp. fizhi-gridalt-hs
667    o change port_rand funtion to allow to set the seed.
668    o fix obscure MNC bug involving conversion between reals and integers
669      - it caused no problems with certain (eg. gcc, ifc) compilers but the
670        new version is now more standards-compliant
671    o adjoint-related modifications
672      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
673      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
674      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
675    
676    checkpoint57e_post
677    o Adding eddy stress controls a la Ferreira et al.
678    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
679    
680    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
681      update output.txt of exp. fizhi-gridalt-hs
682    o add more "Z" dimensions and associated coordinate vars to MNC
683    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
684    o parameter calendarDumps: when set, approximate months (30-31 days) and years
685      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
686      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
687      months and years.  Requires pkg/cal.
688    o diagnostics: add pickup functionality
689      - off by default for backwards compatibility
690      - current version only uses MDSIO -- MNC will be added
691    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
692    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
693    
694    checkpoint57d_post
695    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
696    o modify verification/ideal_2D_oce so that it tests the creation of mnc
697      output from the diagnostics package
698    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
699    o make genmake2 more portable by using ".$FS" instead of ".f" for more
700      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
701    o add coordinate variables to the MNC output from the diagnostics package
702    o change MNC-flags default value: true when useMNC=TRUE
703    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
704      the ability (off by default) to read the grid information using MNC
705    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
706    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
707    o do snap-shot diagnostics at the middle of the time-interval (instead of
708      at the end).
709    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
710      new test for AIM with thSIce + slab-ocean
711    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
712    o move state variable diagnostics to the beginning of the time step ;
713      (note: still needs some work specially for snap-shot diagnostics)
714      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
715    
716    checkpoint57c_post
717    o Change testing option (-ieee) to get closer agreement between g77 & ifort
718    o generate new output.txt files on faulks with g77 & the new -ieee option
719    checkpoint57c_pre
720    
721    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
722      update output.txt of exp. global_ocean.90x40x15
723    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
724      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
725    o add saltFlux(+File) forcing capability with periodicExternalForcing
726    o allow to use pkg diagnostics for GM-Redi & ThSIce output
727    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
728    o improvements for the MNC output from DIAGNOSTICS:
729      - correct handling of the unlimitied dimension
730      - all dims now have associated coordinate variables
731      - variables located at U, V, and Corner ("Z") points are now written
732        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
733        *all* data points are output
734    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
735    o added pkg/seaice/seaice_monitor.F
736    o mdsio_readfield.F can now read files visible only to master MPI process.
737    o pkg/seaice: some test code for ice-modified ocean stress
738    o exf_getffields interpolation defaults to bilinear for all scalar forcing
739      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
740      spurious negative numbers for precipitation and humidity.  Will cause
741      some small numerical differences for integrations using pkg/exf/exf_interp.F.
742    o pkg/ctrl/
743      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
744        May be enabled via doPackDiag
745      *  introduce z-scaling of
746         + gradient (doZscalePack) and
747         + control (doZscaleUnpack)
748    o pkg/mdsio/
749      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
750      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
751    
752    checkpoint57b_post
753    o simplify options in diagnostics_fill arguments (remove weird combinations)
754    o fix MNC coordinate variables so that they now contain per-face index
755      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
756      general, EXCH2 grids are only aligned to a "local" coordinate system
757    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
758    o Implement instantaneous output within pkg diagnostics:
759      setting a negative frequency in data.diagnostics produces
760     "snap-shot" output (as opposed to time-average if freq > 0)
761    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
762      NOTE: change ptracer diagnostics name: use 2 characters to work with
763            more than 9 tracers. Add also diagnostics of advect & diffus flux.
764    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
765      becomes the coordinate variable for the 'T' dimension
766    o add CF-style coordinate variables to MNC
767      - just a first cut:  numbers are meaningless on the cubesphere and
768        missing along the T axis but otherwise it works!
769    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
770    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
771    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
772      this is based directly on what the model compute, so that the content of
773      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
774    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
775    o clean up build options files for SunOS, in particular
776      - remove -traditional from xmakedepend
777      - change -xarch=v9 to -xarch=native for f77
778      - restore use of make (not gmake)
779      - add CC=gcc if using g77
780    o changes per discussion of AM, JMC, & EH3 today:
781      - move redundant "grid" variables out of "state" -- in preparation of
782        creating proper CF-style coordinate variables and in recognition
783        that any/all grid variables can be easily copied (eg. w/NCO) from
784        the grid files into any of the other NetCDF files
785      - *always* output grid variables with MDSIO (this will eventually be
786        changed)
787      - output MNC grid file if useMNC is true
788    o every instance of _END_MASTER() has been found and replaced with
789      _END_MASTER( myThid ) in order to satisfy certain picky Sun
790      preprocessors
791    o re-arrange diagnostics pkg initialisation:
792     - allow each package to extend the available diagnostics list
793     - add some checking and fix small problems (multi-threaded, ...)
794     - new S/R diagnostics_fill (replace fill_diagnostics):
795       look through the short list of active diag. (instead of the long list)
796       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
797    
798    checkpoint57a_post
799    o this set of changes restores TAMC compatibility
800      tested for global_ocean.90x40x15 adjoint on trough
801      (what a pain)
802    
803    checkpoint57a_pre
804    o some modifs in tools/build_options for sunos
805    o call ctrl_pack for ctrl at end for optimcycle=0
806    
807    checkpoint57
808    o add horizontal bi-harmonic viscosity for vertical velocity
809      - new parameter viscA4W (defaults to viscA4)
810      - affects only non-hydrostatic code
811      - to be done: no-slip lateral boundary conditions
812    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
813    o implement Implicit Vertical advection for pTracers
814    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
815      (implemented also for implicit vertical diffusion & advection)
816    o OBCS: extend application of tracer open boundary conditions
817      to a strip beyond the boundary of width Olx/Oly
818    o add call monitor to TAF set of required calls (flow directives)
819      and include in natl_box_adjoint
820    o untangle a few ifdefs related to cost, ctrl, autodiff
821      untangel a few ALLOW_ECCO_OPTIMIZATION
822    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
823      (theta2, salt2 in ecco_cost_weights)
824    
825    checkpoint56c_post
826    o OBCS as control variables
827      - update ctrl_ad_diff.list, obcs_ad_diff.list
828      - remove balance of obcs controls from default
829      - fix index bug nobcs in ctrl_init
830      - fix dummy fields filen in ctrl_pack
831      - add dummy weights for obcs
832    o lsopt: comment out fort.94 output
833    o optim:
834      - remove unnecessary header files
835      - adjusted namelists
836      - add xerbla.F to Makefile
837    o exf:
838      - multiple modifications of exf_check_range
839      - unit change in exf_init_runoff from [m/year] to [m/s]
840    o mdsio:
841      - i/o-vector change debugLevel from debLevA to debLevB
842    
843    checkpoint56b_post
844    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
845      is called from DO_THE_MODEL_IO
846      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
847      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
848      - clean up PTRACERS_WRITE_TIMEAVE a little
849    o add another verification experiment that tests both the cfc-pkg and
850      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
851      reactive tendencies treated inline with regular timestepping
852    o testreport previously did a lousy job of comparing small numbers, so
853      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
854      implemented in the little c-progam tmp_cmpnum.c which is embedded in
855      testreport.
856    o ptracers_monitor: bug fix for MPI
857    
858    checkpoint56a_post
859    o GCHEM: finish reorganizating the package
860      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
861        (introduces another 3D-array for each passive tracer, but only if
862        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
863        gchemTendency is not needed because the timestep is done separately)
864      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
865      - GCHEM is now---more or less cleanly---separate from PTRACERS
866      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
867        so clear to me how that should be done in a general way.
868    o CFC: improve formatting of output in CFC_ATMOS
869    o PTRACERS:
870      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
871        that ALL experiments with ptracers enable can be checked. This makes
872        GCHEM_MONITOR obsolete.
873      - include a runtime parameter PTRACERS_monitorFreq that defaults to
874        monitorFreq
875      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
876    o add PTRACERS (PTR0[1-5]) to testreport output
877    o exf_check_range:
878      * default changed to .TRUE.
879      * will check values for niter0 if debLevA, every timestep if debLevB
880      * STOP in exf_check_range if 'out of range'
881      * range chosen generous to allow for potential extema
882      TBD: a version with stricter range
883           permitted range would be runtime parameters
884    o GMredi:
885      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
886      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
887      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
888    o GCHEM:
889      - move call to GCHEM_FORCING_SEP, so that it is now called before
890        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
891      - introduced a useGCHEM runtime flag and applied it everywhere.
