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revision 1.26 by adcroft, Mon Apr 10 14:41:52 2000 UTC revision 1.749 by mlosch, Thu Nov 23 10:03:44 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 mom_common/vecinv/fluxform: fix a few initialisation isssues
8    o profiles: fix for multithreaded case
9    
10    o diagnostics: rename few diags:
11      s/'PRESSURE'/'RCENTER '/g
12      s/'TICE    '/'oceFreez'/g
13      s/'TAUX    '/'oceTAUX '/g
14      s/'TAUY    '/'oceTAUY '/g
15      s/'SWFLUX  '/'oceQsw  '/g
16      s/DIFx/DFxE/g
17      s/DIFy/DFyE/g
18      and add few ocean-forcing diagnostics:
19      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
20    o modifications to pkg/seaice/growth.F and budget.F, which change results of
21      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
22      as actual snow thickness.  It now refers everywhere to effective snow
23      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
24    
25    checkpoint58r_post
26    o modifications to pkg/seaice/growth.F, which change results of
27      lab_sea experiment: fixes pertain to melting snow over open water, to
28      masking EVAP under sea ice, and to using the correct AREA variable for
29      computations of EVAP, PRECIP, HSNOW, and GHEFF
30    o add ability to read bathy, salt, and theta using MNC (off by def)
31    o add flooding algorithm and advection of HSNOW for pkg/seaice;
32      both are turned off by default and do no change any results
33    o seaice advection with pkg/thsice: a step toward the use of non-linear
34      advection scheme, but #ifdef or commented out for now (requires more EXCH).
35    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
36      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
37      in natl_box (affects results @ truncation level: update output.txt)
38    o multi-threading and IO:
39      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
40      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
41        (needed to work with SingleCpuIO): tested in all verif. exp.
42    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
43      affects the results (but none of the verification test uses this scheme).
44    o Adding some pkg/diagnostics capability to pkg/seaice
45      (will certainly be subject to changes)
46    o ctrl: adding new control variables:
47      lwflux, lwdown, evap, snowprecip, apressure, runoff
48    
49    checkpoint58q_post
50    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
51      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
52      high_res_cube configuration by 4% on Columbia.
53    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
54      add (in global_with_exf/code) a version of EXF_INTERP_READ without
55      dynamical allocation (seems to work in multi-threaded).
56    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
57      single CPU io) so that TAF does not have to see EESUPPORT.h
58    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
59    
60    checkpoint58p_post
61    o obcs: stop if obcs is used with useCDscheme = .true.
62    o shelfice:
63     - fix a sign error so that no slip at shelfice interface works
64     - remove stop for combination non-hydrostatic code and shelfice. That does
65       not mean, that the results are correct, but at least they are numerically
66       stable
67    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
68    o added adjoint exch routined for all exch*3d* routines
69      and updated flow directives
70    
71    checkpoint58o_post
72    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
73      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
74    o change controling S/R for writing pickup file (new S/R do_write_pickup)
75      and clean-up reading/writing of pickup files.
76    o fix local version of read/write pickup (NH part) in rotating_tank/code
77    o simplify EXCH interface:
78     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
79     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
80    o added the regrid package
81    o shelfice:
82     - add a simple boundary layer scheme to reduce noise
83     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
84    
85    checkpoint58n_post
86    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
87       local variable (not in common block).
88    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
89      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
90      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
91        to work with SingleCpuIO.
92    o add "_d 0" to real constant of pkg/cfc subroutines ;
93       update exp. cfc_exemple & tutorial_cfc_offline output files.
94    o multi-threading and IO:
95      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
96        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
97      - barrier before and after reading.
98      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
99      - avoid using MDS_WRITELOCAL for LAND pkg output.
100      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
101        common-block variables ; Allows multi-threading with master-thread IO.
102    o change default MAX_NO_THREADS from 32 to 4 ;
103      and stop cleanly when MAX_NO_THREADS is too small.
104    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
105    
106    checkpoint58m_post
107    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
108       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
109    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
110       keep global_ocean.90x40x15 (for AD testing) with former secondary test
111       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
112    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
113        add MITgcm_tutorials (= code + all the tutorials)
114    o ecco, option to compute cost for total ssh (mean+anom)
115    o consistent with addition of ptracer and ssh in pkg/profiles
116    o profiles: adding ptracer and ssh
117    o testreport: change multi-test output-file name
118      (from output.txt.{name} to output.{name}.txt)
119    o profiles: now ok for mutli-tiles case
120    o seaice: add 4 parameters for different advection schemes for area,
121      (effective) seaice thickness, enthalphy, and snow height. Their default
122      is the standard parameter SEAICEadvScheme
123    o calc_gw:
124     - add cosFacU in zonal viscous flux (harmonic.visc.).
125     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
126       of tutorial_plume_on_slope.
127    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
128    o calc_gw: true flux-form, account for horizontal grid spacing.
129      update rotating_tank results, but not plume_on_slope (affected at
130      truncation level, 11 digits).
131    
132    checkpoint58l_post
133    o calc_gw:
134     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
135     - remove side-drag for now (need to fix it); update plume_on_slope results.
136     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
137    o commit code to make SST/SSS weights spatially variable
138      (based on either variable in-situ or variable initial T/S weights)
139    o pkg/ecco:
140      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
141        now based on horizontally varying weights wthetaLev, wsaltLev
142      * cost_averagesflags now returns year indices in addition to day, month
143      * sflux balance is performed on annual basis
144        (sflxumm, sfluxmm2, bal_sfluxmm)
145      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
146        including separate counting and multipliers
147    o pkg/rbcs
148      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
149    
150    checkpoint58k_post
151    o testreport:
152     - always build in dir. "build" (if not there, mkdir build instead of building
153       & running in input)
154     - run in dir run (if it exists), in build otherwise.
155     - call prepare_run (if input/prepare_run exists)
156     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
157    o pkg/exf modifications to interpolation and rotation routines for more
158       reasonable treatment of North Pole singularity: for tracers North Pole
159       value is set to northernmost zonal-mean value, for zonal velocity it is
160       set to zero, and for meridional velocity it is set to northernmost value.
161    o pkg/exf/exf_check_range.F
162     - add tile index to diagnostics and move stop statement to the very
163       end of the routine.
164    o pkg/diagnostics: (diagnostics_main_init.F)
165      define title of isomorphic variables according to the current config.
166    o pkg/thsice with pkg/seaice dynamics:
167    - fix domain of computation (interior only, required for exf) and do exchanges
168    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
169    o towards a standard way of dealing with multi-threading in MONITOR
170      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
171    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
172       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
173    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
174    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
175    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
176       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
177    o tracer advection:
178     - clean-up and simplify calc_common_factors.F
179     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
180       advection subroutine (but still not used within DST advection S/R)
181    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
182    
183    checkpoint58j_post
184    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
185      from file (collects calls previously in FORWARD_STEP)
186    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
187    o adjoint store dir. adjusted accordingly
188    o genmake2
189      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
190    
191    checkpoint58i_post
192    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
193      on wind stress (SEAICEstressFactor defaults to 1.)
194    o Total number of Timers is finite (<=40): comment out 2 non-essential one
195      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
196    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
197      on CS-grid: no longer loosing mass.
198    o exf & curvilinear-grid: no longer modify longitude xC & xG.
199    o pkg/ggl90: fix sloppy output and fix a bug
200    o pkg/seaice: added SEAICEuseEVPpickup parameter
201      - Set to false in order to start EVP solver with
202        non-EVP pickup files when using SEAICEuseEVP
203      - fix sign error in diffusion in seaice_calc_rhs
204    
205    checkpoint58h_post
206    * Modifications for bottom topography control
207      o replace hFacC by _hFacC at various places
208      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
209      o add non-self-adjoint cg2d_nsa
210      o update autodiff support routines
211      o re-initialise hfac after ctrl_depth_ini
212      o works for 5x5 box, doesnt work for global_ocean.90x40x15
213    * Adding verification for 5x5 box (4-layer) bottom topography control
214    
215    checkpoint58g_post
216    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
217       used for mean seasonal cycle, mean diurnal cycle); add an example
218       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
219    o pkg/ggl90:
220      - add parameter (minimum surface kinetic energy)
221      - fix bug (avoiding division by zero)
222    o couple pkg/thsice to pkg/seaice:
223      - modify advection in seaice to accomodate new scalar fields to be advected
224      - only muliDimAdection scheme work with seaice/thsice
225      - mapping of thsice-variables to seaice-variables, back and forth
226      - does not break the verification experiments, but does not give the
227        desired results either
228    o pkg/seaice
229      - make (default) second order advection a bit less confusing?
230    
231    checkpoint58f_post
232    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
233      to pkg/seaice):
234      - new routines thsice_map_exf and thsice_get_exf provide the interface
235      - add an additional formal parameter to thsice_solve4temp
236    o pkg/exf:
237      - add new fields wspeed, snowprecip (to be able to couple to thsice)
238      - correct Stefan-Boltzmann constant
239      - new parameter for longwave surface emittance
240      - separate some stuff from exf_bulkformulae into new routines  
241        exf_radiation, exf_wind
242      - add new parameters and constants: longwave emissivity for ocean, ice
243        and snow, evaporation parameters over ice
244      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
245        either wind from stress or stress from wind
246    o pkg/thSIce:
247    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
248    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
249       and THSICE_CALC_THICKN
250    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
251    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
252      to make debugging easier.
253    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
254    o pkg/bulk_force:
255      - clean-up comments and parameters ;
256      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
257    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
258      generate new output for test-experiment: aim.5l_cs.thSI
259    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
260      testreport accordingly
261    
262    checkpoint58e_post
263    o SEAICE_CGRID adjoint done
264    o R_STAR adjoint implemented.
265      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
266      * need to sort out init. of h0facc, etc.
267    o Make pkg/profile fully independent of ecco,cost, etc. stuff
268      to be able to use it in pure forward.
269    
270    checkpoint58d_post
271    o upgrade simple test-experiment to tutorial example:
272     step.1: duplicate the experiment and (step.2) will remove the old copy.
273      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
274      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
275      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
276      tutorial_global_oce_biogeo    <- copy of dic_example
277      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
278      tutorial_plume_on_slope       <- copy of plume_on_slope
279      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
280      tutorial_global_oce_optim     <- empty for now (David ?)
281      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
282     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
283    o correct a sign problem in cost_scat.F
284    o obcs and ptracers: fix boundary conditions for advections schemes
285      with larger stencil
286    o thsice adjoint: start
287    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
288      completeness
289    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
290      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
291    o ptracers adjoint:
292      * avoid extensive recomputatations
293      * fix missing re-init. of gptr (missed by TAF)
294    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
295      me to turn off the excessive output to STDOUT that this package produces
296    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
297      and add those terms in Vector-Invariant formulation.
298    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
299      if the control period (xx_hfluxperiod etc) is 0
300    o in profiles pkg, clean routines and fix details
301    o in ecco pkg, reading ssh data:
302      fix problem in case the model does not start at iter0=0
303    o fix mnc-pickup/restart for ptracers
304    o new package prifiles:
305      code to compute profile-based cost by Gael Forget
306      (modifs in ecco, ctrl, autodiff)
307    o Benign bug fix in initialization (spotted by M. Mazloff) of
308      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
309    
310    checkpoint58c_post
311    o adjoint: finish NLFS adjoint and provide reference output in
312      verification/global_ocean.90x40x15/results_ad_nlfs
313    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
314      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
315      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
316      with SEAICE_CGRID defined.
317    o move calendarDumps from "data" to "data.cal" and clean-up the code
318      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
319    o add useEXF & useCAL flags (for now, set in hard-coded way)
320    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
321      (were missing in NH mode, and wrong in quasihydrostatic mode).
322      waiting for Chris updated version of calc_gw to add those CALLs.
323    o fix bug in quasihydrostatic S/R ;
324      add a test for this option: global_ocean.90x40x15.qshyd
325    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
326      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
327    o add on/off flag useOffLine for package OFFLINE
328    o seaice:
329      - modify advection so that it works also on the C-grid
330      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
331        problem in multi-tile runs with C-grid
332      - add flags for clipping ice velocities and/or masking solver forcing
333      - fix drag (ocean on ice) formulation and a bug that caused noise in the
334        C-grid solver
335      - added a few comments to seaice_diffusion.F
336      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
337        are now exclusive)
338      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
339        required re-ordering the code a little:
340       + make DAIRN global variable (defined in SEAICE)
341       + move computation of the viscosities eta and zeta into a new separate
342         routine (because I need to recompute them in seaice_ocean_stress.F)
343    
344    checkpoint58b_post
345    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
346      update output.txt of exp. aim.5l_cs.thSI
347    o various mnc cleanups and improvements:
348      + shrink lookup tables by factor of ~4
349      + better error reporting when running out of lookup space
350      + able to handle longer path/file names (up to 500 chars)
351    o adjoint:
352      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
353      - TBD: "hidden" mom_vecinv recomp. in dynamics
354    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
355     (allow to differentiate between forcing components using new integer flags:
356      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
357     and add new flag to put Dissipation tendency out of Adams-Bashforth.
358    o ecco
359      - enable trend removal from SSH anomaly obs.
360    o adjoint
361      - a fix for PmEpR when #undef EXACT_CONSERV
362      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
363      - try to fix "hidden" recomp. in forward_step for NLFS
364        (NLFS seems broken sometimes after I checked it in)
365    o seaice:
366     - add c-grid version of the dynamic solver:
367       + three new routines that are the c-grid substitute lsr, dynsolver
368         and ostres
369       + put a few fields that were local to dynsolver into global common
370         blocks, so that I can move the computation of stresses etc into
371         seaice_lsr (saves coding but may break the adjoint).
372     - replace more hardwired parameters by runtime parameters
373     - add ice masks that mask the rhs of the implicit solvers where there
374       is no ice (commented out in seaice_dynsolver, because i am not sure
375       if this works properly), eventually this should replace the clipping
376       of ice velocities in seaice_dynsolver to +/-40cm/s.
377    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
378      include it only where its needed
379    o move balancing of fluxes before the call of external_forcing_surf
380    o seaice:
381      - correct units of turning angles (now they are really in degrees)
382      - move computation of GWATX/Y out of main routine into dynsolver
383      - initialize GWATX/Y in seaice_init
384    o Apply mask on Fresh-Water flux (needed for SSH forcing).
