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revision 1.97 by adcroft, Tue Nov 5 19:17:20 2002 UTC revision 1.719 by jmc, Thu Aug 24 20:41:53 2006 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o change controling S/R for writing pickup file (new S/R do_write_pickup)
8      and clean-up reading/writing of pickup files.
9    o fix local version of read/write pickup (NH part) in rotating_tank/code
10    o simplify EXCH interface:
11     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
12     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
13    o added the regrid package
14    o shelfice:
15     - add a simple boundary layer scheme to reduce noise
16     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
17    
18    checkpoint58n_post
19    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
20       local variable (not in common block).
21    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
22      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
23      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
24        to work with SingleCpuIO.
25    o add "_d 0" to real constant of pkg/cfc subroutines ;
26       update exp. cfc_exemple & tutorial_cfc_offline output files.
27    o multi-threading and IO:
28      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
29        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
30      - barrier before and after reading.
31      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
32      - avoid using MDS_WRITELOCAL for LAND pkg output.
33      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
34        common-block variables ; Allows multi-threading with master-thread IO.
35    o change default MAX_NO_THREADS from 32 to 4 ;
36      and stop cleanly when MAX_NO_THREADS is too small.
37    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
38    
39    checkpoint58m_post
40    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
41       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
42    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
43       keep global_ocean.90x40x15 (for AD testing) with former secondary test
44       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
45    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
46        add MITgcm_tutorials (= code + all the tutorials)
47    o ecco, option to compute cost for total ssh (mean+anom)
48    o consistent with addition of ptracer and ssh in pkg/profiles
49    o profiles: adding ptracer and ssh
50    o testreport: change multi-test output-file name
51      (from output.txt.{name} to output.{name}.txt)
52    o profiles: now ok for mutli-tiles case
53    o seaice: add 4 parameters for different advection schemes for area,
54      (effective) seaice thickness, enthalphy, and snow height. Their default
55      is the standard parameter SEAICEadvScheme
56    o calc_gw:
57     - add cosFacU in zonal viscous flux (harmonic.visc.).
58     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
59       of tutorial_plume_on_slope.
60    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
61    o calc_gw: true flux-form, account for horizontal grid spacing.
62      update rotating_tank results, but not plume_on_slope (affected at
63      truncation level, 11 digits).
64    
65    checkpoint58l_post
66    o calc_gw:
67     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
68     - remove side-drag for now (need to fix it); update plume_on_slope results.
69     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
70    o commit code to make SST/SSS weights spatially variable
71      (based on either variable in-situ or variable initial T/S weights)
72    o pkg/ecco:
73      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
74        now based on horizontally varying weights wthetaLev, wsaltLev
75      * cost_averagesflags now returns year indices in addition to day, month
76      * sflux balance is performed on annual basis
77        (sflxumm, sfluxmm2, bal_sfluxmm)
78      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
79        including separate counting and multipliers
80    o pkg/rbcs
81      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
82    
83    checkpoint58k_post
84    o testreport:
85     - always build in dir. "build" (if not there, mkdir build instead of building
86       & running in input)
87     - run in dir run (if it exists), in build otherwise.
88     - call prepare_run (if input/prepare_run exists)
89     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
90    o pkg/exf modifications to interpolation and rotation routines for more
91       reasonable treatment of North Pole singularity: for tracers North Pole
92       value is set to northernmost zonal-mean value, for zonal velocity it is
93       set to zero, and for meridional velocity it is set to northernmost value.
94    o pkg/exf/exf_check_range.F
95     - add tile index to diagnostics and move stop statement to the very
96       end of the routine.
97    o pkg/diagnostics: (diagnostics_main_init.F)
98      define title of isomorphic variables according to the current config.
99    o pkg/thsice with pkg/seaice dynamics:
100    - fix domain of computation (interior only, required for exf) and do exchanges
101    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
102    o towards a standard way of dealing with multi-threading in MONITOR
103      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
104    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
105       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
106    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
107    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
108    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
109       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
110    o tracer advection:
111     - clean-up and simplify calc_common_factors.F
112     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
113       advection subroutine (but still not used within DST advection S/R)
114    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
115    
116    checkpoint58j_post
117    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
118      from file (collects calls previously in FORWARD_STEP)
119    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
120    o adjoint store dir. adjusted accordingly
121    o genmake2
122      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
123    
124    checkpoint58i_post
125    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
126      on wind stress (SEAICEstressFactor defaults to 1.)
127    o Total number of Timers is finite (<=40): comment out 2 non-essential one
128      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
129    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
130      on CS-grid: no longer loosing mass.
131    o exf & curvilinear-grid: no longer modify longitude xC & xG.
132    o pkg/ggl90: fix sloppy output and fix a bug
133    o pkg/seaice: added SEAICEuseEVPpickup parameter
134      - Set to false in order to start EVP solver with
135        non-EVP pickup files when using SEAICEuseEVP
136      - fix sign error in diffusion in seaice_calc_rhs
137    
138    checkpoint58h_post
139    * Modifications for bottom topography control
140      o replace hFacC by _hFacC at various places
141      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
142      o add non-self-adjoint cg2d_nsa
143      o update autodiff support routines
144      o re-initialise hfac after ctrl_depth_ini
145      o works for 5x5 box, doesnt work for global_ocean.90x40x15
146    * Adding verification for 5x5 box (4-layer) bottom topography control
147    
148    checkpoint58g_post
149    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
150       used for mean seasonal cycle, mean diurnal cycle); add an example
151       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
152    o pkg/ggl90:
153      - add parameter (minimum surface kinetic energy)
154      - fix bug (avoiding division by zero)
155    o couple pkg/thsice to pkg/seaice:
156      - modify advection in seaice to accomodate new scalar fields to be advected
157      - only muliDimAdection scheme work with seaice/thsice
158      - mapping of thsice-variables to seaice-variables, back and forth
159      - does not break the verification experiments, but does not give the
160        desired results either
161    o pkg/seaice
162      - make (default) second order advection a bit less confusing?
163    
164    checkpoint58f_post
165    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
166      to pkg/seaice):
167      - new routines thsice_map_exf and thsice_get_exf provide the interface
168      - add an additional formal parameter to thsice_solve4temp
169    o pkg/exf:
170      - add new fields wspeed, snowprecip (to be able to couple to thsice)
171      - correct Stefan-Boltzmann constant
172      - new parameter for longwave surface emittance
173      - separate some stuff from exf_bulkformulae into new routines  
174        exf_radiation, exf_wind
175      - add new parameters and constants: longwave emissivity for ocean, ice
176        and snow, evaporation parameters over ice
177      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
178        either wind from stress or stress from wind
179    o pkg/thSIce:
180    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
181    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
182       and THSICE_CALC_THICKN
183    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
184    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
185      to make debugging easier.
186    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
187    o pkg/bulk_force:
188      - clean-up comments and parameters ;
189      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
190    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
191      generate new output for test-experiment: aim.5l_cs.thSI
192    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
193      testreport accordingly
194    
195    checkpoint58e_post
196    o SEAICE_CGRID adjoint done
197    o R_STAR adjoint implemented.
198      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
199      * need to sort out init. of h0facc, etc.
200    o Make pkg/profile fully independent of ecco,cost, etc. stuff
201      to be able to use it in pure forward.
202    
203    checkpoint58d_post
204    o upgrade simple test-experiment to tutorial example:
205     step.1: duplicate the experiment and (step.2) will remove the old copy.
206      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
207      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
208      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
209      tutorial_global_oce_biogeo    <- copy of dic_example
210      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
211      tutorial_plume_on_slope       <- copy of plume_on_slope
212      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
213      tutorial_global_oce_optim     <- empty for now (David ?)
214      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
215     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
216    o correct a sign problem in cost_scat.F
217    o obcs and ptracers: fix boundary conditions for advections schemes
218      with larger stencil
219    o thsice adjoint: start
220    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
221      completeness
222    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
223      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
224    o ptracers adjoint:
225      * avoid extensive recomputatations
226      * fix missing re-init. of gptr (missed by TAF)
227    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
228      me to turn off the excessive output to STDOUT that this package produces
229    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
230      and add those terms in Vector-Invariant formulation.
231    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
232      if the control period (xx_hfluxperiod etc) is 0
233    o in profiles pkg, clean routines and fix details
234    o in ecco pkg, reading ssh data:
235      fix problem in case the model does not start at iter0=0
236    o fix mnc-pickup/restart for ptracers
237    o new package prifiles:
238      code to compute profile-based cost by Gael Forget
239      (modifs in ecco, ctrl, autodiff)
240    o Benign bug fix in initialization (spotted by M. Mazloff) of
241      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
242    
243    checkpoint58c_post
244    o adjoint: finish NLFS adjoint and provide reference output in
245      verification/global_ocean.90x40x15/results_ad_nlfs
246    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
247      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
248      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
249      with SEAICE_CGRID defined.
250    o move calendarDumps from "data" to "data.cal" and clean-up the code
251      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
252    o add useEXF & useCAL flags (for now, set in hard-coded way)
253    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
254      (were missing in NH mode, and wrong in quasihydrostatic mode).
255      waiting for Chris updated version of calc_gw to add those CALLs.
256    o fix bug in quasihydrostatic S/R ;
257      add a test for this option: global_ocean.90x40x15.qshyd
258    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
259      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
260    o add on/off flag useOffLine for package OFFLINE
261    o seaice:
262      - modify advection so that it works also on the C-grid
263      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
264        problem in multi-tile runs with C-grid
265      - add flags for clipping ice velocities and/or masking solver forcing
266      - fix drag (ocean on ice) formulation and a bug that caused noise in the
267        C-grid solver
268      - added a few comments to seaice_diffusion.F
269      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
270        are now exclusive)
271      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
272        required re-ordering the code a little:
273       + make DAIRN global variable (defined in SEAICE)
274       + move computation of the viscosities eta and zeta into a new separate
275         routine (because I need to recompute them in seaice_ocean_stress.F)
276    
277    checkpoint58b_post
278    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
279      update output.txt of exp. aim.5l_cs.thSI
280    o various mnc cleanups and improvements:
281      + shrink lookup tables by factor of ~4
282      + better error reporting when running out of lookup space
283      + able to handle longer path/file names (up to 500 chars)
284    o adjoint:
285      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
286      - TBD: "hidden" mom_vecinv recomp. in dynamics
287    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
288     (allow to differentiate between forcing components using new integer flags:
289      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
290     and add new flag to put Dissipation tendency out of Adams-Bashforth.
291    o ecco
292      - enable trend removal from SSH anomaly obs.
293    o adjoint
294      - a fix for PmEpR when #undef EXACT_CONSERV
295      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
296      - try to fix "hidden" recomp. in forward_step for NLFS
297        (NLFS seems broken sometimes after I checked it in)
298    o seaice:
299     - add c-grid version of the dynamic solver:
300       + three new routines that are the c-grid substitute lsr, dynsolver
301         and ostres
302       + put a few fields that were local to dynsolver into global common
303         blocks, so that I can move the computation of stresses etc into
304         seaice_lsr (saves coding but may break the adjoint).
305     - replace more hardwired parameters by runtime parameters
306     - add ice masks that mask the rhs of the implicit solvers where there
307       is no ice (commented out in seaice_dynsolver, because i am not sure
308       if this works properly), eventually this should replace the clipping
309       of ice velocities in seaice_dynsolver to +/-40cm/s.