892      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
893        this flag is now only visible within GCHEM-pkg routines.
894      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
895        be replaced by a 3D array that is computed before thermodynamics; for
896        this, the tracer ID iTracer had to be included into the parameter list
897        of ptracers_forcing
898      - set up forward_step to call gchem_forcing, that will replace
899        gchem_forcing_int in ptracers_forcing
900      - cleaning up
901    o small cleaning of exch2: remove files that are also in eesupp/src
902    
903    checkpoint56
904    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
905    o mnc: cleanup "full" files--fixes out-of-memory problem
906    o ECCO-GODAE
907      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
908      * fully merged and updated from SIO code
909        windstress sign change affects
910        - exf_inscal_[u/v]stress
911        - sign of xx_tau[u/v] adjustments
912        - signs in cost_scat
913      * ctrl_get_gen: avoid update of tau[u/v] for first few days
914      * natl_box_adjoint updated and compressed
915      * 2-level checkpoint switch added
916        (tested in EXP. 1 of natl_box_adjoint)
917      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
918    o SVD
919      * first complete, non-hacked version for SVD calculations
920      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
921        performed via direct access files admtlm_vector.it????
922        (via ctrl_[un]pack)
923      * optimcycle is used for ARPACK iteration counter
924        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
925      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
926        and add linear transforms where necessary
927      * controls are initial/final SST, SSS (can be extended; need to check
928        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
929    o mdsio: filename info to both stderr, stdout
930    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
931      from sign change
932    
933    checkpoint55j_post
934    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
935      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
936    o add consistent build directories and .cvsignore files to verification
937    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
938    o make all subroutines 30 or less characters in length for certain older
939      compilers to work (a thorough search only turns up two routines in
940      pkg/ptracers)
941    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
942      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
943    
944    checkpoint55i_post
945    o change arrays for total vertical diffusivity (2.D if explicit,
946      3.D if implicit) ; each ptracer uses its own background value.
947    o added mnc/NetCDF output capability to ocn_compon_interf
948      - added bits to verification/cpl_aim+ocn so that it can run on
949        ITRDA and other clusters without the mpirun "-wd" option
950    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
951      configuration
952    o give MNC the ability to create additional files rather than
953      exceeding a specified file size limit "MNC_MAX_FILESIZE"
954      - the default is just less than 2GB which is a practical limit
955        on many systems
956    o Compute the non-local term using either KPP vertical diffusivity (=default)
957       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
958    
959    checkpoint55h_post
960    o add verification test "vermix"
961    o remove all the *_ioinc flags and replace with the single global
962      outputTypesInclusive flag
963    o allow to set a vertical profile of vertical diffusivity for T & S
964    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
965    o useMNC moved from data.mnc to data.pkg
966    
967    checkpoint55g_post
968    o Renaming carbon AD experiments to comply with testreport conventions
969    o Updating adjoint of Held-Suarez hs94.1x64x5
970    o Fixing directives for non-ECCO forward_step, after ECCO directives
971      have been fixed to avoid recomp. of do_oceanic_phys
972      Works well for global_ocean.90x40x15,
973      but recomp. issue remains for carbon
974    o Updating adjoint output for natl_box_adjoint after
975      pkg/ecco has been modified (see taga c55d_post)
976    
977    checkpoint55f_post
978    o rename to timeave_init_fixed
979    
980    checkpoint55e_post
981    o some delicate re-shuffle of store directives to avoid one
982      extra call of do_oceanic_physics
983      affects ecco_the_main_loop.F, do_oceanic_physics.F
984      checkpoint_lev1_directives.h
985    o NB: this may break global_ocean adjoint temporarily,
986      but it is clear how to fix it. Will do later, need this now.
987    
988    checkpoint55d_post
989    o ECCO specific cost function terms (up-to-date with 1x1 runs)
990    o ecco_cost_weights is modified to 1x1 runs
991    o modifs to allow observations to be read in as
992      single file or yearly files
993    o enable to read exf forcing fields as either
994      single file or yearly files (flag useExfYearlyFields)
995    checkpoint55d_pre
996    
997    o switch between 2-level and 3-level checkpointing
998    o add ability of MNC to write local and "partial" (eg. 2D slices where
999      the full 3D field is never actually stored) arrays to NetCDF files
1000      with the correct (that is, the complete multi-dimensional) set of
1001      array indicies
1002      - used in mom_vecinv() to write the diagFreq output
1003      - tested (demonstrated) in verification/aim.5l_cs
1004    o further mnc-ification
1005      - add verification/lab_sea to the list with mnc setups
1006      - fix undefined mnc v-names in cd_code
1007      - add kpp to mnc output (both snapshot and timeave)
1008    o non-hydrostatic code
1009      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1010        in calc_gw.F
1011      - defaults to viscAh
1012      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1013        friction or Leith) in non-hydrostatic mode, as long as there is
1014        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1015    o pkg/cost
1016      extend simple cost functions to treat time mean quantities
1017      (T,U,V) via cost_accumulate_state from cost_tile
1018    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1019        be 2 times larger than the minimum size the advection scheme requires.
1020        now get a perfect conservation of salt in advect_cs test-exp (updated)
1021    o GGL90 (Gaspar's TKE mixed layer)
1022      - add horizontal diffusion of TKE, requires exchanges in
1023        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1024        default. In OPA there is no horizontal diffusion of TKE but the
1025        mixing coefficients are computed from a horizontal average of TKE of
1026        6 points or so. I think that diffusion has a little more physical
1027        justification.
1028      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1029        was in vain)
1030      - mask tke-variable in ggl90_init
1031    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1032    o fix biharmonic diffusion on CS-grid.
1033    o more obcs stuff
1034      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1035        for reading boundary values. This routine is called from
1036        obcs_prescribe_read
1037      - updated obcs_check
1038      - changed sponge layer relaxation parameter units for days to seconds
1039      - turned off sponge layer by default
1040      - changed argument list of OBCS_CALC to myTime+deltaTclock
1041      - fixed about 35 bugs in obcs_external_fields_load
1042    
1043    checkpoint55c_post
1044    o obcs stuff
1045      - new runtime flags useOBCSprescribe, useOBCSbalance
1046      - re-arranged obcs_calc
1047      - moved exf_getobcs to obcs_prescibe_read
1048        obcs_prescibe_read is called after ORLANSKI stuff
1049        and independent of it (executable can contain all).
1050      - updated obcs_check
1051      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1052        These may be necessary only if tangential velocities are
1053        prescribed at OB, not sure, needs testing.
1054    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1055      which simplifies the calls and passes the ifc check-bounds test
1056    
1057    checkpoint55b_post
1058    o add a 2D scalar, Z location, exchange_2 routine.
1059    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1060      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1061      affects advect_cs results (for the wrong reason): update output.txt
1062    o use a more standard discretization for biharmonic viscosity ;
1063     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1064      affects results of dome set-up: update output.txt
1065    o fix gad_advection.F (CubedSphere part), back to version 1.23
1066    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1067    
1068    checkpoint55a_post
1069    o merged code to
1070      * prescribe/read time-dependent open boundaries
1071        (works in conjunction with exf, cal)
1072      * sponge layer code for open boundaries
1073      * each boundary N/S/E/W now has its own CPP option
1074        (healthy for the adjoint)
1075    
1076    checkpoint55
1077    o up-to-date adjoint of previous breaks
1078      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1079      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1080      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1081      - carbon: * remove tr1-related adjoint verification
1082                * add ptracer as control variable
1083    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1084      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1085    
1086    checkpoint54f_post
1087    o in verification/carbin/ remove experiment related to
1088      ALLOW_PASSIVE_TRACER (array tr1 etc)
1089      code_ad/ input_ad/ results_ad
1090    
1091    o add two new packages
1092      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1093        + subject to optimization (memory)
1094      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1095        + subject to reordering (many GOTOs in the original code)
1096        + so far opps is called for every (i,j) point, and then operates in
1097          the vertical; one may want to reorder the scheme in order operate in
1098          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1099          fields)
1100    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1101      - all verification tests compile and run with linux_ia32_g77
1102      - defaults are compatible with current input files--nothing
1103        should change if you were not previously using MNC
1104      - MNC output has been added in numerous places (eg. timeave)
1105        but there are still a few writes not yet do-able with MNC
1106        (this is in progress)
1107      - flags now allow for either/or/both use of MDSIO and MNC and
1108        documentation will soon follow
1109      - numerous small formatting cleanups for ProTeX
1110    o add version info (via BUILD_INFO.h) to MNC and stdout
1111    
1112    checkpoint54e_post
1113    o add two new packages
1114      - pp81 (Packanowski and Philander, 1981), Richardson number and
1115        stratification dependent mixing
1116      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1117      - these scheme operate in a similar manner as KPP (without ghat, of
1118        course), however there is only one diffusivity that is used for both
1119        temperature and salinity (and passive tracers)ç
1120    o add offline package
1121    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1122      provided by Stephanie Dutkiewicz
1123    o genmake2: add ability to search for C compilers and cleanup test output
1124      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1125    
1126    checkpoint54d_post
1127    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1128    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1129      leading to additional shift by 5 days each year of integration
1130       (i.e. leading to considerable offset over the years)
1131    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1132    o start with no AB and no initial filtering (staggerTimeStep):
1133      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1134    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1135      (external loading & cpl import/export stay in forward_step.F)
1136    o update coupling interface to work with new staggerTimeStep
1137    o change MDSIO ptracers_pickup.