385      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
386    o seaice: add runtime flags for turning angles (default to zero)
387    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
388      and trend from exf forcing and ctrl control adjustments
389    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
390      (since checkpoint57x_post)
391    o change the default rotation period to 86164.s = the Earth rotation
392    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
393      and based on a reference stratification. Tested within hs94.cs-32x32x5.
394    o seaice advection: add code for choosing between the default (2nd order
395      central differences) and multiDim advection schemes provided by
396      pkg/generic_advdiff
397    o seaice:
398      - removed all references to SEAICE_GRID.h fields from
399        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
400        (cubed-sphere configuration will change a little)
401      - grid computations in seaice_init are obsolete now.
402      - cleaned up code a little so that is easier to read (hopefully).
403      - added new (better?) discretizations of default advection and diffusion
404        (turn on with SEAICEuseFluxForm)
405      - replace 1 in 3d global fields by kSurface in growth.F
406      
407    checkpoint58a_post
408    o seaice:
409      - bug fix in advect.F
410    o shelfice:
411      - separate shelfice load anomaly from pload (breaks with time
412        dependent forcing), => introduce constant field shelficeLoadAnomaly.
413        Its default is 0., but it may be computed more cleverly from (unknown)
414        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
415        done offline. A good approximation of the pressure load anomaly is
416        necessary to avoid large initial adjustment processes underneath
417        deep-reaching shelfice.
418      - small fix in ISOMIP shelfice_thermodynamics
419      - add more sophisticated thermodynamics of Hellmer (1989), this is
420        now the default
421      - give a few constants more intuitive names
422    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
423      if bulk formulae are used in long integration (especially EmPmR). Turn
424      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
425      if balancePrintMean, the imbalance that is substracted is printed to
426      STDOUT.
427    o fix bug (typo) in obcs_apply_eta.F
428    o add a new package shelfice which enables us to model the circulation
429      underneath shelf-ice with draughts of hundreds of meters.
430     - works
431     - to do: + include improved thermodynamics
432              + check whether kSurfC (from model/inc/SURFACE.h) can be used
433                instead of new field kTopC
434              + can we use topoFile, Ro_surf and existing code in ini_depth.F
435                instead of new field R_shelfIce and new code in ini_depth.F
436                and ini_mask_etc.F?
437              + adjust vertical mixing schemes?
438    o seaice pkg:
439     - add a cpp-flag to include a simple formula for a salinity dependent
440       freezing point of sea water at the surface
441     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
442       meridional stresses are now different (and hopefully correct)
443    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
444       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
445       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
446    o pkg/diagnostics: add options and parameters for regional-statistics
447       diagnostics ; define regions by reading a region-mask from a file
448       (might add other options later)
449    o pkg/bulk_force:
450     - add option and parameters to use AIM surface-flux formulae.
451     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
452       others forcing fields (defined in PARM05, parameter file "data") are loaded
453       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
454     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
455     - use the right EXCH call for uwind,vwind (to work on CS-grid).
456     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
457       and parameters (note: calcWindStress replaces .NOT.readwindstress).
458     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
459    
460    checkpoint58
461    o add "--embed-source" option to genmake2 which, when the supporting
462      tools can be compiled (as determined by genmake2) will turn on the
463      embed_files package which then embeds the entire MITgcm source code
464      (*.[fFhc] + Makefile) used for the build within the executable
465      - requested by CNH but off by default
466      - adds a paltry <9MB to the mitgcmuv executable in most cases
467      - only writes the output when useEMBEDSRC in eedata is true
468    o clean up 3-dim. relaxation codes:
469      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
470      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
471      * Thanks to Tom Haine for testing!
472    
473    checkpoint57z_post
474    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
475      affects output (@ truncation level) of exp. plume_on_slope ; updated.
476    o fix the pickup behavior for obcs in combination with ptracers
477    o fix a bug in ptracers_external_fields_load
478    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
479      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
480    o transfered surface NH pressure to eta field (if exactConserv).
481    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
482         and update lab_sea output.txt file.
483    o completing 3-dim. relaxation code: additional term
484         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
485      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
486      * At compile time, in "EXF_OPTIONS.h" set
487          #define  ALLOW_CLIMTEMP_RELAXATION
488          #define  ALLOW_CLIMSALT_RELAXATION
489      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
490          tauThetaClimRelax3Dim = 15552000.0,
491          tauSaltClimRelax3Dim  = 15552000.0,
492      * 3 cases:
493          1) Use a constant-in-time 3-dim. field
494          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
495          3) Real-time relax. to time-evolving prescribed field
496    o Adding Laplacian-type smoothness constraint on
497      initial and boundary (forcing) controls (ic, bc)
498      * enable at compile-time via
499        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
500      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
501      * Absolute scale somewhat unclear so far
502      * no area weighting was included since no other cost term does so far
503    
504    checkpoint57y_post
505    First step for a NLFS adjoint
506    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
507    o new init. routines for calc_r_star, calc_surf_dr
508    o still need to deal with ini_masks_etc
509    o testreport seemed happy
510    checkpoint57y_pre
511    
512    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
513    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
514    o add new offset feature to offline pkg (plus minor cleanup)
515    o cfc fixes for final year of integration
516    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
517      be in GCHEM_OPTIONS).
518    
519    checkpoint57x_post
520    o fix testreport Pb in multiple test experiment.
521    o cleanup our namelist syntax in verification:
522      - make it more F95 standards compliant (some work still needed)
523      - allows the vast majority of our tests to work with gfortran
524    o Non-Hydrostatic:
525     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
526     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
527    o Allow to apply AB on T,S rather than on AB(gT,gS):
528     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
529     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
530       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
531     - need a "clever" read_pickup to restart from the other AB formulation
532    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
533    o remove some unused variables (reduces number of compiler warnings)
534    o adjoint
535      * Disable useVariableViscosity for adjoint for time being
536        (there are a number of extensive recomputations)
537      * Initialize certain variables needed for adjoint
538    
539    checkpoint57w_post
540    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
541                 fix the singleCpuIO RS version of MDSWRITEFIELD
542       and add a WARNING if using globalFiles=T with multi-processors.
543    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
544      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
545    o tracer advection scheme:
546      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
547       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
548       was not very convenient).
549      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
550       (further tests needed for the implicit DST & Flux-Limiter schemes).
551    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
552      and sRef for convenience, handy, when you want to initialize
553      ptracers in a large domain with a constant non-zero value. Also,
554      untangle ptracers_init.F a little.
555    
556    checkpoint57v_post
557    o change dome exp. to use variable viscosity in side-drag terms.
558    o remove all the files from the cfc_offline test since they are now
559      incorporated into tutorial_cfc_offline which has been producing
560      identical results for a few days of testing
561    o add new parameter: sideDragFactor to enable half-slip-side BC
562      and change side-drag S/R to use viscosity from mom_calc_visc
563      (can switch back by setting sideDragFactor=0.); affects results at
564      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
565       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
566    o vorticity & strain are now computed without masking, to account for
567      no-slip-side BC in variable viscosity calculation ; mask is applied
568      anyway later on, before computing advection/coriolis terms.
569    o modify exp4 to test new obcs support for reading from external files
570      and for passive tracers
571    o fix behavior of ptracers_monitor when monitor output is written to a
572      netcdf-file; still not independent of monitor.F (writes in the same
573      file).
574    o change default value of tRef (put a uniform, meaningful value for ocean
575      & atmos) and initialize sRef (was missing, as Martin mentioned).
576    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
577      to be proportional to enstrophy dissipation length.  Thus,
578       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
579      This is now consistent with Smagorinsky and with the manual.
580    
581    checkpoint57u_post
582    o OBCS and PTRACERS: add open boundary support for passive tracers
583      - either use homogenous (pseudo) v.Neumann conditions or prescribe
584        OB-values from file; this is not different from the way theta and salinity
585        are treated
586      - however, Orlanski-radiation conditions are not supported, and the model
587        will stop if you use pTracers and Orlanski at the same time.
588      - beefed up the rountine obcs_external_fields_load: now only those open
589        boundary values are overwritten with values from files for which there
590        are really files, otherwise the OB-fields remain untouched. This makes
591        it possible to use different OBs at different ends of the domain (as
592        with EXF)
593    o reduce number of exch calls in shap_filt (s2).
594    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
595      truncation level) 4/5 MLAdjust test results (11&12 digits match).
596    
597    checkpoint57t_post
598    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
599    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
600      same truncation, independent of the face number: affects affects several
601      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
602    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
603      note that biharmonic viscosity + no-slip was not tested in any experiment.
604    o fix bug in non-linear free-surf side-drag ; generate new output for
605      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
606    o make mnc honor the writeBinaryPrec flag for most kinds of output
607    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
608    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
609      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
610    o add brackets in multi-terms sum to get same truncation, independent of
611      the face number (manage to get exactly same value of gU,gV at the cs-edge)
612      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
613    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
614      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
615      a maximum grid-scale Reynolds number.  Also, changes all length calculations
616      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
617      Suggested values of viscosity parameters found in mom_calc_visc.
618      Many new viscosity diagnostics available.
619    
620    checkpoint57s_post
621    o Add clearing-house for viscosity calculations, mom_calc_visc and
622      correct numerous bugs in LeithD and Smagorinsky discretizations.  
623      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
624      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
625      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
626      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
627      The Strain-Tension form is now called with useStrainTensonVisc=.true.
628      ViscAhStrain and viscAhTension are now retired.
629    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
630    o In response to JMC's bug report, genmake2 now ignores any soft-links
631      that it finds in the *current* directory when searching for files.
632      Soft-links found in any other source directories will still work as
633      they did before.
634    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
635      a C routine to unlimit the stack size
636    o mnc-ify pkg/aim snapshot vars
637    o mnc-ify pkg/land as requested by Daniel
638    o various changes to mnc including:
639      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
640      - output can now be grouped so that all files within a group
641          change the ITER portion of their names in lock-step together
642      - can now read ("global") PER-FACE (in addition to PER-TILE) files
643          and works with both EXCH1 and EXCH2 (but needs more testing)
644      - writing works for all verification test cases w/ g77 on Linux
645    
646    checkpoint57r_post
647    o make MNC variable initialization happen earlier
648    o add diagnostics for (almost) each term of the momentum Eq.
649    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
650    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
651    o remove MINIMAL_TAVE_OUTPUT option ;
652      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
653    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
654      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
655    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
656    o add time-dependent SST, SSS control
657    o cost terms in ecco/ modularized (new cost_generic.F)
658    o cost_averages routines are modularized (new cost_averagesgeneric.F)
659    o new infrastructure for seaice model vs. obs misfits in seaice/
660      * driver from the_main_loop.F is seaice_cost_driver.F
661      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
662      * gradient check in Exp. 6a of natl_box_adjoint/
663    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
664      (see README file)
665    
666    checkpoint57q_post
667    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
668    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
669      - bug was reported by Jean-Michel and Ian Fenty
670    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
671      update exp. cpl_aim+ocn output.
672    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
673      Needed for high-res. runs with large global files
674      to be able to limit tapelev size
675    o Changed some tests for adjoint:
676      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
677      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
678      * global_ocean.90x40x15/ back to default 3-level checkpointing
679    o Modifications to enable scripted COMMON to MODULE conversion
680      * verification/OpenAD/code/ has necessary scripts and description;
681      * converts, compiles and runs successfully;
682    
683    checkpoint57p_post
684    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
685    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
686      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
687    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
688    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
689      (was already the case for dissipation with mom_vecinv,
690       and also the case for grad.PhiHyd when staggered-timeStep)
691      This will allow to put dissipation out-off the AB time-stepping.
692     Unfortunately, affects truncation error. Update output of exp. that "fails"
693      (cg2d matching number) and leave the others for later: front_relax(10),
694      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
695      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
696    
697    checkpoint57o_post
698    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
699      (2) its ready to be documented during the 20050801 DocFest
700    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
701      for ideal_2D_oce and lab_sea on linux_ia32_g77
702    o set to #undef CTRL_SET_OLD_MAXCVARS_30
703      in global1x1_tot/code_seaice_adj to access indices 32, 33
704      (worth another tag)
705    
706    checkpoint57n_post
707    o adding precip control xx_precip 32
708    o adding swflux control xx_swflux 33
709    o Replacing 10 forcing penalty cost routines by 1 generic.
710    o Implementing partitioning in time-mean and variable adjustment
711      for atmos. state.
712    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
713    o in natl_box_adjoint:
714      * updated exp 1 to 10
715        (but does not have time-mean vs. variable split results yet)
716    o updated global1x1/*_seaice_adj/
717      to incorporate latest changes
718    o enable useSingleCpuIO for mdsio vector routines
719      (applies in particular to tapelev I/O)
720    o removed inefficient K-loop in all active_file*control*.F
721    
722    checkpoint57m_post
723    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
724      and advect_cs (use EXCH-2 and standard cs-32 grid files).
725    o pkg/exch2: filling of face-corner halo regions is optional
726      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
727    
728    checkpoint57l_post
729     tag before updating tutorials (pre-release-2)
730    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
731       for output and interpolation of input fields onto model grid)
732    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
733       Affects results of exp. rotating_tank ; update output.txt.
734    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
735          and taking the square quantity and/or using a fraction-weight field.
736    o fix aim_diagnostics_init.F mate numbers.
737    o add mnc output capability to diagnostics/diagstat and update
738      our cvsignore files for the ACSII output generated
739    
740    checkpoint57k_post
741    o lab_sea now uses diagnostics package and provides a suite of
742      new EXF diagnostics output.
743    
744    checkpoint57j_post
745    o exf
746      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
747        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
748        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
749      * extended diagnostics output
750        - now includes all EXF variables
751        - hs, hl moved to common block
752        - separate S/R for diagnostics, called after ctrl vector is added
753        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
754        - EXFqnet contains true Qnet (i.e. includes qsw)
755      * updated verif. lab_sea, global_with_exf
756      * Rearranging hflux (exf_mapfields -> exf_getforcing)
757        to ensure that diagnostics sees a true EXFqnet
758    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
759    o diagnostics pkg: change pointers so that 1 diagnostic can be used
760      several times with different frequencies.