310    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
311      include it only where its needed
312    o move balancing of fluxes before the call of external_forcing_surf
313    o seaice:
314      - correct units of turning angles (now they are really in degrees)
315      - move computation of GWATX/Y out of main routine into dynsolver
316      - initialize GWATX/Y in seaice_init
317    o Apply mask on Fresh-Water flux (needed for SSH forcing).
318      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
319    o seaice: add runtime flags for turning angles (default to zero)
320    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
321      and trend from exf forcing and ctrl control adjustments
322    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
323      (since checkpoint57x_post)
324    o change the default rotation period to 86164.s = the Earth rotation
325    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
326      and based on a reference stratification. Tested within hs94.cs-32x32x5.
327    o seaice advection: add code for choosing between the default (2nd order
328      central differences) and multiDim advection schemes provided by
329      pkg/generic_advdiff
330    o seaice:
331      - removed all references to SEAICE_GRID.h fields from
332        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
333        (cubed-sphere configuration will change a little)
334      - grid computations in seaice_init are obsolete now.
335      - cleaned up code a little so that is easier to read (hopefully).
336      - added new (better?) discretizations of default advection and diffusion
337        (turn on with SEAICEuseFluxForm)
338      - replace 1 in 3d global fields by kSurface in growth.F
339      
340    checkpoint58a_post
341    o seaice:
342      - bug fix in advect.F
343    o shelfice:
344      - separate shelfice load anomaly from pload (breaks with time
345        dependent forcing), => introduce constant field shelficeLoadAnomaly.
346        Its default is 0., but it may be computed more cleverly from (unknown)
347        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
348        done offline. A good approximation of the pressure load anomaly is
349        necessary to avoid large initial adjustment processes underneath
350        deep-reaching shelfice.
351      - small fix in ISOMIP shelfice_thermodynamics
352      - add more sophisticated thermodynamics of Hellmer (1989), this is
353        now the default
354      - give a few constants more intuitive names
355    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
356      if bulk formulae are used in long integration (especially EmPmR). Turn
357      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
358      if balancePrintMean, the imbalance that is substracted is printed to
359      STDOUT.
360    o fix bug (typo) in obcs_apply_eta.F
361    o add a new package shelfice which enables us to model the circulation
362      underneath shelf-ice with draughts of hundreds of meters.
363     - works
364     - to do: + include improved thermodynamics
365              + check whether kSurfC (from model/inc/SURFACE.h) can be used
366                instead of new field kTopC
367              + can we use topoFile, Ro_surf and existing code in ini_depth.F
368                instead of new field R_shelfIce and new code in ini_depth.F
369                and ini_mask_etc.F?
370              + adjust vertical mixing schemes?
371    o seaice pkg:
372     - add a cpp-flag to include a simple formula for a salinity dependent
373       freezing point of sea water at the surface
374     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
375       meridional stresses are now different (and hopefully correct)
376    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
377       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
378       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
379    o pkg/diagnostics: add options and parameters for regional-statistics
380       diagnostics ; define regions by reading a region-mask from a file
381       (might add other options later)
382    o pkg/bulk_force:
383     - add option and parameters to use AIM surface-flux formulae.
384     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
385       others forcing fields (defined in PARM05, parameter file "data") are loaded
386       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
387     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
388     - use the right EXCH call for uwind,vwind (to work on CS-grid).
389     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
390       and parameters (note: calcWindStress replaces .NOT.readwindstress).
391     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
392    
393    checkpoint58
394    o add "--embed-source" option to genmake2 which, when the supporting
395      tools can be compiled (as determined by genmake2) will turn on the
396      embed_files package which then embeds the entire MITgcm source code
397      (*.[fFhc] + Makefile) used for the build within the executable
398      - requested by CNH but off by default
399      - adds a paltry <9MB to the mitgcmuv executable in most cases
400      - only writes the output when useEMBEDSRC in eedata is true
401    o clean up 3-dim. relaxation codes:
402      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
403      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
404      * Thanks to Tom Haine for testing!
405    
406    checkpoint57z_post
407    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
408      affects output (@ truncation level) of exp. plume_on_slope ; updated.
409    o fix the pickup behavior for obcs in combination with ptracers
410    o fix a bug in ptracers_external_fields_load
411    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
412      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
413    o transfered surface NH pressure to eta field (if exactConserv).
414    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
415         and update lab_sea output.txt file.
416    o completing 3-dim. relaxation code: additional term
417         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
418      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
419      * At compile time, in "EXF_OPTIONS.h" set
420          #define  ALLOW_CLIMTEMP_RELAXATION
421          #define  ALLOW_CLIMSALT_RELAXATION
422      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
423          tauThetaClimRelax3Dim = 15552000.0,
424          tauSaltClimRelax3Dim  = 15552000.0,
425      * 3 cases:
426          1) Use a constant-in-time 3-dim. field
427          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
428          3) Real-time relax. to time-evolving prescribed field
429    o Adding Laplacian-type smoothness constraint on
430      initial and boundary (forcing) controls (ic, bc)
431      * enable at compile-time via
432        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
433      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
434      * Absolute scale somewhat unclear so far
435      * no area weighting was included since no other cost term does so far
436    
437    checkpoint57y_post
438    First step for a NLFS adjoint
439    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
440    o new init. routines for calc_r_star, calc_surf_dr
441    o still need to deal with ini_masks_etc
442    o testreport seemed happy
443    checkpoint57y_pre
444    
445    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
446    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
447    o add new offset feature to offline pkg (plus minor cleanup)
448    o cfc fixes for final year of integration
449    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
450      be in GCHEM_OPTIONS).
451    
452    checkpoint57x_post
453    o fix testreport Pb in multiple test experiment.
454    o cleanup our namelist syntax in verification:
455      - make it more F95 standards compliant (some work still needed)
456      - allows the vast majority of our tests to work with gfortran
457    o Non-Hydrostatic:
458     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
459     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
460    o Allow to apply AB on T,S rather than on AB(gT,gS):
461     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
462     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
463       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
464     - need a "clever" read_pickup to restart from the other AB formulation
465    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
466    o remove some unused variables (reduces number of compiler warnings)
467    o adjoint
468      * Disable useVariableViscosity for adjoint for time being
469        (there are a number of extensive recomputations)
470      * Initialize certain variables needed for adjoint
471    
472    checkpoint57w_post
473    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
474                 fix the singleCpuIO RS version of MDSWRITEFIELD
475       and add a WARNING if using globalFiles=T with multi-processors.
476    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
477      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
478    o tracer advection scheme:
479      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
480       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
481       was not very convenient).
482      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
483       (further tests needed for the implicit DST & Flux-Limiter schemes).
484    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
485      and sRef for convenience, handy, when you want to initialize
486      ptracers in a large domain with a constant non-zero value. Also,
487      untangle ptracers_init.F a little.
488    
489    checkpoint57v_post
490    o change dome exp. to use variable viscosity in side-drag terms.
491    o remove all the files from the cfc_offline test since they are now
492      incorporated into tutorial_cfc_offline which has been producing
493      identical results for a few days of testing
494    o add new parameter: sideDragFactor to enable half-slip-side BC
495      and change side-drag S/R to use viscosity from mom_calc_visc
496      (can switch back by setting sideDragFactor=0.); affects results at
497      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
498       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
499    o vorticity & strain are now computed without masking, to account for
500      no-slip-side BC in variable viscosity calculation ; mask is applied
501      anyway later on, before computing advection/coriolis terms.
502    o modify exp4 to test new obcs support for reading from external files
503      and for passive tracers
504    o fix behavior of ptracers_monitor when monitor output is written to a
505      netcdf-file; still not independent of monitor.F (writes in the same
506      file).
507    o change default value of tRef (put a uniform, meaningful value for ocean
508      & atmos) and initialize sRef (was missing, as Martin mentioned).
509    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
510      to be proportional to enstrophy dissipation length.  Thus,
511       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
512      This is now consistent with Smagorinsky and with the manual.
513    
514    checkpoint57u_post
515    o OBCS and PTRACERS: add open boundary support for passive tracers
516      - either use homogenous (pseudo) v.Neumann conditions or prescribe
517        OB-values from file; this is not different from the way theta and salinity
518        are treated
519      - however, Orlanski-radiation conditions are not supported, and the model
520        will stop if you use pTracers and Orlanski at the same time.
521      - beefed up the rountine obcs_external_fields_load: now only those open
522        boundary values are overwritten with values from files for which there
523        are really files, otherwise the OB-fields remain untouched. This makes
524        it possible to use different OBs at different ends of the domain (as
525        with EXF)
526    o reduce number of exch calls in shap_filt (s2).
527    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
528      truncation level) 4/5 MLAdjust test results (11&12 digits match).
529    
530    checkpoint57t_post
531    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
532    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
533      same truncation, independent of the face number: affects affects several
534      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
535    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
536      note that biharmonic viscosity + no-slip was not tested in any experiment.
537    o fix bug in non-linear free-surf side-drag ; generate new output for
538      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
539    o make mnc honor the writeBinaryPrec flag for most kinds of output
540    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
541    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
542      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
543    o add brackets in multi-terms sum to get same truncation, independent of
544      the face number (manage to get exactly same value of gU,gV at the cs-edge)
545      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
546    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
547      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
548      a maximum grid-scale Reynolds number.  Also, changes all length calculations
549      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
550      Suggested values of viscosity parameters found in mom_calc_visc.
551      Many new viscosity diagnostics available.
552    
553    checkpoint57s_post
554    o Add clearing-house for viscosity calculations, mom_calc_visc and
555      correct numerous bugs in LeithD and Smagorinsky discretizations.  
556      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
557      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
558      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
559      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
560      The Strain-Tension form is now called with useStrainTensonVisc=.true.
561      ViscAhStrain and viscAhTension are now retired.
562    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
563    o In response to JMC's bug report, genmake2 now ignores any soft-links
564      that it finds in the *current* directory when searching for files.
565      Soft-links found in any other source directories will still work as
566      they did before.
567    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
568      a C routine to unlimit the stack size
569    o mnc-ify pkg/aim snapshot vars
570    o mnc-ify pkg/land as requested by Daniel
571    o various changes to mnc including:
572      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
573      - output can now be grouped so that all files within a group
574          change the ITER portion of their names in lock-step together
575      - can now read ("global") PER-FACE (in addition to PER-TILE) files
576          and works with both EXCH1 and EXCH2 (but needs more testing)
577      - writing works for all verification test cases w/ g77 on Linux
578    
579    checkpoint57r_post
580    o make MNC variable initialization happen earlier
581    o add diagnostics for (almost) each term of the momentum Eq.
582    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
583    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
584    o remove MINIMAL_TAVE_OUTPUT option ;
585      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
586    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
587      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
588    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
589    o add time-dependent SST, SSS control
590    o cost terms in ecco/ modularized (new cost_generic.F)
591    o cost_averages routines are modularized (new cost_averagesgeneric.F)
592    o new infrastructure for seaice model vs. obs misfits in seaice/
593      * driver from the_main_loop.F is seaice_cost_driver.F
594      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
595      * gradient check in Exp. 6a of natl_box_adjoint/
596    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
597      (see README file)
598    
599    checkpoint57q_post
600    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
601    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
602      - bug was reported by Jean-Michel and Ian Fenty
603    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
604      update exp. cpl_aim+ocn output.