1138    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1139    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1140    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1141    
1142    checkpoint54c_post
1143    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1144      this affects (truncation error) output.txt of test-exp:
1145       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1146    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1147    o change Qnet to always be the net heat flux, (+upward).
1148      affects (truncation error) output of natl_box exp.: updated
1149    o define the max number of passive tracers in PTRACERS_SIZE.h
1150    o start to test mnc routinely in exp0
1151    o add sea-ice loading (sIceLoad) as a new forcing field.
1152    
1153    checkpoint54b_post
1154    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1155       impressive on Altix and Opteron systems)
1156    o diagnostics can now write NetCDF files through the mnc package
1157    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1158    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1159    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1160      affects (truncation error) output of lab_sea & natl_box exp.: updated
1161    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1162    
1163    checkpoint54a_post
1164    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1165    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1166    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1167    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1168      + internal_wave (shift in writing cg2d_ini_res)
1169    checkpoint54a_pre
1170    
1171    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1172      - modified verification/lab_sea and natl_box_adjoint accordingly
1173    
1174    checkpoint54
1175    checkpoint53g_post
1176    o prepare splitting of thermodynamics: store convect.counter in common block
1177    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1178      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1179    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1180    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1181    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1182    o restore adjointability
1183    
1184    checkpoint53f_post
1185    o modifications that affect AIM experiment results (update output.txt):
1186      - no advection of S at top interface Nr (pkg/generic_advdiff)
1187      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1188    o AIM pkg:
1189      - include stability function into surf.Flux derivative relative to Tsurf
1190      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1191    
1192    checkpoint53e_post
1193    o merged cylindrical coord configuration
1194    o added rotating_tank experiment
1195    checkpoint53e_pre
1196    
1197    checkpoint53d_post
1198    o faulks upgraded: re-generate output.txt that have changed:
1199       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1200    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1201    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1202    o added Sadourny discretization of Coriolis
1203      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1204      - re-enabled use of omega3 (useAbsVorticity)
1205    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1206      vector-invariant equations
1207      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1208    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1209      hopefully without new bugs
1210      - still to do: biharmonic friction for non-hydrostatic w
1211    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1212    o regenerated output for global_ocean_ebm (using -ieee)
1213    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1214      of mom_common/
1215      - simple re-arrangement of instructions within computing loop
1216    checkpoint53d_pre
1217    
1218    checkpoint53c_post
1219    o new version of coupler for AIM+thSIce and Ocean models
1220     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1221     - land: change Evaporation of snow
1222     - aim with thSIce: fix bug in snow-precip.
1223    o changes to calc_gw.F
1224     - bug fix for w^2 term near the bottom boundary
1225     - (hopefully) improve the lateral slip boundary condtions for use with
1226        partial/looped cells
1227      - because the bug fix changes two verification experiments anyway (exp5
1228        and plume on slope), change the lateral boundary condition from half slip
1229        to the value of no_slip_sides
1230    o ebm package wasnt quite up to the parallel task. Fixed that.
1231    o Adjoint of EBM package + verification
1232      * TLM OK
1233      * ADM not sufficient accuracy yet (needs further testing)
1234    
1235    checkpoint53b_post
1236    o Commiting new energy balance model to repository
1237      * package is pkg/ebm
1238      * verif. is verification/global_ocean_ebm
1239      * references are in ebm_driver.F
1240    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1241    C        Global thermohaline circulation. Part I:
1242    C        Sensitivity to atmospheric moisture transport.
1243    C        J. Climate 12(1), 71-82
1244    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1245    C        Global thermohaline circulation. Part II:
1246    C        Sensitivity with interactive transport.
1247    C        J. Climate 12(1), 83-91
1248    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1249    C        Destabilization of the thermohaline circulation
1250    C        by atmospheric eddy transports.
1251    C        J. Climate 7(12), 1870-1882
1252    o Will need long integration testing.
1253    checkpoint53b_pre
1254    
1255    o created pkg/mom_common in preparation for variable viscosity code
1256    o renamed and split ini_mnc_io
1257    o pkg/land: only liquid water can diffuse or run-off
1258    o AIM using land: soil wetness availability account for snow
1259    o added printMapIncludesZeros to EEPARMS namelist
1260    
1261    checkpoint53a_post
1262    o restore TAMC compatiility for exf_constants.h
1263      (no usage of _d in .h)
1264    o Additional storing in KPP in an attempt to fix
1265      TAMC problem with adjoint of KPP code.
1266      (no success...)
1267      Identical code works fine with TAF.
1268    o Fixed verification/natl_box_adjoint experiments.
1269      Initial conditions for Experiments 4 and 5 are now
1270      set to "SEAICE_initialHEFF=0", which is more reasonable,
1271      and hence gives results closer to that of Experiment 2.
1272      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1273    
1274    checkpoint53
1275    o stable checkpoint with up to date adjoint
1276      TLM tests only run for 1st grdchk at the moment. Its unclear if
1277      this is a code problem or a problem with resetting code for g_
1278      variables that is being autogenerated wrong.
1279      Otherwise:
1280       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1281       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1282         are both still in chaos following their security messes.
1283    
1284    checkpoint52n_post
1285    o various build (mostly genmake2) changes including:
1286      - ability to build/run more easily within Cygwin and MacOS X
1287      - more complicated Makefiles with a stronger dependence on Gnu Make
1288    o pkg/seaice modifications
1289      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1290        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1291        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1292      - changed proxy for geostrophic velocity and updated
1293        verification/lab_sea/results/* accordingly
1294      - removed ADI dynamic solver from pkg/seaice
1295      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1296        they caused a segmentation fault under certain circumstances
1297      - removed unused field WATR
1298    o bug fix in exf-package:
1299      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1300         now reflect that.
1301    o small fixes in the cal-package:
1302      - set reference date to first of January for the 'model'-calendar
1303      - failing of cal_CheckDate in cal_FullDate now actually results in a
1304        warning
1305    o small modifications in exf-package to increase flexibility:
1306      - change climtempfreeze from a constant to a runtime parameter that
1307        is specified in data.exf_clim (default = -1.9)
1308      - introduce runtime parameter windstressmax (default = 2.0) that is
1309        specified in data.exf
1310    o fix in pkg/thsice:
1311      - update Evap (Tsf changes) to be consistent with Latent heat flux
1312      - maintain snow precipitation unchanged (even if Tsf >=0).
1313     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1314    
1315    checkpoint52m_post
1316    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1317      this does not change any of the results, because myIter=0 in swfrac always
1318      lead to jwtype=2 (the default anyway), but the call makes little sense
1319      as a default
1320    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1321    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1322      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1323    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1324    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1325    o extending useSingleCpuIO option to work with new exch2 I/O format
1326      - old-style, missing-tile I/O is still accessible by defining CPP
1327        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1328    o monitor package can write to NetCDF files and/or STDOUT
1329    o fix re-definition bug in MNC_GRID_INIT_ALL()
1330    o doc/api_reference added
1331      - a framework for building an API Reference Manual using all
1332        the "protex" comments embedded in the code
1333      - see pkg/generic_advdiff, pkg/mnc for examples
1334    o MNC:
1335      - make myThid the last argument for all subroutines
1336      - new default for the grid files: NO halos
1337      - add useMNC and other run-time flags
1338      - separate per-file-group handling of the unlimited dimension
1339      - early initialization of MNC w/ flags read at the eeboot stage
1340        and lookup tables set in initialize_fixed
1341      - write all MNC output to a freshly-created directory
1342    o thermodynamics sea-ice (thsice) is now tested with testreport.
1343    o test exp. advect_cs: use the standard cs32 grid ; update output.