761    o mnc-ify the thsice package as requested by Daniel Enderton
762      - the monitor--MNC output needs work
763      - many attributes need to be added (most are currently blank)
764    o mnc-ify theaim_v23 package as requested by Daniel Enderton
765      - many attributes need to be added (most are currently blank)
766    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
767    o add Sadourny like discretization to the 4th.O vorticity advection scheme
768    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
769      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
770         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
771    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
772     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
773    
774    checkpoint57i_post
775    o Diagnostics package was changed: diagnostic allocation is now deactivated
776      by setting an empty file name in the namelist (used to be by setting 0 frequency)
777    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
778      add 1rst Order upwind vertical Shear.
779    o add a quick fix for A/B checkpointing in OFFLINE mode
780    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
781      end-run around the C/Fortran linking horror in eesup/src/timers.F
782    o added pkg/runclock: allows user to terminate run based on wall clock
783    o added non-hydrostatic scaling parameter: nh_am2
784    o pkg/my82: futile attempt to make results compiler-independent by adding
785      some "_d 0", etc. no effect.
786    o for mnc output, fill the 'T' coordinate var with myTime and create a
787      separate 'iter' variable for iteration count
788    o pkg/diagnostics:
789      add new capability: output of Global/Regional & per-level statistics ;
790      tested against monitor output (including land & thSIce) on various exp.
791    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
792    
793    checkpoint57h_done
794      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
795      data.diagnostics, data.gchem, data.ptracers) is done.
796    
797    o pkg/diagnostics: prepare for Global/Regional statistics.
798      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
799    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
800      and rename it: DIFFERENT_MULTIPLE
801    
802    checkpoint57h_post
803    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
804    o pkg/diagnostics: change output frequency, now in seconds (instead
805      of Nb of iterations). This requires to change data.diagnostics.
806    checkpoint57h_pre
807    
808    o in mnc, let the user create the output dir if both mnc_outdir_date
809      and mnc_outdir_num are false
810    o add fflags() to pkg/diagnostics which allows one to specify, on a
811      per-file basis, the file precision [default behavior is unchanged]
812    o added diagnostics to pkg/kpp, including computation of mixed layer
813      depth based on a temperature/density criterion
814    o updated verification/natl_box to test the new pkg/kpp diagnostics
815    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
816    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
817    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
818      not mnc -- this mistake was found by JMC and is now corrected
819    
820    checkpoint57g_post
821    o add Adams-Bashforth 3rd Order time stepping:
822      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
823      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
824    checkpoint57g_pre
825    
826    o make lambda[Theta,Salt]ClimRelax spatially varying
827      (default remains spatially uniform constant based on tau)
828    o added new control variables
829      * init. uVel, vVel, etanN
830      * lambda[Theta,Salt]ClimRelax
831    o separate masks used for ctrl_pack/unpack 'from write_grid' output
832      (suggested by G. Forget)
833    
834    checkpoint57f_post
835    o add parameter "baseTime" = model base time = time at iteration zero
836      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
837      account for baseTime shift
838    o move Coriolis arrays from PARAMS.h to GRID.h
839    checkpoint57f_pre
840    
841    o mnc-ifying the seaice package
842    o introduced an alternative length scale calculation for use in the limiting
843      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
844    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
845    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
846      as well as grad(vort3).  Made it compatible with both approximate form
847      for the cubed sphere and full form of these gradients.  Added flag
848      useFullLeith to select between approximate and full form.  
849    o add "d0" in getcon.F to reduce differences between compilers/platforms
850      update output.txt of exp. fizhi-gridalt-hs
851    o change port_rand funtion to allow to set the seed.
852    o fix obscure MNC bug involving conversion between reals and integers
853      - it caused no problems with certain (eg. gcc, ifc) compilers but the
854        new version is now more standards-compliant
855    o adjoint-related modifications
856      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
857      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
858      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
859    
860    checkpoint57e_post
861    o Adding eddy stress controls a la Ferreira et al.
862    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
863    
864    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
865      update output.txt of exp. fizhi-gridalt-hs
866    o add more "Z" dimensions and associated coordinate vars to MNC
867    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
868    o parameter calendarDumps: when set, approximate months (30-31 days) and years
869      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
870      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
871      months and years.  Requires pkg/cal.
872    o diagnostics: add pickup functionality
873      - off by default for backwards compatibility
874      - current version only uses MDSIO -- MNC will be added
875    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
876    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
877    
878    checkpoint57d_post
879    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
880    o modify verification/ideal_2D_oce so that it tests the creation of mnc
881      output from the diagnostics package
882    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
883    o make genmake2 more portable by using ".$FS" instead of ".f" for more
884      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
885    o add coordinate variables to the MNC output from the diagnostics package
886    o change MNC-flags default value: true when useMNC=TRUE
887    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
888      the ability (off by default) to read the grid information using MNC
889    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
890    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
891    o do snap-shot diagnostics at the middle of the time-interval (instead of
892      at the end).
893    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
894      new test for AIM with thSIce + slab-ocean
895    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
896    o move state variable diagnostics to the beginning of the time step ;
897      (note: still needs some work specially for snap-shot diagnostics)
898      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
899    
900    checkpoint57c_post
901    o Change testing option (-ieee) to get closer agreement between g77 & ifort
902    o generate new output.txt files on faulks with g77 & the new -ieee option
903    checkpoint57c_pre
904    
905    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
906      update output.txt of exp. global_ocean.90x40x15
907    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
908      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
909    o add saltFlux(+File) forcing capability with periodicExternalForcing
910    o allow to use pkg diagnostics for GM-Redi & ThSIce output
911    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
912    o improvements for the MNC output from DIAGNOSTICS:
913      - correct handling of the unlimitied dimension
914      - all dims now have associated coordinate variables
915      - variables located at U, V, and Corner ("Z") points are now written
916        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
917        *all* data points are output
918    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
919    o added pkg/seaice/seaice_monitor.F
920    o mdsio_readfield.F can now read files visible only to master MPI process.
921    o pkg/seaice: some test code for ice-modified ocean stress
922    o exf_getffields interpolation defaults to bilinear for all scalar forcing
923      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
924      spurious negative numbers for precipitation and humidity.  Will cause
925      some small numerical differences for integrations using pkg/exf/exf_interp.F.
926    o pkg/ctrl/
927      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
928        May be enabled via doPackDiag
929      *  introduce z-scaling of
930         + gradient (doZscalePack) and
931         + control (doZscaleUnpack)
932    o pkg/mdsio/
933      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
934      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
935    
936    checkpoint57b_post
937    o simplify options in diagnostics_fill arguments (remove weird combinations)
938    o fix MNC coordinate variables so that they now contain per-face index
939      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
940      general, EXCH2 grids are only aligned to a "local" coordinate system
941    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
942    o Implement instantaneous output within pkg diagnostics:
943      setting a negative frequency in data.diagnostics produces
944     "snap-shot" output (as opposed to time-average if freq > 0)
945    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
946      NOTE: change ptracer diagnostics name: use 2 characters to work with
947            more than 9 tracers. Add also diagnostics of advect & diffus flux.
948    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
949      becomes the coordinate variable for the 'T' dimension
950    o add CF-style coordinate variables to MNC
951      - just a first cut:  numbers are meaningless on the cubesphere and
952        missing along the T axis but otherwise it works!
953    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
954    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
955    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
956      this is based directly on what the model compute, so that the content of
957      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
958    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
959    o clean up build options files for SunOS, in particular
960      - remove -traditional from xmakedepend
961      - change -xarch=v9 to -xarch=native for f77
962      - restore use of make (not gmake)
963      - add CC=gcc if using g77
964    o changes per discussion of AM, JMC, & EH3 today:
965      - move redundant "grid" variables out of "state" -- in preparation of
966        creating proper CF-style coordinate variables and in recognition
967        that any/all grid variables can be easily copied (eg. w/NCO) from
968        the grid files into any of the other NetCDF files
969      - *always* output grid variables with MDSIO (this will eventually be
970        changed)
971      - output MNC grid file if useMNC is true
972    o every instance of _END_MASTER() has been found and replaced with
973      _END_MASTER( myThid ) in order to satisfy certain picky Sun
974      preprocessors
975    o re-arrange diagnostics pkg initialisation:
976     - allow each package to extend the available diagnostics list
977     - add some checking and fix small problems (multi-threaded, ...)
978     - new S/R diagnostics_fill (replace fill_diagnostics):
979       look through the short list of active diag. (instead of the long list)
980       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
981    
982    checkpoint57a_post
983    o this set of changes restores TAMC compatibility
984      tested for global_ocean.90x40x15 adjoint on trough
985      (what a pain)
986    
987    checkpoint57a_pre
988    o some modifs in tools/build_options for sunos
989    o call ctrl_pack for ctrl at end for optimcycle=0
990    
991    checkpoint57
992    o add horizontal bi-harmonic viscosity for vertical velocity
993      - new parameter viscA4W (defaults to viscA4)
994      - affects only non-hydrostatic code
995      - to be done: no-slip lateral boundary conditions
996    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
997    o implement Implicit Vertical advection for pTracers
998    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
999      (implemented also for implicit vertical diffusion & advection)
1000    o OBCS: extend application of tracer open boundary conditions
1001      to a strip beyond the boundary of width Olx/Oly
1002    o add call monitor to TAF set of required calls (flow directives)
1003      and include in natl_box_adjoint
1004    o untangle a few ifdefs related to cost, ctrl, autodiff
1005      untangel a few ALLOW_ECCO_OPTIMIZATION
1006    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1007      (theta2, salt2 in ecco_cost_weights)
1008    
1009    checkpoint56c_post
1010    o OBCS as control variables
1011      - update ctrl_ad_diff.list, obcs_ad_diff.list
1012      - remove balance of obcs controls from default
1013      - fix index bug nobcs in ctrl_init
1014      - fix dummy fields filen in ctrl_pack
1015      - add dummy weights for obcs
1016    o lsopt: comment out fort.94 output
1017    o optim:
1018      - remove unnecessary header files
1019      - adjusted namelists
1020      - add xerbla.F to Makefile
1021    o exf:
1022      - multiple modifications of exf_check_range
1023      - unit change in exf_init_runoff from [m/year] to [m/s]
1024    o mdsio:
1025      - i/o-vector change debugLevel from debLevA to debLevB
1026    
1027    checkpoint56b_post
1028    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1029      is called from DO_THE_MODEL_IO
1030      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1031      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1032      - clean up PTRACERS_WRITE_TIMEAVE a little
1033    o add another verification experiment that tests both the cfc-pkg and
1034      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1035      reactive tendencies treated inline with regular timestepping
1036    o testreport previously did a lousy job of comparing small numbers, so
1037      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1038      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1039      testreport.
1040    o ptracers_monitor: bug fix for MPI
1041    
1042    checkpoint56a_post
1043    o GCHEM: finish reorganizating the package
1044      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1045        (introduces another 3D-array for each passive tracer, but only if
1046        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1047        gchemTendency is not needed because the timestep is done separately)
1048      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1049      - GCHEM is now---more or less cleanly---separate from PTRACERS
1050      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1051        so clear to me how that should be done in a general way.
1052    o CFC: improve formatting of output in CFC_ATMOS
1053    o PTRACERS:
1054      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1055        that ALL experiments with ptracers enable can be checked. This makes
1056        GCHEM_MONITOR obsolete.
1057      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1058        monitorFreq
1059      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1060    o add PTRACERS (PTR0[1-5]) to testreport output
1061    o exf_check_range:
1062      * default changed to .TRUE.
1063      * will check values for niter0 if debLevA, every timestep if debLevB
1064      * STOP in exf_check_range if 'out of range'
1065      * range chosen generous to allow for potential extema
1066      TBD: a version with stricter range
1067           permitted range would be runtime parameters
1068    o GMredi:
1069      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1070      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1071      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1072    o GCHEM:
1073      - move call to GCHEM_FORCING_SEP, so that it is now called before
1074        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1075      - introduced a useGCHEM runtime flag and applied it everywhere.
1076      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1077        this flag is now only visible within GCHEM-pkg routines.
1078      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1079        be replaced by a 3D array that is computed before thermodynamics; for
1080        this, the tracer ID iTracer had to be included into the parameter list
1081        of ptracers_forcing
1082      - set up forward_step to call gchem_forcing, that will replace
1083        gchem_forcing_int in ptracers_forcing
1084      - cleaning up
1085    o small cleaning of exch2: remove files that are also in eesupp/src
1086    
1087    checkpoint56
1088    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1089    o mnc: cleanup "full" files--fixes out-of-memory problem
1090    o ECCO-GODAE
1091      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1092      * fully merged and updated from SIO code
1093        windstress sign change affects
1094        - exf_inscal_[u/v]stress
1095        - sign of xx_tau[u/v] adjustments
1096        - signs in cost_scat
1097      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1098      * natl_box_adjoint updated and compressed
1099      * 2-level checkpoint switch added
1100        (tested in EXP. 1 of natl_box_adjoint)
1101      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1102    o SVD
1103      * first complete, non-hacked version for SVD calculations
1104      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1105        performed via direct access files admtlm_vector.it????
1106        (via ctrl_[un]pack)
1107      * optimcycle is used for ARPACK iteration counter
1108        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1109      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1110        and add linear transforms where necessary
1111      * controls are initial/final SST, SSS (can be extended; need to check
1112        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1113    o mdsio: filename info to both stderr, stdout
1114    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1115      from sign change
1116    
1117    checkpoint55j_post
1118    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1119      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1120    o add consistent build directories and .cvsignore files to verification
1121    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1122    o make all subroutines 30 or less characters in length for certain older
1123      compilers to work (a thorough search only turns up two routines in
1124      pkg/ptracers)
1125    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1126      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1127    
1128    checkpoint55i_post
1129    o change arrays for total vertical diffusivity (2.D if explicit,
1130      3.D if implicit) ; each ptracer uses its own background value.