605    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
606      Needed for high-res. runs with large global files
607      to be able to limit tapelev size
608    o Changed some tests for adjoint:
609      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
610      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
611      * global_ocean.90x40x15/ back to default 3-level checkpointing
612    o Modifications to enable scripted COMMON to MODULE conversion
613      * verification/OpenAD/code/ has necessary scripts and description;
614      * converts, compiles and runs successfully;
615    
616    checkpoint57p_post
617    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
618    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
619      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
620    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
621    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
622      (was already the case for dissipation with mom_vecinv,
623       and also the case for grad.PhiHyd when staggered-timeStep)
624      This will allow to put dissipation out-off the AB time-stepping.
625     Unfortunately, affects truncation error. Update output of exp. that "fails"
626      (cg2d matching number) and leave the others for later: front_relax(10),
627      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
628      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
629    
630    checkpoint57o_post
631    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
632      (2) its ready to be documented during the 20050801 DocFest
633    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
634      for ideal_2D_oce and lab_sea on linux_ia32_g77
635    o set to #undef CTRL_SET_OLD_MAXCVARS_30
636      in global1x1_tot/code_seaice_adj to access indices 32, 33
637      (worth another tag)
638    
639    checkpoint57n_post
640    o adding precip control xx_precip 32
641    o adding swflux control xx_swflux 33
642    o Replacing 10 forcing penalty cost routines by 1 generic.
643    o Implementing partitioning in time-mean and variable adjustment
644      for atmos. state.
645    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
646    o in natl_box_adjoint:
647      * updated exp 1 to 10
648        (but does not have time-mean vs. variable split results yet)
649    o updated global1x1/*_seaice_adj/
650      to incorporate latest changes
651    o enable useSingleCpuIO for mdsio vector routines
652      (applies in particular to tapelev I/O)
653    o removed inefficient K-loop in all active_file*control*.F
654    
655    checkpoint57m_post
656    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
657      and advect_cs (use EXCH-2 and standard cs-32 grid files).
658    o pkg/exch2: filling of face-corner halo regions is optional
659      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
660    
661    checkpoint57l_post
662     tag before updating tutorials (pre-release-2)
663    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
664       for output and interpolation of input fields onto model grid)
665    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
666       Affects results of exp. rotating_tank ; update output.txt.
667    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
668          and taking the square quantity and/or using a fraction-weight field.
669    o fix aim_diagnostics_init.F mate numbers.
670    o add mnc output capability to diagnostics/diagstat and update
671      our cvsignore files for the ACSII output generated
672    
673    checkpoint57k_post
674    o lab_sea now uses diagnostics package and provides a suite of
675      new EXF diagnostics output.
676    
677    checkpoint57j_post
678    o exf
679      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
680        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
681        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
682      * extended diagnostics output
683        - now includes all EXF variables
684        - hs, hl moved to common block
685        - separate S/R for diagnostics, called after ctrl vector is added
686        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
687        - EXFqnet contains true Qnet (i.e. includes qsw)
688      * updated verif. lab_sea, global_with_exf
689      * Rearranging hflux (exf_mapfields -> exf_getforcing)
690        to ensure that diagnostics sees a true EXFqnet
691    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
692    o diagnostics pkg: change pointers so that 1 diagnostic can be used
693      several times with different frequencies.
694    o mnc-ify the thsice package as requested by Daniel Enderton
695      - the monitor--MNC output needs work
696      - many attributes need to be added (most are currently blank)
697    o mnc-ify theaim_v23 package as requested by Daniel Enderton
698      - many attributes need to be added (most are currently blank)
699    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
700    o add Sadourny like discretization to the 4th.O vorticity advection scheme
701    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
702      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
703         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
704    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
705     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
706    
707    checkpoint57i_post
708    o Diagnostics package was changed: diagnostic allocation is now deactivated
709      by setting an empty file name in the namelist (used to be by setting 0 frequency)
710    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
711      add 1rst Order upwind vertical Shear.
712    o add a quick fix for A/B checkpointing in OFFLINE mode
713    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
714      end-run around the C/Fortran linking horror in eesup/src/timers.F
715    o added pkg/runclock: allows user to terminate run based on wall clock
716    o added non-hydrostatic scaling parameter: nh_am2
717    o pkg/my82: futile attempt to make results compiler-independent by adding
718      some "_d 0", etc. no effect.
719    o for mnc output, fill the 'T' coordinate var with myTime and create a
720      separate 'iter' variable for iteration count
721    o pkg/diagnostics:
722      add new capability: output of Global/Regional & per-level statistics ;
723      tested against monitor output (including land & thSIce) on various exp.
724    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
725    
726    checkpoint57h_done
727      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
728      data.diagnostics, data.gchem, data.ptracers) is done.
729    
730    o pkg/diagnostics: prepare for Global/Regional statistics.
731      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
732    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
733      and rename it: DIFFERENT_MULTIPLE
734    
735    checkpoint57h_post
736    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
737    o pkg/diagnostics: change output frequency, now in seconds (instead
738      of Nb of iterations). This requires to change data.diagnostics.
739    checkpoint57h_pre
740    
741    o in mnc, let the user create the output dir if both mnc_outdir_date
742      and mnc_outdir_num are false
743    o add fflags() to pkg/diagnostics which allows one to specify, on a
744      per-file basis, the file precision [default behavior is unchanged]
745    o added diagnostics to pkg/kpp, including computation of mixed layer
746      depth based on a temperature/density criterion
747    o updated verification/natl_box to test the new pkg/kpp diagnostics
748    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
749    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
750    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
751      not mnc -- this mistake was found by JMC and is now corrected
752    
753    checkpoint57g_post
754    o add Adams-Bashforth 3rd Order time stepping:
755      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
756      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
757    checkpoint57g_pre
758    
759    o make lambda[Theta,Salt]ClimRelax spatially varying
760      (default remains spatially uniform constant based on tau)
761    o added new control variables
762      * init. uVel, vVel, etanN
763      * lambda[Theta,Salt]ClimRelax
764    o separate masks used for ctrl_pack/unpack 'from write_grid' output
765      (suggested by G. Forget)
766    
767    checkpoint57f_post
768    o add parameter "baseTime" = model base time = time at iteration zero
769      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
770      account for baseTime shift
771    o move Coriolis arrays from PARAMS.h to GRID.h
772    checkpoint57f_pre
773    
774    o mnc-ifying the seaice package
775    o introduced an alternative length scale calculation for use in the limiting
776      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
777    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
778    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
779      as well as grad(vort3).  Made it compatible with both approximate form
780      for the cubed sphere and full form of these gradients.  Added flag
781      useFullLeith to select between approximate and full form.  
782    o add "d0" in getcon.F to reduce differences between compilers/platforms
783      update output.txt of exp. fizhi-gridalt-hs
784    o change port_rand funtion to allow to set the seed.
785    o fix obscure MNC bug involving conversion between reals and integers
786      - it caused no problems with certain (eg. gcc, ifc) compilers but the
787        new version is now more standards-compliant
788    o adjoint-related modifications
789      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
790      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
791      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
792    
793    checkpoint57e_post
794    o Adding eddy stress controls a la Ferreira et al.
795    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
796    
797    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
798      update output.txt of exp. fizhi-gridalt-hs
799    o add more "Z" dimensions and associated coordinate vars to MNC
800    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
801    o parameter calendarDumps: when set, approximate months (30-31 days) and years
802      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
803      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
804      months and years.  Requires pkg/cal.
805    o diagnostics: add pickup functionality
806      - off by default for backwards compatibility
807      - current version only uses MDSIO -- MNC will be added
808    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
809    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
810    
811    checkpoint57d_post
812    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
813    o modify verification/ideal_2D_oce so that it tests the creation of mnc
814      output from the diagnostics package
815    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
816    o make genmake2 more portable by using ".$FS" instead of ".f" for more
817      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
818    o add coordinate variables to the MNC output from the diagnostics package
819    o change MNC-flags default value: true when useMNC=TRUE
820    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
821      the ability (off by default) to read the grid information using MNC
822    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
823    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
824    o do snap-shot diagnostics at the middle of the time-interval (instead of
825      at the end).
826    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
827      new test for AIM with thSIce + slab-ocean
828    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
829    o move state variable diagnostics to the beginning of the time step ;
830      (note: still needs some work specially for snap-shot diagnostics)
831      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
832    
833    checkpoint57c_post
834    o Change testing option (-ieee) to get closer agreement between g77 & ifort
835    o generate new output.txt files on faulks with g77 & the new -ieee option
836    checkpoint57c_pre
837    
838    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
839      update output.txt of exp. global_ocean.90x40x15
840    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
841      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
842    o add saltFlux(+File) forcing capability with periodicExternalForcing
843    o allow to use pkg diagnostics for GM-Redi & ThSIce output
844    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
845    o improvements for the MNC output from DIAGNOSTICS:
846      - correct handling of the unlimitied dimension
847      - all dims now have associated coordinate variables
848      - variables located at U, V, and Corner ("Z") points are now written
849        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
850        *all* data points are output
851    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
852    o added pkg/seaice/seaice_monitor.F
853    o mdsio_readfield.F can now read files visible only to master MPI process.
854    o pkg/seaice: some test code for ice-modified ocean stress
855    o exf_getffields interpolation defaults to bilinear for all scalar forcing
856      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
857      spurious negative numbers for precipitation and humidity.  Will cause
858      some small numerical differences for integrations using pkg/exf/exf_interp.F.
859    o pkg/ctrl/
860      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
861        May be enabled via doPackDiag
862      *  introduce z-scaling of
863         + gradient (doZscalePack) and
864         + control (doZscaleUnpack)
865    o pkg/mdsio/
866      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
867      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
868    
869    checkpoint57b_post
870    o simplify options in diagnostics_fill arguments (remove weird combinations)
871    o fix MNC coordinate variables so that they now contain per-face index
872      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
873      general, EXCH2 grids are only aligned to a "local" coordinate system
874    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
875    o Implement instantaneous output within pkg diagnostics:
876      setting a negative frequency in data.diagnostics produces
877     "snap-shot" output (as opposed to time-average if freq > 0)
878    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
879      NOTE: change ptracer diagnostics name: use 2 characters to work with
880            more than 9 tracers. Add also diagnostics of advect & diffus flux.
881    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
882      becomes the coordinate variable for the 'T' dimension
883    o add CF-style coordinate variables to MNC
884      - just a first cut:  numbers are meaningless on the cubesphere and
885        missing along the T axis but otherwise it works!
886    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
887    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
888    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
889      this is based directly on what the model compute, so that the content of
890      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
891    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
892    o clean up build options files for SunOS, in particular
893      - remove -traditional from xmakedepend
894      - change -xarch=v9 to -xarch=native for f77
895      - restore use of make (not gmake)
896      - add CC=gcc if using g77
897    o changes per discussion of AM, JMC, & EH3 today:
898      - move redundant "grid" variables out of "state" -- in preparation of
899        creating proper CF-style coordinate variables and in recognition
900        that any/all grid variables can be easily copied (eg. w/NCO) from
901        the grid files into any of the other NetCDF files
902      - *always* output grid variables with MDSIO (this will eventually be
903        changed)
904      - output MNC grid file if useMNC is true
905    o every instance of _END_MASTER() has been found and replaced with
906      _END_MASTER( myThid ) in order to satisfy certain picky Sun
907      preprocessors
908    o re-arrange diagnostics pkg initialisation:
909     - allow each package to extend the available diagnostics list
910     - add some checking and fix small problems (multi-threaded, ...)