1344    o Added functionality to grdchk:
1345      pick global i,j,k position (or nearest wet) where to perform check.
1346    
1347    checkpoint52l_post
1348    o new land formulation:
1349      a) use ground enthalpy as prognostic variable to ensure exact
1350         energy conservation.
1351      b) account for water temperature and for latent heat of freezing
1352         in all processes (rain, run-off, ground storage)
1353      c) compute surface and ground temperature implicitly.
1354    o aim_v23 modification for new land model:
1355      a) Treat separately land / ocean / sea-ice surface fluxes
1356         to allow implicit computation of land & sea-ice surface temp.
1357      b) add snow precipitation.
1358    checkpoint52l_pre
1359    
1360    o fix problem (when 1 tile is empty) in min/max monitor.
1361    o fix bug in timeAve (u,vZetatave in common block)
1362    o no restoring terms under ice for pkg/seaice
1363    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1364    o bug fix for pkg/seaice pickups
1365    o change MNC call locations and add coordinate attributes
1366    o mask vorticity at the corner ; affects global_ocean.cs output
1367    o fix ini_curvilinear_grid ; test CS experiments with mpi
1368    o aim.5l_cs: modify sea-ice fraction input file ; update output
1369    o exf: Adding simple range check routine for exf fields after read
1370    
1371    checkpoint52k_post
1372    o removed top-level directory "diags"
1373      - we migrated these functions to pkg/timeave a long time ago
1374    o fixed bug introduced in pkg/monitor
1375    o accuracy ctrlprec = 32 insuffient for gradient checks using
1376      averaged fields (I/O via cost_averages)
1377      -> use ctrl.h in active_file*.F to control I/O precision.
1378    o paramter list of CALL ADTHE_MAIN_LOOP
1379    o added initial do_the_model_io to ecco
1380    o set all ...Freq to zero after cost_final
1381      taveFreq, dumpFreq, pChkptFreq
1382    o MAIN and ECCO differentiability restored
1383    
1384    checkpoint52j_post
1385    o fix nchklev in tamc.h for global_ocean...
1386    o Bringing flow and store directives up-to-date
1387    o Really weird thing!
1388      call do_the_model_io from the_main_loop with parameters
1389      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1390      TAF places a faulty re-call of initialise_varia
1391      after cost_final call which should not be there!
1392    checkpoint52j_pre
1393    
1394    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1395      error messages
1396    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1397    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1398      debug output
1399    o modfied mdsio_writefield.F to handle non-global files under exch2
1400    o update AIM Cubed-Sphere exp (aim.5l_cs):
1401      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1402    o update AIM Equatorial Channel exp:
1403      use standard aim_v23 pkg and change the SST fields to be more realistic.
1404    o globalFile now works with exch2
1405    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1406      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1407    o limit timeave output for hi-res integrations
1408    
1409    checkpoint52i_post
1410    o removed CPP_EEOPTIONS.h from verification/*/code
1411    o updated the tiling for global_ocean_pressure
1412    checkpoint52i_pre
1413    
1414    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1415      the old pkg/aim).
1416    
1417    checkpoint52h_pre
1418    o shortened offending lines in exch2_send_rx?.template
1419    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1420    o genmake2: add build & execute test for NetCDF code
1421    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1422      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1423    o added useSingleCPUIO flag to monitor.F and mon_out.F
1424    o added temporary hack for sea-ice dynamics on the cube:
1425      metric terms are ignored and it is assumed that
1426      there is no sea-ice on cube faces 1, 2, 4, and 5.
1427    
1428    checkpoint52f_post
1429    o added exch2 cube routines to pkg/exch2
1430    o modified hs94.cs-32x32x5 to use it
1431    o added new grid files to hs94.cs-32x32x5
1432    checkpoint52f_pre
1433    
1434    checkpoint52e_post
1435    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1436      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1437    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1438      to work with implicit vertical advection and AB ;
1439    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1440    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1441     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1442    checkpoint52e_pre
1443    
1444    o fix bug in impldiff when Nr=1 or Nr=2.
1445    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1446    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1447    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1448      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1449    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1450    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1451    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1452    
1453    checkpoint52d_post
1454    o re-tiled many expts to allow comparison in multi-processor mode
1455      - updated output accordingly
1456      - changed hs94.128x64x5 to use intial T from file rather than use the
1457        random number generator
1458    o add infrastructure in model routines for fizhi and gridalt packages
1459    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1460    o changes to permit hi-res, cubed-sphere, configuration
1461      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1462      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1463      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1464        of surface winds for the cube
1465      (A verification experiment, based on global_ocean.cs32x15, but with
1466       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1467       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1468       complete with example surface forcing files and matlab scripts to look
1469       at the output and compare it with that of global_ocean.cs32x15.)
1470    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1471       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1472       to conform to the common rule.
1473    o check-in the first version of the coupler + interfaces for multi-components
1474       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1475       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1476       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1477       - ocean and atmos. share the same horizontal grid (no interpolation).
1478       - exchanges between component and coupler is done in forward_step
1479    o new verification experiment, cpl_aim+ocn:
1480       coupled ocean - AIM atmosphere on cs32 grid.
1481    
1482    checkpoint52d_pre
1483    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1484    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1485    
1486    checkpoint52c_post
1487    o Fixing OPTIONS files for use of exf:
1488      - ALLOW_ECCO not needed
1489      - ECCO_CPPOPTIONS.h should not be included from
1490        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1491        as has been the case in the past
1492      - All cal/exf related options are currently set in
1493        single header file. Should remain so until we
1494        agree on a consistent new policy.
1495    o Removed all CPP options for cal package.
1496      cal has no more CPP options.
1497    o modified STOREs in GAD_ADVECTION
1498    o corrected key comp. for passkey
1499    
1500    checkpoint52b_post
1501    o new version: "thsice" of thermodynamic sea-ice pkg:
1502     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1503     - modify fluxes but do not change theta directly;
1504     - light cleaning of bulk_force pkg (still needed with thsice).
1505     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1506       + output_thsice.txt to test thsice & bulk_force pkgs.
1507    o put back grid & coriolis monitor output.
1508    checkpoint52b_pre
1509    
1510    o call "do_the_model_io" at the beginning (=> dump initial state)
1511    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1512    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1513      (need info on NUMBER_OF_PTRACERS)
1514    o missing PTRACERS headers in some routines
1515    o default tamc.h in pkg/autodiff supposed to crash
1516      to ensure proper customization
1517    
1518    checkpoint52a_post
1519    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1520      - moved surfaceTendencyTice from pkg/seaice to main code
1521      - subroutine FREEZE_SURFACE now limits only surface temperature
1522        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1523        => new output.txt for global_ocean.cs32x15 & global_with_exf
1524      - keep the old version of FREEZE for backward compatibility;
1525        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1526      - corresponding modifs for TAF directives
1527    o added surface flux output variables to TIMEAVE_STATVARS
1528    o time-averaged output for pkg/ptracers
1529    o fix problem with ECCO-related divided adjoint
1530      snapshot file was missing some ad-variables,
1531      but no warning issued by TAF
1532    
1533    checkpoint52a_pre
1534    o some bug fixes for #undef REAL4_IS_SLOW
1535    
1536    checkpoint52 = ecco_c52_e35
1537    o after testing adjoints of checkpoint51u_post
1538    
1539    checkpoint51u_post
1540    o this is the post-merge tag of the ecco-branch
1541      (needs another clean checkout and re-testing)
1542    o various natl_box_adjoint configs and results
1543      but no input fields
1544    o obcs adjoint not yet merged!
1545    o adding ECCO global 1x1 and 2x2 degree configs
1546    o updated/extended some store directives for seaice
1547    o pkg/ecco now containes ecco-specific part of cost function
1548    o top level routines the_main_loop, forward_step
1549      supersede those in model/src/
1550      previous input data.cost now in data.ecco
1551      (new namelist ecco_cost_nml)
1552    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1553    
1554    checkpoint51t_post
1555    o this is the pre-merge tag of the ecco-branch
1556    
1557    checkpoint51s_post
1558    o cleanup: removed various obsolete #define-s
1559    o pkg/grdchk
1560      - renamed 'ph-grd 3' to 'grad-res'
1561      - merged from ecco-branch
1562        (remaining bug fixes for obcs gradient checks)
1563      - additional high-precision output for testreport
1564        (grep for 'precision_grdchk_result')
1565    
1566    checkpoint51r_post
1567    o cleaned up or removed CPP_OPTIONS.h files
1568    o updated results for some of the tests to reflect the new
1569      optfiles (-ieee: -O0 instead of -O3)
1570    
1571    checkpoint51q_post
1572    o cd_code:
1573      - moved cd_scheme.F -> cd_code_scheme.F
1574      - separate read_checkpoint from cd_code_ini_vars.F
1575      - separated cd_code part from write_checkpoint
1576      - updated AD_SOURCE, generated .flow
1577      - added CD_CODE_VARS.h to the_main_loop
1578      - Moving cd_code specific store dir.s to pkg/cd_code
1579    o ctrl package totally restructured
1580      - pack/unpack now optional and decoupled from
1581        xx_/adxx_ I/O
1582      - ctrl_pack/unpack cleaned
1583        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1584      - confined inclusion of AD_CONFIG.h to where necessary.