1131    o added mnc/NetCDF output capability to ocn_compon_interf
1132      - added bits to verification/cpl_aim+ocn so that it can run on
1133        ITRDA and other clusters without the mpirun "-wd" option
1134    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1135      configuration
1136    o give MNC the ability to create additional files rather than
1137      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1138      - the default is just less than 2GB which is a practical limit
1139        on many systems
1140    o Compute the non-local term using either KPP vertical diffusivity (=default)
1141       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1142    
1143    checkpoint55h_post
1144    o add verification test "vermix"
1145    o remove all the *_ioinc flags and replace with the single global
1146      outputTypesInclusive flag
1147    o allow to set a vertical profile of vertical diffusivity for T & S
1148    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1149    o useMNC moved from data.mnc to data.pkg
1150    
1151    checkpoint55g_post
1152    o Renaming carbon AD experiments to comply with testreport conventions
1153    o Updating adjoint of Held-Suarez hs94.1x64x5
1154    o Fixing directives for non-ECCO forward_step, after ECCO directives
1155      have been fixed to avoid recomp. of do_oceanic_phys
1156      Works well for global_ocean.90x40x15,
1157      but recomp. issue remains for carbon
1158    o Updating adjoint output for natl_box_adjoint after
1159      pkg/ecco has been modified (see taga c55d_post)
1160    
1161    checkpoint55f_post
1162    o rename to timeave_init_fixed
1163    
1164    checkpoint55e_post
1165    o some delicate re-shuffle of store directives to avoid one
1166      extra call of do_oceanic_physics
1167      affects ecco_the_main_loop.F, do_oceanic_physics.F
1168      checkpoint_lev1_directives.h
1169    o NB: this may break global_ocean adjoint temporarily,
1170      but it is clear how to fix it. Will do later, need this now.
1171    
1172    checkpoint55d_post
1173    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1174    o ecco_cost_weights is modified to 1x1 runs
1175    o modifs to allow observations to be read in as
1176      single file or yearly files
1177    o enable to read exf forcing fields as either
1178      single file or yearly files (flag useExfYearlyFields)
1179    checkpoint55d_pre
1180    
1181    o switch between 2-level and 3-level checkpointing
1182    o add ability of MNC to write local and "partial" (eg. 2D slices where
1183      the full 3D field is never actually stored) arrays to NetCDF files
1184      with the correct (that is, the complete multi-dimensional) set of
1185      array indicies
1186      - used in mom_vecinv() to write the diagFreq output
1187      - tested (demonstrated) in verification/aim.5l_cs
1188    o further mnc-ification
1189      - add verification/lab_sea to the list with mnc setups
1190      - fix undefined mnc v-names in cd_code
1191      - add kpp to mnc output (both snapshot and timeave)
1192    o non-hydrostatic code
1193      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1194        in calc_gw.F
1195      - defaults to viscAh
1196      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1197        friction or Leith) in non-hydrostatic mode, as long as there is
1198        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1199    o pkg/cost
1200      extend simple cost functions to treat time mean quantities
1201      (T,U,V) via cost_accumulate_state from cost_tile
1202    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1203        be 2 times larger than the minimum size the advection scheme requires.
1204        now get a perfect conservation of salt in advect_cs test-exp (updated)
1205    o GGL90 (Gaspar's TKE mixed layer)
1206      - add horizontal diffusion of TKE, requires exchanges in
1207        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1208        default. In OPA there is no horizontal diffusion of TKE but the
1209        mixing coefficients are computed from a horizontal average of TKE of
1210        6 points or so. I think that diffusion has a little more physical
1211        justification.
1212      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1213        was in vain)
1214      - mask tke-variable in ggl90_init
1215    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1216    o fix biharmonic diffusion on CS-grid.
1217    o more obcs stuff
1218      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1219        for reading boundary values. This routine is called from
1220        obcs_prescribe_read
1221      - updated obcs_check
1222      - changed sponge layer relaxation parameter units for days to seconds
1223      - turned off sponge layer by default
1224      - changed argument list of OBCS_CALC to myTime+deltaTclock
1225      - fixed about 35 bugs in obcs_external_fields_load
1226    
1227    checkpoint55c_post
1228    o obcs stuff
1229      - new runtime flags useOBCSprescribe, useOBCSbalance
1230      - re-arranged obcs_calc
1231      - moved exf_getobcs to obcs_prescibe_read
1232        obcs_prescibe_read is called after ORLANSKI stuff
1233        and independent of it (executable can contain all).
1234      - updated obcs_check
1235      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1236        These may be necessary only if tangential velocities are
1237        prescribed at OB, not sure, needs testing.
1238    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1239      which simplifies the calls and passes the ifc check-bounds test
1240    
1241    checkpoint55b_post
1242    o add a 2D scalar, Z location, exchange_2 routine.
1243    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1244      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1245      affects advect_cs results (for the wrong reason): update output.txt
1246    o use a more standard discretization for biharmonic viscosity ;
1247     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1248      affects results of dome set-up: update output.txt
1249    o fix gad_advection.F (CubedSphere part), back to version 1.23
1250    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1251    
1252    checkpoint55a_post
1253    o merged code to
1254      * prescribe/read time-dependent open boundaries
1255        (works in conjunction with exf, cal)
1256      * sponge layer code for open boundaries
1257      * each boundary N/S/E/W now has its own CPP option
1258        (healthy for the adjoint)
1259    
1260    checkpoint55
1261    o up-to-date adjoint of previous breaks
1262      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1263      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1264      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1265      - carbon: * remove tr1-related adjoint verification
1266                * add ptracer as control variable
1267    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1268      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1269    
1270    checkpoint54f_post
1271    o in verification/carbin/ remove experiment related to
1272      ALLOW_PASSIVE_TRACER (array tr1 etc)
1273      code_ad/ input_ad/ results_ad
1274    
1275    o add two new packages
1276      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1277        + subject to optimization (memory)
1278      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1279        + subject to reordering (many GOTOs in the original code)
1280        + so far opps is called for every (i,j) point, and then operates in
1281          the vertical; one may want to reorder the scheme in order operate in
1282          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1283          fields)
1284    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1285      - all verification tests compile and run with linux_ia32_g77
1286      - defaults are compatible with current input files--nothing
1287        should change if you were not previously using MNC
1288      - MNC output has been added in numerous places (eg. timeave)
1289        but there are still a few writes not yet do-able with MNC
1290        (this is in progress)
1291      - flags now allow for either/or/both use of MDSIO and MNC and
1292        documentation will soon follow
1293      - numerous small formatting cleanups for ProTeX
1294    o add version info (via BUILD_INFO.h) to MNC and stdout
1295    
1296    checkpoint54e_post
1297    o add two new packages
1298      - pp81 (Packanowski and Philander, 1981), Richardson number and
1299        stratification dependent mixing
1300      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1301      - these scheme operate in a similar manner as KPP (without ghat, of
1302        course), however there is only one diffusivity that is used for both
1303        temperature and salinity (and passive tracers)ç
1304    o add offline package
1305    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1306      provided by Stephanie Dutkiewicz
1307    o genmake2: add ability to search for C compilers and cleanup test output
1308      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1309    
1310    checkpoint54d_post
1311    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1312    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1313      leading to additional shift by 5 days each year of integration
1314       (i.e. leading to considerable offset over the years)
1315    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1316    o start with no AB and no initial filtering (staggerTimeStep):
1317      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1318    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1319      (external loading & cpl import/export stay in forward_step.F)
1320    o update coupling interface to work with new staggerTimeStep
1321    o change MDSIO ptracers_pickup.
1322    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1323    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1324    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1325    
1326    checkpoint54c_post
1327    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1328      this affects (truncation error) output.txt of test-exp:
1329       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1330    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1331    o change Qnet to always be the net heat flux, (+upward).
1332      affects (truncation error) output of natl_box exp.: updated
1333    o define the max number of passive tracers in PTRACERS_SIZE.h
1334    o start to test mnc routinely in exp0
1335    o add sea-ice loading (sIceLoad) as a new forcing field.
1336    
1337    checkpoint54b_post
1338    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1339       impressive on Altix and Opteron systems)
1340    o diagnostics can now write NetCDF files through the mnc package
1341    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1342    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1343    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1344      affects (truncation error) output of lab_sea & natl_box exp.: updated
1345    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1346    
1347    checkpoint54a_post
1348    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1349    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1350    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1351    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1352      + internal_wave (shift in writing cg2d_ini_res)
1353    checkpoint54a_pre
1354    
1355    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1356      - modified verification/lab_sea and natl_box_adjoint accordingly
1357    
1358    checkpoint54
1359    checkpoint53g_post
1360    o prepare splitting of thermodynamics: store convect.counter in common block
1361    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1362      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1363    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1364    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1365    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1366    o restore adjointability
1367    
1368    checkpoint53f_post
1369    o modifications that affect AIM experiment results (update output.txt):
1370      - no advection of S at top interface Nr (pkg/generic_advdiff)
1371      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1372    o AIM pkg:
1373      - include stability function into surf.Flux derivative relative to Tsurf
1374      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1375    
1376    checkpoint53e_post
1377    o merged cylindrical coord configuration
1378    o added rotating_tank experiment
1379    checkpoint53e_pre
1380    
1381    checkpoint53d_post
1382    o faulks upgraded: re-generate output.txt that have changed:
1383       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1384    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1385    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1386    o added Sadourny discretization of Coriolis
1387      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1388      - re-enabled use of omega3 (useAbsVorticity)
1389    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1390      vector-invariant equations
1391      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1392    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1393      hopefully without new bugs
1394      - still to do: biharmonic friction for non-hydrostatic w
1395    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1396    o regenerated output for global_ocean_ebm (using -ieee)
1397    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1398      of mom_common/
1399      - simple re-arrangement of instructions within computing loop
1400    checkpoint53d_pre
1401    
1402    checkpoint53c_post
1403    o new version of coupler for AIM+thSIce and Ocean models
1404     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1405     - land: change Evaporation of snow
1406     - aim with thSIce: fix bug in snow-precip.
1407    o changes to calc_gw.F
1408     - bug fix for w^2 term near the bottom boundary
1409     - (hopefully) improve the lateral slip boundary condtions for use with
1410        partial/looped cells
1411      - because the bug fix changes two verification experiments anyway (exp5
1412        and plume on slope), change the lateral boundary condition from half slip
1413        to the value of no_slip_sides
1414    o ebm package wasnt quite up to the parallel task. Fixed that.
1415    o Adjoint of EBM package + verification
1416      * TLM OK
1417      * ADM not sufficient accuracy yet (needs further testing)
1418    
1419    checkpoint53b_post
1420    o Commiting new energy balance model to repository
1421      * package is pkg/ebm
1422      * verif. is verification/global_ocean_ebm
1423      * references are in ebm_driver.F
1424    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1425    C        Global thermohaline circulation. Part I:
1426    C        Sensitivity to atmospheric moisture transport.
1427    C        J. Climate 12(1), 71-82
1428    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1429    C        Global thermohaline circulation. Part II:
1430    C        Sensitivity with interactive transport.
1431    C        J. Climate 12(1), 83-91
1432    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1433    C        Destabilization of the thermohaline circulation
1434    C        by atmospheric eddy transports.
1435    C        J. Climate 7(12), 1870-1882
1436    o Will need long integration testing.
1437    checkpoint53b_pre
1438    
1439    o created pkg/mom_common in preparation for variable viscosity code
1440    o renamed and split ini_mnc_io
1441    o pkg/land: only liquid water can diffuse or run-off
1442    o AIM using land: soil wetness availability account for snow
1443    o added printMapIncludesZeros to EEPARMS namelist
1444    
1445    checkpoint53a_post
1446    o restore TAMC compatiility for exf_constants.h
1447      (no usage of _d in .h)
1448    o Additional storing in KPP in an attempt to fix
1449      TAMC problem with adjoint of KPP code.
1450      (no success...)
1451      Identical code works fine with TAF.
1452    o Fixed verification/natl_box_adjoint experiments.
1453      Initial conditions for Experiments 4 and 5 are now
1454      set to "SEAICE_initialHEFF=0", which is more reasonable,
1455      and hence gives results closer to that of Experiment 2.
1456      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1457    
1458    checkpoint53
1459    o stable checkpoint with up to date adjoint
1460      TLM tests only run for 1st grdchk at the moment. Its unclear if
1461      this is a code problem or a problem with resetting code for g_
1462      variables that is being autogenerated wrong.
1463      Otherwise:
1464       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1465       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1466         are both still in chaos following their security messes.
1467    
1468    checkpoint52n_post
1469    o various build (mostly genmake2) changes including:
1470      - ability to build/run more easily within Cygwin and MacOS X
1471      - more complicated Makefiles with a stronger dependence on Gnu Make
1472    o pkg/seaice modifications
1473      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1474        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1475        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1476      - changed proxy for geostrophic velocity and updated
1477        verification/lab_sea/results/* accordingly
1478      - removed ADI dynamic solver from pkg/seaice
1479      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1480        they caused a segmentation fault under certain circumstances
1481      - removed unused field WATR
1482    o bug fix in exf-package:
1483      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1484         now reflect that.
1485    o small fixes in the cal-package:
1486      - set reference date to first of January for the 'model'-calendar
1487      - failing of cal_CheckDate in cal_FullDate now actually results in a
1488        warning
1489    o small modifications in exf-package to increase flexibility:
1490      - change climtempfreeze from a constant to a runtime parameter that
1491        is specified in data.exf_clim (default = -1.9)
1492      - introduce runtime parameter windstressmax (default = 2.0) that is
1493        specified in data.exf
1494    o fix in pkg/thsice:
1495      - update Evap (Tsf changes) to be consistent with Latent heat flux
1496      - maintain snow precipitation unchanged (even if Tsf >=0).
1497     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1498    
1499    checkpoint52m_post
1500    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1501      this does not change any of the results, because myIter=0 in swfrac always
1502      lead to jwtype=2 (the default anyway), but the call makes little sense
1503      as a default
1504    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1505    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1506      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1507    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1508    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1509    o extending useSingleCpuIO option to work with new exch2 I/O format
1510      - old-style, missing-tile I/O is still accessible by defining CPP
1511        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1512    o monitor package can write to NetCDF files and/or STDOUT
1513    o fix re-definition bug in MNC_GRID_INIT_ALL()
1514    o doc/api_reference added
1515      - a framework for building an API Reference Manual using all
1516        the "protex" comments embedded in the code
1517      - see pkg/generic_advdiff, pkg/mnc for examples
1518    o MNC:
1519      - make myThid the last argument for all subroutines
1520      - new default for the grid files: NO halos
1521      - add useMNC and other run-time flags
1522      - separate per-file-group handling of the unlimited dimension
1523      - early initialization of MNC w/ flags read at the eeboot stage
1524        and lookup tables set in initialize_fixed
1525      - write all MNC output to a freshly-created directory
1526    o thermodynamics sea-ice (thsice) is now tested with testreport.