911     - new S/R diagnostics_fill (replace fill_diagnostics):
912       look through the short list of active diag. (instead of the long list)
913       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
914    
915    checkpoint57a_post
916    o this set of changes restores TAMC compatibility
917      tested for global_ocean.90x40x15 adjoint on trough
918      (what a pain)
919    
920    checkpoint57a_pre
921    o some modifs in tools/build_options for sunos
922    o call ctrl_pack for ctrl at end for optimcycle=0
923    
924    checkpoint57
925    o add horizontal bi-harmonic viscosity for vertical velocity
926      - new parameter viscA4W (defaults to viscA4)
927      - affects only non-hydrostatic code
928      - to be done: no-slip lateral boundary conditions
929    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
930    o implement Implicit Vertical advection for pTracers
931    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
932      (implemented also for implicit vertical diffusion & advection)
933    o OBCS: extend application of tracer open boundary conditions
934      to a strip beyond the boundary of width Olx/Oly
935    o add call monitor to TAF set of required calls (flow directives)
936      and include in natl_box_adjoint
937    o untangle a few ifdefs related to cost, ctrl, autodiff
938      untangel a few ALLOW_ECCO_OPTIMIZATION
939    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
940      (theta2, salt2 in ecco_cost_weights)
941    
942    checkpoint56c_post
943    o OBCS as control variables
944      - update ctrl_ad_diff.list, obcs_ad_diff.list
945      - remove balance of obcs controls from default
946      - fix index bug nobcs in ctrl_init
947      - fix dummy fields filen in ctrl_pack
948      - add dummy weights for obcs
949    o lsopt: comment out fort.94 output
950    o optim:
951      - remove unnecessary header files
952      - adjusted namelists
953      - add xerbla.F to Makefile
954    o exf:
955      - multiple modifications of exf_check_range
956      - unit change in exf_init_runoff from [m/year] to [m/s]
957    o mdsio:
958      - i/o-vector change debugLevel from debLevA to debLevB
959    
960    checkpoint56b_post
961    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
962      is called from DO_THE_MODEL_IO
963      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
964      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
965      - clean up PTRACERS_WRITE_TIMEAVE a little
966    o add another verification experiment that tests both the cfc-pkg and
967      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
968      reactive tendencies treated inline with regular timestepping
969    o testreport previously did a lousy job of comparing small numbers, so
970      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
971      implemented in the little c-progam tmp_cmpnum.c which is embedded in
972      testreport.
973    o ptracers_monitor: bug fix for MPI
974    
975    checkpoint56a_post
976    o GCHEM: finish reorganizating the package
977      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
978        (introduces another 3D-array for each passive tracer, but only if
979        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
980        gchemTendency is not needed because the timestep is done separately)
981      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
982      - GCHEM is now---more or less cleanly---separate from PTRACERS
983      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
984        so clear to me how that should be done in a general way.
985    o CFC: improve formatting of output in CFC_ATMOS
986    o PTRACERS:
987      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
988        that ALL experiments with ptracers enable can be checked. This makes
989        GCHEM_MONITOR obsolete.
990      - include a runtime parameter PTRACERS_monitorFreq that defaults to
991        monitorFreq
992      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
993    o add PTRACERS (PTR0[1-5]) to testreport output
994    o exf_check_range:
995      * default changed to .TRUE.
996      * will check values for niter0 if debLevA, every timestep if debLevB
997      * STOP in exf_check_range if 'out of range'
998      * range chosen generous to allow for potential extema
999      TBD: a version with stricter range
1000           permitted range would be runtime parameters
1001    o GMredi:
1002      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1003      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1004      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1005    o GCHEM:
1006      - move call to GCHEM_FORCING_SEP, so that it is now called before
1007        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1008      - introduced a useGCHEM runtime flag and applied it everywhere.
1009      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1010        this flag is now only visible within GCHEM-pkg routines.
1011      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1012        be replaced by a 3D array that is computed before thermodynamics; for
1013        this, the tracer ID iTracer had to be included into the parameter list
1014        of ptracers_forcing
1015      - set up forward_step to call gchem_forcing, that will replace
1016        gchem_forcing_int in ptracers_forcing
1017      - cleaning up
1018    o small cleaning of exch2: remove files that are also in eesupp/src
1019    
1020    checkpoint56
1021    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1022    o mnc: cleanup "full" files--fixes out-of-memory problem
1023    o ECCO-GODAE
1024      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1025      * fully merged and updated from SIO code
1026        windstress sign change affects
1027        - exf_inscal_[u/v]stress
1028        - sign of xx_tau[u/v] adjustments
1029        - signs in cost_scat
1030      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1031      * natl_box_adjoint updated and compressed
1032      * 2-level checkpoint switch added
1033        (tested in EXP. 1 of natl_box_adjoint)
1034      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1035    o SVD
1036      * first complete, non-hacked version for SVD calculations
1037      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1038        performed via direct access files admtlm_vector.it????
1039        (via ctrl_[un]pack)
1040      * optimcycle is used for ARPACK iteration counter
1041        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1042      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1043        and add linear transforms where necessary
1044      * controls are initial/final SST, SSS (can be extended; need to check
1045        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1046    o mdsio: filename info to both stderr, stdout
1047    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1048      from sign change
1049    
1050    checkpoint55j_post
1051    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1052      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1053    o add consistent build directories and .cvsignore files to verification
1054    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1055    o make all subroutines 30 or less characters in length for certain older
1056      compilers to work (a thorough search only turns up two routines in
1057      pkg/ptracers)
1058    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1059      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1060    
1061    checkpoint55i_post
1062    o change arrays for total vertical diffusivity (2.D if explicit,
1063      3.D if implicit) ; each ptracer uses its own background value.
1064    o added mnc/NetCDF output capability to ocn_compon_interf
1065      - added bits to verification/cpl_aim+ocn so that it can run on
1066        ITRDA and other clusters without the mpirun "-wd" option
1067    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1068      configuration
1069    o give MNC the ability to create additional files rather than
1070      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1071      - the default is just less than 2GB which is a practical limit
1072        on many systems
1073    o Compute the non-local term using either KPP vertical diffusivity (=default)
1074       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1075    
1076    checkpoint55h_post
1077    o add verification test "vermix"
1078    o remove all the *_ioinc flags and replace with the single global
1079      outputTypesInclusive flag
1080    o allow to set a vertical profile of vertical diffusivity for T & S
1081    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1082    o useMNC moved from data.mnc to data.pkg
1083    
1084    checkpoint55g_post
1085    o Renaming carbon AD experiments to comply with testreport conventions
1086    o Updating adjoint of Held-Suarez hs94.1x64x5
1087    o Fixing directives for non-ECCO forward_step, after ECCO directives
1088      have been fixed to avoid recomp. of do_oceanic_phys
1089      Works well for global_ocean.90x40x15,
1090      but recomp. issue remains for carbon
1091    o Updating adjoint output for natl_box_adjoint after
1092      pkg/ecco has been modified (see taga c55d_post)
1093    
1094    checkpoint55f_post
1095    o rename to timeave_init_fixed
1096    
1097    checkpoint55e_post
1098    o some delicate re-shuffle of store directives to avoid one
1099      extra call of do_oceanic_physics
1100      affects ecco_the_main_loop.F, do_oceanic_physics.F
1101      checkpoint_lev1_directives.h
1102    o NB: this may break global_ocean adjoint temporarily,
1103      but it is clear how to fix it. Will do later, need this now.
1104    
1105    checkpoint55d_post
1106    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1107    o ecco_cost_weights is modified to 1x1 runs
1108    o modifs to allow observations to be read in as
1109      single file or yearly files
1110    o enable to read exf forcing fields as either
1111      single file or yearly files (flag useExfYearlyFields)
1112    checkpoint55d_pre
1113    
1114    o switch between 2-level and 3-level checkpointing
1115    o add ability of MNC to write local and "partial" (eg. 2D slices where
1116      the full 3D field is never actually stored) arrays to NetCDF files
1117      with the correct (that is, the complete multi-dimensional) set of
1118      array indicies
1119      - used in mom_vecinv() to write the diagFreq output
1120      - tested (demonstrated) in verification/aim.5l_cs
1121    o further mnc-ification
1122      - add verification/lab_sea to the list with mnc setups
1123      - fix undefined mnc v-names in cd_code
1124      - add kpp to mnc output (both snapshot and timeave)
1125    o non-hydrostatic code
1126      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1127        in calc_gw.F
1128      - defaults to viscAh
1129      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1130        friction or Leith) in non-hydrostatic mode, as long as there is
1131        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1132    o pkg/cost
1133      extend simple cost functions to treat time mean quantities
1134      (T,U,V) via cost_accumulate_state from cost_tile
1135    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1136        be 2 times larger than the minimum size the advection scheme requires.
1137        now get a perfect conservation of salt in advect_cs test-exp (updated)
1138    o GGL90 (Gaspar's TKE mixed layer)
1139      - add horizontal diffusion of TKE, requires exchanges in
1140        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1141        default. In OPA there is no horizontal diffusion of TKE but the
1142        mixing coefficients are computed from a horizontal average of TKE of
1143        6 points or so. I think that diffusion has a little more physical
1144        justification.
1145      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1146        was in vain)
1147      - mask tke-variable in ggl90_init
1148    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1149    o fix biharmonic diffusion on CS-grid.
1150    o more obcs stuff
1151      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1152        for reading boundary values. This routine is called from
1153        obcs_prescribe_read
1154      - updated obcs_check
1155      - changed sponge layer relaxation parameter units for days to seconds
1156      - turned off sponge layer by default
1157      - changed argument list of OBCS_CALC to myTime+deltaTclock
1158      - fixed about 35 bugs in obcs_external_fields_load
1159    
1160    checkpoint55c_post
1161    o obcs stuff
1162      - new runtime flags useOBCSprescribe, useOBCSbalance
1163      - re-arranged obcs_calc
1164      - moved exf_getobcs to obcs_prescibe_read
1165        obcs_prescibe_read is called after ORLANSKI stuff
1166        and independent of it (executable can contain all).
1167      - updated obcs_check
1168      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1169        These may be necessary only if tangential velocities are
1170        prescribed at OB, not sure, needs testing.
1171    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1172      which simplifies the calls and passes the ifc check-bounds test
1173    
1174    checkpoint55b_post
1175    o add a 2D scalar, Z location, exchange_2 routine.