1585    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1586    
1587    checkpoint51p_post
1588    o create initial cd_code package
1589      - WARNING: the initialization of fields within packages
1590        is broken because INI_FIELDS (where READ_CHECKPOINT is
1591        called) is called *before* PACKAGES_INIT_VARIABLES.
1592        This seems to be backwards since
1593        1) its important to initially zero the entire field including
1594           the "halo" region
1595        2) zeroing needs to be done *before* reading pickup info
1596           and the pickup call might or might not happen in any
1597           particular run
1598      - this needs an overhaul for R2
1599    o cleanup verification/*/code/GMREDI_OPTIONS.h
1600    o cleanup testreport
1601    
1602    checkpoint51o_post
1603    o bringing AD-related verif's up to date with genmake2
1604      - carbon/
1605      - global_ocean.90x40x15/
1606      - hs.94.1x64x5/
1607      - (front_relax/ )
1608    o (more) consistent directory structure for AD-related verif.'s
1609    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1610    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1611    o bug fix in find_alpha.F for MDJWF:
1612      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1613        change rho -> rho-rhoConst
1614      - replace call find_rho to find_rhonum
1615    o initialisation of rFlx extended to full array (required by TAF)
1616      and shifted to thermodynamics
1617    o removed PTRACERS.h in ptracers routine
1618    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1619    o Correcting initialisations for fVerU, fVerV.
1620    o helping TAF to recognize dependency on kUp for
1621      fVerU, fVerV
1622    o Replacing delZ by delR in pkg/ctrl/
1623    checkpoint51o_pre
1624    
1625    o undid all of cp51 pending some cleanups and discussion
1626    o added the [#include "AD_CONFIG.h"] statement to all files that need
1627       it for adjoint/tl #defines
1628     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1629     o removed tools/genmake since it no longer works
1630    
1631    checkpoint51n_post
1632    o modifications to make FREEZE flux visible to pkg/kpp
1633      - moved surfaceTendencyTice from pkg/seaice to main code
1634      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1635      - subroutine FREEZE now limits only surface temperature
1636        (this means new output.txt for global_ocean.90x40x15,
1637         global_ocean.cs32x15, and global_with_exf)
1638    o added surface flux output variables to TIMEAVE_STATVARS
1639    
1640    checkpoint51n_pre
1641    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1642    o added [#include "AD_CONFIG.h"] to all files that use the following
1643      defines:
1644      - ALLOW_ADJOINT_RUN
1645      - ALLOW_TANGENTLINEAR_RUN
1646      - ALLOW_ECCO_OPTIMIZATION
1647    
1648    checkpoint51m_post
1649    o incorporating changes to get TAMC/TAF working in genmake2
1650      - added new TAMC/TAF targets to the Makefile
1651      - various cleanups related to package handling
1652      - these changes should have no impact on the forward model
1653    
1654    checkpoint51l_post
1655    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1656     - faster algorithm for cal_addtime.F
1657     - higher precision arithmetic, where needed
1658     - pkg/exf *startdate variables changed from calendar date to
1659       model integration time
1660    
1661    checkpoint51l_pre
1662    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1663    o enable to apply restoring on S & T only in a latitude band.
1664    o update output (external_forcing_surf modif. change truncation errors)
1665       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1666    
1667    checkpoint51k_post
1668    o change default to: useNHMTerms=.FALSE.
1669     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1670       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1671     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1672        exp1, ideal_2D_oce
1673     - change data file of oceanic exp (leave the results unchanged for now)
1674       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1675    o set gravitySign automatically according to the vertical coordinate used
1676      (and change sign: back to "logical" value: +1 when R increases downward)
1677    o added an include barrier to the default CPP_OPTIONS.h and
1678      removed the #include "PACKAGES_CONFIG.h" from it
1679    o fix a bug in mom_fluxform (from chk51j_post)
1680    
1681    checkpoint51j_post
1682    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1683    o adjusted some flow directives (dynamics, thermodynamics)
1684    o added cubed-sphere case to test cost function
1685    o heckpoint_lev?_directives.h now include
1686      pkg-specific directives, whenever those are enabled.
1687    o Moving pkg-specific flow directives to corresponding pkg
1688      Moving pkg-specific differentiation list to corresponding pkg
1689      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1690      ---> conventions are
1691           - pkg_ad.flow
1692           - pkg_ad_diff.list
1693           - pkg_ad_check_lev?_dir.h
1694    
1695    checkpoint51i_post
1696    o merge of the branch-genmake2
1697      - knowingly breaks the older genmake
1698      - automatic generation of all ALLOW_${PKG_NAME} defines
1699      - new testreport supersedes older testscript
1700    o large number of package inclusion and header cleanups
1701    checkpoint51i_pre
1702    
1703    o new output for adjoin of global ocean vector invariant
1704    o fix for checkpoint of thermodynamic seaice and bulk_force
1705    o Steph gchem various cleanups
1706    
1707    checkpoint 51h_pre
1708    o fixed some single quotes
1709    o modify gchem pkg to be more versatile
1710    o modifications to clean up dic pkg
1711    o add pkg/cfc
1712    
1713    checkpoint51g_post
1714    o provide links for ARPACK and ADM*TLM
1715    o start removing verification/vero/
1716    o update AD-related stuff
1717      (in particular some IF-statements in model/src/ routines)
1718    o adding to verification/global_ocean.90x40x15/ adjoint of
1719      vector invariant setup
1720    
1721    checkpoint51f_post
1722    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1723    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1724      of tracer Green's fucntions for ocean inversion project.
1725    
1726    checkpoint51f_pre
1727    o Added on-the-fly spatial interpolation capability
1728        "USE_EXF_INTERPOLATION" to pkg/exf.
1729      - This is a temporary Cartesian-grid hack until
1730        the super-duper ESMF coupler becomes available.
1731      - See verification/global_with_exf/README for usage example.
1732      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1733        flags and modified pkg/seaice accordingly.
1734    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1735        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1736        non-local transport term.
1737    
1738    checkpoint51e_post
1739    o pkg/mom_vecinv:
1740      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1741      - add time-ave diagnostic of vorticity advection.
1742    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1743    o atmospheric geopotential: - include water vapor effect;
1744                                - use p^kappa in p* scaling.
1745    o land pkg: read initial state from files.
1746    o AIM : add stratospheric drag in the upper level
1747    
1748    checkpoint51d_post
1749    o change function ILNBLNK (=> last non-blank char.) to return zero
1750      (instead of the string length) when the string. char is empty
1751    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1752    o modif's to restore TAMC compatibility
1753      - avoid "_d" constructs in PARAMETER declarations
1754      - avoid interrupting lines by comment lines
1755    o Use cluster local disks for purely local I/O
1756      vs. globally visible disks needed for ctrl stuff
1757      (merged from ecco-branch)
1758      - new active_file_loc... and mdsio_..._loc routines
1759      - affected packages: autodiff, ctrl, grdchk, mdsio
1760    
1761    checkpoint51c_post
1762    o introducing integer flag debugLevel
1763      - debLevZero: suppress all output
1764      - debLevA: standard
1765      - debLevB: equivalent to current debugMode=.TRUE.
1766    o introducing pathname variable mdsioLocalDir for mdsio
1767      that can be specified at runtime
1768      (relevant for cluster I/O to local disk)
1769    `
1770    >>>checkpoint51b_post
1771    adjoint of ptracers
1772    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1773    o extended state in checkpoint_lev?, etc.