1527    o test exp. advect_cs: use the standard cs32 grid ; update output.
1528    o Added functionality to grdchk:
1529      pick global i,j,k position (or nearest wet) where to perform check.
1530    
1531    checkpoint52l_post
1532    o new land formulation:
1533      a) use ground enthalpy as prognostic variable to ensure exact
1534         energy conservation.
1535      b) account for water temperature and for latent heat of freezing
1536         in all processes (rain, run-off, ground storage)
1537      c) compute surface and ground temperature implicitly.
1538    o aim_v23 modification for new land model:
1539      a) Treat separately land / ocean / sea-ice surface fluxes
1540         to allow implicit computation of land & sea-ice surface temp.
1541      b) add snow precipitation.
1542    checkpoint52l_pre
1543    
1544    o fix problem (when 1 tile is empty) in min/max monitor.
1545    o fix bug in timeAve (u,vZetatave in common block)
1546    o no restoring terms under ice for pkg/seaice
1547    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1548    o bug fix for pkg/seaice pickups
1549    o change MNC call locations and add coordinate attributes
1550    o mask vorticity at the corner ; affects global_ocean.cs output
1551    o fix ini_curvilinear_grid ; test CS experiments with mpi
1552    o aim.5l_cs: modify sea-ice fraction input file ; update output
1553    o exf: Adding simple range check routine for exf fields after read
1554    
1555    checkpoint52k_post
1556    o removed top-level directory "diags"
1557      - we migrated these functions to pkg/timeave a long time ago
1558    o fixed bug introduced in pkg/monitor
1559    o accuracy ctrlprec = 32 insuffient for gradient checks using
1560      averaged fields (I/O via cost_averages)
1561      -> use ctrl.h in active_file*.F to control I/O precision.
1562    o paramter list of CALL ADTHE_MAIN_LOOP
1563    o added initial do_the_model_io to ecco
1564    o set all ...Freq to zero after cost_final
1565      taveFreq, dumpFreq, pChkptFreq
1566    o MAIN and ECCO differentiability restored
1567    
1568    checkpoint52j_post
1569    o fix nchklev in tamc.h for global_ocean...
1570    o Bringing flow and store directives up-to-date
1571    o Really weird thing!
1572      call do_the_model_io from the_main_loop with parameters
1573      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1574      TAF places a faulty re-call of initialise_varia
1575      after cost_final call which should not be there!
1576    checkpoint52j_pre
1577    
1578    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1579      error messages
1580    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1581    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1582      debug output
1583    o modfied mdsio_writefield.F to handle non-global files under exch2
1584    o update AIM Cubed-Sphere exp (aim.5l_cs):
1585      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1586    o update AIM Equatorial Channel exp:
1587      use standard aim_v23 pkg and change the SST fields to be more realistic.
1588    o globalFile now works with exch2
1589    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1590      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1591    o limit timeave output for hi-res integrations
1592    
1593    checkpoint52i_post
1594    o removed CPP_EEOPTIONS.h from verification/*/code
1595    o updated the tiling for global_ocean_pressure
1596    checkpoint52i_pre
1597    
1598    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1599      the old pkg/aim).
1600    
1601    checkpoint52h_pre
1602    o shortened offending lines in exch2_send_rx?.template
1603    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1604    o genmake2: add build & execute test for NetCDF code
1605    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1606      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1607    o added useSingleCPUIO flag to monitor.F and mon_out.F
1608    o added temporary hack for sea-ice dynamics on the cube:
1609      metric terms are ignored and it is assumed that
1610      there is no sea-ice on cube faces 1, 2, 4, and 5.
1611    
1612    checkpoint52f_post
1613    o added exch2 cube routines to pkg/exch2
1614    o modified hs94.cs-32x32x5 to use it
1615    o added new grid files to hs94.cs-32x32x5
1616    checkpoint52f_pre
1617    
1618    checkpoint52e_post
1619    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1620      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1621    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1622      to work with implicit vertical advection and AB ;
1623    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1624    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1625     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1626    checkpoint52e_pre
1627    
1628    o fix bug in impldiff when Nr=1 or Nr=2.
1629    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1630    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1631    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1632      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1633    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1634    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1635    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1636    
1637    checkpoint52d_post
1638    o re-tiled many expts to allow comparison in multi-processor mode
1639      - updated output accordingly
1640      - changed hs94.128x64x5 to use intial T from file rather than use the
1641        random number generator
1642    o add infrastructure in model routines for fizhi and gridalt packages
1643    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1644    o changes to permit hi-res, cubed-sphere, configuration
1645      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1646      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1647      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1648        of surface winds for the cube
1649      (A verification experiment, based on global_ocean.cs32x15, but with
1650       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1651       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1652       complete with example surface forcing files and matlab scripts to look
1653       at the output and compare it with that of global_ocean.cs32x15.)
1654    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1655       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1656       to conform to the common rule.
1657    o check-in the first version of the coupler + interfaces for multi-components
1658       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1659       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1660       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1661       - ocean and atmos. share the same horizontal grid (no interpolation).
1662       - exchanges between component and coupler is done in forward_step
1663    o new verification experiment, cpl_aim+ocn:
1664       coupled ocean - AIM atmosphere on cs32 grid.
1665    
1666    checkpoint52d_pre
1667    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1668    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1669    
1670    checkpoint52c_post
1671    o Fixing OPTIONS files for use of exf:
1672      - ALLOW_ECCO not needed
1673      - ECCO_CPPOPTIONS.h should not be included from
1674        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1675        as has been the case in the past
1676      - All cal/exf related options are currently set in
1677        single header file. Should remain so until we
1678        agree on a consistent new policy.
1679    o Removed all CPP options for cal package.
1680      cal has no more CPP options.
1681    o modified STOREs in GAD_ADVECTION
1682    o corrected key comp. for passkey
1683    
1684    checkpoint52b_post
1685    o new version: "thsice" of thermodynamic sea-ice pkg:
1686     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1687     - modify fluxes but do not change theta directly;
1688     - light cleaning of bulk_force pkg (still needed with thsice).
1689     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1690       + output_thsice.txt to test thsice & bulk_force pkgs.
1691    o put back grid & coriolis monitor output.
1692    checkpoint52b_pre
1693    
1694    o call "do_the_model_io" at the beginning (=> dump initial state)
1695    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1696    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1697      (need info on NUMBER_OF_PTRACERS)
1698    o missing PTRACERS headers in some routines
1699    o default tamc.h in pkg/autodiff supposed to crash
1700      to ensure proper customization
1701    
1702    checkpoint52a_post
1703    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1704      - moved surfaceTendencyTice from pkg/seaice to main code
1705      - subroutine FREEZE_SURFACE now limits only surface temperature
1706        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1707        => new output.txt for global_ocean.cs32x15 & global_with_exf
1708      - keep the old version of FREEZE for backward compatibility;
1709        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1710      - corresponding modifs for TAF directives
1711    o added surface flux output variables to TIMEAVE_STATVARS
1712    o time-averaged output for pkg/ptracers
1713    o fix problem with ECCO-related divided adjoint
1714      snapshot file was missing some ad-variables,
1715      but no warning issued by TAF
1716    
1717    checkpoint52a_pre
1718    o some bug fixes for #undef REAL4_IS_SLOW
1719    
1720    checkpoint52 = ecco_c52_e35
1721    o after testing adjoints of checkpoint51u_post
1722    
1723    checkpoint51u_post
1724    o this is the post-merge tag of the ecco-branch
1725      (needs another clean checkout and re-testing)
1726    o various natl_box_adjoint configs and results
1727      but no input fields
1728    o obcs adjoint not yet merged!
1729    o adding ECCO global 1x1 and 2x2 degree configs
1730    o updated/extended some store directives for seaice
1731    o pkg/ecco now containes ecco-specific part of cost function
1732    o top level routines the_main_loop, forward_step
1733      supersede those in model/src/
1734      previous input data.cost now in data.ecco
1735      (new namelist ecco_cost_nml)
1736    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1737    
1738    checkpoint51t_post
1739    o this is the pre-merge tag of the ecco-branch
1740    
1741    checkpoint51s_post
1742    o cleanup: removed various obsolete #define-s
1743    o pkg/grdchk
1744      - renamed 'ph-grd 3' to 'grad-res'
1745      - merged from ecco-branch
1746        (remaining bug fixes for obcs gradient checks)
1747      - additional high-precision output for testreport
1748        (grep for 'precision_grdchk_result')
1749    
1750    checkpoint51r_post
1751    o cleaned up or removed CPP_OPTIONS.h files
1752    o updated results for some of the tests to reflect the new
1753      optfiles (-ieee: -O0 instead of -O3)
1754    
1755    checkpoint51q_post
1756    o cd_code:
1757      - moved cd_scheme.F -> cd_code_scheme.F
1758      - separate read_checkpoint from cd_code_ini_vars.F
1759      - separated cd_code part from write_checkpoint
1760      - updated AD_SOURCE, generated .flow
1761      - added CD_CODE_VARS.h to the_main_loop
1762      - Moving cd_code specific store dir.s to pkg/cd_code
1763    o ctrl package totally restructured
1764      - pack/unpack now optional and decoupled from
1765        xx_/adxx_ I/O
1766      - ctrl_pack/unpack cleaned
1767        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1768      - confined inclusion of AD_CONFIG.h to where necessary.
1769    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1770    
1771    checkpoint51p_post
1772    o create initial cd_code package
1773      - WARNING: the initialization of fields within packages
1774        is broken because INI_FIELDS (where READ_CHECKPOINT is
1775        called) is called *before* PACKAGES_INIT_VARIABLES.
1776        This seems to be backwards since
1777        1) its important to initially zero the entire field including
1778           the "halo" region
1779        2) zeroing needs to be done *before* reading pickup info
1780           and the pickup call might or might not happen in any
1781           particular run
1782      - this needs an overhaul for R2
1783    o cleanup verification/*/code/GMREDI_OPTIONS.h
1784    o cleanup testreport
1785    
1786    checkpoint51o_post
1787    o bringing AD-related verif's up to date with genmake2
1788      - carbon/
1789      - global_ocean.90x40x15/
1790      - hs.94.1x64x5/
1791      - (front_relax/ )
1792    o (more) consistent directory structure for AD-related verif.'s
1793    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1794    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1795    o bug fix in find_alpha.F for MDJWF:
1796      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1797        change rho -> rho-rhoConst
1798      - replace call find_rho to find_rhonum
1799    o initialisation of rFlx extended to full array (required by TAF)
1800      and shifted to thermodynamics
1801    o removed PTRACERS.h in ptracers routine
1802    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1803    o Correcting initialisations for fVerU, fVerV.
1804    o helping TAF to recognize dependency on kUp for
1805      fVerU, fVerV
1806    o Replacing delZ by delR in pkg/ctrl/
1807    checkpoint51o_pre
1808    
1809    o undid all of cp51 pending some cleanups and discussion
1810    o added the [#include "AD_CONFIG.h"] statement to all files that need
1811       it for adjoint/tl #defines
1812     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1813     o removed tools/genmake since it no longer works
1814    
1815    checkpoint51n_post
1816    o modifications to make FREEZE flux visible to pkg/kpp
1817      - moved surfaceTendencyTice from pkg/seaice to main code
1818      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1819      - subroutine FREEZE now limits only surface temperature
1820        (this means new output.txt for global_ocean.90x40x15,
1821         global_ocean.cs32x15, and global_with_exf)
1822    o added surface flux output variables to TIMEAVE_STATVARS
1823    
1824    checkpoint51n_pre
1825    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1826    o added [#include "AD_CONFIG.h"] to all files that use the following
1827      defines:
1828      - ALLOW_ADJOINT_RUN
1829      - ALLOW_TANGENTLINEAR_RUN
1830      - ALLOW_ECCO_OPTIMIZATION
1831    
1832    checkpoint51m_post
1833    o incorporating changes to get TAMC/TAF working in genmake2
1834      - added new TAMC/TAF targets to the Makefile
1835      - various cleanups related to package handling
1836      - these changes should have no impact on the forward model
1837    
1838    checkpoint51l_post
1839    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1840     - faster algorithm for cal_addtime.F
1841     - higher precision arithmetic, where needed
1842     - pkg/exf *startdate variables changed from calendar date to
1843       model integration time
1844    
1845    checkpoint51l_pre
1846    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1847    o enable to apply restoring on S & T only in a latitude band.
1848    o update output (external_forcing_surf modif. change truncation errors)
1849       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1850    
1851    checkpoint51k_post
1852    o change default to: useNHMTerms=.FALSE.
1853     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1854       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1855     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1856        exp1, ideal_2D_oce
1857     - change data file of oceanic exp (leave the results unchanged for now)
1858       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1859    o set gravitySign automatically according to the vertical coordinate used
1860      (and change sign: back to "logical" value: +1 when R increases downward)
1861    o added an include barrier to the default CPP_OPTIONS.h and
1862      removed the #include "PACKAGES_CONFIG.h" from it
1863    o fix a bug in mom_fluxform (from chk51j_post)
1864    
1865    checkpoint51j_post
1866    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1867    o adjusted some flow directives (dynamics, thermodynamics)
1868    o added cubed-sphere case to test cost function
1869    o heckpoint_lev?_directives.h now include
1870      pkg-specific directives, whenever those are enabled.
1871    o Moving pkg-specific flow directives to corresponding pkg
1872      Moving pkg-specific differentiation list to corresponding pkg
1873      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1874      ---> conventions are
1875           - pkg_ad.flow
1876           - pkg_ad_diff.list
1877           - pkg_ad_check_lev?_dir.h
1878    
1879    checkpoint51i_post
1880    o merge of the branch-genmake2
1881      - knowingly breaks the older genmake
1882      - automatic generation of all ALLOW_${PKG_NAME} defines
1883      - new testreport supersedes older testscript
1884    o large number of package inclusion and header cleanups
1885    checkpoint51i_pre
1886    
1887    o new output for adjoin of global ocean vector invariant
1888    o fix for checkpoint of thermodynamic seaice and bulk_force
1889    o Steph gchem various cleanups
1890    
1891    checkpoint 51h_pre
1892    o fixed some single quotes
1893    o modify gchem pkg to be more versatile
1894    o modifications to clean up dic pkg
1895    o add pkg/cfc
1896    
1897    checkpoint51g_post
1898    o provide links for ARPACK and ADM*TLM
1899    o start removing verification/vero/
1900    o update AD-related stuff
1901      (in particular some IF-statements in model/src/ routines)
1902    o adding to verification/global_ocean.90x40x15/ adjoint of
1903      vector invariant setup
1904    
1905    checkpoint51f_post
1906    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1907    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1908      of tracer Green's fucntions for ocean inversion project.