1176    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1177      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1178      affects advect_cs results (for the wrong reason): update output.txt
1179    o use a more standard discretization for biharmonic viscosity ;
1180     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1181      affects results of dome set-up: update output.txt
1182    o fix gad_advection.F (CubedSphere part), back to version 1.23
1183    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1184    
1185    checkpoint55a_post
1186    o merged code to
1187      * prescribe/read time-dependent open boundaries
1188        (works in conjunction with exf, cal)
1189      * sponge layer code for open boundaries
1190      * each boundary N/S/E/W now has its own CPP option
1191        (healthy for the adjoint)
1192    
1193    checkpoint55
1194    o up-to-date adjoint of previous breaks
1195      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1196      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1197      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1198      - carbon: * remove tr1-related adjoint verification
1199                * add ptracer as control variable
1200    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1201      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1202    
1203    checkpoint54f_post
1204    o in verification/carbin/ remove experiment related to
1205      ALLOW_PASSIVE_TRACER (array tr1 etc)
1206      code_ad/ input_ad/ results_ad
1207    
1208    o add two new packages
1209      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1210        + subject to optimization (memory)
1211      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1212        + subject to reordering (many GOTOs in the original code)
1213        + so far opps is called for every (i,j) point, and then operates in
1214          the vertical; one may want to reorder the scheme in order operate in
1215          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1216          fields)
1217    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1218      - all verification tests compile and run with linux_ia32_g77
1219      - defaults are compatible with current input files--nothing
1220        should change if you were not previously using MNC
1221      - MNC output has been added in numerous places (eg. timeave)
1222        but there are still a few writes not yet do-able with MNC
1223        (this is in progress)
1224      - flags now allow for either/or/both use of MDSIO and MNC and
1225        documentation will soon follow
1226      - numerous small formatting cleanups for ProTeX
1227    o add version info (via BUILD_INFO.h) to MNC and stdout
1228    
1229    checkpoint54e_post
1230    o add two new packages
1231      - pp81 (Packanowski and Philander, 1981), Richardson number and
1232        stratification dependent mixing
1233      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1234      - these scheme operate in a similar manner as KPP (without ghat, of
1235        course), however there is only one diffusivity that is used for both
1236        temperature and salinity (and passive tracers)ç
1237    o add offline package
1238    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1239      provided by Stephanie Dutkiewicz
1240    o genmake2: add ability to search for C compilers and cleanup test output
1241      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1242    
1243    checkpoint54d_post
1244    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1245    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1246      leading to additional shift by 5 days each year of integration
1247       (i.e. leading to considerable offset over the years)
1248    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1249    o start with no AB and no initial filtering (staggerTimeStep):
1250      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1251    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1252      (external loading & cpl import/export stay in forward_step.F)
1253    o update coupling interface to work with new staggerTimeStep
1254    o change MDSIO ptracers_pickup.
1255    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1256    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1257    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1258    
1259    checkpoint54c_post
1260    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1261      this affects (truncation error) output.txt of test-exp:
1262       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1263    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1264    o change Qnet to always be the net heat flux, (+upward).
1265      affects (truncation error) output of natl_box exp.: updated
1266    o define the max number of passive tracers in PTRACERS_SIZE.h
1267    o start to test mnc routinely in exp0
1268    o add sea-ice loading (sIceLoad) as a new forcing field.
1269    
1270    checkpoint54b_post
1271    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1272       impressive on Altix and Opteron systems)
1273    o diagnostics can now write NetCDF files through the mnc package
1274    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1275    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1276    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1277      affects (truncation error) output of lab_sea & natl_box exp.: updated
1278    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1279    
1280    checkpoint54a_post
1281    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1282    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1283    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1284    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1285      + internal_wave (shift in writing cg2d_ini_res)
1286    checkpoint54a_pre
1287    
1288    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1289      - modified verification/lab_sea and natl_box_adjoint accordingly
1290    
1291    checkpoint54
1292    checkpoint53g_post
1293    o prepare splitting of thermodynamics: store convect.counter in common block
1294    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1295      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1296    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1297    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1298    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1299    o restore adjointability
1300    
1301    checkpoint53f_post
1302    o modifications that affect AIM experiment results (update output.txt):
1303      - no advection of S at top interface Nr (pkg/generic_advdiff)
1304      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1305    o AIM pkg:
1306      - include stability function into surf.Flux derivative relative to Tsurf
1307      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1308    
1309    checkpoint53e_post
1310    o merged cylindrical coord configuration
1311    o added rotating_tank experiment
1312    checkpoint53e_pre
1313    
1314    checkpoint53d_post
1315    o faulks upgraded: re-generate output.txt that have changed:
1316       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1317    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1318    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1319    o added Sadourny discretization of Coriolis
1320      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1321      - re-enabled use of omega3 (useAbsVorticity)
1322    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1323      vector-invariant equations
1324      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1325    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1326      hopefully without new bugs
1327      - still to do: biharmonic friction for non-hydrostatic w
1328    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1329    o regenerated output for global_ocean_ebm (using -ieee)
1330    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1331      of mom_common/
1332      - simple re-arrangement of instructions within computing loop
1333    checkpoint53d_pre
1334    
1335    checkpoint53c_post
1336    o new version of coupler for AIM+thSIce and Ocean models
1337     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1338     - land: change Evaporation of snow
1339     - aim with thSIce: fix bug in snow-precip.
1340    o changes to calc_gw.F
1341     - bug fix for w^2 term near the bottom boundary
1342     - (hopefully) improve the lateral slip boundary condtions for use with
1343        partial/looped cells
1344      - because the bug fix changes two verification experiments anyway (exp5
1345        and plume on slope), change the lateral boundary condition from half slip
1346        to the value of no_slip_sides
1347    o ebm package wasnt quite up to the parallel task. Fixed that.
1348    o Adjoint of EBM package + verification
1349      * TLM OK
1350      * ADM not sufficient accuracy yet (needs further testing)
1351    
1352    checkpoint53b_post
1353    o Commiting new energy balance model to repository
1354      * package is pkg/ebm
1355      * verif. is verification/global_ocean_ebm
1356      * references are in ebm_driver.F
1357    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1358    C        Global thermohaline circulation. Part I:
1359    C        Sensitivity to atmospheric moisture transport.
1360    C        J. Climate 12(1), 71-82
1361    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1362    C        Global thermohaline circulation. Part II:
1363    C        Sensitivity with interactive transport.
1364    C        J. Climate 12(1), 83-91
1365    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1366    C        Destabilization of the thermohaline circulation
1367    C        by atmospheric eddy transports.
1368    C        J. Climate 7(12), 1870-1882
1369    o Will need long integration testing.
1370    checkpoint53b_pre
1371    
1372    o created pkg/mom_common in preparation for variable viscosity code
1373    o renamed and split ini_mnc_io
1374    o pkg/land: only liquid water can diffuse or run-off
1375    o AIM using land: soil wetness availability account for snow
1376    o added printMapIncludesZeros to EEPARMS namelist
1377    
1378    checkpoint53a_post
1379    o restore TAMC compatiility for exf_constants.h
1380      (no usage of _d in .h)
1381    o Additional storing in KPP in an attempt to fix
1382      TAMC problem with adjoint of KPP code.
1383      (no success...)
1384      Identical code works fine with TAF.
1385    o Fixed verification/natl_box_adjoint experiments.
1386      Initial conditions for Experiments 4 and 5 are now
1387      set to "SEAICE_initialHEFF=0", which is more reasonable,
1388      and hence gives results closer to that of Experiment 2.
1389      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1390    
1391    checkpoint53
1392    o stable checkpoint with up to date adjoint
1393      TLM tests only run for 1st grdchk at the moment. Its unclear if
1394      this is a code problem or a problem with resetting code for g_
1395      variables that is being autogenerated wrong.
1396      Otherwise:
1397       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1398       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1399         are both still in chaos following their security messes.
1400    
1401    checkpoint52n_post
1402    o various build (mostly genmake2) changes including:
1403      - ability to build/run more easily within Cygwin and MacOS X
1404      - more complicated Makefiles with a stronger dependence on Gnu Make
1405    o pkg/seaice modifications
1406      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1407        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1408        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1409      - changed proxy for geostrophic velocity and updated
1410        verification/lab_sea/results/* accordingly
1411      - removed ADI dynamic solver from pkg/seaice
1412      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1413        they caused a segmentation fault under certain circumstances
1414      - removed unused field WATR
1415    o bug fix in exf-package:
1416      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1417         now reflect that.
1418    o small fixes in the cal-package:
1419      - set reference date to first of January for the 'model'-calendar
1420      - failing of cal_CheckDate in cal_FullDate now actually results in a
1421        warning
1422    o small modifications in exf-package to increase flexibility:
1423      - change climtempfreeze from a constant to a runtime parameter that
1424        is specified in data.exf_clim (default = -1.9)
1425      - introduce runtime parameter windstressmax (default = 2.0) that is
1426        specified in data.exf
1427    o fix in pkg/thsice:
1428      - update Evap (Tsf changes) to be consistent with Latent heat flux
1429      - maintain snow precipitation unchanged (even if Tsf >=0).
1430     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1431    
1432    checkpoint52m_post
1433    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1434      this does not change any of the results, because myIter=0 in swfrac always
1435      lead to jwtype=2 (the default anyway), but the call makes little sense
1436      as a default
1437    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1438    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1439      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1440    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1441    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1442    o extending useSingleCpuIO option to work with new exch2 I/O format
1443      - old-style, missing-tile I/O is still accessible by defining CPP
1444        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1445    o monitor package can write to NetCDF files and/or STDOUT
1446    o fix re-definition bug in MNC_GRID_INIT_ALL()
1447    o doc/api_reference added
1448      - a framework for building an API Reference Manual using all
1449        the "protex" comments embedded in the code
1450      - see pkg/generic_advdiff, pkg/mnc for examples
1451    o MNC:
1452      - make myThid the last argument for all subroutines
1453      - new default for the grid files: NO halos
1454      - add useMNC and other run-time flags
1455      - separate per-file-group handling of the unlimited dimension
1456      - early initialization of MNC w/ flags read at the eeboot stage
1457        and lookup tables set in initialize_fixed
1458      - write all MNC output to a freshly-created directory
1459    o thermodynamics sea-ice (thsice) is now tested with testreport.
1460    o test exp. advect_cs: use the standard cs32 grid ; update output.
1461    o Added functionality to grdchk:
1462      pick global i,j,k position (or nearest wet) where to perform check.
1463    
1464    checkpoint52l_post
1465    o new land formulation:
1466      a) use ground enthalpy as prognostic variable to ensure exact
1467         energy conservation.
1468      b) account for water temperature and for latent heat of freezing
1469         in all processes (rain, run-off, ground storage)
1470      c) compute surface and ground temperature implicitly.
1471    o aim_v23 modification for new land model:
1472      a) Treat separately land / ocean / sea-ice surface fluxes
1473         to allow implicit computation of land & sea-ice surface temp.
1474      b) add snow precipitation.
1475    checkpoint52l_pre
1476    
1477    o fix problem (when 1 tile is empty) in min/max monitor.
1478    o fix bug in timeAve (u,vZetatave in common block)
1479    o no restoring terms under ice for pkg/seaice
1480    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1481    o bug fix for pkg/seaice pickups
1482    o change MNC call locations and add coordinate attributes
1483    o mask vorticity at the corner ; affects global_ocean.cs output
1484    o fix ini_curvilinear_grid ; test CS experiments with mpi
1485    o aim.5l_cs: modify sea-ice fraction input file ; update output
1486    o exf: Adding simple range check routine for exf fields after read
1487    
1488    checkpoint52k_post
1489    o removed top-level directory "diags"
1490      - we migrated these functions to pkg/timeave a long time ago
1491    o fixed bug introduced in pkg/monitor
1492    o accuracy ctrlprec = 32 insuffient for gradient checks using
1493      averaged fields (I/O via cost_averages)
1494      -> use ctrl.h in active_file*.F to control I/O precision.