1774    o alternative ctrl/cost with tr1 or ptracer
1775    o new comlev1_bibj_ptracers
1776    o new ptracers.flow
1777    o made ptracers_forcing same as external_forcing_s
1778    o added verification for adjoint with ptracers
1779      - adm. grdchk fail so far
1780      - tlm. grdchk OK
1781      - checked tapelev/comlev recomputations: OK
1782    <<<checkpoint51b_pre
1783    
1784    checkpoint51a_post
1785    o added code for biogeochemistry package
1786      - new pkgs: dic, gchem
1787      - new subroutine in ptracers
1788    o modify code for biogeo packages
1789      - in model/src and pkg/ptracers
1790    
1791    checkpoint51
1792    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1793      - autodiff, ctrl, exf, grdchk, seaice
1794      kept separate packages
1795      - cost, ecco, obcs
1796    o updating verification/internal_wave, verification/lab_sea
1797      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1798    
1799    checkpoint50i_post
1800    o Preparing next differentiable checkpoint and sync
1801      of MAIN vs. ecco-branch
1802      - 1st step: this one is differentiable
1803      - 2nd step: next(! not this) checkpoint will have updated packages
1804                  from ecco-branch)
1805    
1806    checkpoint50h_post
1807    o new package "land": provide surface BC for AIM.
1808    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1809    o AIM: use true log-P extrapolation for near surface temp (= as in
1810        F.Molteni paper) ; update aim.5l_cs output.
1811    o New variable in PARM03 for more flexible pickups
1812    o somewhat cleaned package initialisation sequence for
1813      ctrl/ cost/ ecco/ in packages_... routines
1814    
1815    checkpoint50g_post
1816    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1817      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1818      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1819        made the default because of faster convergence than ADI
1820    
1821    checkpoint50f_post
1822    o exf totally restructured
1823      - replaced all exf_set_ routines by one generic exf_set_gen.F
1824        and made sure it's still differentiable
1825      - split exf_getffields.F into new exf_bulkformulae.F
1826      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1827      - updated adjoint/makefile and relevant verif. accordingly
1828    
1829    checkpoint50f_pre
1830     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1831          + change Evap over land. (update aim.5l_cs output)
1832     o added missing .cvsignores and made uniform across expts
1833     o changed configuration of tidal_basin_2d expt
1834     o added pkg/debug functions for tracing code in fatal crashes
1835     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1836     o new fn in pkg/monitor to stop model if solution grows too big
1837     o removed lots of single quotes from comments
1838    
1839    checkpoint50e_post
1840    o make KPP work with PTRACERS
1841     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1842       nearly a copy of kpp_transport_s
1843     - there is no analogue to SurfaceTendencyS, so I have to use
1844       gPtr(of the surface layer) instead
1845    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1846    checkpoint50e_pre
1847    
1848    checkpoint50d_post
1849    o change kpp output from multiple-record state files to single-record state
1850      files analogous to write_state.F
1851    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1852      analogous to the cg2d-related output.
1853    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1854      so that writing to internal file fn (with length 512) fails.
1855    checkpoint50d_pre
1856    
1857    checkpoint50c_post
1858    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1859    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1860    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1861    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1862    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1863    
1864    checkpoint50c_pre
1865    Merging from release1_p13:
1866    o bug fix for pkg/seaice dynamic solver
1867    o Added SEAICE_initialHEFF to pkg/seaice
1868    
1869    checkpoint50b_post
1870    o store u*,v* in gU,V instead of in guNm1,gvNm1
1871    o in order to put the momForcing out of the Adams-Bashforth:
1872      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1873      to timestep.F
1874    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1875    o re-generate output for highly sensitive test-exp:
1876       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1877    
1878    checkpoint50b_pre
1879    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1880    o corrected CPP option mismatch in exf_Bulk... functions for case
1881      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1882    
1883    checkpoint50a_post
1884    o Bug fix for merging between c50 and KPP.
1885      ikey was passed from thermodynamics to kpp_calc via
1886      common block rather than being recomputed in kpp_calc,
1887      in contradiction with new key itdkey.
1888      New key ikppkey created, and tamc.h headers updated.
1889    
1890    checkpoint50
1891    - 2nd step of merge with ecco-branch:
1892      merge changes in ecco-branch back into main trunk
1893    - bug fix in find_alpha
1894    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1895    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1896    - merged some sliced AD support routines
1897    
1898    checkpoint49
1899    merged from ecco-branch:
1900    o exf:
1901      - Enable initialisation of forcing fields to constant
1902        (runtime) values.
1903      - in exf_getffields.F
1904        Reduce i-/j-loop to interior domain, discarding overlaps.
1905        That also fixes wrong TAF-key computations for key_1, key_2
1906        with bulf formulae.
1907      - exf_init.F modify #ifdef for exf_init_evap
1908      - exf_getffieldrec.F, ctrl_getrec.F
1909        The following INT-usages are not safe:
1910          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1911          fldcount = int(fldsecs/fldperiod) + 1
1912        and were modified.
1913    o autodiff: checkpoint_lev...
1914      - updated storing for bulk formulae (some arrays were missing)
1915      - added state for seaice package
1916      - synchronized with main branch
1917    o DIVA:
1918      Modif.s in
1919      - the_main_loop.F
1920      - the_model_main.F
1921      and added cost_final_restore.F cost_final_store.F
1922      o With these changes, it is possible to fully separate
1923        the first forward run to compute the cost function (mdthe_main_loop)
1924        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1925        into separate model executions.
1926        This enables better tuning of DIVA to given queue sizes.
1927      o Loss of cost function value in consecutive DIVA runs is
1928        fixed by storing to 'costfinal' file.
1929      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1930        beginning/end of adjoint integration is accounted for.
1931      The current changes apply to TAF-1.4.26.
1932      TAF has one remaining bug, requiring one manual change
1933      (see MITgcm manual).
1934    o cal: synchronized between MAIN and ecco-branch
1935    
1936    checkpoint48i_post
1937    o Changes to restore differentiability of code w.r.t. previous tag
1938      (mostly adding new routines to make list and replacing
1939      pressure by totPhiHyd).
1940    o Updated and merged grdchk package
1941      - has both ADM and TLM checks
1942      - works for single- and multi-proc.
1943      - output cleaned
1944      - worked successfully for parallel DIVA
1945    o genmake:
1946      - Adding -platform=SP4
1947      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1948    o Modif. for DIVA:
1949      ctrl_unpack should not be called in intermediate DIVA interval.
1950      (similar thing would apply for active files such as
1951      tbar, sbar, psbar, which should not be reinitialised;
1952      only relevant for ecco-branch)
1953    
1954    checkpoint48h_post
1955    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1956    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1957    o Added SEAICE_initialHEFF to pkg/seaice
1958    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1959    
1960    checkpoint48g_post
1961    --- EOS:
1962    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1963      store total Potential in totPhyHyd for diagnostics & EOS.
1964    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1965    --- Pressure/geopotential gradient:
1966    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1967    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1968      ( changes results of global_ocean_pressure )
1969    o NLFS + z-coord.: add eta*Rho' contribution.
1970    o accurate phiHyd when using interface-W at the middle between 2 centers
1971     ( changes results of ideal_2D_oce )
1972    o includes r* 2nd term in potential gradient.
1973    
1974    checkpoint48f_post
1975    Merging from release1_p12:
1976    o Modifications for using pkg/exf with pkg/seaice
1977      - improved description of the various forcing configurations
1978      - added basic radiation bulk formulae to pkg/exf
1979      - units/sign fix for evap computation in exf_getffields.F
1980      - updated verification/global_with_exf/results/output.txt
1981    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1982      (SBO) core products, including oceanic mass, center-of-mass,
1983      angular, and bottom pressure (see pkg/sbo/README.sbo).
1984    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1985      to avoid negative values in shallow regions.
1986      - updated verification/natl_box/results/output.txt
1987      - updated verification/lab_sea/results/output.txt
1988    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1989    o Added useSingleCpuIO option (see PARAMS.h).
1990    o Updated useSingleCpuIO option in mdsio_writefield.F to
1991      work with multi-field files, e.g., for single-file pickup.
1992    o pkg/seaice:
1993      - bug fix in growth.F: QNET for no shortwave case
1994      - added HeffFile for specifying initial sea-ice thickness
1995      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1996    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1997      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1998    o pkg/seaice:
1999      - adjoint-friendly modifications
2000      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2001    
2002    checkpoint48e_post
2003    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2004    o dynamics: change definition of computational domain & adapt mom_fluxform
2005      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2006    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2007        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2008        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2009        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2010        inverted_barometer solid-body.cs-32x32x1
2011      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2012    
2013    checkpoint48d_post
2014    o in preparation for r*:
2015     a) use pre-computed gradient of hydrostatic potential:
2016        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2017     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2018        => affects results of glob_oce_pressure (different truncation error)  
2019      update output.txt of ideal_2D_oce & global_ocean_pressure
2020    
2021    checkpoint48d_pre
2022    o in preparation for r*:
2023      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2024      pass the 2 comp. of the grad. as arguments to momentum S/R.