1909    
1910    checkpoint51f_pre
1911    o Added on-the-fly spatial interpolation capability
1912        "USE_EXF_INTERPOLATION" to pkg/exf.
1913      - This is a temporary Cartesian-grid hack until
1914        the super-duper ESMF coupler becomes available.
1915      - See verification/global_with_exf/README for usage example.
1916      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1917        flags and modified pkg/seaice accordingly.
1918    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1919        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1920        non-local transport term.
1921    
1922    checkpoint51e_post
1923    o pkg/mom_vecinv:
1924      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1925      - add time-ave diagnostic of vorticity advection.
1926    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1927    o atmospheric geopotential: - include water vapor effect;
1928                                - use p^kappa in p* scaling.
1929    o land pkg: read initial state from files.
1930    o AIM : add stratospheric drag in the upper level
1931    
1932    checkpoint51d_post
1933    o change function ILNBLNK (=> last non-blank char.) to return zero
1934      (instead of the string length) when the string. char is empty
1935    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1936    o modif's to restore TAMC compatibility
1937      - avoid "_d" constructs in PARAMETER declarations
1938      - avoid interrupting lines by comment lines
1939    o Use cluster local disks for purely local I/O
1940      vs. globally visible disks needed for ctrl stuff
1941      (merged from ecco-branch)
1942      - new active_file_loc... and mdsio_..._loc routines
1943      - affected packages: autodiff, ctrl, grdchk, mdsio
1944    
1945    checkpoint51c_post
1946    o introducing integer flag debugLevel
1947      - debLevZero: suppress all output
1948      - debLevA: standard
1949      - debLevB: equivalent to current debugMode=.TRUE.
1950    o introducing pathname variable mdsioLocalDir for mdsio
1951      that can be specified at runtime
1952      (relevant for cluster I/O to local disk)
1953    `
1954    >>>checkpoint51b_post
1955    adjoint of ptracers
1956    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1957    o extended state in checkpoint_lev?, etc.
1958    o alternative ctrl/cost with tr1 or ptracer
1959    o new comlev1_bibj_ptracers
1960    o new ptracers.flow
1961    o made ptracers_forcing same as external_forcing_s
1962    o added verification for adjoint with ptracers
1963      - adm. grdchk fail so far
1964      - tlm. grdchk OK
1965      - checked tapelev/comlev recomputations: OK
1966    <<<checkpoint51b_pre
1967    
1968    checkpoint51a_post
1969    o added code for biogeochemistry package
1970      - new pkgs: dic, gchem
1971      - new subroutine in ptracers
1972    o modify code for biogeo packages
1973      - in model/src and pkg/ptracers
1974    
1975    checkpoint51
1976    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1977      - autodiff, ctrl, exf, grdchk, seaice
1978      kept separate packages
1979      - cost, ecco, obcs
1980    o updating verification/internal_wave, verification/lab_sea
1981      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1982    
1983    checkpoint50i_post
1984    o Preparing next differentiable checkpoint and sync
1985      of MAIN vs. ecco-branch
1986      - 1st step: this one is differentiable
1987      - 2nd step: next(! not this) checkpoint will have updated packages
1988                  from ecco-branch)
1989    
1990    checkpoint50h_post
1991    o new package "land": provide surface BC for AIM.
1992    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1993    o AIM: use true log-P extrapolation for near surface temp (= as in
1994        F.Molteni paper) ; update aim.5l_cs output.
1995    o New variable in PARM03 for more flexible pickups
1996    o somewhat cleaned package initialisation sequence for
1997      ctrl/ cost/ ecco/ in packages_... routines
1998    
1999    checkpoint50g_post
2000    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2001      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2002      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2003        made the default because of faster convergence than ADI
2004    
2005    checkpoint50f_post
2006    o exf totally restructured
2007      - replaced all exf_set_ routines by one generic exf_set_gen.F
2008        and made sure it's still differentiable
2009      - split exf_getffields.F into new exf_bulkformulae.F
2010      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2011      - updated adjoint/makefile and relevant verif. accordingly
2012    
2013    checkpoint50f_pre
2014     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2015          + change Evap over land. (update aim.5l_cs output)
2016     o added missing .cvsignores and made uniform across expts
2017     o changed configuration of tidal_basin_2d expt
2018     o added pkg/debug functions for tracing code in fatal crashes
2019     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2020     o new fn in pkg/monitor to stop model if solution grows too big
2021     o removed lots of single quotes from comments
2022    
2023    checkpoint50e_post
2024    o make KPP work with PTRACERS
2025     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2026       nearly a copy of kpp_transport_s
2027     - there is no analogue to SurfaceTendencyS, so I have to use
2028       gPtr(of the surface layer) instead
2029    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2030    checkpoint50e_pre
2031    
2032    checkpoint50d_post
2033    o change kpp output from multiple-record state files to single-record state
2034      files analogous to write_state.F
2035    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2036      analogous to the cg2d-related output.
2037    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2038      so that writing to internal file fn (with length 512) fails.
2039    checkpoint50d_pre
2040    
2041    checkpoint50c_post
2042    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2043    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2044    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2045    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2046    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2047    
2048    checkpoint50c_pre
2049    Merging from release1_p13:
2050    o bug fix for pkg/seaice dynamic solver
2051    o Added SEAICE_initialHEFF to pkg/seaice
2052    
2053    checkpoint50b_post
2054    o store u*,v* in gU,V instead of in guNm1,gvNm1
2055    o in order to put the momForcing out of the Adams-Bashforth:
2056      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2057      to timestep.F
2058    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2059    o re-generate output for highly sensitive test-exp:
2060       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2061    
2062    checkpoint50b_pre
2063    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2064    o corrected CPP option mismatch in exf_Bulk... functions for case
2065      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2066    
2067    checkpoint50a_post
2068    o Bug fix for merging between c50 and KPP.
2069      ikey was passed from thermodynamics to kpp_calc via
2070      common block rather than being recomputed in kpp_calc,
2071      in contradiction with new key itdkey.
2072      New key ikppkey created, and tamc.h headers updated.
2073    
2074    checkpoint50
2075    - 2nd step of merge with ecco-branch:
2076      merge changes in ecco-branch back into main trunk
2077    - bug fix in find_alpha
2078    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2079    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2080    - merged some sliced AD support routines
2081    
2082    checkpoint49
2083    merged from ecco-branch:
2084    o exf:
2085      - Enable initialisation of forcing fields to constant
2086        (runtime) values.
2087      - in exf_getffields.F
2088        Reduce i-/j-loop to interior domain, discarding overlaps.
2089        That also fixes wrong TAF-key computations for key_1, key_2
2090        with bulf formulae.
2091      - exf_init.F modify #ifdef for exf_init_evap
2092      - exf_getffieldrec.F, ctrl_getrec.F
2093        The following INT-usages are not safe:
2094          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2095          fldcount = int(fldsecs/fldperiod) + 1
2096        and were modified.
2097    o autodiff: checkpoint_lev...
2098      - updated storing for bulk formulae (some arrays were missing)
2099      - added state for seaice package
2100      - synchronized with main branch
2101    o DIVA:
2102      Modif.s in
2103      - the_main_loop.F
2104      - the_model_main.F
2105      and added cost_final_restore.F cost_final_store.F
2106      o With these changes, it is possible to fully separate
2107        the first forward run to compute the cost function (mdthe_main_loop)
2108        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2109        into separate model executions.
2110        This enables better tuning of DIVA to given queue sizes.
2111      o Loss of cost function value in consecutive DIVA runs is
2112        fixed by storing to 'costfinal' file.
2113      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2114        beginning/end of adjoint integration is accounted for.
2115      The current changes apply to TAF-1.4.26.
2116      TAF has one remaining bug, requiring one manual change
2117      (see MITgcm manual).
2118    o cal: synchronized between MAIN and ecco-branch
2119    
2120    checkpoint48i_post
2121    o Changes to restore differentiability of code w.r.t. previous tag
2122      (mostly adding new routines to make list and replacing
2123      pressure by totPhiHyd).
2124    o Updated and merged grdchk package
2125      - has both ADM and TLM checks
2126      - works for single- and multi-proc.
2127      - output cleaned
2128      - worked successfully for parallel DIVA
2129    o genmake:
2130      - Adding -platform=SP4
2131      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2132    o Modif. for DIVA:
2133      ctrl_unpack should not be called in intermediate DIVA interval.
2134      (similar thing would apply for active files such as
2135      tbar, sbar, psbar, which should not be reinitialised;
2136      only relevant for ecco-branch)
2137    
2138    checkpoint48h_post
2139    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2140    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2141    o Added SEAICE_initialHEFF to pkg/seaice
2142    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2143    
2144    checkpoint48g_post
2145    --- EOS:
2146    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2147      store total Potential in totPhyHyd for diagnostics & EOS.
2148    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2149    --- Pressure/geopotential gradient:
2150    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2151    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2152      ( changes results of global_ocean_pressure )
2153    o NLFS + z-coord.: add eta*Rho' contribution.
2154    o accurate phiHyd when using interface-W at the middle between 2 centers
2155     ( changes results of ideal_2D_oce )
2156    o includes r* 2nd term in potential gradient.
2157    
2158    checkpoint48f_post
2159    Merging from release1_p12:
2160    o Modifications for using pkg/exf with pkg/seaice
2161      - improved description of the various forcing configurations
2162      - added basic radiation bulk formulae to pkg/exf
2163      - units/sign fix for evap computation in exf_getffields.F
2164      - updated verification/global_with_exf/results/output.txt
2165    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2166      (SBO) core products, including oceanic mass, center-of-mass,
2167      angular, and bottom pressure (see pkg/sbo/README.sbo).
2168    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2169      to avoid negative values in shallow regions.
2170      - updated verification/natl_box/results/output.txt
2171      - updated verification/lab_sea/results/output.txt
2172    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2173    o Added useSingleCpuIO option (see PARAMS.h).
2174    o Updated useSingleCpuIO option in mdsio_writefield.F to
2175      work with multi-field files, e.g., for single-file pickup.
2176    o pkg/seaice:
2177      - bug fix in growth.F: QNET for no shortwave case
2178      - added HeffFile for specifying initial sea-ice thickness
2179      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2180    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2181      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2182    o pkg/seaice:
2183      - adjoint-friendly modifications
2184      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2185    
2186    checkpoint48e_post
2187    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2188    o dynamics: change definition of computational domain & adapt mom_fluxform
2189      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2190    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2191        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2192        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2193        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2194        inverted_barometer solid-body.cs-32x32x1
2195      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2196    
2197    checkpoint48d_post
2198    o in preparation for r*:
2199     a) use pre-computed gradient of hydrostatic potential:
2200        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2201     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2202        => affects results of glob_oce_pressure (different truncation error)  
2203      update output.txt of ideal_2D_oce & global_ocean_pressure
2204    
2205    checkpoint48d_pre
2206    o in preparation for r*:
2207      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2208      pass the 2 comp. of the grad. as arguments to momentum S/R.
2209      but for the moment, only used if it does not change the results.
2210    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2211    
2212    checkpoint48c_post
2213    Modifications in treatment of initial flux forcing controls
2214    to avoid extra storing of flux fields.
2215    
2216    checkpoint48c_pre
2217    o Added tidal_basin_2d experiment (currently 1D!)
2218    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2219    
2220    checkpoint48b_post
2221    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2222     (modification to pressure gradient not yet implemented)
2223    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2224      (for U & V) that are used for vertical advection of momentum.
2225    
2226    checkpoint48a_post
2227    o In preparation for r*, use temp. array to compute vertical transport
2228       in flux-form momentum pkg. => change results of few test-exp.
2229      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2230                        lab_sea, natl_box & plume_on_slope
2231    
2232    checkpoint48
2233    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2234    
2235    checkpoint47j_post
2236    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2237    o moved adexch from forward_step to addummy_in_stepping
2238    o added exch in ctrl_map_...
2239    o aveFreq.=0. at end of cost_final to avoid overwrite in
2240      reverse checkpointing loop
2241    o Yet more changes in gmredi:
2242      * adgmredi_calc_tensor
2243        avoiding all recomputation of gmredi_slope_limit
2244      * adgmredi_x/y/rtransport
2245        added flag for excessive storing to avoid recomp. of
2246        u/v/rtans, dTdx/y/z
2247        -> this is not really necessary and very memory-consuming
2248      * adgmredi_slope_psi:
2249        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2250      * gmredi_slope_limit
2251        re-activated full calculation of taperfct for case 'ac02'
2252    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2253    
2254    checkpoint47i_post
2255    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2256    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2257      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2258    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2259    o gmredi: fix few bugs.
2260    
2261    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2262    This will be a good checkpoint to plug into the ecco-branch.
2263    o few modif.'s to get latest version adjointed
2264      (mainly kick out code in ini_linear_phisurf)
2265    o modif's to run adjoint with exactConserv
2266    o case GM_BOLUS_ADVEC should be cleaned
2267      S/R gmredi_slope_psi should be cleaned
2268    o verification/carbon now has exactConserv=.TRUE.
2269    
2270    checkpoint47g_post
2271    o time-average AIM output: becomes independent from statvars time-average
2272      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2273    o After TAF bug fix:
2274      Tested adjoint of gmredi package.
2275      Tests were done with checkpoint47 rather than with latest
2276      checkpoint47f_post since the latter is broken for the adjoint
2277      verification/carbon/ contains both ADM and TLM gradient checks.