1495    o paramter list of CALL ADTHE_MAIN_LOOP
1496    o added initial do_the_model_io to ecco
1497    o set all ...Freq to zero after cost_final
1498      taveFreq, dumpFreq, pChkptFreq
1499    o MAIN and ECCO differentiability restored
1500    
1501    checkpoint52j_post
1502    o fix nchklev in tamc.h for global_ocean...
1503    o Bringing flow and store directives up-to-date
1504    o Really weird thing!
1505      call do_the_model_io from the_main_loop with parameters
1506      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1507      TAF places a faulty re-call of initialise_varia
1508      after cost_final call which should not be there!
1509    checkpoint52j_pre
1510    
1511    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1512      error messages
1513    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1514    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1515      debug output
1516    o modfied mdsio_writefield.F to handle non-global files under exch2
1517    o update AIM Cubed-Sphere exp (aim.5l_cs):
1518      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1519    o update AIM Equatorial Channel exp:
1520      use standard aim_v23 pkg and change the SST fields to be more realistic.
1521    o globalFile now works with exch2
1522    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1523      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1524    o limit timeave output for hi-res integrations
1525    
1526    checkpoint52i_post
1527    o removed CPP_EEOPTIONS.h from verification/*/code
1528    o updated the tiling for global_ocean_pressure
1529    checkpoint52i_pre
1530    
1531    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1532      the old pkg/aim).
1533    
1534    checkpoint52h_pre
1535    o shortened offending lines in exch2_send_rx?.template
1536    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1537    o genmake2: add build & execute test for NetCDF code
1538    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1539      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1540    o added useSingleCPUIO flag to monitor.F and mon_out.F
1541    o added temporary hack for sea-ice dynamics on the cube:
1542      metric terms are ignored and it is assumed that
1543      there is no sea-ice on cube faces 1, 2, 4, and 5.
1544    
1545    checkpoint52f_post
1546    o added exch2 cube routines to pkg/exch2
1547    o modified hs94.cs-32x32x5 to use it
1548    o added new grid files to hs94.cs-32x32x5
1549    checkpoint52f_pre
1550    
1551    checkpoint52e_post
1552    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1553      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1554    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1555      to work with implicit vertical advection and AB ;
1556    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1557    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1558     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1559    checkpoint52e_pre
1560    
1561    o fix bug in impldiff when Nr=1 or Nr=2.
1562    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1563    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1564    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1565      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1566    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1567    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1568    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1569    
1570    checkpoint52d_post
1571    o re-tiled many expts to allow comparison in multi-processor mode
1572      - updated output accordingly
1573      - changed hs94.128x64x5 to use intial T from file rather than use the
1574        random number generator
1575    o add infrastructure in model routines for fizhi and gridalt packages
1576    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1577    o changes to permit hi-res, cubed-sphere, configuration
1578      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1579      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1580      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1581        of surface winds for the cube
1582      (A verification experiment, based on global_ocean.cs32x15, but with
1583       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1584       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1585       complete with example surface forcing files and matlab scripts to look
1586       at the output and compare it with that of global_ocean.cs32x15.)
1587    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1588       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1589       to conform to the common rule.
1590    o check-in the first version of the coupler + interfaces for multi-components
1591       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1592       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1593       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1594       - ocean and atmos. share the same horizontal grid (no interpolation).
1595       - exchanges between component and coupler is done in forward_step
1596    o new verification experiment, cpl_aim+ocn:
1597       coupled ocean - AIM atmosphere on cs32 grid.
1598    
1599    checkpoint52d_pre
1600    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1601    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1602    
1603    checkpoint52c_post
1604    o Fixing OPTIONS files for use of exf:
1605      - ALLOW_ECCO not needed
1606      - ECCO_CPPOPTIONS.h should not be included from
1607        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1608        as has been the case in the past
1609      - All cal/exf related options are currently set in
1610        single header file. Should remain so until we
1611        agree on a consistent new policy.
1612    o Removed all CPP options for cal package.
1613      cal has no more CPP options.
1614    o modified STOREs in GAD_ADVECTION
1615    o corrected key comp. for passkey
1616    
1617    checkpoint52b_post
1618    o new version: "thsice" of thermodynamic sea-ice pkg:
1619     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1620     - modify fluxes but do not change theta directly;
1621     - light cleaning of bulk_force pkg (still needed with thsice).
1622     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1623       + output_thsice.txt to test thsice & bulk_force pkgs.
1624    o put back grid & coriolis monitor output.
1625    checkpoint52b_pre
1626    
1627    o call "do_the_model_io" at the beginning (=> dump initial state)
1628    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1629    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1630      (need info on NUMBER_OF_PTRACERS)
1631    o missing PTRACERS headers in some routines
1632    o default tamc.h in pkg/autodiff supposed to crash
1633      to ensure proper customization
1634    
1635    checkpoint52a_post
1636    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1637      - moved surfaceTendencyTice from pkg/seaice to main code
1638      - subroutine FREEZE_SURFACE now limits only surface temperature
1639        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1640        => new output.txt for global_ocean.cs32x15 & global_with_exf
1641      - keep the old version of FREEZE for backward compatibility;
1642        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1643      - corresponding modifs for TAF directives
1644    o added surface flux output variables to TIMEAVE_STATVARS
1645    o time-averaged output for pkg/ptracers
1646    o fix problem with ECCO-related divided adjoint
1647      snapshot file was missing some ad-variables,
1648      but no warning issued by TAF
1649    
1650    checkpoint52a_pre
1651    o some bug fixes for #undef REAL4_IS_SLOW
1652    
1653    checkpoint52 = ecco_c52_e35
1654    o after testing adjoints of checkpoint51u_post
1655    
1656    checkpoint51u_post
1657    o this is the post-merge tag of the ecco-branch
1658      (needs another clean checkout and re-testing)
1659    o various natl_box_adjoint configs and results
1660      but no input fields
1661    o obcs adjoint not yet merged!
1662    o adding ECCO global 1x1 and 2x2 degree configs
1663    o updated/extended some store directives for seaice
1664    o pkg/ecco now containes ecco-specific part of cost function
1665    o top level routines the_main_loop, forward_step
1666      supersede those in model/src/
1667      previous input data.cost now in data.ecco
1668      (new namelist ecco_cost_nml)
1669    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1670    
1671    checkpoint51t_post
1672    o this is the pre-merge tag of the ecco-branch
1673    
1674    checkpoint51s_post
1675    o cleanup: removed various obsolete #define-s
1676    o pkg/grdchk
1677      - renamed 'ph-grd 3' to 'grad-res'
1678      - merged from ecco-branch
1679        (remaining bug fixes for obcs gradient checks)
1680      - additional high-precision output for testreport
1681        (grep for 'precision_grdchk_result')
1682    
1683    checkpoint51r_post
1684    o cleaned up or removed CPP_OPTIONS.h files
1685    o updated results for some of the tests to reflect the new
1686      optfiles (-ieee: -O0 instead of -O3)
1687    
1688    checkpoint51q_post
1689    o cd_code:
1690      - moved cd_scheme.F -> cd_code_scheme.F
1691      - separate read_checkpoint from cd_code_ini_vars.F
1692      - separated cd_code part from write_checkpoint
1693      - updated AD_SOURCE, generated .flow
1694      - added CD_CODE_VARS.h to the_main_loop
1695      - Moving cd_code specific store dir.s to pkg/cd_code
1696    o ctrl package totally restructured
1697      - pack/unpack now optional and decoupled from
1698        xx_/adxx_ I/O
1699      - ctrl_pack/unpack cleaned
1700        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1701      - confined inclusion of AD_CONFIG.h to where necessary.
1702    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1703    
1704    checkpoint51p_post
1705    o create initial cd_code package
1706      - WARNING: the initialization of fields within packages
1707        is broken because INI_FIELDS (where READ_CHECKPOINT is
1708        called) is called *before* PACKAGES_INIT_VARIABLES.
1709        This seems to be backwards since
1710        1) its important to initially zero the entire field including
1711           the "halo" region
1712        2) zeroing needs to be done *before* reading pickup info
1713           and the pickup call might or might not happen in any
1714           particular run
1715      - this needs an overhaul for R2
1716    o cleanup verification/*/code/GMREDI_OPTIONS.h
1717    o cleanup testreport
1718    
1719    checkpoint51o_post
1720    o bringing AD-related verif's up to date with genmake2
1721      - carbon/
1722      - global_ocean.90x40x15/
1723      - hs.94.1x64x5/
1724      - (front_relax/ )
1725    o (more) consistent directory structure for AD-related verif.'s
1726    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1727    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1728    o bug fix in find_alpha.F for MDJWF:
1729      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1730        change rho -> rho-rhoConst
1731      - replace call find_rho to find_rhonum
1732    o initialisation of rFlx extended to full array (required by TAF)
1733      and shifted to thermodynamics
1734    o removed PTRACERS.h in ptracers routine
1735    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1736    o Correcting initialisations for fVerU, fVerV.
1737    o helping TAF to recognize dependency on kUp for
1738      fVerU, fVerV
1739    o Replacing delZ by delR in pkg/ctrl/
1740    checkpoint51o_pre
1741    
1742    o undid all of cp51 pending some cleanups and discussion
1743    o added the [#include "AD_CONFIG.h"] statement to all files that need
1744       it for adjoint/tl #defines
1745     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1746     o removed tools/genmake since it no longer works
1747    
1748    checkpoint51n_post
1749    o modifications to make FREEZE flux visible to pkg/kpp
1750      - moved surfaceTendencyTice from pkg/seaice to main code
1751      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1752      - subroutine FREEZE now limits only surface temperature
1753        (this means new output.txt for global_ocean.90x40x15,
1754         global_ocean.cs32x15, and global_with_exf)
1755    o added surface flux output variables to TIMEAVE_STATVARS
1756    
1757    checkpoint51n_pre
1758    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1759    o added [#include "AD_CONFIG.h"] to all files that use the following
1760      defines:
1761      - ALLOW_ADJOINT_RUN
1762      - ALLOW_TANGENTLINEAR_RUN
1763      - ALLOW_ECCO_OPTIMIZATION
1764    
1765    checkpoint51m_post
1766    o incorporating changes to get TAMC/TAF working in genmake2
1767      - added new TAMC/TAF targets to the Makefile
1768      - various cleanups related to package handling
1769      - these changes should have no impact on the forward model
1770    
1771    checkpoint51l_post
1772    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1773     - faster algorithm for cal_addtime.F
1774     - higher precision arithmetic, where needed
1775     - pkg/exf *startdate variables changed from calendar date to
1776       model integration time
1777    
1778    checkpoint51l_pre
1779    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1780    o enable to apply restoring on S & T only in a latitude band.
1781    o update output (external_forcing_surf modif. change truncation errors)
1782       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1783    
1784    checkpoint51k_post
1785    o change default to: useNHMTerms=.FALSE.
1786     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1787       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1788     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1789        exp1, ideal_2D_oce
1790     - change data file of oceanic exp (leave the results unchanged for now)
1791       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1792    o set gravitySign automatically according to the vertical coordinate used
1793      (and change sign: back to "logical" value: +1 when R increases downward)
1794    o added an include barrier to the default CPP_OPTIONS.h and
1795      removed the #include "PACKAGES_CONFIG.h" from it
1796    o fix a bug in mom_fluxform (from chk51j_post)
1797    
1798    checkpoint51j_post
1799    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1800    o adjusted some flow directives (dynamics, thermodynamics)
1801    o added cubed-sphere case to test cost function
1802    o heckpoint_lev?_directives.h now include
1803      pkg-specific directives, whenever those are enabled.