2025      but for the moment, only used if it does not change the results.
2026    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2027    
2028    checkpoint48c_post
2029    Modifications in treatment of initial flux forcing controls
2030    to avoid extra storing of flux fields.
2031    
2032    checkpoint48c_pre
2033    o Added tidal_basin_2d experiment (currently 1D!)
2034    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2035    
2036    checkpoint48b_post
2037    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2038     (modification to pressure gradient not yet implemented)
2039    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2040      (for U & V) that are used for vertical advection of momentum.
2041    
2042    checkpoint48a_post
2043    o In preparation for r*, use temp. array to compute vertical transport
2044       in flux-form momentum pkg. => change results of few test-exp.
2045      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2046                        lab_sea, natl_box & plume_on_slope
2047    
2048    checkpoint48
2049    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2050    
2051    checkpoint47j_post
2052    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2053    o moved adexch from forward_step to addummy_in_stepping
2054    o added exch in ctrl_map_...
2055    o aveFreq.=0. at end of cost_final to avoid overwrite in
2056      reverse checkpointing loop
2057    o Yet more changes in gmredi:
2058      * adgmredi_calc_tensor
2059        avoiding all recomputation of gmredi_slope_limit
2060      * adgmredi_x/y/rtransport
2061        added flag for excessive storing to avoid recomp. of
2062        u/v/rtans, dTdx/y/z
2063        -> this is not really necessary and very memory-consuming
2064      * adgmredi_slope_psi:
2065        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2066      * gmredi_slope_limit
2067        re-activated full calculation of taperfct for case 'ac02'
2068    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2069    
2070    checkpoint47i_post
2071    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2072    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2073      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2074    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2075    o gmredi: fix few bugs.
2076    
2077    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2078    This will be a good checkpoint to plug into the ecco-branch.
2079    o few modif.'s to get latest version adjointed
2080      (mainly kick out code in ini_linear_phisurf)
2081    o modif's to run adjoint with exactConserv
2082    o case GM_BOLUS_ADVEC should be cleaned
2083      S/R gmredi_slope_psi should be cleaned
2084    o verification/carbon now has exactConserv=.TRUE.
2085    
2086    checkpoint47g_post
2087    o time-average AIM output: becomes independent from statvars time-average
2088      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2089    o After TAF bug fix:
2090      Tested adjoint of gmredi package.
2091      Tests were done with checkpoint47 rather than with latest
2092      checkpoint47f_post since the latter is broken for the adjoint
2093      verification/carbon/ contains both ADM and TLM gradient checks.
2094    Here they are, before they get changed/lost/stolen.
2095    Mostly modif.'s to fix numerical sensitivities.
2096    Gradient checks OK for
2097    - GM_taper_scheme:
2098      * clipping
2099      * ac02
2100      * linear
2101      * glw91
2102      * dm95
2103      * ldd97
2104    - GMREDI_OPTIONS:
2105      * GM_VISBECK_VARIABLE_K
2106      * GM_NON_UNITY_DIAGONAL
2107      * GM_EXTRA_DIAGONAL
2108      * GM_BOLUS_ADVEC
2109    in conjunction with data.gmredi parameters to be checked in
2110    in a few minutes under verification/carbon/code/
2111    
2112    checkpoint47f_post
2113    Merging from release1_p10:
2114    o modifications for using pkg/exf with pkg/seaice
2115      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2116        and SEAICE_EXTERNAL_FLUXES
2117      - pkg/exf CPP options EXF_READ_EVAP and
2118        EXF_NO_BULK_COMPUTATIONS
2119      - usage examples are Experiments 8 and 9 in
2120        verification/lab_sea/README
2121      - verification/lab_sea default experiment now uses
2122        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2123    
2124    checkpoint47e_post
2125    o created a tag prior to creating a branch
2126    
2127    checkpoint47d_post
2128    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2129      at the bottom boundary had an erroneous half slip boundary condition
2130    o added bottom drag and no slip boundary condition capabilities to
2131      oceanic pressure coordinates code
2132    o added new verification experiment global_ocean_pressure, this experiment is
2133      also described in the tutorial section of the manual
2134    checkpoint47d_pre
2135    
2136    checkpoint47c_post
2137    o Added a verification experiment for a global cubed-sphere ocean run
2138      -  verification/global_ocean.cubed32x32x30
2139      -  uses pkg/therm_seaice and pkg/bulk_forcing
2140    
2141    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2142    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2143      when using P-coordinate; only implemented for atmospheric config.
2144    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2145      NOTES: requires option NONLIN_FRSURF to be "#define".
2146    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2147    
2148    checkpoint47b_post
2149    Merging from release1_p9:
2150    o pkg/seaice
2151      - removed GOTO's and added taf directives
2152      - double precision constants to reduce the g77 (Linux)
2153        to F77 (SGI) differences reported in release1_p8
2154    o tools/genmake
2155      - added SGI options
2156    o verification/testscript
2157      - updated to that of checkpoint47a_post
2158    o verification/global_ocean.90x40x15/input/eedata
2159      - modified for SGI f77 compatibility
2160    o verification/lab_sea
2161      - added description of sea-ice model
2162      - added missing matlab routines
2163      - added test of thermodynamics parallelization
2164    
2165    checkpoint47a_post
2166    o new pkg: aim_v23
2167     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2168       for now, keep the same surface forcing as before.
2169     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2170     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2171     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2172    o add diagnostic of surface correction term in monitor output
2173    
2174    o bulk_force and therm_seaice
2175    - Two packages:  bulk_force (Bulk forcing)
2176      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2177    - Earlier integration from Stephaine Dutkiewicz
2178      and Patrick Heimbach.
2179    - Two ifdef statements for compile time,
2180       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2181    
2182    checkpoint47
2183    differentiable version of checkpoint46n_post
2184    o bug fix in quasihydrostaticterms
2185    o * "clean" adjoint code (in terms of extensive recomputations)
2186        can now be obtained for all GMREDI options (i.e. for
2187        - GM_VISBECK_VARIABLE_K
2188        - GM_NON_UNITY_DIAGONAL
2189        - GM_EXTRA_DIAGONAL
2190        - GM_BOLUS_ADVEC )
2191      * However, wrong gradient check problem remains unsolved.
2192      * New CPP options have been introduced for different
2193        tapering schemes
2194    o external_fields_load now part of differentiation list
2195    o pressure needs multiple storing;
2196      would be nice to have store_pressure at beginning or
2197      end of forward_step, e.g. by having phiHyd global (5-dim.)
2198      (NB: pressure is needed for certain cases in find_rho,
2199      which is also invoked through convective_adjustment).
2200    o recomputations in find_rho for cases
2201     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2202    o #define ATMOSPHERIC_LOADING should be differentiable
2203    o ini_forcing shifted to begining of initialise_varia
2204    o Incorporating QNVS line search routines into MITgcm
2205      (this is separate code, and therefore not under pkg)
2206      lsopt/, optim/
2207    o Updated verification/carbon/
2208      - #define GM_VISBECK_VARIABLE_K
2209      - GM_taper_scheme    = 'ldd97'    
2210    
2211    checkpoint46n_post
2212    Merging from release1_p8:
2213    o verification/natl_box:
2214      updating new external_fields_load routine
2215    o New package: pkg/seaice
2216      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2217      The sea-ice code is based on Hibler (1979-1980).
2218      Two sea-ice dynamic solvers, ADI and LSR, are included.
2219      In addition to computing prognostic sea-ice variables and diagnosing
2220      the forcing/external data fields that drive the ocean model,
2221      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2222      The implied surface heat flux is then stored in variable
2223      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2224      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2225      non-local transport term.  Because this call precedes model
2226      thermodynamics, temperature under sea-ice may not be "exactly" at
2227      the freezing point by the time theta is dumped or time-averaged.
2228      N.B.: fairly large differences in accuracy occur across
2229            different platforms/compilers; comparison between
2230            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2231            generated output gives:
2232       T           S           U           V
2233      C D M    c        m  s        m  s        m  s        m  s
2234      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2235      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2236      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2237    
2238      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2239    o GAD:
2240      - generated new common blocks to account for call of
2241        same gad routines with differing traceridentities
2242        (needed to modify tracerIdentity indices in GAD.h)
2243      - generated separate common blocks for case useCubedSphereExchange
2244        (Department of Futurology)
2245      - parameter lists to gmredi_?transport: added tracerIdentity
2246      - added new key indices to tamc.h
2247    o external_fields_load:
2248      - added this routine to TAF list
2249      - needed to make some common blocks global and additional storing
2250        along the same lines as exf package (checkpoint_lev?_directives.h)
2251    o exf:
2252      updated external forcing package
2253      - bug fixes carried over from ecco-branch
2254        (missing OBCS_OPTIONS.h in two routines)
2255      - enable easy to use "no forcing".