2278    Here they are, before they get changed/lost/stolen.
2279    Mostly modif.'s to fix numerical sensitivities.
2280    Gradient checks OK for
2281    - GM_taper_scheme:
2282      * clipping
2283      * ac02
2284      * linear
2285      * glw91
2286      * dm95
2287      * ldd97
2288    - GMREDI_OPTIONS:
2289      * GM_VISBECK_VARIABLE_K
2290      * GM_NON_UNITY_DIAGONAL
2291      * GM_EXTRA_DIAGONAL
2292      * GM_BOLUS_ADVEC
2293    in conjunction with data.gmredi parameters to be checked in
2294    in a few minutes under verification/carbon/code/
2295    
2296    checkpoint47f_post
2297    Merging from release1_p10:
2298    o modifications for using pkg/exf with pkg/seaice
2299      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2300        and SEAICE_EXTERNAL_FLUXES
2301      - pkg/exf CPP options EXF_READ_EVAP and
2302        EXF_NO_BULK_COMPUTATIONS
2303      - usage examples are Experiments 8 and 9 in
2304        verification/lab_sea/README
2305      - verification/lab_sea default experiment now uses
2306        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2307    
2308    checkpoint47e_post
2309    o created a tag prior to creating a branch
2310    
2311    checkpoint47d_post
2312    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2313      at the bottom boundary had an erroneous half slip boundary condition
2314    o added bottom drag and no slip boundary condition capabilities to
2315      oceanic pressure coordinates code
2316    o added new verification experiment global_ocean_pressure, this experiment is
2317      also described in the tutorial section of the manual
2318    checkpoint47d_pre
2319    
2320    checkpoint47c_post
2321    o Added a verification experiment for a global cubed-sphere ocean run
2322      -  verification/global_ocean.cubed32x32x30
2323      -  uses pkg/therm_seaice and pkg/bulk_forcing
2324    
2325    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2326    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2327      when using P-coordinate; only implemented for atmospheric config.
2328    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2329      NOTES: requires option NONLIN_FRSURF to be "#define".
2330    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2331    
2332    checkpoint47b_post
2333    Merging from release1_p9:
2334    o pkg/seaice
2335      - removed GOTO's and added taf directives
2336      - double precision constants to reduce the g77 (Linux)
2337        to F77 (SGI) differences reported in release1_p8
2338    o tools/genmake
2339      - added SGI options
2340    o verification/testscript
2341      - updated to that of checkpoint47a_post
2342    o verification/global_ocean.90x40x15/input/eedata
2343      - modified for SGI f77 compatibility
2344    o verification/lab_sea
2345      - added description of sea-ice model
2346      - added missing matlab routines
2347      - added test of thermodynamics parallelization
2348    
2349    checkpoint47a_post
2350    o new pkg: aim_v23
2351     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2352       for now, keep the same surface forcing as before.
2353     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2354     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2355     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2356    o add diagnostic of surface correction term in monitor output
2357    
2358    o bulk_force and therm_seaice
2359    - Two packages:  bulk_force (Bulk forcing)
2360      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2361    - Earlier integration from Stephaine Dutkiewicz
2362      and Patrick Heimbach.
2363    - Two ifdef statements for compile time,
2364       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2365    
2366    checkpoint47
2367    differentiable version of checkpoint46n_post
2368    o bug fix in quasihydrostaticterms
2369    o * "clean" adjoint code (in terms of extensive recomputations)
2370        can now be obtained for all GMREDI options (i.e. for
2371        - GM_VISBECK_VARIABLE_K
2372        - GM_NON_UNITY_DIAGONAL
2373        - GM_EXTRA_DIAGONAL
2374        - GM_BOLUS_ADVEC )
2375      * However, wrong gradient check problem remains unsolved.
2376      * New CPP options have been introduced for different
2377        tapering schemes
2378    o external_fields_load now part of differentiation list
2379    o pressure needs multiple storing;
2380      would be nice to have store_pressure at beginning or
2381      end of forward_step, e.g. by having phiHyd global (5-dim.)
2382      (NB: pressure is needed for certain cases in find_rho,
2383      which is also invoked through convective_adjustment).
2384    o recomputations in find_rho for cases
2385     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2386    o #define ATMOSPHERIC_LOADING should be differentiable
2387    o ini_forcing shifted to begining of initialise_varia
2388    o Incorporating QNVS line search routines into MITgcm
2389      (this is separate code, and therefore not under pkg)
2390      lsopt/, optim/
2391    o Updated verification/carbon/
2392      - #define GM_VISBECK_VARIABLE_K
2393      - GM_taper_scheme    = 'ldd97'    
2394    
2395    checkpoint46n_post
2396    Merging from release1_p8:
2397    o verification/natl_box:
2398      updating new external_fields_load routine
2399    o New package: pkg/seaice
2400      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2401      The sea-ice code is based on Hibler (1979-1980).
2402      Two sea-ice dynamic solvers, ADI and LSR, are included.
2403      In addition to computing prognostic sea-ice variables and diagnosing
2404      the forcing/external data fields that drive the ocean model,
2405      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2406      The implied surface heat flux is then stored in variable
2407      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2408      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2409      non-local transport term.  Because this call precedes model
2410      thermodynamics, temperature under sea-ice may not be "exactly" at
2411      the freezing point by the time theta is dumped or time-averaged.
2412      N.B.: fairly large differences in accuracy occur across
2413            different platforms/compilers; comparison between
2414            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2415            generated output gives:
2416       T           S           U           V
2417      C D M    c        m  s        m  s        m  s        m  s
2418      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2419      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2420      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2421    
2422      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2423    o GAD:
2424      - generated new common blocks to account for call of
2425        same gad routines with differing traceridentities
2426        (needed to modify tracerIdentity indices in GAD.h)
2427      - generated separate common blocks for case useCubedSphereExchange
2428        (Department of Futurology)
2429      - parameter lists to gmredi_?transport: added tracerIdentity
2430      - added new key indices to tamc.h
2431    o external_fields_load:
2432      - added this routine to TAF list
2433      - needed to make some common blocks global and additional storing
2434        along the same lines as exf package (checkpoint_lev?_directives.h)
2435    o exf:
2436      updated external forcing package
2437      - bug fixes carried over from ecco-branch
2438        (missing OBCS_OPTIONS.h in two routines)
2439      - enable easy to use "no forcing".
2440      - added exf I/O for atmospheric loading
2441      - added exf I/O for runoff data
2442      - transfered scaling between exf <-> MITgcm to exf namelist
2443    o Adding new verification experiment global_with_exf.
2444      This verification experiment is almost identical to the
2445      global_ocean.90x40x15 experiment, except that it uses
2446      the exf (and cal) package instead of the
2447      external_fields_load routine (cf README file).
2448    
2449    checkpoint46m_post
2450    o modified testscript to return -- when there are no lines of "%MON" output
2451    o added new flag "quasiHydrostatic" for QH mode
2452      and new routine quasihydrostaticterms()
2453    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2454      New routine: mom_u_coriolis_nh()
2455    o fixed sign of non-hydrostatic metric terms in u and v equations.
2456      Depend on correct sign of gravitySign.
2457    o added work.pc* to .cvsignore in aim directories using ifc
2458    o introduced flag for controllin non-hydrostatic metric terms
2459    o removed gravitySign from PARM04
2460    o switched to g77/ifc from pgf77 in aim experiments
2461    
2462    checkpoint46l_post
2463    o made convective adjustment work with pressure coordinates:
2464     - changed the direction of k-loop in convective_adjustment.F for the
2465       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2466     - adjusted the reference pressure k-index in convective_adjustment.F
2467     - adjusted the convection condition in convect.F (in analogy to
2468       calc_ivdc.F)
2469     - convective_adjustment no longer computes anything on the halos
2470     - removed the warnings about negative salinity from find_rho.F and
2471       find_alpha.F; instead the new routine look_for_neg_salinity, called
2472       at the beginning of find_rho, find_alpha, and find_beta, does a
2473       check of the entire slice, if CPP-option
2474       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2475    checkpoint46l_pre
2476    
2477    checkpoint46k_post
2478    o fixed the verification/global_ocean.90x40x15 experiment:
2479     - new bathymetry (the world according to A., JMC, and M.)
2480     - new initial fields and forcing fields (*.bin files)
2481     - new POLY3.COEFFS (for the next release one should switch to a full
2482       equation of state: JMD95P or MDJWF)
2483     - fixed several errors and redundancies in the data file
2484     - experiment uses looped cells
2485     - added matlab directory with diagnostic scripts for plotting of output
2486    
2487    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2488     - read AIM physics parameters from a file (data.aimphys)
2489     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2490    
2491    checkpoint46j_post
2492    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2493    o move wVel computation at the end of the time step, in S/R integr_continuity
2494    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2495    o update timeave pkg for wVel diagnostic.
2496    checkpoint46j_pre
2497    
2498    checkpoint46i_post
2499    o Clean up AIM package (and keep the results unchanged):
2500      include CPP_OPTION and use IMPLICT NONE in all routines ;
2501      declare all the variables _RL ; use _d 0 for all numerical constants.
2502      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2503    
2504    checkpoint46h_post
2505    o cleaned up the use of rhoNil and rhoConst.
2506      - rhoNil should only appear in the LINEAR equation of state, everywhere
2507        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2508        and the dynamical equations are all divided by rhoConst
2509    o introduced new parameter rhoConstFresh, a reference density of fresh
2510      water, to remove the fresh water flux's dependence on rhoNil. The default
2511      value is 999.8 kg/m^3
2512    o cleanup up external_forcing.F and external_forcing_surf.F
2513      - can now be used by both OCEANIC and OCEANICP
2514    checkpoint46h_pre
2515    
2516     Added code to convert surface volume flux (fresh water) into
2517     a mass flux when using P coordinates in the ocean (OCEANICP).
2518     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2519    
2520    checkpoint46g_post
2521    o Include a new diagnostic variable phiHydLow for the ocean model
2522      - in z-coordinates, it is the bottom pressure anomaly
2523      - in p-coordinates, it is the sea surface elevation
2524      - in both cases, these variable have global drift, reflecting the mass
2525        drift in z-coordinates and the volume drift in p-coordinates
2526      - included time averaging for phiHydLow, be aware of the drift!
2527    o depth-dependent computation of Bo_surf for pressure coordinates
2528      in the ocean (buoyancyRelation='OCEANICP')
2529      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2530        Theta, Salinity, and Pressure in the parameter list. This routine is
2531        presently contained in find_rho.F. This routine does not give the
2532        correct density for 'POLY3', which would be a z-dependent reference
2533        density.
2534    o cleaned up find_rho
2535      - removed obsolete 'eqn' from the parameter list.
2536    o added two new verification experiments: gop and goz
2537      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2538    checkpoint46g_pre
2539    
2540    checkpoint46f_post
2541    o Enable tangent linear (forward mode) gradient checks:
2542      - extended active file handling to g_... files
2543      - added TANGENT_SIMULATION to theSimulationMode
2544      - extended grdchk package accordingly
2545    o added tangent linear setup in verification/carbon/code_ftl
2546    o added adjoint setup in verification/front_relax/code_ad
2547    
2548    checkpoint46e_post
2549    o Added new equation of state -> MDJWF
2550      - EOS of McDougall et al., 2002, JAOT, submitted
2551      - caveat: the equation of state is only valid for a smaller (more
2552        realistic?) range of values than JMD95P/Z and UNESCO
2553      - added masks to the calculation of pressure in store_pressure
2554      - added more check values for density in check_eos (ini_eos.F), some of
2555        the old check values are out of the range of the MDJWF-eos, so don't
2556        expect perfect matches for those
2557    checkpoint46e_pre
2558    
2559    checkpoint46d_post
2560    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2561      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2562      case of pressure coordinates. eosType='JMD95Z' in
2563      combination with buoyancyRelation='OCEANICP' now causes an error.
2564    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2565      in find_alpha/beta.
2566    checkpoint46d_pre
2567    
2568    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2569      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2570    
2571    checkpoint46c_post
2572    o Changes necessary for ocean in p-coordinates
2573     -  Added new buoyancy relation = 'OCEANICP'
2574     -  Added new parameters = gravitySign (this used to be contained inside
2575        the factor dRdZ which I added when we first switched to R coordinates).
2576     X GM/Redi is not compatible (yet)
2577     X bottom drag and no-slip need to be debugged.
2578    checkpoint46c_pre
2579    
2580    checkpoint46b_post
2581    o Added new equation of state -> JMD95Z and JMD95P
2582      - EOS of Jackett and McDougall, 1995, JAOT
2583      - moved all EOS parameters into EOS.h
2584      - new routines ini_eos.F, store_pressure.F
2585    o Added UNESCO EOS, but not recommended because it requires
2586      in-situ temperature (see JMD95)
2587    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2588      unesco.f to be used with POLY3
2589    checkpoint46b_pre
2590    
2591    checkpoint46a_post
2592    o Added (atmospheric) pressure loading
2593      - new field in FFIELDS.h, etc...
2594      - new cpp flag ATMOSPHERIC_LOADING
2595    o Changed hFacC to _hFacC in calc_phi_hyd.F
2596    o Added SHORTWAVE_HEATING to some files for consistency
2597    checkpoint46a_pre
2598    
2599    checkpoint46
2600    further merges from release1_p5
2601    o new ctrl package
2602      - adopted from ECCO environment to enable optimization
2603      - added Eliassen Palm fluxes to controls
2604    o added Eliassen Palm flux controls to gradient check package
2605    o cost package
2606      - Compatible with new ctrl package
2607      - added Eliassen Palm cost hooks
2608      - modif's of existing cost functions
2609    o Adjoint-related bug fixes in kpp:
2610      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2611      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2612    o autodiff package
2613      - flow directives:
2614        + new for S/R do_the_model_io
2615        + enhanced for S/R checkpoint
2616        + new gmredi.flow
2617      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2618        disable adcommon.h/g_common.h by default.
2619      - fixed problem for adjoint of global_max
2620    o modified verification/carbon/
2621    o New setup for adjoint of global_ocean
2622    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2623    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2624    o incorporated hooks for sponge layer code (external_forcing.F)
2625    
2626    checkpoint45d_post
2627    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2628    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2629      (affects plume_on_slope "cg2d" output)
2630    o add new parameter deltaTfreesurf for free-surface time stepping
2631    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2632    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2633    o change phiMin in exp1 (to agree with documentation)
2634    o add new flags:
2635     - T,S forcing inside/outside Adams-Bashforth
2636     - turn off temp,salt advection and/or forcing
2637     - for each tracer, define internal flag for multiDimAdvection & A-B
2638    o monitor: change definition of KE to check conservation of Energy
2639    
2640    checkpoint45c_post
2641    o Removed f90 comments ("!")