1804    o Moving pkg-specific flow directives to corresponding pkg
1805      Moving pkg-specific differentiation list to corresponding pkg
1806      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1807      ---> conventions are
1808           - pkg_ad.flow
1809           - pkg_ad_diff.list
1810           - pkg_ad_check_lev?_dir.h
1811    
1812    checkpoint51i_post
1813    o merge of the branch-genmake2
1814      - knowingly breaks the older genmake
1815      - automatic generation of all ALLOW_${PKG_NAME} defines
1816      - new testreport supersedes older testscript
1817    o large number of package inclusion and header cleanups
1818    checkpoint51i_pre
1819    
1820    o new output for adjoin of global ocean vector invariant
1821    o fix for checkpoint of thermodynamic seaice and bulk_force
1822    o Steph gchem various cleanups
1823    
1824    checkpoint 51h_pre
1825    o fixed some single quotes
1826    o modify gchem pkg to be more versatile
1827    o modifications to clean up dic pkg
1828    o add pkg/cfc
1829    
1830    checkpoint51g_post
1831    o provide links for ARPACK and ADM*TLM
1832    o start removing verification/vero/
1833    o update AD-related stuff
1834      (in particular some IF-statements in model/src/ routines)
1835    o adding to verification/global_ocean.90x40x15/ adjoint of
1836      vector invariant setup
1837    
1838    checkpoint51f_post
1839    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1840    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1841      of tracer Green's fucntions for ocean inversion project.
1842    
1843    checkpoint51f_pre
1844    o Added on-the-fly spatial interpolation capability
1845        "USE_EXF_INTERPOLATION" to pkg/exf.
1846      - This is a temporary Cartesian-grid hack until
1847        the super-duper ESMF coupler becomes available.
1848      - See verification/global_with_exf/README for usage example.
1849      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1850        flags and modified pkg/seaice accordingly.
1851    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1852        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1853        non-local transport term.
1854    
1855    checkpoint51e_post
1856    o pkg/mom_vecinv:
1857      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1858      - add time-ave diagnostic of vorticity advection.
1859    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1860    o atmospheric geopotential: - include water vapor effect;
1861                                - use p^kappa in p* scaling.
1862    o land pkg: read initial state from files.
1863    o AIM : add stratospheric drag in the upper level
1864    
1865    checkpoint51d_post
1866    o change function ILNBLNK (=> last non-blank char.) to return zero
1867      (instead of the string length) when the string. char is empty
1868    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1869    o modif's to restore TAMC compatibility
1870      - avoid "_d" constructs in PARAMETER declarations
1871      - avoid interrupting lines by comment lines
1872    o Use cluster local disks for purely local I/O
1873      vs. globally visible disks needed for ctrl stuff
1874      (merged from ecco-branch)
1875      - new active_file_loc... and mdsio_..._loc routines
1876      - affected packages: autodiff, ctrl, grdchk, mdsio
1877    
1878    checkpoint51c_post
1879    o introducing integer flag debugLevel
1880      - debLevZero: suppress all output
1881      - debLevA: standard
1882      - debLevB: equivalent to current debugMode=.TRUE.
1883    o introducing pathname variable mdsioLocalDir for mdsio
1884      that can be specified at runtime
1885      (relevant for cluster I/O to local disk)
1886    `
1887    >>>checkpoint51b_post
1888    adjoint of ptracers
1889    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1890    o extended state in checkpoint_lev?, etc.
1891    o alternative ctrl/cost with tr1 or ptracer
1892    o new comlev1_bibj_ptracers
1893    o new ptracers.flow
1894    o made ptracers_forcing same as external_forcing_s
1895    o added verification for adjoint with ptracers
1896      - adm. grdchk fail so far
1897      - tlm. grdchk OK
1898      - checked tapelev/comlev recomputations: OK
1899    <<<checkpoint51b_pre
1900    
1901    checkpoint51a_post
1902    o added code for biogeochemistry package
1903      - new pkgs: dic, gchem
1904      - new subroutine in ptracers
1905    o modify code for biogeo packages
1906      - in model/src and pkg/ptracers
1907    
1908    checkpoint51
1909    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1910      - autodiff, ctrl, exf, grdchk, seaice
1911      kept separate packages
1912      - cost, ecco, obcs
1913    o updating verification/internal_wave, verification/lab_sea
1914      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1915    
1916    checkpoint50i_post
1917    o Preparing next differentiable checkpoint and sync
1918      of MAIN vs. ecco-branch
1919      - 1st step: this one is differentiable
1920      - 2nd step: next(! not this) checkpoint will have updated packages
1921                  from ecco-branch)
1922    
1923    checkpoint50h_post
1924    o new package "land": provide surface BC for AIM.
1925    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1926    o AIM: use true log-P extrapolation for near surface temp (= as in
1927        F.Molteni paper) ; update aim.5l_cs output.
1928    o New variable in PARM03 for more flexible pickups
1929    o somewhat cleaned package initialisation sequence for
1930      ctrl/ cost/ ecco/ in packages_... routines
1931    
1932    checkpoint50g_post
1933    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1934      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1935      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1936        made the default because of faster convergence than ADI
1937    
1938    checkpoint50f_post
1939    o exf totally restructured
1940      - replaced all exf_set_ routines by one generic exf_set_gen.F
1941        and made sure it's still differentiable
1942      - split exf_getffields.F into new exf_bulkformulae.F
1943      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1944      - updated adjoint/makefile and relevant verif. accordingly
1945    
1946    checkpoint50f_pre
1947     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1948          + change Evap over land. (update aim.5l_cs output)
1949     o added missing .cvsignores and made uniform across expts
1950     o changed configuration of tidal_basin_2d expt
1951     o added pkg/debug functions for tracing code in fatal crashes
1952     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1953     o new fn in pkg/monitor to stop model if solution grows too big
1954     o removed lots of single quotes from comments
1955    
1956    checkpoint50e_post
1957    o make KPP work with PTRACERS
1958     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1959       nearly a copy of kpp_transport_s
1960     - there is no analogue to SurfaceTendencyS, so I have to use
1961       gPtr(of the surface layer) instead
1962    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1963    checkpoint50e_pre
1964    
1965    checkpoint50d_post
1966    o change kpp output from multiple-record state files to single-record state
1967      files analogous to write_state.F
1968    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1969      analogous to the cg2d-related output.
1970    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1971      so that writing to internal file fn (with length 512) fails.
1972    checkpoint50d_pre
1973    
1974    checkpoint50c_post
1975    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1976    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1977    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1978    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1979    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1980    
1981    checkpoint50c_pre
1982    Merging from release1_p13:
1983    o bug fix for pkg/seaice dynamic solver
1984    o Added SEAICE_initialHEFF to pkg/seaice
1985    
1986    checkpoint50b_post
1987    o store u*,v* in gU,V instead of in guNm1,gvNm1
1988    o in order to put the momForcing out of the Adams-Bashforth:
1989      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1990      to timestep.F
1991    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1992    o re-generate output for highly sensitive test-exp:
1993       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1994    
1995    checkpoint50b_pre
1996    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1997    o corrected CPP option mismatch in exf_Bulk... functions for case
1998      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1999    
2000    checkpoint50a_post
2001    o Bug fix for merging between c50 and KPP.
2002      ikey was passed from thermodynamics to kpp_calc via
2003      common block rather than being recomputed in kpp_calc,
2004      in contradiction with new key itdkey.
2005      New key ikppkey created, and tamc.h headers updated.
2006    
2007    checkpoint50
2008    - 2nd step of merge with ecco-branch:
2009      merge changes in ecco-branch back into main trunk
2010    - bug fix in find_alpha
2011    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2012    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2013    - merged some sliced AD support routines
2014    
2015    checkpoint49
2016    merged from ecco-branch:
2017    o exf:
2018      - Enable initialisation of forcing fields to constant
2019        (runtime) values.
2020      - in exf_getffields.F
2021        Reduce i-/j-loop to interior domain, discarding overlaps.
2022        That also fixes wrong TAF-key computations for key_1, key_2
2023        with bulf formulae.
2024      - exf_init.F modify #ifdef for exf_init_evap
2025      - exf_getffieldrec.F, ctrl_getrec.F
2026        The following INT-usages are not safe:
2027          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2028          fldcount = int(fldsecs/fldperiod) + 1
2029        and were modified.
2030    o autodiff: checkpoint_lev...
2031      - updated storing for bulk formulae (some arrays were missing)
2032      - added state for seaice package
2033      - synchronized with main branch
2034    o DIVA:
2035      Modif.s in
2036      - the_main_loop.F
2037      - the_model_main.F
2038      and added cost_final_restore.F cost_final_store.F
2039      o With these changes, it is possible to fully separate
2040        the first forward run to compute the cost function (mdthe_main_loop)
2041        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2042        into separate model executions.
2043        This enables better tuning of DIVA to given queue sizes.
2044      o Loss of cost function value in consecutive DIVA runs is
2045        fixed by storing to 'costfinal' file.
2046      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2047        beginning/end of adjoint integration is accounted for.
2048      The current changes apply to TAF-1.4.26.
2049      TAF has one remaining bug, requiring one manual change
2050      (see MITgcm manual).
2051    o cal: synchronized between MAIN and ecco-branch
2052    
2053    checkpoint48i_post
2054    o Changes to restore differentiability of code w.r.t. previous tag
2055      (mostly adding new routines to make list and replacing
2056      pressure by totPhiHyd).
2057    o Updated and merged grdchk package
2058      - has both ADM and TLM checks
2059      - works for single- and multi-proc.
2060      - output cleaned
2061      - worked successfully for parallel DIVA
2062    o genmake:
2063      - Adding -platform=SP4
2064      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2065    o Modif. for DIVA:
2066      ctrl_unpack should not be called in intermediate DIVA interval.
2067      (similar thing would apply for active files such as
2068      tbar, sbar, psbar, which should not be reinitialised;
2069      only relevant for ecco-branch)
2070    
2071    checkpoint48h_post
2072    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2073    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2074    o Added SEAICE_initialHEFF to pkg/seaice
2075    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2076    
2077    checkpoint48g_post
2078    --- EOS:
2079    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2080      store total Potential in totPhyHyd for diagnostics & EOS.
2081    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2082    --- Pressure/geopotential gradient:
2083    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2084    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2085      ( changes results of global_ocean_pressure )
2086    o NLFS + z-coord.: add eta*Rho' contribution.
2087    o accurate phiHyd when using interface-W at the middle between 2 centers
2088     ( changes results of ideal_2D_oce )
2089    o includes r* 2nd term in potential gradient.
2090    
2091    checkpoint48f_post
2092    Merging from release1_p12:
2093    o Modifications for using pkg/exf with pkg/seaice
2094      - improved description of the various forcing configurations
2095      - added basic radiation bulk formulae to pkg/exf
2096      - units/sign fix for evap computation in exf_getffields.F
2097      - updated verification/global_with_exf/results/output.txt
2098    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2099      (SBO) core products, including oceanic mass, center-of-mass,
2100      angular, and bottom pressure (see pkg/sbo/README.sbo).