2256      - added exf I/O for atmospheric loading
2257      - added exf I/O for runoff data
2258      - transfered scaling between exf <-> MITgcm to exf namelist
2259    o Adding new verification experiment global_with_exf.
2260      This verification experiment is almost identical to the
2261      global_ocean.90x40x15 experiment, except that it uses
2262      the exf (and cal) package instead of the
2263      external_fields_load routine (cf README file).
2264    
2265    checkpoint46m_post
2266    o modified testscript to return -- when there are no lines of "%MON" output
2267    o added new flag "quasiHydrostatic" for QH mode
2268      and new routine quasihydrostaticterms()
2269    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2270      New routine: mom_u_coriolis_nh()
2271    o fixed sign of non-hydrostatic metric terms in u and v equations.
2272      Depend on correct sign of gravitySign.
2273    o added work.pc* to .cvsignore in aim directories using ifc
2274    o introduced flag for controllin non-hydrostatic metric terms
2275    o removed gravitySign from PARM04
2276    o switched to g77/ifc from pgf77 in aim experiments
2277    
2278    checkpoint46l_post
2279    o made convective adjustment work with pressure coordinates:
2280     - changed the direction of k-loop in convective_adjustment.F for the
2281       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2282     - adjusted the reference pressure k-index in convective_adjustment.F
2283     - adjusted the convection condition in convect.F (in analogy to
2284       calc_ivdc.F)
2285     - convective_adjustment no longer computes anything on the halos
2286     - removed the warnings about negative salinity from find_rho.F and
2287       find_alpha.F; instead the new routine look_for_neg_salinity, called
2288       at the beginning of find_rho, find_alpha, and find_beta, does a
2289       check of the entire slice, if CPP-option
2290       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2291    checkpoint46l_pre
2292    
2293    checkpoint46k_post
2294    o fixed the verification/global_ocean.90x40x15 experiment:
2295     - new bathymetry (the world according to A., JMC, and M.)
2296     - new initial fields and forcing fields (*.bin files)
2297     - new POLY3.COEFFS (for the next release one should switch to a full
2298       equation of state: JMD95P or MDJWF)
2299     - fixed several errors and redundancies in the data file
2300     - experiment uses looped cells
2301     - added matlab directory with diagnostic scripts for plotting of output
2302    
2303    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2304     - read AIM physics parameters from a file (data.aimphys)
2305     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2306    
2307    checkpoint46j_post
2308    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2309    o move wVel computation at the end of the time step, in S/R integr_continuity
2310    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2311    o update timeave pkg for wVel diagnostic.
2312    checkpoint46j_pre
2313    
2314    checkpoint46i_post
2315    o Clean up AIM package (and keep the results unchanged):
2316      include CPP_OPTION and use IMPLICT NONE in all routines ;
2317      declare all the variables _RL ; use _d 0 for all numerical constants.
2318      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2319    
2320    checkpoint46h_post
2321    o cleaned up the use of rhoNil and rhoConst.
2322      - rhoNil should only appear in the LINEAR equation of state, everywhere
2323        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2324        and the dynamical equations are all divided by rhoConst
2325    o introduced new parameter rhoConstFresh, a reference density of fresh
2326      water, to remove the fresh water flux's dependence on rhoNil. The default
2327      value is 999.8 kg/m^3
2328    o cleanup up external_forcing.F and external_forcing_surf.F
2329      - can now be used by both OCEANIC and OCEANICP
2330    checkpoint46h_pre
2331    
2332     Added code to convert surface volume flux (fresh water) into
2333     a mass flux when using P coordinates in the ocean (OCEANICP).
2334     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2335    
2336    checkpoint46g_post
2337    o Include a new diagnostic variable phiHydLow for the ocean model
2338      - in z-coordinates, it is the bottom pressure anomaly
2339      - in p-coordinates, it is the sea surface elevation
2340      - in both cases, these variable have global drift, reflecting the mass
2341        drift in z-coordinates and the volume drift in p-coordinates
2342      - included time averaging for phiHydLow, be aware of the drift!
2343    o depth-dependent computation of Bo_surf for pressure coordinates
2344      in the ocean (buoyancyRelation='OCEANICP')
2345      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2346        Theta, Salinity, and Pressure in the parameter list. This routine is
2347        presently contained in find_rho.F. This routine does not give the
2348        correct density for 'POLY3', which would be a z-dependent reference
2349        density.
2350    o cleaned up find_rho
2351      - removed obsolete 'eqn' from the parameter list.
2352    o added two new verification experiments: gop and goz
2353      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2354    checkpoint46g_pre
2355    
2356    checkpoint46f_post
2357    o Enable tangent linear (forward mode) gradient checks:
2358      - extended active file handling to g_... files
2359      - added TANGENT_SIMULATION to theSimulationMode
2360      - extended grdchk package accordingly
2361    o added tangent linear setup in verification/carbon/code_ftl
2362    o added adjoint setup in verification/front_relax/code_ad
2363    
2364    checkpoint46e_post
2365    o Added new equation of state -> MDJWF
2366      - EOS of McDougall et al., 2002, JAOT, submitted
2367      - caveat: the equation of state is only valid for a smaller (more
2368        realistic?) range of values than JMD95P/Z and UNESCO
2369      - added masks to the calculation of pressure in store_pressure
2370      - added more check values for density in check_eos (ini_eos.F), some of
2371        the old check values are out of the range of the MDJWF-eos, so don't
2372        expect perfect matches for those
2373    checkpoint46e_pre
2374    
2375    checkpoint46d_post
2376    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2377      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2378      case of pressure coordinates. eosType='JMD95Z' in
2379      combination with buoyancyRelation='OCEANICP' now causes an error.
2380    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2381      in find_alpha/beta.
2382    checkpoint46d_pre
2383    
2384    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2385      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2386    
2387    checkpoint46c_post
2388    o Changes necessary for ocean in p-coordinates
2389     -  Added new buoyancy relation = 'OCEANICP'
2390     -  Added new parameters = gravitySign (this used to be contained inside
2391        the factor dRdZ which I added when we first switched to R coordinates).
2392     X GM/Redi is not compatible (yet)
2393     X bottom drag and no-slip need to be debugged.
2394    checkpoint46c_pre
2395    
2396    checkpoint46b_post
2397    o Added new equation of state -> JMD95Z and JMD95P
2398      - EOS of Jackett and McDougall, 1995, JAOT
2399      - moved all EOS parameters into EOS.h
2400      - new routines ini_eos.F, store_pressure.F
2401    o Added UNESCO EOS, but not recommended because it requires
2402      in-situ temperature (see JMD95)
2403    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2404      unesco.f to be used with POLY3
2405    checkpoint46b_pre
2406    
2407    checkpoint46a_post
2408    o Added (atmospheric) pressure loading
2409      - new field in FFIELDS.h, etc...
2410      - new cpp flag ATMOSPHERIC_LOADING
2411    o Changed hFacC to _hFacC in calc_phi_hyd.F
2412    o Added SHORTWAVE_HEATING to some files for consistency
2413    checkpoint46a_pre
2414    
2415    checkpoint46
2416    further merges from release1_p5
2417    o new ctrl package
2418      - adopted from ECCO environment to enable optimization
2419      - added Eliassen Palm fluxes to controls
2420    o added Eliassen Palm flux controls to gradient check package
2421    o cost package
2422      - Compatible with new ctrl package
2423      - added Eliassen Palm cost hooks
2424      - modif's of existing cost functions
2425    o Adjoint-related bug fixes in kpp:
2426      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2427      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2428    o autodiff package
2429      - flow directives:
2430        + new for S/R do_the_model_io
2431        + enhanced for S/R checkpoint
2432        + new gmredi.flow
2433      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2434        disable adcommon.h/g_common.h by default.
2435      - fixed problem for adjoint of global_max
2436    o modified verification/carbon/
2437    o New setup for adjoint of global_ocean
2438    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2439    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2440    o incorporated hooks for sponge layer code (external_forcing.F)
2441    
2442    checkpoint45d_post
2443    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2444    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2445      (affects plume_on_slope "cg2d" output)
2446    o add new parameter deltaTfreesurf for free-surface time stepping
2447    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2448  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2449  o change phiMin in exp1 (to agree with documentation)  o change phiMin in exp1 (to agree with documentation)
2450  o add new flags:  o add new flags:

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