2642    o Modified initialisations to enable exf package for MITgcm
2643      (without invoking ECCO_PACKAGE).
2644    o modifications to gradient check package (Martin Losch)
2645      - enable centered differences
2646      - modified format of standard output
2647    
2648    checkpoint45b_post
2649    o cleaned exchange calls in cg2d
2650    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2651    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2652      to configure barotropic setup (Martin Losch)
2653    o moved some initialisations within bi,bj loop in dynamics
2654      (TAF flow dependency)
2655    o in initialise_varia, moved call packages_init_variables
2656      before convective_adjustment_init
2657      (corresponding adjustment of TAF tape initialisation).
2658    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2659    
2660    checkpoint45a_post
2661    o compute Rho over the whole domain (extend iMin,jMin indices)
2662    o specific exchange for X-slice domain (case Ny=1)
2663    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2664    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2665    
2666    checkpoint44h_post = checkpoint45
2667    o Fix to restore differentiability:
2668      place at which packages_init_variables is called in
2669      initialise_varia is crucial for reverse control flow.
2670    o modifications in GMRedi to enable stable adjoint
2671      (corresponding modif's in thermodynamics, dynamics)
2672    o added missing hook for sponge layer code in external_forcing
2673    o modified test cost functions
2674    o storing in gad_advection (plus removal of write(0,*)!
2675    o missing headers TR1.h added in convective_adjustment routines
2676    o errorMessageUnit set non-equal zero in eeboot
2677      (conflict on some platforms, e.g. IBM SP3)
2678    o modified carbon verif.
2679    
2680    checkpoint44h_pre
2681    o vertical grid option: allow to put the Interface at the middle between
2682      2 cell-centers ; replace delZ in pkg/kpp by drF.
2683    o GM Advective form: Tracers are advected using the residual transport (=
2684      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2685    
2686    checkpoint44g_post
2687    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2688      results) ; ifdef missing in thermodynamics.F
2689    
2690    checkpoint44f_pre,checkpoint44f_post
2691    o added PTRACERS package
2692      This allows an arbitrary number of passive tracers to be integrated
2693      forward simultaneously with the dynamicaly model.
2694      + Implemented so far:
2695        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2696        - I/O and checkpointing
2697        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2698      + Not implemented so far:
2699        - KPP
2700        - OBCS
2701      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2702        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2703        line in data.pkg.
2704      + This package is disabled by default since it increases storage.
2705    
2706    
2707    o testscript: added -cleanup option
2708    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2709                 b) enable to filter 2D fields.
2710    
2711    checkpoint44e_pre,post
2712    o re-wrote convective adjustment to use pre-calculated weights
2713      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2714      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2715      Original calls to convect() still in place.
2716    
2717    chkpt44d_pre,post
2718    o added missing EXCLUDE_MONITOR flags
2719    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2720      (incompatible typ in MIN/MAX expressions caused problems
2721      on IBM SP3)
2722    o in genmake added variable MAKEDEPEND
2723      plus resetting for case SunOS
2724    o added timer_stats.c routine for IBM SP3
2725    o removed variables in dynamics
2726    !!! I forgot to create tag chkpt44d_pre !!!
2727    !!! But chkpt44d_pre = chkpt44c_post    !!!
2728    
2729    o real fresh water flux implemented with non-linear free-surface.
2730    
2731    chkpt44c_pre,post
2732    o few fix (mask in shap_s2, EmPmR in external_field_load,
2733      USE_NATURAL_BCS in solve_for_P);
2734    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2735    
2736    checkpoint44b_pre/_post
2737    o merge of relevant stuff from the ecco-branch:
2738      - genmake: removed $S64 overwrite for case SunOS
2739      - pkg/exf: update and corrections for field swapping and obcs
2740      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2741                  harmonized between ECCO and MITgcm
2742      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2743                      updated checkpointing_lev... lists for obcs
2744      - model/src: minor changes in forward_step, plot_field
2745                   added directive for divided adjoint in the_main_loop
2746      - pkg/mdsio: added mdsio_gl_slice
2747    
2748    o check parameters & config (chkpt44a_pre,post)
2749    o OBC and NonLin_FrSurf.
2750    
2751    checkpoint44
2752    o fix bug in mom_vi_del2uv
2753    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2754    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2755    o update AIM experiments (NCEP input files)
2756    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2757    o added some stuff for AD
2758    
2759    checkpoint43
2760    o added two new advection tests
2761    o added global 4x4 degree ocean test
2762    o added test of H&S94 with free surface on cube
2763    o some final mods for gradient check, adjoint,...
2764    
2765    checkpoint42
2766      Fixed AD-related problems:
2767    o Store directives up-to-date with re-arranged Adams-Bashforth
2768      (mainly thermodynamics.F)
2769    o New store directives for multi-dim. advection schemes
2770      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2771      * new common block and key passkey
2772      (mainly gad_advection.F)
2773    o Modified store directives for split of dynamics/thermodynamics
2774      for the case ALLOW_KPP
2775    o Cleaned argument list for timestep_tracer.F
2776    
2777    checkpoint41
2778    o re-formatted/added comments in prologues of key subroutines
2779      to work with protex
2780    
2781    checkpoint40
2782    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2783    o added FLT (floats) package from Arne along with demo. experiment
2784    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2785      implementation of forward-in-time forcing terms
2786    o more mods for non-linear free-surface including new variable
2787    o modified multi-dim method to work on cube
2788    o bug fix in KPP (from DM)
2789    
2790    checkpoint40pre9
2791    o added DST advection schemes
2792    o fix MPI bug on SGI's
2793    o modifications for non-linear free-surface
2794    o fixed conditionals for fixed flow/passive tracer only mode
2795    o added tension/strain form of stress tensor
2796    o changes to commenting of arguments for TAF/TAMC
2797    o added/updated many matlab scripts
2798    o added multi-dimensional advection method for tracers
2799      
2800    checkpoint40pre8
2801    o new package rw/
2802      Added method for dumping intermediate local arrays:
2803      mdsio_writetile - same as mdsio_writefield except works from inside
2804                        bi,bj loop
2805      mdsio_writelocal - same as mdsio_writetile except works for local
2806                         arrays
2807      write_local_r? - higher-level wrapper for mdsio_writelocal
2808      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2809      Example given at end of mom_vecinv.F that dumps some local arrays.
2810    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2811      control flux-form versus vector invariant code.
2812      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2813      or genmake -DISABLE ...
2814    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2815      (additional storing is now needed for case vecinv;
2816      currently nothing implemented to switch this storing off
2817      in case fluxform is used since no CPP flag available).
2818    
2819    checkpoint40pre7
2820    o bug fix in dynamics.F
2821      calc_viscosity called before k=1,Nr loop.
2822    o added some #ifdef's ALLOW_PASSIVE_TRACER
2823    o cleaned initialisations in ctrl_map_ini
2824      related to TAF
2825    
2826    checkpoint40pre6
2827    o split dynamics into thermodynamics & dynamics
2828    o corresponding split of calc_diffusivity into
2829      calc_diffusivity, calc_viscosity
2830      (kpp_calc_diff, kpp_calc_visc).
2831    o Added diffkr, kapgm to control variables
2832    o bug fix in gmredi_slope_limit for ldd97
2833    
2834    checkpoint40pre5
2835    o proper initialization of Adams-Bashforth time stepping
2836      + uses forward step for very first step of model (iter=0)
2837    o re-generated *all* output since almost all output is modified by this
2838      change (sorry but we've been putting this one off for about 2 years)
2839      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2840        *not* regenerated since they are already out of date and I don't
2841        want to create the impression that they are suddenly working.
2842    o removed KAP stuff for DEC's
2843    o modified/added many .cvsignore files in */code and */input
2844    o added new expt "solid-body.cs-32x32x1"
2845      + this uses an alternative form of ini_curvilinear_grid.F which
2846        is not necessarily any better than the current one...
2847    
2848    checkpoint40pre4
2849    o added re-initialisations of utrans,vtrans,rtrans in
2850      calc_common_factors which are crucial for TAF.
2851    o extended iMin,jMin range for calc_common_factors,
2852      calc_diffusivity
2853    o added option ALLOW_PASSIVE_TRACER
2854    o a few minor updates and fixes
2855    
2856    checkpoint40pre3
2857    o created calc_gtr1.F for gad package
2858    o split the_main_loop and re-introduced forward_step
2859    o some recomputations of nIter0 for TAMC
2860    
2861    checkpoint40pre2
2862    o Updated to latest branch of AJA, JMC
2863    o Added gradient check package
2864    o Added routines for passive tracer handling
2865    o Added carbon sequestration sensitivity experiment
2866    
2867    checkpoint39
2868     o Modifications and fixes to support TAMC
2869       (mainly missing or wrong directives)
2870     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2871       in addummy_in_stepping
2872     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2873     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2874     o Included following packages:
2875       cal: calendar
2876       exf: external forcing
2877       ecco: essential routines to control use of cal, exf
2878             (NB: this is not the full ECCO environment)
2879     o disabled some packages by default in genmake
2880    
2881    checkpoint38
2882     o see notes_c37_adj.txt
2883     o corrected wrong layer index in external_forcing_t
2884     o replaced the_main_loop/forward_step by the_main_loop
2885     o removed forceoutput from write_state
2886       (replaced criteria for initial/final state)
2887     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2888    
2889    checkpoint37
2890     o mdsio.F routine split and packaged in pkg/mdsio
2891       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2892        used unless genmake -disable=mdsio)
2893     o allow a more precise surface-geopotential gradient for the atmosphere
2894       taking into account the change in space of Alpha (=1/rho) at the surface.
2895     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2896       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2897     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2898       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2899       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2900     o Time-Average diagnostics defined as a pseudo package "timeave".
2901     o pickup files : old pickup (before c35) did not work with new code (c35
2902       and after) unless activating 2 commented lines in initialise-varia.
2903     o Non-Hydrostatic pickup file Pb fixed.
2904     o bug with Rigid-lid version (since c35) fixed.  
2905    
2906    checkpoint36
2907     o implement Crank-Nickelson barotropic time-stepping
2908     o recover Time-Average diagnostics
2909     o fix Pb in checkpoint (PR#19)
2910     o AIM become a standard package ; clean unused CPP_kees
2911    
2912    checkpoint35
2913     o subtantial rewrite of dynamics.f
2914     o allows staggered time-stepping
2915     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2916     o added bottom drag (linear + quadratic)
2917    
2918    checkpoint34
2919     o Modified exchange routines for correct reverse simulation.
2920     o Added verification output to comply with bug fix in impldiff.F
2921       as of c33 (exp2, natl_box).
2922     o Corrected store directives in dynamics.F
2923     o Corrected array boundaries in impldiff.F
2924     o Corrected array dimensions in gmredi.
2925       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2926     o Added routine GLOBAL_SUM_INT to global_sum.F
2927     o Added mdsio_gl.F for ECCO purposes.
2928    
2929    checkpoint33
2930     o Fixed bug in lower BC in impldiff.F
2931     o Fixed confusion about units of forcing arrays in FFIELDS.h
2932       namely Fu,Fv,Qnet,Qsw,EmPmR:
2933       - Removed verification/natl_box/code/external_fields_scale.F
2934         (did not differ from that in model/src)
2935       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2936         (see FFIELDS.h for description)
2937       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2938         kpp_calc.F and kpp_transport_t.F
2939       - Removed model/src/external_fields_scale.F and calls to it
2940       - verification/natl_box uses flux data with "atmospheric" sign so
2941         a special version of external_fields_load.F is used to
2942         change the data as it's read in. This way, the arrays
2943         have the right units and signs at all times tha a user could
2944         possibly use them.
2945     o Corrected genmake to delete a temporary file during configuration
2946    
2947    checkpoint32
2948     o Scaling of forcing fields moved from external_forcing.F to
2949       external_fields_scale.F, called directly after loading fields.
2950     o Surface relaxation terms added to surface tendency fields in
2951       extra subroutine.
2952     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2953       fields.
2954     o Changes in GMRedi to comply with packaging structure.
2955     o Modifications and bug fixes in KPP package.
2956     o Verification experiment for KPP added (verification/nat_box/)
2957    
2958    checkpoint31
2959     o Packages interface brought in line with defined standard
2960       -> new routines packages_...F
2961       -> changes in initialise_fixed.F, initialise_varia.F
2962       -> enables initialisation interface for ECCO package
2963     o Rescaling of external forcing fields immediately after read
2964       (removed from external_forcing.F)
2965       -> new: surface_fields_scale.F
2966       -> affects ini_foorcing.F, external_fields_load.F
2967     o Computation of surface tendencies before tendency updates.
2968       -> new: external_forcing_surf.F
2969     o Change of variable names useGMRedi, useKPP, useECCO
2970     o Further changes in dynamics.F, impldiff.F for TAMC
2971     o Tested for experiments 0, 2, 4.
2972       - not yet tested for GMRedi.
2973       - not yet tested for KPP.
2974    
2975    checkpoint30
2976     o Updates for OBCs
2977     o New experiment for test OBCs (internal_wave)
2978     o New output.txt in verification/exp4/results/
2979     o Updates for KPP: calculation of viscosity corrected, new variables
2980       kpp_dumpFreq and kpp_taveFreq
2981     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2982       and entry for T90 in genmake
2983    
2984    checkpoint29
2985     o packaged KPP and GM/Redi
2986    
2987    checkpoint28
2988     o Corrected initialization of hFacMin for difference vertical coordinates
2989     o Modified calculation of partial cell thickness to more robust algorithm
2990     o config_summary.F: replaced write_1D_... by write_0D_...
2991       read_write.F: added subroutines write_0D_...
2992     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2993       included some initialisations required for TAMC.
2994     o routine calc_isoslopes: modified sqrt computation to make it
2995       differentiable for zero argument.
2996     o routines dynamics, impldiff:
2997       included store directives and tape key computations required for TAMC.
2998     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2999    
3000  checkpoint27  checkpoint27
3001   o fixed calc_isoslopes() to so that cancellation of terms in tensor   o fixed calc_isoslopes() to so that cancellation of terms in tensor
3002     formulation works properly with variable resolution.     formulation works properly with variable resolution.

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