2101    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2102      to avoid negative values in shallow regions.
2103      - updated verification/natl_box/results/output.txt
2104      - updated verification/lab_sea/results/output.txt
2105    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2106    o Added useSingleCpuIO option (see PARAMS.h).
2107    o Updated useSingleCpuIO option in mdsio_writefield.F to
2108      work with multi-field files, e.g., for single-file pickup.
2109    o pkg/seaice:
2110      - bug fix in growth.F: QNET for no shortwave case
2111      - added HeffFile for specifying initial sea-ice thickness
2112      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2113    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2114      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2115    o pkg/seaice:
2116      - adjoint-friendly modifications
2117      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2118    
2119    checkpoint48e_post
2120    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2121    o dynamics: change definition of computational domain & adapt mom_fluxform
2122      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2123    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2124        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2125        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2126        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2127        inverted_barometer solid-body.cs-32x32x1
2128      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2129    
2130    checkpoint48d_post
2131    o in preparation for r*:
2132     a) use pre-computed gradient of hydrostatic potential:
2133        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2134     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2135        => affects results of glob_oce_pressure (different truncation error)  
2136      update output.txt of ideal_2D_oce & global_ocean_pressure
2137    
2138    checkpoint48d_pre
2139    o in preparation for r*:
2140      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2141      pass the 2 comp. of the grad. as arguments to momentum S/R.
2142      but for the moment, only used if it does not change the results.
2143    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2144    
2145    checkpoint48c_post
2146    Modifications in treatment of initial flux forcing controls
2147    to avoid extra storing of flux fields.
2148    
2149    checkpoint48c_pre
2150    o Added tidal_basin_2d experiment (currently 1D!)
2151    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2152    
2153    checkpoint48b_post
2154    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2155     (modification to pressure gradient not yet implemented)
2156    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2157      (for U & V) that are used for vertical advection of momentum.
2158    
2159    checkpoint48a_post
2160    o In preparation for r*, use temp. array to compute vertical transport
2161       in flux-form momentum pkg. => change results of few test-exp.
2162      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2163                        lab_sea, natl_box & plume_on_slope
2164    
2165    checkpoint48
2166    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2167    
2168    checkpoint47j_post
2169    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2170    o moved adexch from forward_step to addummy_in_stepping
2171    o added exch in ctrl_map_...
2172    o aveFreq.=0. at end of cost_final to avoid overwrite in
2173      reverse checkpointing loop
2174    o Yet more changes in gmredi:
2175      * adgmredi_calc_tensor
2176        avoiding all recomputation of gmredi_slope_limit
2177      * adgmredi_x/y/rtransport
2178        added flag for excessive storing to avoid recomp. of
2179        u/v/rtans, dTdx/y/z
2180        -> this is not really necessary and very memory-consuming
2181      * adgmredi_slope_psi:
2182        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2183      * gmredi_slope_limit
2184        re-activated full calculation of taperfct for case 'ac02'
2185    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2186    
2187    checkpoint47i_post
2188    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2189    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2190      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2191    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2192    o gmredi: fix few bugs.
2193    
2194    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2195    This will be a good checkpoint to plug into the ecco-branch.
2196    o few modif.'s to get latest version adjointed
2197      (mainly kick out code in ini_linear_phisurf)
2198    o modif's to run adjoint with exactConserv
2199    o case GM_BOLUS_ADVEC should be cleaned
2200      S/R gmredi_slope_psi should be cleaned
2201    o verification/carbon now has exactConserv=.TRUE.
2202    
2203    checkpoint47g_post
2204    o time-average AIM output: becomes independent from statvars time-average
2205      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2206    o After TAF bug fix:
2207      Tested adjoint of gmredi package.
2208      Tests were done with checkpoint47 rather than with latest
2209      checkpoint47f_post since the latter is broken for the adjoint
2210      verification/carbon/ contains both ADM and TLM gradient checks.
2211    Here they are, before they get changed/lost/stolen.
2212    Mostly modif.'s to fix numerical sensitivities.
2213    Gradient checks OK for
2214    - GM_taper_scheme:
2215      * clipping
2216      * ac02
2217      * linear
2218      * glw91
2219      * dm95
2220      * ldd97
2221    - GMREDI_OPTIONS:
2222      * GM_VISBECK_VARIABLE_K
2223      * GM_NON_UNITY_DIAGONAL
2224      * GM_EXTRA_DIAGONAL
2225      * GM_BOLUS_ADVEC
2226    in conjunction with data.gmredi parameters to be checked in
2227    in a few minutes under verification/carbon/code/
2228    
2229    checkpoint47f_post
2230    Merging from release1_p10:
2231    o modifications for using pkg/exf with pkg/seaice
2232      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2233        and SEAICE_EXTERNAL_FLUXES
2234      - pkg/exf CPP options EXF_READ_EVAP and
2235        EXF_NO_BULK_COMPUTATIONS
2236      - usage examples are Experiments 8 and 9 in
2237        verification/lab_sea/README
2238      - verification/lab_sea default experiment now uses
2239        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2240    
2241    checkpoint47e_post
2242    o created a tag prior to creating a branch
2243    
2244    checkpoint47d_post
2245    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2246      at the bottom boundary had an erroneous half slip boundary condition
2247    o added bottom drag and no slip boundary condition capabilities to
2248      oceanic pressure coordinates code
2249    o added new verification experiment global_ocean_pressure, this experiment is
2250      also described in the tutorial section of the manual
2251    checkpoint47d_pre
2252    
2253    checkpoint47c_post
2254    o Added a verification experiment for a global cubed-sphere ocean run
2255      -  verification/global_ocean.cubed32x32x30
2256      -  uses pkg/therm_seaice and pkg/bulk_forcing
2257    
2258    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2259    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2260      when using P-coordinate; only implemented for atmospheric config.
2261    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2262      NOTES: requires option NONLIN_FRSURF to be "#define".
2263    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2264    
2265    checkpoint47b_post
2266    Merging from release1_p9:
2267    o pkg/seaice
2268      - removed GOTO's and added taf directives
2269      - double precision constants to reduce the g77 (Linux)
2270        to F77 (SGI) differences reported in release1_p8
2271    o tools/genmake
2272      - added SGI options
2273    o verification/testscript
2274      - updated to that of checkpoint47a_post
2275    o verification/global_ocean.90x40x15/input/eedata
2276      - modified for SGI f77 compatibility
2277    o verification/lab_sea
2278      - added description of sea-ice model
2279      - added missing matlab routines
2280      - added test of thermodynamics parallelization
2281    
2282    checkpoint47a_post
2283    o new pkg: aim_v23
2284     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2285       for now, keep the same surface forcing as before.
2286     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2287     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2288     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2289    o add diagnostic of surface correction term in monitor output
2290    
2291    o bulk_force and therm_seaice
2292    - Two packages:  bulk_force (Bulk forcing)
2293      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2294    - Earlier integration from Stephaine Dutkiewicz
2295      and Patrick Heimbach.
2296    - Two ifdef statements for compile time,
2297       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2298    
2299    checkpoint47
2300    differentiable version of checkpoint46n_post
2301    o bug fix in quasihydrostaticterms
2302    o * "clean" adjoint code (in terms of extensive recomputations)
2303        can now be obtained for all GMREDI options (i.e. for
2304        - GM_VISBECK_VARIABLE_K
2305        - GM_NON_UNITY_DIAGONAL
2306        - GM_EXTRA_DIAGONAL
2307        - GM_BOLUS_ADVEC )
2308      * However, wrong gradient check problem remains unsolved.
2309      * New CPP options have been introduced for different
2310        tapering schemes
2311    o external_fields_load now part of differentiation list
2312    o pressure needs multiple storing;
2313      would be nice to have store_pressure at beginning or
2314      end of forward_step, e.g. by having phiHyd global (5-dim.)
2315      (NB: pressure is needed for certain cases in find_rho,
2316      which is also invoked through convective_adjustment).
2317    o recomputations in find_rho for cases
2318     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2319    o #define ATMOSPHERIC_LOADING should be differentiable
2320    o ini_forcing shifted to begining of initialise_varia
2321    o Incorporating QNVS line search routines into MITgcm
2322      (this is separate code, and therefore not under pkg)
2323      lsopt/, optim/
2324    o Updated verification/carbon/
2325      - #define GM_VISBECK_VARIABLE_K
2326      - GM_taper_scheme    = 'ldd97'    
2327    
2328    checkpoint46n_post
2329    Merging from release1_p8:
2330    o verification/natl_box:
2331      updating new external_fields_load routine
2332    o New package: pkg/seaice
2333      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2334      The sea-ice code is based on Hibler (1979-1980).
2335      Two sea-ice dynamic solvers, ADI and LSR, are included.
2336      In addition to computing prognostic sea-ice variables and diagnosing
2337      the forcing/external data fields that drive the ocean model,
2338      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2339      The implied surface heat flux is then stored in variable
2340      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2341      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2342      non-local transport term.  Because this call precedes model
2343      thermodynamics, temperature under sea-ice may not be "exactly" at
2344      the freezing point by the time theta is dumped or time-averaged.
2345      N.B.: fairly large differences in accuracy occur across
2346            different platforms/compilers; comparison between
2347            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2348            generated output gives:
2349       T           S           U           V
2350      C D M    c        m  s        m  s        m  s        m  s
2351      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2352      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2353      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2354    
2355      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2356    o GAD:
2357      - generated new common blocks to account for call of
2358        same gad routines with differing traceridentities
2359        (needed to modify tracerIdentity indices in GAD.h)
2360      - generated separate common blocks for case useCubedSphereExchange
2361        (Department of Futurology)
2362      - parameter lists to gmredi_?transport: added tracerIdentity
2363      - added new key indices to tamc.h
2364    o external_fields_load:
2365      - added this routine to TAF list
2366      - needed to make some common blocks global and additional storing
2367        along the same lines as exf package (checkpoint_lev?_directives.h)
2368    o exf:
2369      updated external forcing package
2370      - bug fixes carried over from ecco-branch
2371        (missing OBCS_OPTIONS.h in two routines)
2372      - enable easy to use "no forcing".
2373      - added exf I/O for atmospheric loading
2374      - added exf I/O for runoff data
2375      - transfered scaling between exf <-> MITgcm to exf namelist
2376    o Adding new verification experiment global_with_exf.
2377      This verification experiment is almost identical to the
2378      global_ocean.90x40x15 experiment, except that it uses
2379      the exf (and cal) package instead of the
2380      external_fields_load routine (cf README file).
2381    
2382    checkpoint46m_post
2383    o modified testscript to return -- when there are no lines of "%MON" output
2384    o added new flag "quasiHydrostatic" for QH mode
2385      and new routine quasihydrostaticterms()
2386    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2387      New routine: mom_u_coriolis_nh()
2388    o fixed sign of non-hydrostatic metric terms in u and v equations.
2389      Depend on correct sign of gravitySign.
2390  o added work.pc* to .cvsignore in aim directories using ifc  o added work.pc* to .cvsignore in aim directories using ifc
2391  o introduced flag for controllin non-hydrostatic metric terms  o introduced flag for controllin non-hydrostatic metric terms
2392  o removed gravitySign from PARM04  o removed gravitySign from PARM04

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